Metal deforming – With cleaning – descaling – or lubrication of work or product – Lubricating
Patent
1977-04-01
1977-11-01
Combs, E. M.
Metal deforming
With cleaning, descaling, or lubrication of work or product
Lubricating
29DIG45, 72 46, 72352, 72364, 72700, B21J 300
Patent
active
040559750
ABSTRACT:
A process of precision forging of titanium or a titanium alloy in which the forging stock and a segmented die are first heated to forging temperature while separated, and are then assembled together and heated again to that temperature, with the stock being covered by a protective coating preferably containing glass grit, and the die sections being coated with lubricant. The heated die and contained heated forging stock are then inserted in a heated holder and the stock subjected to forging force, to partially but not completely deform the stock to the shape of the die cavity, following which the die and stock are separated and the stock allowed to cool, flashing is removed from the stock, the die is cleaned, the die and stock are recoated and then reheated separately and then together, and the stock is forged again to assume more closely the shape of the die cavity. The series of recoating, heating and forging steps are performed at least twice, and may be repeated one or more additional times as necessary to completely forge the part to the die cavity shape.
REFERENCES:
patent: 3060564 (1962-10-01), Corral
patent: 3313138 (1967-04-01), Spring et al.
patent: 3519503 (1970-07-01), Moore et al.
patent: 3635068 (1972-01-01), Watmough et al.
patent: 3691804 (1972-09-01), Clendenin et al.
patent: 3867208 (1975-02-01), Grekov et al.
patent: 3969155 (1976-07-01), McKeighen
Isothermal Hot Die Forging of Complex Parts in a Titanium Alloy, Kulkarni et al., Journal of the Institute of Metals, vol. 100, pp. 146-151 (1972).
Serfozo Tibor
Simenz Rod F.
Combs E. M.
Lockheed Aircraft Corporation
Turner Lowell G.
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