Physical models of the formation of the main types of contact interaction in combined electric-diamond machining
It is known that when sharpening a metal-cutting tool, a working surface layer is formed, responsible for their quality. In the process of grinding a pressure develops, which causes adhesion in the contact zone of such dissimilar materials as the circle and the material to be treated. As a rule, the consequence of this is the subsequent flow of diffusion processes. The operation of sharpening the tool from high-speed steels is perhaps even more important than hard alloys. And despite the fact that the highest quality is achieved by their treatment with elbor circles (on ceramic and organic bonds), but the specific consumption of the abrasive wheel and its productivity remain very high. The execution of the same grinding operation by the circles on metal bonds leads to salting of their working surface. To date, there are technologies that can combine the possibility of rational and highly effective use of diamond tools in grinding operations of modern materials. A comprehensive analysis of the state of the problem of processing various high-strength materials made it possible to point out the need for the development of combined methods, which, in some cases, are most effective compared to machining. In particular, these technologies are in demand when processing semiconductors and similar high-strength materials based on compounds of oxides of silicon, aluminum, zirconium diboride and others. The analysis of the experimental results obtained by domestic and foreign researchers shows that hybrid and combined processing technologies, in the full diversity of their combination, make it possible to enhance the advantages of various methods and avoid their technical limitations.The results obtained, presented in this article, open up new directions in the development of methods of combined diamond grinding, the study of the causes of loss of the cutting properties of diamond tools on a metal bond when processing various high-strength materials. They make it possible to work out a new scientific approach to substantiating the mechanism of the formation of a greasy layer, which imposes certain technical restrictions on the use of diamond tools.