Reducing residual distortion of thin-plate weldments by rotating extrusion
来源期刊：中南大学学报(英文版)2013年第4期
论文作者：LI Jun(李军) YANG Jian-guo(杨建国) FANG Hong-yuan(方洪渊) ZHANG Wen-feng(张文锋)
文章页码：859 - 865
Key words：welding distortion; thin plate; aluminum alloy; rotating extrusion
Abstract: A new method named rotating extrusion was developed to mitigate residual distortion of thin-plate weldments. the basic principle and characteristic of rotating extrusion as well as an efficient rotating extrusion device were introduced. Systematic trials were conducted to investigate the influence of several technological parameters including the distance between the extrusion tool and welding torch, the pressure acting on weldment, the dimension of the extrusion tool and its rotational speed on distortion control effect. Experimental results show that, as for 2A12T4 aluminum alloy weldment with 2 mm in thickness, 150 mm in width and 350 mm in length, when appropriate technological parameters are adopted, rotating extrusion can reduce its buckling deflection to below 3% of the original value. Implementing rotating extrusion during welding with an extrusion tool more than 100 mm away from the welding torch may achieve better distortion mitigation effect.
LI Jun(李军)1, 2, YANG Jian-guo(杨建国)1, FANG Hong-yuan(方洪渊)1, ZHANG Wen-feng(张文锋)2
(1. State Key Laboratory of Advanced Welding and Joining (Harbin Institute of Technology),
Harbin 150001, China;
2. Zhejiang Yinlun Machinery Company Limited, Tiantai 317200, China)
Abstract:A new method named rotating extrusion was developed to mitigate residual distortion of thin-plate weldments. the basic principle and characteristic of rotating extrusion as well as an efficient rotating extrusion device were introduced. Systematic trials were conducted to investigate the influence of several technological parameters including the distance between the extrusion tool and welding torch, the pressure acting on weldment, the dimension of the extrusion tool and its rotational speed on distortion control effect. Experimental results show that, as for 2A12T4 aluminum alloy weldment with 2 mm in thickness, 150 mm in width and 350 mm in length, when appropriate technological parameters are adopted, rotating extrusion can reduce its buckling deflection to below 3% of the original value. Implementing rotating extrusion during welding with an extrusion tool more than 100 mm away from the welding torch may achieve better distortion mitigation effect.
Key words:welding distortion; thin plate; aluminum alloy; rotating extrusion
