US 6,148,498 A · Method of making a brake drum ring

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.

Claims23

Dependent claims

A method of manufacturing a composite drum ring, comprising:

a) providing an annular drum band with a radially inner surface;
b) delivering molten metal to the radially inner surface to form a composite drum ring;
c) cooling the molten metal to an initial solidification temperature to at least partially solidify the molten iron;
and
d) hot rolling the composite drum ring to reduce the roundness run out of the drum ring.

2 more elements

Dependencies are inferred from the claim text.

Method of making a brake drum ring

Life of this patent

Method of making a brake drum ring

Life of this patent

Abstract

Claims23