Process characteristics of laser scanning welding of aluminum alloy
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摘要: 为减少6061铝合金激光焊接缺陷，提高焊接过程稳定性，采用大功率固体激光光束扫描焊接的方法进行焊接工艺开发. 结果表明，当工艺参数在扫描幅度为0.5 ~ 0.7 mm，扫描频率为100 ~ 200 Hz范围内时可以获得质量较高的焊缝. 激光扫描焊接可以明显抑制等离子体的生成，其尺寸相对于常规激光焊接的2/3，其面积变化标准差约为常规激光焊接的1/2. 相对于常规激光焊接技术，激光扫描焊接过程中熔池形状稳定保持圆状，匙孔在其中沿逆时针方向稳定运动，其面积约为常规激光焊接中匙孔面积的2倍.Abstract: In order to reduce welding defects and improve the stability of the welding process during 6061 aluminum alloy laser welding, the high power solid state laser weaving welding technology was developed. The results showed that the higher quality welding seam could be obtained when the weaving range was 0.5 ~ 0.7 mm and the weaving frequency was 100 ~ 200 Hz. Laser weaving welding could significantly inhibit the generation of plasma and its size was 2/3 of the conventional laser welding, its area standard deviation was 1/2 of the conventional laser welding. Compared with the conventional laser welding technology, laser weaving welding could maintain a stable molten pool shape, where the keyhole moved steadily along the counter clockwise direction, and the keyhole area was about twice of the conventional laser welding.
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Keywords:
- laser technology /
- laser weaving welding /
- aluminum alloy /
- seam formation /
- welding stability
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