Browse Prior Art Database

TCM Hat Anodization Plating Integrity Tester

IP.com Disclosure Number: IPCOM000120463D
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 1 page(s) / 55K

Publishing Venue

IBM

Related People

Lanzon, GO: AUTHOR [+2]

Abstract

Disclosed is a test system to automatically measure the insulation resistance within the piston holes on anodized thermal conduction module (TCM) hats.

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This is the abbreviated version, containing approximately 75% of the total text.

TCM Hat Anodization Plating Integrity Tester

      Disclosed is a test system to automatically measure the
insulation resistance within the piston holes on anodized thermal
conduction module (TCM) hats.

      In Figure 1, an anodized TCM hat 1 fully populated with pistons
and piston springs is placed on center actuating plate 2.  The center
actuating plate 2 is machined in such a manner as to permit the
alignment of the pistons in the TCM hat with floating test head 3
mounted under top plate 4.  A DC potential is applied through TCM hat
1 and a series circuit, such that a potential exists across a series
resistor 6 when the center actuating plate 2 moves vertically and the
pistons in the TCM hat contact test head 3.  This vertical movement
is sufficient to compress all the piston springs, and, thus, the
pistons, into the piston holes, such that a wiping action occurs
between the pistons and the anodized plating on the piston holes.
Simultaneously, gear motor 7 which is attached to top plate 4 begins
to rotate.  The output shaft of gear motor 7 is attached to eccentric
cam lobe 5, which fits into the mounting assembly of floating test
head 3.  The rotation of eccentric lobe 5 on gear motor 7 produces a
shear force between the pistons on TCM hat 1 and the floating test
head 3.  This shear force pushes the pistons on TCM hat 1 against the
piston hole edge in all directions, to detect any machining burrs on
the piston hole radius.

      The potential across...