Several important factors that determine the performance and accuracy of the tensile testing machine:

1.        The first is the force value sensor of the tension machine. Because the quality of the sensor determines the accuracy and stability of the test machine. At present, the small force value of the sensor for the tensile machine on the market generally uses the S-type sensor, and the large value is generally spoke type. The sensor, the inside of the sensor is generally a strain gauge. If the accuracy of the strain gauge is not high or the rubber used for fixing the strain gauge is not good enough, or the material of the sensor is not good, the accuracy and service life of the sensor will be affected. The imported sensor used by Hengyi is the world's famous sensor manufacturer, the United States, which has high precision, good linearity and stable performance. It will not change for decades.

2.        The second is the ball screw that drives the movement of the sensor. If the screw has a gap, the test data made in the future will directly respond to the large deformation and elongation after the test. At present, the screw on the market has a T-shaped ordinary screw, so that the gap is relatively large, and the second is that the friction is relatively short and the service life is short. The screw used by Hengyi Company is high-precision The gapless ball screw has a surface hardening hardness of HRC58-62 and a service life of several decades. And ensure that the accuracy is unchanged.

3.        Once again, it is the transmission system of the tension machine. At present, some of the tension machine transmission systems on the market use reducers, and some use ordinary belts. The main drawbacks of these two transmission methods are: the former requires regular lubrication, and the latter cannot be guaranteed. The synchronism of the drive affects the test results. Hengyi's tensile machine drive system adopts full arc synchronous belt deceleration to ensure the synchronous precision of the transmission, high transmission precision, high efficiency, stable transmission, low noise, and long service life without maintenance.

4.        Again, the power source (motor) of the tension machine is also called the motor. At present, some tensile machines on the market use ordinary three-phase motors or variable frequency motors. This type of motor uses analog signal control, which has slow control response and inaccurate positioning. narrow

There is no high speed at high speed or low speed, and there is no high speed, and the speed control is not accurate. The motor used by Hengyi Company is the Japanese Panasonic full digital AC servo motor. The control mode is full digital pulse control, and the speed range is wide.

Up to 0.001-1000MM/MIN, accurate control positioning, fast response, 0.01 seconds can be added to full speed, the motor can ensure full-scale speed control accuracy, and long service life, up to several decades, and no maintenance.

5.        After the zui is the measurement and control system (that is, software and hardware) of the rally machine. At present, the measurement and control system of most rally machines on the market adopts 8-bit single-chip microcomputer control, the sampling rate is low, and the anti-interference ability is poor, and the other is the AD converter.

If the number of bits in the AD converter is also low resolution. Then the measurement will not be accurate. Hengyi's measurement and control system adopts the controller developed by world's advanced 32-bit ARM technology. Hytest V6.0. This controller is based on 32-bit ARM platform and runs the time-duplex multi-tasking operating system developed by the company. Smooth and the system is more stable. The sampling rate can reach 200 times per second. With the addition of 24-bit high-precision low-noise high-speed AD converter, the whole measurement and control system has higher precision and high stability control. The software of the upper computer is Hengyi Company. The all-digital three-bi-ring control software developed over two years has two control modes: 1. PID control adjustment mode 2. Modular lake control adjustment method (the first in the industry). The whole test process can achieve constant force value control, constant displacement control, constant deformation control, low frequency fatigue control, and arbitrary control of the program.