B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/2
B21D 53/32 (2006.01) B21D 7/08 (2006.01) B21D 53/30 (2006.01)
Patent
CA 1082532
Abstract of the disclosure. A method of forming circular rims for bicycle wheels from metal profiledstrip 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 or the trailing curved end portion of the strip piece. The invention further relates to a pressing apparatus for forming the curved end portions of the strip pieces and to a three-roll ring rolling apparatus for carrying out the method.
269093
Holland Mechanics B.v.
Marks & Clerk
LandOfFree
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