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LOW FLOW ARC HEAD VACUUM WELDING

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
16913
Program Year/Program:
1992 / SBIR
Agency Tracking Number:
16913
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Electric Propulsion Laboratory Inc
1040 Synthes Ave Monument, CO 80132
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1992
Title: LOW FLOW ARC HEAD VACUUM WELDING
Agency: NASA
Contract: N/A
Award Amount: $207,673.00
 

Abstract:

ON-ORBIT WELDING FOR EITHER ASSEMBLY OR REPAIR OF FUTURE SPACE STATIONS AND PLATFORMS WILL REQUIRE NOVEL APPROACHES TO THE DESIGN OF THE ARC-TYPE WELDING HEADS, TO ENSURE THAT THIS VERY SUCCESSFUL FORM OF METAL JOINING CAN BE APPLIED IN THE VACUUM OF SPACE. IN PARTICULAR, THE CLEAN WELDS ACCOMPLISHED USING THE TUNGSTEN INERT-GAS (TIG) AND PLASMA WELDING APPROACHES MAKE THESE COMMON AND FAIRLY WELL UNDERSTOOD TECHNIQUES HIGHLY DESIRABLE FOR SPACE APPLICATION. ALTHOUGH AIR CONTAMINATION IS NOT A PROBLEM IN SPACE, EXISTING COMMERCIALLY AVAILABLE TIG AND PLASMA WELDING HEADS REQUIRE LARGE INERT-GAS FLOW RATES (APPROX. 1-10 LITERS/MIN.) FOR ARC STABILITY. THIS GAS-CONSUMPTION REQUIREMENT IS UNACCEPTABLE FOR A PRACTICAL SPACE-BASED WELDING TECHNIQUE. A NOVEL METHOD OF LOWERING THIS GAS CONSUMPTION WILL BE DEVELOPED BY USING A HOLLOW CATHODE IN PLACE OF A SOLID TUNGSTEN CATHODE ELECTRODE TO REDUCE THE INERT-GAS FLOW REQUIREMENT TO APPROX. 0.02 LITERS/MIN. FOR WELD CURRENTS OF HUNDREDS OF AMPERES. ON-ORBIT WELDING FOR EITHER ASSEMBLY OR REPAIR OF FUTURE SPACE STATIONS AND PLATFORMS WILL REQUIRE NOVEL APPROACHES TO THE DESIGN OF THE ARC-TYPE WELDING HEADS, TO ENSURE THAT THIS VERY SUCCESSFUL FORM OF METAL JOINING CAN BE APPLIED IN THE VACUUM OF SPACE. IN PARTICULAR, THE CLEAN WELDS ACCOMPLISHED USING THE TUNGSTEN INERT-GAS (TIG) AND PLASMA WELDING APPROACHES MAKE THESE COMMON AND FAIRLY WELL UNDERSTOOD TECHNIQUES HIGHLY DESIRABLE FOR SPACE APPLICATION. ALTHOUGH AIR CONTAMINATION IS NOT A PROBLEM IN SPACE, EXISTING COMMERCIALLY AVAILABLE TIG AND PLASMA WELDING HEADS REQUIRE LARGE INERT-GAS FLOW RATES (APPROX. 1-10 LITERS/MIN.) FOR ARC STABILITY. THIS GAS-CONSUMPTION REQUIREMENT IS UNACCEPTABLE FOR A PRACTICAL SPACE-BASED WELDING TECHNIQUE. A NOVEL METHOD OF LOWERING THIS GAS CONSUMPTION WILL BE DEVELOPED BY USING A HOLLOW CATHODE IN PLACE OF A SOLID TUNGSTEN CATHODE ELECTRODE TO REDUCE THE INERT-GAS FLOW REQUIREMENT TO APPROX. 0.02 LITERS/MIN. FOR WELD CURRENTS OF HUNDREDS OF AMPERES.

Principal Investigator:


0

Business Contact:

Small Business Information at Submission:

Electric Propulsion Laboratory
440 N Green St Tehachapi, CA 93561

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No