1 Introduction Page 5
Stud welding units Operating manual Date: July 2021
INTRA 2100/1400 07.2021 / EN Rev.: A
Process
1. Placing the stud
The stud is inserted into the stud holder and
ceramic ring in the welding gun’s ceramic ring
holder. The tip of the stud rests on the base
material and the welding gun is pressed against
the workpiece until the ceramic ring’s entire
surface lies on the workpiece.
2. Lifting and igniting the arc
When the release button is pressed on the welding
gun, the stud lifts and an auxiliary arc is created.
Then the main arc is ignited; the stud and the base
material fuse.
3. Immersion
After the weld time is over, spring pressure presses
the stud into the liquid weld pool.
4. Welded stud
The bond is created a few tenths of a second after
the release button is pressed. The welding gun is
not pulled from the stud until about 1 second of
dwell time. The melted material is then hardened.
Then the ceramic ring is removed.
Drawn arc process with ceramic ring
(BH 100 KR per DVS 0902)
For this standard process, for every weld, a ceramic ring adapted to the weld stud is
necessary. The ceramic ring concentrates the arc on the weld point and shields the
melt from the ambient air, preventing harmful oxidation of the melt. It holds the melt
together and forms a defined, reproducible weld bead. The ceramic ring also
decreases the cooling speed of the weld point, preventing undesirable hardening of
the base material. Moreover, it protects the welder from the arc and hot weld
splatter.
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