Wear parameters must be considered in the connector design process, because wear will directly affect the overall service life of the connector, and strict tests must be carried out to ensure that the connector can meet the requirements and specifications. In this paper, shallow view connector manufacturers mainly share with you that connector wear is the key to the degradation of contact normal force!
Wear is a factor that indirectly leads to the degradation of connector performance. If the wear of connector contact surface exposes the contact bottom metal, it will directly introduce additional corrosion sources at the contact interface and affect the contact normal force of the connector. The loss of contact normal force is an indirect connector degradation mechanism, because it increases the possibility of contact interface fretting during the service life of the connector.
Fretting will lead to fretting corrosion of tinned connectors and fretting wear in noble finished product systems. In both cases, the loss of contact normal force will lead to increased sensitivity to fretting, resulting in corrosion related degradation and a related increase in contact resistance.
Simply put, the contact normal force of the connector is generated by the deflection of the socket contact beam when the plug contact is inserted into the socket, because the contact force will be generated during the fitting process of the connector. However, due to the incorrect alignment of the connector during the fitting process, excessive stress in the contact beam may occur during the fitting process of the connector.
Although many connectors have anti overstress functions, such as alignment function or beam stop, to reduce the possibility of contact force reduction due to permanent deformation. However, in the case of a two beam contact system, if the connectors are not paired correctly, the increase in the gap between the two beams will prove this permanent deformation. Especially when the connector is re inserted, the over stressed beam will reduce the contact force.
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