Английский для сварщиков. Гричин С.В. - 174 стр.

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174
flow of electric current through the area of contact of those surfaces.
Pressure is applied before heating is started and is maintained
throughout the heating period.
UPSETTING FORCE:
The force exerted at the welding surfaces in flash or upset welding.
VERTICAL POSITION:
The position of welding in which the axis of the weld is approximately
vertical. In pipe welding, the pipe is in a vertical position and the
welding is done in a horizontal position.
WANDERING BLOCK SEQUENCE:
A block welding sequence in which successive weld blocks are
completed at random after several starting blocks have been
completed.
WANDERING SEQUENCE:
A longitudinal sequence in which the weld bead increments are
deposited at random.
WAX PATTERN:
Wax molded around the parts to be welded by a thermit welding
process to the form desired for the completed weld.
WEAVE BEAD:
A type of weld bead made with transverse oscillation.
WEAVING:
A technique of depositing weld metal in which the electrode is
oscillated. It is usually accomplished by a semicircular motion of the
arc to the right and left of the direction of welding. Weaving serves to
increase the width of the deposit, decreases overlap, and assists in slag
formation.
WELD:
A localized fusion of metals produced by heating to suitable
temperatures. Pressure and/or filler metal may or may not be used. The
filler material has a melting point approximately the same or below
that of the base metals, but always above 800 °F (427 °C).
WELD BEAD:
A weld deposit resulting from a pass.
WELD GAUGE:
A device designed for checking the shape and size of welds.
WELD METAL:
That portion of a weld that has been melted during welding.
WELD SYMBOL:
A picture used to indicate the desired type of weld.
WELDABILITY:

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