Tensile tester and its clamping device

Abstract

The invention relates to a tension tester and a clamping device thereof. The clamping device includes: a first clamping assembly including a first end and a second end; a second clamping assembly including a third end and a fourth end, the third end is rotatably connected to the first end, and the fourth end The second end can be opened by the principle of magnetic homopolar repulsion to place the object to be clamped between the fourth end and the second end, and the fourth end and the second end can be clamped by the principle of magnetic heteropolar attraction , to clamp the object to be clamped between the fourth end and the second end. The above-mentioned clamping device is opened by the principle of magnetic homopolar repulsion, and clamped by the principle of magnetic heteropolar attraction, thus having an automatic clamping function. Compared with the clamping device controlled by the pneumatic valve, the above-mentioned clamping device has the characteristics of light weight, and can be applied to small and medium range sensors and small range sensors. Moreover, compared with the screw manual clamping device, the above-mentioned clamping device has the characteristics of simple operation, high testing efficiency and long service life.

Description

technical field [0001] The invention relates to the technical field of tensile testing equipment, in particular to a tensile testing instrument and a clamping device thereof. Background technique [0002] The tension tester usually includes a connected tension sensor and a clamping device, and the clamping device connects the object under test and the tension sensor, so that the object under test can be tested for tension. Among them, the nominal range of the tension sensor ranges from 10N-1KN. According to the size of the nominal range, the tension sensor can be divided into a large range sensor of 100N-1KN, a small and medium range sensor of 10N-100N, and a small range of 10N and below. sensor. [0003] And the actual measuring range of the tension sensor = the nominal measuring range - the weight of the clamping device. This requires that the weight of the clamping device has as little effect on the actual range of the tension sensor as possible, let alone exceed the no...

AI Technical Summary

Problems solved by technology

[0004] However, for the operator using the screw manual clamping device, each time the clamping and loosening of the measurement needs to be manually rotated many times, the operation is troublesome and affects the efficiency of the test; If the clamping device is tightened, it will generate a horizontal one-way force on the clamping device, and the sensor will be damaged if it is subjected to a torque force exceeding the range.

For sensors with a small range of 10N and below, it is easy to cause artificial damage

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