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49
reliability. Applications include extensive use on lead bonding to integrated
circuitry, transistor canning, and aluminum can bodies.
Explosive welding
Explosive welding takes place when two plates are impacted together
under an explosive force at high velocity. The lower plate is laid on a firm
surface, such as a heavier steel plate. The upper plate is placed carefully at an
angle of approximately 5° to the lower plate with a sheet of explosive
material on top. The charge is detonated from the hinge of the two plates, and
a weld takes place in microseconds by very rapid plastic deformation of the
material at the interface. A completed weld has the appearance of waves at
the joint caused by a jetting action of metal between the plates.
Vocabulary
cold welding
lapped joints
холодная сварка (в вакууме)
соединение внахлестку
diffusion bonding диффузное соединение
ultrasonic welding ультразвуковая сварка
explosive welding сварка взрывом
butt стык
anvil наковальня
honeycomb пористый
fin ребро, пластина
finished готовый, обработанный
integrated circuitry интегральная схемотехника
pneumatic tooling пневматический инструмент
punch presses пресс-штамп
13 Fill in the blanks with the right words (namely, types of welding).
1. …welding is successfully used in manufacture of small elements of
electric circuits.
2. Heat is not used in … welding.
3. … is widely used in aerospace industries.
4. Vibration is used in …welding.
5. Plastic deformation is the basic principle in … welding.
6. … welding is impossible without pressure and high temperature.
7. In … welding one of the parts being welded revolves.
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