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With the Electromagnetic relay development, the detection technology of relay is more advanced. At the same time, users are also increasingly high requirements on... quality, performance and reliability of relay. This requires very precise relay detection, in order to ensure the quality and reliability of relay production. The combination of the analog and digital electronic technology and computer technology, completing automatic detection of the relevant parameters on voltage electromagnetic relay is the development direction of electromagnetic relay detection. This paper mainly introduces the main function and work principle of voltage electromagnetic relay detection system based on industrial computer as the core. The miniature relay parameter test instrument is developed and the rate of qualified products is count. The product quality is improved, and it has the advantages of convenient operation and high accuracy rate. The system is suitable for small and medium- sized enterprises voltage electromagnetic relay factory test, it provides a powerful reference for the development of automatic detection system.

Mold failure usually starts from the surface. The mold life expectancy can be effectively extended by improving the surface properties and performance of the mold. Laser cladding technology is a new type of materials processing and surface modification technology. Because the advantages of cladding surface abrasion resistance, corrosion resistance, anti-oxidation and base metal metallurgy combination, so widely used. In this paper, 45 steel surfaces are treated by laser cladding using the LWS-500 laser welding. The cladding material is nickel- based alloy powder TiC ceramic particles. Through the observation of microstructure of the cladding layer and measuring the micro-hardness, it analyzes the influence of Ni/TiC ratio on the cladding structure and microstructure hardness of the layer. Results show that the Ni60+20%TiC alloy powder for laser cladding can get the best quality of cladding layer. Deformation of the base metal is very small. It has a large number of applications in engineering practice currently. To improve the quality and the service life of the die has great economic benefit and social benefit.