Welding method for plasma cutting electrode

Abstract

The invention relates to a welding method for a plasma cutting electrode. The welding method comprises the following steps of 1, respectively obtaining a section of silver alloy and a section of copper alloy through processing; 2, forming an assembling hole in the axial end face of the copper alloy, arranging a bulge on the axial end face of the silver alloy, and pressing the bulge on the silver alloy into the assembling hole in the copper alloy by an interference pressing match mode, thus fixedly integrating the copper alloy and the silver alloy to obtain a blank for welding; and 3, fixing one end of the blank for welding on a high-energy-beam welding clamp, and performing welding in a welding gap between the copper alloy and the silver alloy by a high-energy-beam welding mode. According to the welding method, the combination firmness after the copper alloy and the silver alloy are welded is high, and the performance of a product is improved.

Description

technical field [0001] The invention relates to the technical field of plasma electrodes, in particular to a welding method for plasma cutting electrodes. Background technique [0002] The plasma electrode made of copper will generate heat during use. Excessive heat will cause the electrode to be consumed quickly. Therefore, there are electrodes made of silver on the market. On the one hand, silver has better conductivity, so that the electrode body and the emitting metal The contact resistance between them is relatively low, and the reflectivity of the silver electrode is high, which can reflect excess radiant heat. This can greatly improve the life of the electrode. [0003] However, the price of silver material is very high, so silver electrodes cannot be widely used on electrodes. When the electrode is actually used, only the head heats up more, and the rear part has an internal cooling device, so it is not necessary to use an all-silver structure to solve the problem ...

AI Technical Summary

Problems solved by technology

[0008] Since friction welding is two metals that rotate in opposite directions with each other, the high heat generated by friction is used to fix the two metals together. Friction welding has high requirements on the metal surface, high requirements on the straightness and center alignment of the equipment, and the welding A lot of flash waste material will be generated in the process

In addition, due to the defects of the friction welding process itself, the product will have a certain rate of failure, and the junction of the two metals will have a certain rate of false welding in the radial direction, and the plasma electrode has strict sealing requirements during use ( An axial hole will be processed on the electrode body 2 made of copper, and cooling water will be passed into the hole to cool the electrode when the electrode is working), and weak welding will cause the cooling water to leak or even the electrode head to fall off, causing a short circuit or even burning serious consequences of guns

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