Changxing Mingwang Rubber & Plastic Technologies Co.,Ltd. , https://www.cxmingwang.com
Steel Strand Relaxation Tester Technical Features
1, structural framework
As the strand relaxation test belongs to a long-term load test, the usual test time is more than 100 hours. In the long test process, the whole test machine is under stress, if the test machine itself If the strength is not enough, the relaxation phenomenon of the tester itself will easily occur, and the final result of the test will be affected.
The main body of the strand relaxation tester adopts the main frame with twice the maximum test force, which greatly increases the stability of the relaxation test and effectively reduces the test error caused by the structural frame. The transmission adopts a planetary reducer and a self-locking worm and worm gear structure. Ball screw without gap, compact and efficient.
2. Force measuring system
Similarly, the strength of the force sensor also determines the strength of its resistance to loosening; whether it can maintain the stability and accuracy of the measurement during the prolonged relaxation test has become a top priority. Domestic sensors are difficult to achieve very good results.
The China Steel Strand Relaxation Tester uses a high-stability, high-precision American-made load cell, which has high strength and good stability, and greatly reduces the relative error of the test force during the long-term relaxation test.
3, control and transmission system
The choice of servo motor directly determines the efficiency of the drive system during the slack test, the size of the noise, and the stability of the drive. Adopting Panasonic's all-digital AC servo motor, its excellent performance ensures high efficiency, low noise, and smooth transmission.
4, deformation sensor
Since the deformation of the sample is maintained, the stress of the measurement sample decays with time. Taking into account the low relaxation characteristics of the steel strand, the accuracy and stability of the deformation sensor have a great influence on the test results. A successful 100-hour relaxation test is directly related to whether the deformation sensor is stable and reliable.
The steel strand relaxation tester uses a grating digital deformation measurement sensor to fundamentally avoid the influence of zero drift and temperature drift of the sensor on the measurement result (other types of sensors such as resistive, capacitive, inductive, etc. Can not do this). This guarantees the stability of the measurement during long tests.
5, fixture
The selection of the fixture can directly affect the firmness of the clamping and the convenience of the test.
The strand relaxation tester adopts an extended three-leaf wedge-shaped fixture, which is more firmly clamped; together with a special release paste, it is easy to loosen after the test, so as to provide convenience.