There are three common forms of fatal failure of terminal connecting wires

From the point of view of use, the function of the terminal connecting wire is that the contact part must be conductive and the contact is reliable. Insulated parts that should not be conducted must be insulated reliably. There are three common fatal fault forms of terminal connecting wire: 1. Poor contact The metal conductor inside the terminal connecting wire is the core part of the terminal, which transmits the voltage, current or signal from the external wire or cable to the contact corresponding to its matching 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. poor insulation The function of the insulator is to keep the contacts in the correct alignment 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 terminal connections, the effective wall thickness of the insulator 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. Insulators with poorly fixed 3. not only play an insulating role, but also provide accurate alignment and protection for extended contacts, and also have the functions of installation, positioning, locking and fixing on 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 the plug and the socket and between the pin and the Jack caused by the unreliable structure due to the material, design, process and other reasons when the terminal connecting wire is plugged in, which will cause the serious consequences of the interruption of the 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. Poor, due to positioning and locking fit size out of tolerance, poor consistency of processing quality, excessive total separation force and other reasons caused by poor interchange, is also a common disease, frequently-occurring disease. Generally, these faults can be found and eliminated in time during inspection and use.

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