The most common solder joint quality problem is the joint strength is not enough, the main influence factors and treatment methods are as follows:
1, check the spot welder, touch welding electrode pressure is too small
2, check the welding energy is too small to poor contact. Check whether the electrode rod fastening well. Welding workpiece is corroded seriously.
3, check whether between the electrode head and electrode skewer, electrode pole and the electrode arm oxide too much.
4, check whether the electrode head section increases because of wear and tear, causing welding energy decrease.
Combining the 5, check the electrode and the copper wire surface is serious oxidation. Repair, change parts, adjust according to the fault position check out, to ensure the strength of the solder joint.