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In
cold rolling the metal is subjected to
forces below its recrystallisation temperature
to give it a desired shape. In cold rolling the
deformation of metals is brought about by the
process of slip of planes. Cold working results
in better surface finish and close tolerances.
It increases the strength and hardness of a
metal.
The
various methods of cold working are:
Shearing:
a) Blanking b) Punching c) Trimming d)
Broaching e) Burnishing etc.
Drawing:
a) Blank drawing b) Wire drawing c) Spinning
d) Embossing e) Bulging
Squeezing:
a) Cold
rolling b) Sizing c) Stamping d) Coining e)
Rivetting
Bending:
a) Roll forming b) Seaming c) Angle bending
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