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双语推荐：复合铆钉

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介绍了国产三复合铆钉型触点自动机工作原理及设计特点。该机是一种自行设计的新型三复合冷压自动焊机,其制打产品的规格覆盖面广、质量稳定,适用于绝大多数的三复合铆钉的生产。各项性能指标已达到同类冷压焊机的国际先进水平,扩大了三复合铆钉的适应面。
The working principle and design features of the domestic automatic machine for trimetal rivets were introduced.The machine is China ’s first self-designed new type cold automatic welding machine,whose performance has reached international level of similar machine.In addition,the development helps China to fill the gaps in manufacturing cold pressure welding automatic machine for trimetal rivets.

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裂纹是影响电触点使用寿命的主要原因之一，本文对AgSnO2/Cu复合铆钉触点的常见裂纹进行了归纳分析。从裂纹产生的部位来看，复合铆钉触点中的裂纹主要有两类，一类产生于AgSnO2触点层，其起源主要是Ag与SnO2颗粒界面；另一类产生于AgSnO2与Cu的界面，其起源一是结合界面本身，二是AgSnO2触点层裂纹扩展至界面而成。两类裂纹均缩短触点使用寿命，但AgSnO2/Cu界面裂纹危害更大。改善Ag与SnO2颗粒的高温润湿性和提高AgSnO2/Cu界面结合强度是改善复合铆钉触点性能的重要途径。
Some common causes of cracking, which is one of the primary defects influencing the life of AgSnO2/Cu bimetal layered rivets, are analyzed in this paper. According to the cracking location, two kinds of cracks are found in bimetal rivets. One is formed in the AgSnO2 layer and usually originated from the interface between Ag and SnO2 particles. The other one is formed in the interface between AgSnO2 and Cu. The second one may be originated in the interface itself, or be the propagation in the interface of the cracks originating from the AgSnO2 layer. The second kind of cracks is more harmful, even though both cracks decrease the life of rivets. In order to improve the properties of AgSnO2/Cu bimetal rivets, it is important to increase the wetta-bility between Ag and SnO2 particle at elevated temperature and the bonding strength between of AgSnO2/Cu interface.

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磁保持继电器是智能电表的核心部件之一,应具有高的可靠性、安全性及抗短路电流能力。本文针对智能电表用磁保持继电器的常见失效原因进行了分析。结果表明,触头表面污染引起磁保持继电器熔焊失效;复合铆钉触头开裂导致磁保持继电器熔焊失效或断开失效;在进行短路载流能力试验时,不合理的磁保持继电器结构引发爆炸;中间位置导致磁保持继电器出现断开失效。
Magnetic latching relay is one of the core components of smart ammeters, and it is required to have high reliability,security and short-circuit current carrying capacity. The factors which are often seen causing the failure of magnetic latching relays are analyzed in this paper. Results show that contamination on the contact surface of magnetic latching relays may cause a welding failure. Cracks in bimetal contacts may cause the contacts unable to close or welding failure. Unreasonable structure of magnetic latching relays may cause an explosion during the test for short-circuit current carrying capacity. The occurrence of the neutral position may lead to operation failure.

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