High-deposition-rate gas shield welding nozzle

Abstract

The invention relates to a high-deposition-rate gas shield welding nozzle, and belongs to the technical field of welding. The gas shield welding nozzle is composed of a nozzle, a welding wire guide pipe, a multi-tooth welding wire clamping base, a multi-tooth welding wire clamp and a flow divider. During assembly, a guide pipe body of the welding wire guide pipe penetrates through a central welding wire guide pipe hole of the nozzle in the mode that a pipe shoulder is limited to the front end face of a nozzle inner cylinder; the multi-tooth welding wire clamp is embedded into a center through hole in the mode that the outer sides of elastic clamp teeth abut against the inner wall of a conical cavity of the multi-tooth welding wire clamping base; and the external threads of the flow divider are screwed with the threads of the nozzle inner cylinder, and the front end of the multi-tooth welding wire clamp base abuts against the pipe shoulder of the nozzle by pressing the multi-tooth welding wire clamp. By adopting the high-deposition-rate gas shield welding nozzle, the electric contact point position of a welding wire is effectively guaranteed, the wear resistance of the welding wire guide pipe is improved, and the inner diameter of the welding wire guide pipe is prevented from being abraded; and moreover, abrasion can be effectively compensated, the height of a welding wire electrifying point is increased, the preheating length of the welding wire is increased, and the deposition rate of the welding wire is increased.

Description

technical field [0001] The invention relates to a welding tip for metal gas shielded welding, in particular to a high deposition rate gas shielded welding tip, which belongs to the field of welding technology. Background technique [0002] In the process of gas metal shielded welding, an arc is generated between the continuously fed welding wire and the workpiece to be welded, so that the front end of the welding wire melts to form a droplet and transitions to the molten pool, and the molten pool cools and solidifies to form a weld. In the traditional gas shielded welding tip structure, the part used to guide the welding wire and transfer the current to the welding wire is the contact tip, which is generally hollow and made of brass, red copper or chrome-zirconium copper. For the smooth conduction of the welding wire, the inner diameter of the contact tip is usually slightly larger than the wire diameter of the welding wire. When the welding wire passes through the contact t...

AI Technical Summary

Problems solved by technology

However, because the welding wire used in gas shielded welding has a certain warp and loose diameter, the contact position with the contact tip will change during the welding process. Rotating the unworn position of the contact tip to the worn position cannot ensure that the welding wire and The contact point of the contact tip is still stable at the same position, so there is a possibility that the worn part of the contact tip will continue to wear. In fact, the purpose of reducing the frequency of contact tip replacement cannot be achieved.

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