The use of intermittent wheels, impregnated by the contact method to reduce the thermal stress of the grinding process

Abstract

The proposed composition of solid technological lubricant applied to the working surface of the abrasive wheel directly in the grinding process. Experimental studies have been carried out to identify the effect of implanting on the normal and tangential components of the cutting effort and temperature that occur when grinding with abrasive wheels with continuous and intermittent work surfaces. It is established that when grinding with impregnated intermittent circles, the magnitude of the ratio Fz /Fy normal to the tangential component of the cutting force is less than when grinding with impregnated wheels with a solid working surface. It was established experimentally that the impregnation of the working surface of intermittent wheels reduces the thermal stress of the grinding process and increases the number of actively working grinding grains. The decrease in the Fz /Fy ratio during intermittent grinding with an impregnated wheel compared to dry intermittent grinding can be explained by a decrease in Fz with a simultaneous increase in Fy. A decrease in temperature when using solid lubricant indicates a decrease in the coefficient of friction of grinding grains with the processed material and, therefore, a decrease in the tangential component of the cutting force Fz . An increase in the number of actively working grains during grinding with intermittent impregnated circles compared to dry intermittent grinding indicates an increase in the normal component of the cutting force Fy. It is established that the maximum temperature during grinding with impregnated intermittent circles shifts towards the rear point of the contact arc compared to dry grinding, where the temperature reaches its highest value near the front point of the contact arc of a circle with the material being processed.