Tool for supporting a composite camshaft during sintering

Details Tool for supporting a composite camshaft during sintering Tool for supporting a composite camshaft during sintering

1986-06-13

1987-08-18

Andrews, Melvyn J.

Metallurgical apparatus

Means for holding or supporting work

266287, 432253, 248 49, 248 681, F27D 500, F27D 1500

Patent

active

046871853

ABSTRACT:
A tool for supporting a composite camshaft having a steel shaft and a sintered piece to be joined to the steel shaft through sintering in a sintering furnace. The tool comprises a graphite frame having at least two sides, in an upper portion of which a groove means is formed. A ceramic layer is provided on a surface of the groove means. When sintering is performed using such a tool, the tool will not deform even if the tool is exposed to an environment of high temperature, such as the temperature higher than 1,100.degree. C., and therefore, bending of the composite camshaft will not occur during sintering. In addition, the ceramic layer prevents diffusion of carbon from the graphite frame to the steel shaft of the composite camshaft, and therefore, a hardening of the steel shaft due to carbonizing will not occur. As a result, reliability of the joint between the sintered piece and the steel shaft is increased.

REFERENCES:
patent: 3988107 (1976-10-01), Koch

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