Gun body structure of plasma surfacing welding gun

Abstract

The invention provides a gun body structure of a plasma surfacing welding gun and belongs to the technical field of plasma surfacing welding. According to the gun body structure of the plasma surfacing welding gun, the technical problems that the prior welding gun is low in surfacing welding accuracy and bad in surfacing welding effect can be solved. The the gun body structure of the plasma surfacing welding gun comprises a gun body which is arranged axially, a plasma gas channel which is located at the center of the gun body, a protecting gas channel, a cooling water channel and a powder channel. The plasma gas channel penetrates into the gun body from the outer surface of the gun body and penetrates out of the gun body from the front end of the gun body; the cooling water channel penetrates into the gun body from the the outer surface of the gun body, passes the front end of the gun body and penetrates out of the gun body from the outer surface of the gun body; the powder channel penetrates into the gun body from the rear end of the gun body and penetrates out of the gun body from the front end of the gun body. The the gun body structure of the plasma surfacing welding gun is small in whole volume, simple and compact in structure and low in production cost; meanwhile, the plasma gas channel, the protecting gas channel, the cooling water channel and the powder channel are distributed on the gun body uniformly, so that the interior structure of the gun body is optimized and the surfacing welding accuracy of the welding gun is improved.

Description

technical field [0001] The invention belongs to the technical field of plasma surfacing welding, and relates to a torch body structure of a plasma surfacing welding torch. Background technique [0002] Plasma powder surfacing uses the plasma arc as the heat source. The high temperature generated by the plasma arc is used to rapidly heat the alloy powder and the surface of the substrate and melt, mix, diffuse, and solidify together. After the plasma beam leaves, it is self-excited and cooled to form a layer of high-performance alloy. Layer, so as to realize the strengthening and hardening of the surface of the parts, which is widely used in petroleum, chemical, engineering machinery, mining machinery and other industries. [0003] Plasma surfacing welding torch is the equipment commonly used in the plasma surfacing welding technology, and traditional plasma arc welding torch, for example authorized announcement number is a kind of novel small inner hole plasma powder surfacin...

AI Technical Summary

Problems solved by technology

[0003] Plasma surfacing welding torch is the equipment commonly used in the plasma surfacing welding technology, and traditional plasma arc welding torch, for example authorized announcement number is a kind of novel small inner hole plasma powder surfacing welding torch disclosed by the utility model of CN 203484793 U, and it comprises upper gun body, The insulator and the lower gun body are wrapped and cast by the extended die-casting gun body. The lower end of the lower gun body is equipped with a nozzle and a gas shield; There are water-cooling channels, annular powder channels, and annular gas channels arranged in sequence from inside to outside; the upper part of the lower gun body is equipped with powder tube channels, water inlet channels, water outlet channels and gas channels; although this welding torch structure can achieve small inner holes Plasma powder surfacing welding, but there are the following technical problems at the same time, 1. The overall volume of the welding torch is large and the structure is relatively loose, which increases the cost on the one hand, and reduces the surfacing accuracy of the welding torch on the other hand; 2. The cooling water channel is located in the The periphery of the lower torch body does not extend to the nozzle, resulting in the inability to effectively cool the nozzle when it is working, which will easily lead to excessive temperature of the nozzle, thus affecting the surfacing effect of the welding torch

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