Multi-grade aluminum laser welded clutch components

摘要

A clutch housing for an automatic transmission includes an aluminum hub and a drum portion which is laser or friction welded to the hub. Due to the different strength requirements of the hub and drum, the hub is fabricated of 6082-T6 aluminum or a material of similar strength and malleability and is forged or die cast. The hub includes male splines or gear teeth disposed on its periphery. The cylindrical drum is fabricated of 7075-T6 aluminum or a material of similar or greater strength and similar malleability and is roller died or stamped and includes female splines or gear teeth on its inner surface as well as a plurality of radially oriented lubrication openings or slots which facilitate flow of lubricating fluid from the interior to the exterior of the cylindrical drum.

主权项

1. A clutch housing assembly comprising, in combination,
a clutch hub having a first diameter, a periphery including a plurality of male splines, a first outer circular surface, a collar having a second diameter smaller than said first diameter and including at least one oblique lubrication passage, a cylindrical drum of a third diameter larger than said first diameter and having an inner surface including a plurality of female splines, at least one circular channel adapted to receive a retaining ring and a second outer circular surface aligned with said first outer circular surface, and a weld disposed between said first and second outer circular surfaces.