Prestressed brake drum or rotor

Details Prestressed brake drum or rotor Prestressed brake drum or rotor

F - Mech Eng,Light,Heat,Weapons

16

D

F16D 51/00 (2006.01) F16D 65/10 (2006.01) F16D 65/12 (2006.01) F16D 69/00 (2006.01) F16D 69/04 (2006.01)

Patent

CA 2079060

12 ABSTRACT OF THE DISCLOSURE Uniformly distributed oompressive 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 brake service 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 bake 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.

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