少干涉螺纹铣削固定循环G指令开发  

The development of the G code of the fixed cycle for thread milling with less interference

作　　者：罗辉[1] 胡自化[2] 崔亚飞 LUO Hui;HU Zihua;CUI Yafei(Key Laboratory of Intelligent Manufacturing,Yongzhou Vocational and Technical College,Yongzhou 425100,China;School of Mechanical Engineering and Mechanics,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]永州职业技术学院智能制造重点实验室,湖南永州425100 [2]湘潭大学机械工程与力学学院,湖南湘潭411105

出　　处：《湘潭大学学报（自然科学版）》2023年第5期76-86,共11页Journal of Xiangtan University(Natural Science Edition)

基　　金：湖南省自然科学基金项目(2023JJ50429,2022JJ60081)。

摘　　要：针对圆柱内螺纹铣削过程中切入、切出段的干涉问题,基于西门子840D数控系统开发了少干涉螺纹铣削固定循环G代码指令.通过分析螺纹铣削切入、切出段产生干涉误差的原因,针对螺纹铣削的半螺旋与四分之一螺旋铣削切入、切出过程,引入了减少干涉误差的刀轨偏心距系数e与m.基于西门子数控系统宏程序编程,开发了含有刀轨偏心距系数的螺纹铣削固定循环G指令.仿真实验结果表明:切入与切出段螺纹干涉误差会随着刀轨偏心距系数e与m的增大而减小,所开发的G指令能够灵活实现任意刀轨偏心距系数的螺纹铣削加工.可见,开发的含有导轨偏心距系数的螺纹铣削固定循环G代码能有效控制切入、切出段螺纹干涉误差,提高螺纹加工精度.Aiming at the interference problem of cut-in and cut-out segments in the process of cylindrical internal thread milling,based on the Siemens 840D numerical control system,the G code instruction of less-interference thread milling canned cycle was developed.By analyzing the causes of interference errors in thread milling in and out sections,the tool path eccentricity coefficients e and m are introduced to reduce the interference error for the half helical and quarter helical milling in and out processes of thread milling.Based on the macro program programming of the Siemens CNC system,the thread milling canned cycle G code,including the tool path's eccentricity coefficient is developed.The simulation results show that the thread interference error of the cut-in and cut-out segments will decrease with the increase of the tool path eccentricity coefficients e and m.The developed G command can flexibly realize thread milling with any tool path eccentricity coefficient.It can be seen that the developed thread milling canned cycle G code containing the guide rail eccentricity coefficient can effectively control the thread interference error of the cut-in and cut-out segments,and improve the thread machining accuracy.

关 键 词：螺纹铣削 干涉误差 宏程序 G代码 指令开发 

分 类 号：TH131.3[机械工程—机械制造及自动化]