关键词: 成形磨削, 瞬时接触线, 齿向修形, 误差, 刀位优化

Abstract: Aiming at the twist problem of the additional radial motion in lead modification of helical gear,a tool path optimization method was proposed by adjusting simultaneous contact lines.The dynamic simultaneous contact line was solved accurately based on the gear engagement theory.The error analysis for deviations of enveloped tooth surface with respect to theoretical tooth surface in measuring circle was established and the tool path was optimized on engaging region though the least squared-error method.As an example of crowning gear,the proposed method was validated,and the results showed that the method could effectively eliminate the modified errors in measuring circle,as well as reduce the maximum thickness error on meshing region.

Key words: form grinding, simultaneous contact line, lead modification, error, tool path optimization