摆动工艺参数对铝合金激光焊焊接质量的影响

为了研究铝合金激光焊接过程中摆动参数对焊接结果的影响,文章采用单因素的变量试验,在其他参数固定为功率4 kW、焊接速度80 mm/s、离焦量0的情况下,分别分析激光摆动频率、摆动幅度等参数对2 mm厚的6k21和5754铝合金薄板焊缝成型、焊接质量的影响。试验结果表明:随着摆动幅度的增加,焊缝熔深减小,熔宽先增加后减小;随着摆动频率的增加,熔深、熔宽均减小;在焊缝没有焊接缺陷的情况下,试件的剪切力与熔宽成正相关。文章研究结果可为汽车轻量化全铝车身连接中的激光焊接工艺提供一定的理论参考。

In order to study the influence of oscillating parameters on welding quality during laser welding of aluminum alloy, a single factor variable experiment was adopted in this paper, and under the conditions of 4 kW power, 80 mm/s welding speed and 0 defocus, the effects of laser oscillating frequency and oscillating amplitude on weld forming and welding quality of 2-mm-thick 6k21 and 5754 aluminum alloy sheet were analyzed. The experimental results show that with the increase of oscillating amplitude, the weld penetration depth decreased, and the weld width increased first and then decreased. With the increase of oscillating frequency, the weld penetration depth and width decreased. In the absence of welding defects, the shear strength of the specimen was positively correlated with the weld width. The research results can provide theoretical reference for laser welding process of automotive lightweight all-aluminum body connection.