薄壁件加工误差补偿建模与学习控制方法

doi:10.3901/JME.2018.17.108

机械工程学报 ›› 2018, Vol. 54 ›› Issue (17): 108-115.doi: 10.3901/JME.2018.17.108

• 特邀专栏：智能制造装备 • 上一篇下一篇

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薄壁件加工误差补偿建模与学习控制方法

侯尧华, 张定华, 张莹

西北工业大学现代设计与集成制造技术教育部重点实验室西安 710072

收稿日期:2017-09-22 修回日期:2017-12-22 出版日期:2018-09-05 发布日期:2018-09-05
通讯作者: 张定华(通信作者),男,1958年出生,博士,教授,博士研究生导师。主要研究方向为航空发动机先进制造技术。E-mail:dhzhang@nwpu.edu.cn
作者简介:侯尧华,男,1992年出生,博士研究生。主要研究方向为薄壁件加工误差补偿学习控制及自适应加工。E-mail:ackleyhyh@live.cn;张莹,女,1981年出生,博士,副研究员。主要研究方向为复杂曲面的计算机辅助几何设计及多坐标数控加工理论。E-mail:zhangyingcdim@nwpu.edu.cn
基金资助:
国家重点基础研究发展计划（973计划，2013CB035802）和国家科技重大专项（2015ZXO4001202）资助项目。

Error Compensation Modeling and Learning Control Method for Thin-walled Part Milling Process

HOU Yaohua, ZHANG Dinghua, ZHANG Ying

Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education, Northwestern Polytechnical University, Xi'an 710072

Received:2017-09-22 Revised:2017-12-22 Online:2018-09-05 Published:2018-09-05

摘要/Abstract

摘要： 针对薄壁件加工过程中的切削变形问题，提出了加工误差补偿学习控制方法。该方法以弹性变形为基础，建立了加工误差与名义切深的非线性函数关系，并利用补偿思想，构造了薄壁件加工误差补偿通用模型，即下次切削时名义切深的计算方法。在此基础上，利用数学原理和物理方法提出了四种具有不同收敛速度的补偿系数迭代算法。对比分析四种方法的优劣，以及多件单工步零件批量生产的特点，选择初始点割线法搭建误差补偿离散控制系统。该系统利用反馈原理实现了补偿系数的离线学习与加工误差的准确控制。最终以侧铣加工试验验证了该模型的有效性。

关键词: 薄壁件, 离线学习, 误差补偿, 系数控制

Abstract: Compensation and learning control method of machining error is proposed to solve the deformation problem in thin-walled part processing. Based on elastic deformation, the nonlinear function between machining error and nominal depth of cut is established. Utilizing the idea of error compensation, the general compensation model of thin-walled part cutting error is developed, which means the calculation method of next nominal depth of cut. After that, four different solutions for compensation model are presented using mathematical and physical principles. Considering the mass process of multi-parts with single-step and the advantages of four solutions, the secant method with initial point is chosen to construct the discrete control system of error compensation. Applying the feedback principle, the offline learning of compensation coefficient is implemented to control machining error exactly. Finally, the flank milling is applied to verify the effectiveness of compensation model.

Key words: coefficient control, error compensation, offline learning, thin-walled part

中图分类号:

TG156

侯尧华, 张定华, 张莹. 薄壁件加工误差补偿建模与学习控制方法[J]. 机械工程学报, 2018, 54(17): 108-115.

HOU Yaohua, ZHANG Dinghua, ZHANG Ying. Error Compensation Modeling and Learning Control Method for Thin-walled Part Milling Process[J]. Journal of Mechanical Engineering, 2018, 54(17): 108-115.

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薄壁件加工误差补偿建模与学习控制方法

Error Compensation Modeling and Learning Control Method for Thin-walled Part Milling Process

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