ESTIMATION OF THE SPECIFIC ENERGY CAPACITY OF GRINDING OF TOOL STEEL WITH THE INPUT OF ADDITIONAL ENERGY INTO THE PROCESSING ZONE

Abstract

The article discusses a modern approach to estimating the specific energy intensity of grinding tool steels with cubic boron nitride wheels. Grinding processes with the introduction of additional energy into the processing zone are compared: electrochemical, electrospark, and electroerosion. Attention is drawn to the fact that grinding methods associated with the forced initiation of electroerosion discharges in the processing zone (electroerosion and electrospark) lead to excessive impact on both the processed surface and the cutting surface of the wheel, which, as a result, leads to an increase its wear and a significant increase in the specific energy intensity of grinding. It is shown that precisely in order to achieve a lower specific energy intensity of processing during grinding of steel knives of paper-cutting machines, which consist of hardened steel 9ХФ and unhardened steel 10, it is necessary to apply a dosed introduction of technological current to the processing zone and at the same time it is desirable to use grinding wheels made of cubic boron nitride on copper-tin metal bond.