With the prevalence of rural electric welding machines, some people are eager to save money, labor and time, and some agricultural machinery parts that should not have been repaired by welding are also repaired by electric welding. The common ones are: Axis-head thread slide fasteners, parts can not be fixed, welded by electric welding; upper and lower box bolts can not be fixed, welded by electric welding and so on. Welding is almost a universal repair method. Blindly welding parts with electric welding can solve some of the immediate problems, but in the long run, it is a kind of behavior that has more harm than good. Because it not only damages the existing technical performance of components, but also affects the subsequent inspection and adjustment of components. Therefore, welding welding as a universal repair method is not desirable.
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