Electromagnetic stirring magnetic head of double-wire submerged arc welding machine

Abstract

The invention relates to an electromagnetic stirring magnetic head of a double-wire submerged arc welding machine, which is provided with a framework and a field coil winding wrapped on the framework, wherein a magnetic core made of a soft magnetic material is arranged in the framework, the longitudinal displacement of the magnetic core can be regulated without dependence on the field coil winding; the longitudinal section of the coil winding, along the welding direction, is shaped as a cone, and the size of the cross section in the vertical welding direction is smaller than that in the welding direction; the framework is installed on the peripheries of a flux flattening cavity, a flux delivering channel, a chucking mechanism of a flux delivering device; and the magnetic core is arranged in the middle of two welding pistols of the double-wire submerged arc welding machine and above double-wire submerged arc welding co-welding pool. By virtue of the invention, the size of the stirring magnetic head can be reduced; the welding pool below the magnetic core can be evenly stirred because the magnetic core can be closer to the welding pool; the welding line structure and the welding line toughness can be improved through affecting the heat dissipation of a welding line and the flow in the pool; and the influence of magnetic field on a welding arc and a magnetic environment on magnetic field distribution can be reduced, and the stability of a welding process and an electromagnetic stirring process can be enhanced.

Description

technical field [0001] The invention relates to welding equipment, in particular to an electromagnetic stirring magnetic head of a double-wire submerged arc welding machine capable of realizing double-wire tandem eutectic pool welding. It belongs to the field of machinery manufacturing. Background technique [0002] At present, twin-wire tandem eutectic pool submerged arc welding is widely used in the welding production of large steel structures, and has the advantages of high welding efficiency and good weld quality. [0003] When welding the twin-wire submerged arc welding machine that can realize twin-wire serial eutectic pool welding, its two welding torches are placed back and forth along the welding direction, and the distance between the welding torches is relatively close to form a common molten pool. Flat cavity, so that the flux can form a better protection to the arc, and the flux feeding channel and the clamping mechanism of the flux feeding device are set in th...

AI Technical Summary

Problems solved by technology

If the existing coaxial coil form is directly placed on the periphery of the double welding torch during twin-wire tandem eutectic pool double-wire submerged arc welding, the volume of the stirring head will be huge, the magnetic field energy will diverge, and the magnetic induction intensity and distribution produced by it cannot be achieved. Fully stir the weld pool, therefore, it is difficult to obtain an ideal electromagnetic stirring effect

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