Method and apparatus for arc welding

Electric heating – Metal heating – By arc

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21912434, 219137R, B23K 912

Patent

active

042490618

ABSTRACT:
A process for adjusting a welding torch with respect to a weld joint formed between two workpieces is disclosed, including determining operating quantities for arcs located in at least two positions relative to said weld joint, deriving characteristic values for each of those operating quantities, mathematically combining such characteristic values, and comparing the mathematical combination with a theoretically calculated value for such characteristic values, and then adjusting the position of the welding torch in accordance with the difference between the mathematical combination of those characteristic values and their theoretically calculated value.
An apparatus for effecting such welding torch adjustment is also disclosed, including means for adjusting the welding torch relative to the weld joint, means for producing welding arcs between the welding torch and at least two locations with respect to the weld joint, means for determining characteristic values corresponding to operating quantities of the welding arcs, computer means for mathematically combining those characteristic values, means for comparing the mathematical combination of the characteristic values with a theoretically calculated value for the combination of those characteristic values, in order to produce an output signal corresponding to the difference between those values, and means for controlling the means for adjusting the torch relative to the weld joint in response to that output signal.

REFERENCES:
patent: 2920183 (1960-01-01), Greene
patent: 3204081 (1965-08-01), Iceland
patent: 3346807 (1967-10-01), Wood et al.
patent: 3484667 (1969-12-01), Wofsey
patent: 4151395 (1979-04-01), Kushner et al.

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