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What should be paid attention to when installing fixtures in tensile testing machine

Release time:2022-10-27 source:Jinan Hengsi Shanda Instrument Co., Ltd. Browse:

Tension testing machine is a multi-function tension machine that has been widely used in machinery, electronics, universities and other industries. With the development of technology, it is being used more and more widely. In order to ensure the effect of everyone during use, the editor of Full-Strength Test will tell you the things you need to pay attention to when installing fixtures for tensile testing machines.
Fixtures are an indispensable part of the tensile test machine. The tensile test machine clamps the sample through the fixture, uses the force device, the force value display device and the recording to determine whether the material is qualified and meets the predetermined performance indicators. Without available fixtures, these cannot be judged. Fixtures are a part of the tensile tester that changes frequently according to the changes in the material sample. Different materials require different fixtures. Fixtures are an important factor in whether the test can be carried out smoothly and the accuracy of the test results. Since the tensile tester can measure the performance of a variety of products, the specialty of the fixture structure is formed due to the different structures and appearances of various samples. Therefore, the reasonable and correct use of the clip is conducive to the smooth progress of the test.


Some requirements for fixture installation in practical applications of tensile testing machines:
1. Correct clamping of the sample is very important for the test and directly affects the success or failure of the test and the accuracy of the test data;
2. For rectangular samples and brittle samples, clamping is more important;
3. When clamping, install the sample in parallel as far as possible, and then stretch it after parallel;
4. In steel wire winding fixtures, the wire cannot be pressed, which will cause local stress concentration and will often break from the compressed line, causing breakpoint spread;
5. For wedge-shaped fixtures, the left and right centering of the sample is guaranteed by the fixtures, but it is easy to install inclined front and back. After installing inclined, the pressure on both sides of the sample is uneven during the stretching process, which may tear the sample or break point spread;
6. For overlap samples, the overlapping surface should pass through the force action center of the sensor.

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