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Browse Prior Art Database

Multiple Force And Position Declamping Operation

IP.com Disclosure Number: IPCOM000120817D
Original Publication Date: 1991-Jun-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 2 page(s) / 59K

Publishing Venue

IBM

Related People

Clark, T: AUTHOR [+3]

Abstract

A mechanism is disclosed to declamp a variety of fixtures for module encapsulation in semiconductor manufacturing operations. The tool was developed to handle many different sized parts with a wide range of capping forces in a single automated station with a minimum of change- over and complexity. Declamping and force control is uniquely achieved using a programmable pressure regulator and pneumatic air cyclinders as an aternative to a stepper motor controlled arrangement. Other mechanisms integrated into the tool allow for the removal of the spring fixtures from the product and their subsequent placement onto an automated conveyor system.

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Multiple Force And Position Declamping Operation

      A mechanism is disclosed to declamp a variety of fixtures
for module encapsulation in semiconductor manufacturing operations.
The tool was developed to handle many different sized parts with a
wide range of capping forces in a single automated station with a
minimum of change- over and complexity.  Declamping and force control
is uniquely achieved using a programmable pressure regulator and
pneumatic air cyclinders as an aternative to a stepper motor
controlled arrangement.  Other mechanisms integrated into the tool
allow for the removal of the spring fixtures from the product and
their subsequent placement onto an automated conveyor system.

      The figure illustrates the programmable pressure regulator 1
which controls the dual air cylinders 2 which drive the pressure
plate 3 up and down, enabling the lifting of the spring fixture 4
away from the product.  Shock absorbers 5 and bearings 6 dampen and
guide the pressure plate.  Locator blocks (not shown) maintain
orientation between the pressure plate 3 and the fixture spider 7.
When actuated, the pressure plate 3 slowly descends and depresses the
fixture springs with the correct force to allow the unlocking of a
central screw 8 in a controlled fashion.  A pneumatic rotary actuator
9 powers the central screwdriver 10 to unlock the screw 8.  Two low
profile, pneumatic gripper jaws 11 clamp the spring fixture 4 and
retain it after declamping, freeing the p...