Wheel is made up of the rim and the disk. The
main processing technique for rim is roll forming. Punch forming and spin
forming are usually applied for disc. Punch forming is mainly used for disc of
passenger cars, while disc of commercial cars are usually punch-formed (wigh
inner tire) or spin-formed (without inner tire)
Remark : Test piece for tensile test taken
to the rolling direction. Test piece for cold bend test taken transverse to the
rolling direction.
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