DEVELOPMENT OF OPTICAL TOOLING BAR
GENERAL DYNAMICS/ASTRONAUTICS SAN DIEGO CA
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This report describes recent developments respecting two prototype optical tooling bars of bonded sandwich construction. The core material for the first bar was Hexcel 5052-H39 aluminum alloy honeycomb core, 14 in. cell size, .003 in. foil gauge, density 6 lb. cu. ft. The second bar provided a unique application for a relatively new core material known commercially as Trussgrid. This is a corrugated core, also of 5052-H39 aluminum alloy, 332 height, .002 in. foil gauge, density 5.7 lbs. cu. ft. possessing unique qualities such as inherent strength and rigidity, ease of fabrication and machining to close tolerances. This core material facilitated a unique feature in the design of the second bar providing an integral bed way for the rails with resulting weight saving and fabrication advantages. Both bars have aluminum alloy facings and functionally, are an improvement over the original bar of extruded sections reinforced with side panels of phenolic honeycomb.
- Fabrication Metallurgy
- Machinery and Tools