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Compliant Device for Disk Stack Assembly

IP.com Disclosure Number: IPCOM000061958D
Original Publication Date: 1986-Aug-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Severson, RL: AUTHOR [+2]

Abstract

The disk stack assembly device provides a means of compressing a disk stack to achieve minimal resultant component distortion after clamping. A disk stack which does not have hub to disk/ spacer registration and must use tooling as a means of centering components during assembly may exhibit disk distortion and inconsistent centering caused by a rigid tooling system. A device incorporating axial and radial compliance in the tooling provides advantages over the rigid assembly systems.

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Compliant Device for Disk Stack Assembly

The disk stack assembly device provides a means of compressing a disk stack to achieve minimal resultant component distortion after clamping. A disk stack which does not have hub to disk/ spacer registration and must use tooling as a means of centering components during assembly may exhibit disk distortion and inconsistent centering caused by a rigid tooling system. A device incorporating axial and radial compliance in the tooling provides advantages over the rigid assembly systems.

A typical disk stacking tool holds the hub securely by the shaft and supports it from underneath. When the disks, spacers, etc, are placed onto the hub and compressed by a ram in an axial direction, the tool surfaces remain parallel. However, disk stacks are made up of many parts, all exhibiting small nonparallel and/or nonflat characteristics. The buildup of t characteristics causes uneven axial forces when compressed in the rigid assembly tooling. Also, as the disk stack is compressed and the various surfaces load up and comply to each other, radial forces are generated which tend to force the nonregistered components away from the centering tools. The results of these two problems after the disk stack is clamped and removed from the tooling are high disk distortion and inconsistent centering.

In the compliant device illustrated, the ram 3 applies the required force onto the disk stack. The ram 3 has a spherical radius 4 generated from a cent...