THE IMPREGNATED ABRASIVE TOOL POTENCY IN MECHANICAL TOOLING OF BEARING PARTS

The technology of grinding bearing parts holds a significant place in machinery production. This topic is particularly relevant at the present time, as there are raised requirements for this process, both in terms of productivity and the quality of finished products. The efficiency of finishing bearing parts in modern high-tech manufacturing is determined by the use of highly efficient abrasive tools with stable performance characteristics. Ceramic-bonded abrasive tools are subject to significant environmental effects, especially when working with water-based cooling lubricants (coolants), which significantly alter the physical and mechanical properties of grinding discs, reducing its hardness and strength and, resulting in a decrease in its performance characteristics. One of the effective ways to improve an abrasive tool can be considered the introduction of solid lubricants (impregnation) into its pores, which improve the grinding conditions and the quality of the surface layer of the machined bearing parts. The laboratory studies carried out by the authors on the basis of the Scientific and Technical Center "VNIIASH" and considered experience of industrial use of impregnated tools in bearing manufacturing enterprises show its effect only in the case of uniform impregnation of the entire abrasive tool and ensuring uniform filling of its pore space. Based on the results of our research, we have found the possibility of productive, high-quality impregnation of abrasive tools with sulfur using the method of free capillary ascent along the pores of the disc. The use of impregnated abrasive tools at the enterprises of the EPC corporation makes it possible to improve the quality of processing bearing parts and reduce the consumption of abrasive tools by 1,1 – 1,8 times.

grinding, heat treatment, impregnation, abrasive tool, hardness