F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
327/29, 74/54
F16H 25/04 (2006.01) B23H 7/28 (2006.01) B23Q 1/62 (2006.01) B23Q 5/34 (2006.01) F16H 37/12 (2006.01)
Patent
CA 1037292
APPARATUS FOR OBTAINING RELATIVE ORBITAL MOVEMENT IN ELECTRICAL DISCHARGE MACHINING Abstract of the Disclosure A pair of orthogonal drive shafts carry cams which are coupled to a platform for orbital movement of the platform. The platform supports a workpiece below an electrode in an electrical discharge machining operation. The cams are cy- lindrical segments which extend axially at an acute angle to their respective drive shafts so as to present a changing throw along the axial extent of the cams and the coupling means is selectively adjustable along the axial extent of the cams to enable selection of the amplitude of the orbit. In another embodiment, a single drive shaft carries cams each having a throw extending perpendicular to the drive shaft and a further cam having a throw parallel to the drive shaft. The cams are coupled to a platform for or- bital movement of the platform and have changing throws in the respective directions of the throws to enable selection of the amplitude of the orbit.
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