Reasons and prevention methods for incomplete welding of kcf positioning pins

Reasons and prevention methods for incomplete welding of kcf positioning pins:

The main reasons for incomplete penetration are small groove angles, small gaps, or thick blunt edges of the welded joint, low flame energy efficiency, or fast welding speed, too fast heat dissipation speed of the weldment, and short time of molten pool existence, resulting in insufficient fusion with the base metal. The prevention method is to choose the correct groove form and appropriate welding assembly gap, and to eliminate dirt and slag on both sides of the groove and between the welding layers. The appropriate flame energy rate and welding speed should be selected. For welding parts with fast heat conduction and large heat dissipation surface, preheating before welding or heating during the welding process is required.