Thermal Arc POWERMASTER 400SP, Руководство по обслуживанию

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POWERMASTER 400SP, 500SP AUTOMATION
6-2 Octobe r 30, 2008
Art # A-06381
Lo n g Arc S hort Arc
B. Length of the wire electrode
The distance between the to r ch and the wo r kpiece
should be 10 – 12 times the diamete r of the wi r e.
Alte r ing the distance of the to r ch will influence the
elect r ode stick out.
A longe r elect r ode stick out r educes the ampe r age
and the penet r ation.
A sho r te r elect r ode stick out inc r eases the ampe r age
if the wi r e-feed speed r emains the same.
Art # A-06382
Lo n g electrode s tick o u t S hort electrode s tick o u t
6.02 Holding and Manipulating the
Torch
NOTE
Metal shielded gas welding can be welded
in all positions: ho
r izontal, ve r tical-down,
ve r tical-up, ove r head and in ho r izontal-
ve r tical position.
When ho r izontal welding, hold the to r ch ve r tical to
the wo r kpiece (neut r al to r ch position) o r up to 30°
“pushing” the to r ch. Fo r best depth of penet r ation
and shielding gas cove r age hold the to r ch in the
neut r al position. Please note that if the to r ch is tilted
too fa r , it is possible that ai r will be sucked into the
shielded gas and may r esult in po r osity. Fo r ve r tical
o r ove r head welding a slight pushing motion is
r equi r ed. Ve r tical down welding is most used fo r thin
mate r ials, hold the to r ch at the neut r al o r slightly
“d r agging” position. Some expe r ience is r equi r ed as
the welding pool could r un ahead of the a r c and cause
weld defects. The r e is a dange r of lacks of fusion with
thicke r mate r ial due to the welding pool being ve r y
liquid f r om high voltage.
Art # A-06380
Weldi n g directio n
p us hi n g the weld
Weldi n g directio n
draggi n g the weld
Avoid ext r eme side to side movements as it can cause
the weld pool to dam up in f r ont of the a r c. This can
cause lacks of fusion due to the welding pool flowing
ahead of the welding a
r c. The side to side motion
should only be used as wide as is necessa r y to r each
both sides of the joint. If the joint is too wide you
should weld two pa
r allel weld beads. When ve r tical-
up welding, the side to side motion should follow the
shape of an open t
r iangle.
A. Length of the arc
Welding with a longe r a r c r educes the penet r ation,
the welding bead is wide and flat with inc r eased
spatte r ing. The welding mate r ial is t r ansfe rr ed with
slightly la r ge r d r ops than welding with a sho r te r a r c.
A longe r a r c is useful fo r welding a fillet weld to fo r m
a flat o r concave seam. Welding with a sho r te r a r c (at
the same ampe r age) inc r eases the penet r ation, the
welding bead is na rr ow and high with r educed
spatte r ing. The welding mate r ial is t r ansfe rr ed with
smalle r d r oplets.