关键词: 数控成形磨齿机, 床身导轨, 热误差, 温升, 齿面加工误差, 误差补偿

Abstract: To decrease the slide guide thermal error and improve the machining precise of large-scale Computer Numerical Control (CNC) gear profile grinding machine,the relationship between slide guide temperature rise and machining error and the error compensation were researched.The thermal error compensation models of slide guide temperature rise and wheel position error for a certain type of large-scale CNC gear profile grinding machine were set up by adopting the methods of multi-linear regressions.Based on the principle of forming grinding,the contact line equations between grinding wheel and tooth surface and the tooth surface modification for forming helical gears were set up.Thus,the thermal error compensation models of tooth surface modification between slide guide temperature rise and tooth surface error were founded and tested with large-scale CNC gear profile grinding machine.The result showed the gear machining precision was increased more than three grades,and indicated the high precision,good practicability and reliability of thermal error compensation models.The compensation models and research methods proposed had important guiding significance and reference value for further improving the machining precision of large-scale CNC gear profile grinding machine.

Key words: CNC gear profile grinding machine, slide guide, thermal error, temperature rise, tooth surface machining error, error compensation