Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1998-07-02
2000-04-25
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
72358, B21K 2112
Patent
active
060530235
ABSTRACT:
A method and apparatus for cold forging a workpiece having a non-circular opening. The workpiece may be, for example, a ball joint housing having a non-circular opening in the bottom. The housing made be made of metal, such as carbon, alloy and stainless steels, aluminum, titanium, brass, copper, and high-temperature alloys that contain cobalt, nickel or molybdenum. The non-circular opening is preferably oblong in shape for providing uni-axial movement of a toggle or shaft. The workpiece is preferably cold forged using the backward extrusion process in which the metal flows back and around the descending punch or ram. The punch and stool are designed such that they are slightly more elongated in the transverse direction than the non-circular opening in order to compensate for the tendency for the finished workpiece to be elongated in the longitudinal direction due to the cold forging process. The punch and stool are also designed with an opening to allow space for any excess metal to flow in order to relieve the pressure during formation of the workpiece.
REFERENCES:
patent: 2527787 (1950-10-01), Berger
patent: 3063744 (1962-11-01), Flumerfelt
patent: 3197842 (1965-08-01), Parker
patent: 3253330 (1966-05-01), Davies
patent: 3411815 (1968-11-01), Sullivan, Jr.
patent: 3530495 (1970-09-01), Kindel
patent: 3560035 (1971-02-01), Kindel
patent: 3571882 (1971-03-01), Andrew
patent: 3574369 (1971-04-01), Andrew
patent: 3574370 (1971-04-01), Andrew
patent: 3638976 (1972-02-01), Andrew
patent: 3647249 (1972-03-01), Baba et al.
patent: 3677587 (1972-07-01), Schmidt et al.
patent: 3787127 (1974-01-01), Cutler
patent: 3969030 (1976-07-01), Sullivan
patent: 3999870 (1976-12-01), Clark et al.
patent: 4003667 (1977-01-01), Gaines et al.
patent: 4038860 (1977-08-01), Kanamaru et al.
patent: 4134701 (1979-01-01), McEowen
patent: 4143983 (1979-03-01), McEowen
patent: 4144626 (1979-03-01), McEowen
patent: 4148119 (1979-04-01), McEowen
patent: 4381594 (1983-05-01), Levande et al.
patent: 4430016 (1984-02-01), Matsuoka et al.
patent: 4463590 (1984-08-01), Theobald
patent: 4527924 (1985-07-01), Asberg
patent: 4543812 (1985-10-01), Theobald
patent: 4577989 (1986-03-01), Ito
patent: 4790682 (1988-12-01), Henkel
patent: 5011320 (1991-04-01), Love et al.
patent: 5290203 (1994-03-01), Krude
Flowform, Inc.
Larson Lowell A.
LandOfFree
Method of cold forging a workpiece having a non-circular opening does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of cold forging a workpiece having a non-circular opening, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of cold forging a workpiece having a non-circular opening will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-984293