The ball screw, sensor, motor, software and hardware, and transmission system of the torsion testing machine are important components. These five factors play a decisive role in selecting a high-quality testing machine
1、 Ball screw. The current lead screws used in torsion testing machines include ball screw and trapezoidal lead screw. Generally speaking, trapezoidal lead screws have large clearance, high friction force, and short service life. Currently, some manufacturers in the market will use trapezoidal lead screws instead of ball screws to save costs and achieve greater profits
2、 Sensor. The sensor is an important part of the accuracy and force measuring stability of the torsion testing machine. At present, the types of torsion testing machine sensors on the market are S-type and spoke type. The sensor accuracy will be affected by the low accuracy of the internal resistance strain gauge, the poor aging resistance of the adhesive used to fix the strain gauge, and the poor sensor material
3、 Electric motor. The high-quality electronic universal testing machine adopts an AC servo speed control system, and the Panasonic AC servo motor has stable and reliable performance, with protective devices such as overcurrent, overvoltage, and overload. Currently, there is another type of electronic universal testing machine on the market that uses ordinary three-phase motors or variable frequency motors. This type of motor uses analog signal control, which has slow control response and inaccurate positioning. Generally, the speed range is narrow, and if there is high speed, there is no low speed, or if there is low speed, there is no high speed, And the speed control is not accurate
4、 Software and hardware. The high-quality torque testing machine adopts a brand computer, and the control system software is the XP operating system platform. It has the characteristics of fast running speed, mild interface, and simple operation, which can meet the testing and measurement needs of different materials. It can measure the physical performance tests of various materials according to national, international, or industry standards
5、 There are two main types of transmission systems for torsion testing machines: one is circular arc synchronous gear belt and precision screw pair transmission; The second is ordinary belt transmission