Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1991-12-23
1996-02-20
Ip, Sikyin
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148648, 148649, 148653, 192 8922, C21D 902, F16D 1300
Patent
active
054925762
ABSTRACT:
A clutch diaphragm comprises a peripheral Belleville ring portion and a central portion having a central aperture and comprising a set of radial fingers separated by slots, each of which extends from a blind end which is close to the peripheral portion to an inner end which is open into the central aperture, the latter being common to all of the slots.
In a method of making this diaphragm, a flat blank is heat treated and is then soaked and hot formed to give the diaphragm a first diaphragm angle. It is then tempered in a tempering oven. The diaphragm is then transferred from the tempering oven to a stabilizing press, in which the conicity of the diaphragm is reversed while it is still hot from the tempering oven, so that instead of the first angle it now has an inversion angle.
REFERENCES:
patent: 3213991 (1965-10-01), Smirl et al.
patent: 3668917 (1972-06-01), Komatsu et al.
patent: 3753798 (1973-08-01), Komatsu et al.
patent: 3977504 (1976-08-01), Kajitani
patent: 4132103 (1979-01-01), Le Brise
patent: 5044611 (1991-09-01), Beney et al.
Jehl Patrick
Vrinat Jean-Pierre
Ip Sikyin
Valeo
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