Browse Prior Art Database

Toggle Drive and Control for Punch

IP.com Disclosure Number: IPCOM000080834D
Original Publication Date: 1974-Feb-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Fine, RA: AUTHOR

Abstract

A beam used for kinetic energy storage and release actuation of a punch mechanism is excited by adding energy, using an electromagnet acting at the antinode of the beam.

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Toggle Drive and Control for Punch

A beam used for kinetic energy storage and release actuation of a punch mechanism is excited by adding energy, using an electromagnet acting at the antinode of the beam.

In the figure, the electromagnetic input is replaced by a toggle mechanism driven by an electromagnet 3. The toggle mechanism includes an armature 4, links 5 and 6 and connecting flexure pivots 7, 8 and 9. A beam 10 is cantilevered from the surface 11 and carries a punch element 12. As the toggle mechanism is driven so that links 5 and 6 move to the position 5' and 6' and return, the beam 10 moves to the dotted position 10' and returns. During this oscillation, the punch element 12 located at the node is substantially motionless.

When a punching cycle is desired, the armature 4 draws the toggle mechanism over center or to the left of the vertical straight line alignment and is held by electromagnet 3, whereupon beam 10 oscillates to the dotted line position 10'' causing the punch element 12 to move through a work stroke. When the toggle mechanism is in an overcenter position, the additional force exerted as the beam moves to the position 10'' causes armature 4 to be driven into intimate contact with electromagnet 3, rather than being induced to break contact with the magnet 3.

In the alternative, electromagnet 3 may be placed to prevent overcenter travel of the toggle mechanism. In this design, the magnet 3 would have to resist the force of beam 10 during the wo...