ANALYSIS OF TRANSIENT THERMAL BENDING MOMENTS AND STRESSES OF THE WORKPIECE DURING SURFACE GRINDING

Geometrical inaccuracy is often induced by heat generated during grind ing Furthermore, the transient thermal process is the main cause for t he residual stresses on the ground surface. The objective of this arti cle is to investigate the three-dimensional transient temperature dist ribution of the workpiece using the finite difference method, and base d on the acquired temperature and beam theory, the thermal moment and thermoelastic stress as calculated using Simpson's multiple numerical integral method. The energy partition is the key factor in accurately predicting the temperature distribution, on which the solution of the thermal moment and stress rely. As the heat conductivity of the workpi ece decreases, the stress and moment increase near the wheel-workpiece contact zone and the peak move closer to the contact position. A smal ler thickness results in higher thermal stress and lower thermal momen t. Enhancing cooling in grinding effectively reduces temperature and t he induced stress.