In this paper, a new griding method is introduced to calculate strain and stress contour for rear wheel cover of CA142 truck and the reasons for stamping defects are analyzed.

In the field of modification, wheel modification and contour coating is a major modification of the store pushing the project.

This paper introduces the shape grinding process of the decides grid trough and the rule's contour and the process of grinding wheel truing, analyzes the process simulation by computer.