Patent US3965718A successfully refreshed from Google Patents.
US3965718A
Expired / Lapsed
US
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Transfer mechanism
Assignee: National Machinery Co
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Filing: 1974-11-18
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Granted: 1976-06-29
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Expires: 1994-11-18
Abstract
Abstract A transfer for a forging machine is disclosed which is operable to progressively transfer workpieces laterally between spaced die stations on a die breast of the machine. The transfer mechanism includes first and second assemblies, each including transfer arms which are positioned on either side of the die stations closely adjacent to the plane of the die breast. The transfer arms are mounted for arcuate movement about parallel axes to provide opening and closing. Lengthwise movement of the arms is provided for the transfer of a gripped part and for return of the grippers. Each transfer arm carries workpiece grippers having finger end portions operable to grip workpieces at each die station as the transfer arms are translated toward each other. Guides are provided to cause the finger end portions of the workpiece grippers to follow paths substantially parallel to the plane of the die breast. In one illustrated embodiment the assemblies are pivoted on axes which are parallel to the face of the die breast and in another illustrated embodiment the assemblies are pivoted on axes perpendicular to the face of the die breast.
Inventors
- 👤 Gaylen O. Kline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:18
CPC Classifications
B; B21; B21K; B21K27/00; B21K27/02; B21K27/04; B21J; B21J13/00; B21J13/08; B21J13/10; B21K1/00; B21K1/64
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
194 words
A transfer for forging machines or the like comprising a frame, a pair of opposed assemblies with each assembly including a support member pivoted on said frame for arcuate movement about a pivot axes parallel to the pivot axes of the other support member, an elongated arm mounted on each support member for lengthwise movement relative to its associated support member, each elongated arm having a cantilever end section, workpiece grippers mounted on the end sections operable to grip a workpiece at one transfer location and to transport such workpiece to another transfer location, and drive means operable to pivot said assemblies about their respective pivot axes to open and close said grippers and to produce lengthwise movement of said arms to move said grippers between said transfer locations, the direction of said lengthwise movement of said arms being parallel when said grippers are closed on a workpiece, the mounting of each elongated arm on its associated support being at a support location to one side of said transfer locations in the direction of the length of said elongated arms, and said cantilever end sections extending from said support location to said transfer locations.
Claim 2
Dependent Claim
194 words
A transfer for forging machines or the like comprising a frame, a pair of opposed assemblies with each assembly including a support member pivoted on said frame for arcuate movement about a pivot axes parallel to the pivot axes of the other support member, an elongated arm mounted on each support member for lengthwise movement relative to its associated support member, each elongated arm having a cantilever end section, workpiece grippers mounted on the end sections operable to grip a workpiece at one transfer location and to transport such workpiece to another transfer location, and drive means operable to pivot said assemblies about their respective pivot axes to open and close said grippers and to produce lengthwise movement of said arms to move said grippers between said transfer locations, the direction of said lengthwise movement of said arms being parallel when said grippers are closed on a workpiece, the mounting of each elongated arm on its associated support being at a support location to one side of said transfer locations in the direction of the length of said elongated arms, and said cantilever end sections extending from said support location to said transfer locations.
Claim 3
Dependent Claim
50 words
A transfer as set forth in claim 1 wherein said pivot axes are located at a point substantially spaced from both of said transfer locations, and a housing is provided to isolate substantially all of said transfer mechanism except for said grippers and said end sections from said transfer locations.
Claim 4
Dependent Claim
51 words
A transfer as set forth in claim 1 wherein said two transfer locations are horizontally spaced, and said pivot of said support members are horizontal and substantially spaced from said transfer locations, said arms extending generally horizontal and being supported at a position horizontally spaced to one side of said locations.
Claim 5
Dependent Claim
32 words
A transfer as set forth in claim 1 wherein said elongated arms are circular in cross section, and guide means are provided to prevent rotation of said arms about their longitudinal axes.
Claim 6
Dependent Claim
35 words
A transfer as set forth in claim 4 wherein said pivot axes of said support members are substantially perpendicular to said direction of lengthwise movement and are spaced to one side of said transfer locations.
Claim 7
Dependent Claim
39 words
A transfer as set forth in claim 5 wherein said drive means include a lever pivoted between said members, rotation of said lever about its pivot axes causing said support members to pivot toward and away from each other.
Claim 8
Dependent Claim
39 words
A transfer as set forth in claim 1 wherein spring means resiliently bias said support members for gripping a workpiece by said gripper means, and said drive means is connected to overcome said spring means to release said grippers.
Claim 9
Dependent Claim
50 words
A transfer as set forth in claim 1 wherein said longitudinal arms are circular in cross section, and guide means are connected to said arms to maintain the movement of the workpiece gripping portions of said workpiece grippers substantially along a plane as said grippers grip and release a workpiece.
Claim 10
Dependent Claim
25 words
A transfer as set forth in claim 8 wherein said pivot axes of said support members are substantially parallel to said direction of lengthwise movement.
Claim 11
Dependent Claim
25 words
A transfer as set forth in claim 8 wherein said pivot axes of said support members are substantially perpendicular to said direction of lengthwise movement.
Claim 12
Dependent Claim
196 words
A workpiece forging machine or the like having a die bed providing a plurality of die stations spaced therealong in a direction of transfer, a transfer mechanism operable to progressively transfer workpieces in said direction of transfer between said die stations, said transfer mechanism including a pair of opposed assemblies each pivoted at locations spaced from said die stations for arcuate movement about axes which are parallel to each other, each assembly including an elongated arm supported laterally to one side of said dies for lengthwise movement and providing a cantilever end section extending to a location adjacent to said die stations, cooperating workpiece grippers mounted on said end sections of each arm, a first drive operable to pivot said assemblies about their respective pivots in opposite directions to move said grippers toward and away from each other for gripping and releasing a workpiece, a second drive operable to simultaneously move said arms in the direction of their length to cause said grippers to move back and forth between adjacent die stations, said lengthwise movement of each arm being parallel to said transferred direction when said grippers grip and transfer a workpiece between said die stations.
Claim 13
Dependent Claim
196 words
A workpiece forging machine or the like having a die bed providing a plurality of die stations spaced therealong in a direction of transfer, a transfer mechanism operable to progressively transfer workpieces in said direction of transfer between said die stations, said transfer mechanism including a pair of opposed assemblies each pivoted at locations spaced from said die stations for arcuate movement about axes which are parallel to each other, each assembly including an elongated arm supported laterally to one side of said dies for lengthwise movement and providing a cantilever end section extending to a location adjacent to said die stations, cooperating workpiece grippers mounted on said end sections of each arm, a first drive operable to pivot said assemblies about their respective pivots in opposite directions to move said grippers toward and away from each other for gripping and releasing a workpiece, a second drive operable to simultaneously move said arms in the direction of their length to cause said grippers to move back and forth between adjacent die stations, said lengthwise movement of each arm being parallel to said transferred direction when said grippers grip and transfer a workpiece between said die stations.
Claim 14
Dependent Claim
39 words
A workpiece forging machine as set forth in claim 11 wherein a housing is provided to isolate substantially all of said transfer mechanism excepting for said grippers and said end sections from said die stations to prevent contamination thereof.
Claim 15
Dependent Claim
35 words
A workpiece forging machine as set forth in claim 11 wherein said pivot axes of said assemblies are substantially parallel to said direction of transfer and are located on opposite sides of said die stations.
Claim 16
Dependent Claim
40 words
A workpiece forging machine as set forth in claim 11 wherein said pivot axes of said assemblies are substantially perpendicular to said direction of transfer and are located to one side of said die stations in said direction of transfer.
Claim 17
Dependent Claim
142 words
In a clockwise forging machine having a die breast provided with a plurality of laterally spaced die stations, a transfer assembly operable to progressively transfer workpieces laterally between said die stations, said transfer assembly including first and second transfer arms, means mounting said transfer arms for arcuate translation about parallel axes spaced from said die stations, means to drive said transfer arms through said arcuate translation toward and away from each other, workpiece gripping means supported and carried by each transfer arm and having finger end portions operable to grip workpieces at each die station as said transfer arms are translated toward each other, means for guiding each of said finger end portions substantially parallel to the plane of said die breast during the arcuate translation of said transfer arms, and means for translating said gripping means laterally between adjacent die stations.
Claim 18
Dependent Claim
142 words
In a clockwise forging machine having a die breast provided with a plurality of laterally spaced die stations, a transfer assembly operable to progressively transfer workpieces laterally between said die stations, said transfer assembly including first and second transfer arms, means mounting said transfer arms for arcuate translation about parallel axes spaced from said die stations, means to drive said transfer arms through said arcuate translation toward and away from each other, workpiece gripping means supported and carried by each transfer arm and having finger end portions operable to grip workpieces at each die station as said transfer arms are translated toward each other, means for guiding each of said finger end portions substantially parallel to the plane of said die breast during the arcuate translation of said transfer arms, and means for translating said gripping means laterally between adjacent die stations.
Claim 19
Dependent Claim
39 words
A workpiece forging machine according to claim 15 wherein said axes are defined by parallel shafts and wherein said means mounting said transfer arms for arcuate translation comprise links journaled to the transfer arms and carried by said shafts.
Claim 20
Dependent Claim
50 words
A workpiece forging machine according to claim 16 wherein a link connects each arm to each shaft and wherein each of said links comprises a bell crank arm pivotally connected to the other bell crank arm to cause arcuate translation of said transfer arms toward and away from each other.
Claim 21
Dependent Claim
32 words
A workpiece forging machine according to claim 17 wherein said means to drive said transfer arms through said arcuate translation comprises a rod pivotally connected to one of said bell crank arms.
Claim 22
Dependent Claim
17 words
A workpiece forging machine according to claim 18 wherein said transfer arms are biased toward each other.
Claim 23
Dependent Claim
73 words
A workpiece forging machine according to claim 15 wherein said means for guiding said finger end portions comprises first and second arms respectively fixed to said first and second transfer arms and projecting toward each other, the projecting ends of said arms being received by guide means operable to guide the projecting ends of said arms in planes parallel to the plane of said die breast upon arcuate translation of said transfer arms.
Claim 24
Dependent Claim
39 words
A workpiece forging machine according to claim 20 wherein the ends of said projecting arms are provided with blocks pivoted thereto and wherein said blocks are slidable between plates having faces parallel to the plane of said die breast.
Claim 25
Dependent Claim
22 words
A workpiece forging machine according to claim 21 wherein said blocks are positioned closely adjacent to the plane of said die breast.
Claim 26
Dependent Claim
82 words
A workpiece forging machine according to claim 15 wherein said means for translating said gripping means laterally between adjacent die stations comprises first and second rods respectively pivotally connected at one end to said first and second transfer arm means and pivotally connected at their other ends to first and second crank arms, said crank arms being mounted at the ends of a cross shaft and said cross shaft carrying a spur gear thereon which is engaged by a driving gear rack.
Claim 27
Dependent Claim
30 words
A workpiece forging machine according to claim 23 wherein the pivotal connection between said first and second rods and said first and second transfer arms means comprises self-aligning bearing means.
Claim 28
Dependent Claim
17 words
A workpiece forging machine according to claim 15 wherein said transfer arms are surrounded by housing means.
Claim 29
Dependent Claim
23 words
A workpiece forging machine according to claim 15 wherein the finger end portions on said first transfer arm are biased toward each other.
Claim 30
Dependent Claim
32 words
A workpiece forging machine according to claim 26 wherein means are provided to move said first transfer arm away from said second transfer arm prior to movement of said second transfer arm.
Claim 31
Dependent Claim
201 words
In a workpiece forging machine having a die breast provided with a plurality of laterally spaced die stations, a transfer assembly operable to progressively transfer workpieces laterally between said die stations, said transfer assembly including first and second transfer arms positioned closely adjacent to the plane of the die breast, means mounting said transfer arms for arcuate translation about parallel axes spaced from said die stations, means to drive said transfer arms through said arcuate translation toward and away from each other, workpiece gripping means carried by each transfer arm and having finger end portions operable to grip workpieces at each die station as said transfer arms are translated toward each other, means for guiding said finger end portions substantially parallel to the plane of said die breast during the arcuate translation of said transfer arms, said means for guiding said finger end portions comprising first and second projections respectively fixed to said first and second transfer arms being received by guide means operable to guide the projecting ends of said arms in planes parallel to the plane of said die breast upon arcuate translation of said transfer projections, and means for translating said gripping means laterally between adjacent die stations.
Claim 32
Dependent Claim
201 words
In a workpiece forging machine having a die breast provided with a plurality of laterally spaced die stations, a transfer assembly operable to progressively transfer workpieces laterally between said die stations, said transfer assembly including first and second transfer arms positioned closely adjacent to the plane of the die breast, means mounting said transfer arms for arcuate translation about parallel axes spaced from said die stations, means to drive said transfer arms through said arcuate translation toward and away from each other, workpiece gripping means carried by each transfer arm and having finger end portions operable to grip workpieces at each die station as said transfer arms are translated toward each other, means for guiding said finger end portions substantially parallel to the plane of said die breast during the arcuate translation of said transfer arms, said means for guiding said finger end portions comprising first and second projections respectively fixed to said first and second transfer arms being received by guide means operable to guide the projecting ends of said arms in planes parallel to the plane of said die breast upon arcuate translation of said transfer projections, and means for translating said gripping means laterally between adjacent die stations.
Claim 33
Dependent Claim
39 words
A workpiece forging machine according to claim 28 wherein said axes are defined by parallel shafts and wherein said means mounting said transfer arms for arcuate translation comprise links journaled to the transfer arms and carried by said shafts.
Claim 34
Dependent Claim
50 words
A workpiece forging machine according to claim 29 wherein a link connects each arm to each shaft and wherein each of said links comprises a bell crank arm pivotally connected to the other bell crank arm to cause arcuate translation of said transfer arms toward and away from each other.
Claim 35
Dependent Claim
36 words
A workpiece forging machine according to claim 28 wherein a workpiece gripping means is hinged to its transfer arm so that it may be swung away from said die breast for access to said die stations.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |