Theoretical Justification for Increasing Efficiency of Grinding Technological Processes Based on the Reduction of Cutting Temperature

The aim of the work is a generalized theoretical substantiation of conditions for reducing the cutting temperature durin g grinding to develop effective technological processes for grinding products made of materials with increased hardness. A theoretical solution was obtained, the main parameter of which is the maximum cutting temperature from heating the formed chips. It was theoretically established that when this temperature is reached, it is possible to increase machining productivity many times. By calculation and experiment, it was established that the maximum cutting temperature is many times higher than the melting point of the machined material. Сalculations proved an increase in machining productivity by providing a relatively small grinding temperature and applying multi-pass grinding with a relatively high speed of the workpiece. They also proved an increased grinding temperature by applying depth grinding with a relatively low workpiece speed. Based on an effective process of face grinding by diamond wheels on metal bonds of sealing rings made of hard alloy “Relit” with the application of electroerosion dressing, reducing energy consumption and increasing quality and productivity of processing was developed. An effective process of gear grinding by profile copying (depth grinding) with a highly porous abrasive wheel was developed. This made it possible to reduce the energy consumption of processing, increase productivity up to 5 times, and ensure defect-free processing.