MULTIQUIP GAW180 Series, Operation And Parts Manual

Page: 21 / 98

GAW180HE/HEA WELDER-GENSET • OPERATION AND PARTS MANUAL — REV. #1 (10/01/19) — PAGE 21
WELDING TERMS
DEFINITIONS OF WELDING TERMS
1.
Weld
– The unification of metallic parts by heating and
allowing the metals to flow together or by hammering
or compressing with or without previous heating.
2.
Straight Polarity
–
A term for direct current electrode
negative.
3.
Reverse Polarity
–
A term for direct current electrode
positive.
4.
Manual Welding
– A welding operation performed
and controlled completely by hand.
5.
AC or Alternating Current
–
AC is the kind of
electricity, which reverses its direction periodically.
For 60 cycle current, the current goes in one direction
and then in the other direction 60 times in the same
second, so that the current changes its direction 120
times in one second.
6.
DC or Direct Current
– DC is the kind of electricity,
which only flows in one direction. The flow of electricity
is from the power source to the application. In welding,
an arc welding process wherein the power supply is at
the arc is direct current.
7.
ARC Force
– An adjustment that allows the operator
to fine tune the arc characteristics according to job
requirements.
8.
ARC Length
– The distance from the end of the
electrode to the point where the arc makes contact
with the work surface.
9.
ARC Voltage
– The voltage across the welding arc .
10.
ARC Blow
– The deflection of an electric arc from its
normal path because of magnetic forces.
11.
Base Metal (Material)
–
The metal (material) to be
welded, brazed, soldered, or cut.
12.
E-Mode
– The Improves fuel efficiency by allowing
the operator to weld with engine at idle speed at up to
160 amps. Reduces operating costs and noise levels.
13.
Covered Electrode
– A composite fill metal electrode
consisting of a core of a bare electrode or metal-cored
electrode to which a covering sufficient to provide a slag
layer on the weld metal has been applied.
The covering may contain materials providing
such functions as shielding from the atmosphere,
deoxidization, and arc stabilization and can serve as
a source of metallic additions to the weld.
14.
Fillet Weld
–
A weld of triangular cross section joining
two surfaces approximately at right angles to each
other in a lap joint, T-joint or corner joint.
15.
Tack Weld
– A weld made to hold parts of a weldment
for proper alignment until the final welds are made.
16.
Shade Number
–
This number pertains to the
lightness or darkness of the lens in the welding helmet.
Lens number range from 2 to 14 where 2 would be the
lightest lens and 14 would be the darkest lens.
17.
CC or Constant Current
–
In this mode the
amperage or current stays constant, but the direct
current voltage will change depending on the arc
length. This mode is applied to SMAW, FCAW and
GTAW processes.
18.
CV or Constant Voltage
– In this mode the direct
current voltage stays constant, but direct current
amperage will change slightly. This mode is applied
to GMAW, FCAW and GTAW.
19. Parallel Connection – Simply connect the positive
terminals together, then connect the negative terminals
together. Make sure that the machines are located as
close together as possible.
Welding cables should be sized appropriately to handle
the additional amperage. Rheostats must be set at
the same amperage or as close as possible. (Note:
Unlike competitive models, no parallel box is needed
with Multiquip Power machines.)
WELDING PROCESSES
„
SMAW – Shielded-Metal Arc Welding
„ FCAW – Flux-Cored Arc Welding
„ GMAW – Gas-Metal Arc Welding
„ GTAW – Gas-Tungsten Arc Welding
„ ACAC – Air Carbon Arc Cutting