Tungsten Carbide Ball Grinding Technology

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Category: Tungsten Information
Published on Monday, 13 October 2014 18:50
The methods adopted in tungsten carbide ball grinding mainly include: V-shaped groove grinding, conical grinding, spin rotation control grinding, dual rotation grinding disc grinding, magnetic suspension grinding, and so on.
 
When processing tungsten carbide balls, there exits many problems due to its high hardness, which include: low surface energy, grinding media, poor adhesion properties of grinding medium, and so on. These problems will affect processing efficiency, surface roughness, machining accuracy, and so on. Therefore, the key processing technologies and difficulties lie in: 
1. Increasing adhesion properties of grinding medium to the tungsten carbide ball surface. Grinding mediums include abradant and grinding lubricant. Abradant can be used in the cutting of tungsten carbide surface, while grinding lubricant helps abradant well adhere to the tungsten carbide ball surface and thus ensure uniformity and effectiveness of abradant cutting. 
2. Improving the rotation performance of tungsten carbide ball. By changing the angle and shape of grinding plate groove and rotation speed of grinding plate, the rotation performance of tungsten carbide balls can then be adjusted. 
3. Optimization of batch processing parameters. The grinding technology parameters include the speed of grinding plate, pressure, groove shape, etc. 
After solving these key technologies problems, the surface roughness, machining precision and processing efficiency of tungsten carbide ball grinding can be ensured.
 
 
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Tungsten Carbide Ball Production Process

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Category: Tungsten Information
Published on Monday, 13 October 2014 18:48
Sintered carbide ball is a kind of sintered metal product made through pressing and sintering; its production process is similar to other tungsten carbide products. 
 
Its main production process is as follows: milling → giving formula according to difference → wet-grinding → mixing → smashing → drying → sieving → adding forming binder →drying again → gaining compound after sieving → granulation →isostatic pressing → forming → sintering → molding (blank). 
 
After getting blank balls, surface finishing should be conducted according to specific needs, mainly adopting methods of grinding and polishing, after which the surface will attain high precision and achieve mirror brightness.
 
 
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Tungsten Carbide Ball Production Process

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Category: Tungsten Information
Published on Monday, 13 October 2014 18:47
Sintered carbide ball is a kind of sintered metal product made through pressing and sintering; its production process is similar to other tungsten carbide products. 
 
Its main production process is as follows: milling → giving formula according to difference → wet-grinding → mixing → smashing → drying → sieving → adding forming binder →drying again → gaining compound after sieving → granulation →isostatic pressing → forming → sintering → molding (blank). 
 
After getting blank balls, surface finishing should be conducted according to specific needs, mainly adopting methods of grinding and polishing, after which the surface will attain high precision and achieve mirror brightness.
 
 
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Tungsten Carbide Ball

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Category: Tungsten Information
Published on Monday, 13 October 2014 18:45
Tungsten carbide ball is commonly known as solid carbide ball, the major component of which is the tungsten carbide (WC, TiC) micron-size powders of refractory metal with high hardness. It is a kind of sintered metal product produced by adopting cobalt (Co), nickel (Ni) and molybdenum (Mo) as binders, being sintered in a vacuum furnace or a hydrogen reduction furnace, using automatic extruder to obtain blank ball, and then polishing and grinding its surface. 
 
Tungsten carbide ball has high hardness, abrasion resistance, corrosion resistance and flex resistance and can replace all kinds of steel balls products. 
 
Common grades of tungsten carbide balls mainly include: YG6, YG6X, YG8, YG13, YG20, YN6, YN9, YN12, YT5, YT15, and so on. 
 
Tungsten carbide balls have wide application range, such as: precision bearings, instruments, pens, spraying machines, pumps, machinery parts, sealing valve, brake pump, squeeze hole punch, oil, hydrochloric acid laboratory, hardness measuring instrument, fishing gear, weight, decoration, finishing, and other industries.
 
 
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Tungsten Carbide Dry Cutting Hob Introduction

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Category: Tungsten Information
Published on Saturday, 11 October 2014 18:55

Tungsten carbide dry cutting hob is a kind of high-speed and environmental friendly numerical control gear hobbing technology. It can conduct efficient and high-speed primary or secondary cutting machining towards gear blank of quenched steel and carburizing steel materials

Materials of current gear cutting tools can be divided into four categories: tungsten carbide, ceramics, powder metallurgy high-speed steel and high-speed steel with high performance. Ceramic material is used in this field for a long time, but it is seldom used to produce complicated hobs while tungsten carbide material is more commonly used. China's current production of powder metallurgy high-speed steel and high-speed steel with high performance is still rare, but because china is abundant in tungsten carbide resources, thus this kind of material is supposed to become the leading material type in processing high-speed dry cutting gear hobs.


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Hollow Tungsten Carbide Rod

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Category: Tungsten Information
Published on Saturday, 11 October 2014 18:46

Hollow tungsten carbide rod is a kind of tungsten carbide rod with a large through-hole in the axial center, also known as tungsten carbide tube. Hollow tungsten carbide rod has various kinds of specifications, which include diameter 8 ~ 25mm, Canon 4 ~ 15mm and length 120 ~ 250mm. Hollow tungsten carbide rods of different specifications can be produced according to different purposes. Hollow tungsten carbide rod has rapid heat conduction speed, good abrasion resistance, high elasticity and low coefficient of thermal expansion, and thus mainly used as protective sleeve of thermocouple and thermal resistance, accessories of temperature measurement equipment, and so on.


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Tungsten Carbide Threaded Rod

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Category: Tungsten Information
Published on Saturday, 11 October 2014 18:43

Tungsten carbide threaded rod has high hardness, and generally, can be formed directly.
Tungsten carbide threaded rod can be divided into two types: external thread and internal thread. External thread is relatively easier to process than internal thread. External thread can be processed by grinding. After tungsten carbide rods being formed in shape, the external thread can be molded and then be grinded and processed to achieve a series of size requirements. Internal thread can be processed through electrosparking, and after tungsten carbide rods take shape, cavity can be formed. After that, unipolar electrospark is used to process internal thread.

To process threads on tungsten carbide rods will take up a lot of time and cost, so if there is no special purpose, it is generally not recommended.


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Tungsten Carbide Rod Hardness Test

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Category: Tungsten Information
Published on Saturday, 11 October 2014 18:42

Tungsten carbide rod hardness test mainly adopts Rockwell hardness tester to test HRA hardness level. This is a kind of non-destructive test, and is relatively easy to operate. This kind of detection method has small testing force and little indentation, high measuring speed and high efficiency; therefore, it can be directly used to test finished products.

Hardness test has certain similarities with tensile test, both of which are used to test the resistance capability of metals to plastic deformation. Because tensile test is a kind of destructive test, so hardness test is adopted more frequently than tensile test.


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Tungsten Carbide Square Rod

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Category: Tungsten Information
Published on Saturday, 11 October 2014 18:40

Tungsten carbide square rods are long rods with rectangular cross section, also known as tungsten carbide bar. Both its processing technology and performance are the same as tungsten carbide round rod. It has high hardness, abrasion resistance and impact resistance.

Tungsten carbide square rod has good versatility and is easy to weld, and thus suitable for processing wood, non-ferrous metals, cast iron, hardened steel, PCB, etc., and can also be used to manufacture various types of motors, dies and punches.


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Tungsten Carbide Measuring Rod

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Category: Tungsten Information
Published on Saturday, 11 October 2014 18:38

Tungsten carbide measuring rod is used to detect inner bore of products using tungsten carbide bars of certain established specifications. With the hardness of 90HRA, tungsten carbide measuring rod has excellent abrasion resistance, long service life, low coefficient of thermal expansion, and is less susceptible to damage and endure high temperature. Its life expectancy is 20-30 times longer than that of steel.

There are four main measuring projects of tungsten carbide measuring rods: aperture, hole center distance, hole position and hole inclination.


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