Cutting – Means to drive or to guide tool – Magnet- or solenoid-actuated tool
Patent
1990-06-26
1992-05-19
Yost, Frank T.
Cutting
Means to drive or to guide tool
Magnet- or solenoid-actuated tool
83529, 83530, 72430, 100917, B26D 508
Patent
active
051137364
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.
REFERENCES:
patent: 3695130 (1972-10-01), Fedrigo
patent: 3709083 (1973-01-01), Doherty
patent: 4022090 (1977-05-01), Doherty et al.
patent: 4056029 (1977-11-01), Doherty et al.
Jones Eugenia A.
Yost Frank T.
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