Classification of plasma welding methods
There are three different classes of plasma welding, depending on the current range :
Micro plasma(0.1-15 A). The concentrated arc enables it to remain stable down to a
current of about 0.1 A, which means that the process can be used for welding metal
thicknesses down to about 0.1 mm. This makes the process attractive to, for example,
the space industry.
Medium plasma welding(15-100 A). In this range, the method competes more
directly with TIG welding. It is suitable for manual or mechanised welding and is
used in applications such as the automotive industry for welding thin sheet materials
without introducing distortion or unacceptable welded joints, as are produced by
MIG welding, or for the welding of pipes in breweries or dairies .
The third type of plasma welding is referred to askeyhole plasma welding, taking
its name from the 'keyhole' that is produced when
the joint edges in a butt weld are melted as the plasma jet cuts through them. As the
jet is moved forward, the molten metal is pressed backwards, filling up the joint
behind the jet.
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Date: 2023-04-10 hits: 591 Return
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