Development of Ultrasonic Welding Equipment for Refractory Metals
Abstract
Work has advanced toward the development, design, and construction of a 25-kilowatt spot-type weld unit and associated power source . The design of the welded framework has been completed, in addition to various welding control circuits. Evaluations have continued in isolating and resolving problems relating to critical components of the 25-kilowatt unit, among which are ceramic washer type transducer assemblies, acoustic coupling elements, and power-force programming circuitry. Weldment and tip material investigations continue, with the view of establishing firm data on refractory metal weldability characteristics, and terminal element selection. Performance studies point to substantiation of Astroloy and Udimet 700 as similarly satisfactory tip alloys for welding refractory metals. Utilization of ceramic transducer assemblies, under the tension-shell concept, has established, at the lower-power levels, a power-conversion efficiency in excess of projected limits. The performance of the aluminum-bronze coupler, fabricated during prior study, exceeds that of standard steel units. Performance appears enhanced by sculpturing to provide flexural relief. Specifications for a 25-kilowatt motor-alternator and associated switching requirements are being established and procurement of the necessary components therefor will follow.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1962
- Accession Number
- AD0286165
Entities
People
- Nicholas Maropis