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Large trail long horizontal fillet sabuma - jia - ku welding process
Large trail long horizontal fillet sabuma - jia - ku welding process
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机译：large trail龙horizontal fillets A不骂 - 加 - 哭welding process
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摘要
PURPOSE:To realize an improvement of the welding efficiency, etc., by supplying two pieces of electrodes of a prescribed diameter range at a specific interval to a tip of the preceding electrode, and also, placing the succeeding electrode at a prescribed interval, and moreover, setting a ratio of both electrode currents to a specific range. CONSTITUTION:On a contact tip Lc of the preceding electrode, two pieces of electrode passing holes Sa, Sb are provided at an interval lL of 3.6mm, and an electrode of 1.2-2.0mmphi diameter in supplied to them, respectively. Also, the passing electrode sets an angle theta to a weld line, to 90 deg.+ or -30 deg., and also, an interval of the preceding and succeeding electrodes is controlled to 40-150mm. Moreover, a ratio of both the preceding and succeeding electrode currents is set to a range of 1.4-2.4 and tandem submerged arc welding is executed. According to this method, horizontal fillet welding of large leg can be performed by one pass, and by a dispersion of melting heat input, a good head is obtained. Accordingly, both the welding efficiency and the reliability of welding can be improved.
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