What are the methods for detecting a poorly contacted PIN pin jack?
With the development of science and technology, electronic equipment is becoming more and more complex, the performance requirements are getting higher and higher, and the requirements for the electronic components used in them are becoming more and more stringent. The performance and reliability of the connector directly affect the performance and reliability of electronic equipment. This makes the structural design, manufacturing process, assembly and other process links of electrical connectors more technically difficult, and the unreliable factors increase, and become more complex. Therefore, it is more and more important to study the reliability maintenance and testing methods of connectors.
The connector is generally the connection between the PIN pin connector and the pin jack contact, we know that the pins or terminals of the components generally have a layer of plating, such as lead-tin alloy, pure tin plating, nickel plating, silver plating, silver-plated palladium alloy, gold plating, and so on. So the contact between the components is actually the contact between these plated metals. Of course, the conductivity of different coated metals is different, and the corresponding contact resistance is also different. Generally, the conductivity of gold is better, followed by silver. In the welding process, because welding is actually the process of forming an alloy, and the alloy itself is a good conductor, the reliability of the welding itself is relatively high, unless it is a poor welding. However, the connection between connectors depends on the contact between surfaces, so it is easy to cause poor contact. Then, for the method of detecting poor contact of pin jacks, the next is introduced by Jingcheng Xiaobian for you:
1. Instantaneous detection of PIN pin jack:
Some connectors are used in dynamic vibration environments. Experiments have proved that only checking whether the static contact resistance is qualified cannot guarantee the reliable use of contact in dynamic environments. Because the connectors with qualified contact resistance often still have instantaneous power-off phenomena when performing vibration, shock and other simulated environment tests, it is good to conduct 100% dynamic vibration tests to assess the contact reliability of some connectors with high reliability requirements.
2. PIN pin jack single-hole separation force detection:
Single-hole separation force refers to the separation force of the mated contact from rest to motion, which is used to characterize that the pin and jack are in contact. The experimental results show that the separation force of a single hole is too small, which may cause signal transient interruption when subjected to vibration and shock load. It is more effective to check the contact reliability by measuring the separation force of a single hole than to measure the contact resistance. If the inspection finds that the single-hole separation force is out of tolerance, the contact resistance measurement is often still acceptable. To this end, in addition to the flexible mating contact stable and reliable contact parts to be developed and developed, the manufacturer should not use the automatic plugging force testing machine for key models to measure at multiple points, and should carry out 100% point-by-point single-hole separation force inspection of the finished product to prevent signal transient interruption caused by individual jack relaxation.
3. PIN pin jack conduction detection:
At present, there is no such item in the product acceptance test of the general high-current connector manufacturer, and the user generally needs to carry out the conduction test after installation. Therefore, it is recommended that manufacturers should increase 100% point-by-point conduction testing for some key models of products.
