Electric heating – Metal heating – By arc
Patent
1997-03-14
2000-07-04
Shaw, Clifford C.
Electric heating
Metal heating
By arc
B23K 9095
Patent
active
060842059
ABSTRACT:
Method and system for producing high quality welds in welding processes, in general, and gas tungsten arc (GTA) welding, in particular by controlling weld penetration. Light emitted from a weld pool is collected from the backside of a workpiece by optical means during welding and transmitted to a digital video camera for further processing, after the emitted light is first passed through a short wavelength pass filter to remove infrared radiation. By filtering out the infrared component of the light emitted from the backside weld pool image, the present invention provides for the accurate determination of the weld pool boundary. Data from the digital camera is fed to an imaging board which focuses on a 100.times.100 pixel portion of the image. The board performs a thresholding operation and provides this information to a digital signal processor to compute the backside weld pool dimensions and area. This information is used by a control system, in a dynamic feedback mode, to automatically adjust appropriate parameters of a welding system, such as the welding current, to control weld penetration and thus, create a uniform weld bead and high quality weld.
REFERENCES:
patent: 3299250 (1967-01-01), Vilkas et al.
patent: 3335254 (1967-08-01), Vilkas et al.
patent: 3370151 (1968-02-01), Normando
patent: 3627972 (1971-12-01), Iceland
patent: 4477712 (1984-10-01), Lillquist
patent: 4484059 (1984-11-01), Lillquist
patent: 4594497 (1986-06-01), Takahashi et al.
patent: 4611111 (1986-09-01), Baheti
patent: 4737614 (1988-04-01), Richardson
patent: 4767911 (1988-08-01), Maram
patent: 4831233 (1989-05-01), Gordon
patent: 4975558 (1990-12-01), Lukens et al.
patent: 5275327 (1994-01-01), Watkins et al.
patent: 5435478 (1995-07-01), Wood et al.
patent: 5475198 (1995-12-01), Burke et al.
patent: 5481085 (1996-01-01), Kovacevic et al.
Renzi Ronald F.
Schroder Kevin
Sheaffer Donald A.
Tung David M.
Evans Timothy
Olsen Kurt
Sandia Corporation
Shaw Clifford C.
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