高强钢三明治板T形接头焊剂片约束电弧焊电弧行为
Arc behavior of flux bands constricting arc welding for high strength steel sandwich panels T-joints
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摘要: 文中基于高速摄像和焊接电信号采集系统，对焊剂片约束电弧焊接高强三明治板T形接头过程中的电弧行为进行了研究. 结果表明，通过焊剂片约束电弧焊接工艺可实现三明治板的加工制造，焊剂片在焊接过程中不仅有效解决了电弧攀升问题，还改变了电弧形貌与加热特性，显著增加了电弧稳定性；将电弧电压控制在23~29 V，焊接电流控制在240~320 A，坡口宽度控制在5~7 mm，在此工艺参数范围内，焊剂片熔化高度适中，电弧可获得良好的约束，电弧到坡口底部的距离与电弧到面板侧壁的距离相当，主要在坡口底部及侧壁根部稳定燃烧，可获得面板与芯板熔合良好T形接头.Abstract: The arc behavior of high-strength camera and welding electric signal acquisition system in the process of constrained arc welding of high-strength sandwich plate T-joints were studied. The results showed that the flux bands not only effectively solves the arc climbing problem in the welding process, but also changes the arc shape and heating characteristics, and significantly increases the arc stability; when the arc voltage is controlled at 23~29 V, and the welding current is controlled at 240~320 A, the groove width is controlled at 5~7 mm. Within the range of process parameters, the flux bands has a moderate melting height, and the arc can be well constrained. The distance from the arc to the bottom of the groove is equivalent to the distance from the arc to the side wall of the panel, mainly on the slope. The bottom of the mouth and the root of the side wall are stably burned, and a good T-joint with a fusion of the panel and the core plate can be obtained.
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