Publish Time: 2022-05-31 Origin: Site
Insulated terminals as a connector, are an important component of the electrical industry. It plays an irreplaceable, non-negligible role because the engineering and technical personnel in the maintenance of the first also from the interface check, that is, the insulated terminals to start, so the terminal design is particularly important.
Here is the content:
The choice of materials
The design of the product structure
The choice of materials for insulated terminals directly affects the performance of the whole product and is the key to the design. For plastic material for example: if it is UL94, V-0 flame retardant as the design basis should be carefully reviewed each material physical properties of the table of technical parameters to meet the product standards, such as impact voltage and aging test can be over. The hardware material of insulated terminals is mainly TP pressure piece material selection is particularly important, because this pressure piece both meets a certain conductivity (current) and has a certain degree of flexibility.
The selection of materials for insulated terminals to our engineers brought difficulties, and precisely in this regard is the trend pursued by connector manufacturers in the elastic components. Many manufacturers of hardware materials are working hard in this area, the conductivity directly affects the temperature rise and contact resistance, the elasticity of the chemical elements with the material, the modulus of elasticity, hardness, tensile strength, the modulus of elasticity selected with the fourth strength theory of mechanics of materials Formula for calculation. The greater the conductivity of the material contact resistance is smaller the lower the temperature rise, plugging force and contact resistance into a quadratic curve relationship, contact resistance is the main factor affecting the life of the connector, should be given full attention. Figure out the cause-and-effect relationship for our choice of materials will have guidance, which is a prerequisite for insulated terminals design.
The design of the insulated terminal’s structure is also critical, which is entirely empirical aspects of things, no shortcuts. In this regard, each series has its characteristics, such as screw off, spliced products before and after the arc, long bit deformation, etc. The wall thickness is not uniformly caused by shrinkage deformation, etc. Screw off the following main types: three bars off, hoop mouth off, neck mouth off, stamping off, due to the impact of technical processes neck mouth. The above structure is achieved with the premise that the plastic material is PA66, where the need to explain the neck anti-drop, for example, the actual outer diameter of M3 screws is φ2.90mm, so the size of the shell neck should be designed in: φ2.5 to φ2.6, the thickness of the shell neck should be 0.4 to 0.5mm, and the screw. There should be a section under the head of the rod of insulated terminals smaller than the shell neck, to ensure that the screw can be smoothly screwed into the threads inside, in the production process should also do the corresponding adjustment.
When doing the design of the insulated terminals, you need to consider the choice of materials and the design of the structure. After continuous technical innovation, insulated terminals are widely used in all aspects of the industry, and the application of standards is also by the technical system and regulations. CHS terminal blocks are the ideal choice.