Apparatus and methods for controlling a welding process

A method of controlling an arc welding process includes establishing an arc between a welding electrode and weld joint wherein light generated by the arc is reflected by the weld pool and by the metal surrounding the weld pool. The rays of reflected light travelling substantially parallel to the axi...

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Bibliographic Details
Main Author RICHARDSON; RICHARD W
Format Patent
LanguageEnglish
Published 29.10.1991
Subjects
CLADDING OR PLATING BY SOLDERING OR WELDING
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
SOLDERING OR UNSOLDERING
TRANSPORTING
WELDING
WORKING BY LASER BEAM
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Summary:A method of controlling an arc welding process includes establishing an arc between a welding electrode and weld joint wherein light generated by the arc is reflected by the weld pool and by the metal surrounding the weld pool. The rays of reflected light travelling substantially parallel to the axis of the electrode are collected in a video camera. The output of the video camera is fed to a monitor where an image of the weld pool is displayed in which the arc is obscured by the electrode and the arc process can be manually controlled on the basis of the image. In another method, the width of a weld pool is determined by analyzing a video image of the weld pool area.
Bibliography:Application Number: US19890349435