Electromagnetically driven punch press with magnetically isolated removable electromagnetic thrust motor
First Claim
1. In an electromagnetically driven punch press including a base for mounting base tooling and having a plurality of guide pins upstanding from the base in spaced relationship among said guide pins, and a motion member above the base for mounting upper tooling above the base tooling, said motion member being carried by bushings mounted to the motion member, respective bushings being movable downwardly along respective guide pins during a downward stroke of said motion member and being movable upwardly along the respective guide pins during an upward return stroke of said motion member, the invention comprising:
- said guide pins extending up through said bushings to upper ends of the guide pins at an elevation at least about two inches (at least about 50 mm) above said motion member when said motion member is at an initial position prior to its downward stroke,a top mounting member attached to said upper ends of said guide pins,said top mounting member being ferromagnetic,said ferromagnetic top mounting member being at an elevation at least about two inches (at least about 50 mm) above said motion member when said motion member is at said initial position,a solenoid winding mounted above said top mounting member and having a vertical opening surrounded by said winding,a vertically movable ferromagnetic armature aligned with said winding opening and being movable downwardly and upwardly in said winding opening,a ferromagnetic enclosure for said winding,said ferromagnetic enclosure being over a top of the solenoid winding and being mounted to said mounting member,said ferromagnetic enclosure having an opening positioned near the top of said winding aligned with said winding opening,said armature extending up through said opening in said ferromagnetic enclosure,said top mounting member having an opening positioned near the bottom of said winding aligned with said winding opening,a pair of non-magnetic push rods connected to said armature and extending down through said opening in said top mounting member and being connected to said motion member for driving said motion member downwardly upon electrical energization of said solenoid winding, andreturn means mounted on said top mounting member and being connected to said motion member for moving said motion member in said upward return stroke.
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Accused Products
Abstract
An electromagnetically-driven punch press has an electromagnetic drive thrust motor comprising a fan-cooled solenoid winding and movable armature mounted in elevated location for isolating the magnetic circuit from the tooling to avoid tool magnetization and isolating winding heat from tooling for stabilizing tool dimensions. Stroke length, "open" height and "shut" height are conveniently adjustable; and tool performance is optimized by adjusting armature-thrust versus travel. Four-way access to tooling enables convenient material feeding and handling, including multi-direction or multi-layer feed. Scrap pieces are freely downwardly ejected. Multiple electromagnetic drives are mountable side-by-side at the same elevation, or they are stackable at multiple levels for increased power or for tailoring force-versus-distance relative to materials being worked. Materials-handling and/or tool-handling robots or pneumatic actuators can be installed on an elevated platform. The electromagnetic drive is removable and interchangeable among multiple die sets for easy tooling change-over among various production runs. Thus, "tooling set-up" by skilled machinist need be performed only once for each die set until worn dies require sharpening. A resilient upwardly biased shuttle pole-piece boosts available energy by extending upwardly into the winding opening. Ball-bearing bushings carry the movable tool and anti-skid supports prevent ball bearings and their cages from skidding downwardly when the moving tool impacts against the work material. Adjustable resilient cushioning arrests tool travel for minimizing "tool whip" and tool wear at the end of the work stroke.
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Citations
53 Claims
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1. In an electromagnetically driven punch press including a base for mounting base tooling and having a plurality of guide pins upstanding from the base in spaced relationship among said guide pins, and a motion member above the base for mounting upper tooling above the base tooling, said motion member being carried by bushings mounted to the motion member, respective bushings being movable downwardly along respective guide pins during a downward stroke of said motion member and being movable upwardly along the respective guide pins during an upward return stroke of said motion member, the invention comprising:
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said guide pins extending up through said bushings to upper ends of the guide pins at an elevation at least about two inches (at least about 50 mm) above said motion member when said motion member is at an initial position prior to its downward stroke, a top mounting member attached to said upper ends of said guide pins, said top mounting member being ferromagnetic, said ferromagnetic top mounting member being at an elevation at least about two inches (at least about 50 mm) above said motion member when said motion member is at said initial position, a solenoid winding mounted above said top mounting member and having a vertical opening surrounded by said winding, a vertically movable ferromagnetic armature aligned with said winding opening and being movable downwardly and upwardly in said winding opening, a ferromagnetic enclosure for said winding, said ferromagnetic enclosure being over a top of the solenoid winding and being mounted to said mounting member, said ferromagnetic enclosure having an opening positioned near the top of said winding aligned with said winding opening, said armature extending up through said opening in said ferromagnetic enclosure, said top mounting member having an opening positioned near the bottom of said winding aligned with said winding opening, a pair of non-magnetic push rods connected to said armature and extending down through said opening in said top mounting member and being connected to said motion member for driving said motion member downwardly upon electrical energization of said solenoid winding, and return means mounted on said top mounting member and being connected to said motion member for moving said motion member in said upward return stroke. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An electromagnetic thrust motor for use in operating a die set in a punch press and wherein said die set includes a base for mounting base tooling with a plurality of guide pins upstanding from said base and a motion member for mounting upper tooling above said base tooling, said motion member being movable downwardly and upwardly along said guide pins, said electromagnetic thrust motor comprising:
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a top mounting member adapted to be attached to upper portions of said guide pins above said motion member for positioning said top mounting member above said motion member, at least one solenoid winding mounted onto said top mounting member above said top mounting member, said solenoid winding having a winding opening extending vertically through said winding, said top mounting member having an opening extending vertically therethrough below said winding opening and being aligned with said winding opening, ferromagnetic enclosure means at least partially enclosing said solenoid winding and defining a passageway extending vertically therethrough above said winding opening and being aligned with said winding opening, a ferromagnetic armature movable downwardly and upwardly in said winding opening, said ferromagnetic armature extending upwardly through said passageway in said enclosure means, a pair of non-magnetic push rods connected to said armature and extending down through said opening in said top mounting member and being connectable to said motion member for thrusting said motion member downward from an initial position upon electrical energization of said solenoid winding, and return means mounted on said top mounting member and being connectable to said motion member for returning said motion member upwardly to said initial position following such downward thrusting of said motion member. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An electromagnetic thrust motor system for use in operating a die set in a punch press and wherein said die set includes a base for mounting base tooling with a plurality of guide pins upstanding from said base and a motion member for mounting upper tooling above said base tooling, said motion member being movable downwardly and upwardly along said guide pins, said electromagnetic thrust motor system comprising:
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a top mounting member adapted to be attached to upper portions of said guide pins above said motion member for positioning said top mounting member above said motion member, a plurality of solenoid windings mounted onto said top mounting member above said top mounting member, each of said solenoid windings having a winding opening extending vertically through said winding, said top mounting member having a respective opening extending vertically therethrough below each of said winding openings and each such respective opening being aligned with the winding opening below which such respective opening is located, ferromagnetic enclosure means at least partially enclosing each of said solenoid windings and defining a passageway extending vertically therethrough above each winding opening and being aligned with the respective winding opening, a plurality of ferromagnetic armatures, each ferromagnetic armature being movable downwardly and upwardly in the respective winding opening, each ferromagnetic armature extending upwardly through the respective passageway in the enclosure means, a plurality of non-magnetic push rods, at least one respective non-magnetic push rod being connected to a respective armature and extending down through a respective opening in said top mounting member and being connected to said motion member for thrusting said motion member downward from an initial position upon electrical energization of said plurality of solenoid windings, and return means mounted on said top mounting member and being connected to said motion member for returning said motion member upwardly to said initial position following such downward thrusting of said motion member. - View Dependent Claims (34, 35, 36)
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37. An electromagnetic thrust motor system for use in operating a die set in a punch press and wherein said die set includes a base for mounting base tooling with a plurality of guide pins upstanding from said base and a motion member for mounting upper tooling above said base tooling, said motion member being movable downwardly and upwardly along said guide pins, said electromagnetic thrust motor system comprising:
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a first mounting member adapted to be attached to upper portions of said guide pins above said motion member for positioning said first mounting member above said motion member, a first solenoid winding mounted onto said first mounting member above said first mounting member, said first solenoid winding having a first winding opening extending vertically through said first winding, said first mounting member having an opening extending vertically therethrough below said first winding opening and being aligned with said first winding opening, first ferromagnetic enclosure means at least partially enclosing said first solenoid winding and defining a passageway extending vertically therethrough above said first winding opening and being aligned with said first winding opening, a first ferromagnetic armature movable downwardly and upwardly in said first winding opening, said first ferromagnetic armature extending upwardly through said passageway in said first enclosure means, at least one non-magnetic push rod connected to said first armature and extending down through said opening in said first mounting member and being connected to said motion member for thrusting said motion member downward from an initial position upon electrical energization of said first solenoid winding, return means mounted on said first mounting member and being connected to said motion member for returning said motion member upwardly to said initial position following such downward thrusting of said motion member, a second mounting member, a plurality of supports extending downwardly from said second mounting member for supporting said second mounting member in spaced relationship above said first mounting member, a second solenoid winding mounted onto said second mounting member above said second mounting member, said second solenoid winding having a second winding opening extending vertically through said second winding, said second mounting member having an opening extending vertically therethrough below said second winding opening and being aligned with said second winding opening, second ferromagnetic enclosure means at least partially enclosing said second solenoid winding and defining a passageway extending vertically therethrough above said second winding opening and being aligned with said second winding opening, a second ferromagnetic armature movable downwardly and upwardly in said second winding opening, said second ferromagnetic armature extending upwardly through said passageway in said second enclosure means, said second ferromagnetic armature being above said first electromagnetic armature and being aligned therewith, at least one non-magnetic push rod extender connected to said second armature and extending down through said opening in said second mounting member and being connected to said push rod for aiding said first armature in thrusting said motion member downward from said initial position upon electrical energization of said second solenoid winding. - View Dependent Claims (38, 39, 40, 41)
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42. An electromagnetic thrust motor for use in operating a die set including a base for mounting base tooling with a plurality of guide pins upstanding from said base and a motion member for mounting upper tooling above said base tooling, said motion member being movable downwardly and upwardly along said guide pins, said electromagnetic thrust motor comprising:
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a top mounting member adapted to be attached to said guide pins above said motion member for positioning said top mounting member above said motion member, at least one solenoid winding mounted onto said top mounting member above said top mounting member, said solenoid winding having a winding opening extending vertically through said winding, said top mounting member having an opening extending therethrough below said winding opening and being aligned with said winding opening, ferromagnetic enclosure means at least partially enclosing said solenoid winding and defining a passageway extending therethrough above said winding opening and being aligned with said winding opening, a ferromagnetic armature movable downwardly and upwardly in said winding opening, said ferromagnetic armature extending upwardly through said passageway defined by said enclosure means, at least one non-magnetic push rod connected to said armature and extending down through said opening in said top mounting member and being connected to said motion member for thrusting said motion member downward from an initial position of said motion member upon electrical energization of said solenoid winding, and return means mounted to said top mounting member and being connectable to said motion member for returning said motion member upwardly to said initial position following such downward thrusting of said motion member. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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Specification