Electric heating – Metal heating – By arc
Patent
1984-12-03
1986-09-23
Shaw, Clifford C.
Electric heating
Metal heating
By arc
219137PS, 901 42, B23K 910
Patent
active
046137432
ABSTRACT:
A robotic arc welding system has an integrated vision sensor to image and analyze the weld scene in real time. The most effective weld puddle geometry discriminants for use in an adaptive feedback control, to assure full penetration welds, are weld puddle area and maximum width. The adaptive control system determines a puddle geometry error and a correction to nominal welding current to change the heat input to the weld pool, regulating a combination of puddle area and width, or only puddle area under some welding conditions, to control weld quality during the welding process. Arc voltage is modulated to reflect changes in welding current and maintain constant arc length.
REFERENCES:
R. W. Richardson, et al., "A Vision Based System for Arc Weld Pool Size Control", Measurement and Control for Batch Manufacturing, ed. by D. E. Hardt, ASME, Nov. 14-19, 1982, pp. 65-75.
R. D. Richardson, et al., "The Measurement of Two-Dimensional Arc Weld Pool Geometry by Image Analysis", Control of Manufacturing Processes and Robotic Systems, ed. by D. E. Hardt & W. J. Book, ASME, Nov. 13-18, 1982, pp. 137-148.
L. M. Sweet et al., "Closed-Loop Joint Tracking, Puddle Centering and Weld Process Control Using an Integrated Weld Torch Vision System", Control of Manufacturing Processes and Robotic Systems, ed. by D. E. Hardt and W. J. Book, ASME, Nov. 13-18, 1983, pp. 97-105.
L. M. Sweet et al, "Sensors and Controls for Robotic Arc Welding", International Machine Tool Conference, Chicago, Sep. 5-13, 1984, pp. 9-54 to 9-69.
Baheti Radhakisan S.
Nied Herman A.
Campbell Donald R.
Davis Jr. James C.
General Electric Company
Shaw Clifford C.
Webb II Paul R.
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