AUTOMATIC PIPE WELDING: REAL-TIME CONTROL OF WELD SIZE, SHAPE, AND PENETRATION USING THE ELECTRODYNAMIC ARC AND PUD-DLE CONTROL SYSTEM

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$487,419.00
Award Year:
1989
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
7747
Agency Tracking Number:
7747
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Po Box 9652, Fort Collins, CO, 80525
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Charles Connelly
() -
Business Contact:
JOHN A FILIPPELLO
(303) 493-1114
Research Institution:
n/a
Abstract
AUTOMATIC PIPE WELDING, FOR BOTH NEW CONSTRUCTION AND REPAIRWELDING, CURRENTLY DEPENDS UPON OPERATOR SKILL AND OTHER CONTROLS TO ASSURE SOUND WELDED JOINTS. ADDITIONAL EXPENSESSUCH AS X-RAY INSPECTION COMBINE TO MAKE THE COSTS OF ANY NECESSARY REWORK OF WELDED PIPES PROHIBITIVE. ELECTRODYNAMIC ARC AND PUDDLE CONTROL (EDAP) IS A THROUGH-THE-ARC METHOD OF SENSING BOTH WELD PUDDLE SIZE AND PENETRATION, WITH REAL-TIME CONTROL. THE SYSTEM DOES NOT REQUIRE ACCESS FROM THE BACK SIDE NOR EXTERNAL SENSORS IN THE HARSH ENVIRONMENT OF THE WELDING ARC. POLY-PULSE WELDING (SQUARE WAVE MILLI-PULSE WITH SUPERIMPOSED MICROPULSE), BY SELECTED COMBINED FREQUENCIES, WILL CHANGE WELD BEAD SHAPE, I.E., A NARROW PENETRATING BEAD FOR ROOT PASSES OR A WIDE SMOOTH BEAD FOR THE CAP PASS. THIS TECHNIQUE ELIMINATES THE NEED FOR CUMBERSOME MECHANICAL OSCILLATORS ON THE WELD HEAD AND IS PROGRAMMABLE. THE IDEALMETHOD FOR THE HIGHEST QUALITY OF PIPE WELDING IS TO COMBINETHE EDAP CONTROL WITH THE POLY-PULSE PROCESS. THIS WILL PROVIDE, FOR THE FIRST TIME, REAL-TIME CONTROL OF THE FINAL WELDED JOINT THAT IS BOTH AUTOMATIC AND PROGRAMMABLE. THIS RESEARCH PROJECT SHOULD PROVE THE FEASIBILITY OF THIS NEW CONCEPT.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government