Method and system for determining operating characteristics of a

Details Method and system for determining operating characteristics of a Method and system for determining operating characteristics of a

1993-09-07

1994-11-29

Shaw, Clifford C.

Electric heating

Metal heating

By arc

B23K 9095

Patent

active

053692438

ABSTRACT:
A system for locating a voltage sensitive parameter of an electric arc welding wire, which parameter is indicative of the welder perceived welding characteristics of said wire, said system comprises: means for feeding said wire toward a workpiece; means for applying a voltage between said wire and said workpiece whereby a welding arc is created between said wire and said workpiece to melt and deposit said wire onto said workpiece by a voltage sensitive arc welding procedure; means for gradually changing said applied voltage whereby said welding procedure shifts through a transfer region and between spray and globular welding; means detecting the actual voltage between the wire and workpiece as said applied voltage is changed; means for sensing each time when said actual voltage decreases below a selected threshold voltage; means for averaging the sensed number of times; means for detecting the applied voltage value when the averaged sensed number of times equals a selected number; and, means for selecting said selected number to have a value indicative of said welding procedure being in said transfer region.

REFERENCES:
patent: 5221825 (1993-06-01), Siewert et al.
Adam et al, "Sensing of GMAW Droplet Transfer Modes Using an ERIOOS-1 Electrode", Welding Research Supplement, Mar. 1990, pp. 1035-1085.
Liu et al, "Metal Transfer Mode In Gas Metal Arc Welding", ASM Reprint, May 1989, pp. 475-479.
Heald et al, "Droplet Transfer Modes for a Mil 1005-1 GMAW Electrode", NISTIR 3976, Oct. 1991, pp. 1-22.

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