B - Operations – Transporting – 21 – J
Patent
B - Operations, Transporting
21
J
26/189, 78/29
B21J 13/02 (2006.01) B21K 1/76 (2006.01)
Patent
CA 1307389
Abstract A method and apparatus for manufacturing a product such as a constant velocity joint whose opening is narrower than the interior, by ironing a workpiece supplied to working parts of punches which workpiece is pre-formed into a hollow structure whose opening has an excess metal needed to be ironed. A group of circumferentially divided punches are mounted around a punch guide for relative axial movement. The group of punches comprises first and second punches disposed alternately. Each punch has a working part in the end thereof and the working parts are closely assembled at the time of forming process. Further, each punch is formed with an escape groove in the side slidable with the punch guide. The escape grooves in the first punches are different in length from those in the second punches. After the workpiece is supplied to the working parts of the punches and ironed to narrow the outside diameter, the punches are moved relative to the punch guide to narrow firstly the first punches and secondly the second punches and pull out the formed workpiece from the punches.
577031
Ishinaga Nobuyuki
Nakano Takashi
Sugimoto Kiyoshi
Aida Engineering Ltd.
Ishinaga Nobuyuki
Nakano Takashi
Sugimoto Kiyoshi
Swabey Ogilvy Renault
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