Browse Prior Art Database

Actuator Assembly Fixture

IP.com Disclosure Number: IPCOM000109725D
Original Publication Date: 1992-Sep-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 5 page(s) / 167K

Publishing Venue

IBM

Related People

Barenboim, M: AUTHOR [+5]

Abstract

This article describes a fixture which allows for automatic assembly for a direct-access storage device (DASD) drive actuator.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Actuator Assembly Fixture

       This article describes a fixture which allows for
automatic assembly for a direct-access storage device (DASD) drive
actuator.

      All DASDs share the same concept of having an actuator assembly
(vertical or horizontal alike) which contains a head suspension
assembly (HSA).  The number of HSAs depends on the type of the drive.
The actuator in this disclosure contains 16 HSAs.  They are attached
to the actuator's base, or comb, by a swaging process.  This process
forms a permanent joint of two parts by piercing an oversized steel
ball through these parts, thus expending one material within another.

      Referring to the drawings, Fig. 1 shows actuator assembly 1.
It consists of sub-assemblies, HSAs 2 and 3, comb 4 with its bearing
5 and swage holes 6, and cable 7.  The actuator shown herein has a
total of sixteen HSAs: eight top HSAs 2, and eight bottom HSAs 3.
The term top and bottom describes a relative position of the
read/write head in respect to the drive's disks.  A separator 8
prevents HSAs' heads 9 from touching each other (and therefore
damaging the heads) prior to installing the actuator into a disk
drive.

      Fig. 2 shows top and bottom HSA sub-assemblies 2 and 3 prior to
their installation into comb 4 (Fig. 1).  The HSAs consist of a load
beam 10, head 9, and a wire holder 11.  This wire holder is removed
after the HSA is swaged to a comb and wires are bonded to a cable.
The load beam 10 is formed with a bend 12 for an HSA functional
purpose.

      Figs. 3A, 3B, 4, 5, 6 and 7 are perspective views showing
fixture 13 of this disclosure at various stages of the assembly
process of the actuator.  Figs. 3A and 3B depict an empty fixture
attached to a carrier 14 which carries the fixture throughout the
assembly line.  Comb 4 is located and clamped within the fixture, as
shown in Fig. 4.  Fig. 5 shows cable 7 located and secured to the
comb.  Fig. 6 depicts the first group of eight (top) HSAs merged and
sw...