Naval Research Laboratory, 4555 Overlook Ave. S.W. WASHINGTON,D.C. 20375

34 -- PRECISION WELDING AND BONDING SYSTEM SOL N00173-96-Q-0138 DUE 081996 POC Diane Freeland Purchasing Agent, (202) 767-3667, FAX (202) 404-8158. Naval Research Laboratory has a requirement for a complete turnkey system for light force and heavy force parallel gap welding to accomodate gold, kovar, copper and other common electric bonded metal with ribbon width of 7, 10, 20, and 33 mils, throat depth of 12 inches or greater, intergrated system including at least baseplate, weld head mounts, optics, illuminator, dc welding power supply (dc constant voltage), parallel gap welder heads, cables, foot pedal, deep access parallel gap electrodes, burnishing disks and stone. Welding power supply should provide constant voltage direct current welding pulse, adjustable pulse duration (1ms to 9999 ms), adjustable voltage amplitude (0.01V to 1.1V), self adjusting current pulse waveform to maintain constant weld voltage (up to 600 A), supports up to 60 welds/min, constant voltage regulation within 25mV, and manual selected weld voltage and weld duration. Light force welding head should have a stroke of 0.75 in., force selection via digital indicator, force calibration of +/- 2% and includes calibration curve, adjustable electrode gap of 0-40 mils and a work height of 0 to 5.5 inches. Heavy force welding head should have adjustable electrode gap of 0-40 mils and be continually adjustable, have adjustable electrode travel up to 0.50 inches, and adjustable electrode force of 4 oz to 10lb and max step of 0.025 inches. Optics should be stereo-zoom microscope of 0.7x to 3.0x. Oral request will not be accepted. (0232)

Loren Data Corp. http://www.ld.com (SYN# 0201 19960820\34-0001.SOL)