Double-guide restriction type auxiliary clamping device for metal material compression test
A technology for compression testing and metal materials, which is applied in the direction of measuring devices, analyzing materials, and testing the strength of materials by applying stable tension/pressure. Material waste, large lateral force of guide rod and guide hole, etc., to achieve the effect of accurate and reliable test data, good coaxiality and stability, and guaranteed accuracy
Inactive Publication Date: 2021-07-13
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology
[0003] The main disadvantages of this guide device are: 1. During the test, the coaxiality between the guide rod and the sample cannot be accurately guaranteed because the guide rod and the guide hole are only matched by a single rail; 2. During the test, due to the instability of the sample, the The guide rod and guide hole of the device produce a large lateral force, which causes the device and the equipment pressure plate to slip, which will seriously affect the accuracy of the test data; 3. The test success rate is low, resulting in time, energy and test materials. Waste, there is a lot of room for improvement in test efficiency
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Embodiment 1
[0037] as attached Figure 4 And attached Figure 5 As shown, a batch of cylindrical metal samples (a total of 360 pieces, these 360 pieces of metal samples are processed in the same batch and exactly the same sample) are planned to be tested by compression test. Among them, 360 metal samples were divided into three test groups on average, and each group contained 120 metal samples, and the three test groups were room temperature test group, 0°C test group and -20°C test group. In each test group, 60 metal samples were tested by the device of the present invention, and another 60 metal samples were tested by the device recommended by GB / T7314-2017 as a comparative example. The success of the metal sample compression test is visually inspected to observe whether the metal sample is deformed and twisted during the test.
[0038] The statistics of the specific test results of the compression test are shown in the table below:
[0039] Sample diameter (mm) Test te...
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A double-guide restriction type auxiliary clamping device for a metal material compression test comprises an upper main body piece, a lower main body piece and a metal sample. The lower main body piece is of a cylindrical structure, an annular guide groove is formed in the upper surface of the lower main body piece in a downward vertical extending mode, and the guide groove and the lower main body piece are coaxially arranged; a circular-truncated-cone-shaped supporting table is formed in the center of the lower main body piece, and a lower reinforcing gasket is arranged on the supporting table. According to the double-guide restriction type auxiliary clamping device for the metal material compression test, through the arrangement of a double-guide-rail mutual restriction type structure, it can be well guaranteed that a guide structure in the clamping device and a metal sample are always coaxial in the test process, and instability of the metal sample is prevented; and the whole clamping device is prevented from sliding relative to the pressure plate of the testing machine, so that the accuracy of test data is ensured, and the test efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of mechanical performance testing of metal materials, in particular to a double-guided control type auxiliary clamping device for compression testing of metal materials. Background technique [0002] As we all know, the compression test of metal materials is used to evaluate the performance of metal materials under compressive load, and the instability of the sample in the compression test is a common phenomenon. At present, the compression test of metal materials in China is mainly carried out in accordance with the standard GB / T7314-2017 "Compression Test Method for Metal Materials at Room Temperature". The standard specifies two test methods, the first is to place the sample to be tested directly between the upper and lower pressure plates of the testing machine for testing; the second is to use a guiding device on the testing machine. The guide device recommended by the standard GB / T7314-2017 "Metallic ...
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IPC IPC(8): G01N3/04G01N3/08
CPCG01N3/04G01N3/08G01N2203/0003G01N2203/0019
Inventor 蔡海琛董明洪
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP