Swaging
is a process that is used to reduce or increase
the diameter of tubes. A swaged piece created
by placing the tube inside a die that applies
compressive
force by hammering radially.
Swaging
can be further expanded by placing a mandrel
inside
the tube
and applying radial compressive forces
on the outer diameter. Thus, throught the
swage process,
the inner tube diameter can be a different
shape,
for
example
a hexagon,
and the outer is still circular. |
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Click
here to view a movie* of Warm Forging
in action. |
Pittsburgh
Tubular Shafting
has developed extensive data relative to the
rotary forging of journals integral to the
tube, used as the roll body. Micrographic analysis
and destructive testing have validated strength
increases in the forged end section resulting
in dramatic grain refinement of the steel structure
affording greater toughness characteristics
typical of the forging process. X-ray defraction
analysis records no residual stresses for the
PTS process which aids holding close tolerances
during the further processing of PTS rolls.
Complete metallurgical data regarding the integrity
of the process and product is available on
request. |
*
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