Method for producing near net ring gear forgings
AssigneeEaton Corporation
InventorsAlvin M. Sabroff, James R. Douglas
Life of this patent
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Abstract
A method is provided for the production of near net ring gear forgings (106) including the steps of forging ring roll preforms (102) of substantially toroidal shape, ring rolling the preforms into forging blank rings (104) having a general rectangular shaped wall thickness and then precision forging said rings into near net ring gear forgings.
Claims19
A method for producing near net ring gear forgings (106) having a known outside diameter (126), toe diameter (124) and volume, said process comprising the steps of:
- (a) providing properly sized and shaped billets (100) of a known low to medium carbon level carbon or alloy steel;
- (b) heating the billets (130) to an appropriate forging temperature;
- (c) forging the heated billets (130) in a preform (138) die having a generally toroidal shaped cavity (150) into untrimmed substantially toroidal shaped ring rolling preforms (132);
- (d) without reheating, trimming the untrimmed substantially toroidal shaped ring rolling preforms into trimmed substantially toroidal shaped ring rolling preforms (102);
- (e) without reheating, ring rolling the preforms into rings (104) having substantially rectangular cross-sectional walls of a given height (108) and thickness (110) such that the inner diameter (112) of said ring is substantially equal to the toe diameter, the outer diameter (114) of said ring is less than said outside diameter and the height of said rings is in the range of one (1) to four (4) times the wall thickness thereof;
- and,
- (f) without reheating, precision forging said rings into near net ring gear forgings.
A method for producing near net ring gear forgings having a known outside diameter, toe diameter and volume, said process comprising the steps of:
- (a) providing by a process including ring rolling of heated ring rolling preforms, rings having substantially rectangular cross-sectional walls of a given height and thickness such that the inner diameter of said ring is substantially equal to the toe diameter, the outer diameter and the height of said rings is in the range of one (1) to four (4) times the wall thickness thereof;
- and
- (b) without reheating, precision forging said rings into near net ring gear forgings.
Dependencies are inferred from the claim text.