Method of forging rod-shaped work

Details Method of forging rod-shaped work Method of forging rod-shaped work

1998-06-19

2000-05-30

Larson, Lowell A.

Metal deforming

Process

Coiling and/or twisting

72377, B21K 144

Patent

active

060678380

ABSTRACT:
A rod-shaped work made of metal is set into a forging die having a cavity where a load is applied to the rod-shaped work in the axial direction thereof and a twist is generated therein during an upset forging process so that an expanded portion is formed. This makes it possible to prevent generation of an underfill portion in the expanded portion which cannot be removed by a drawing process.

REFERENCES:
patent: 1069659 (1913-08-01), Ferry
patent: 1427521 (1922-08-01), Clouse
patent: 3289229 (1966-12-01), Friedman
patent: 4607515 (1986-08-01), Goodfellow
patent: 4970887 (1990-11-01), Lorieux
"Press Working Guide," p. 543, edited by Japan Plastic Work Society and published by Maruzen, Co., Ltd. on Oct. 25, 1975.

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