Abstract
This paper presents the development of thermal and experimental analyses of the temperature distribution for a workpiece and drill. Thermal deformations of the workpiece and drill are analyzed. Temperature distribution of unsteady state and thermal deformation of the workpiece with a moving heat source are calculated. Displacement of inner surface of the drilled workpiece is also calculated for some drilling conditions. The results indicate that the calculated temperatures of the workpiece and drill are found to be close to the experimental results, and maximum inner diameter of the drilled hole appears near the end of drilling. Thermal factor is outstanding in determining the geometrical accuracy of the drilled hole.
