Browse Prior Art Database

Uneven Stiffness Structure for Suspension Static Roll

IP.com Disclosure Number: IPCOM000105788D
Original Publication Date: 1993-Sep-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Inoue, S: AUTHOR [+4]

Abstract

Disclosed is a load beam structure of Head Suspension Assembly (HSA) for creating a static roll angle at the equivalent loaded condition. The principle of the disclosure is made up of achieving uneven residual stress between two flanges at their formed areas. Uneven stress between two flanges can make a load beam twist and consequently creates a static roll angle after a stress-relieving process (heat treatment) of a suspension assembly.

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Uneven Stiffness Structure for Suspension Static Roll

      Disclosed is a load beam structure of Head Suspension Assembly
(HSA) for creating a static roll angle at the equivalent loaded
condition.  The principle of the disclosure is made up of achieving
uneven residual stress between two flanges at their formed areas.
Uneven stress between two flanges can make a load beam twist and
consequently creates a static roll angle after a stress-relieving
process (heat treatment) of a suspension assembly.

      Fig. 1 illustrates a prior even structure and an uneven
structure of this article.  The Uneven Structure in Figure 1 is a
notch-incorporated load beam.  When an Even Structure load beam is
flange-formed and stress-relieved to some extent, its residual stress
is equally balanced because of its symmetrical geometry.  These
evenly-distributed stress areas can not make any static roll angles.
The Uneven Structure load beam, on the other hand, is unbalanced in
its residual stress of its flange-formed areas and can easily be
twisted after the Heat Treatment and make an appropriate static roll
angle.

      Fig. 2 shows the structure having the notch formed at the right
side to generate a negative static roll angle, and the structure
having the notch formed at the left side to generate a positive
static roll angle.

      The Uneven Stiffness Structure of the article is not limited to
the example, the notch-incorporated type, shown here.