汽车板激光扫描焊接工艺研究

为了研究激光扫描焊接汽车板的工艺方法, 采用4kW光纤激光器对0.7mm镀锌板与0.8mm冷轧板SPCC两类汽车板的激光扫描焊接工艺进行了理论分析和实验验证, 得到了板间间隙、激光功率、扫描速率等对焊缝成形及强度的影响规律。结果表明, 当选取板间间隙0.1mm~0.2mm、激光功率3000W~3400W、焊接速率不小于3m/min等适当参量进行焊接时, 焊缝质量可满足电子束及激光焊接接头欠缺质量分级指南C级标准, 且强度高于母材。选取合适的工艺参量时, 激光扫描焊接在无保护气的作用下可得到高质量的焊缝。

Abstract

In order to research the process of laser scanner welding, the laser scanner welding process of 0.7mm galvanized sheet and 0.8mm cold-rolled sheet（SPCC）with a 4kW fiber laser was analyzed in theory and verified in experiments. The influence of the gap between the sheets, laser power and scanning speed on macro-morphology and strength were obtained. The results show that the welded seams achieved by laser parameters of plate gap 0.1mm~0.2mm, laser power 3kW~4kW and welding speed 3m/min have the strength higher than the base metal, and can satisfy the C-class of electron and laser beam welded joints (levels guidance for quality imperfaction). Laser scanner welding can get a high quality welding seam without shielding gas when selecting right parameters.

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祁小勇, 李道金, 叶兵, 王爱华. 汽车板激光扫描焊接工艺研究[J]. 激光技术, 2016, 40(6): 825. QI Xiaoyong, LI Daojin, YE Bing, WANG Aihua. Laser scanner welding processing of automobile panels[J]. Laser Technology, 2016, 40(6): 825.

汽车板激光扫描焊接工艺研究

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