基于比对仪在线测量数据的加工误差补偿  

Compensation of Machining Error Based on the Measurement Data of the Equator

作　　者：向华[1] 周谋 胡鹏程 周浩 XIANG Hua;ZHOU Mou;HU Peng-cheng;ZHOU Hao(National NC System Engineering Technology Research Center,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学国家数控系统工程技术研究中心,武汉430074

出　　处：《组合机床与自动化加工技术》2022年第3期111-115,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金(U19A2072);湖北省重点研发计划项目(2020BAB038)。

摘　　要：针对批量加工过程中可重复出现的系统误差分量,提出一种基于比对仪在线测量数据的加工误差补偿方法。使用比对仪在线获取零件表面点坐标;基于局部多项式回归建立零件确定性误差模型;利用最近点搜索算法建立了误差模型点的指令域映射关系;根据对应关系,提取了零件系统误差分量;面向华中数控系统,基于双码联控技术实现对加工误差的补偿。对蝴蝶件进行实验验证,结果表明,该方法将最大误差数值提升约46.5%,误差均方根数值提升约66.1%,可有效改善零件加工质量。For the repetitive systematic error components in the batch processing,a method of machining error compensation based on the measurement data of the Equator is proposed.The Equator is used to obtain the coordinates of workpiece's points online;the workpiece's deterministic error model is established based on the local polynomial regression,and the nearest point search algorithm is used to establish the instruction domain mapping relationship of the measurement data;and then extract the systematic error component from it.Finally,the systematic error component is compensated based on the double-code control technology for HNC.Validation experiments were carried out on the butterfly parts,and the results showed that the method increased the maximum error value by about 46.5%and the root mean square error by about 66.1%,which can improve the processing quality of the workpiece effectively.

关 键 词：比对仪 加工误差补偿 指令域 局部多项式回归 双码联控 

分 类 号：TH161[机械工程—机械制造及自动化] TG659[金属学及工艺—金属切削加工及机床]