Welding Terms - MULTIQUIP GAW180HE Operation And Parts Manual

DEFINITIONS OF WELDING TERMS
Weld
– The unification of metallic parts by heating and
1.
allowing the metals to flow together or by hammering
or compressing with or without previous heating.
Straight Polarity
2. – A term for direct current electrode
negative.
Reverse Polarity
– A term for direct current electrode
3.
positive.
Manual Welding
– A welding operation performed
4.
and controlled completely by hand.
AC or Alternating Current
5.
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.
DC or Direct Current
6.
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.
ARC Force
7. – An adjustment that allows the operator
to fine tune the arc characteristics according to job
requirements.
ARC Length
8. – The distance from the end of the
electrode to the point where the arc makes contact
with the work surface.
ARC Voltage
– The voltage across the welding arc.
9.
ARC Blow
10. – The deflection of an electric arc from its
normal path because of magnetic forces.
Base Metal (Material)
11.
welded, brazed, soldered, or cut.
E-Mode
12. – 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.
Covered Electrode
13.
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.
GAW180HE/HEA WELDER-GENSET • OPERATION AND PARTS MANUAL — REV. #1 (10/01/19) — PAGE 21
– AC is the kind of
– DC is the kind of electricity,
– The metal (material) to be
– A composite fill metal electrode

WELDING TERMS

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.
Fillet Weld
14. – 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.
Tack Weld
15. – A weld made to hold parts of a weldment
for proper alignment until the final welds are made.
Shade Number
– This number pertains to the
16.
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.
CC or Constant Current
17.
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.
CV or Constant Voltage
18.
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
– In this mode the
– In this mode the direct