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Factors Affecting the Accuracy of Tensile Testing Machines

Factors Affecting the Accuracy of Tensile Testing Machines

Tensile testing machine is used to test the tensile, compression, bending, shearing, peeling, tearing and other properties of metal or non-metallic materials. Only with good measurement accuracy can the tensile testing machine accurately measure various physical properties of materials. The main factors affecting the accuracy of tensile testing machine are motor, transmission system, fixture, sensor, measurement and control system, etc.

The motor of the tensile testing machine is the power source. Our company adopts AC servo motor, which has fast response and accurate speed control. The test speed ranges from 0.001mm/min to 500mm/min, and the service life is long and the maintenance cost is low.

The transmission system of the tensile testing machine mainly adopts a reducer or a belt, which needs to be lubricated regularly to ensure the good transmission synchronization of the tensile testing machine.

The fixture of the tensile testing machine needs to be selected according to the material to be tested to ensure that the sample will not slide in the jaws during the test, and the fractured part of the sample will not be at the clamped part.

The sensor of the tensile testing machine is used to test the tensile force, compression force, bending force, shear force, tear force, peel force, etc. that the sample can withstand. It is necessary to select the force value sensor of the corresponding range according to the force value that the material can bear, so as to ensure the accuracy of the measured force value. Generally speaking, the S-type sensor is used when the force is small, and the spoke sensor is selected when the force is high.

The measurement and control system of the tensile testing machine is used to collect the force value, displacement and deformation of the sample during the test, record the test time, and calculate the test result. The operation speed, control accuracy and sampling rate of the measurement and control system directly affect the display accuracy of the sample results.

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