US3760957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveying device for a drop forging press
Assignee: Eumuco AG fuer Maschinenbau
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Filing: 1971-12-10
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Granted: 1973-09-25
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Expires: 1991-12-10
Abstract
Abstract A workpiece conveying device is provided for a drop forge type press which includes parallel conveying means which extend transverse through the frame of the press and are adapted to move in unison to grip and transfer a workpiece to and from the dies of the forging press. A drive control mechanism is provided on each side of the press frame and located above the lower die of the press. The conveying beams are suspended from the control mechanism by the use of spring-biased piston-cylinder units which move the conveying beams in response to the control mechanism. A motor drive assembly is provided for driving the control mechanism and in turn the conveying beams. Two detent gear mechanisms composed of pivoting linkage mechanisms move in separate planes which are arranged perpendicular to each other. The detent gears are designed and are interconnected to effect a predetermined, three-dimensional, closed path motion to the conveying beams. The spring-biased piston-cylinder suspension members are constantly pressurized into the extended position for normal operations. Release of this pressure retracts the conveying beams to provide clearance for removal of the bottom forging die. A safety release connection between the piston and rod of the suspension members permits the conveying beams to be separated to prevent damage to the control mechanism if the beams are inadvertently caught in the forging press ram operation. In another embodiment, the control mechanism is composed of a pair of movable slide plates which are located on opposite sides of the press frames and which are adapted to be moved in unison in two dimensions by the use of fluid motors. The slide plate movement is transferred to the conveying beams and movement of the beams in a gripping or third dimension is provided by a fluid motor-operated toggle mechanism.
Inventors
- 👤 R Berger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:09
CPC Classifications
B; B21; B21J; B21J13/00; B21J13/08; B21D; B21D43/00; B21D43/02; B21D43/04; B21D43/05; B21D43/055
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
207 words
A workpiece transferring apparatus for a drop forging press which includes a frame structure, a power driven ram and top and bottom forging dies which are moved in reciprocating motion with respect to each other by the power driven ram to shape a workpiece placed therebetween, said transferring apparatus comprising: a. conveying means adapted to straddle the forging dies for moving workpieces, b. said conveying means including a pair of conveying beams having a gripping means near their central portion for cooperatively gripping opposite sides of a workpiece, c. drive control means, and d. suspension means arranged to support and suspend said conveying means from the drive control means, e. said suspension means including a plurality of support members which are pivotally attached to the ends of said conveying beams, f. each said support member comprising a piston-cylinder means adapted for positioning said conveying beams in an extended and a retracted position with respect to said forging dies, g. each said piston cylinder means including a biasing means to bias the piston cylinder means towards the retracted position, h. said control means being adapted to move said suspension means and conveying means in unisonous, predetermined movement whereby the workpiece is moved to and from the forging dies.
Claim 2
Dependent Claim
207 words
A workpiece transferring apparatus for a drop forging press which includes a frame structure, a power driven ram and top and bottom forging dies which are moved in reciprocating motion with respect to each other by the power driven ram to shape a workpiece placed therebetween, said transferring apparatus comprising: a. conveying means adapted to straddle the forging dies for moving workpieces, b. said conveying means including a pair of conveying beams having a gripping means near their central portion for cooperatively gripping opposite sides of a workpiece, c. drive control means, and d. suspension means arranged to support and suspend said conveying means from the drive control means, e. said suspension means including a plurality of support members which are pivotally attached to the ends of said conveying beams, f. each said support member comprising a piston-cylinder means adapted for positioning said conveying beams in an extended and a retracted position with respect to said forging dies, g. each said piston cylinder means including a biasing means to bias the piston cylinder means towards the retracted position, h. said control means being adapted to move said suspension means and conveying means in unisonous, predetermined movement whereby the workpiece is moved to and from the forging dies.
Claim 3
Dependent Claim
31 words
A transferring apparatus as defined in claim 1 wherein said piston-cylinder means is normally held in the extended position against said biasing meanS by the continuous application of fluid pressure thereto.
Claim 4
Dependent Claim
46 words
A transferring apparatus as defined in claim 1 wherein each of said piston-cylinder means includes a piston and piston rod which are interconnected by a releasable means so that said piston and piston rod will separate if an excessive force is applied to said conveying means.
Claim 5
Dependent Claim
198 words
A workpiece transferring apparatus for a hot forging drop press which includes a frame structure, a main drive for a power driven ram and top and bottom forging dies which are moved in reciprocating motion with respect to each other by the power driven ram to shape a workpiece placed threrbetwee, said transferring apparatus comprising: a. conveying means adapted to straddle the forging dies for moving workpieces, b. a separate drive control means independent from the main drive of the hot forging press, c. said independent drive control means being located above the bottom forging die, d. said conveying means including a pair of transfer beams for receiving the workpiece between them, and e. suspension means including support members each pivotally attached at one end thereof to an end of a transfer beam and attached at the other end thereof in a Cardan like manner to cross beams that are pivotally mounted around shafts located on each side of the press, f. said drive control means includes gear means for effecting longitudinal and transverse movement of the transfer beams via the suspension means in unisonous, predetermined movement whereby the workpiece is moved to and from the forging dies.
Claim 6
Dependent Claim
198 words
A workpiece transferring apparatus for a hot forging drop press which includes a frame structure, a main drive for a power driven ram and top and bottom forging dies which are moved in reciprocating motion with respect to each other by the power driven ram to shape a workpiece placed threrbetwee, said transferring apparatus comprising: a. conveying means adapted to straddle the forging dies for moving workpieces, b. a separate drive control means independent from the main drive of the hot forging press, c. said independent drive control means being located above the bottom forging die, d. said conveying means including a pair of transfer beams for receiving the workpiece between them, and e. suspension means including support members each pivotally attached at one end thereof to an end of a transfer beam and attached at the other end thereof in a Cardan like manner to cross beams that are pivotally mounted around shafts located on each side of the press, f. said drive control means includes gear means for effecting longitudinal and transverse movement of the transfer beams via the suspension means in unisonous, predetermined movement whereby the workpiece is moved to and from the forging dies.
Claim 7
Dependent Claim
35 words
A transferring apparatus as defined in claim 4 wherein said support members comprise a piston-cylinder means adapted for positioning said transfer beams in an extended and a retracted position with respect to said forging dies.
Claim 8
Dependent Claim
52 words
A transferring apparatus as defined in claim 5 wherein said piston-cylinder means includes a biasing means to bias a piston member toward the retracted position while the free side of the piston member is under a constant pneumatic pressure whereby the piston force is dimensioned to be superior to the spring force.
Claim 9
Dependent Claim
20 words
A device as defined in claim 4 wherein the swing movements of the transfer beams are limited by draw cables.
Claim 10
Dependent Claim
59 words
A transferring apparatus as defined in claim 4 wherein said gear means includes a main gear means located on one side of the press frame and an auxiliary gear means located on a side of the press frame opposite said main gear means, said main gear means and said auxiliary gear means being interconnected by a drive shaft means.
Claim 11
Dependent Claim
30 words
A transferring apparatus as defined in claim 8 wherein said main gear means includes at least one detent gear means for moving said conveying means in a predetermined cyclic path.
Claim 12
Dependent Claim
32 words
A transferring apparatus as defined in claim 4 wherein said gear means includes a pair of detent gear means which is arranged to move said transfer beams in three mutually perpendicular planes.
Claim 13
Dependent Claim
42 words
A transferring apparatus as defined in claim 5 wherein said gear means includes at least two detent gear means which coact with each other to impart a predetermined cyclic movement to said transfer beams in order to grip and convey the workpiece.
Claim 14
Dependent Claim
41 words
A transferring apparatus as defined in claim 11 wherein one of said detent gear means controls the longitudinal movement of said transfer beams and the other of said detent gear means controls the lifting and gripping movements of said transfer beams.
Claim 15
Dependent Claim
39 words
A transferring apparatus as defined in claim 11 wherein each said detent gear means includes a crank means, rocker arm means and link means arranged in a workable mechanism to impart a predetermined mechanical movement to said transfer beams.
Claim 16
Dependent Claim
26 words
A transferring apparatus as defined in claim 8 wherein said main gear means includes detent gears adapted for opening, closing, lifting and lowering the transfer beams.
Claim 17
Dependent Claim
29 words
A transferring appAratus as defined in claim 4 wherein said gear means includes a detent gear having a link means and a toggle-lever system mounted on a cross beam.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |