基于小波包算法的斜齿轮滚齿加工误差补偿  

Error Compensation of Helical Gear Machining Based on Wavelet Packet Algorithm

作　　者：丁国龙[1] 周明成 吴熙 李天一 向华[2] 杨春兰 DING Guolong;ZHOU Mingcheng;WU Xi;LI Tianyi;XIANG Hua;YANG Chunlan(School of Mechanical Engineering,Hubei University of Technology,Wuhan Hubei 430068,China;National NC System Engineering Research Center,Huazhong University of Science and Technology,Wuhan Hubei 430074,China;Qinchuan Group(Xi an)Technology Research Institute Co.,Ltd.,Xi an Shaanxi 710016,China)

机构地区：[1]湖北工业大学机械工程学院,湖北武汉430068 [2]华中科技大学国家数控系统工程技术研究中心,湖北武汉430074 [3]秦川集团(西安)技术研究院有限公司,陕西西安710016

出　　处：《机床与液压》2023年第8期42-47,共6页Machine Tool & Hydraulics

基　　金：2020年湖北省科技重大专项(2020AGA018-04)。

摘　　要：斜齿轮滚齿加工依靠2组电子齿轮箱对多轴同步控制,同步误差来源于滚刀B轴的旋转运动和工件C轴的联动误差以及滚刀沿Z轴的轴向运动和工件C轴的联动误差的线性叠加。复杂的运动关系和不平稳的加工状况,使得传统的斜齿轮加工误差补偿困难。采集C轴同步误差信号,利用小波包算法对其进行分解,研究不同频段尺度内子频带信号的幅值分布规律,进行误差特征辨识,重构斜齿轮加工同步误差。根据误差叠加原理,将重构后的同步误差解耦到参与联动的各伺服轴,修改NC代码,将误差量反向补偿到伺服轴。最后通过秦川YK3126数控滚齿机斜齿轮加工误差补偿实例,验证了补偿方法的有效性,提高了斜齿轮的加工精度。Helical gear hobbing processing needs to rely on two sets of electronic gear boxes to control multi axis synchronization.The synchronization error comes from the linear superposition of the rotational motion of hob B axis and the linkage error of workpiece C axis,as well as the axial motion of hob along Z axis and the linkage error of workpiece C axis.Therefore,it is difficult to compensate the helical gear processing error.The C-axis synchronization error signal was collected,the wavelet packet algorithm was used to decompose it.The amplitude distribution law of sub-band signals in different frequency band scale was studied,the error characteristic was identified,and the synchronization error of helical gear processing was reconstructed.According to the error superposition principle,the reconstructed synchronization error was decoupled to each servo shaft participating in the linkage,the NC code was modified,and the error was compensated to the servo shaft in reverse.Finally,through the example of helical gear processing error compensation of Qinchuan YK3126 CNC hobbing machine,the effectiveness of the compensation method was verified,the machining accuracy of helical gear was improved.

关 键 词：滚齿加工 多轴同步运动 小波包分解与重构 误差补偿 

分 类 号：TH132.41[机械工程—机械制造及自动化] TG61[金属学及工艺—金属切削加工及机床]