ULTRASONIC WELDING PROCESS AND EQUIPMENT FOR CONSTRUCTION OF ELECTRON-TUBE MOUNTS
Quarterly progress rept. no. 13, 1 Jul-30 Sep 1965
AEROPROJECTS INC WEST CHESTER PA
Pagination or Media Count:
Fabrication of the sample lot of 100 type 6080WB electron tubes was completed up to the last step in the assembly sequence. The last step could not be carried out because of a part change. Electrical tests showed that most of the tubes in the sample lot had short circuits. The cause was found to be incorrect assembly prior to welding. Components welding was completed. Welding of 0.003-inch tungsten-rhenium W-3Re wire was carried out with a 300-watt welder. Bond strengths of wires welded to nickel and molybdenum sheets were significantly less than the satisfactory strengths obtained previously with a 600-watt welder. Wires could be welded to tungsten sheet with the 300-watt welder, and average tensile-shear strength of the bonds was 26 percent of the wire strength. Frame grid welding was carried out with a 4-kw welder in an attempt to weld all wire turns on one side rod simultaneously. Satisfactory bonding of all wires was not achieved with this approach.
- Electrical and Electronic Equipment
- Fabrication Metallurgy