Creating A Weld; Forehand Welding; Backhand Welding - Parkside PFDS 120 A2 Bedienungs- Und Sicherheitshinweise

Commissioning
Increase the wire feed rate or switch to
„
a lower welding current. If the welding cu-
rrent is too high, the wire will melt before it
even reaches the weld pool. This results in
droplet formation on the welding wire as
well as splash and an irregular electric arc.
The slag must only be removed from the
„
weld after cooling off. To continue welding
on an interrupted weld:
First remove the slag at the starting point.
„
The electric arc is ignited in the weld
„
groove, guided to the continuation point,
melted properly and finally the weld is
continued.
CAUTION! Note that the torch always
must be put down on an insulating support
after welding.
Always switch off the welding device af-
„
ter completing welding work and during
breaks and pull the plug from the mains
socket.
z Creating a weld

Forehand welding

Push the torch forwards.
Result: The penetration depth is lower,
broader weld width, flatter weld bead (visi-
ble surface of the weld) and greater fusion
error tolerance (defect in material fusion).
Backhand
welding
The torch is dragged from the weld. Result:
Greater penetration depth, narrower weld
width, higher weld bead and lower fusion
error tolerance.
Welded joints
There are two-basic types of joints in wel-
ding: Butt welds (outer edge) and fillet welds
(inner edge and overlapping).
Butt welds
With butt welds of up to 2 mm, the weld
edges are completely brought together.
For greater thicknesses, please proceed as
20
GB / CY
per the following table:
S
Flat butt welds
Welds should be made without interruption
and with a sufficient penetration depth. The-
refore, it is extremely important to prepare
them well. The factors that influence the qua-
lity of the weld result are: the amperage, the
distance between weld edges, the inclination
of the torch and the corresponding diameter
of the welding wire.
The steeper you hold the torch against the
workpiece, the higher the penetration depth
and vice versa.
T
To forestall or reduce deformations that can
happen during the material hardening pro-
cess, it is good to fix the workpiece with a
device. Avoid stiffening the welded structure
to prevent cracks in the weld. These pro-
blems can be avoided if there is a possibility
of turning the workpiece so that the weld
can be carried out in two passes running in
opposite directions.