With the development of the economy, the application of high and low temperature test chambers of electronic universal testing machines has gradually become more widespread. Electronic universal testing machines have software and hardware. Ball screws, motors, sensors, and transmission systems are important components of the testing machine.
First, software and hardware: The high-quality electronic universal testing machine uses a brand-name computer. The control system software is the Windows XP high and low temperature test chamber operating system platform. The high and low temperature test chamber has the characteristics of fast running speed, gentle interface, and simple operation, which can meet the needs of For test and measurement needs of different materials, physical property tests of various materials can be measured according to national standards, international standards or industry standards.
Second, the motor: The motor of the high-quality electronic universal testing machine adopts an AC servo speed control system. The AC servo motor under the Songgao and low-temperature test chamber has stable and reliable performance and has overcurrent, overvoltage, overload and other protection devices. There is also an electronic universal testing machine on the market that uses an ordinary three-phase motor or a variable frequency motor. This motor is controlled by analog signals. The control response is slow and the positioning is inaccurate. Generally, the speed adjustment range is narrow and there is no high speed or there is no low speed. There is no high speed and the speed control is inaccurate.
Third, high and low temperature test chamber ball screws: The screws currently used in electronic universal testing machines include ball screws and trapezoidal screws. Generally speaking, the gap of the trapezoidal screw is relatively large, the friction is relatively large, and the service life is short. At present, some manufacturers on the market will use trapezoidal screws instead of ball screws in order to save costs and obtain greater profits.
Fourth, transmission system: There are two main types of transmission parts of electronic universal testing machines. One is arc synchronous gear belt and precision screw pair transmission; the other is ordinary belt transmission. The first transmission method has smooth transmission, low noise, high transmission efficiency, high precision and long service life. The second transmission method cannot guarantee the synchronization of transmission, so the accuracy and smoothness are not as good as the first transmission system.
Fifth, sensor: The high and low temperature test chamber sensor is an important component for the accuracy of the testing machine and the stability of the force measurement of the high and low temperature test chamber. The types of electronic universal testing machine sensors currently on the market include S type and spoke type. The accuracy of the resistance strain gauge inside the sensor is not high, the glue used to fix the strain gauge has poor aging resistance, and the material of the sensor is not good, all of which will affect the accuracy of the sensor.
