WELDING
BASE OF BODY REPAIR
9-10
The MIG welding done around the doors, wheelhouse arches,
etc., to prevent the flanges from coming undone after hemming
work is also called MIG spot welding.
PLUG WELDING
CAUTION
In order to prevent the formation of blowholes, fill in each
hole completely in one pass.Be sure that the two panels
are in perfect contact.Be sure that the penetration goes all
the way to the bottom panel.
Plug welding is done by making holes 5 to 6 mm (0.2 inch) in
diameter in one of the panels to be welded together, positioning
the torch at a right angle to the holes and then filling in the
holes one at a time.
CONTINUOUS WELDING
There are several types of continuous welding: fillet (lap joint)
welding, butt welding, T joint welding, gap welding, etc.; these
are called short-circuit arc welding, and provide a stable arc at
a relatively low current.
.
Torch angle and welding technique
There are two welding techniques: forehand welding and back-
hand welding.
Forehand welding: Penetration is shallow and the bead is flat.
Backhand welding: Penetration is deep and the bead has a
convex shape.
AB200038
AB
AB200040
AB
TORCH
PERFECT
CONTACT
5 TO 6 mm
(0.2 in)
DIAMETER
HOLE
AB200041
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