Improvement of spot welding machine
1. Lack of reliable nondestructive testing methods. Welding quality can only be checked by destructive testing of process samples and weldments and various monitoring techniques.
2. Spot welding and seam welding lap joints not only increase the weight of the parts, but also form an angle around the nugget between the two plates, so the tensile strength and fatigue strength of the joints are low.
3. The high power, mechanization and automation of the equipment increase the cost of the equipment. It is difficult to maintain, and the commonly used high-power single-phase AC welding machine is not conducive to the normal operation of the power grid, so it needs to be distributed separately.
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