Technical guidance for purchasing and testing the

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Technical guidance for purchasing electronic universal testing machine

the positive materials and negative materials of the company are first supplied to the downstream battery manufacturers. The electronic universal testing machine can do tensile, compression, bending, peeling/tearing and other functions

1 model selection: first, determine the maximum force value to be tested. The maximum force value is below 5kn. Generally, single column electronic tensile testing machine is selected

desk top electronic universal material testing machine with double columns is generally selected when it is greater than 5kn to 50kN

floor type electronic universal material testing machine is selected when it is greater than 50kN The rack shall be designed in combination with ergonomics to ensure safety, reduce operator fatigue and provide the highest level of flexibility, which are inseparable from the use of new materials

2 fuselage speed and height selection: understand the test space required for the test The beam displacement and vertical test space required by the test, 898mm beam displacement and 1067mm vertical test space are generally sufficient If it is an elastomer test, the beam displacement and vertical test space will be higher Therefore, there should be ultra - wide or ultra - high racks to meet the needs of different customers

3 selection of load sensor: whether the load measurement accuracy meets or exceeds the standards of astm4 and iso7500/1 The load sensor shall also consider: range, accuracy, repeatability, offset loading error, nonlinearity, stability compensation range, temperature zero drift and sensitivity The automatic identification, calibration and zero adjustment of load sensor greatly speeds up the test process and ensures the consistency and accuracy of data In addition, please consider the availability of self identification before starting the test to prevent personnel from making mistakes. The full range regulator eliminates the need for the operator to manually adjust the range

4 selection of strain measurement: any mechanical system will be deformed, no matter how slight, by the force of developing lightweight automobile products. The same applies to material testing systems. The frame, load sensor and fixture of your system are not infinitely rigid and will be slightly deformed when the force is applied to the specimen. This deformation is called flexibility and can cause serious errors in test results, especially in high load tests with small stroke requirements Therefore, all racks must include very strong beam guide rails in the design of notch bottom smooth gauge, providing the highest level of beam stiffness, high stiffness load sensors and fixtures, so as to ensure the maximum accuracy of test results When it is required to measure the deformation of specimen very accurately, the use of extensometer can completely avoid the system flexibility error

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