Browse Prior Art Database

Stacked Actuator, High Stiffness, Adhesively Bonded

IP.com Disclosure Number: IPCOM000123969D
Original Publication Date: 1999-Sep-01
Included in the Prior Art Database: 2005-Apr-05
Document File: 1 page(s) / 49K

Publishing Venue

IBM

Related People

Prater, W: AUTHOR

Abstract

Disclosed is a disk drive actuator comb design that has low rotational moment of inertia and high stiffness. The comb is made by stacking individual components and adhesively bonding them together to make an E-block assembly. The E-block component are individual arms (without head-gimble-assemblies, HGAs), spacer rings, coil yoke, a top clamp ring or a nut and pivot and pivot bearing, see figure. Arms and coil yokes are made of high modulus low density materials, such as but not limited to: metal matrix composites reinforced with ceramics particles or fibers, beryllium aluminum alloys or ceramics. The components are most economically mass produced by stamping, blanking, or laser scribing from sheets.

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Stacked Actuator, High Stiffness, Adhesively Bonded

Disclosed is a disk drive actuator comb design that has
low rotational moment of inertia and high stiffness.  The comb is
made by stacking individual components and adhesively bonding them
together to make an E-block assembly.  The E-block component are
individual arms (without head-gimble-assemblies, HGAs), spacer
rings, coil yoke, a top clamp ring or a nut and pivot and pivot
bearing, see figure.  Arms and coil yokes are made of high modulus
low density materials, such as but not limited to: metal matrix
composites reinforced with ceramics particles or fibers, beryllium
aluminum alloys or ceramics.  The components are most economically
mass produced by stamping, blanking, or laser scribing from sheets.
The spacer rings, nut and clamp ring are made of a less expensive
material, such as aluminum, because they do not require an increased
modulus, and because they are located at a small enough radius as to
have negligible effect on rotational inertia.  Interface surfaces on
the components where they make contact with each other are textured
to insure good capillary flow of the adhesive, thus ensuring good
joint integrity between arms, coil yoke and spacer rings.  A flanged
pivot bearing is adhesively bonded to the arms, yoke and spacer rings
to form the E-block assembly, thus ensuring good joint integrity
between the pivot bearing and the E-block components.  After adhesive
application the arm-spacer stack is held in c...