PCB insertion and extraction force detection

　　The reason for the inspection is that there are burrs or dirt stuck at the screw teeth of a few installation holes. Especially when using the last few installation holes that have already been connected to a plug-in terminal plug socket by the factory, if the defect is found, the crimping wires of the other holes that have already been installed must be removed one by one and the plug socket replaced. In addition, due to improper matching of wire diameter and crimping aperture, or due to incorrect crimping process operation, it can also cause accidents of unstable crimping ends. For this reason, the production factory needs to conduct a test on all installation holes of the delivered plug (socket) samples before the finished product leaves the factory, that is, use loading and unloading tools to simulate the wires with crimped pins or sockets and send them in place to check whether they can be locked. According to the product technical specifications, check the pulling force of each crimped wire.

　　By screening the reliability of terminal blocks, various failure modes and mechanisms can be identified, which can lead to a large number of lessons learned and eliminate various hidden dangers, providing scientific basis for improving design, process, inspection, and use. It is also an important basis for revising and formulating technical conditions for terminal blocks.

　　Without reliable electrical connections, there can be no reliable system engineering. Failure and reliability are two aspects of a contradictory entity that correspond and are interrelated.