基于有限元模型的增减材一体化复合制造技术热力耦合研究

doi:10.3901/JME.2022.15.274

机械工程学报 ›› 2022, Vol. 58 ›› Issue (15): 274-282.doi: 10.3901/JME.2022.15.274

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基于有限元模型的增减材一体化复合制造技术热力耦合研究

赵宇辉^1,2,3, 高孟秋^1,2, 赵吉宾^1,2, 王志国^1,2, 何振丰^1,2, 贺晨^1,2

1. 中国科学院沈阳自动化研究所沈阳 110016;
2. 中国科学院机器人与智能制造创新研究院沈阳 110169;
3. 中国科学院大学北京 100049

收稿日期:2021-08-10 修回日期:2022-01-10 出版日期:2022-08-05 发布日期:2022-10-13
通讯作者: 贺晨(通信作者),男,1988年出生,博士,助理研究员。主要研究方向为高性能金属材料激光增材制造工艺与技术。E-mail:hechen@sia.cn
作者简介:赵宇辉,男,1983年出生,博士,副研究员,硕士生导师。主要研究方向为金属材料激光增材制造与修复工艺技术与装备。E-mail:yhzhao@sia.cn
基金资助:
广东省基础与应用基础研究基金（2020B1515120027）和国家自然科学基金（51805526）资助项目。

Study on Thermo Mechanical Coupling of the Hybrid Additive and Subtractive Manufacturing Based on Finite Element Model

ZHAO Yuhui^1,2,3, GAO Mengqiu^1,2, ZHAO Jibin^1,2, WANG Zhiguo^1,2, HE Zhenfeng^1,2, HE Chen^1,2

1. Shenyang Institute of Automation, Chinese Academy of Science, Shenyang 110016;
2. Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Science, Shenyang 110169;
3. University of Chinese Academy of Science, Beijing 100049

Received:2021-08-10 Revised:2022-01-10 Online:2022-08-05 Published:2022-10-13

摘要/Abstract

摘要： 采用高斯移动热源、重启动分析、预定义场以及J-C本构模型等方法，探究了增减材复合制造过程中温度场与应力场的耦合作用，实现了增减材复合制造过程有限元模型的构建并通过实验验证了模型的准确性。研究结果表明，采用高斯线热源方法在降低计算量的同时，还可以保证模型的准确性，而重启动分析与预定义场实现了增减材制造过程工艺的良好衔接；随着温度的降低，应力形式由热应力转变为加工应力，工件表面由残余拉应力转变为残余压应力，表明在增材制造过程中激光加热产生的高温对工件表面应力影响较大；在增材工艺与减材工艺之间的冷却时间延长后，工件表面的残余应力由正值转化为负值，这说明减材工艺的介入时机对工件表面的应力状态有较大影响，选择合适的减材加工温度，有利于降低残余应力对工件的影响。

关键词: 增减材制造, 有限元仿真, 工艺衔接, 热力耦合, 残余应力

Abstract: In order to explore the coupling effect of temperature and stress field in the additive and subtractive manufacturing process, the Gaussian moving heat source, restart analysis, predefined field and J-C constitutive model are constructed and the accuracy of the model is verified by experiments.The results show that the Gauss line heat source method can not only reduce the amount of calculation, but also ensure the accuracy of the model, and the restart analysis and predefined field realize the good connection of the manufacturing process.With the decrease of temperature, the form of stress changes from thermal stress to machining stress, and the workpiece surface changes from residual tensile stress to residual compressive stress, which shows that the high temperature generated by laser heating has a great impact on the workpiece surface stress in the process of additive manufacturing.After extended the cooling time between additive and subtractive manufacturing process, the residual stress on the workpiece surface changes from positive to negative, which shows that the intervention time of material reduction process has a great influence on the stress state on the workpiece surface.In the process of additive manufacturing, selecting an appropriate subtractive manufacturing temperature is conducive to reducing the impact of residual stress on the surface of workpiece.

Key words: additive and subtractive manufacturing, finite element simulation, process connection, thermo-mechanical coupling, residual stress

中图分类号:

TG156

赵宇辉, 高孟秋, 赵吉宾, 王志国, 何振丰, 贺晨. 基于有限元模型的增减材一体化复合制造技术热力耦合研究[J]. 机械工程学报, 2022, 58(15): 274-282.

ZHAO Yuhui, GAO Mengqiu, ZHAO Jibin, WANG Zhiguo, HE Zhenfeng, HE Chen. Study on Thermo Mechanical Coupling of the Hybrid Additive and Subtractive Manufacturing Based on Finite Element Model[J]. Journal of Mechanical Engineering, 2022, 58(15): 274-282.

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基于有限元模型的增减材一体化复合制造技术热力耦合研究

Study on Thermo Mechanical Coupling of the Hybrid Additive and Subtractive Manufacturing Based on Finite Element Model

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