Terminal line common fatal fault problem solving

From the point of view of use, the function that the terminal should achieve is: the contact part must be connected to the place where it should be connected, and the contact is reliable. Insulated parts that should not be conducted must be insulated reliably. The metal conductor inside the terminal is the core part of the terminal, which transmits the voltage, current or signal from the external wire or cable to the corresponding contact of the connector. Therefore, the contact must have excellent structure, stable and reliable contact retention and good conductivity. Due to unreasonable design of contact structure, incorrect material selection, unstable mold, out-of-tolerance processing size, rough surface, unreasonable surface treatment process such as heat treatment and electroplating, improper assembly, poor storage and use environment and improper operation, poor contact will be caused at the contact and matching parts of the contact. 2、 the problem of poor insulation. The function of the insulator is to keep the contacts in the correct position and arrange them, and to insulate the contacts from each other and from the housing. Therefore, the insulator must have excellent electrical performance, mechanical performance and process forming performance. In particular, with the widespread use of high-density, miniaturized terminals, the effective wall thickness of insulators is becoming thinner and thinner. This puts forward more stringent requirements for insulation materials, injection mold accuracy and molding process. Due to the existence of metal residues on the surface or inside the insulator, surface dust, flux and other pollution and dampness, organic material precipitates and harmful gas adsorption films fuse with the surface water film to form ionic conductive channels, moisture absorption, mildew growth, insulation material aging and other reasons, which will cause short circuit, leakage, breakdown, low insulation resistance and other poor insulation phenomena. The problem of poor fixation of 3、 is that the insulator not only plays an insulating role, but also provides precise alignment and protection for the extended contacts, and also has the functions of installation, positioning, locking and fixing on the equipment. If the fixation is not good, the light one will affect the contact reliability and cause instantaneous power failure, and the serious one is the product disintegration. Disassembly refers to the abnormal separation between plug and socket, pin and Jack caused by unreliable structure due to material, design, process and other reasons when the terminal is plugged in, which will cause serious consequences of interruption of power transmission and signal control of the control system. Due to unreliable design, wrong material selection, improper selection of molding process, poor quality of heat treatment, mold, assembly, welding and other processes, and inadequate assembly, poor fixation will be caused. In addition, poor appearance caused by coating peeling, corrosion, bruise, plastic shell flash, fracture, rough processing of contacts, deformation and other reasons, poor interchange caused by out-of-tolerance positioning and locking fit size, poor consistency of processing quality, excessive total separation force and other reasons are also common and frequently-occurring diseases. Generally, these faults can be found and eliminated in time during inspection and use.

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