Method of making camshaft

Details Method of making camshaft Method of making camshaft

1990-03-20

1990-11-13

Gorski, Joseph M.

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

29 601, 29 38E, 29447, 2988808, 74567, 419 8, B23P 1904, B21K 108, B22F 704

Patent

active

049692623

ABSTRACT:
A method of making a camshaft of the type having a cam piece composed of outer and inner layers which comprises the steps of molding a green cam piece in a manner that the outer and inner layers are respectively made from powders of outer-layer and inner-layer forming materials, fitting the green cam piece on a steel shaft to produce a green camshaft assembly, and sintering said green camshaft assembly at a temperature in which the materials shrink and yield a liquid phase to produce a camshaft having a cam piece diffusion-bonded to the outer periphery of the shaft.
The outer-layer forming material is prepared to have an axial shrinkage of 4 to 10% and shrink more than said inner-layer forming material prepared to have an axial shrinkage of 2.5 to 6%.

REFERENCES:
patent: 3962772 (1976-06-01), Haller
patent: 4137106 (1979-01-01), Doi et al.
patent: 4236923 (1980-12-01), Takahashi et al.
patent: 4524046 (1985-06-01), Suganuma et al.
patent: 4578317 (1986-03-01), Nakamura
patent: 4595556 (1986-06-01), Umeha et al.
patent: 4743425 (1988-05-01), Ohsaki et al.

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