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Low Profile Clamping Device for CNC Machining

IP.com Disclosure Number: IPCOM000111432D
Original Publication Date: 1994-Feb-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Miller, BJ: AUTHOR [+3]

Abstract

Disclosed is a pneumatic clamping device as shown in exploded view in Fig. 1. The clamp is actuated by means of a pneumatic cylinder that moves the clevis and operates below the surface of the tooling plates. The motion of the clevis serves to pivot the clamp in such a fashion that it will rotate from its open position to its closed position, thus providing a force normal to the surface of the tooling plate and fixing the stack of work pieces to the tooling plate. The clamp is of a low profile design so it will not interfere with the operation of the CNC machining system. When the clamp is not in use and activated, it will move below the work surface. This permits multiple clamps to be used on a table and/or fixturing device regardless of how many different product dimensions are used.

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Low Profile Clamping Device for CNC Machining

      Disclosed is a pneumatic clamping device as shown in exploded
view in Fig. 1.  The clamp is actuated by means of a pneumatic
cylinder that moves the clevis and operates below the surface of the
tooling plates.  The motion of the clevis serves to pivot the clamp
in such a fashion that it will rotate from its open position to its
closed position, thus providing a force normal to the surface of the
tooling plate and fixing the stack of work pieces to the tooling
plate.  The clamp is of a low profile design so it will not interfere
with the operation of the CNC machining system.  When the clamp is
not in use and activated, it will move below the work surface.  This
permits multiple clamps to be used on a table and/or fixturing device
regardless of how many different product dimensions are used.  Unused
clamping devices may lie below some of the product being clamped by
active clamps.

      Fig. 2 shows the clamp in the active and inactive mode.  The
clamp is a small assembly which is easily removed from the fixturing
device for service and/or replacement.  An example of the use of this
device is in the operation of drilling or routing stacks of printed
circuit boards; however, its use is not limited to this application.
Multiple clamps would be arranged for each station on a drilling or
routing machine and would be positioned to match the sizes of work
pieces.  The clamp is designed to hold down a stack size...