Английский для сварщиков. Гричин С.В. - 43 стр.

UptoLike

ВУЗ: 

ТПУ | Томск

Составители: 

Рубрика: 

43
Welding: Joining 2 similar work pieces by melting them together, usually
with an additional filler rod of some sort to take up space. Materials must be
similar.
Cutting: Work is heated to melting point and beyond, and "cut" by oxidizing
metal. (Literally burning it away).
Shield: A barrier to keep oxygen away from heated work to prevent
oxidation. Includes chemical coatings called flux (liquids, pastes, solids,
which may be vaporized into a barrier gas when heated), and inert gasses.
Oxidation of the surfaces will prevent proper bonding of the metals.
Gas Welding
Uses Flame from burning gas to create welding heat.
Propane torch: (Soldering, heating) Good for sweating pipes, starting fires,
and spending hours trying to heat frozen bolts, while the surrounding metal
gets just as hot.
Oxyacetylene torch: (Cutting, welding, brazing, soldering, leading) Most
universal and useful welding tool. (Uses Acetylene gas and Oxygen for hot
flame) With the right bits, rod, and technique, you can weld almost anything.
Good for cutting anything from sheet metal to the turret off a tank, lead
filling, brazing (a sort of hard soldering process) welding plate, welding sheet
metal, welding aluminium, heating frozen bolts, or alternately cutting them
off, drilling holes in plate, welding cast iron, shrinking and forming steel, and
can double as a flame thrower in a pinch. Drawbacks are: Overheating of
some types of work, harder to control quality of some processes.
Oxy-propane: (Soldering, brazing, heating) A cheap compromise between
low cost and portable propane, and Oxy-Acetylene. Better than the former,
not as good as the latter.
Arc welding
Uses an electric arc to create welding heat.
Basic AC & DC arc welders (AC is cheaper) Uses flux coated steel (or
other) rods of various types for different jobs. Makes some of the best welds
on heavy gauge steels and cast iron. Cutting rods can make clean holes
through thick stock, and are about the only thing which can cut Kryptonite
bike locks. Very difficult to weld thin metals. You can also get a carbon arc
torch to use on an arc welder to braze. Eastwood's "stitch" welder is a
gimmick used on an arc welder to buzz the rod in and out, which may help on
thinner stock. (learning how to weld better, or going to a different process is
usually a better idea.)

Страницы