Browse Prior Art Database

Adaptive Punch System (HDC Packaging)

IP.com Disclosure Number: IPCOM000101869D
Original Publication Date: 1990-Sep-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Frankeny, JA: AUTHOR [+2]

Abstract

Disclosed is a system that allows the movement of the magnetic repulsion punch to be detected to synchronize the firing of the punch.

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This is the abbreviated version, containing approximately 100% of the total text.

Adaptive Punch System (HDC Packaging)

       Disclosed is a system that allows the movement of the
magnetic repulsion punch to be detected to synchronize the firing of
the punch.

      The present design of the magnetic repulsion punch uses a flat
ribbon coil with a post in the center to provide one of the
electrical contacts.  See the figure.  The center post now is solid
brass, .100 inch in diameter.

      In this invention, a .100 inch diameter tube 5 has a
cylindrical capacitance probe made of a solid pin 1, dielectric 2 and
outer conductor 3 inserted in its center insulator by dielectric 4.
This cylindrical capacitor forms an electric field 6 when energized
by an AC-excited capacitance bridge.  The punch face 7 affects this
field depending on its position from the coil face 8.  By calibrating
the capacitance, the punch position can be determined to synchronize
firing, allowing adaptive feedback.

      For details of coil design, see the preceding article.