基于试验参数拟合的摆角铣头分块建模方法及特性分析

doi:10.3901/JME.2020.17.165

机械工程学报 ›› 2020, Vol. 56 ›› Issue (17): 165-172.doi: 10.3901/JME.2020.17.165

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基于试验参数拟合的摆角铣头分块建模方法及特性分析

杨哲^1,2, 刘成颖^1,2

1. 清华大学机械工程系北京 100084;
2. 清华大学精密超精密制造装备及控制北京市重点实验室北京 100084

收稿日期:2019-10-09 修回日期:2020-02-28 出版日期:2020-09-05 发布日期:2020-10-19
通讯作者: 刘成颖(通信作者),女,1960年出生,副教授,博士研究生导师。主要研究方向为超精密加工工艺与装备、精密驱动与控制、CAD/CAM/CAPP。E-mail:liucy@tsinghua.edu.cn
作者简介:杨哲,男,1995年出生。主要研究方向为有限元建模、机床设计优化。E-mail:dmeyangzhe@foxmail.com
基金资助:
国家科技重大专项资助项目（2017ZX04021001）。

Finite Element Modeling Method and Analysis for Bi-rotarymilling Head Based on Experimental Parameter

YANG Zhe^1,2, LIU Chengying^1,2

1. Department of Manufacturing Engineering, Tsinghua University, Beijing 100084;
2. Beijing Key Laboratory of Precision/ultra-precision Manufacturing Equipment and Control, Tsinghua University, Beijing 100084

Received:2019-10-09 Revised:2020-02-28 Online:2020-09-05 Published:2020-10-19

摘要/Abstract

摘要： 提出一种针对多零部件、大重量级的机床的分块建模、分块试验拟合的建模方法。以摆角铣头为实例，将摆头划分为几个模块，模块之间以结合面、轴承等非固结连接结构为分界，建立起等效的动力学模型；分块进行激励试验，基于试验数据通过优化算法得到结合面及轴承参数。最后整合成整机模型，并通过频响函数预测并验证模型可靠性。相比于先建模、后进行试验验证的传统建模方法，分块建模方法精度更高、能更好地总结误差来源，方便对比研究建模中各种简化方案对最终整机结果的影响，可以推广应用到其他机床。针对摆头模型的特殊性，提出了动态和静态两种模型边界条件，基于此模型对位姿与频响函数的关系分析动静态特性的影响因素，优化摆角铣头结构。

关键词: 摆角铣头, 有限元建模, 动态特性。

Abstract: This research proposes a modeling method for multi-component, heavy-weight machine tools. Take the bi-rotary milling head as an example. First, the bi-rotary head is divided into several modules, and the non-consolidated connection structures such as the joint surface and the bearing are used as the boundary between the modules. An equivalent dynamic model is established and the dynamic equation is solved. Then, the joint surface and bearing parameters are obtained through an optimization algorithm based on the experimental data. Finally, the machine model is integrated, and the reliability of the model is verified by frequency response function prediction. Compared with the traditional machine modeling method, which does experiments after the completion of modeling, this method can better summarize the sources of errors, and compare the various simplified schemes in modeling. And it can be applied to other machine tools. In addition to the specialty of the bi-rotary head model, dynamic and static model boundary conditions are proposed. Based on this model, the relationship between working angle and frequency response function is explored. The influencing factors analysis of dynamic and static characteristics and Further structural optimization can be done.

Key words: bi-rotary milling head, finite element modeling, dynamic characteristics

中图分类号:

TH122

杨哲, 刘成颖. 基于试验参数拟合的摆角铣头分块建模方法及特性分析[J]. 机械工程学报, 2020, 56(17): 165-172.

YANG Zhe, LIU Chengying. Finite Element Modeling Method and Analysis for Bi-rotarymilling Head Based on Experimental Parameter[J]. Journal of Mechanical Engineering, 2020, 56(17): 165-172.

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基于试验参数拟合的摆角铣头分块建模方法及特性分析

Finite Element Modeling Method and Analysis for Bi-rotarymilling Head Based on Experimental Parameter

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