Browse Prior Art Database

LEAF SPRING IN A TAPER LAPPING FIXTURE

IP.com Disclosure Number: IPCOM000014400D
Original Publication Date: 1999-Oct-01
Included in the Prior Art Database: 2003-Jun-19
Document File: 1 page(s) / 34K

Publishing Venue

IBM

Related People

M ZUNG: AUTHOR [+2]

Abstract

The conventional taper lapping tool incorporates a clamping pin that seats the quad carrier against a tuned back plate to lap the taper into the solid row of sliders at the desired angle. With the cover engaged, the compliant pins contact the top of the carrier encouraging direct contact between the leading edge of the row and the lapping plate. The compliant pin force is applied through compressed coil springs. The contact force applied to the carrier is adjustable by means of controlling the compression of the coil springs.

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LEAF SPRING IN A TAPER LAPPING FIXTURE

   The conventional taper lapping tool incorporates a clamping pin that seats the quad carrier against a tuned back plate to lap the taper into the solid row of sliders at the desired angle. With the cover engaged, the compliant pins contact the top of the carrier encouraging direct contact between the leading edge of the row and the lapping plate. The compliant pin force is applied through compressed coil springs. The contact force applied to the carrier is adjustable by means of controlling the compression of the coil springs.

   The current lapping fixture introduces several variables that affect the taper angle and taper length distribution for the length of the row. The adjustable back plate angle affects the taper angle for the row. With the ability to adjust comes the unreliability of the angle to drift more readily. Also, the design of the compliant pin scheme introduces several areas for irregular friction losses that will contribute to higher standard deviation of lapped taper length. The coil springs experience interference along the walls of the counterbore that contain them. The enlarged ends of the pins also experience frictional losses against these same walls. The length of the pins experiences frictional losses at the orifices through which they pass. Because of the long length, these pins also do not maintain alignment stability.

   The new eliminated the ability of the back plate to drift through slippage. The newl...