Apparatus for forming circularly bent articles from a straight m

Details Apparatus for forming circularly bent articles from a straight m Apparatus for forming circularly bent articles from a straight m

1977-08-04

1979-08-14

Mehr, Milton S.

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

72 15, 72175, B21D 514

Patent

active

041641337

ABSTRACT:
Apparatus for forming circular rims for bicycle wheels from metal profiled strip material in which first strip pieces are cut to a length corresponding to the circumferential length of the rims, curved end portions are formed on each strip piece, and each strip piece is introduced into a three-roll ring rolling apparatus. After the strip piece has been worked up to the trailing curved end portion thereof, the adjustable middle roll of the rolling apparatus is shifted a small distance towards the two outer rolls into a position corresponding with a substantially bending-free passage of the trailing curved end portion of the strip piece.

REFERENCES:
patent: 2742078 (1956-04-01), Williams
patent: 2995171 (1961-08-01), Hausler
patent: 3048202 (1962-08-01), Hillix

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