Patent US3635476A successfully refreshed from Google Patents.
US3583192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stretch-forging apparatus and method
Assignee: Friedrich Kocks GmbH and Co
•
Filing: 1969-02-17
•
Granted: 1971-06-08
•
Expires: 1989-02-17
Abstract
Abstract A swing-forging die for stretch forming ductile materials is provided having an elongated die member, a pair of connecting rods extending transversely to the pass line and each pivotally connected at one end to opposite ends of said die member and mounted for rotation on spaced eccentrics mounted on shafts lying in a plane spaced from and parallel to said pass line, said eccentrics being arranged so that the eccentric at the entry end of the die rotates between 135* to 180* ahead of the eccentric connected to the delivery end of the die and in the same direction as the direction of movement of material on the pass line and a third eccentric mounted on a shaft in a plane parallel to the pass line and connected to one end of the die by a connecting rod whereby the die oscillates back and forth in a path parallel to the pass line simultaneously with the rotation of the spaced eccentrics.
Inventors
- 👤 Friedrich Kocks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:39
CPC Classifications
B; B21; B21J; B21J7/00; B21J7/02; B21J7/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
164 words
A swing-forging apparatus for stretch forming ductile materials moving in a pass line comprising an elongated die member, a pair of connecting rods extending transversely to the pass line and each pivotally connected at one end to opposite ends of said die member and mounted for rotation on spaced eccentrics mounted on shafts lying in a plane spaced from and parallel to said pass line, said eccentrics being arranged so that the eccentric at the entry end of the die rotates between 135* to 180* ahead of the eccentric connected to the delivery end of the die and in the same direction as the direction of movement of material on the pass line and a third eccentric mounted on a shaft in a plane parallel to the pass line and connected to one end of the die by a connecting rod whereby the die oscillates back and forth in a path parallel to the pass line simultaneously with the rotation of the spaced eccentrics.
Claim 2
Dependent Claim
164 words
A swing-forging apparatus for stretch forming ductile materials moving in a pass line comprising an elongated die member, a pair of connecting rods extending transversely to the pass line and each pivotally connected at one end to opposite ends of said die member and mounted for rotation on spaced eccentrics mounted on shafts lying in a plane spaced from and parallel to said pass line, said eccentrics being arranged so that the eccentric at the entry end of the die rotates between 135* to 180* ahead of the eccentric connected to the delivery end of the die and in the same direction as the direction of movement of material on the pass line and a third eccentric mounted on a shaft in a plane parallel to the pass line and connected to one end of the die by a connecting rod whereby the die oscillates back and forth in a path parallel to the pass line simultaneously with the rotation of the spaced eccentrics.
Claim 3
Dependent Claim
32 words
A swing-forging apparatus as claimed in claim 1 wherein the spaced eccentrics are arranged so that the eccentric at the entry end rotates 150* ahead of the eccentric at the delivery end.
Claim 4
Dependent Claim
33 words
A swing-forging apparatus as claimed in claim 1 wherein two die members are mounted identically on opposite sides of a workpiece and the corresponding drive shafts are connected for uniformly driving said shafts.
Claim 5
Independent Claim
113 words
A method for stretch-forging ductile materials, comprising the steps of: a. entering a workpiece between a pair of opposed elongated dies, b. eccentrically moving the said die into and out of contact with the workpiece with the entry end of the die 135* to 180* ahead of the exit end of the die, c. simultaneously moving the die in the direction of the exit end thereof while the die is in contact with the workpiece, d. moving the die in the direction of the entry end thereof while the die is out of contact with the workpiece, and e. successively repeating the foregoing steps until the workpiece is carried through between said dies.
Claim 6
Independent Claim
113 words
A method for stretch-forging ductile materials, comprising the steps of: a. entering a workpiece between a pair of opposed elongated dies, b. eccentrically moving the said die into and out of contact with the workpiece with the entry end of the die 135* to 180* ahead of the exit end of the die, c. simultaneously moving the die in the direction of the exit end thereof while the die is in contact with the workpiece, d. moving the die in the direction of the entry end thereof while the die is out of contact with the workpiece, and e. successively repeating the foregoing steps until the workpiece is carried through between said dies.
Claim 7
Dependent Claim
23 words
The method as claimed in claim 4 wherein the entry end of the die contacts the workpiece 150* ahead of the exit end.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |