1, crimping: the surface has no obvious indentation, no crack, the ink layer does not fall off. The interface is flat and tight. The interconnection error between the patterns on both sides of the interface is not more than 0.5mm.
2, resistance welding: the whole weld surface is smooth and beautiful, the lap is uniform, the solder joint is evenly connected, the feel is not obvious burr, there should be no bad welding and breakdown phenomenon.
3, the weld joint should be uniform and spot connected, there should be no cold welding, missing welding and pinholes, the inside weld should not have splash points.
4, the weld should be able to withstand normal flanging, reinforcement, neck shrinkage and expansion processing operations, and pass the weld strength test. Welding should not damage the outer iron print pattern.
5, the weld is located in the middle of the white side, and the deviation of the overlap quantity at both ends shall not be greater than 10%.
6, weld tensile strength is not lower than the body tensile strength. The dislocation of both sides of the weld end should not be greater than 0.5mm; The tail of the weld end should not be greater than 0.5mm.
7, nitriding: weld nitriding is good, no yellow, black.
METLINK TECHNOLOGY CO., LTD
