Method of making a camshaft

Details Method of making a camshaft Method of making a camshaft

B - Operations, Transporting

21

B

B21B 19/14 (2006.01) B21C 1/24 (2006.01) B21C 37/16 (2006.01) B21D 53/84 (2006.01) B21H 1/18 (2006.01) B21K 1/12 (2006.01) F01L 1/02 (2006.01) F01L 1/047 (2006.01)

Patent

CA 2138231

A method of forming a camshaft tube having a plurality of thinner wall sections adjacent to thicker wall sections. The diameter of a hollow tube is mechanically reduced with a retractable mandrel inserted in the hollow tube. The retractable mandrel has a first portion having a larger diameter than an adjacent second portion. To form a thinner wall section, the larger diameter first portion is positioned under a reducing tool. To form a thicker portion, the smaller diameter second portion is positioned under a reducing tool.

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