刘普,李京龙,熊江涛,等.6061铝合金回填式搅拌摩擦点焊过程的数值模拟[J].精密成形工程,2019,11(6):101-107.
LIU Pu,LI Jing-long,XIONG Jiang-tao,et al.Numerical Simulation of Refill Friction Stir Spot Welding of 6061 Aluminum Alloy[J].Journal of Netshape Forming Engineering,2019,11(6):101-107. |
| 6061铝合金回填式搅拌摩擦点焊过程的数值模拟 |
| Numerical Simulation of Refill Friction Stir Spot Welding of 6061 Aluminum Alloy |
| 投稿时间：2019-08-31 修订日期：2019-11-10 |
| DOI：10.3969/j.issn.1674-6457.2019.06.015 |
| 中文关键词: 6061铝合金 回填式搅拌摩擦点焊 数值模拟 温度循环 温度场 |
| 英文关键词: 6061 aluminum alloy refill friction stir spot welding numerical simulation temperature cycle temperature field |
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| 中文摘要: |
| 目的 研究回填式搅拌摩擦点焊的产热机理。方法 利用DEFORM-3D有限元软件对焊接过程进行了数值模拟，得到了不同位置的温度循环和不同时刻的温度场，并通过改变搅拌头转速，研究了不同转速下接头的温度循环和温度场。结果 在套筒达到最大下扎深度附近测试点温度最高，最高温度分布在套筒下方金属；在水平方向，离焊点中心越近，温度上升速率越快，峰值温度越高，在厚度方向，温度循环变化不大；随着搅拌头转速增加，测试点温度上升速率增大，峰值温度升高。结论 通过数值模拟方法可以获得回填式搅拌摩擦点焊接头的温度场和温度循环，为研究其产热机理提供理论指导。 |
| 英文摘要: |
| The paper aims to study the heat generation mechanism of refill friction stir spot welding. The welding process was simulated by DEFORM-3D finite element software to obtain the temperature cycle at different positions and the temperature field at different moments, and study the temperature cycle and temperature field of the joints at different speed by changing the speed of the stirring head. The results show that the temperature of test point near the maximum plunge depth of the sleeve was the highest, and the highest temperature was distributed under the sleeve. In the horizontal direction, the closer to the center of the weld, the faster the temperature rise rate and the higher the peak temperature. In the thickness direction, the temperature cycle did not change much. With the increase of the rotational speed, the temperature rise rate of test point and the peak temperature increased. The temperature field and temperature cycle of refill friction stir spot welding can be obtained by numerical simulation, which provides theoretical guidance for studying the heat generation mechanism. |
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