Method for producing a family of forged ring rolling preforms an

Details Method for producing a family of forged ring rolling preforms an Method for producing a family of forged ring rolling preforms an

1987-02-12

1989-01-17

Bray, W. Donald

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

291592, 72331, 72354, 72 68, B21J 106, B21D 2200

Patent

active

047980770

ABSTRACT:
A method (FIGS. 4 and 4a) for making ring rolling preforms (102) of substantially toroidal shape for ring rolling (84) into substantially rectangular cross-sectional wall shaped forging blank rings (104) to be precision forged (86) into near net ring gear forgings (106) for heavy-duty drive axle ring gears (14) is provided. The method, and the preform forging die (138) used therefor, allow a series of preforms having between eighty percent (80%) to one hundred percent (100%) of the volume of the toroidal cavity portion (150) of the preform die to be forged utilizing a common die.

REFERENCES:
patent: 1205301 (1916-11-01), Williams
patent: 1971027 (1934-08-01), Bell
patent: 1991486 (1935-02-01), Bell
patent: 2058007 (1936-10-01), Edelmeier
patent: 3298219 (1967-01-01), Schober
patent: 3382693 (1968-05-01), Rozhdestvensky et al.
patent: 3832763 (1974-09-01), Schober
patent: 4015461 (1977-04-01), Schober
patent: 4050283 (1977-09-01), Schober
patent: 4084419 (1978-04-01), Dittrich et al.
patent: 4590782 (1986-05-01), Leykamm et al.
SAE paper number 841085.
Metals Handbook, Thomas, 8th edition, vol. 5.
Thyssen Industrie AG Position 84/85, pp. 26-27.

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