Английский для сварщиков. Гричин С.В. - 120 стр.

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120
моделирование, ручной инструмент, банк данных, улучшенный
материал (материал с улучшенными свойствами).
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Text 1. Space-Age Welding:
The Past, Present and Future of Aerospace Join Processes
By B.E. Paton
April 10, 2003
On Oct. 16, 1969, astronauts performed the world's first welding and
cutting experiment in a depressurized compartment. In flight aboard the
Soyuz 6 spaceship, they tested three welding processes with a semiautomatic
Vulkan unit (see Figure below): consumable
electrode arc in vacuum, low-pressure plasma, and
electron beam welding. They studied how to weld
aluminum and titanium alloys and stainless steel.
They verified the possibility of thermal-cutting these
materials and investigated the behavior of molten
metal and features of its solidification.
This experiment convinced experts that they
could use automatic welding to produce permanent,
tight joints in space. They expanded this work with a
series of investigations conducted under short-time
microgravity conditions in flying laboratories and
space simulation test chambers. In 1973 NASA
experts conducted a flight experiment with electron
beam cutting, brazing, and welding in the Skylab orbital station.
Space welding technologies have advanced since then. In-space repair
and construction of space facilities and their equipment and instrumentation
were defined in the 1980s. Another major area identified was producing
advanced materials in space with new or improved properties using different
heat sources.
Over the years scientists and specialists had to address construction of
various experimental space vehicles, namely, orbital and interplanetary
stations, radio telescopes, antennas, reflecting shields, and helio power
generation systems - in outer space.
In addition to the original problems of assembly and erection in outer
space, as well as their view of how long these vehicles would be used and
Two cosmonauts conduct
preflight training of a crew with
Vulkan hardware in October
1969

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