2
2-3. Stud welding and spot welding
2-3-1. stud welding
（
Diagram 1
）
Contact type:
When mounting the stud, the stud extend the three support legs about 2mm. Confirm the stud welding position.
Press the support legs on the work piece steady. Make sure the work piece is smooth and clean. Press the torch
trigger, the stud screw will be welded on the base metal immediately. Check the stud welding strength. If the
strength is not enough, please adjust the torch pressure. The work process is electric discharge, stud welding and
recharge, repeat the steps.
Traditional method
，
such as rivets, lock screw and common welding, they must damage the base metal. But the
stub welding does not damage the base metal.
2-3-2. Spot welding
Diagram 2
This is special spot welding function. It does not heat affect the back of work piece.
The back of the work piece is good appearance.
2-4. Stud welding visual test
Please refer to the picture as follow, and assessment the stud welding results.
If the stud welding results are not good. Please refer to Part 2-7, and adjust the charge voltage, torch head pressure
or torch head height, according as the standard.(Note: only adjust one part at a time.)
1.Voltage not enough
2.Correct voltage
3.Too high voltage
1. Washer contact to work piece
2. Discharge-arc
3. Finish welding
1.The stud screw press the
base metal
2. electric discharge,
start arc
3. Stud welding
complete
