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以一种中碳超高强度钢板为试验材料,进行了CO2激光-熔化极活性气体保护焊(Metal active gas,MAG)电弧复合焊接和单独MAG焊接试验。采用高速摄像系统观测熔滴过渡形式的变化,并采集焊接过程中的电弧和熔滴过渡的图像,通过采集到的图像深入分析熔滴过渡的电磁收缩力的计算。研究表明,不同的熔滴过渡形式电磁收缩力的计算方法不同;随着焊接电流的增加,熔滴过渡形式由大颗粒过渡变为小颗粒过渡,减小了熔滴过渡的直径;激光的加入影响了熔滴的电磁收缩力,通过试验分析出不同熔滴过渡形式下激光-电弧复合焊熔滴过渡的电磁收缩力的计算公式。
A medium carbon super high strength steel plate was used as the test material to carry out the CO2 laser - melting active gas metal arc welding (MAG) and single MAG welding test. A high-speed camera system was used to observe the changes of the droplet transfer forms. The images of arc and droplet transfer during the welding process were collected. The collected images were used to analyze the calculation of the electromagnetic shrinkage force. The results show that the different methods of calculating the electromagnetic contractile force in the form of droplet transfer are different. With the increase of welding current, the droplet transition forms from large particle transition to small particle transition, which reduces the diameter of droplet transfer. The electromagnetic shrinkage force of the droplet is affected, and the formula for calculating the electromagnetic shrinkage force during the droplet transfer of the laser-arc hybrid welding under different droplet transfer forms is analyzed through experiments.