Industry News

Selection of Materials and Structure Design of Terminals


In the electrical equipment industry, terminal blocks are an important component of their own and play a very important role in development. Usually, when the engineering information technology management personnel carry out analysis and maintenance operations, they first start with the interface inspection, that is, the terminal, so the design of the terminal is particularly important. 

The design of the terminal includes not only material selection, structural design, but also the production process, in which product standards are the most important guiding ideology, and almost all considerations are based on this. In other words, when doing structural design, we need to design according to product standards. 

First of all, the choice of materials will be directly related to the overall performance of the terminal, which is the key to the entire design. For example, take plastic materials as an example: if the design is based on the flame retardancy of UL94 and V-0, it is necessary to carefully check whether the technical parameters of each material performance table meet the product standards, such as whether the impulse voltage resistance and aging resistance tests have passed. In terms of hardware materials, the choice of TP filming materials is particularly important.

This is because when choosing this material, it is necessary to meet the requirements of electrical conductivity on the one hand, and the requirements of the manufacturing process on the other hand. Conductivity directly affects the temperature rise and contact resistance of the terminals. The elasticity of the terminal depends on the chemical elements, elastic modulus, hardness and tensile strength of the material, and the elastic modulus is calculated by the fourth strength theory formula of material mechanics.

Therefore, in the design of the terminal, a reasonable material must be selected. At the same time, the structural design of the product is also very important. However, this is a matter of experience and there are no shortcuts. In this regard, each series has its own characteristics, such as: preventing screws from falling off, bending the front and back sides of spliced products, deformation of long fingers, and shrinkage deformation caused by uneven wall thickness. 

 In the work of teaching design in the actual situation, the development requirements of all aspects of the terminal block also need to be adjusted continuously to ensure that the enterprise products can meet the requirements of use in terms of structure.