What are the causes of spot welding machine welding is not firm?

Generally speaking, spot welding machine welding is not strong is also a relatively common problem, before solving such problems, we must figure out what causes such failures?

1. automatic spot welding machine temperature is too high

1, check the electrode holder and the body of the insulation resistance between the bad, resulting in local short circuit.

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

3. Check whether the contact surfaces of copper soft connection and electrode head are seriously oxidized, resulting in increased contact resistance and serious heating.

4. Check the weld thickness and whether the load duration rate meets the requirements, so that the welding machine is overloaded and generates heat.

2. should not be splashed 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. solder joint is not penetrated, and nugget formation is poor or not formed.

1. No "bean-like" nugget structure is formed during spot welding without penetration. 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, it is necessary to check whether the main power supply is sufficient and whether the welding transformer is damaged.

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