关键词: 环曲面, 金刚石切削, 刀具路径, Hermite插补, 三弯矩法

Abstract: In order to solve the difficult machining problems， the diamond turning of toric surfaces was discussed. In the tool path generating processes， an integrated discretization method was proposed for the discretization of cutting contact points. Besides， the distances in Z direction of adjacent cutting contact points were set up to reduce the tool movements resulting in the decrease of discretization errors. For the interpolation of cutting location points， the three bending moment method was proposed to realize the continuous of second order derivative. The simulation results indicate that the integrated discretization method may reduce discretization errors and the interpolation errors were decreased from 0.35 μm to 0.001 2 μm. The experimental results show that the tool path generation is practicable and the surface quality of workpiece will be improved.

Key words: toric surface, diamond turning, tool path, Hermite interpolation, three bending moment method