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本文采用自制的 CO_2焊电流波形微机控制系统、微机数据采集分析系统等先进手段,对强规范条件下的 CO_2焊飞溅生成机理等问题进行研究,得出了初步规律。实验研究分析结果表明,瞬间短路与再引燃时的电弧冲击是强规范条件下 CO_2焊飞溅的主要产生原因。研究还表明,在短路过渡开始瞬间及结束后瞬间施加电流负脉冲能明显减少 CO_2焊飞溅。
In this paper, self-made CO_2 welding current waveform microcomputer control system, computer data acquisition and analysis system and other advanced methods, the strong normative conditions of CO_2 welding spatter formation mechanism and other issues were studied, and the initial law was obtained. Experimental results show that the arc impact during short-circuit and re-ignition is the main cause of CO_2 welding splatter under strong standard conditions. The study also shows that applying a negative current pulse instantaneously at the beginning of the short-circuit transition and after the short-circuit transient can significantly reduce the CO_2 weld spatter.