Deflagration method and apparatus for making a cam shaft

Details Deflagration method and apparatus for making a cam shaft Deflagration method and apparatus for making a cam shaft

B - Operations, Transporting

23

D

B23D 67/00 (2006.01) B21D 26/08 (2006.01) B21D 53/84 (2006.01) B21K 3/00 (2006.01) B23D 69/00 (2006.01) B23D 71/00 (2006.01) B23P 11/00 (2006.01) F16H 53/02 (2006.01)

Patent

CA 2142662

An assembly (10) and method is disclosed for making a cam shaft from a plurality of cam lobes (14) having apertures (16) disposed therethrough and a hollow tubular shaft (12). The assembly (10) comprises a support arrangement (18) for supporting the cam lobes (14) along the hollow shaft (12); a solid or liquid propellant (20) disposed within the shaft; and a deflagrator (22) for deflagrating the propellant to introduce a sudden increase of gas pressure in the hollow tubular shaft (12) to expand the shaft radially and into engagement with the cam lobes (16) thereby securing the cam lobes to the shaft and preventing movement therebetween. The propellant (20) is disposed axially along the length of the shaft (12) to promote even radial expansion of the shaft. The propellant (20) is distributed evenly along the length of a thick plastic tube (24) which is inserted in the shaft (12).

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