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Magnetic Head Assembly and Grinding Fixture

IP.com Disclosure Number: IPCOM000078744D
Original Publication Date: 1973-Mar-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Brock, GW: AUTHOR [+3]

Abstract

This fixture provides support for both assembly and grinding of multi-track magnetic heads. In addition to providing support during grinding, it also provides means for obtaining close tolerances of dimensions and straight gap lines. Fig. 1 shows the fixture 10 with a head assembly 12 in place ready or grinding. As shown in the sectional view of Fig. 2, the head is supported at its ends by pins 14 which engage the bottoms of each of the subassemblies which form the head. The bottoms of the subassemblies include datum surfaces 16 located to nest about the pins. Prior to assembly the tolerances of the head subassemblies are measured, and the diameter of pins 14 are then selected to adjust the head tolerances. The ends of the head subassemblies are held against pins 14 by clamps 18.

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Magnetic Head Assembly and Grinding Fixture

This fixture provides support for both assembly and grinding of multi-track magnetic heads. In addition to providing support during grinding, it also provides means for obtaining close tolerances of dimensions and straight gap lines. Fig. 1 shows the fixture 10 with a head assembly 12 in place ready or grinding. As shown in the sectional view of Fig. 2, the head is supported at its ends by pins 14 which engage the bottoms of each of the subassemblies which form the head. The bottoms of the subassemblies include datum surfaces 16 located to nest about the pins. Prior to assembly the tolerances of the head subassemblies are measured, and the diameter of pins 14 are then selected to adjust the head tolerances. The ends of the head subassemblies are held against pins 14 by clamps 18.

The subassemblies are located within extremely flat and hard clamping jaws
22. The assembly is brought together within jaws 22 by slide 24, which is tightened with a high torque action against the assembly by clamping bolt 26. The combination of jaw hardness and flatness, together with the high-clamping force, provides for straight gap lines within the head. This would also be true of the situation where more than one set of gaps is in a head assembly.

Tie bolts, not shown, are inserted through ports 28 of the fixture to join the head subassemblies. The bolts also provide for protection against shock damage during grinding. The use of adhesive...