Deflagration method for making a camshaft

Details Deflagration method for making a camshaft Deflagration method for making a camshaft

1995-01-12

1996-11-05

Watson, Robert C.

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

29523, 292835, 29252, 29254, 74567, B21D 3900

Patent

active

055705073

ABSTRACT:
A 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).

REFERENCES:
patent: 4494392 (1985-01-01), Schroeder
patent: 4685205 (1987-08-01), Schroeder et al.
patent: 4750250 (1988-06-01), Maus et al.
patent: 5085099 (1992-02-01), Hughes
patent: 5220727 (1993-06-01), Hochstein
patent: 5280672 (1994-01-01), Hochstein

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