Superfine-grained cubic boron nitride (CBN) grinding wheel with high abrasion resistance and thermal conductivity and preparation method thereof

Abstract

The invention discloses a superfine-grained cubic boron nitride (CBN) grinding wheel. During preparation of the grinding wheel, superfine-grained CBN grinding materials are pretreated to improve the mechanical properties of the materials; the dispersity of the grinding materials and other nanometer materials which are treated by a solution prepared from sodium polystyrenesulfonate, polyethyleneimine and the like is good, and the treated grinding materials and other nanometer materials are not prone to be agglomerated; nanometer powder forms a non-precipitation flocculent stable system in the solution and is uniformly mixed with the grinding materials, wettability and compatibility of the dried powder and an adhesion agent are better, and the adhesion is more compact and firmer; fluorocarbon resins serve as the adhesion agent, so that the surface of the grinding wheel is smooth, resistant to dirt and easy to clean. A prepared blank of the superfine-grained CBN grinding wheel is high in strength, excellent in abrasion resistance, good in thermal conductivity, not prone to damage a workpiece, high and uniform in porosity, and applicable to grinding high-accuracy metal parts.

Description

Technical field [0001] The invention relates to the technical field of preparation of ultra-fine-grained CBN grinding wheels, in particular to an ultra-fine-grained CBN grinding wheel with high wear resistance and high thermal conductivity and a preparation method thereof. Background technique [0002] Ultra-fine-grained CBN grinding wheel refers to a type of grinding wheel made of ultra-fine-grained (≤5μm) CBN abrasive and bonding agent. This type of grinding wheel has lower surface roughness and surface damage than traditional grinding wheel materials. , The grinding precision is higher, and the surface quality of the parts can be improved, which is also an important direction for the development of the grinding wheel industry. [0003] In terms of production process, due to the ultra-fine particle size of the abrasives, the abrasives are prone to agglomeration, and the bonding with the bonding agent becomes poor. Thus, the prepared grinding wheel will easily scratch the surface ...

AI Technical Summary

Problems solved by technology

[0003] In terms of production technology, due to the ultra-fine particle size of the abrasive, it is easy to agglomerate between the abrasives, and the bonding with the binder becomes poor. The prepared grinding wheel is very easy to scratch the surface of the workpiece and affect the quality of the workpiece. Therefore, in production In the process, it is necessary to pre-treat the ultra-fine abrasive to improve its compatibility and dispersion with the binder, and at the same time develop a binder suitable for ultra-fine abrasives to obtain a finished product with low surface roughness

At present, the technology for preparing ultra-fine grinding wheels still has the disadvantages of low processing efficiency and high production cost, so it is necessary to further improve and optimize the raw material formula and preparation process