July 11, 2018

A brief analysis of the new requirements of cutting tools development on tool grinder

Most ordinary HSS cutting tools and the common welding carbide cutting tools have been unable to meet the requirements of modern processing technology, and gradually be precision overall carbide cutting tools and all kinds of nc indexable tool, precision carbide cutting tools with high speed steel cutter, the common welding tool in the process of grinding process on the requirements for the performance of the machine tool has the very big difference, and the launch of high-precision CNC multi-axis linkage tool grinder and the development of machine tool grinding function and performance meet the carbide cutting tools large quantities of many kinds of high precision grinding process requirements.

CNC tool grinding machine of all brands are generally possess powerful CNC software simulation to edit and high precision grinding machine control system, processing the products according to customer's demand, the tool grinding machine of different brand has its unique advantage: if some suitable for small and medium-sized specifications of large quantities of precision machining tool, some suitable for high precision, small size some suitable for large diameter high efficiency high precision machining, some suitable for processing of non-standard cutting tools, some machine efficiency fitted her for more specifications small batch processing, some suitable for super long diameter cutter blade processing, etc.

The tool grinding machine tool manufacturing now use mainly divided into two kinds, one kind is the import of five axis, six axis linkage CNC tool grinding machine, the main brands are ROLLOMATIC, three berger, EWAG, AGTHON, WALTER, WENDT, Shute, sarkozy, ANCA, dirk, TTB and other international brand; The first kind is the domestic and foreign simple and multifunctional hand special grinding machine, the main brand has deminna, beipin machine tool, nanjing only higher.

CNC tool grinding machine generally adopts world advanced electric control software system, data precision guide rail and the screw motor system, positioning system and other advanced precision grating and servo motor feedback module design, therefore, the CNC tool grinding machine has high precision grinding motion control technology, CNC tool grinding machine is equipped with a powerful 3 d machining simulation software, the user can according to your own cutting tool structure and parameters design requirements online simulate machining tool shape you want. The specialcuttingtool grindingmachine is characterized by simple structure and convenient operation. It is mainly used in the production of non-standard tool and manual tool grinding.

The grinding performance characteristics of various tool grinding machines provide a good choice space for tool manufacturers. Users can choose suitable tool grinding machines according to their own processing characteristics and production scale. The continuous innovation of various tool grinding machines in grinding technology and control function has promoted the continuous progress of tool grinding technology, and provided the guarantee for complex tool structure design and geometric dimension control. But at the moment, the threshold of the carbide cutting tools manufacture, decrease of promotes the expanding tool manufacturing industry, speeding up the cutting tool industry market competition, also prompted precision carbide cutting tools production costs and selling prices are lower. With improved precision carbide cutting tools performance will continue to replace tool market of high speed steel and carbide welding tool, the market demand of precision carbide cutting tools and its market tool use proportion will continue to improve, and the widespread use of precision carbide cutting tools will bring China's manufacturing industry rapid progress and development.

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July 09, 2018

Deep hole machining of tungsten carbide drill bits

The so-called deep hole processing, is the length of the hole and hole diameter ratio greater than 5 holes. In general, deep hole machining, deep hole diameter ratio L/d is more than 100 in most cases. Such as cylinder hole, axial shaft oil hole, hollow main shaft hole and hydraulic valve hole, etc. Some of these holes require high machining precision and surface quality, and some of the processed materials have poor machining performance, which is often a big problem in production.

In most cases, the depth ratio of L/d is greater than or equal to 100. Such as oil cylinder hole, axial shaft oil hole, rocket body and various gun barrel, etc. Some of these holes require high machining precision and surface quality, and some of the processed materials have poor machining performance, which is often a big problem in production. As a result, deep hole machining has received much attention from many people, and more and more people have entered the deep hole machining industry of tungsten carbide drill bits.

Process features:

1. The tool bar is limited by the aperture, with small diameter and large length, resulting in poor rigidity and low strength. It is easy to generate vibration, ripple and taper when cutting, and affects the straightness and surface roughness of the deep hole.

2. When drilling and reaming, it is difficult to enter the cooling lubricant into the cutting area without using special equipment, so as to reduce tool durability and chip removal.

3. in the process of deep hole processing, cannot be directly observed tool cutting condition, with only the sounds of our experience in listening to the cutting, the chip, hand to touch the workpiece temperature and vibration, meter and electric meter (hydraulic table), to determine the cutting process is normal.

4. It is necessary to use reliable means to break the chip and control the length and shape of the chip, so as to facilitate the smooth elimination and prevent the chip from clogging.

5. in order to ensure that in deep hole machining process smoothly and reach the processing quality of should be required, should increase the cutting tool inside (or outside) chip removal device, cutting tool to guide and support device and high pressure cooling lubrication device.

6. Poor heat dissipation conditions of the tool, higher cutting temperature and lower tool durability.

Deep hole machining has been widely used in the mould industry, which solves the problem of fine hole and long hole which cannot be solved by common drilling machine. The machining cost of the mould is effectively reduced. To undertake the most sophisticated deep hole processing, the hole diameter 3-35 length can be up to 2,600. The channel hole, oil channel hole, air hole, single oblique hole, double oblique hole, screw hole, pin hole and so on are solved to the maximum.

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July 06, 2018

How to improve the machining efficiency of diamond circular saw blades

In the process of processing marble and granite from waste materials into veneer boards, sawing and cutting is a crucial process. The sawing and processing cost accounts for more than 50% of the total stone processing cost. Therefore, reducing the manufacturing cost of saw cutting tool, diamond circular saw blade cutting tool, and improving its service performance and life, has become one of the important ways to reduce stone processing cost.
At present, the powder metallurgy compaction molding method is widely used to manufacture diamond circular saw blade cutter head (node) at home and abroad, but this technology has the following disadvantages:
(1) high requirements on diamond grade;
(2) strict requirements on the design and process of the tread formula, otherwise the diamond will be easy to fall off;
(3) the process will cause thermal damage to diamond, thus affecting the cutting performance of diamond circular saw blade.
The traditional method of making diamond circular saw blades by electroplating is the primary forming method, that is, the diamond tool head is electroplated directly on the substrate. This method has a long production cycle, complicated process and requires mould. The other method is the secondary forming method, that is, the tool head is first made by electroplating process, and then the tool head is embedded into the matrix by electroplating to make the saw blade. Compared with the primary method, the secondary method has a shorter production cycle, a simpler process, no mold required, a lower cost and easy quality control. But as a result of stone industry for cutting tools precision, smoothness, flatness, constantly improve the formability of requirements, using common electroplating process there are still limitations make diamond circular saw blade, due to the limitation of current density, compared with hot pressing molding in the production efficiency is low, small batch production.
In order to improve the machining efficiency of diamond circular saw blade, reduce processing costs, adopted the diamond surface metallization technology in recent years, granulating technology, optimization of cutting parameters, cutting tools and engineered stone material matching, and other means to improve the cutting performance of diamond circular saw blade, diamond segment in the problem of low utilization ratio of still didn't get very good solve.
In this paper, a new technology of making diamond composite base block by electroplating and bonding it into the cutting head of diamond circular saw blade by low melting point powder metallurgy is presented. The process will be plating method at low temperature and powder metallurgy hot-pressing method, can improve the production efficiency and performance of diamond circular saw blade, which can effectively reduce the manufacturing cost of a tool, so has good popularization and application value.
The diamond produced by industry contains impurities, which need to be removed before it can be used. Otherwise, the bonding force between diamond and the tire in the electroplated composite substrate will be reduced. After bath soaking, the wetting property of diamond and bath can be increased, and the bonding force between diamond and matrix material can be improved. The plating substrate shall be deoiled and fully washed before deposition to avoid insulation on the deposition surface and protect the plating solution from contamination.

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July 05, 2018

Analysis of cutting principle for cemented carbide reamer

Low carbon steel is a kind of material with low hardness and high viscosity, so its cutting performance is poor. In order to achieve the maximum surface roughness of the processed hole after finishing, most of them adopt high speed steel reamer, and use low speed reamer to finish the hole machining by drilling, expanding and reaming. Although such a process can meet the requirements of processing precision, but low production efficiency, short tool life. In the process of ream, before cutting edge reamer blade slightly the devolop, will be the hole wall hair, scratch, which affects the surface quality of hole, in order to solve the common process of these ills, carbide reamer hole on finishing high-speed ream experiment was carried out, obtained satisfactory results. The cutting principle of high speed steel reamer and carbide reamer is different, high speed steel reamer relies mainly on the cutting edge sharp to obtain lower surface roughness value, and the carbide reamer is heavily dependent on squeeze cut to obtain lower surface roughness value, so the tool geometric angles are different requirements and cemented carbide reamer.

 

According to the cutting principle, it is required to cut the sharp edge of low carbon steel reamer which is sticky and soft. The blade material has a direct influence on the tool life. After the reamer is made from five different materials of YT15, YA6, YW1, YT5 and YW2, the effect is also different. Made reamer, YT15 material out of the hole surface roughness value is low, but in the process of cutting edge area easy caving, YT5 and YA6 material made ofcemented carbidereamer, surface roughness value after the ream, but quick wear of cutter relative to other blade material, low service life. For the reamer of YW1 material, the surface roughness value Ra= 1.6m after the reamer is hinged. However, due to the low flexural strength of the blade, blade breakage often occurs. Compared with the reamer of the above brands, the reamer made by YW2 has low surface roughness value and high tool life when processing low-carbon steel.

 

Improvement of tool structure. In order to overcome the soft hardness and high stickiness of low carbon steel, the head of the reamer is designed and made into a guide head with a certain Angle. This kind of guide head can not only guide the cutting edge of the tool during cutting, but also make the hole machining more linear. In addition, the residual chip can be pushed out to the front of the hole, which will not make it difficult to discharge the chip. The chip is squeezed into the slot of the reamer, resulting in more chip accumulation and tearing the hole wall, damaging the surface quality of the hole. Cutting tool structure adopted large blade Angle, not only can make the reamer smooth cut, and chip can discharge smoothly, at the same time in order to make the chip has enough capacity space, so the standard reamer to decrease the number of. Whether the machining process is properly prepared or not will directly affect the cutting effect. When cutting low carbon steel, the original drilling, expansion and hinge three processes can be changed into drilling and hinge two processes. Due to the nature of the carbide reamer ream is crowded cut, so it is very important to remain ream cushion before ream, function under ream leave allowance is too small, there wasn't enough margin to cause ream, may lead to the surface of the hole is too big and leave the walls drilling trace; If the residual amount is too large, the cutting resistance will be increased and the tool bar will be distorted. Meanwhile, the tool life will also be significantly reduced, and even a large number of chips will be generated and the surface of the hole will be damaged.

 

Choice of rational cutting allowance to ream holes has a great impact on the quality of low carbon steel material, usingcemented carbidereamer hole for low-speed ream can obtain lower surface roughness value, but the low cutting efficiency; However, the use of moderate speed cutting is easy to produce chip deposition, which affects the surface quality of the hole. High speed cutting is relatively ideal, can greatly improve the productivity, but also can obtain good machining quality, if match with suitable cutting fluid, the cutting tool can improve the life (in extreme pressure cutting fluid is preferred).

 

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June 29, 2018

Application technology of carbide gear cutting tool

In the forming process, the order of movement of the milling tool is as follows: fast forward to the safe distance - work forward to the cutting depth - tool return. SPIRON gear milling cutter process for dry cutting, so the cutting heat generated by the most will be take away by scrap iron, scrap iron in blue, for the best cutting state, so the cutting parameter setting as basic principles.

The cutting line speed of the carbide gear cutting tool is set at 180-220m/min, which is the most suitable. The constant line speed cutting method is usually adopted to reduce tool wear. The selection of cutting parameters is based on: in the initial stage of cutting, the cutting force is not too large, so the feed speed can be increased appropriately, since only the tip part participates in cutting. At the end of the cutting process, most of the cutting edges of the teeth will be involved in cutting, so the feed speed should be reduced. In order to improve the roughness of the tooth surface, the tool needs to stay at the final dimension for a certain time when the tooth depth is reached.

Unlike displayed, when generating method processing tool motion sequence is that fast forward to a safe distance from - to the cutting depth, cutting tool back in work - cutting tool cuts - cradle swing again gradually return finished cutting - tools.

Generative cutting, the cutting depth of the allowance allocation problem: due to the generating method processing, tooling need a second cut, therefore involve generating surplus allocation problem, such as the distribution of allowance is too small, will cause the generative process, tool vibration, tooth surface roughness; If the residual amount distribution is too large, the tool will be under too much force and the tool life will be affected. After a lot of trial and error in the field, the optimal JW machining allowance is 0.3-0.5mm. Generative cutting stage cutting parameter selection: when carries on the generative cutting, generally starting gear big end cutting, cutting allowance is bigger, so at this stage of the feeding should be appropriate, tooth width as generative approaches to the end, because the machining allowance is very small, may be appropriately increased feeding.

Tool wear judgment basis, according to the scrap color judgment

If the tool is in good condition, the iron chips shall be dark blue to light blue, and the surface of the iron chips shall be smooth and smooth. If the cutting tool is in poor condition, or after wear, the cutting iron chip is generally yellow to white, and the iron chip surface is rough and curly, indicating that the cutting heat has not been fully taken away.

If carbide gear cutting tool is in good condition, when cutting, the machine load is stable and the fluctuation is small, the maximum is about 20%. On the contrary, the load of machine tool fluctuates greatly, sometimes reaching more than 30%.

When the cutter is in good condition, the tooth surface is smooth and the burrs are small. When the cutter is in poor condition, the tooth surface is rough and the side burr is large.

Before using the new coated blade, the cutting edge is complete and sharp, and the overall color of the coating is grey and black. After wear, the tool cutting edge coating part has worn, the cutting edge is white, there are some serrated or even broken edges.

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June 27, 2018

The choice of cemented carbide circular blade as the tool for rough machining of dies

Cemented carbide circular blade, called "wafer", is one of the series of hard alloy materials. It is usually used to make hard alloy blades and hard alloy tools, such as hard alloy woodworking tools, carbide cutting machine blades, hard alloy V-CUT knives, hard alloy cutting tools, hard alloy paper cutting knives, hard alloy cutting tools, hard alloy cutting tools, hard alloy cutting tools, and hard alloy cutting tools. Quality alloy hob, carbide circular knife, carbide milling cutter, carbide saw blade, cemented carbide split knife etc. Its application field involves various fields of national production, such as special cutting tools in the electronic industry, special cutting tools in woodworking furniture industry, special cutting tools in hardware machinery processing industry, and the characteristics of hard alloy wafers that are also resistant to corrosion and acid alkali and are not rusty by the food processing industry. With cutting tools, in short, the application range of cemented carbide wafers is very extensive. It is a good assistant material for people's production and processing.

If a shoulder milling cutter is used for rough milling of the cavity, a large amount of step cutting allowance must be removed in semi finishing. This will change the cutting force and make the tool bend. As a result, uneven machining allowance is left to finish machining, thus affecting the geometric accuracy of the die. If the blade tip milling cutter with a weak tip is used (with a triangular blade), it will produce an unpredictable cutting effect. The triangle or diamond blade can also produce greater radial cutting force, and because the number of cutting blades is less, they are poor economiccutting tools.

On the other hand, the circular blade can be milled in all kinds of materials and in all directions. If it is used, the transition between the adjacent tool paths is smooth and a smaller and more uniform machining allowance can be left for semi finishing. One of the characteristics of a circular blade is that the chip thickness they produce is variable. This enables them to use higher feed rates than most other blades. The main deflection angle of the circular blade changes from almost zero (very shallow cutting) to 90 degrees, and the cutting effect is very smooth. At the maximum depth of cutting, the main deflection angle is 45 degrees. When the straight wall profile is cut along the outer circle, the main deflection angle is 90 degrees. This also explains why the strength of the circular blade tool is large -- the cutting load increases gradually. Rough and semi rough machining should always be the first choice for round blade milling cutters, such as CoroMill 200 (see mold manufacturing sample C-1102:1). In 5 axis cutting, the circular blade is very suitable, especially without any restrictions.

By using good programming, the circular blade milling cutter can largely replace the ball end milling cutter. The small circular blade with small pulsation is combined with the fine grinding, positive rake and light cutting groove. It can also be used for semi finishing and some finishing.

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June 22, 2018

How to reduce waste powder in powder spraying processing

Waste powder is can't use at the scene of powder, in large (small) cyclone separation system of waste powder inside bucket of powder, the powder particle size is relatively small, charging effect is bad, it's hard to spray on the workpiece. We know that powder coatings have high production efficiency, excellent film coating performance, good ecological environment protection and outstanding economy. In the production, equipment manufacturers through the improvement of electrostatic equipment spray gun and equipment technology to improve the dead corner powder rate. There are many factors influencing the powder rate on the dead corner of powder coatings, which can be divided into external factors and internal factors. External factors include the elbow size and shape of the coated workpiece, customer powder spraying system, powder spraying construction personnel, etc., powder formulation adjustment and operational factors in the spraying process, which are internal factors.

The scrap rate is the percentage of waste powder = the percentage of waste powder/total used component.

What factors will affect the waste powder rate?

1. Particle size ratio of new powder

2. Air injection ratio

3. Frequency of color change

4. Powder rate

5. Separation efficiency of cyclone device

6. Integrity of the system

7. The primary qualification rate of spraying products is also a factor to reduce the waste powder

The particle size ratio of the new powder is determined by the powder factory. The powder factory needs to provide the particle size distribution map of the new powder to minimize the proportion of the fine powder.

Reduce the proportion of air blast, because when air blast is 0% powder rate, the powder is separated by cyclone devicewhile powder sprayingprocessing. The method is to change the hanging mode or increase the clearance automatic control system.

Every change of color will lose 10 kilograms of powder, reasonable production plan, can reduce a change of color, can reduce more than 10 kilograms of waste powder!

Increase the powder powder powder rate, also can reduce the waste powder. The powder rate is related to the electrostatic system of spray gun and the good or bad grounding of workpiece. The separation efficiency of cyclone devices is determined by the equipment manufacturer. High separation rate will reduce the amount of waste powder. The integrity of the system is also an important factor affecting the rate of waste powder. Timely maintenance of the system is also important in spraying! Increasing the qualified rate of spray products can reduce the amount of recycled powder, which can also reduce the proportion of waste powder.

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June 20, 2018

The importance of quality control for thermal spraying coating

Bonding strength of coating including the cohesive strength between the coating particles (spray coating bonding strength itself) and the bonding strength between coating and substrate materials (adhesion), generally the coating cohesion strength is greater than the bonding strength of coating and matrix. Usually only the binding strength between the coating and the substrate is tested. Binding strength refers to the force required for the coating to peel off the bonding surface of the matrix material per unit area between the coating and the substrate. It is a very important index to detect coating performance. If the binding strength is too small, light will cause the coating life to decrease, causing early failure, heavy will cause the coating partial peeling, peeling can not be used. Coating quality is directly related to the success of the application of surface engineering technology, related to the parts, and even the whole life of equipment and safety performance, so the surface of coating quality testing is very necessary. There are three basic methods for the quality inspection of coating surface: appearance inspection, non-destructive inspection and destructive sampling inspection.

The purpose of using thermal spray coating for the purpose of appearance inspection is to protect the base material and achieve some functional indexes, and almost all of them require certain appearance quality, and no obvious defects are allowed. In addition, to some extent, the appearance inspection can also infer the defects in the coating process. Therefore, the appearance inspection of coating is the most basic and common inspection content. If the appearance is unqualified, it is not necessary to test other items.

Inspection of surface coatings with the naked eye or a low power magnifying glass is one of the most basic methods. For some thicker thermal coatings, surface defects such as unevenness, porosity, oxidation, peeling, splash, surface crack and peeling can be observed with the naked eye.

Thermal spray coatings can also be tested by nondestructive testing (NDT). NDT technology is under the condition of no damage is detected objects, using materials internal structural abnormalities or defects caused by the heat, sound, light, the change of the reaction, such as electric and magnetic, to detect all kinds of engineering materials, parts, components of the internal and surface defects, and the type of defect, nature, quantity, shape, location, size, distribution and its changes in judgment and evaluation.

There are various kinds of NDT technology of ultrasonic testing, radiographic testing, eddy current testing, magnetic particle testing, penetrant testing is one of five most commonly used and most mature detection method, usually referred to as the conventional nondestructive testing technology. Besides the five conventional NDT technology, application and some more other NDT techniques, such as neutron gamma ray detection technology, X-ray computer tomography technology, acoustic emission testing technology, noise detection diagnosis technology, the magneto-elastic detection technology (magnetic Barkhausen noise testing, acoustic emission testing), leakage magnetic field detection technology, industrial endoscope inspection technology, laser holographic technology, microwave detecting technology and leakage detecting technology, etc. NDT methods has its applicable scope, each other can't replace each other, no one is everything, any kind of detection method is impossible to give all the information you need. Therefore, one or two NDT techniques must be selected according to different defect types.
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June 07, 2018

Matters needing attention of grinding and polishing of carbide saw blade

The heat treatment method used in domestic carbide saw blades is generally the salt bath method. After the heat treatment, the oxidation layer is thicker and the deformation of the saw blade is large. When the surface of the saw blade is taper, the oxide layer is not completely worn to make the saw blade undurable. The hardness of ordinary quenching is not good. Sometimes the hardness of the finished product is low, and it is not durable. Sometimes the toughness is low and the blade is easy to explode. The overseas saw blade quenching is treated by vacuum treatment and has the function of preventing oxidation. After quenching, the deformation of the saw blade is small, the difficulty of correcting the stress is reduced, and the saw blade has a small deflection value. According to the incomplete data, the deformation of the vacuum heat treatment is less than half of the ordinary quenching. The stability and repeatability of the vacuum heat treatment are good, and the quality fluctuation of the cutting tool is avoided by the conventional heat treatment. The high speed steel saw blade in vacuum heat treatment can obviously improve the toughness and fatigue strength of the cutting tool, so the saw blade is not easily detonated when cutting fast feed. The surface hardness error of the saws is controlled within one degree, which lays a solid foundation for the performance of the cutting process.

An important index affecting the effect of high-speed saw blade is the geometric taper design of the saw blade. The grinding taper of the saw blade in China is used for the grinding equipment used in the lathe modification. Usually the saw blade is erected, then the single surface is worn and then processed on the other side according to the experience. This way can not guarantee the consistency of the two sides of the saw blade, thus increasing the friction coefficient and cutting resistance of the saw blade, and affecting the cutting life. The special equipment used in foreign countries is made of special equipment. The saw blade is used for flat processing. Through the control system, the taper grinding operation of the saw blade will be operated automatically until it is completed. It can fully guarantee the consistency of the two tapers, thus ensuring the low friction coefficient and cutting resistance of the saw blade, which is beneficial to the cuttings and obviously improves the service life of the saw blade. And cut the verticality.

The aluminum alloy saw blade is used for the aluminum alloy material, sawing, milling, and cutting the groove. In the process of processing, it is in the polishing liquid rich in abrasive, and can be pressed on the workpiece. It can rotate at high speed.

1. It is necessary to finish polishing and polishing under light pressure, especially when polishing pre hard steel and fine grinding paste. When polishing with #8000 grinding paste, the load is 100~200g/cm2, but it is difficult to keep the precision of the load.

2. When the polishing process is stopped, it is very important to make sure that the workpiece is clean and carefully removed from all abrasive and lubricants. Then a layer of mould antirust coating should be sprayed on the surface.

3, each polishing time should not be too long, the shorter the time, the better the function. If the polishing process is too long, it will form "orange peel" and "pitting corrosion".

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June 04, 2018

The reasons for the main use of ceramic end mills for rough machining

"It is not only feasible to imagine the processing of nickel - chromium alloy 718 and other high temperature alloys (HRSAs) at the speed of processing aluminum," said Melissa Singher, a senior product engineer at the U. S.. The secret lies in the SX9 ceramic end mills produced by the cutting tool manufacturer.

Singher said: "in the use of SX9 mills to process superalloys (such as Inco 718 and 625), it is suggested that the speed is 2000 to 3000 SFM (surface feed / minute), with a minimum speed of about 1000 SFM. For example, in general, the minimum speed of a 0.5 inch vertical milling cutter is 8000r/min. To obtain the best performance, the spindle speed should be within the range of 15000 to 20000r/min. The feed rate is usually 0.0011 to 0.0013 IPT (inch / every blade), and the feed speed should exceed 100 ipm/min (inch / minute) when the 4 edge end milling cutter is used for 20000r/min cutting.

Singher says that a large number of spatters with spark chips will be quickly ignited, and the cutters will quickly prepare for the chip recycling, which is a very effective metal cutting process. It is worth noting that under proper machining technology, the working life of the tool can be as long as 10-25min. Singher explains that SX9 is a kind of SiAlON or silicon aluminum nitride ceramics, which ingeniously combines the strength of silicon nitride with the heat resistance and wear resistance of alumina. It is reported that the cutting edge design can withstand the extreme heat and pressure generated by high-speed machining of HRSA.

Singher added that working hardening is a common phenomenon at such a high cutting speed. This is also the reason why the end mills are mainly used for rough machining. Therefore, a cemented carbide end mill with a diameter of at least 0.3 cm (0.012 inches) is usually required for finishing. Here are some basic rules of thumb for SiAlON end mills.

Because of the high temperature, the continuous tool path can reduce the thermal shock of the tool.

When machining core, the inclination angle of 1.5 degree and 50% of conventional feed speed should be used.

Ceramic end mills are not suitable for machining titanium materials because the heat generated during processing will produce adverse reactions to the material.

Use the 6 edge end mill instead of the 4 edge milling cutter as far as possible to maximize productivity.

In addition, high speed and high balance hydraulic or heat shrinkable chuck or shaft should be selected as far as possible. No cutting fluid is used, instead of direct injection of a chuck with a strong convective air, which can prevent the expansion of a large amount of cutting heat produced during the process.

Finally, although the price of the ceramic cutter is much higher than that of the high quality hard alloy, the higher productivity in the use of the ceramic end mills is easy to balance the cost increase caused by the price.

Singher said: "because of the intense competition atmosphere in the engine parts industry, we have seen that the first and two tier sub contractors are very interested in this product. These companies really see their potential productivity of 15-40 times higher than that of carbide end mills, thus greatly reducing the manufacturing time of complex HRSA parts.

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May 29, 2018

What should I pay attention to when buying metal circular saw blade

Metal circular saw blade is a very important part of cutting equipment, the factors to consider when choosing to buy has a lot of, especially the stability of the cutting and quality, and the most important is the wastage of the cutting, it is closely connected with production profit and quality.

What specific matters should enterprises pay attention to when purchasing?

Selection of various parameters

Metal circular saw blade of any kind of specification has the specific sawing parameters and the corresponding sawing objects. When selecting, it is necessary to clearly understand the sawing materials.

1. Select the number of teeth of metal circular saw blade

The number of teeth is determined according to the materials and equipment of sawing, such as hollow pipe, wall thickness, diameter, etc. A lot of people may think that more teeth is better, but that's not the case.

2. Selection of blade diameter

The diameter of metal circular saw blade needs to be related to the cut material. First, the cut material is determined, then the suitable equipment is selected, and finally, the size of saw blade is selected according to the above situation.

3. Selection of types

Different kinds of metal circular saw blade, the cutting effect is also different, such as high speed steel saw blade, the cutting pipe effect is very good, of course, also can cut iron, copper, stainless steel, aluminum, etc.; The tungsten carbide saw blade is specially used for sawing wood and aluminum profiles, and finally cold saw blade, which is currently a kind of saw blade for high speed metal circular saw machine.

4. Thickness selection

As for the thickness of saw blade, it cannot be said that the thinner the better. Too thin will lead to instability, and too thick will lead to more serious loss of saw cutting.

Quality selection

When purchasing metal circular saw pieces, the most important part is quality. How long is the service life? What is the cost of a single saw cut? How stable is the sawing? Wait is all we need to consider.

Followed by the brand, the brand can represent the quality and service, again good a saw blade, it is impossible to do without any problem, which requires the service to support, there is no perfect service, the user will not buy at ease.

The last is the integrity of an enterprise, there is no good faith again good product can't go to work with, there are too many uncertain factors, metal circular saw blade is a kind of consumables, often can buy used, I don't believe that a company like change suppliers, if the good faith, believe that the quality of metal circular saw blade also not bad.

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May 25, 2018

Failure reason analysis of cemented carbide cutting picks

Cemented carbide cutting picks are generally divided into two types: cutter teeth (also called radial teeth) and pick teeth (also called tangential teeth).
The pick shape cutter tooth structure is simple, can click on the coal, turning deep, automatic sharpening, often in the course of work keep sharp teeth, coal winning machine load is relatively stable, so than knife cut tooth less energy consumption, long life, and small amount of coal dust, coal quantity is big, suitable for use in hard coal.

In a spiral drum coal mining machine, the gear cutting motion on the spiral drum is the combined motion of the rotation of the spiral drum and the horizontal swing of the cutter arm.

Trajectory for plane of cycloid, this work is divided into a cone, while working as picks wedge into the coal and rock, carbide cutter tooth wedge into the coal and rock in an instant, tooth cone surface of coal and rock pressure exceeds the compressive strength of the coal, the coal and rock crushing, as the pick shape of the cutter tooth wedge, the tension of coal rock mass is more and more big, until pick shape cutter teeth around the segment from the coal and rock breaking down.

The cutting teeth bear high pressure stress, shear stress and impact load when cutting coal rock. Coal hardness is not high, but there are coal gangue and other hard mineral aggregate, and in the process of coal mining and drilling, cutting tooth temperatures will rise sharply, leading to tooth top material softening, accelerate the failure process of the cutter tooth.

Cutter tooth in the process of work, the abrasive (gangue, etc) between the cutter tooth surface and produce larger compressive stress, with sharp edges and has a right Angle abrasive cutting cutter tooth surface formation micro cutting. If the grinding grain is not sharp enough or the Angle is not appropriate, the furrow will be forced out on the surface of the cutter tooth.

With the extension of cutter tooth working time, the abrasive surface of cemented carbide cutting picks push repeatedly, severe plastic deformation of the flow, make the surface of the lower interact, increase plastic deformation dislocation density in the area, surface crack, crack extension, foliated chip cutter tooth surface formation.

And corrosive medium exist in the coal seam and cutter tooth surface chemical reaction caused by the surface material corrosion, mechanical performance, and reduce the surface metal bonding force with substrate material, speed up the cutter tooth material surface wear.

In addition, when cutting tooth cutting coal and rock, bear the impact load of high intermittent, under the action of impact load, the cutting tooth surface harder micro convex point deformation, repeatedly squeezed in nearby soft surface to produce plastic flow and in cutting tooth surface formation accumulation, again and again of elastic-plastic deformation, and the dislocation concentrated, which in turn micro cracks appear on the surface transverse. After wear, the area of the cutting part increases, which increases the cutting resistance and reduces the cutting strength.

When the cutter head is worn to a certain extent, the carbide tip will fall off. The cutting teeth after the tip of the hard alloy teeth have been completely invalid. A large number of statistical analysis showed that the failure modes in accordance with the degree of order are: cutting teeth tooth head wear after cemented carbide tooth loss, broken tooth, tooth body bent or broken, the cutting tooth tooth head wear failure of tooth loss about 85%.

So, in order to improve the service life of cemented carbide cutting picks, first of all to ensure gear tooth surface has enough head of wear-resisting, corrosion resistant, shock resistance, at the same time increase the cutting tooth the tooth body strong toughness (using biya cutter tooth processing equipment, cutting teeth, welding equipment, cutting gear quenching equipment), can effectively extend the service life of cutting teeth.
Related link:
www.wococarbide.com/Transaction/en_information.html

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May 18, 2018

Optimum design of cemented carbide cutting tools

To reduce the manufacturing cost of cemented carbide cutting tools, can control the tolerance zone of the product, for the law Angle is greater than the sharp edge of product design of protective units, straight negative Angle blade design around the size can be directly mould pressing M class precision grade level, combined with modern high precision mold manufacturing technology and precision pressing technology, the material cost and artificial cost, machine cost three aspects comprehensive save the purpose of the cemented carbide product manufacturing cost by 1% ~ 3.5%.
Ever since the first pieces of cemented carbide cutting blades, since its launch in 1927, in order to optimize the blade cutting performance, relevant enterprises in the field of metal cutting has been constantly developing innovative blade geometry and into crumb structure. These design innovations, along with the continuous improvement of the matrix materials, make it possible to make the workpiece materials with higher hardness and higher strength.
The continuous efforts to optimize the cutting process complement the technological progress of machine tools which can improve the processing speed. At the same time, the performance advantage of the modern machining center also puts forward higher requirements for tool manufacturers. Now, they must provide more advanced tool and blade geometry to meet the requirement of metal removal. In addition, the price of hard alloy is rising rapidly worldwide, which puts a lot of pressure on the cost and benefit of the tool manufacturer to develop the product.
These two factors contribute to the emergence of innovative tool products and extend their cutting performance advantages to a wider range of processing areas. These innovative tools can greatly improve the feed rate, reduce the cutting force and save cutting fluid, making it suitable for the modern golden cutting machine with fast speed and light frame structure.
Reliable grip of blade
In the cutting process, it is possible to shift the blade under the action of cutting force to ensure that its automatic clamping position has become one of the main factors that affect the cutting performance of the tool. It is not surprising, then, that many tool makers are investing a lot of resources to optimize the blade grip technology.
Iscar company developed a blade clamping mechanism can reliable clamping has double negative prismatic shape after the double-edge blade of cemented carbide cutting tools, the dovetail cutter holder and the surface of the blade after a prismatic shape can prevent the blade under the effect of cutting force up, cock to ensure with double dovetail prismatic blade of the knife after the correct orientation and firm clamping.
In order to effectively improve the productivity and profitability of machining, now of the indexable insert is used in a variety of optimized geometric blade and the blade clamping mechanism, in order to ensure accurate cutting Angle, good chip control and processing stability of surface quality, reliable, and the use of the latest possibility of substrate material processing all types of workpiece materials.
Finally, if a blade does not reach optimal cutting performance, some evidence can be found to help determine the solution. Using a magnifying glass to carefully observe the blade's cutting edge reveals the essence of the problem. If the inspection indicates that the blade has obvious abrasive wear or slight deformation, it indicates that the blade has a low hardness and needs to be replaced with a higher hardness number. If the blade is broken and the cutting edge appears small, it may be necessary to switch to a lower hardness and better toughness. By understanding how cutting blades are made of, and how for a specific processing customized blades of different grades, you can take a variety of targeted measures, to improve the machining efficiency and reduce cost.

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May 17, 2018

Design and improvement of tungsten carbide boring bar with chip removal

Tungsten carbide boring bar is one kind of boring tool, usually round handle, also has larger workpiece use square tool pole, the most commonly used place is the inner hole processing, expanding hole, copying shape and so on. One or two cutting parts, specially designed for rough machining, semi-finishing or finishing cutting tools for existing holes. Boring tool can be used in boring machine, lathe or milling machine.
The machining process includes the machining and semi-finishing of the hole in the blind hole, which can only be solved by the inner chip deep hole boring tool. In the production site, there are the following disadvantages of the deep hole boring cutter with embedded carbide inside the carbide, which is narrow, and the chip is not smooth and easy to be blocked. The support is easy to wear, the diameter is easy to change; The size of the cutter is large and significant. Therefore, it is necessary to improve the deep hole boring tool in the series.
Whether the product structure and production feature, when processing need to follow the following principles: for processing tolerance zone, code-named H11 high strength alloy steel and high-strength aluminum alloy cylindrical deep hole parts as the main processing objects, and determine the application of deep hole boring cutter size and other main parts of the diameter size; From the existing machine tools in the factory, the size of the connecting part is unified, and the cutter bar size is reduced. The hard alloy blade adopts the general model and number of the national standard.
Design structure improvement
Chip in deep hole boring cutter is a kind of single edge cutting tool, cutting through the boring cutter and cutter bar inside the hollow out, is mainly used to expand the existing hole hole or blind hole, steps and fix its axis is not straight. Chip in deep hole boring cutter has the following characteristics: 1. cemented carbide welding blade on the blade or the knife pad, briquetting and screw compression in the blade head, welded blade not replaced, blade wear can be replaced after installation; 2. the hard alloy guide bar through cant take briquetting pressure and fixed on the boring cutter body, and the cutting plane across 90 degrees and lower differ with cutting edge installation groove, and cooling fluid pressure for lift force generated by offsetting radial and tangential cutting force, the layout and structure of single edge cutting force along the cutting edge is round shape; The tungsten carbide boring bar body is connected by single rectangle thread and cutter bar.
The welding structure of the traditional boring tool is made of cemented carbide blade. Remove the supporting part of the bakelite, adopt the lengthened hard alloy guide strip, and the guide and support function, the cutter body structure is simple, enhance the durability. Expand the chip removal channel to eliminate the blockage and remove the debris.
It is proved by repeated practice on the production site that the formation of cuttings and the effect of cuttings are directly related to the life and quality of the boring cutter. The main factors that influence the cuttings are the physical mechanical properties of the processed materials, the geometrical parameters of the tool and the cutting amount. After determining the machining object, the size of the cutting table of the boring cutter and the size of the walking knife are the main functions.

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May 11, 2018

Many cemented carbide indexable tools are gradually replacing the forming tool

In some cases, the repair of a indexable insert may not be worth the cost. EMUGE provides repair services for its own taps, end mills and thread mills. Although the tap can be resharpened, its geometric shape is much more complex than other tools such as the drill. The inconsistency between the new tool and the repaired tool is one of the reasons for the problem. However, there are also large parts (such as the oil field blowout preventer with a diameter greater than 25mm) that is often used to process the repaired tap. Much depends on the user and the processing technology. One of the key tricks of tool repair is to know when to stop using fixed tools. Everyone's situation is different. One auto parts manufacturer USES a tap to fix the taps for 2,000 to 3,000 holes. Each tap can be reused three times. But if he USES the tap to complete the damage and delivers the repair, the taps may only be able to process another 1,000 holes. Some users will stop using the tool before it breaks or the cutting edge is seriously damaged and will be sent to repair. This should be done for any tool that intends to repair reuse. If the tool is repaired before the insert is broken or badly worn, it is necessary to remove less of the tool material in the regrinding process.

In some cases, many indexable tools are gradually replacing the forming tool. Due to the transposition function, the initial purchase price of this tool is also quite high, but the user does not have to pay the cost of repairing the tool. In the case of conditional permission, the end milling cutter may replace the whole round milling cutter.

Although it has a good application prospect, it still has reason to choose the solid carbide bit when machining the high quality hole with high surface finish and dimension precision. The design ofindexable insertor replaceable cutter head is increasing, but the solid carbide round tool still has its use. Another limiting factor for indexable cutting tools is the need for space for clamping inserts. When the tool diameter is less than a certain limit, the integral tool is the only feasible solution.

Another key factor in increasing tool repair costs is the need to track and deliver the additional tooling inventory required in the repair process. This increases the complexity of managing tool repair processes, especially in complex high-tech production environments. First, there is a logistics process for collecting, packaging, and sending the tools to be repaired and to recover the repaired tools. Then you need to determine the difference of the repaired tool. In addition, it is essential that they be properly tracked or classified so that they can be used correctly for processing. In particular, the vertical milling cutter, for example, will be sent to repair by a vertical milling cutter with a diameter of 12.7mm. The diameter of the cutter returned after the repair may be reduced by 0.51mm or 0.76mm. In order to guarantee the machining quality, the offset of CNC machine tool must be adjusted appropriately.

Related link: http://www.wococarbide.com/Library/libraryinfo/id/1217

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May 07, 2018

Matters to be paid attention to when grinding carbide cutter

In the process of cutting, the cutting edge of the carbide cutter will be blunt and the cutting ability will be lost because of the sharp friction and the cutting heat of the knife surface. Only through grinding can the cutting edge sharp and the correct angle of the cutter be restored. Therefore, the lathe operator should not only know the cutting principle, but also select the tool angle knowledge reasonably.

When the carbide cutter is blunt, it must be sharpened to restore its reasonable shape and angle. The cutter is usually sharpened on a sand turbine. Grinding high speed steel tool with white alumina grinding wheel, grinding carbide turning tool with green silicon carbide grinding wheel.

When the carbide cutter is regrinding, it is possible to grind the relevant blade surface according to the wear condition of the carbide cutter. The general sequence of tool sharpening is as follows: grinding surface, grinding side, flank face, grinding surface and grinding wheel. When the carbide cutter is sharpened, it is also used to grind each knife face with oil stone. Thus, the service life of the turning tool can be effectively improved and the roughness of the workpiece surface can be reduced.

The position and method of grinding the carbide cutter are:

People stand on the side of the grinder to prevent debris from flying when it breaks.

The opening distance between the two hands is held, and the two elbow is clamped to the waist to reduce the jitter during grinding.

When grinding the main and secondary cutter surface, the carbide cutter should be placed in the horizontal center of the grinding wheel. The tip of the knife should be slightly upwards about 3 ~8 degrees, and the wheel should move horizontally in the left and right direction after contact with the grinding wheel. When the carbide cutter is away from the grinding wheel, the carbide cutter needs to be lifted up to prevent the sharpened blade from being bruised by the grinding wheel.

When grinding the cutter face, the end of the cutter head deviates from the angle of a main deflection to the left side, and the angle of the cutter shaft tail crosses the right side to a side deflection angle when grinding the flank face.

When the grinding tool tip is circular, the front end of the carbide cutter is usually supported by the left hand as the fulcrum, and the tail of the carbide cutter is rotated with the right hand.

When grinding the tool, we should pay attention to the following items:

(1) when sharpening, the two hands should stabilize the carbide cutter, and the cutter bar depends on the bracket, so that the worn surface is lightly attached to the grinding wheel. Do not exert too much force to avoid crushing the wheel and cause accidents.

(2) the sharpening tool should be moved around the circumference of the grinding wheel to make the grinding wheel uniform and no grooves. Avoid rough grinding of the carbide cutter on the two side of the grinding wheel, so that the wheel is forced to swing, beat, or even break.

(3) when the cutter head is heated, it should be cooled by water so as to avoid the annealing and softening of the cutter head due to the high temperature rise. When grinding carbide tools, the blade should not be covered with water so as to prevent the blade from being chilled and crack.

(4) do not stand on the front side of the grinding wheel to sharpen the carbide cutter to prevent the operator from being injured when the wheel is broken.

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May 04, 2018

tungsten carbide drilling reamer

The high hardness and high strength of the workpiece are the main reasons for the cutting edge and short life of tungsten carbide drilling reamer blade. It is mainly reflected in the following aspects:

(1) the main deflection Angle of the reamer cutting cone is small, the cutting width is large, and the radial cutting force is large when cutting, so it is very easy to cause the blade of the reamer blade.

(2) in the process of quenching steel, the front Angle of the reamer should be negative, which will increase the strength of the blade and reduce the collapse.

(3) replace the material of cemented carbide blade, preferably select ultra-fine grain carbide blade to ensure high hardness and good strength.

(4) strict control of hinged margin. Because the ream allowance is too big, will increase each blade cutting load, destroyed the stability of the process of ream, and increased the cutting heat, make the diameter of the reamer swell, aperture has been expanding, the surface roughness of the processing quality is poor.

Major changes are made in the following aspects:

(1) adjust the size of the reamer properly. When using tungsten carbide drilling reamer machining hardened steel hinge holes have a certain amount of shrinkage, depending on the size of the hole, shrinkage rate is generally 0.005 ~ 0.02 mm, so the reamer tolerance zone up appropriately, and keep the correction part of the front end with 6 mm long cylindrical blade, the backend to make 0.01 mm inverted cone, in order to reduce friction on the surface of the blade and is ream, try to avoid surface damage.

(2) shorten the length of the reamer to improve the overall rigidity of the reamer. In the case of ensuring the depth of the reaming, shorten the length of the reamer properly, and keep the distance between 15 ~ 20mm from the end surface of the spindle.

(3) appropriately increase the diameter of the blade section to improve the rigidity of the reamer, while at the same time, in the external grinding process, the knife will be rounded to the outside, ensuring the coaxial degree of the blade and Morse taper shank.

(4) increasing the reamer cutting cones Angle, increased from the original 15 ° to 30 °, and radial cutting force to reduce the cutting width.

(5) the reamer Angle from 3 ° to 10 ° before (in front of the blade offset 1 mm), can protect the blade reamer blade does not crack.

(6) after reamer cylindrical blade Angle from 15 ° to 8 °, and retain cylindrical blade with 0.1 ~ 0.15 mm.

(7) in cutting cone grinding reamer law Angle, back from the original tool grinding process to shovel grinding process, namely blade back to curve, can increase the strength of the reamer cutting cones, reduce the reamer blade cutter tooth crack. Reamer cutting Angle of cone method backward shoulds not be too much at the same time, choose to 7 ° when machining hardened steel, shovel mill when actual value is 1.1 K.

( change the carbide welding blade model from E518 to E315, and increase the blade thickness from 1.5mm to 2mm to improve the blade strength.

(9) carbide blade material is changed from YG8 to YS8 or YT726 suitable for processing quenching steel. That is, the blade hardness is increased from 89HRC to 92.5hrc, which greatly extends the life of reamer.

(10) properly reduce the hinged margin and reduce the cutting load. Increase the original value of 11.7mm hinged bottom hole to the value of 11.8mm, that is, the hinged margin will be reduced from 0.3mm to 0.2mm, so as to improve the quality of reaming holes.

By users to use the improved reamer, after more than 20 sets of mold in continuous processing, remove the blade reamer observation, no collapse edge, only slight traces of wear, still can continue to use, reamer life was improved.

For the improvement of carbide taper shank machine reamer, the following requirements should be paid attention to in the process of quenching steel: it is an important condition for cutting and quenching steel. It is necessary to have reasonable geometrical parameters of the tool to effectively perform the cutting performance of the tool material. According to the physical and mechanical properties of tool material and workpiece material, the workpiece shape, the rigidity of the process system and the machining allowance are used to select the reasonable cutting amount.


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May 02, 2018

The price of cemented carbide raw materials continues to rise

Cemented carbide raw material prices have been rising in 2017, caused the carbide product production enterprise production costs have risen sharply, the annual carbide product price rose, cemented carbide production enterprises generally face income drops, even without the embarrassing situation. At present, hard alloy production enterprises have been unable to bear the soaring cost of raw materials. At the end of the year, many hard alloy manufacturers are forced to have no choice but to raise the price of products.

 

In the price of raw materials, tungsten and cobalt rose the most

 

Tungsten carbide powder, the main raw material of cemented carbide, has risen from about 180 yuan/kg at the beginning of the year to about 269 yuan/kg at the end of this year, and the price has soared more than 50% in the whole year. Tungsten powder is also at the beginning of the year from 2017 181 yuan/kg all the way up, early September when the highest even up to nearly 300 yuan/kg, regeneration of the price of tungsten carbide powder is from the beginning of the end of 158 yuan/kg has been up to now 208 yuan/kg, rose by nearly 35%.

 

Tungsten, another major material for cemented carbide, has also risen sharply. The price of cobalt almost doubled in 2017, according to metal bulletin, trading at around $29 a pound. According to ubs, cobalt was the best base metal in 2017.

 

Of course, there are many reasons for the price increase, and the increase of raw material costs is only one of the reasons. The increase in operating costs and labor costs is also an important reason for the increase. In recent years, with the upgrading of the consumer market, the demand for high quality products has increased, while high-quality products are often accompanied by high costs, and the price increases will naturally follow.

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April 26, 2018

Development and trend analysis of China's powder metallurgy industry in 2018

Powder metallurgy is preparing or metal powder with metal powder (or the mixture of metal powder and nonmetal powder) as raw materials manufacturing metal materials, composite materials and various types of products, technology belongs to the comprehensive technology of multidisciplinary cross, involves the chemical industry, metallurgy, material preparation, thermal, mechanical, disciplines such as automatic control technology. The process of powder metallurgy includes four steps: powder forming, forming, sintering and reprocessing.

Powder metallurgy technology has a series of advantages such as energy saving, saving material, excellent performance, high precision and good stability. It is suitable for mass production. As a result of the differences with ordinary processes, powder metallurgy has a unique chemical composition and mechanical and physical properties, which are not obtained by traditional melting methods. The application of powder metallurgy technology can be directly made into porous, semi-dense or fully dense materials and products. In addition, some preparation in traditional foundry method and machining methods of complex materials and components also available powder metallurgy technology, and powder metallurgy technology is now widely industry attention.

In recent years, powder metallurgy industry developing rapidly, especially in automobile industry, machinery manufacturing, metal industry, aerospace, instruments and meters, hardware tools, construction machinery, electronic appliances and the rapid development of high-tech industries, for the powder metallurgy industry has brought the bigger development opportunities. At present, powder metallurgy products are mainly used in automobiles, home appliances, power tools, motorcycles, agricultural machinery and engineering machinery industries, such as the development of downstream industries will drive the development of the upstream industry, the capacity of the whole industry constantly expanding.

From the perspective of a world of powder metallurgy mechanical parts industry, powder metallurgy parts industry is the biggest sales market, at the same time, the field of powder metallurgy parts technology, highest quality requirements of the market. In Europe and Japan and other developed countries, the industry demand for powder metallurgy parts accounted for about 90% of the powder metallurgy market, the powder metallurgy auto parts of North America accounted for more than 80% of the powder metallurgy industry market. From the perspective of the powder metallurgy mechanical parts industry of China, powder metallurgy parts industry the main market is the refrigerator compressor industry, air conditioning compressor industry, motorcycle industry, gradually evolved into the auto industry.

At present, the domestic powder metallurgy market scale is 6.4 billion yuan, among which the auto powder metallurgy parts are around 4 billion yuan. With the wide application of powder metallurgy products: assumes that China's auto sales remain 5% growth, auto bike usage 15 kg of powder metallurgy parts, is expected in 2020 China's automobile powder metallurgy market capacity is expected to reach 14 billion yuan. European and American car companies produce an average of 20kg of powder metallurgy parts per vehicle; The average car produced by a Japanese car company USES about 9kg of powder metallurgy parts. In China, the average use of powder metallurgy parts is only about 5kg. Powder metallurgy industry in China in the future expansion space is larger, as China's automobile market volume growth, further improve bike usage and powder metallurgy parts, powder metallurgy market is expected to usher in a more rapid development.

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April 24, 2018

Experts predict that China's tungsten carbide industry will meet the "golden decade"

In the tungsten industry, the tungsten consumption of tungsten carbide accounts for about 50% of the total consumption of tungsten. Therefore, the development of cemented carbide industry plays an important role in the development of tungsten carbide tool ,China cemented carbide industry starts from the construction of zhuzhou cemented carbide factory in the early 1950 s, more than 50 years, from scratch, development, obtained the accomplishments that have astonished the world, has become the world's largest cemented carbide manufacturing countries, but the overall technology especially high value added products production, there is still a large gap compared with the advanced world level.
Since the financial crisis in 2008, China's tungsten carbide industry has entered a trough, especially in 2015, and it has almost hit rock bottom. But the more difficult it is, the more confident the industry experts are, zhang zhongjian, chairman of the tungsten carbide branch of the China tungsten industry association, said at the time that the industry would be dead. Sure enough, the industry began to grow in recovery in 2016, with explosive growth starting in 2017. According to statistics, compared with 2008, the output of cemented carbide will increase by 100%, sales revenue will increase by 75%, the profit will increase by 136% (the profit in 2017 will be the highest in the last 10 years), and the export volume will increase by 99%.
The 19th big, the socialism with Chinese characteristics into the new era, and high quality development stage of China's economy, Zhang Zhongjian argues that it brings to the cemented carbide industry huge opportunities for development, mainly manifested in two aspects, one is machining solutions to industry growth, one is energy, mineral resources exploitation, infrastructure construction with cemented carbide tools and steady growth.
Mechanical processing solution is cemented carbide industry core product, is the key of the industrial development, in the face of it is automobile manufacturing, CNC machine tools, aerospace, military industry, machinery, mould processing, 3 c industry processing, ships and ocean engineering equipment, and other areas of the manufacturing process. Mr Zhang says the industry's prospects for the next 10 years related to mechanical processing solutions are bright.
Like car manufacturing. According to dong Yang, vice President of the China automobile association, China's auto industry could reach 50 million vehicles in the next few years, so the number of CNC blades in the auto industry alone can reach 4 to 500 million.
Such as mechanical mold manufacturing. China is a major manufacturer and consumer of mechanical moulds. In the next 10 years, the total output value of China's mould industry is estimated to be about 500 billion yuan.
Like the Chinese aviation industry. In the next five years, China's new general aircraft is expected to be 3, 000, and commercial aircraft will begin to be produced, and various types of military aircraft will be replaced.

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