F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
26/174, 74/245
F16H 55/36 (2006.01)
Patent
CA 1072369
ABSTRACT OF THE DISCLOSURE A sintered pulley hub construction for mounting on a bottom wall of a sheet metal pulley cup. A pair of tubular mem- bers is pressure formed in a green compact state from a metal powder mixture. One of the members has a cylindrical body which terminates at one end in an outwardly extending annular flange which forms a hub pulling flange. The other member has an inter- ior annular cavity formed in one end and a radially outwardly ex- tending annular flange forced on the other end. The cylindrical body of the one member is telescopically received within the annu- lar cavity of the other member. The members are joined by sin- tering to form an integral homogeneous body. The outer surface of the other member has a cylindrical portion extending axially between the radial end flange and an annular shoulder for receiv- ing an axially extending flange of a pulley cup, with the shoulder providing a zone for welding the pulley cup to the hub. The method of forming the improved hub includes the steps of separ- ately pressure-forming each of the tubular members in a green compact state in a pair of molds. Then a cylindrical end portion formed on one of the tubular members is telescopically mounted within an annular interior cavity formed in one end of the other tubular member. The joined members then are sintered in a fur- nace and the green compacted members cohere to each other and form an integral homogeneous member.
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