A stress relaxation test device and test method
A technology of stress relaxation and testing equipment, which is applied in the direction of measuring equipment, using stable bending force to test the strength of materials, instruments, etc., can solve the problems of high test sample, high equipment requirements, and long test period, so as to improve work efficiency, The data is accurate and reliable, and the effect of saving test costs
Active Publication Date: 2018-03-27
NINGBO XINGYE SHENGTAI GROUP +1
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Problems solved by technology
[0004] "Test Method for Tensile Stress Relaxation of Metal Materials" (GB / T 10120-2013) stipulates the preparation of tensile stress relaxation samples of metal materials, test procedures and test data, etc., which can only be used for tensile stress relaxation tests of materials , and cannot be used for the bending stress relaxation test of sheet strip products
Due to the lack of domestic stress relaxation test method standards, it cannot meet the stress relaxation test requirements under multi-component conditions. The cycle is long, the efficiency is low, and the requirements for the equipment are relatively high. The specified high-temperature ring bending stress relaxation test method has complicated equipment and cumbersome operation steps, and is not suitable for the bending stress relaxation performance test of actual products.
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[0022] see Figure 1 ~ Figure 3 , a kind of stress relaxation test device suitable for elastic materials disclosed by the present invention comprises a base 1, a slidable length positioning block 2 on the base 1, a through hole groove (not shown) in the middle of the length positioning block 2, and the base The screw holes (not shown) on 1 correspond to each other, and the length positioning block 2 is fixed on the base 1 through screws (not shown in the figure); Between them are positioned by keyways, and a threaded through hole (not shown) is provided on the side of the length positioning block 2, and the fixed block 3 is locked by screws; a step is set at the end of the base 1, and there is a slide rail in the middle of the step (not shown) , the height positioning block 4 is provided with a chute (not shown in the figure), and can be slid when installed on the slide rail. The positions corresponding to the chute and the slide rail are provided with through holes and thread...
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The invention relates to a stress relaxation testing device and testing method. The device comprises a base, wherein a length positioning block is arranged on the base, and a threaded through hole and a fixed block are arranged on one side of the length positioning block; a sliding rail is arranged on one end of the base, a height positioning block is arranged on the sliding rail, a baffle fixed hole is formed in the base and used for installing a baffle, a limiting plate is arranged on the other side of the base, and a micrometer head is arranged on the limiting plate. The testing method comprises the following steps: based on the equipment, firstly preparing a test sample, then calculating the test length and total deformation quantity, installing the test sample for testing according to the test length and the total deformation quantity, measuring permanent deformation quantity at different times, calculating the stress relaxation rate, and then drawing the curve of the stress relaxation rate. According to the stress relaxation testing device and testing method, the setting is simple and convenient, the operation is convenient, and the stress relaxation rate of elastic metal plates can be measured.
Description
technical field [0001] The invention relates to a stress relaxation test device and test method suitable for elastic alloy thin plates and strips such as copper alloys, aluminum alloys and titanium alloys. Background technique [0002] Stress relaxation refers to the phenomenon that the strain, deformation or displacement of a material remains unchanged under a certain temperature and a constrained load state, while the stress gradually decreases with time. [0003] When metal materials are under load for a long time, such as stretching, bending, compression and torsion, etc., the stress of the material will be relaxed, and the reliability and working life of the material will be affected. Stress relaxation occurs not only when elastic materials or components are in high temperature and high pressure service, but also in long-term service at room temperature. The ability of a material element to resist stress relaxation is called relaxation stability. The relaxation stabili...
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IPC IPC(8): G01N3/20
CPCG01N3/20G01N2203/0023
Inventor郑芸苑和锋陈文松彭丽军倪冠冠韦春霞宋守美胡文江吴小龙
OwnerNINGBO XINGYE SHENGTAI GROUP