A Surface Treatment Method for Improving the Connecting Performance of Electrical Explosive Devices
A technology of surface treatment and electro-technical products, which is applied in the field of surface treatment of aerospace electro-technical products that have special requirements for plugging performance, and in the field of electroplating of sealing parts for electro-technical products, which can solve the problem that is not conducive to the mass production of sealing parts , not suitable for surface treatment, poor versatility, etc., to achieve the effect of saving raw materials, promoting uniform nucleation, and bright surface
Inactive Publication Date: 2020-07-14
中国兵器工业第二一三研究所
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[0007] b. This method has poor versatility. The traditional electroplating method is mainly suitable for the surface treatment of ordinary electro-explosive products, and is not suitable for the surface treatment of electro-explosive devices with high requirements on the plug-in life.
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[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.
[0027] There are two aspects to be considered to improve the plugging life of the sealing parts of electrical pyrotechnics. Generally, the higher the hardness of the surface coating of the pins at the plugging end, the better its wear resistance, the longer the plugging life of the sealing parts, and the higher the reliability. , so the first consideration is to increase the hardness of the gold-plated layer on the surface of the contact pin of the sealing part. At present, in the market, alloying elements are added to the electroplating solution to form an alloy coating to increase the hardness of the gold coating. This is feasible for general electrical pyrotechnics seals that do not require high electrical performance, but seals that require high electrical performance (...
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The invention provides a surface treatment method for improving the plugging performance of electrical explosive products. The surface treatment process of ultrasonic finishing is adopted. Due to the introduction of ultrasonic waves, the temperature of the strong acid solution is low and the treatment time is short, which is not only difficult to cause over-corrosion of the substrate , and can deoxidize the surface of the pin of the seal, improve the surface finish of the substrate, and have the functions of removing burrs, and can level the tiny defects on the surface of the pin. Then wash it repeatedly with deionized water to completely remove the residue on the surface of the pin without introducing impurity ions, so as to ensure the uniform nucleation of metal Au+ on the electrode surface during the subsequent electroplating process, and slow down the grain growth rate. The binding force between the plating layer and the substrate is improved, and the surface of the obtained electroplated gold layer is bright and dense, which ensures the insertion performance of the connector.
Description
technical field [0001] The invention relates to the field of electroplating of sealing parts for electro-technical products, in particular to the technical field of surface treatment in which electro-technical products for aerospace have special requirements on plugging performance. Background technique [0002] Glass-metal seals (referred to as seals) refer to a connecting body formed by sintering special glass powder, pre-oxidized metal shells and pins at 600-1000°C under the protection of nitrogen atmosphere. Sealing parts are widely used in weapons, aerospace, aviation, ships, oil blasting and other fields, among which electrical explosives are one of its important application fields. [0003] As a key component of the electrical explosive device, the sealing piece plays the role of support and connection. The quality of the electroplating coating on the plug-in terminal (especially the contact pin) directly affects the safety and reliability of pyrotechnics. Therefore...
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IPC IPC(8): C25D3/48C25D5/34
CPCC25D3/48C25D5/34
Inventor 杨欣王海震祝捷程加奇姜鹏涛杨云龙
Owner 中国兵器工业第二一三研究所