How to prevent poor fixing of terminal

1. Interchangeability check

The interchangeability check is a dynamic check. It requires that the matching plugs and sockets of the same series can be mated and connected to each other, and it can be found whether there is any failure to fit, locate and lock due to the out-of-dimension of insulators, contacts and other parts, missing parts or improper assembly. , And even cause disintegration under the action of rotating force. Another function of the interchangeability check is to detect in time whether there is any metal excess that affects the insulation performance through the plug-in connection of the thread, the bayonet, and the like. Therefore, 100 percent of the wiring terminals for some important purposes should be checked for this item to avoid such major fatal failure accidents.

2. Torque check

Torque inspection is a very effective inspection method for assessing the reliability of the wiring terminal structure. For example, the U.S. military standard MIL-L-39012 standard stipulates. According to the standard, samples should be sampled and tested for torque resistance in each batch to find problems in time.

3. General test of crimping wire

In electrical installation, it is often found that individual core crimped wires cannot be sent in place, or cannot be locked after being sent in place, and the contact is unreliable. The analysis reason is that there are burrs or dirt stuck on the threads of individual mounting holes. Especially when using the last few mounting holes that the factory has installed on a plug socket, if the defect is found, the crimping wires of the other holes that have been installed have to be unloaded one by one, and the plug socket is replaced. In addition, due to the improper selection of the wire diameter and the crimping aperture, or the error of the crimping process, it will also cause the crimping end to be weak. For this reason, the manufacturer must conduct a thorough test on all the mounting holes of the delivered plug (seat) sample before the finished product leaves the factory, that is, use the loading and unloading tool to simulate the wire crimped with the pin or socket to check whether it can be Locked. According to the product technical conditions, check the pull-off force of each crimped wire.