Metal stamping parts, hardware terminals, terminal blocks common failure forms
A, poor contact metal stamping parts, hardware terminals, terminal blocks within the metal conductor is the core of the terminal part, it will come from the external wires or cables voltage, current or signal to the corresponding contact element matching connector.
So the contact structure must have a good, stable and reliable contact retention and good electrical conductivity.
If contact structure design is unreasonable, material selection error, the mold is not stable, the processing size out-of-tolerance, rough surface, plating surface treatment such as heat treatment process is unreasonable, improper assembly, storage conditions and improper operation, will be in contact with a contact part of the cause poor contact and cooperate with the parts.
Second, the role of insulation fault insulators is keep contact is correct position arrangement, and make contact with the contact between, insulation between contact element and shell.
So the insulation parts must have excellent electrical performance, mechanical property and formability.
Especially with high density, miniaturization of the widespread use of terminals, the effective wall thickness is more and more thin insulator.
The insulation materials, precision injection mold and molding process, such as more stringent requirements are put forward.
If the insulator surface or the inner 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, the absorption of moisture, mold, insulation aging, can cause short circuit, leakage, breakdown, low insulation resistance insulation fault phenomenon.
Third, fixed bad bad, light person affect reliable contact cause instantaneous power, serious is the disintegration of products.
Refers to the disintegration of terminals in close state, due to the material, design, technology and so on reasons for structure between plug and socket caused by unreliable, abnormal separation between pin and socket, will cause control system and signal control in power transmission interrupted serious consequences.
If the design is not reliable, select material errors, incorrect molding process, heat treatment, mould, assembly, welding process of poor quality, such as fixed assembly does not reach the designated position, etc can cause adverse.
Metal stamping parts, hardware terminals, terminal blocks, because the coating peeling, corrosion, bruising, molded case flash, rupture, contact a rough machining, the deformation causes such as the appearance of the poor, due to the positioning lock tight fit size out-of-tolerance, consistency processing quality is poor, total separation force is too large to causes such as reversal, is also a common disease, frequently-occurring disease.
These faults are generally can timely find out in the process of inspection and use.
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