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对铝合金直流点焊时正、负电极的不对称烧损现象进行了试验研究，并通过对焊接过程中电参数曲线的分析，指出其原因在于正、负电极与铝板接触区域产热的不同。
The phenomenon of asymmetric burning of positive and negative electrodes during DC spot welding of aluminum alloy was studied. The analysis of the curve of electric parameters in the process of welding showed that the reason is that the positive and negative electrodes have different heat generation in the contact area with the aluminum plate .