Английский для сварщиков. Гричин С.В. - 166 стр.

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166
POKE WELDING:
A spot welding process in which pressure is applied manually to one
electrode. The other electrode is clamped to any part of the metal much
in the same manner that arc welding is grounded.
POROSITY:
The presence of gas pockets or inclusions in welding.
POSITIONS OF WELDING:
All welding is accomplished in one of four positions: flat, horizontal,
overhead, and vertical. The limiting angles of the various positions
depend somewhat as to whether the weld is a fillet or groove weld.
POSTHEATING:
The application of heat to an assembly after a welding, brazing,
soldering, thermal spraying, or cutting operation.
POSTWELD INTERVAL:
In resistance welding, the heat time between the end of weld time, or
weld interval, and the start of hold time. During this interval, the weld
is subjected to mechanical and heat treatment.
PREHEATING:
The application of heat to a base metal prior to a welding or cutting
operation.
PRESSURE CONTROLLED WELDING:
The making of a number of spot or projection welds in which several
electrodes function progressively under the control of a pressure
sequencing device.
PRESSURE WELDING:
Any welding process or method in which pressure is used to complete
the weld.
PREWELD INTERVAL:
In spot, projection, and upset welding, the time between the end of
squeeze time and the start of weld time or weld interval during which
the material is preheated. In flash welding, it is the time during which
the material is preheated.
PROCEDURE QUALIFICATION:
The demonstration that welds made by a specific procedure can meet
prescribed standards.
PROJECTION WELDING:
A resistance welding process between two or more surfaces or between
the ends of one member and the surface of another. The welds are
localized at predetermined points or projections.
PULSATION WELDING:

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