Welding Procedure; Checking The Quality Of The Weld - HBS KAH 412 LA Operating Manual

5.6

Welding Procedure

Improper operation of the stud welding unit is LIFE-THREATE-
NING! The stud welding unit must only be operated by qualified
personnel (see chapter 1).
First read the safety instructions in chapters 1, 3 and 5.
Prepare the stud welding unit, the ground connection, and the workpiece accor-
ding to the instructions given in the operating manual.
Chapter 5 contains guideline for welding parameters. The data
given are only guidelines. They must be verified by trial welds
on the actual workpiece according to actual standards and DVS
regulations (see appendix).
During the actual welding process, you must expect red-hot welding
spatters, possibly liquid spatters, a flash, and a loud bang may occur
> 90dB (A). Inform any collegues who are occupied in the vicinity of
the welder about the bang.
Wear always your personal protective equipment according to actual
standards (see appendix).
The welding process can only be initiated, if the current circuit
is closed, i.e. the welding element is in electrical contact with
the base material.
After the welding process has been completed, withdraw the
welding head straight back from the welding element. If you
remove the welding head at an angle, the chuck will be stret-
ched, this reduces its life expectancy.
You can now insert a new welding element in the chuck and repeat the welding process
as described above.
5.7

Checking the Quality of the Weld

You can check the quality of the weld by means of a visual inspection and a bending
test.
See also actual standards in the appendix "Arc stud welding of
metallic materials", in section irregularities and corrective
actions.
KAH 412 LA Order No. BA 94-37-412 Issue 23.10.08 39