Welding process of movable cover plate and fixed cover plate of vacuum arc-extinguishing chamber

A technology of vacuum interrupter and welding process, applied in welding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of uneven thickness of nickel layer and quality fluctuation of vacuum interrupter, so as to reduce the cost of burning nickel and reduce Sewage treatment, the effect of improving production progress

Inactive Publication Date: 2013-12-25
浙江旭虹真空电器有限公司
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AI Technical Summary

Problems solved by technology

However, in the production process, stainless steel often needs to be plated with a nickel layer of about 10 microns by electroless plating and then burnt nickel before weldin

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0016] Concrete process of the present invention is as follows:

[0017] A. Degrease the static and dynamic cover plates of the vacuum interrupter made of stainless steel;

[0018] B. Put the treated dynamic and static cover plate of the vacuum interrupter into the electropolishing solution for 10-15 minutes of surface treatment, and then clean it;

[0019] The raw material weight ratio of electropolishing solution is:

[0020] Sulfuric acid 25-35 phosphoric acid 15-25 water 45-55;

[0021] C. Assemble the moving cover and the static cover to the vacuum interrupter respectively, and put solder in the welding seam and welding surface of the moving cover and the static cover;

[0022] D. Put it into a vacuum brazing furnace for brazing, and the heating steps are as follows:

[0023] 1) First raise the temperature in the furnace to 500°C, the heating time is 90-110 minutes, and keep warm for 25-35 minutes. During this period, the vacuum degree of the vacuum brazing furnace is ...

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Abstract

The invention provides a welding process of a movable cover plate and a fixed cover plate of a vacuum arc-extinguishing chamber. The welding process comprises the steps of A, carrying out deoiling treatment on the movable cover plate and the fixed cover plate; B, placing the movable cover plate and the fixed cover plate in an electropolishing solution for being subjected to surface treatment for 10-15 minutes, and then cleaning; C, placing welding flux at the welding seams and the welding surface of the movable cover plate and the fixed cover plate; D, loading the movable cover plate and the fixed cover plate into a vacuum brazing furnace for brazing; E, afterwards, dropping the temperature to 350-400 DEG C for pure nitrogen cooling or pure argon cooling, and tapping off until the temperature in the furnace is higher than the outside temperature for 15-25 DEG C. The welding process has the advantages that due to the adoption of a chemical electropolishing technology, quality fluctuation points are avoided, so that the cost of burning nickel is reduced, the sewage disposal is relieved, and the production progress is effectively improved.

Description

technical field [0001] The invention relates to the field of ceramic vacuum interrupters, in particular to a welding process for dynamic and static cover plates of vacuum interrupters. Background technique [0002] At present, when producing vacuum interrupters in China, the material of the dynamic and static cover plates has been replaced by stainless steel from the previous 4J33 Kovar material. However, in the production process, stainless steel often needs to be plated with a nickel layer of about 10 microns by electroless plating and then burnt nickel before welding. Fluctuations in the quality of the interrupter. Contents of the invention [0003] The purpose of the present invention is to change the material of the dynamic and static cover plate from the previous 4J33 kovar material to stainless steel when the current domestic vacuum interrupter is produced. However, in the production process, stainless steel often needs to be plated with a nickel layer of about ...

Claims

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Application Information

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IPC IPC(8): B23K1/008B23K1/20
Inventor 胡镇平史朝霞刘旺顺
Owner 浙江旭虹真空电器有限公司
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