Ultra-narrow gap arc welding device for sending and setting flux sheet chain

Abstract

The invention discloses an ultra-narrow gap electric arc welding device with flux piece feeding chains. The ultra-narrow gap electric arc welding device is composed of a flux piece conveying device and an ultra-narrow gap welding gun. The welding gun is composed of a welding gun handle (3), a supporting body (6), a plate-shaped electric conducting rod (5), an insulation material, a guide wire pipe (7), an electric conducting nozzle (11), a high-temperature-resisting leaf spring (10) and a ceramic pressing block (9). A flux piece conveying pipe (19) is arranged in the flux piece conveying device, and the two flux piece chains combined through relative dislocation of high-temperature-resisting elastic ropes (23) can be pushed into the root of a groove automatically in the direction of a weld bead through the flux piece conveying device. A welding wire (1) is fed into the groove through the welding gun and penetrates the part between the two flux piece chains, lateral force is applied to a flux piece (15) under the elastic deformation of the high-temperature-resisting elastic ropes (23) on the flux piece chains, the flux piece (15) is in tight contact with a side wall, and the relative position between the flux piece (15) and an electric arc is accurately maintained.

Description

Technical field [0001] The invention belongs to the field of welding technology, in particular to an ultra-narrow gap arc welding device for feeding flux sheet chains. Background technique [0002] The groove gap of conventional narrow-gap welding is generally between 10 and 20mm. Because of its small weld cross-sectional area, low heat input, small residual deformation, good joint performance, and high welding efficiency, it is widely used in thick plate welding. In recent years, ultra-narrow gap welding with a gap below 5mm has been developed. The minimum heat input can reach 0.5KJ / mm, and the width of the heat affected zone is only 1~2mm. Compared with narrow gap welding technology, ultra-narrow gap welding saves costs and improves production efficiency. Especially in the welding structure of medium and thick plates, ultra-narrow gap welding has obvious advantages, and the amount of welding wire during welding is only 30% of the conventional narrow gap welding technology. Ho...

AI Technical Summary

Problems solved by technology

The existing problem is that when cleaning the welding slag, it is easy to cause damage and fall off of the remaining flux, which will affect the welding of the next weld.

The existing problem is that the feeding amount and position of the flux strip are easily changed during the welding process, and the arc cannot be effectively restrained, which affects the stability of the welding arc.

The problem is that the middle part of the steel mesh is exposed, and the arc first contacts the steel mesh to conduct electricity during welding. If there is a part of the steel mesh attached to the side wall that is not coated with flux, the steel mesh will form a charged channel with the side wall. , causing the arc to rise here

And this flux belt is pre-set, not suitable for welding thick plates and long welds

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