Welding method for gas-magnetic combined control double-tungsten-electrode TOPTIG

Abstract

The invention discloses a welding method for a gas-magnetic combined control double-tungsten-electrode TOPTIG. The welding method comprises the following steps of 1, fixing a work piece to be welded on a welding fixture; 2, setting the welding parameters, specifically the welding current is 50-200 A, the welding speed is 120-400 mm / min, the wire feeding speed is 50-900 mm / min, the included anglesof a welding wire and tungsten electrodes are both 15 DEG-30 DEG, and the air flow of an inner hole of the hollow tungsten electrode is 5-15 L / min; and 3, starting a controlling switch, firstly aerating shielding gas, energizing an electromagnetic coil, then sequentially performing arcing of the ordinary tungsten electrode and the hollow tungsten electrode, controlling the two arcs to be coupled to reduce air blow between the two tungsten electrodes by adjusting the air flow of the inner hole of the hollow tungsten electrode and changing the intensity of the access current of the electromagnetic coil 2.0 to 3.0 s after igniting arcs, feeding the welding wire in highest temperature region under the arc action, and moving a welding torch along the welding line for the welding of the work piece. By means of the welding method, double-tungsten-electrode arc coupling is adopted for welding, so that the arc heat is increased, the welding wire melts more quickly, the welding rate is improved,and the high speed and high efficiency welding is achieved.

Description

technical field [0001] The invention relates to a welding method, in particular to a gas-magnetic combined control double tungsten pole TOPTIG welding welding method. Background technique [0002] For a long time, argon tungsten arc welding has a stable welding process and good welding quality, and has been widely used in actual welding production. However, this method has obvious defects: the single-pass welding seam has shallow penetration, low deposition rate and no Suitable for thick plate welding. TOPTIG welding is a new type of robotic TIG wire filling process. Its key part is the welding gun integrated with the wire feeding system. It has the advantages of good accessibility of the welding gun, fast deposition rate and welding speed. Only about 30% of the arc heat is used to melt the wire, resulting in a slower welding rate. TOPTIG welding wire can be accurately fed into the highest heat area in the arc, which improves the deposition rate and welding efficiency. ...

AI Technical Summary

Problems solved by technology

[0002] For a long time, argon tungsten arc welding has a stable welding process and good welding quality, and has been widely used in actual welding production. However, this method has obvious defects: the single-pass welding seam has shallow penetration, low deposition rate and no Suitable for thick plate welding

[0003] However, due to the limited current-carrying capacity of TIG welding tungsten electrodes, the maximum welding current that can be used during welding is small. Even when multiple arc coupling welding is used, due to arc divergence, low energy density, arc blowing and other phenomena exist , still results in a small TOPTIG welding heat input, and less heat for melting the welding wire, thus affecting the welding efficiency of TOPTIG welding

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