Global dynamic robust control of friction stir welding of high strength aluminum alloy

被引：0

作者：

Liu Z. ^{[1
]}

Zhang K. ^{[1
]}

机构：

[1] School of Material Science and Engineering, Shenyang University of Technology, Shenyang

来源：

Hanjie Xuebao/Transactions of the China Welding Institution | 2019年 / 40卷 / 04期

关键词：

7075 superhard aluminum; Friction stir welding; Global dynamic robust control; Welding joint strength;

D O I：

10.12073/j.hjxb.2019400103

中图分类号：

学科分类号：

摘要：

Aiming at the softening problem of 7075 superhard aluminium welded joints such as hot cracks and porosity holes in traditional fusion welding process, a dynamic robust control model based on the relationship between friction stir welding process parameters and welded joint strength was established. According to the non-linear relationship between global motion estimation and welding parameters, a dynamic robust control model of tool pin motion was established, and the tensile shear strength of welded joints were calculated. The physical parameters such as tensile strength and hardness were calculated. A robust dynamic evolutionary optimization model of welding process parameters was established remaining process to realize real-time optimization control of process parameters. A series of strength tests of welded joints based on the model showed that the proposed model was reasonable and could meet the needs of engineering, which have practical value in engineering. © 2019, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.

引用

页码：73 / 78

页数：5

共 8 条

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