Method of making a brake drum ring
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United States of America Patent
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Nov 21, 2000
Grant Date -
N/A
app pub date -
Jul 30, 1999
filing date -
Jul 30, 1999
priority date (Note) -
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Abstract
The invention is a method of manufacturing a composite drum ring and a composite brake drum having a drum ring. The invention is a method of manufacturing a brake drum ring. An annular band is provided, which is formed by any suitable known method. A cast metal insert is cast in the radially inner surface of the band. Upon casting the molten metal is cooled to an initial solidification temperature to at least partially solidify the molten metal, followed by hot rolling the drum band to reduce the roundness run out of the composite drum ring. The hot rolling operation includes rotating the drum band, providing a roll forming roll and applying the roll forming roll against the radially outer surface of the rotating drum band. A feedback sensor may by provided for determining the roundness run out of the composite drum ring. The hot rolling step may include adjusting the force applied to the roll forming roll in proportion to the roundness run out.
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