Difficulties in making fine grinding wheel

Micro-powder detection:
Firstly, it is difficult to detect fine-grained diamond. Domestic grinding wheel manufacturers seldom detect the raw materials they buy.
One is because some grinding wheel manufacturers don't understand the raw materials at all.

Second, the testing equipment is very expensive, especially 4000 with fine grain size, which most manufacturers can not afford.

Its three fine-grained detection is difficult and needs long-term research to find its disadvantages.

The four grinding wheel manufacturers are not strict in process, working environment and different carefulness of operators. Fine grit size requires strict control of working environment. Operating tables, mechanical equipment, tooling, etc. need to be cleaned and maintained for a long time. No

Certainly qualified fine-grained diamonds will occur, as the latter contamination results in unqualified grinding wheels, and no cause can be found after problems occur. Fine grinding wheel is best manufactured for special use by plant personnel to avoid cross-contamination.

 

Forming pressure:
Forming pressure of fine-grained diamond grinding wheel is an important process factor, which affects the strength, hardness, porosity and its distribution of the parts.

Fine-grained products consist of fine particles with larger surfaces and more contact between them, so the hardness is higher. When the hardness is the same, the porosity is higher. Large contact surfaces also increase the forming pressure relatively. Larger particles have larger pores, while smaller particles have smaller pores.

 

Abrasives for high density products are best made with mixed grain sizes so that products with high filling density and low porosity can be made with different particle ratios. Strict particle size control may be considered in the manufacture of low porosity products. Some grinding wheel manufacturers are subject to production pressure. Different batches of fine-grained diamonds have different sizes which cause different softness and hardness of grinding wheels.

 

They will use adjusting binders, forming density, sintering temperature, etc. Although this will improve, the stability of batch diamond grinding wheels is not good, and even some manufacturers almost do not test and can not control the products.

 

The size and crystalline shape of fine-grained grinding wheel will affect the forming density, sintering shrinkage and the affinity of the binder. To do a good job of fine-grained grinding wheel, the quality of diamond must be strictly controlled, which is also the reason why foreign fine-grained diamond grinding wheel is very expensive. Fine grinding wheel is a combination of many disciplines, such as chemistry, mechanics, physics, materials and machining.

To do a good job in basic research of fine grinding wheel, it is necessary to link up the production process before and after. At present, some domestic manufacturers have started the above research and believe that the domestic short board in the field will be finally solved.