Method for producing wheel rim

Details Method for producing wheel rim Method for producing wheel rim

1990-05-11

1991-01-22

Echols, P. W.

Metal working

Method of mechanical manufacture

Wheel making

29894354, 723542, B21K 138

Patent

active

049859935

ABSTRACT:
A method for producing a wheel rim of an automotive vehicle comprising the steps of supporting a cylindrical body on a vertical axis between an upper punch attached to an upper mold and a lower punch attached to a lower mold; fitting a side die to an outer peripheral surface of the cylindrical body, with the cylindrical body supported; then lowering the upper punch together with the upper mold to insert the upper punch into an upper portion of the cylindrical body and to form the upper end portion of the cylindrical body into the flange portion by press forming between the upper punch and the side die; thereafter releasing the cylindrical body from the supported state at its lower end surface; and further lowering the upper punch together with the side die and the cylindrical body to insert the lower punch into a lower portion of the cylindrical body and to form the lower end portion of the cylindrical body into the flange portion by press forming between the lower punch and the side die, whereby the working steps can be reduced in number.

REFERENCES:
patent: 2744426 (1956-05-01), Lyon
patent: 3298218 (1967-01-01), Gollwitzer
patent: 3688373 (1972-09-01), Gregg
patent: 4185370 (1980-01-01), Evans
patent: 4408379 (1983-10-01), Kusano et al.

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