⑴ Weak welding, desoldering, cold folding;
Reason: The output power and pressure are too small.
Solution: 1 adjust the power; 2 adjust the extrusion force.

⑵ There are ripples on both sides of the weld;
Reason: The opening angle is too large.
Solution: 1 adjust the position of the guide roller; 2 adjust the solid bending section; 3 increase the welding speed.

⑶The weld has deep pits and pinholes;
Reason: Overburning occurred.
Solution: 1 adjust the position of the guide roller and increase the opening angle; 2 adjust the power; 3 increase the welding speed.

⑷The weld burr is too high;
Reason: The heat affected zone is too wide.
Solution: 1 increase the welding speed; 2 adjust the power.

⑸ Slag inclusion;
Reason: The input power is too large and the welding speed is too slow.
Solution: 1 adjust the power; 2 increase the welding speed.

⑹External cracks in the weld;
Reason: The quality of the base metal is not good; it is subjected to too much squeezing force.
Solution: 1 guarantee the material; 2 adjust the extrusion force.

⑺Wrong welding, lap welding
Reason: Poor molding accuracy.
Solution: Adjust the forming mold roll of the unit.