TEMPERATURE OF HEATING AND COOLING OF MASSIVE, THIN, AND WEDGE-SHAPED PLATES FROM HARD-TO-MACHINE STEELS DURING THEIR GRINDING

Grinding of fl at parts occurs by solid abrasive particles due to the physicomechanical process of deformation and to the action of a process liquid at high temperatures in a zone small in volume and diffi cult for observation. The rate of heating and cooling depends on the change in the intensity of the heat fl ux and in the velocity and time of action of the heat source. A study has been made of the regularities of the infl uence of each of these parameters on the depth and character of structural transformations during the grinding of fl at parts from hard-to-machine steels. A procedure to calculate temperature in grinding massive, thin, and wedge-shaped parts has been developed with account taken of the geometric and thermophysical parameters of the tool and the treated part, and also of cutting regimes. The procedure can be used as a constituent part in developing a system for automatic design of the technological process of grinding of flat surfaces. A relationship between the temperature in the grinding zone and the regimes of treatment has been established which makes it possible to control the quality of the surface layer of massive, thin, and wedge-shaped plates from hard-to-machine steels. The rational boundaries of shift of cutting regimes have been determined.
Grinding of fl at parts occurs by solid abrasive particles due to the physicomechanical process of deformation and to the action of a process liquid at high temperatures in a zone small in volume and diffi cult for observation. The rate of heating and cooling depends on the change in the intensity of the heat fl ux and in the velocity and time of action of the heat source. A study has been made of the regularities of the infl uence of each of these parameters on the depth and character of structural transformations during the grinding of fl at parts from hard-to-machine steels. A procedure to calculate temperature in grinding massive, thin, and wedge-shaped parts has been developed with account taken of the geometric and thermophysical parameters of the tool and the treated part, and also of cutting regimes. The procedure can be used as a constituent part in developing a system for automatic design of the technological process of grinding of flat surfaces. A relationship between the temperature in the grinding zone and the regimes of treatment has been established which makes it possible to control the quality of the surface layer of massive, thin, and wedge-shaped plates from hard-to-machine steels. The rational boundaries of shift of cutting regimes have been determined.
Author:  V. B. Dement′ev, T. N. Ivanova, and A. M. Dolginov
Keywords:  flat parts, hard-to-machine steels, temperature, plate thickness, strip source.
Page:  102