DEVELOPMENT OF ULTRASONIC WELDING EQUIPMENT FOR REFRACTORY METALS
Final technical engineering rept. 15 Feb 1962-31 Aug 1966
AEROPROJECTS INC WEST CHESTER PA
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Ultrasonic welding equipment consisting of a highly stable and precisely adjustable motor-alternator frequency converter, new cartridge-type ceramic transducers exhibiting overall efficiencies in the range of 75 to 85 percent, and heavy-duty, force-insensitive acoustic coupling systems were developed andor designed, built, and successfully utilized with the view to spot welding such refractory metals and superalloys as Rene 41, Mo-0.5Ti alloy, columbium, PH15-7Mo stainless steel, and tungsten. The equipment provides for programming the electrical power delivered to the transducers and the clamping force applied to the weldment so that improved impedance matching and better control of the welding process can be effected. Ultrasonic spot-type welds were made with this equipment in materials and thicknesses not heretofore achievable.
- Fabrication Metallurgy