Abstract
In grinding, surface layer of a workpiece is highly heated in the interference zone between a grinding wheel and the workpiece. Therefore, the workpiece expands with heat around the grinding point. In this paper, theoretical equations of the temperature distribution and the local thermal expansion are obtained by applying Jaeger's heat transfer theory involving a moving heat source. Furthermore the new method to measure the local thermal expansion is proposed. Consequentry, the theoretical and the experimental results of the thermal expansion are in fairly good agreement, and the derived local thermal expansion has significant effect on the contour of the interference zone and the grinding accuracy.
