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Fixture for Inboard Beveling of Printed Circuit Boards

IP.com Disclosure Number: IPCOM000108147D
Original Publication Date: 1992-Apr-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 1 page(s) / 48K

Publishing Venue

IBM

Related People

McAtee, DJ: AUTHOR

Abstract

PCB (printed circuit board) tab edge connector bevels can be formed by conventional methods if individual cards are removed from PCB Panel (1) or if individual cards are situated such that tab edges are on panel periphery (2). When tab edges are situated away from the panel periphery (3) it is necessary to perform inboard beveling operation which uses a PCB Router (1 or more spindles) and a drill-like cutting tool. This operation references from the bottom of the PCB and bevels from the top (4). Height of the cutting tool above the reference surface is fixed; this height determines depth of bevel. Bevel depth will vary due to router tolerances and PCB thickness variability (typically 0.001 to 0.010 in.). Typical bevel depth tolerance is + 0.004 in. (5).

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Fixture for Inboard Beveling of Printed Circuit Boards

      PCB (printed circuit board) tab edge connector bevels can be
formed by conventional methods if individual cards are removed from
PCB Panel (1) or if individual cards are situated such that tab edges
are on panel periphery (2). When tab edges are situated away from the
panel periphery (3) it is necessary to perform inboard beveling
operation which uses a PCB Router (1 or more spindles) and a
drill-like cutting tool.  This operation references from the bottom
of the PCB and bevels from the top (4).  Height of the cutting tool
above the reference surface is fixed; this height determines depth of
bevel.  Bevel depth will vary due to router tolerances and PCB
thickness variability (typically 0.001 to 0.010 in.).  Typical bevel
depth tolerance is + 0.004 in. (5).  To eliminate the effect of Panel
thickness variability, the fixture depicted in (6) is disclosed.
This fixture references from the top (cutting tool) side of the PCB.
Same results can be obtained by referencing and cutting from the
bottom side of PCB.

      Disclosed anonymously.