A method for manufacturing an electrode assembly for an automotive metal halide lamp

Abstract

The invention relates to a production method of an electrode component for an automotive metal halide lamp. A tungsten wire tool is used for clamping a tungsten wire to be processed; a molybdenum chip fixture is used for fixing a molybdenum chip to be processed; and after the position, to be processed, of the tungsten wire is precisely controlled, a laser generated by a laser generator is output through a laser emitting head to perform the welding connection for the tungsten wire and the molybdenum chip. Compared with the prior art, a product, produced by the production method, has the advantages of good welding consistency, quality guarantee and large improvement of welding efficiency.

Description

Technical field [0001] The present invention relates to a method for manufacturing an electrode assembly, in particular to a method for manufacturing an electrode assembly for automobile metal halide lamps. Background technique [0002] The welding of tungsten wire electrodes in automobile metal halide lamps has always been the traditional electrode resistance welding. This technology uses upper and lower tungsten electrode discharge welding, that is, the tungsten wire and the molybdenum sheet are pressed between the two electrodes, and a current is applied. A method of heating the workpiece to a molten or plastic state by the resistance heating effect generated by the contact surface of the workpiece and the adjacent area to form a metal bond. Due to the influence of many factors, it is difficult to guarantee the quality of the products after welding, and the consistency of welding strength is very poor, which has the following shortcomings: [0003] (1) The contact surface of th...

AI Technical Summary

Problems solved by technology

Due to the influence of various factors, it is difficult to guarantee the quality of the welded product, and the consistency of the welding strength is very poor, and there are the following disadvantages:

[0003] (1) The contact surface of the welding electrode is large, and the tungsten wire is extremely thin (0.25mm in diameter), so that the position of the weldment cannot be guaranteed, resulting in unstable welding strength

[0004] (2) The surface of the electrode is uneven due to discharge, which requires a lot of manual grinding work

And useless electrodes will cause pollution after being discarded

[0005] (3) After the subsequent hydrogen burning treatment, the solder joints will fall off

[0006] (4) During welding, since the tungsten wire is extremely thin and the molybdenum sheet material is extremely thin, the extrusion of the upper and lower electrodes will cause the deformation of the product

[0007] (5) Changes in welding energy, resulting in brittle products and over-welding

[0008] (6) The welding time of a single product is long and the labor efficiency is low

Because the tungsten wire electrode is extremely thin, the molybdenum sheet material is extremely thin, and the welding size requirements are high, the quality of welding cannot be guaranteed by using simple fixtures.

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