| 摘要: |
| 对铝合金薄板激光单光点和双光点焊接(包括不填丝和填丝)的焊缝成形、对接间隙和准直度容许裕度以及气孔状况进行了比较,并分析了双光点能量分布的激光对铝合金焊接的影响。结果表明,与激光单光点焊接相比,激光双光点焊接铝合金所得焊缝表面质量更好,焊缝熔宽更大,对接间隙和准直度容许裕度明显放宽。激光双光点焊接铝合金可以显著减少焊缝中大气孔的数量,但对焊缝中小气孔数量的影响不明显。此外,填加焊丝可以进一步改善焊缝表面质量并放宽对接间隙和准直度容许裕度,但将增大焊缝产生大气孔的倾向,采用激光双光点焊接仍可使焊缝中大气孔的数量明显减少。 |
| 关键词: 激光焊接 单光点 双光点 填加焊丝 铝合金 |
| DOI： |
| 分类号: |
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| Twin spot laser welding characteristics of aluminum alloy |
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YAO Wei1, GONG Shuili1, STEVE Shi2
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1.National Key Laboratory For High Energy Density Beam Processing Technology, Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China;2.TWI Ltd, Cambridge CB1 6AL, United Kingdom
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| Abstract: |
| Single spot laser and twin spot laser welding of aluminum alloy, with or without wire feeding, were carried out.The weld appearauce, the thresholds of gap width and spot separation, as well as the states of porosity in weld with various laser welding procedures were compared, and the influences of twin spot laser on welding of aluminum alloy were analyzed.It showed that in contrast to single spot laser welding, twin spot laser welding can improve the weld surface quality, and increase the weld width, the thresholds of gap width and spot separation.Twin spot laser can decrease obviously the large gas pore, but can not decrease the small gas pore.In addition, wire feeding in process of welding can improve weld surface quality and increase thresholds of gap width and spot separation further, but increase large gas pore.Twin spot laser welding with wire feeding can decrease the large gas pore. |
| Key words: laser welding single spot twin spot wire feeding aluminum alloy |
