F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
26/174, 74/241
F16H 55/49 (2006.01) B21D 53/26 (2006.01) B21H 1/04 (2006.01)
Patent
CA 1227669
ABSTRACT OF THE DISCLOSURE The present application discloses improvements in a method of manufacturing polyp pulleys and the products. According to the method of the present invention, after the cylindrical peripheral wall of a cup-shape blank produced by drawing a metal plate has been thickened, V-shape grooves having improved precision are formed with a V-shape groove forming roller and an inner groove forming rotary mold being simultaneously applied respectively -to tune outer and inner peripheral surfaces of the cylindrical peripheral wall. The V-shape groove forming roller includes a rolling face having a plurality of parallel V-shape crests divided by steep valleys. The inner groove forming rotary mold has annular V-shape projections in the peripheral direction of the mold at the positions corresponding to the valleys of the forming roller. The invention provides considerable savings in material and labor over prior art devices.
410936
Fetherstonhaugh & Co.
Kabushiki Kaisha Kanemitsu
LandOfFree
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