Method and apparatus for making a sheet metal pulley
OwnerEdward A. Kotlarinventor
Life of this patent
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Abstract
A method and apparatus for making a sheet metal pulley having a pair of stamped sheet metal cups with telescopically interfitted side wall portions and integral flanges forming in cooperation with the flanges of rings received on the cups a plurality of V-shaped grooves. A device which engages a side wall portion of at least one of the cups locates and produces pulley mounting holes concentric with the grooves of the pulley and extending through the bottom walls of the cups. The mounting holes are produced prior to a ring being fixed to such side wall portion by a plurality of circumferentially equally spaced spot welds in such ring and side wall portion.
Claims11
The method of producing a stamped sheet metal pulley comprising the steps of:
- telescopically interengaging with an interference fit cylindrical first side wall portions of two stamped sheet metal cups, each cup having an integral flat bottom wall portion and an inclined integral annular flange extending generally radially outwardly adjacent the open end thereof, said cups being interengaged such that their bottom wall portions are in abutting co-planar engagement and said annular flanges are spaced apart axially to each define at least in part a groove of the pulley;
- arranging said interengaged cups between punch and die means for forming a plurality of mounting holes through the bottom wall portions of both cups by engaging the periphery of the side wall portion of at least one of said interengaged cups with concentrically arranged locating means on the punch and die means;
- actuating said punch and die means to form mounting holes through said bottom wall portions of both cups concentric with the central axis of the interengaged cups;
- and
- thereafter welding said side wall portions together.
Dependencies are inferred from the claim text.