Welding Terms and Acronyms



Welding Terms and Acronyms

OAW – Oxyacetylene Welding

SMAW – Shielded Metal Arc Welding aka Stick Welding

TMAW – Tungsten Metal Arc Welding aka TIG (Tungsten Inert Gas) or Heliarc®

GMAW TERMS

GMAW – Gas Metal Arc Welding, aka MIG (Metal Inert Gas) or Wire Feed Welding

FCAW – Flux Cored Arc Welding

AWS – American Welding Society

cfh – Cubic Feet per Hour (when setting the flowmeter for GMAW and TMAW, you need a minimum of 20cfh)

psi – Pounds per Square Inch

IPM – Inches Per Minute (for setting the wire speed on a GMAW welder)

Arc Force – The pressure of the welding process

Arc Gap – The distance between the tip of the electrode and the metal being welded

Penetration – The depth of the weld into the base metal

Porosity – Impurities trapped within the weld, usually caused by not enough shielding gas or dirty base metal.

Stickout – How far the wire “sticks-out” out past the contact tip. Usually no more than 3/8 an inch for GMAW, and 1-1/2 inch for FCAW.

Travel Speed – The rate in which you weld.

Travel Angle – 5 to 15 degrees

Gun Angle – Perpendicular (90°) for a flat weld joint, or half the angle (45° for T-Fillet, etc.)

Shielding Gasses – Commonly used for GMAW is 75% Argon mixed with 25% C02, or 100% CO2. For TMAW 100% Ar is used. For Dual Shield FCAW, either a 75/25 mix or 100% CO2 is used.

Dual Shield – A welding process that uses Flux Cored wire as well as shielding gas.

Forehand – Pushing your welding puddle, giving a shallower penetrating weld.

Backhand – Pulling your welding puddle, giving a deeper penetrating weld.

Inert – A group of gasses that are non-reactive to other elements. These include Helium and Argon (Ar is really a Noble gas).

Duty Cycle – The percentage of welding time that can be done in relation to the percentage of time the welder must rest. A 60% duty cycle welder can weld for 6 minutes, but then it must rest for 4 minutes.

Be able to identify GMAW Welding Parts, Equipment, and Accessories

Contact Tip

Nozzle

Diffuser

Insulator

Liner

Gun

Flowmeter

Cylinder

Drive Wheels

Knurled Drive Wheels

Hub Tension Nut

Wire Spool

Wire Spool Retainer

Anti Spatter Spray

Nozzle Dip

Drive Wheel Tension Knob

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