How should the performance of connectors be tested?
Release time:
2023-08-18
Connectors are devices that connect two active components. In practical applications, one may encounter issues such as connector failure or other faults. When faced with such problems, it prompts us to reflect on where the issue lies, which brings us to the topic of connector testing. If testing is done well, subsequent work can proceed smoothly, and such issues can be greatly avoided.
With the rapid development of smart devices, connectors are widely used in various devices. They are components that electronic engineers and technicians frequently encounter, serving as a bridge for communication in electronic circuits. They truly ensure the normal operation of all device functions. The forms and structures of connectors are diverse, varying according to application objects, frequency, power, application environment, etc. To improve reliability, the production process of connectors will ultimately undergo a quality inspection to ensure product quality.
Connectors consist of terminal housings and pin sockets, and are generally divided into pre-assembly and post-assembly inspections.
1. Pre-assembly inspection: The content of the pre-assembly inspection includes: material shortage, burrs, shrinkage, deformation, color difference, dirt, blockage, indentation, uneven/deformed baffles, raised locking points, sagging/tilted or broken parts, incorrect PIN markings/no PIN markings.
2. Post-assembly inspection: The content of the post-assembly inspection includes: checking for gaps between copper/iron shells and plastic shells, deformation of iron/copper shells, latches not pressed in place, tilting, damaged plastic shells, hooks not installed properly (inconsistent exposed dimensions of hooks at both ends), pressing the hooks a few times by hand to confirm whether the left and right hooks are normal and elastic.
Contact pressure inspection: The reliability of a connector, to a certain extent, depends on the contact pressure of its contact pairs. It is an important indicator that can directly affect the size of contact resistance and the wear of contact pairs. In most structures, directly measuring contact pressure is quite difficult. Therefore, it is often indirectly calculated through single-pin separation force. For circular pinhole contact pairs, a standard insertion pin with a specified weight is usually used to test the ability of the female contact to hold the weight. Generally, the diameter of the standard insertion pin is taken as the lower limit of the diameter of the male contact. The total separation force is usually twice the sum of the single-pin separation forces. When the total separation force exceeds 50N, manual insertion and removal become quite difficult. Of course, for some testing equipment or certain special requirements, zero insertion force connectors or automatically disconnecting connectors can be selected.
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