Английский язык для инженеров сварочного производства. Гричин С.В - 111 стр.

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6. Специфика используемого на космических кораблях оборудования
обусловливает необходимость использования, прежде всего, ручной
сварки при частичной автоматизации процесса.
7. Электроннолучевой ручной сварочный аппарат прошел успешные
испытания на орбитальном комплексе в условиях открытого космоса.
8. Использование новейших материалов в следующем столетии
потребует разработки совершенно новых технологий получения
неразъемных соединений.
Reading 2
7 You will read the text What Is Orbital Welding. Before you read think
and say why this type of welding is called “orbital”. Read the opening
paragraph and check your supposition.
Read the text and say what the main advantages of this method are.
What Is Orbital Welding
The term Orbital-Welding is based on the Latin word ORBIS = circle.
This has been adopted primarily by aerospace and used in terms of Orbit
(noun) or Orbital (adjective) for the trajectory of a man-made or natural
satellite or around a celestial body. The combination Orbital Welding
specifies a process by which an arc travels circumferentially around a work
piece (usually a tube or pipe). The concept Orbital Welding is basically a
loosely defined term that is usually used for processes only, where the arc is
travels at least 360 degrees around the work piece without interruption.
Consequently, processes, which interrupt the full 360-weld sequence such as
for better puddle control (often used for MIG/MAG welding, using the down-
hand welding sequence in 2 half-circles), can not truly be called orbital
welding.
Possibilities and Limitations
From welding terminology Orbital Welding belongs to the category
semi-mechanized (TIG-) welding. Because of the need for good control of the
weld puddle, the Orbital-Welding process is only practiced with the TIG
process and relevant rules like selection of gases, cleanness, weldability of
specific materials and consequential mechanical strength specifications such
as tensile and bend loading, are very important.
Orbital-welding is presently used whenever the quality of the weld
joint has the highest priority. These demands are not only limited to
mechanical strength and X-ray qualification, but also to the important aspects

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