Browse Prior Art Database

Domelock Low Profile Suspension to Arm Attachment Method

IP.com Disclosure Number: IPCOM000115527D
Original Publication Date: 1995-May-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 4 page(s) / 107K

Publishing Venue

IBM

Related People

Frater, N: AUTHOR [+2]

Abstract

The DOMELOCK invention allows to attach two head/suspension assemblies to an aluminum, magnesium or beryllium actuator comb for disk to disk spacings less than 1.8 mm without using INTERLOCK* swage technology. It also allows reduction of the rotational inertia beyond that possible using INTERLOCK swage mount plates. The assembly process is low cost and reworkable at the actuator level.

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This is the abbreviated version, containing approximately 52% of the total text.

Domelock Low Profile Suspension to Arm Attachment Method

      The DOMELOCK invention allows to attach two head/suspension
assemblies to an aluminum, magnesium or beryllium actuator comb for
disk to disk spacings less than 1.8 mm without using INTERLOCK* swage
technology.  It also allows reduction of the rotational inertia
beyond that possible using INTERLOCK swage mount plates.  The
assembly process is low cost and reworkable at the actuator level.

INSIDE CONFIGURATION - The DOMELOCK invention consists of either one
HSA or two HSAs joined at their bases in which one or more
protuberances (the "domes") have been formed.  The protuberances
produce an interference force when the HSAs are positioned into a
slot cut in the arm or actuator comb.  The normal and frictional
forces produced by the interference fit are sufficient to restrain
the HSAs from movement during shipping, operational shocks,
accessing, crash stops and start/stop loadings.

      Alternately, a separate mounting plate of equal or different
thickness and made from the same or different material can be used to
attach the protuberances and the one or two HSAs.  Alternately the
protuberances can be molded or formed into the mounting plate and the
one or two HSAs are attached to the mounting plate.

      One HSA is welded to each side of a common mount plate as shown
in Fig. 1.  One HSA has an extension of its load beam material to the
back edge of the mount plate but the other HSA load beam is
terminated about half way to the back edge.  The load beam extension
to the back edge of the mount plate has two formed dimples or domes
which extend away from the mount plate surface.  Both HSAs are welded
to the mount plate.

      The actuator comb has one or more arms.  A slot is cut in the
tip of each arm a little smaller than the combined thickness of the
mount plate, the load beam material and the height of the formed
dimples or domes.  The mount plate and two HSAs are forced into the
slot in the arm tip, deforming the tops of the dimples or domes.  The
interference crea...