Automated Cold Working Using Split Mandrel Technology 2001-01-2568
In order to support the T-38 Wing Life Improvement program, the Materials and Process Product Support group was requested to perform a metallurgical examination of a test article containing several cold expanded holes drilled in an aluminum/aluminum and an aluminum/steel assembly. The assembly, complete with a wing skin which were composed of a trunnion or landing ear rib, and a tip rib, was designed to represent a miniature T-38 wing and was used to determine the feasibility of cold expanding or cold working of holes drilled in T-38 wings using automated machinery incorporating a split mandrel process per Process Specification FH-114.
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