1, the first is the force testing sensor of the
tensile testing machine, because the quality of the sensor determines the accuracy of the testing machine and the stability of the measuring force. At present, the small force value of the sensor for the tensile machine on the market generally uses the S-type sensor, and the value of the force is generally used. Spoke-type sensors, the inside of the sensor is generally resistance strain gauge type. If the accuracy of the strain gauge is not high or the anti-aging ability of the rubber used for fixing the strain gauge is not good or the material of the sensor is not good, the accuracy and service life of the sensor will be affected.
2, followed by the ball screw of the component 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 maximum deformation and elongation after the test. At present, some of the screw rods on the market use T-shaped ordinary screw rods, so that the gap is relatively large, and the second is that the friction force is relatively short and the service life is short. The screw used in Shijiazhuang Zhongshi Instrument Technology Co., Ltd. is high-precision in Germany. 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. 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 The synchronization of the transmission cannot be guaranteed to affect the test results. Shijiazhuang Zhongshi
tensile testing machine guarantees 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, the tensile testing machine on the market uses ordinary three-phase motor or variable frequency motor. This motor adopts analog signal control, the control response is slow, the positioning is not accurate, generally The speed regulation range is 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 control mode of the instrument is full digital pulse control, the speed range is wide, the control positioning is accurate, and the response is fast. Full-scale speed control is accurate and has a long service life of up to several decades without maintenance.
5. Finally, the measurement and control system (that is, software and hardware) of the
tensile testing machine. At present, most of the measurement and control systems on the market are controlled by 8-bit single-chip microcomputers, with low sampling rate and poor anti-interference ability. It is the AD converter if the number of bits of the AD converter is low. Then the measurement will not be accurate.
