Ultrasound wave and melt pole electrical arc compound welding method

Abstract

The invention provides a weld method compounding an ultrasonic and a gas metal arc welding so as to make use of the cavitation effect and the vibration effect of the ultrasonic to lead welding drops generated by the gas metal arc welding to be smoothly transmitted to a welding pool when the drops are still small. And when in welding, an electric arc shrinks under the effect of the ultrasonic and then the stiffness of the electric arc can be enhanced, which has a significant application value for welding of special positions such as a full-position welding, an overhead position welding, a flat position welding and a horizontal position welding, etc.. The invention includes the following steps: an ultrasonic generator is connected with an ultrasonic transducer 2 to convert ultrasonic energy into mechanical vibration; an ultrasonic transformer 3 enlarges amplitude; a conductive tip 5 is combined with the ultrasonic transformer; a protective gas nozzle 4 is fixed on the vibration node of the transformer; a welding wire 1 is connected with the conductive tip 5 to start a welding power supply 9 and then start an ultrasonic power supply after the electric arc becomes stable, then the transducer converts electrical energy into vibration and the ultrasonic transformer enlarges the ultrasonic amplitude which is transmitted to a melting electrode.

Description

technical field [0001] The invention relates to a welding method, in particular to a welding method combining ultrasonic waves and gas shielded metal welding, and belongs to the fields of metal arc welding, arc smelting technology and arc processing. technical background [0002] Metal arc welding includes gas metal arc welding, commonly known as gas metal arc welding, or "GMA" welding for short. Ordinary GMA welding uses metal welding wire as the electrode, which is the melting pole. In most cases the wire is fed in such a way that an arc is formed between the wire and the wood for welding. Sometimes due to the different components of the shielding gas, it can be divided into inert gas shielded welding, CO 2 Gas shielded welding, mixed gas shielded welding. [0003] GMA welding is widely used in the welding production of aluminum alloys, structural steels, low alloy steels, etc. When welding, a large current is passed into the thin wire. When thick wire and high current...

AI Technical Summary

Problems solved by technology

This method can effectively control the amount of metal spatter during welding, but due to the periodic interruption of the arc during the welding process, the normal GMA welding speed is affected, and the control system is quite complicated

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