March 01, 2018
Tungsten carbide center drill is used for machining center hole on the end face of shaft and other parts. It is used for the prefabrication of hole processing to guide the hole machining and reduce the error. The center drill is light and defecate.
More and more processing workshops are replacing gun drilling with solid carbide bits. Some solid carbide drill manufacturers think, this kind of bit performance advantage for those who are on his lathe with gun drill deep hole processing, or the deep hole processing tasks subcontract processing workshops of gun drill manufacturers have more and more attractive. However, compared with the tungsten carbide center drill, which is usually made of hard alloy or hardened high speed steel drill point, hardened steel shank and straight slot, there are some limitations in the overall hard alloy deep hole drill. For example, their borehole depth limit (dimensioning) is 40 times the aperture, while a gun drill can easily drill a deep hole with a depth of 50 times the aperture.
There are two types of tungsten carbide center drill: type A: center drill with no cone, type B: center drill with A cone, and A center hole with A diameter of 1~10mm, usually with A center drill without A cone (type A); In order to avoid the damage of the 60-degree centering cone, the center drill with the cone is generally adopted.
Tungsten carbide center hole is the positioning base of the shaft type workpiece mounted on the top. Center hole of 60 degrees taper hole to match the top 60 degrees on the cone; A small round hole in the inner side to ensure that the conical hole is matched with the top cone, and a small amount of lubricating oil (butter) can be stored. The central holes are commonly found in type A and type B. Type A center hole only 60 degrees taper hole. Type B center hole outside the 120 degrees cone cone is also called the protection, to protect the 60 degrees taper hole edge is not being damaged. Type A and type B center holes are machined on lathe or special machine tool respectively with corresponding center. Before machining center hole, the end face of the shaft should be leveled to prevent the center from breaking. The peak Angle of the standard center drill is generally 118 degrees.
Instructions for use of alloy center drill
1. The user must choose the model of the center drill according to the holes of the processed parts and the size of the straight hole.
2. The hardness of the workpiece is best between 170-200hb.
3. Before using the tool, it must be cleaned and anti-rust grease, so as to prevent the cutting chip from sticking to the blade and affecting the performance.
4. The surface of the machined workpiece should be flat, and there should be no sand or hard points, so as to avoid the cutting of the tool.
5. The center drill before drilling should reach the desired position accuracy.
6. Cutting amount
7. Cutting fluid: select different cutting fluid according to the processing object, and the cooling should be sufficient.
8. Matters needing attention: the abnormal situation should be stopped immediately during processing, and the cause can be processed after checking the cause; Pay attention to the abrasion of the cutting edge; After using the tool, clean the oil and keep it properly.
February 09, 2018
In order to ensure the quality of welding, a careful inspection should be carried out to find out the cause of defects. Before the inspection, the tool should be sandblasted or gently ground to adhere to the solder and impurities on the blade surface, and clean with kerosene.
Check items and requirements.
Check weld strength
After the green silicon carbide grinding wheel is used to grind the back of the cutter, check the thickness of the solder layer, and the thickness is below 0.15mm. No holes and solder defects can be found at the base of the blade, and the welding seam should not be more than 10% of the total length of the weld. If there is a hole, the blade will fall off when cutting.
Check the position of the blade in the knife slot.
If the blade is misaligned and sagging exceeds the technical conditions, rewelding shall be performed.
Check welding strength
Use a wooden hammer or a copper hammer to hit the blade with medium strength or with a hammer with a strong stroke. The blade is not removed from the knife slot to be qualified. Check the welding strength of cemented carbide welding blade, not necessarily each inspection, also use spot check method.
Check the blade flatness
If there are obvious pits on the blade, the blade should be overheated and deformed, and the welding blade should be fired.
Check the crack
When the blade is cleaned by kerosene, if the blade is cracked, the kerosene seeps into the crack and the black line is visible to the naked eye. It can also be observed with a magnifying glass of 10-40 times.
Check the blade crack, and also use color flaw detection: 65% of kerosene, 30% of transformer oil and 5% turpentine solution, slightly more Sudan red. Put tool blade part in 10 to 15 minutes in the solution, then use clean water, coated with a layer of clay (kaolin), the surface was observed after baking thousand, if there is crack on the cemented carbide welding blade, then the color of the solution was revealed on clay, with the naked eye can see. The cracked blade cannot be used and needs to be resoldered.
In addition to the several commonly used car 7J welding methods mentioned above, there are methods such as oil protection, electric furnace, forge furnace and brazing furnace with reducing gas.
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February 01, 2018
Wire drawing die of the scope of application is very extensive, mainly for the drawing bar, wire rod, wire, pipe and other linear difficult processing object, steel, copper, tungsten, molybdenum and other metal and alloy material of drawing processing. As the material that can use tungsten carbide wire drawing die, must have enough strength and wear resistance. The molds of tungsten carbide wire drawing dies are basically WC-Co cemented carbide. WC-Co carbide is composed of very hard elements (tungsten carbide) sandwiched between very soft matrix (cobalt) layers. The most important element in cemented carbide is tungsten carbide. There is only a small amount of the matrix metal film, filled with the space of carbide grains. Since the thermal expansion properties of carbide and cobalt are different, when the matrix metal film is combined with hard particles, they are subjected to severe plastic constraints. This will increase the strength of the base metal and lead to embrittlement of the matrix metal. This actually determines the performance of the cemented carbide. At high temperature, tungsten carbide can still guarantee its hardness. When the temperature reaches 600 degrees, the hardness of cemented carbide can be the same as the hardness of high speed steel at room temperature. Hard metal has higher compressive strength than any kind of artificial material, and it also has high elasticity and rigidity modulus. Other properties of cemented carbide include thermal conductivity better than most steel and low friction coefficient. These characteristics are very important for the fabrication and processing of metal pipes.
The quality of tungsten carbide in tungsten carbide wire drawing dies plays an important role in the service life of wire drawing die. The design and manufacture of tungsten carbide wire drawing dies, if the service life is long, the maintenance is small, and the speed of drawing is improved, the following three problems must be solved:
1. The inlet cone and working cone are lengthened to establish a good lubrication pressure, while the lubricating cone Angle should be shortened appropriately.
2. The diameter belt must be straight, and its height should be reasonable.
3, work cone Angle and sizing belt junction should not have transition Angle, at least to minimize, typically less than 0.5 degree.
The tungsten carbide wire drawing mould is of high hardness, and the quality of the pipe is high and the surface roughness is low. At the same time, the wear resistance of tungsten carbide wire drawing die is good, the service life of die is long. The machining precision, durability and wear resistance of the tungsten carbide wire drawing die are better than that of ordinary pipe drawing dies.
Work drawing die is towards high strength, high hardness, high wear resistance, conforms to the requirements of the new technology and material emerge in endlessly, work drawing die greatly improve wear resistance, wear and damage time delay, obviously increasing life of drawing die, machining accuracy has improved. The application scope of drawing processing is gradually expanding, from coarse to fine specifications of pipes.
The physical and chemical properties of wire drawing die must meet the requirements of high hardness, impact resistance, wear resistance and low friction coefficient. In mass production, long life die materials should be selected, such as tungsten carbide, high strength and toughness, high wear-resistant mould steel (such as YG15, YG20). tungsten carbide has good polishing, low energy consumption, wear-resisting, high temperature resistance, good corrosion resistance, and its recyclable and other excellent properties, making it an important material for drawing mould.
January 24, 2018
Tungsten alloy plates are refractory metal, which have two-phase composites consisting of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe, some tungsten alloys also contain Co、Mo、Cr, etc. Tungsten alloy can be machined into various shapes, such as rods, cubes, blocks, bricks, rings, plates, etc.
Applications for Tungsten Alloy Plate:
1) Sports goods: Professional tungsten alloy plate for darts benchmarking. The to fall series: the bullet type, type water, pipe type, half water droplets type, type cylinder have.
2) Counterweight products: High-density tungsten alloy plates with counterweight series: with the balance of mechanical hammer; Fly hammer; Oil drilling counterweight rod; Darts rod; Golf counterweight piece; The car counterweight piece; mobile phones, game oscillator; aerospace the gyroscope; The pendulum clocks; counterweight balance ball; Shockproof tool rod.
tungsten alloy plate
3) Electrical material: electrical discharge machining of electrode and resistance welding electrode; high proportion electrical contacts, air circuit breaker in the contacts.
4) High temperature alloy heat sink: due to high temperature resistant and good thermal performance, electronics industry isswitching to tungsten alloy plates as heat sink materials.
Tungsten Alloy Plate Introduction
Tungsten Alloy Plates properties
1, Width*Length: (2.0-250.0mm)*(2.0-250.0mm)
2, Thickness: 2mm-15mm
3, Density: 15.8-18.75 g/cm3
4, Composition: W content: 85-99%, W-Ni-Fe, W-Ni-Cu
5, Surface: Sintering surface, Forged surface, Ground surface
Tungsten alloy plates are produced by good processing property billets and special cold and hot rolling technology; they can be used to make tungsten target, tungsten heat elements, tungsten radiation shields and tungsten boats for electronics, lightening, electro-vacuum industries.
Tungsten alloy plates play very important role in manufacturing of collimator for nuclear medicine, nuclear research, geologging and homeland security. These materials provide reliable protection against X-rays and gamma radiation.
The thickness of the tungsten alloy plate is as follows:
Foil - a thickness of less than 0.005 in. (0.13 mm).
Plate - thickness greater than or equal to 0.188 inches (4.75 mm).
Sheet - thickness less than or equal to 0.187 inches (4.75 mm) to greater than or equal to 0.005 inches (0.13 mm)
January 19, 2018
January 18, 2018
January 16, 2018
January 12, 2018
Tungsten carbide geological mining tools are made of WC-Co alloy. According different geological mining tools, different rock hardness, or in different parts of the geological mining tools, requiring an average WC grain and containing cobalt are also different . Tungsten carbide geological mining tools material in addition to the requirements of high purity, and require WC, C particles are generally coarse, for WC total carbon and free carbon, there are strict requirements range. tungsten carbide geological mining tools has formed a relatively stable and mature production technology, widely used as a molding agent paraffin wax, vacuum dewaxing (and hydrogen dewaxing) and vacuum sintering.
Tungsten carbide geological mining tools take on the important task of engineering geology, oil exploration, mining and civil construction. Tungsten carbide geological mining tools as traditional geological mining tools, geological mining tools by the complex role of impact and abrasion, harsh working conditions, there are at least wear mine rock form more than four, namely: thermal fatigue wear, shock wear the shock of fatigue wear and abrasive wear. tungsten carbide geological mining tools compared with the general geological mining tools, have higher hardness, strength and toughness. tungsten carbide able to adapt to changing conditions better,and under the guarantee toughness does not fall have further improve the wear resistance of the alloy.
tungsten carbide bits as the common part of tungsten carbide geological mining tools, one tungsten carbide bit can replace 4 to 10 steel bits, its penetration rate twice as high, while the tungsten carbide drill bit replacement less often, improve production efficiency, perforation rate. Tooth tungsten carbide drill for, it is required to adapt to a variety of rock properties teeth, perforation rate, abrasion resistance, shock resistance, so as to achieve long service life. Tungsten carbide drill bit has become a major tool for high-efficiency perforated. Currently tungsten carbide geological mining tools for large and medium-sized open-air metal mines, especially for large open pit type non-ferrous metal perforation, tungsten carbide geological mining tools has broad prospects.
Selection of tungsten carbide geological mining tools
Tungsten carbide geological mining tools have high hardness and excellent wear resistance and heat resistance of some, but it is a very sensitive to surface cracks or defects, poor performance of the anti-shock cold quasi-brittle materials; its compressive strength is high, but the tensile strength is very low. Meanwhile, the stress concentration is also very sensitive. Selection of geological mining tools with tungsten carbide grade, should be the main consideration alloy shock resistance and abrasion resistance. Various items of property flexural strength, hardness, density, coercive force, fracture toughness, porosity, dirt degrees, the average grain size of tungsten tungsten carbide , etc., can reflect different aspects of shock resistance and wear resistance of the alloy.
Selection tungsten carbide geological mining tools, the shock of extremely hard rock and heavy drills big power should focus on the toughness of the tungsten carbide alloy, the choice of a higher amount of cobalt-containing tungsten carbide alloy grades; for hard and brittle, and the corrosive rock, should focused on the wear resistance of the tungsten carbide alloy, the choice of a slightly lower amount of cobalt tungsten carbide alloy grades; on the hard and medium hard rock below, should use low cobalt-containing, high hardness tungsten carbide alloy grades; for use under heavy mining coal mining tungsten carbide cutter used mainly to reduce the cobalt content increased, grain size so that the shock toughness of the alloy greatly improved flexural strength; for column teeth, cross, three-blade drill head is the choice of the cobalt-containing lower amounts of tungsten carbide .
January 11, 2018
January 04, 2018
Tungsten alloys can be made in various shapes, but the most commonly used shape is a round bar, which can be treated with thermal machinery to improve its mechanical properties. The tungsten alloy rotary forging stick is made of tungsten alloy rodsthrough forging, thus greatly increasing its tensile strength, and its strength is at least 1050 MB to 1200 MB. Tungsten alloy spinning rod is formed by extrusion and sintered tungsten carbide powder. Sizes range from 3mm to 50mm.
The tungsten alloy bars are mainly made from square and round tungsten alloys. The hollow tungsten alloy bar is one of the important types of tungsten alloy bars. Tungsten alloy rod machining process, tungsten alloy rod is hollowed out by a single point cutting tool, in order to realize a bigger hole, such as boring and artillery barrel diameter precision of hole or holes, it can also be used to cut a tapered hole.
Tungsten alloy bars can be divided into several types. At both ends of the tungsten carbide, this is just working. If the existing hole is a pass hole, it can be supported at one end and can be supported. The hollowed-out tungsten alloy bars are made through existing holes, then in the "back" work, while hollowing out the process. The tungsten bar is formed by pressing the burning and then rolling. Smaller dimensions are made from subsequent drawings. The rod has various direct lengths, the diameter of the surface forgings is generally 3 mm or more, and the finished product is generally below 3 mm. A non-central product can also be provided. It can also provide specific length and special components according to the requirements.
Tungsten alloy bars are widely used and popular
These kinds of rods can be further processed, usually used to make the balance weight, radiation shielding, military defense equipment, welding rod, extrusion die, also used in some sport, such as darts, steel billet, golf clubs, etc. in addition, we can produce and provide tungsten rods as Anviloy 1150 counterparts, nature is very similar between them. Due to its high density, high melting point, small capacity, good hardness, excellent wear resistance, high tensile strength, tungsten alloy bars are more and more popular.
Related link: http://www.wococarbide.com/Library/index.html
December 29, 2017
December 28, 2017
It is understood that in September 2017, the total output value of Japanese knives is about 34.143 billion yen, which is an increase of 8.4% from 315.04 billion yen in August, compared with 32.596 billion yen in the same period in 2016.
In addition, in the third quarter of 2017, the total number of Japanese carbide cutter output was about 99378 million yen, a 3.8% increase from the previous month, with the carbide cutting tool of 67.959 billion yen and 19.5%. High-speed steel tools were 218.88 billion yen and 28.2 percent less. Diamond cutter 28.8.3 billion yen and 12.2%; The cubic boron cutter was 6648 million yen,up 15%.
In September, the output value of Japan's carbide cutting tool was 23.271 billion yen, up 1.08% from the previous month and 20% year-on-year. The production value of high-speed steel tools was 75.79 billion yuan, up 9.1% from the previous year and 26.6% year on year. Diamond tool output is 10.07 billion yen, up 14% from the previous year and 10.3% year on year. Cubic boron cutter is worth 22.86 billion yen. Growth was 11.7 per cent quarter-on-quarter and 16.4 per cent year-on-year.
In the first nine months of 2017, the total number of Japanese bladeproduction was about 295.31 billion yen, up 0.2% year on year. Among them, the accumulative total of hard alloy knives is 14.5 billion yen and 14.5%. High-speed steel cutter 66.28 billion yen and 28.5%; Diamond cutter 8435 million yen and 6.7%; Cubic boron cutter was 19348 million yen and 5.3 %. It appears that the high speed steel cutter is a significant drag on the growth of the entire tool industry.
High speed steel cutter is a kind of toughness than ordinary knives, easier to carbide cutting tool, used to drill, tap, saw blade and hob, pinion cutter, broach and other precision cutting tools, especially suitable for manufacturing complex thin blade and impact resistance of metal cutting tools. In 1923, the emergence of the carbide makes the cutting speed increased to more than one hundred meters to hundreds of meters per minute, and its hardness is higher, which can be processed by high speed steel cutting materials, and with the constant improvement in recent years, the performance of cemented carbide, carbide cutting toolsgradually eroded the market share of high speed steel tools. Then there are more advanced cutting tools, such as ceramics, cubic boron and synthetic diamond, and they are more rigid and resistant than hard alloys.
High speed steel tools have excellent strength and toughness, while tungsten carbidecutting tools are superior in hardness and red hardness (the ability to maintain hardness under the cutting temperature). Generally, the cutting speed of the solid carbide tool can reach at least four times the cutting speed of the high speed steel cutter, and the tool life is longer. However, compared with high speed steel tools, the fracture toughness of hard alloy cutter is poor, which limits its application in certain machining areas, especially tapping.
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December 22, 2017
Carbon and graphite compounds are used for standard bearings, which have excellent corrosion resistance when working in most liquid environments.
Some liquid containing solid abrasives will hinder the binder or process and affect the use of graphite bearings. Alternative materials in this case, such as:
Cemented carbide bearings
A cemented bearing is a bearing made from a hard alloy. Tungsten carbide bearing has the characteristics of super high wear resistance and high impact resistance. The surface and inner hole of the cemented carbide bearing can achieve the mirror effect.
Carbon graphite bearing
Carbon graphite is a kind of graphite bearing material with high temperature resistance and certain self lubricating function. Its most significant advantages are high temperature stability and strong chemical corrosion resistance. In the early stage of development of graphite bearing, especially in strong corrosive medium or high temperature environment, carbon graphite has been used as bearing material and has been applied to some extent. With the progress of the powder metallurgy industry and the maturity of the impregnation process, the new impregnated graphite bearing has gradually replaced carbon graphite with its excellent properties.
Although the pure carbon graphite corrosion resistance and high temperature resistance is relatively high, but as bearing materials, flexural strength, compressive strength and its impact performance is poor, this is mainly due to its relatively large porosity (about 10% ~20%), and these are not impregnated filling holes, there is no play the reinforcing effect. But in some special occasions, the working medium is strongly corrosive, or because of the size of the structure, it is impossible to set up the heat shield without shielding the load.
Silicon carbide bearing
Carborundum belongs to ceramics, and most of the general ceramics now refer to ceramics other than carbon. Such ceramics are mainly Si3N4 and SiC, and their hardness is very high. The hardness of the SiO2, whose composition is mainly composed of sediment (HV800~1 000), is higher. Therefore, it has strong adaptability to impurities. The disadvantage is that the impact resistance is poor, but the measures can be taken to a certain extent according to the bearing structure.
Imported silicon carbide has been applied in many fields because of its high hardness, high temperature creep, high wear resistance, corrosion resistance and oxidation resistance. Silicon carbide can be divided into three kinds, such as high pressure sintering, pressure free sintering and reaction sintering, according to the different sintering methods. At present, the pressure free silicon carbide (SIC) has been widely used in shielded motor because of its high wear resistance and low friction coefficient. Under the condition of water lubrication, silicon carbide can produce a film of silicon dioxide and silica gel on the surface to further reduce the friction coefficient. The silicon carbide itself has the function of self lubrication, which is suitable for the material of friction. However, because of the high hardness of silicon carbide, the impact toughness is relatively low, and the fracture toughness of SiC without pressure sintering is only about 3~4MPa. M1/2. It is not suitable for the shock vibration condition, the silicon carbide as bearing material used in motor, in addition to the selection of spraying surface (or welding) of tungsten carbide grinding parts as friction pair, but also for special design in structure, set up special measures should be to force groove, to prevent silicon carbide by the impact have broken. At the same time, when silicon carbide is used as a bearing material to shield motors, the conveying medium must be clean and free of impurities, and requires stable operation and no vibration. Therefore, silicon carbide as a bearing material has greatly improved the friction life of tungsten carbide bearings. However, under the condition of high reliability, especially the shielded motor used for military and nuclear power, there are few uses of silicon carbide as bearing material, and the reliability needs further study.
This material is very similar to silicon carbide in abrasion resistance and corrosion resistance. However, it is also easily affected by the temperature adjustment and the impact of the operation of the machine.
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December 20, 2017
Hot spraying ceramic powders include oxide, carbide, boron, nitride and silicide, which are crystalline or non-crystalline compounds of metallic elements and non-metallic elements. Ceramic coating has the characteristics of high melting point, high hardness and good wear resistance, corrosion resistance and high temperature stability. However, the coating process is complex, the cost is higher, and the coating surface is prone to crack, the thermal fatigue performance is not as good as the metal coating. Moreover, the coating has poor toughness and can not be used to withstand large impact load. Currently, the commonly used ceramic coatings are A12O3, TiO2, Cr2O3, ZrO2, WC, TiC, Cr3C2, TiB2, etc., which are usually prepared by plasma spraying, flame spraying, HVOF and explosive spraying technology.
Plasma spraying A12O3-40% TiO2 and Cr2O3 sliding friction and wear properties of ceramics powder coating is pointed out that the wear resistance of coating Cr2O3 higher than A12O3-40% TiO2 coating, the wear mechanism of Cr2O3 coating are mainly abrasive wear and tear, under the large load, Cr2O3 coating wear characteristics of brittle fracture. The abrasion mechanism of a12o3-40% TiO2 coating is mainly characterized by plastic deformation and laminar stripping. Study of A12O3 plus TiO2 and NiCrAlY composite ceramic coatings, due to the melting of TiO2 and A12O3 formed a certain degree of miscibility, can decrease the coating porosity, further improve the strength, toughness and wear resistance of the coating.
Lin et al. studied the wear and tear characteristics of plasma spraying multi-layer metal and ceramic coating. The thermal spraying sequence was first sprayed on the base with NiCr on the bottom layer, then the nicr-cr2o3 transition layer of different proportions, with a surface of 100% Cr2O3. It is found that the transition layer of suitable metal and ceramic ratio can improve the wear resistance of the coating. The main wear mechanism of coating is brittle fracture, abrasive wear, adhesion and oxidation wear.
Metal and the excellent properties of ceramic materials have their unique and significant performance weakness, how to put the metal and ceramic materials combine their advantages performance, has been the direction of materials science and engineering research. Metal ceramic composite hot spraycoating technology, namely in the plastic substrate evenly distributed on the particle shape and size of the appropriate size ceramic phase, successfully integrate the advantages of metal and ceramic, the preparation of both strength and toughness, metal and ceramic advantages of high temperature resistance, wear resistance, corrosion resistance of composite materials, greatly expanded metal materials and ceramic materials, their application scope, in aviation, aerospace, chemical, mechanical, electrical and other industrial applications successfully. The most widely used metal ceramic coatings in industry are: Cr3C2- NiCr, WC- Co. HVOF, plasma and explosive spray are used in the process.
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December 13, 2017
December 08, 2017
December 07, 2017
The surface wire drawing process is usually the manual drawing and mechanical drawing.
As , hand-drawn wire is generally aimed at small workpieces, which have a certain shape of workpiece, and the grinding products used are usually industrial baijie. This kind of wire drawing method has low production efficiency, the line effect is unstable, so it is not mainstream in industrial production, the mainstream is mechanical drawing.
The advantages of mechanical drawing are fast, high degree of automation, and stable and controllable drawing effect. Mechanical drawing is mainly divided into flat - pressed abrasive belt drawing, wire - contact abrasive belt drawing, non-woven roller drawing.
First of all, we introduce the flat - pressed sand strip. The workpiece on the fixture, start the sand machine, abrasive belt high-speed rotation, and then, on the back of abrasive belt with a controlled, can be up and down, left and right sides of mobile press block, but briquetting press, abrasive belt can stick take in wire drawing workpiece surfaces. This kind of mechanical drawing method is a flat wire drawing, which can not have any convex point on the surface of the drawing. It is characterized by a continuous line pattern, long.
Wire contact sand drawing is a traditional drawing method. In different places, the surface of the contact surface of the sand belt is accomplished through the contact wheel instead of the specially designed pressure block. So the workpiece is in contact with the sand, point, line contact, not surface contact. So, even with the same sand belt, there is a distinct difference between line contact and surface contact method.
In addition to the two kinds of mechanical methods used in the use of abrasive belt, there are also non-woven roller wire drawing process. As I said, the non-woven material is also a good material for drawing. Non-woven material is elastic and has a special three-dimensional network structure, so it is commonly used as a wheel. Since the elastic ratio of non-woven material is better than sand belt, it has better surface fitting and is suitable for machining some curved parts. In addition, since the non-woven roller and workpiece are line contact, the surface contact of the peaceful pressure type abrasive belt drawing is less heat and is cold machining.
The above three types are commonly used in industrial production. In practical application, according to the different shape of the workpiece, the different line, and centerless grinding wiredrawing, static drawing several ways, such as but as a result of application is not wide, does not make the detailed discussion here.
To sum up, wire drawing process is a complicated and complicated process. It's difficult is not whether can pull wire lines, but in the case of the customer designated line effect, how to use the hands of the grinding materials, machinery and equipment, how to set the grinding parameters, etc., to pull out the high similarity of lines. Therefore, if you want to satisfy your customers, you should pay more attention to the new types of grinding products in the market, besides the type and performance of the machine.
December 01, 2017
A typical machining shop may consume thousands of cutting inserts per year. An operating worker may use many cutting inserts daily, but never think about the complex scientific knowledge behind the inserts. c, for the proper use of tools and performance optimization will be of great benefit.
Composition of Carbide blades
As with all man-made products, manufacturing cutting inserts first addresses the raw material problem of determining the composition and formulation of the insert material. Most of today's blades are made of cemented carbide, whose main components are tungsten carbide (WC) and cobalt (Co). WC is a hard particle in the blade, while Co acts as a bond to shape the insert.
Carbide cutting blades performance applications:
Carbide cutting blades, carbide blades, which is a powerful modern manufacturing equipment processing equipment, carbide cutting blades, carbide cutting tools with its excellent performance as a super-hard cutting tool in the most competitive products, as a Carbide cutting tool, it is a wealth weapon, widely used in manufacturing now. China xiamen Tungsten Technology Co., Ltd., tungsten carbide professional manufacturer, to provide all kinds of carbide cutting blades, carbide shaped custom-made tools customized service.
Carbide cutting blade Product features:
Our company has a complete industrial chain of cemented carbide, carbide production technology for many years based on, combined with rich experience and production and processing equipment to market-oriented customer demand-oriented, in order to achieve and meet the customer value for the goal, there is a Customers need to provide custom carbide cutting blades customized services to customer drawings or sample data as a reference to the specific requirements for the purpose and dedication to meet the customer's use of carbide cutting blades. My company in accordance with customer requirements produced by carbide cutting blades to ultra-fine particles of high-quality tungsten carbide raw materials for the substrate, after high-precision processing equipment refined, with good toughness and service life.
According to the needs of the development of the manufacturing industry, multi-function compound knives, high-speed and efficient knives will become the mainstream tool development. In the face of the increasing number of difficult-to-machine materials, the tooling industry must improve the tooling materials, develop new tooling materials and more rational tooling structures.
November 24, 2017
We know that the carbide drillsbit can greatly improve the productivity and reduce the cost of each hole processing. CoroDrill 860 is the most rapidly cutting solid carbide drill bit in the market, mainly used for drilling of steel. The drill is well suited for conventional drilling, chamfering hole, inclined surface drilling, drilling cross hole, diamond laminated plate and concave surface borehole etc. In the aspect of hole processing performance, CoroDrill 860 is a new revolution. CoroDrill 860 bit of optimized design, can achieve much more than many of the common drill hole penetration rate and the processing safety - which means that it has the strength to improve reliability under the highest cutting parameters.
This kind of drill is specially designed for machining steel parts, which is suitable for machining of conventional drilling, chamfering, inclined surface, cross hole, pile drill and concave/convex surface. When using high cutting parameters for long or short cutting materials, this kind of carbide drill cuttings control is excellent and can achieve consistent and unfault-free drilling.
And processing all kinds of steel materials under high cutting parameters when chip control is very good, because CoroDrill 860 bit unique channel combined with a new chip groove, even under very high penetration rate can be achieved efficiently chip removal, it ensures the efficient and safe drilling.
The small features of the 860 cutting force of CoroDrill mean that the load on the cutting edge is also small, which is not easy to be problematic when the parts or thin-walled parts are poorly processed. Currently available, 3 ~ 8 times the diameter of the gage length range bit, chip can be used in long and short of scrap materials processing, such as alloy steel, low carbon steel, low alloy steel, high alloy steel and steel castings, etc. The standard diameter range is 3 ~ 20 mm, and the obtained hole tolerance is 8 ~ IT9.
Summary CoroDrill 860 solid carbide drills
The technical features of the head are as follows:
Unique new cutting edge shape can reduce cutting force and improve chip control.
The chip groove shape optimizes the chip forming, which improves the chip flow and chip removal.
The high toughness new tungsten carbideextends the cutter life;
The blade handle can control wear and provide higher reliability;
The enhanced bit round Angle improves the strength and the processing safety.
CoroDrill 860 reduces the processing cost of each hole, improves performance reliability, can achieve higher cutting parameters, and optimizes the performance of chip removal. Long tool life, wear and control.
November 23, 2017
The old precision casting method USES the fractional crystallizer, especially when casting flat ingots. The water jacket and the crystallizer are separate. With the development of casting technology, the crystallizer of modern precision casting method is one. Use old mold casting cooling water consumption is large, when because the old mould water supply is not closed, open fire and not part of the cooling water cooling, and a cooling and cooling of the secondary cooling intensity difference, inevitably produce some casting defects; And when the modern crystallizer is cast. Cooling water consumption is small. It has been proved that it is only about 70 percent of the amount of water used in the old mold. Currently abroad with low liquid level casting crystallizer, its purpose is to improve the cooling intensityof aluminum carbide, reduce or eliminate a cooling after the heating phenomenon of the air gap area, so almost no secondary cooling quenching condition, flat ingot casting ordinary have mould height fell to 100, of course, this requires the operator has a high operating level or add white liquid level control system.
The cooling water temperature requirement is not negligible. Normally, the cooling water temperature is set at 20, but due to regional climatic conditions. The conditions of water supply facilities and the temperature of plant are different, so the quality defects of ingots are found in regional or seasonal ingots. Modern mold water supply system with pulse or cross disguised form function, are determined by the process of programming, so the cooling intensity can be set according to the casting technique for the curve, especially for some bad cold plastic and aluminum carbide, precision casting when cold crack and thermal cracking is almost at the same time, additional water retaining plate system, make the ingot surface temperature to the plastic tensile deformation temperature, eliminate cold cracks ingot casting, craft to take measures to prevent the hot crack, which can obtain high quality ingot.
Cooling intensity is also known as cooling speed. The cooling strength not only influences the crack of precision casting, but also influences the structure of the ingot, and increases the crystallization speed of the ingot as the cooling intensity increases. As the cooling intensity increases, the ingots are shallow. The bridge is shrunk in size. The metal shrinkage condition is improved, and the defects such as loose and porosity are eliminated or eliminated. Increase of ingot density: the size of a compound can be refined and the degree of regional segregation can be reduced.
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