Welding gun for rotating arc gas metal arc welding

Abstract

The invention discloses a welding gun for rotating arc gas metal arc welding. The welding gun comprises a welding gun outer barrel, wherein the welding gun outer barrel is internally provided with an eccentric assembly, the eccentric assembly comprises an upper inner barrel, a lower inner barrel and an eccentric slide block adjustment mechanism, the welding gun also comprises a hollow rotation shaft arranged on the eccentric assembly, when the upper inner barrel and the lower inner barrel rotate, the hollow rotation shaft does eccentric revolution surrounding the axle line of the upper inner barrel and the lower inner barrel, and does reversed rotation surrounding the self axle line at the same time, the front end of the hollow rotation shaft is connected with an electric conduction nozzle, the rear end of the hollow rotation shaft is connected with an electric conduction disc, during the welding, the electric current flows into the electric conduction disc through a flexible cable from an end cover, then reaches the electric conduction nozzle through the hollow rotation shaft, and is conducted onto a welding wire, a rotating arc generated along with the rotation of the hollow shaft and the electric conduction nozzle. The flexible cable can stably conducting electricity in a fixing manner, and the problem of stable electric conduction between a rotating part (the hollow rotation shaft) and a fixing part (welding cable) is solved. The welding gun disclosed by the invention can be used for a variety of positions welding such as flat position welding, over-head position welding, vertical position welding and horizontal position welding, and the appearance of a welded joint is good and in a clear fish-scale pattern shape.

Description

Technical field [0001] The invention relates to a gas shielded welding torch, in particular to a rotating arc melting electrode gas shielded welding torch. Background technique [0002] MIG welding has the advantages of high productivity, low welding cost, and wide application range. It is widely used in the welding of carbon steel and alloy steel. Rotary arc welding is that the welding arc rotates with a certain radius and frequency while moving along the welding direction. Its advantages are: ①For butt joints, rotary arc welding is beneficial to the penetration of the two side walls of the groove and also makes the melting wider Increase, improve the bridging ability, and improve the quality of the weld; ②For fillet and lap joints, rotary arc welding is beneficial to obtain concave welds, improve the quality of the weld, and reduce the stress concentration of the fillet joints; ③The rotary arc has The stirring effect of the molten pool can refine the weld grains and improve th...

AI Technical Summary

Problems solved by technology

② The eccentric mechanism is complex, using insulating and heat-resistant materials, affected by the high temperature of welding, it is easy to deform and fail, and the cost is high

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