Process behavior and stability in short circuit gas metal arc welding
Process behavior and stability in short circuit gas metal arc welding
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DOI：
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发表时间：
1999
期刊：
影响因子：
2.2
通讯作者：
M. Hermans;G. Ouden
中科院分区：
文献类型：
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作者：
M. Hermans;G. Ouden
本文介绍了短路过渡熔化极气体保护焊的研究结果，着重讨论了焊接过程的稳定性。在不同的条件下进行焊接运行，并且在每次运行期间，连续监测不同的工艺参数。结果发现，在特定的焊接条件下达到最大的工艺稳定性。在该最大值之外，不规则的材料转移发生，具有明弧熔滴转移的趋势，或者焊丝在焊池中的熔化开始发生，伴随着高度不规则的熔化行为。结果表明，焊接过程的稳定性与熔池振荡直接相关。更具体地说，当短路频率等于焊接熔池的振荡频率时，工艺稳定性最大。在这些条件下，焊接熔池在每次振荡时接触电极末端的熔滴，这导致规则的熔滴过渡和整个焊接过程的高稳定性。
In this paper, the results of an investigation dealing with short circuit gas metal arc welding with the emphasis on process stability are presented. Welding runs were made under different conditions and, during each run, the different process parameters were continuously monitored. It was found that maximum process stability is reached under specific welding conditions. Outside this maximum, either irregular material transfer takes place with a tendency for open arc droplet transfer or stubbing of the welding wire in the weld pool starts to occur, accompanied by highly irregular melt-off behavior. The results show that process stability is directly related to weld pool oscillation. More specifically, it appears that process stability is maximum when the short circuit frequency equals the oscillation frequency of the weld pool. Under these conditions, the weld pool touches the droplet at the end of the electrode at every oscillation, which results in regular droplet transfer and high stability of the overall welding process.