Control of Welding Distortion by Welding with Trailing Cooling of Drikold of 1561 Aluminum Alloy Thin Sheet

doi:10.3901/JME.2019.06.067

Abstract

Abstract: At present, with the disadvantages of complex equipment, large space, and inefficient cooling medium, the technology of welding with trailing cooling of driold has been proposed to improve its application in shipbuilding industry. The mean of combining numerical simulation and experimental analysis is implemented to study the distortion control of aluminum alloy sheet during welding with trailing cooling of drikold. The relevant experimental equipment is built to measure the cold source temperature field formed by spraying from nozzle after drikold particles. The established cold source model based on the result of tests is substituted into the corresponding finite element analysis in order to simulate welding process. The effect of cooling distance on residual stress and distortion is studied, and the welding with trailing cooling of drikold is optimized. The results show that the optimal cooling distance is about 40 mm under existing conditions. The longitudinal residual tensile stress decreases by 46.9%, the longitudinal compressive stress decreases by 40.8%, and the welding distortion decreases by 51.5%. The theoretical and experimental results show that the welding with trailing cooling of drikold technology is an effective method to control the welding stress and distortion of thin sheet, which provides a direction for the application of the welding technology in shipbuilding industry.

Key words: aluminum alloy, control of welding distortion, numerical simulation, welding with trailing cooling of drikold

CLC Number:

TG404

YAN Dejun, WANG Sai, ZHENG Wenjian, YU Yang, XIE Hao, ZHONG Meida, ZOU Xiaofeng, YANG Jianguo. Control of Welding Distortion by Welding with Trailing Cooling of Drikold of 1561 Aluminum Alloy Thin Sheet[J]. Journal of Mechanical Engineering, 2019, 55(6): 67-73.

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