Abstract: By analyzing the workpiece’s machining accuracy influences of the parameters, such as measurement accuracy and shape analyzing of grinding wheel in axisymmetric aspheric machining, a mathematic model that separates workpiece surface errors step by step in axisymmetric aspheric machining is put forward. Then the parameters and data of compensation machin- ing can be obtained. The experimental results show that new method of mathematic model is closer to calculating locus in theory. It can reduce machining error effectively and improve the machining accuracy greatly.

Key words: Axisymmetric aspheric surface, Compensation machining, Error separation, Grinding wheel, Machining accuracy