High Rotation Speed Friction Stir Welding for 2014 Aluminum Alloy Thin Sheets
High Rotation Speed Friction Stir Welding for 2014 Aluminum Alloy Thin Sheets
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2014年铝合金薄板高转速搅拌摩擦焊
DOI：
10.1007/s11665-017-2524-y
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发表时间：
2017-03-01
影响因子：
2.3
通讯作者：
Dong, Jianghui
中科院分区：
文献类型：
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作者：
Chen, Shujin;Zhou, Yang;Dong, Jianghui
在这项研究中，在高旋转速度的条件下，通过摩擦搅拌焊接（FSW）机器人成功焊接了2014年厚度为1 mm的铝合金板。当应用10,000-16,500 rpm的高旋转速度时，获得了较低的轴向压（小于200 N），从而降低了设备的刚度要求。焊接变形是不可避免的，因为高旋转速度很容易导致快速加热速度和不均匀的热输入。激光范围查找器分别测量了由两种冷却方法引起的焊接失真。实验结果表明，在水冷却条件下，焊接失真较小。当旋转速度高达15,000 rpm和50-170 mm/min的焊接速度时，整个焊接过程是可控制的。在较高的旋转速度条件下，焊接缺陷逐渐消失，更稳定的机械性能可以获得高达75％的碱金属（Omega = 16,000 rpm，NU = 110 mm/min）。不同的焊接参数的结果表明，高旋转速度可以增加材料混合并减少轴向力（Z力），并且可以使用FSW机器人使用FSW机器人来使轻质板焊接受益。
In this study, 2014 aluminum alloy sheets with 1 mm thickness are welded successfully by friction stir welding (FSW) robot under the condition of high rotation speed. When the high rotation speed of 10,000-16,500 rpm is applied, the lower axial pressure (less than 200 N) is obtained, which reduces stiffness requirements for equipment. Welding deformation is inevitable because high rotation speed can easily result in rapid heating rate and uneven heat input. The welding distortion caused by two cooling methods is measured, respectively, by laser range finder. The experimental results show that the welding distortion is smaller under the condition of water cooling. When the rotation speed is up to 15,000 rpm and welding speed 50-170 mm/min, the whole welding process is controllable. Under the higher rotation speed condition, the welding defects disappear gradually and more stable mechanical properties can be obtained up to 75% of base metal (ω = 16,000 rpm, ν = 110 mm/min). The results of different welding parameters demonstrate that the high rotation speed can increase material mixing and reduce the axial force (z force), and it can benefit lightweight sheet welding by using FSW robot.