The three basic performance of the connector automatic machine
Dec 15, 2022| The basic properties of the connector can be divided into three categories: machinery, electrical and environment.
1. As far as the mechanical performance is connected, the plug -in force is an important mechanical performance.
The plug -in force is divided into plug -in and pull -out power, the requirements of the two are different. The relevant standards stipulate the insertion power and separation force, indicating that the insertion force should be small, and the separation force should be too small, which will affect the reliability of the contact.
Another important mechanical performance is the mechanical life of the connector. Mechanical life is actually a durability indicator, which is called mechanical operation in national standard GB5095. Taking a period of plugging into one cycle at a time to determine whether the connector can complete the connection function normally after the specified plug -in cycle. The plug -in and mechanical life of the connector is related to the coating quality of the contact structure and the size and accuracy of the contact part.
2. The main electrical properties of the connector include contact resistance, insulation resistance and electrical strength.
High -quality electric connectors should have a low and stable contact resistance. The contact resistance of the connector ranges from several millions to dozens of millometer.
The insulation resistance measurement of the insulation and the insulation properties between the contact between the connector and the contact and the shell. The quantity ranges from hundreds of trillion to the Chimeter.
Electricity or pressure resistance, that is, medium tolerance, is the ability to characterize the rated test voltage between the connector contact components or between the contact component and the shell.
Other electrical performance. The frequency range of general testing is 100MHz ~ 10GHz. For radio frequency coaxial connectors, there are electrical indicators such as characteristic impedance, insertion loss, reflex coefficient, and voltage resident wavelet. Due to the development of digital technology, in order to connect and transmit high -speed digital pulse signals, a new type of connector appeared, namely a high -speed signal connector. Therefore, in terms of electrical performance, in addition to characteristic impedance, some new electrical indicators have also appeared, such as stagnation of stagnation.
3. The environmental performance of common environmental performance includes temperature resistance, humidity, vibration resistance, and impact resistance.
1. The higher operating temperature of the temperature-resistant connector is 200 ° C, and the lower operating temperature is -65 ° C. When the connector works, the current generates heat at the contact point and causes the temperature to rise. Therefore, it is generally believed that the working temperature should be equal to the sum of the temperature and contact point temperature. In some specifications, the allowable temperature rise of the connector under the rated operating current.
2. The invasion of moisture resistance will affect the insulation performance of the connector and rust metal parts. The condition of constant humidity and constant thermal test is 90%~ 95%of the relative humidity, and the temperature is+40 ± 20 ° C. The test time depending on the product, at least 96 hours. The alternative damp heat test is stricter.
3. When working in a wet and salt -containing environment, the surface treatment layer of the metal structure and contact components may produce electrochemical corrosion when working in a wet and salt -containing environment, which will affect the physical and electrical properties of the connector. In order to evaluate the ability of the electrical connector to bear this environment, salt fog tests are specified. It is made by suspending the connector in a temperature -controlled laboratory to form a salt mist atmosphere. The exposure time is at least 48 hours.
4. Anti -vibration and impact are an important performance of the electrical connector. It is an important indicator of the mechanical structure and electrical contact reliability of the electrical connector. It clearly specifies the relevant detection methods. The duration of peak acceleration and electrical continuity should be specified in the impact test.
5. Other environmental performance can be based on the requirements of the use, other environmentally friendly performance electrical connectors and sealing and low voltage.