Is for abrasive grinding , grinding and polishing tools

Is for abrasive grinding , grinding and polishing tools . Most of the abrasive is made ​​of abrasive plus artificial abrasive binding agent , is also useful natural mineral rock directly processed into natural abrasive. In addition to grinding and other metal processing machinery  shop roll manufacturing industry has been widely used , but also for food processing, paper industry and the ceramics, glass, stone, plastic , rubber, wood and other non-metal materials processing.
Abrasive in use , when the blunt abrasive , because the abrasive agent or a combination of its own to break fracture , the abrasive grain from the partial or complete loss , the working surface of the abrasive grinding emerging new cutting edge , sharp or continuously exposing new abrasive grains , the abrasive can be maintained within a certain time cutting . This self -sharpening abrasive is abrasive tool compared with the sanding paper roll  general prominent feature .
As early as the Neolithic Age , humans had already started to process the application of natural stone knives , stone axes , bone , horn , and tools such as a tooth ; 1872 , appeared in the United States with natural abrasives combined with clay firing ceramic grinding wheel ; 1900 years ago, the advent of artificial abrasives , using artificial abrasives manufacturing have produced a variety of abrasives for grinding and grinding create the conditions for rapid development . Since then , natural abrasive in the abrasive proportion gradually reduced.
Abrasives source of their raw materials , with natural and artificial abrasive abrasive categories. Commonly used in machinery industry is only natural abrasive Whetstone . Artificial abrasive characteristics according to the basic shape and structure of the distinction between a grinding wheel, grinding , stone, sand tile ( the foregoing collectively referred abrasive ) and coated abrasives five . In addition , it is customary also put abrasives abrasive as a class .
The main features include abrasive abrasive , grain size, hardness, structure and bonding agent five factors . Depending on the choice of the appropriate applications can directly improve the processing quality and productivity.
1 Abrasive
Abrasives are used for abrasive corundum, white corundum, silicon carbide and green silicon carbide . Corundum high toughness , suitable for grinding carbon steel, alloy steel , malleable iron and hard bronze high tensile strength of the material. Corundum has a higher hardness than corundum , cutting performance is better, for hardened steel, high  velcro disc carbon steel , high speed tool materials such as grinding process ; black silicon carbide , high hardness, brittle and sharp , suitable for grinding , cut low tensile strength of the material , such as: cast iron, glass, ceramics , stone, refractory materials , etc. ; darker green silicon carbide high purity silicon silicide . Suitable for grinding carbide, optical glass , precious stones, agate and other hard and brittle materials .
2 Granularity
The choice depends on the particle surface of the workpiece machining accuracy and productivity requirements. Coarse-grained and medium-grained abrasive for roughing and semi-finishing , and fine-grained abrasive , it applies to finishing and super finishing . Physical and mechanical properties are grinding department also factors that determine particle size , low hardness , ductility and toughness of the material is appropriate to coarse-grained abrasive machining , high hardness brittle materials appropriate to fine-grained abrasive.