Prestressed brake drum or rotor

Details Prestressed brake drum or rotor Prestressed brake drum or rotor

1994-10-04

1997-09-09

Oberleitner, Robert J.

Brakes

Elements

Brake wheels

188 78, 188325, 72 53, B21D 5334, F16D 6510

Patent

active

056646488

ABSTRACT:
Uniformly distributed compressive stresses are induced in the machined surfaces of brake drums and brake rotors. The compressive stresses cancel residual tensile stresses induced in the surfaces by machining operations during fabrication. Cancellation of the surface tensile stresses delays formation of cracks during service brake use and extends the service life of the brake drum or rotor. Shot peening is an applicable prestressing process which also imparts a surface roughness that reduces the time required to burnish brake pads to match the shape of the drum or rotor surface. The reduction of burnishing time reduces the amount of surface cracking caused by surface heating by brake pad high spots as the high spots are ground down.

REFERENCES:
patent: 3630323 (1971-12-01), Hickle
patent: 4364456 (1982-12-01), Colpaert
patent: 4756392 (1988-07-01), McMunay
patent: 4930606 (1990-06-01), Sporzynski et al.
patent: 4995481 (1991-02-01), Temple et al.
patent: 5193375 (1993-03-01), Meister
patent: 5325941 (1994-07-01), Farinacci
patent: 5352305 (1994-10-01), Hester
patent: 5383537 (1995-01-01), White
patent: 5385216 (1995-01-01), Kulczycki

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