Method for stirring welding pool in process of welding and electromagnetic pendulum device

Abstract

The invention relates to the welding processing field, disclosing a method for stirring a welding pool in the process of welding and an electromagnetic pendulum device. The method comprises the following steps: the electromagnetic pendulum device is installed at the position of a welding gun; after a electromagnetic coil power supply of the electromagnetic pendulum device is connected, the magnetic field with a certain direction is generated around a magnetic rod, under the action of the magnetic field, the electric arc generated by the welding gun oscillates and stirs the welding pool to ensure the evenness of metal impurities. The electromagnetic pendulum device comprises the electromagnetic coil, the magnetic rod and a magnetic pendulum shield; wherein, the electromagnetic coil winds the periphery of the magnetic rod, and the magnetic pendulum shield is arranged outside the electromagnetic coil. The method in the invention improves the uniformity of hardness of work pieces and ensures the quality of the surfacing layers on the surfaces of the work pieces, thus ensuring the qualification rate of repaired work pieces.

Description

Technical field [0001] The invention relates to the field of welding processing, in particular to a method and a device for stirring a weld pool in welding. Background technique [0002] In welding, due to the non-uniformity of metal impurities in the welding pool, the surface hardness of the welding workpiece is often uneven, which seriously affects the quality of the workpiece. In welding, the repair requirements of the roll are especially high. [0003] As a key spare part of the rolling mill, the roll is consumed very large in the steel rolling process, and the surfacing technology is an important manufacturing and maintenance method in the machinery manufacturing industry. When the roll is used to the scrap limit, the wear resistance of the roll is enhanced by repairing, and the service life of the roll is prolonged. The roll repaired by surfacing welding has the advantages of low cost, long service life, and good use effect, which has obvious effects on promoting circular e...

AI Technical Summary

Problems solved by technology

[0008] Roll surfacing is relatively strict on the uniformity of hardness of the surfacing layer. If the surfacing hardness uniformity is not good, it is easy to cause local cracking or falling off of the surfacing layer of the roll during the rolling process; and the poor hardness uniformity of the surfacing will affect Metal structure of surfacing layer

Due to the uneven metal impurities in the molten pool of the roll surfacing, the surface metal impurities formed after the molten pool is cooled and solidified are uneven, which also causes the surface hardness of the workpiece to be uneven, which seriously affects the quality of the surfacing layer on the roll surface.

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