MOTOR TRUCK SERVICE MANUAL
BODIES AND CABS
WELDING TERMS
Arc Welding: A group of welding processes wherein coalescence is produced by heating with an electric arc or arcs, with
or without the application of pressure and with or without the use of filler metal.
Backing: Material (metal, weld metal, asbestos, carbon, granular flux, etc. ) backing up the joint during welding to facilitate
obtaining a sound weld at the root.
Backing Strip: Backing in the form of a strip.
Base Metal: The metal to be welded or cut.
Bead Weld: A type of weld composed of one or more string or weave beads deposited on an unbroken surface.
Bevel: A type of edge preparation.
Beveling: A type of chamfering.
Butt Weld: A weld in a butt joint.
Chamfering: The preparation of a contour, other than for a square groove weld, on the edge of a member for welding.
Chipping: Cut away, break off.
Coalescence: Combine, join together.
Consumable electrode: Welding operation in which the electrode serves as the current carrier and becomes part of the
weld pool.
Continuous Weld: A weld which extends without interruption for its entire length.
Cover Glass: A clear glass used in goggles, hand shields and helmets to protect the filter glass from spattering material.
Crater: A depression at the termination of a weld bead.
Crater Crack: A crack in the crater of a weld bead.
Cylinder: A portable cylindrical container used for transportation and storage of a compressed gas.
Deposition Rate: The weight of metal deposited in a unit of time.
Depth of Fusion: The distance that fusion extends into the base metal from the surface melted during welding.
Face of Weld: The exposed surface of a weld, made by an arc-or gas-welding process, on the side from which welding
was done.
Filler Metal: Metal to be added in making a weld.
Fillet Weld: A weld of approximately triangular cross-section joining two surfaces approximately at right angles to each
other in a lap joint, tee joint or corner joint.
Filter Glass: A glass, usually colored, used in goggles, helmets and hand shields to exclude harmful light rays.
Full Fillet Weld: A fillet weld whose size is equal to the thickness of the thinner member joined.
Fusion: The melting together of filler metal and base metal, or of base metal only, which results in coalescence.
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