As we all know, the function of the terminals is to connect the electricity. The metal pieces of the terminals are sewn into the insulating plastic, and there are jacks at both ends to facilitate the insertion of wires. However, in the use of terminals is not casual, sometimes you do not take care of the move is likely to become a fatal problem Oh, today to help everyone check the use of terminals will appear when those problems.
There are three common forms of fatal terminal problems:
Poor contact caused by a variety of complex reasons
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 contact member corresponding to the matching connector. Therefore, the contact parts must have excellent structure, stable and reliable contact retention force and good electrical conductivity. Due to the unreasonable structural design of the contact parts, the wrong selection of materials, the unstable mold, the out-of-tolerance processing size, the rough surface, the unreasonable surface treatment technology such as heat treatment and electroplating, the improper assembly, the bad storage and use environment and the improper operation, all of them will cause bad contact in the contact parts and matching parts.
wiring terminal insulation bad phenomenon
The function of the insulator is to keep the contact parts in the correct position, and make the contact parts and the contact parts, the contact parts and the shell each other insulation. Therefore, the insulating parts must have excellent electrical properties, mechanical properties and process forming performance. Especially with the wide use of high density and miniaturized terminals, the effective wall thickness of insulators is getting thinner and thinner. This puts forward more stringent requirements for insulating materials, injection mold precision and molding process. Due to the insulator surface or within the metal tailings, surface dust, flux, such as pollution of be affected with damp be affected with damp, organic material deposition and harmful gas adsorption film with surface water membrane fusion to form ionic conductive channel, absorption of moisture, mold, insulation material aging etc, can cause short circuit, leakage, breakdown, low insulation resistance insulation fault phenomenon.
Various reasons for the improper fixing of the terminal
Insulators not only serve as insulation, but usually provide precise alignment and protection for extended contacts, as well as the functions of mounting, positioning, and locking to the equipment. Improperly fixed, light influence contact reliability caused by instant power, serious is the product disintegration. Disintegration refers to the abnormal separation between the plug and socket, between the pin and the jack, which is caused by the unreliability of the structure of the connecting terminal in the plugging state due to the material, design, process and other reasons, which will cause the serious consequence of the interruption of the power transmission and signal control of the control system. Because the design is not reliable, material selection error, improper molding process selection, heat treatment, mold, assembly, welding and other process quality is poor, assembly is not in place and so on will cause poor fixation.
Bad appearance will cause a series of faults
In addition, the poor appearance caused by coating peeling, corrosion, bruising, plastic shell flicking, cracking, rough working of contact parts, deformation and other reasons, the poor interchange caused by positioning and locking fit size, poor processing quality consistency, total separation force is too large and other reasons, is also a common disease, frequently occurring. These kinds of faults can generally be detected and eliminated in time during inspection and use.
Post time: May-07-2021