Posted by: hannahgwendolyn at 10:00 AM | No Comments | Add Comment
Post contains 694 words, total size 5 kb.

Posted by: hannahgwendolyn at 09:59 AM | No Comments | Add Comment
Post contains 487 words, total size 3 kb.

Based on the complex shape of carbide ball milling cutter, it is difficult to prepare by traditional machining method, and the waste of materials will be caused. Preparation of Harbin university of science and technology to the preparation of the micro texture of carbide end milling ball head can get higher dimensional accuracy, but also create unique blade on the knife before - contact model, can be achieved on the contact area to print out from 50 microns to 200 microns in diameter pit micro texture arrays, and dimension precision is very high.

With the formation of tungsten carbide balls head on compared to the method of texture, Harbin university of technology in addition to being able to create complex shapes of ball end milling cutter, also can in front of the ball head milling cutter blade knife - crumbs contact region more precise pits were dimension micro texture arrays, which can achieve cut the knife when cutting chip - crumbs contact area, to reduce the knife - friction coefficient of contact area, to reduce tool wear.

Ball tooth bit is a kind of rock drill bit which appears with the development of hydraulic rock drill. It has high working efficiency, fast drilling speed and saves auxiliary working time. It is suitable for fast driving of high-power rock drill. Ball tooth drill bit in the drilling of brittle rock, with the use of high power hydraulic drill, the biggest characteristic is fast and stable chisel, drill bit grinding cycle is long. Since the 1970s, porter company has been researching and developing ball-tooth bit as its main product. Now, the sales volume of various ball-tooth bit accounts for 60% ~ 70% of the total production of the ball-tooth bit. In 1968, after adopting the precision hot-setting technology, sandvik company developed a series of ball-tooth drill bits with large and small diameter for percussion drilling, and recommended the ball-tooth drill head as the "ideal supporting drilling tool for hydraulic rock drill". In the next few years, ball tooth bit will take more and more proportion in rock drilling bit market.

After the 1980s, China began to pay attention to the research and development of ball tooth bit. In the 1990s, the quantity and quality of domestic ball-tooth drill bits have been greatly developed (table 5), and the export volume is also increasing year by year. A batch of ball tooth bit manufacturers with larger output and better quality appeared, tungsten carbide ball tooth bit produced by lianhuashan takes a large proportion in the export bit.In the production process of ball tooth bit, high quality carbides of shell steel, high precision processing equipment, reasonable processing technology and heat treatment technology are the preconditions to ensure product quality. The ball tooth bit steel used in foreign brazing tool factory mainly USES chrome-nickel-molybdenum steel or silicon-manganese chrome-nickel-molybdenum steel. In the hard alloy aspect, each factory selects the high quality hard alloy, like Sweden DP series alloy, Germany GT series alloy and so on.

for more details: wococarbide.com

Posted by: hannahgwendolyn at 09:42 AM | No Comments | Add Comment
Post contains 511 words, total size 3 kb.

This kind of tungsten carbide sealing ring is made of the same material, the performance of the material is uniform in all parts of the sealing ring, there is no composite sealing ring leakage and separation defects, there is no possibility of electrochemical corrosion. Most soft rings are made of graphite, while hard rings can be made of various alloy steels, such as bearing steel (GCr9), high-speed steel (W18Cr4V) and other alloy steels (such as 1140Cr, 3Cr13, etc.), and some are made of alloy cast iron. (such as silicon, chromium and nickel cast iron). These materials should be supplemented by appropriate heat treatment processes to improve their hardness and wear resistance. These materials cost less and, if used properly, have a longer life. In order to further improve the hardness and prolong the service life, cemented carbide can be used. The commonly used cemented carbide is cobalt-based tungsten carbide with better performance but high price. The price of steel-bonded carbides is lower. In order to improve the corrosion resistance in the corrosive medium, there are nickel-based tungsten carbide, and hastelloy alloy has higher corrosion resistance, but the price is expensive. In addition, there are seals made of silicon carbide and other ceramic materials.

Combination seal ring

Tungsten carbide and other materials have excellent properties, but the high price, difficult processing, limited its use. In order to solve this contradiction, tungsten carbide seal ring  appeared. The sealing end face is made of cemented carbide, and the base of the sealing ring (called ring seat) is made of ordinary materials. In order to solve the connection and sealing between cemented carbide ring and ring seat, there are four kinds of combined sealing rings, which are hot-mounted type, ring-type, welded type and brazing type.

Sealing ring requirements:

Sealing ring is the general name of moving ring and static ring (the same below), is the most important component of mechanical seal. Seal ring to a large extent determines the mechanical seal performance and life, so it put forward some requirements.

1. Sufficient strength and stiffness. Under working conditions (such as pressure, temperature and sliding speed, etc.) is not damaged, deformation should be as small as possible, working conditions fluctuations can still maintain the sealing.

2. The sealing end face shall have sufficient strength and corrosion resistance to ensure a satisfactory service life under working conditions.

3, sealing ring application of good heat shock resistance. Therefore, the material is required to have a higher thermal conductivity coefficient and a smaller linear expansion coefficient, so that it will not crack under thermal shock.

4, sealing ring matching should have a small coefficient of friction and good self-lubrication, sealing ring material and bee fluid should have a good wetting. If short dry friction occurs in the work, the sealing end face will not be damaged.

5, sealing ring should strive to be simple, symmetrical and give priority to the overall structure. Can also be used in combination (such as mount type) sealing ring, as far as possible to avoid the use of sealing end spray structure.

6, sealing ring to be easy to manufacture, installation and maintenance to be convenient, low price.

Seal ring is a ring seal with a gap, by being compressed after the elastic and against the static parts of the inner hole wall sealing role. Sealing ring is a kind of ring seal with a gap, put it in the ring groove of the sleeve, the sleeve and the shaft rotate together, the sealing ring is pressed by the gap after the elastic and against the static part of the inner hole wall, can play a sealing role. All contact surfaces shall be hardened and polished. The sealing ring is made of wear-resisting cast iron containing chromium and can be used for sliding speed less than 100m/s; If the sliding speed is within the range of 60 ~ 80m/s, the sealing ring can also be made of tin bronze.

Related link:

http://www.wococarbide.com/Transaction/en_information.html

Posted by: hannahgwendolyn at 09:54 AM | No Comments | Add Comment
Post contains 664 words, total size 5 kb.

With the intensifying of market competition, domestic spraying industry production scale expands unceasingly, and powder coating without solvent and less pollution, saving energy and resources, reduce the labor intensity, and the characteristics of the coating of higher mechanical strength, leading to more and more with the process of the enterprise for powder coating industry, but due to the use of dangerous chemicals is more, there is no lack of among them many of the flammable and explosive, and spraying methods mostly adopt electrostatic spraying method, fluidized bed coating method, electrostatic fluidized bed method, electrostatic oscillation method, electrophoresis method and flame spraying method such as high-energy spraying powder method, so in theory, technical requirements on this, At the same time, there are three conditions of ignition source, air and combustible powder, which can easily cause explosion accident in the spraying workshop. The powder spraying accident is characterized by great destructive power, strong suddenness and great damage to human beings. The prevention and supervision of the accident will bring certain challenges to the safety production area.

China's spraying technology basically exists in the first and second industries, especially the manufacturing and construction industries in the second industry, such as machinery manufacturing, materials production and electrical equipment processing. At present, electrostatic spraying is the mainstream method in China. Taking this as an example, powder spraying technology is generally divided into three steps, namely pretreatment, electrostatic spraying and curing. Pre-treatment mainly includes oil removal, rust removal, phosphating (chromating) and passivation, etc. Common pre-treatment includes immersion type, spray type and waterfall type. Electrostatic spraying is the core of this process, which is generally carried out in a fixed electrostatic powder spraying system, which is mainly composed of a powder feeding device, a set or sets of electrostatic spraying guns, control devices, electrostatic generating devices (usually arranged in the electrostatic spraying gun) and a set of powder recycling devices. Solidification is generally carried out in the drying room, by passing the painted workpiece through the high temperature, so as to make the powder concentrate, level, and solidify the sprayed powder onto the surface of the workpiece.

Due to the different economic conditions of each manufacturer, the equipment used in the pretreatment, spraying and solidification production line is of different quality. Some of them buy individual pieces to assemble themselves; Some of them are designed and made by themselves, and the room where the process is built is also different. Even in the same industry, the process of powder size, spraying methods, production capacity, etc. In the process of production, disorderly equipment, if not strictly controlled, will face huge safety risks.

At present our country has set a safe operation for the coating industry regulations "coating operation safety regulations", a total of 12 of this series, powder spraying area for the layout of the powder and have strict requirements, not only the security objectives ofpowder coating industry, also for the future standard basis is provided for the development of the technology, the new starting point for further provide safe production level.

Related link:

http://www.wococarbide.com/Transaction/en_information.html

Posted by: hannahgwendolyn at 09:57 AM | No Comments | Add Comment
Post contains 516 words, total size 4 kb.

The process procedure of spray welding is basically the same as that of spraying. Spray welding has one - step and two - step process.

Attention should be paid before construction:

There is carburized or nitrided layer on the surface of the surface of the surface of the finished workpiece, which must be cleared when pretreatment;

(2) for general carbon steel workpiece preheating temperature 200 ~ 300 degrees and 350 ~ 400 degrees heat resistant austenitic steel. Preheat the flame with neutral or weak carbon flame. In addition, the thickness of spray coating is reduced by about 25% after remelting, which should be taken into account when measuring the thermal state after spray remelting.

one-shot

The one-step method is to spray one section and then melt another section. Can choose medium and small spray welding gun. After the workpiece preheating before spraying 0. 2 mm layer of protection, and the surface densification, prevent oxidation, spraying molten starting at one end, spray from 10 to 30 mm, to cover local heated to melt in order to start again when wet flow (can't) spray welding powder, melt and repeated, until it reaches the thickness, surface reflective "mirror", further extension, reached a surface covering all spray welding layers. If the thickness is insufficient, the thickness can be increased repeatedly. One-step method is suitable for small parts or small area spray welding.

Step two spray welding

The two-step method is to finish the coating layer before remelting it. Both spraying and remelting are used with high-power spray guns, such as sph-e spray and welding guns, to fully melt the alloy powder in the flame and generate plastic deformation of the deposited layer on the surface of the workpiece. Weak carbon flame is used when spraying iron base powder while neutral or weak carbon flame when using spraying welding powder and cobalt base powder.

The thickness of each layer of powder spraying is <0.2mm, and the repeated spraying reaches the remelting thickness. Generally, the remelting can be performed from 0.5-0.6mm. If the spray welding layer is required to be thicker, a remelting can not reach the requirements, several times of spraying and remelting.

Remelting is a key step of the two-step process, which takes place immediately after spraying. With a neutral flame or weak carbonizing flame of high power soft flame spray from about 20 ~ 30 mm, flame and surface Angle 60 ~ 75 degrees, start from about 30 mm from coating, appropriate master remelting speed, heat the coating, until a "mirror" reflective coating for degrees, and then go to the next part of remelting.

During remelting, overmelting (i.e. surface cracking) should be prevented, coating metal flows, or local heating time is too long to oxidize the surface. Multilayer remelting, the previous layer cooled to about 700 degrees, cleared surface slag, make secondary spray welding. Remelting should not exceed 3 times.

Cooling of workpiece. Medium and low carbon steel, low alloy steel workpiece and thin welding layer, simple shape of cast iron parts cool naturally in air. For iron parts with thick welding layer and complex shape, alloy steel parts with high content of manganese, copper and vanadium, and parts with high cold hardness, they should be buried in the pit of lime.

Related link:

http://www.wococarbide.com/Transaction/en_article_info/id/258.html

Posted by: hannahgwendolyn at 09:39 AM | No Comments | Add Comment
Post contains 551 words, total size 11 kb.

Among the nozzles, the tungsten carbide nozzles are the most durable and cost-effective. Cemented carbide nozzles are made from precision machineries and superhard alloy materials. The hardness of cemented carbide nozzle can reach 2300N/mm and HRA90 degree.

Cemented carbide nozzles are formed by hot pressing and sintering of hot straight holes and churns. In the process of machining, precision grinding and surface treatment must be achieved, and the roughness of hole is Ra0.1 and that of both ends R is Ra0.025. A scientific design with a radius of curvature at two entrances.

This design ensures smooth thread passage. The advantages of carbide-tipped nozzles are hardness, low density, abrasion resistance and corrosion resistance. So carbide-tipped nozzles are widely used in sandblasting and shot blasting equipment, ensuring the product is used for a long time in the best air and abrasive.

The shape of the carbide nozzle bore determines the flow pattern. Carbide nozzles usually have a straight hole and a small hole.

Straight orifice nozzle for the airflow field or the internal airflow work to form a sealed airflow pattern. This is conducive to the realization of small work, used for cleaning parts, weld molding, cleaning handrails, steps, lattice, or stone carving and other aspects.

The pile-nozzles form a full air flow pattern, increasing the grinding speed by up to 100% for a given pressure. Venturi nozzles are the best choice for increasing productivity on larger airflow surfaces. Compared with the straight hole nozzle, the long hill nozzle can increase the productivity by 40% when the abrasive consumption is about 40% less.

Cemented carbide nozzles are also called cemented carbide nozzles, tungsten steel nozzles, tungsten carbide nozzles, etc.cemented carbide nozzles production and processing customization, specializing in the soldering of tin ball laser, supporting equipment customers require custom-made processing of tungsten steel nozzles.

Cemented carbide nozzles are also called tungsten carbide nozzles. Commonly used is cemented carbide, tungsten cobalt alloy, tungsten cobalt alloy is a refractory metal tungsten carbide as hard phase, with transition metals (Co, etc.) as the binder phase, using powder metallurgy technology preparation production of superhard materials, has high strength, high hardness, wear resistance, corrosion resistance, high temperature resistant, and the advantages of small linear expansion coefficient, extensive application in many industrial production and processing operations, is one of the excellent tool material. Because its main component is tungsten carbide, foreign product demand is often called tungsten carbide product, we call it cemented carbide product.

Good physical stability, especially when high temperature and corrosion resistance require long-term operation, the excellent performance of tungsten carbide nozzles, cemented carbide nozzle and precise suction nozzle is beyond the reach of other tool materials. Cemented carbide produced by powder metallurgy production process is a typical representative of super hard metal because of its high hardness, high strength and good toughness, and is a good choice of wear-resistant parts.

Related link:

http://www.wococarbide.com/Transaction/en_information.html

Posted by: hannahgwendolyn at 09:35 AM | No Comments | Add Comment
Post contains 489 words, total size 4 kb.

Background technology:

In everyday life, we have a nozzle on the faucet, on the one hand, have the effect of make water to the nozzle, on the other hand the internal filter can also filter effect, because the water is the direct impact of filter, time is long water flow in the dirt and gravel will filter blockage, and we sometimes when mixing cold and hot water, can produce nozzle flow of water is as cold and general heat mixing unevenly, so designing a tungsten carbide nozzle, aiming at the above problems is very necessary.

Technical implementation elements:

In view of the above problems, the utility model provides tungsten carbide nozzles, the utility model by adding the mixing with rotating filter can mix hot and cold water rapidly, at the same time can also be fall into filter dirt and sediment left edge of the web site, to avoid congestion, between which can effectively solve the problem of technical background.

To achieve the above purpose, the utility model provides the following technical scheme: a kind of tungsten carbide nozzles, including nozzle and nozzle, the nozzle and nozzle described connected, as described in the bottom of the nozzle is equipped with filter, filter unit including fixed ring frame and screen pack, described the fixed ring frame has raised, net is described in the outer ring is equipped with card slot, described in the card slot card and on the trunk, described in the filter connected with center rod end, described the center stem with stirring piece, described the center rod at the other end connected with drive motor, the drive motor on the nozzle.

As an optimal technical scheme of the utility model, the fixing ring frame is connected with the nozzle through the thread.

As an optimal technical scheme of the utility model, the length of the stirring plate is smaller than the radius of the sprinkler head.

As an optimal technical scheme of the utility model, the driving motor is provided with a protective case.

As a preferred technical scheme of the utility model, the stirring plate and the filter net are made of stainless steel.

Compared with the existing technology, the beneficial effect of the utility model is: The utility model through tungsten carbide nozzles with fixed ring frame with filter, filter with fixed ring is to link with convex card and form through the card slot, not rigid fixed connection, so the filter can rotate, rod through the drive motor drive center can achieve filter and rotate at the same time, of the stir when water flow for the nozzle, as the filter is rotating, can take advantage of the centrifugal force will be on the dirt or mud into the edge of the above, in addition when cold water and hot water reaches the nozzle flow, mixing, stirring slice can mix cold water and hot water quickly, there will be no general hot water general conditions in the cold water, The utility model can mix hot water and cold water rapidly through the added stirring plate and rotating filter net, and at the same time can throw the dirt and sediment into the filter net to the edge to avoid the blockage among them. The overall design is simple and practical with low cost and broad market prospect.

Related link:

http://www.wococarbide.com/Transaction/en_information.html

Posted by: hannahgwendolyn at 09:10 AM | No Comments | Add Comment
Post contains 561 words, total size 9 kb.

Tungsten carbide powder (WC) is the main raw material for the production of cemented carbides. Known as, tungsten carbide powder black hexagonal crystal, metal luster, hardness similar to diamond, is a good conductor of electricity and heat. Melting point 2870 degrees, boiling point 6000 degrees, relative density 15.63 (18 degrees). Tungsten carbide is insoluble in water, hydrochloric acid and sulfuric acid. Pure tungsten carbide is fragile. If mixed with a small amount of metals such as titanium and cobalt, brittleness can be reduced. Tungsten carbide, used as a cutting tool for steel, is often added with titanium carbide, tantalum carbide, or a mixture of them, to enhance the ability to resist explosion. Tungsten carbide is chemically stable.

A method for preparingcast tungsten carbide powder is characterized by the following steps:

(1) in 200 ~ 250 g block graphite, puts the crusher in the crushing and 150 mesh sieve, graphite powder, graphite powder and put in 1 l beaker, and to add 600 ~ 700 ml beaker mass fraction is 85% sulfuric acid, stirring evenly mixed, and then to join in a beaker of 7 ~ 8 g potassium permanganate, stirring and heating heating to 70 ~ 70 degrees, 1 ~ 2 h reaction;

(2) after the reaction, then to join in a beaker mixture quality 15 ~ 20% mass fraction is 17% hydrogen peroxide solution, stirring evenly mixed, and put the beaker in 0 ~ 2 degrees ice water bath, freezing crystallization 50 to 55 min after the crystallization of mixture in the centrifuge in centrifugal separation, the control speed is 200 ~ 220 r/min, the centrifugal 40 ~ 45 min, stay after the separation, collection of centrifugal, will collect the centrifugal content on temperature is 60 ~ 70 degrees oven drying after 1 ~ 2 h, then put in ball mill ball mill and 170 mesh sieve, get nano graphite powder;

(3) in 200 ~ 250 g, metal tungsten to place it in the furnace and zhongtong into the calciner to calcine furnace volume two-thirds of oxygen, stay bubbled into complete, calcination, control the calcination temperature is 800 ~ 850 degrees, calcination, after 1 ~ 2 h using spray gun to the preparation of nano graphite powder injection to calcine furnace, control air injection rate is 0.20 ~ 0.25 kg/s.

(4) at the same time, access to the calcination furnace burning furnace, a third volume of hydrogen stay bubbled into complete, improve the calcination furnace temperature to 1200 ~ 1350 degrees, calcined reaction after 2 ~ 3 h, using liquid nitrogen to make it cool within 50 ~ 60 s to the 500 ~ 600 degrees, the heat preservation after 10 ~ 15 min, cool again to 100 ~ 250 degrees, heat preservation after 7 ~ 8 min, finally to 30 ~ 40 degrees, cooling heat preservation after 10 ~ 15 min, then put in mill grinding and 200 mesh sieve, can cast tungsten carbide powder preparation.

Posted by: hannahgwendolyn at 09:55 AM | No Comments | Add Comment
Post contains 495 words, total size 3 kb.

GF (glass fiber) is often needed to enhance the mechanical properties of PC materials in the actual production process of enterprises. As for the mold adopting the hot runner system, the wear of the nozzle of the hot runner system will be accelerated due to the addition of glass fiber in PC, resulting in a greatly reduced product qualification rate. This paper discusses the advantages of the hot runner system oftungsten carbide nozzlein the actual production aiming at the application of the hot runner system of tungsten carbide nozzle in the actual production. Mould is the basic industry of our country national economy, it is the important basic craft equipment of manufacturing industry. Mold manufacturing has an important position in the manufacturing industry, making the mold manufacturing capacity and technical level become an important standard to measure the national manufacturing level and innovation capacity. With the continuous progress of the society and the continuous development of the economy, a variety of commodities are produced continuously, most of which depend on the diversification of the mold. With the use of plastic products in society more and more extensive injection mold has become the most widely used mold type. With the continuous development of the society, people's requirements for environmental protection and plastic products are higher and higher. Therefore, mold adopting heat flow system should be born and widely used. The mold mainly adopts the hot runner system has the following advantages: (1) shortening the casting cycle. Because there is no restriction on the cooling time of the runner system, the parts can be produced in time after being formed and solidified. Many thin-walled parts produced by hot runner moulds can take less than 5 seconds to shape. (2) saving plastic materials. Because there is no cold runner in the pure hot runner mould, there is no production waste. This is particularly significant for reducing raw material costs. In fact, the main manufacturers of hot runner in the world are in the era of high prices of roommates and plastic raw materials have been rapidly developed. Because of the efficient way to reduce waste and cost of hot runner technology. (3) reduce waste and improve product quality. The temperature of plastic melt is controlled accurately in the system of hot runner mould. The plastic can flow into the cavities in a more uniform state to produce parts of uniform quality. In addition, the quality of the sprue is good, the residual stress is low and the deformation of the part is small. Therefore, many high quality products on the market are produced by hot runner mold. (4) eliminate subsequent processes, which is conducive to production automation. After the hot runner mold is formed, the finished product, without the need to trim the gate and recycle and process the cold runner, is conducive to the realization of production automation. (5) expand the scope of injection molding process application. Many advanced plastic forming processes are developed on the basis of hot runner technology.

The material of this product is PC, and glass fiber (GF) needs to be added to enhance the mechanical properties of the product. The product appearance cannot leave the mark of glue inlet, and the raw material of the product cannot be reused. It is well known that PC is a colorless or yellowish thermoplastic engineering plastic without fineness, odorless, non-toxic and high transparency. It has excellent physical and mechanical properties, good heat resistance and low temperature resistance, and stable mechanical properties and dimensional stability in a wide range of temperature. The most important processing method of this material is injection molding. When PC is using hot runner mould for injection molding, BECU is usually used for the material of the nozzle tip of hot runner. In general, no problems will occur in the production process. According to the requirements of the customer, the appearance of the product cannot leave gate marks and the raw materials cannot be reused, which decides that the mold should be designed and manufactured by using the hot runner system. Due to the influence of glass fiber added to PC material, the heat flow nozzle tip of the mold is made of BECU material. However, it was found in the production process that there was no problem with the products of the mold at the beginning of production. After a period of production, the products began to fail in large areas, and no obvious improvement was made after the equipment debugging. Thus it can be seen that the problem should be above the mold. It was found that the reason was that the nozzle tip of the hot flow nozzle was worn seriously, resulting in quality problems.

Related article:

http://www.wococarbide.com/Transaction/en_article_info/id/466.html

Posted by: hannahgwendolyn at 10:00 AM | No Comments | Add Comment
Post contains 796 words, total size 5 kb.

Posted by: hannahgwendolyn at 09:56 AM | No Comments | Add Comment
Post contains 418 words, total size 3 kb.

General circular turning is to process the outer surface of the part to obtain the required dimensional position precision and surface quality. Ordinary cylindrical turning tool according to the cutting tool Angle 95 , 90 , 75 , 60 , 45 , 90 , 95Angle of cutting tool cutting large axial force, radial force is small, suitable for turning a slender shaft parts, 75 , 60 , 45 Angle cutter for cutting short cylindrical parts, including 45 master Angle 45 chamfer cutter can be turning. Negative Anglecarbideblade cutting tool economy is better than the Angle of the blade cutting tool, and is sharp edge, the Angle of the blade tool cutting light, only is Angle of the blade size is generally small, only suitable for small back turning, feed processing, and negative Angle blade size can be made larger, can be used in the large amount of turning, feed processing, also is better than the Angle of the blade tip strength (same shape, size, arc blade tip). Different blade intensity, effective cutting blade length and number of available blade tip are different.

Face turning refers to the main cutting edge on the face of the workpiece cutting processing.

1. Matters needing attention when facing the car

(1) the tool tip of the turning tool should be aligned with the workpiece center to avoid leaving a convex platform at the end face center.

(2) the end face of the offset cutter, when the amount of the back knife is large, it is easy to tie the knife. Selection of the amount of back knife ap: ap=0.5 ~ 3mm for rough turning,

(3) the diameter of the end face changes from the outside to the center, and cutting speed also changes. When calculating cutting speed, it must be calculated according to the maximum diameter of the end face.

(4) for the end face with a larger diameter, if there is a concave core or convex belly, check the tool and square tool holder, and whether the big slide is locked. In order to make the cutting tool horizontal feed accurately, the middle sliding plate should be tightened on the bed body, with small tool holder adjust the amount of the back knife.

(5) when the quality of end face is high, the last knife should be cut outward from the center.

2. Quality analysis of car end face

(1) uneven end face, protruding and concave phenomenon or "small head" left in the center of end face; The reason is that the tool is not installed correctly, the tip of the tool is not aligned with the workpiece center, the amount of the back knife is too large, and the lathe has gap slide movement.

(2) surface roughness difference. The reason is that carbide cutting tool is not sharp, the manual moving blade is uneven or too fast, and the automatic feeding quantity is not selected properly.

(3) the turning characteristics of inner hole are: it is not convenient to observe the chip removal in the semi-closed state, which affects the processing quality. Deep hole cutting often causes the vibration of carbide blade, making the cutting edge wear fast. The length of the workpiece and the size of the selected tool bar will not affect the tool's overhang during the turning of the outer circle, so it can bear the cutting force generated during the processing. When boring and turning the inner hole, the depth of the hole determines the overhang.

Posted by: hannahgwendolyn at 09:37 AM | No Comments | Add Comment
Post contains 585 words, total size 4 kb.

Posted by: hannahgwendolyn at 09:48 AM | No Comments | Add Comment
Post contains 581 words, total size 4 kb.

With the rapid development of industry, modern high speed machining and automatic machine tools have put forward higher requirements on the performance and stability of cutter. Cemented carbide is widely used in the production of blades due to its advantages of high hardness, wear resistance, strength and toughness, heat resistance and corrosion resistance. The production process of cemented carbide blade (tool) is complex, and the critical process in sand blasting process directly affects the adhesion strength and appearance phase of blade (tool) coating, and plays a decisive role in the service life of cemented carbide blade (tool).

We know that the blade (blade) is an important tool in the machining process. Today, we are going to learn about the classification of blades and the manufacturing process of cemented carbide blades.

A series of transposable square shoulder milling cutters, including multi-function blades. The blade contains four double-sided tip blades. The blade has excellent complete cutting edge and maximizes machining efficiency in various square shoulder milling and milling slots.

The demand of the industry now makes people use more difficult materials to guarantee the mechanical strength at high temperature. Therefore, in order to improve production efficiency, higher processing stability is needed. Tool integration is another issue in the effort to improve tool economy and improve tool life management, in which manufacturers are using a single tool for a variety of different processing applications.

The blade contains a specially designed gap Angle of the rear cutter surface to meet the requirements of slope milling, screw interpolation and other 3 dimensional milling, while ensuring the integrity of the strong tip of the negative Angle blade. The main blade features a large front Angle design that allows free cutting without compromising the integrity of the cutting edge.

The new blades include AH3135 for steel and stainless steel processing and AH120 for cast iron. The characteristics of the two materials are that they have high anti-collapse ability to ensure the processing stability and reduce the premature failure of the blade and blade.

Product advantages:

Multi-function: because the innovative design of the gap Angle of the rear cutter surface can meet the requirements of 3d machining;

Increase efficiency: the integrity of the cutting edge and anti-collapse damage to achieve large feed processing;

Machining stability: the optimized front blade has a lower processing load of machine tool spindle.

Posted by: hannahgwendolyn at 09:39 AM | No Comments | Add Comment
Post contains 396 words, total size 8 kb.

The design idea of layered composite ceramics is to add soft and high-temperature materials to brittle ceramics to make layered composite ceramics. Although its composition is simple, the fine composite structure ensures the excellent mechanical properties of materials. Layered composite is a kind of bionic design. The characteristics of these bionic materials can not only improve the toughness of ceramics from the component design, but also design new materials from the macroscopic structure, forming the synergistic effect of multistage toughening mechanism of different scales, which is a new idea of reinforcing and toughening ceramics. At present, the commonly used bionic structure has bamboo and wood structure, shell structure and so on.

Different from traditional methods to improve material properties, such as eliminating defects, the toughening mechanism of layered composite ceramics is independent of strength and defects, and is a defect resistance mechanism of energy absorption and dissipation mechanism. According to the strength of interface, layered composite ceramics can be divided into weak interface, strong interface and ductile interface materials. Different interface combinations correspond to different toughening mechanisms.

A weak interlayer is introduced between two layers of high-strength ceramic substrates. When the stress of layered composite ceramics with a weak interface reaches a certain intensity, the crack grows to form a micro crack, and the micro crack will deflect or laminate along the weak interface, releasing energy in the process of crack growth and achieving the effect of material toughening.

This kind of layeredcomposite ceramics is characterized by a large increase in fracture toughness and no sudden fracture of the material. However, due to the existence of weak interlayers, the overall strength of the material is reduced.

Strong interfacial bond is a kind of interfacial binding force to form mutual restraint between layers, which is beneficial to form strong residual stress in the material. If the residual stress is artificially designed, it becomes prestressed. Strong toughening mechanism of interfacial residual stress by the use of layered composite ceramic substrate layer and interlayer between the thermal expansion coefficient, shrinkage rate does not match, or a layer of phase transformation, adjust their respective layer, layer thickness, the surface layer to produce appropriate compressive stress, thus inhibiting the occurrence and spread of cracks, the material strength, toughness, surface microhardness increase method.

This kind of layered composite ceramics has strong - strong multilayer interface characteristics, which is usually obtained by interlacing and layer by layer superposition of two kinds of strong monomers or composite ceramics.

Ductile interlayer crack toughening is to use the plastic deformation of ductile layer to consume and absorb energy, and form a bridge at the end of the crack to prevent the crack expansion, so as to improve the fracture toughness of the material. Ductility layer can exist in the state of continuous layer and choose organics such as metal or resin with strong plastic deformation ability.

Related link:

http://www.wococarbide.com/Library/index.html

Posted by: hannahgwendolyn at 09:29 AM | No Comments | Add Comment
Post contains 485 words, total size 4 kb.

Posted by: hannahgwendolyn at 09:54 AM | No Comments | Add Comment
Post contains 526 words, total size 3 kb.

Prealloyed powder high pressure atomization method is according to the designed ratio of the tire body, the metal of various components is smelted into alloy in advance before sintering, and then atomized powder is sprayed to obtain the required particle size of the tire body powder. Water atomization or gas atomization can be used in atomization. The gas can be atomized by air, nitrogen or argon gas. The cooling rate is fast. Metal powder of certain size and shape (spherical or irregular shape) can be obtained by adjusting nozzle geometry and controlling atomizing medium and other process parameters.

The prealloyed powder used in ceramic saw blade mainly includes fe-cu-ni-sn, fe-cu-co-sn, fe-cu-co and cu-sn series. This kind of pre-mixed gold powder is characterized by low sintering temperature, fine sintering structure, moderate hardness of the tire body, moderate bending strength and low abrasion of the tire body.

The hardness of the body of the ceramic scraper is high, generally greater than HRB95. Coarse knife requires good sharpness and long service life. It is widely used as the basic alloy fe-cu series, which is characterized by good compaction degree of sintering tissue, high hardness and long service life. Fe-cu-ni-sn series alloy powder is widely used in fine knives with both sharpness and service life. It is characterized by low sintering temperature, high hardness, high densification degree and good abrasion resistance. At the same time, the wear compatibility between the tire body and the diamond is good, and the diamond can keep the proper blade height in the working process.

Cobalt has many superior properties. Such as holding force to diamond, good sintering property, products with high density and good compatibility with other metal powder and diamond tools for the alloy powder has been widely applied, but because of its expensive price, supply channel is not stable, and in the aerospace, defense industry, carbide and the strategic resource status in the battery industry, so in recent years, the development and production of diamond tools pre alloy powder is mainly focused on the generation of cobalt alloy powders, it has the following features:

(1) the prealloyed powder develops towards low cobalt and cobalt free tyres in terms of chemical composition, so as to further reduce cost and improve cost performance.

(2) the usage performance of prealloyed powder is further improved and improved. For example, various methods are adopted to improve the density, impact strength and hardness of pre-mixed gold powder, reduce its sintering temperature, reduce the production of brittle phase, and improve the uniformity of its components.

(3) the product is developed to complete prealloying of the fetal body. Unlike pre-mixed gold powder, which is mainly produced on the basis of pre-mixed gold powder in the early stage of its development, the newly developed pre-mixed gold powder is for specific purposes and does not need to add other powder to fully pre-mixed gold powder body.

Related link:

http://www.wococarbide.com/Library/index.html

Posted by: hannahgwendolyn at 09:54 AM | No Comments | Add Comment
Post contains 490 words, total size 4 kb.

Posted by: hannahgwendolyn at 09:40 AM | No Comments | Add Comment
Post contains 579 words, total size 4 kb.

Cemented carbide saw blade is consumable product, have its service life, a lot of enterprises think when cutting off the processing, if the use period is not reached, will not be replaced, can not be used directly! Indeed, this is what all businesses are doing, thinking it's normal and reasonable, but not knowing it's a very lazy way of doing it.

If the service life of carbide saw blade is 40 square meters, it should be replaced when it is cut to 20 square meters. In this way, after rest, at least 30 square meters can be cut.The saw blade that cut acrylic USES and the saw blade that cut aluminium alloy is used commonly in the construction of modern society civilization construction, building site, door window factory, radiator factory, furniture factory, handicraft factory, plank factory is indispensable tool, a lot of customers can have such doubt, saw blade is general? Cutting acrylic with the saw blade can be used to cutting aluminum alloy, the same cutting aluminum alloy saw blade saw blade can be used to cut acrylic,? The answer is no, no, yes, really can't, some customers only one machine, too trouble in saw blade, cutting aluminum alloy with a special cutting aluminum alloy saw blade, cutting acrylic and used special acrylic cutting saw blade, to switch to delay time, affect production, today will give you analyze, why cutting acrylic saw blade and cutting aluminum alloy saw blade can not be universal.

First cutting acrylic and cutting aluminum alloy saw blade, because the acrylic and aluminum alloy material is different, different features, so acrylic and aluminum alloy saw blade saw blade with alloy is different, is not of the cutting tools, acrylic is crisp, aluminum alloy strength is big, cause choose different alloy saw blade, second, the density is different, acrylic saw blades and aluminum alloy saw blade tooth shape, acrylic saw blade use most tooth shape is flat teeth around around, aluminum alloy saw blade is ladder flat teeth, do not understand the customer is a large and a small tooth shape, that is also true, if with acrylic cutting saws for cutting aluminum alloy is easy to break the teeth, General aluminum alloy saw blade is relatively cheap, this is also with acrylic crisp and difficult to cut, easy to burst the edge has a relationship, very high requirements for the saw blade. The aluminium alloy that cut is different, domestic besides a few quality do not pass a level, other cut effect is good, can achieve the effect that does not have burr.

With all that said, it should be clear to you that saw blades made of different materials should not be mixed, nor should they be cut by one blade for convenience and money. So different saw pieces should be special saw pieces, the saw pieces of the acrylic is to cut the acrylic, the aluminum alloy saw pieces is to cut the aluminum alloy can be used, good care, saw pieces can be used for a long time, the cutting effect is good.

Posted by: hannahgwendolyn at 09:29 AM | No Comments | Add Comment
Post contains 522 words, total size 6 kb.

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.

Posted by: hannahgwendolyn at 10:06 AM | No Comments | Add Comment
Post contains 572 words, total size 4 kb.