Accession Number : AD0286165

Title :   Development of Ultrasonic Welding Equipment for Refractory Metals

Descriptive Note : Interim technical progress rept. 1 May-31 Jul 1962

Corporate Author : AEROPROJECTS INC WEST CHESTER PA

Personal Author(s) : Maropis, Nicholas

PDF Url : AD0286165

Report Date : Aug 1962

Pagination or Media Count : 46

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.

Descriptors :   *INDUSTRIAL EQUIPMENT, *SPOT WELDING, *ULTRASONIC WELDING, CHROMIUM ALLOYS, COBALT ALLOYS, MOLYBDENUM ALLOYS, NICKEL ALLOYS, NIOBIUM ALLOYS, POWER SUPPLIES, REFRACTORY MATERIALS, SHEETS, STAINLESS STEEL, TRANSDUCERS, TUNGSTEN

Subject Categories : Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE