Ultrasonic Welding of Helicopter Secondary Structure Components.
Final rept. 1 Jul 76-30 Jun 77,
SONOBOND CORP WEST CHESTER PA
Pagination or Media Count:
Ultraonic welding was evaluated as a means for assembling helicopter secondary structures. Such welds in several combinations of 2024- and 6061 aluminum alloys demonstrated tensile-shear strengths of more than 2.5 times the strength of resistance spot welds. Inner and outer skins of helicopter doors 0.020-inch 2024-T3 Alclad to 0.025-inch 6061-T6 Alclad aluminum alloys assembled by this process successfully withstood air loads of five to ten times the design loading for the door. A process specification for use of ultrasonic welding in nostructural and secondary structure components for AAH aircraft was prepared for use at Hughes Helicopters. It was recommended that the process be validated for other materials and material combinations and that ultrasonic welding and ultrasonic weld bonding be evaluated for aircraft primary structures.
- Fabrication Metallurgy