关键词: 成形磨齿, 齿向修形, 五轴运动优化, 鼓形, 数控系统

Abstract: Aiming at the problem of low accuracy of double flank grinding and inefficiency of single flank grinding,the precision of tooth surface modification was realized in double flank grinding by optimizing the five-axis motions of Computer Numerical Control(CNC)gear profile grinding machines.The mathematical model for actual tooth surface was built according to the spatial surface enveloping theory,and the topographical deviations of actual tooth surface relative to standard tooth surface were calculated.An optimization model was established by using the five-axis motion polynomial coefficients as the optimization parameters and the minimum difference between actual and target tooth deviations as the optimization objective.The five-axis motions were solved using the optimization model.Through the numerical analysis and experiment,the proposed method was proved to reduce the tooth twist effectively resulted from crowning the tooth lead with conventional method.

Key words: gear profile grinding, lead modification, five-axis motions optimization, crown, numerical control system