Electric heating – Metal heating – By arc
Patent
1984-08-16
1986-03-25
Shaw, Clifford C.
Electric heating
Metal heating
By arc
21913001, 219136, 358101, B23K 912
Patent
active
045785619
ABSTRACT:
The surface of the molten weld pool and surrounding workpiece area are floodlighted during an arc welding operation by a narrowband light source such as a laser in order to highlight the pool boundary and yield an image which is easily computer processed to give the pool perimeter. An arc welding torch has built-in optical systems, one to route laser energy via a coherent optical fiber bundle to exit optics on the torch to project two spots of light onto the trailing side edges of the pool, another to image the weld region which is relayed to a remote camera. The difference between reflectance values and direction on the pool and workpiece surfaces accounts for the enhanced image.
REFERENCES:
patent: 4225771 (1980-09-01), Justice et al.
patent: 4410787 (1983-10-01), Kremers et al.
patent: 4497996 (1985-02-01), Libby, Jr. et al.
Richardson, R. W. et al., "A Vision Based System for Arc Weld Pool Size Control", Measurement and Process Control for Batch Manufacturing, ed. D. E. Hardt, ASME, Nov. 1982, pp. 65-75.
Richardson, R. D. et al., "The Measurement of Two-Dimensional Arc Weld Pool Geometry by Image Analysis", Control of Manufacturing Processes and Robotics Systems, ASME, Nov. 1983, pp. 137-148.
Corby Jr. Nelson R.
Godwin Stanley J.
Campbell Donald R.
Davis Jr. James C.
General Electric Company
Shaw Clifford C.
Webb II Paul R.
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