THEORETICAL DETERMINATION OF CUTTING TEMPERATURE DURING BLADE PROCESSING

Abstract

The paper proposes two calculation schemes for determining the cutting temperature during mechanical processing. The first calculation scheme is based on taking into account the continuous uniform removal of the processed material over time, which is achieved in grinding conditions, when the connection of the grinding wheel is in continuous contact with the processed material. The second calculation scheme is based on the fact that the process of chip formation during cutting under the conditions of blade processing is carried out by periodic shifts of elementary volumes of the material along the conventional shear plane, which is located at a certain angle to the direction of movement of the processed part. Calculations have established that with their significant increase, the cutting temperature can increase up to 10 times. This occurs when grinding in conditions of continuous contact between the bond of the grinding wheel and the processed material. During blade processing, the number of shear elementary volumes of the processed material arising in the cutting zone is insignificant, which allows you to reduce the cutting temperature and increase the quality and productivity of processing, bring the calculated and experimental values ​​of the cutting temperature into line. This makes it possible to justify the effectiveness of the transition from the grinding process to modern methods of blade processing in the finishing operations from new theoretical positions.