How to improve the reliability of terminal blocks?
The reliability of terminal blocks is an important problem for the whole machine or system. This is because the terminal is used as a component in the whole machine or system, and its reliability directly affects or determines the reliability of the whole machine or system. The reliability of the terminal is related to its structural design, production process, production process, selected materials, quality control and its correct application. Among these factors, the structural design is the most important. It plays a decisive role in the inherent reliability of products. Therefore, special attention should be paid to how to improve and ensure the inherent reliability and operational reliability of the product in each stage of development and design, or in the reliability growth test.
In view of the contact failure forms exposed in the process of development, test and application of terminal blocks, some improvement measures are taken, and certain effects can be achieved. In structural design and application of auxiliary agents, these measures are summarized as follows: reinforcement method, calibration method, balance method, coating lubrication method and optimization method.
Reinforcement method
Reinforcement method refers to that under the condition that the electrical characteristics (such as VSWR and insertion loss) of the terminal block are not affected, the reinforcement measures such as adding reinforcing rib, no slotting or narrow slot are adopted to reinforce the outer conductor or inner conductor of the terminal block, so as to improve the rigidity and mechanical strength of the failure part and improve its contact reliability and mechanical life.
Calibration method
The calibration method, or alignment method, refers to shortening the insertion length of the pin and extending the axial length of the thread in the interface structure design of some micro and small terminal blocks, so that the thread on the connector plug and socket contact first, so that the pin and the socket are aligned in a straight line and then contact and connect, so as to avoid the pin from damaging the socket and socket during the connection process A measure that causes failure.
Balance method
The balance method refers to the structural design of high-frequency and low-frequency hybrid connector. The structural design of high-frequency contact should meet the requirements of electrical characteristics (such as voltage standing wave ratio) within the applicable frequency range, take into account the overall mechanical life of high-frequency and low-frequency, take balance measures to strengthen the strength of internal conductor system Jack as much as possible, and improve the inherent reliability of high-frequency contacts.
