Gas metal arc process sensing and control
Welding automation is normally concerned with directly controlling such factors as current, arc voltage, travel speed, and filler wire speed. There are at least two levels of control beyond present technology which may be identified. The first would involve direct control of weld heat input, cooling rate, and bead geometry (bead width, penetration, and reinforcement). The second would involve direct control of weld defects, microstructure, and properties. Although this second level of control is clearly in the distant future, the first will be achieved in the near future. This work describes the evaluation of a relatively simple steady state model of the gas metal arc (GMA) welding process which considers wire melting and heat input to the base metal, allowing independent control of the heat and mass input to the base metal. This allows direct, independent control of the weld bead reinforcement area and cooling rate to be achieved. 6 refs., 4 figs., 2 tabs.
- Research Organization:
- EG and G Idaho, Inc., Idaho Falls (USA); David W. Taylor Naval Ship Research and Development Center, Bethesda, MD (USA)
- DOE Contract Number:
- AC07-76ID01570
- OSTI ID:
- 5159731
- Report Number(s):
- EGG-M-30385; ON: DE87000775
- Country of Publication:
- United States
- Language:
- English
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