Grinding Temperature Penetration Depth Study

Abstract

Grinding temperature spreads over the depth of the surface layer and in some cases causes the appearance of grinding burns and micro-cracks. These thermal grinding defects are located at a certain depth from the surface machined during grinding. In several cases, such defects are generally not permissible. In other cases, the possibility of the formation of such a defective surface layer must be provided for in the amount of the grinding stock, based on the obvious condition: the defective layer must be completely removed when the grinding stock is removed. In any case there is a need to determine the depth of the defective layer formed during grinding. The simplest way to solve this problem is the ability to determine the penetration depth of a certain critical temperature, which leads to thermal damage to the surface layer of the workpiece. To determine the depth of such a damaged layer, an approach based on modeling the temperature field in the surface layer is proposed. The possibility of determining in explicit form the depth of penetration of a fixed temperature exceeding a critical value is shown in the paper. A prerequisite for the analytical solution of such a temperature problem was the possibility of replacing the Jaeger fast-moving heat source with the action time of some unmoving heat source.