Common problems and causes of high frequency welding, solutions:
(1) Welding is not strong, desoldering, cold stacking;
Reasons: 1. There is no match between output power, pressure and speed.
2. Strip edge damage or other defects.
Solution: 1 adjust the power; 2 thick material tube blank to change the shape of the groove; 3 adjust the pressing force; 4 adjust the speed.
(2) ripples appear on both sides of the weld;
Reason: The angle of convergence is too large.
Solution: 1 adjust the position of the guide roller; 2 adjust the solid bending section; 3 increase the welding speed.
(3) The weld has deep pits and pinholes;
Cause: There was a burn.
Solution: 1 Adjust the position of the guide roller, add the assembly angle; 2 adjust the power; 3 increase the welding speed.
(4) The weld burr is too high;
Cause: The heat affected zone is too wide.
Solution: 1 increase the welding speed; 2 adjust the power.
(5) slag inclusion;
Cause: The input power is too large and the welding speed is too slow.
Solution: 1 adjust the power; 2 increase the welding speed.
(6) Outer cracks in the weld;
Reason: The quality of the base metal is not good; it is subject to too much squeezing force.
Solution: 1 Guarantee the material; 2 Adjust the pressing force.
(7) wrong welding, lap welding;
Cause: Poor molding accuracy.
Solution: Adjust the unit molding roll.

High-frequency welding is a key process in the production of welded pipes. Due to the systematic influence factors, we still need to explore the experience in the first line of production. Each unit has its design and manufacturing differences, and each operator has different. The habit, that is to say, has the same personality as the crew. We provide this information to everyone, in order to better understand the basic principles of high-frequency welding, so as to better combine their own production practices, summed up the operating procedures suitable for their own units.