To provide high dimensional accuracy, while dispensing with the final finishing processing (machining), by continuously performing a plurality of cold forging processes.
The final product of a cam for a camshaft having high dimensional accuracy, is provided while dispensing with the final finishing processing (machining) of a cam (profile) surface, by continuously applying the plurality of cold forging processes composed of contour preliminary upsetting, contour drawing, simultaneous punching of an inner diameter surface and an outer diameter surface, pressure molding for forming a surplus part on the inner diameter surface as a burr, inner diameter surface punching for punching the burr of the inner diameter surface, and simultaneous ironing of the inner diameter surface and the outer diameter surface, to a billet having the volume larger by a predetermined quantity than the final product.
SATAKE KOJI
KURASAWA HIDEO
ONO KOZO
ONO SEIKO KK
Toshiyuki Miyadera
Tatsuhiko Sato
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