Behavior of Thermal Deformations of Wheel and Workpiece and Form Generation Mechanism in Internal Grinding Process

Abstract

In this report in order to make clear the form generation mechanism in the internal plunge grinding process, the thermal deformations of wheel and workpiece are measured with both workpiece width and grinding time. Main conclusions obtained are as follows: (1) In the internal plunge grinding, by contrast to the surface or external grinding, the workpiece surface expands with the thermal deformation in the opposite direction of wheel surface. (2) The ground workpiece profile becomes an extremely concave profile, because the wheel surface expands just like a barrel shape due to the thermal deformation of wheel. (3) In contraction process of the thermal deformation of workpiece the concavity decreases but after grinding the concavity is left as an error of surface profile.