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US 5,113,736 AGranted
Electromagnetically driven punch press with magnetically isolated removable electromagnetic thrust motor
OwnerGeorge M. Meyerleinventor
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OwnerGeorge M. Meyerleinventor
Estimating the term…
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.
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:
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:
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:
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:
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:
Dependencies are inferred from the claim text.