Generally speaking, weak spot welding is also a common problem. Before solving such problems, we must figure out what causes such failures?

　　1. The temperature of the automatic spot welding machine is too high

　　1. Check whether the insulation resistance between the electrode holder and the body is bad, causing a local short circuit.

　　2. Check whether the feed water pressure, flow, and temperature are appropriate, whether the system is blocked by dirt, or the electrode arm and other parts are overheated due to poor cooling.

　　3. Check whether the contact surface of the copper soft connection, electrode tip, etc. is seriously oxidized, which causes the contact resistance to increase and the heat is serious.

　　4. Check the thickness of the welding seam and whether the load duration meets the requirements, so that the welder is overloaded and heats up.

　　2. Unwanted spatter during welding

　　1. Check whether the current is too large or too small.

　　2. The strength of the workpiece is not enough, the current is getting smaller and smaller during the welding process, and the welding is not firm.

　　3. The solder joint is not penetrated, and the nugget is poorly formed or not formed.

　　1. When spot welding is not penetrated, no nugget structure similar to "bean-like" is formed. This is very dangerous and will greatly reduce the welding strength.

　　2. Adjust the welding seam adjustment parameters; if the parameters are determined to be correct, you must check whether the main power supply is sufficient and whether the welding transformer is damaged.

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