Development of Automatic Fillet Welding Process with High Speed Rotating Arc

概要

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The high speed rotating arc process originally developed for NGW-MAG welding process has significant advantages, such as decentralization of penetration to ensure sufficient fusion to side walls and formation of concave bead profile. An ex amination carried out for horizontal fillet welding by this process has proved that the high speed rotating arc process is also suit able for horizontal fillet welding. The rotation of arc acts on the weld pool to prevent undercut and hanging bead which are liable to be formed in the conventional welding method. Higher rotation speed produces a flat bead surface in addition to the above-mentioned effect. This feature enables a higher welding speed operation at small leg length size. Another advantage is in the increase of wire melting rate resulting from centrifugal force action in high speed rotation. Precision and real time automatic seam tracking by arc sensor control has been also developed in this welding process. Lateral guidance is achieved by detection of arc voltage waveform at every cycle of arc rotation. Torch height guidance is achieved by detection of welding current. This arc sensor control system has been applied with satisfactory result to tandem two electrodes-welding.
社団法人溶接学会の論文
1987-10-01