关键词: 成形磨削, 齿向修形, 齿面扭曲, 多轴附加运动优化, 遗传算法

Abstract: Aiming at the principle error caused by forming grinding of helical gears,an error reduction method based on multi-axis additional motion optimization was proposed.Based on the five-axis CNC forming grinding machine,a spatial meshing coordinate system was established,and the contact lines of theoretically modified flank and actual modified flank were solved.The impact on profile slope deviation of multi-axis additional motion was analyzed,and the normal single-axis additional motion was replaced by multi-axis additional motion.With the help of genetic algorithm,the multi-axis additional motion at each position was optimized to make the actual modified flank contact line and the theoretical modified flank contact line match,which improved the flank accuracy.Through the simulation and experiment,it was proved that the method could effectively reduce the flank twist and improve the overall precision of the flank.

Key words: form grinding, lead modification, tooth surface twist, multi-axis additional motion optimization, genetic algorithms