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Resistance Projection Welding Recipe for Write Read Head Suspension Carrier

IP.com Disclosure Number: IPCOM000037768D
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Goodrich, RA: AUTHOR

Abstract

A disk drive head suspension is formed of 300 series of stainless steel materials. Magnetic force projection welding is used to minimize the amount of material required to provide a strong assembly using two sheets of steel.

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Resistance Projection Welding Recipe for Write Read Head Suspension Carrier

A disk drive head suspension is formed of 300 series of stainless steel materials. Magnetic force projection welding is used to minimize the amount of material required to provide a strong assembly using two sheets of steel.

The structure of the suspension is shown in the figure. A top piece 12 is wider at one end and narrows at the point where it attaches to the disk drive head. The top piece is bent near its edges so that the cross section of the edges meets with bottom piece 14 of similar shaped steel. Each edge 16 of the bottom piece 14 is stamped with projections for affixing to top piece 12 by means of magnetic force resistance welding.

By using magnetic force resistance welding as opposed to standard resistance spot and projection types, less overlap material is required, thereby reducing overall weight of the suspension. Lower ampere flow and electrode pressure is required. As refine grain materials grow with heat, a solid state weld is produced with 1% of the weld energy and 30% of the electrode contact force. A recrystalized grain is refined by forging force that is supplied by an electro- magnetic electrode follow-up force feature of the magnetic force equipment.

Disclosed anonymously.

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