Browse Prior Art Database

Thick Metallic Flange

IP.com Disclosure Number: IPCOM000086919D
Original Publication Date: 1976-Nov-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Manca, A: AUTHOR [+2]

Abstract

A thick metallic flange 10 (Fig. 1) is provided as the frame member to which the substrate (not shown) is brazed. The substrate is positioned in the opening within the flange and is brazed onto the top of the lip 12. The flange 10 has a thermal expansion cutout 14 (Fig. 2) located so as to relieve the strain between the substrate and the flange 10 caused by an expansion difference therebetween at elevated temperatures developed when the substrate is brazed onto the lip 12 of the flange 10.

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Thick Metallic Flange

A thick metallic flange 10 (Fig. 1) is provided as the frame member to which the substrate (not shown) is brazed. The substrate is positioned in the opening within the flange and is brazed onto the top of the lip 12. The flange 10 has a thermal expansion cutout 14 (Fig. 2) located so as to relieve the strain between the substrate and the flange 10 caused by an expansion difference therebetween at elevated temperatures developed when the substrate is brazed onto the lip 12 of the flange 10.

This arrangement eliminates an intermediary baseplate to which the substrate was brazed and which in turn was positioned on the flange. The base plate was held in place by a "C" seal which provided a seal between a cover and the baseplate. When the arrangement was disassembled, it required re- registration of the substrate with respect to the frame each time.

The present arrangement of a single thick flange 10 to which the substrate is brazed, requires one registration only that is established at the time of brazing. A single set of tooling, namely the brazing fixture, wilt accurately position the substrate with respect to a reference on the thick flange 10. This accurate position, once established during the brazing process, remains undisturbed through all assembly/ disassembly operations. The cavity 16 for receiving the "C" seal 18 can be machined into the flange 10 and, therefore, a more predictable squeeze can be applied to the "C" seal 18.

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