A centering device and centering method for tensile test of plate material
A technology of centering device and tensile test, applied in measuring devices, analytical materials, instruments, etc., can solve the problems affecting the accuracy of test results, reducing the efficiency of batch experiments, and the deviation of the center line of the sample, so as to improve the quality of pasting , the effect of expanding the scope of application and reducing errors
Active Publication Date: 2017-06-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
The method of manual visual centering and clamping takes a long time and the centering effect is not ideal. It is easy to cause the centerline of the sample to deviate from the centerline of the chuck of the testing machine, which affects the accuracy of the test results.
Although the method of setting an "L-shaped" limit mechanism at the clamping jaw of the collet and setting a sliding length on the clamping surface of the jaw can reduce the visual error introduced by manual visual clamping, the operation process is relatively cumbersome , increasing the experiment preparation time and reducing the efficiency of batch experiments
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[0029] A centering device and centering method proposed by the present invention for tensile testing of plate materials will be described in detail below with reference to the accompanying drawings.
[0030] Such as Figure 5 As shown, a centering device for a tensile test of a plate-shaped material includes a centering reinforcing sheet 1 and a pasting and pressing device. Such as Figure 4 As shown, the sticking and pressing device includes a support frame 6 and a pressing block 2. There is at least one pair of pressing blocks 2, preferably two pairs. Compression blocks 2 are installed in pairs on the support frame 6, and every pair of compression blocks 2 are correspondingly arranged up and down, and at least one compression block 2 in every pair of compression blocks 2 is movably installed on the support frame 6, and can also be two Each compression block 2 is movable. The pressing block 2 that is movably installed on the support frame 6 is installed on the support fram...
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The invention discloses a centering device and a centering method for a plate material tensile test. The centering device includes a centering reinforcing sheet and a pasting and pressing device. The sticking and pressing device includes a support frame and a pressing block, and the pressing blocks are installed in pairs on the supporting frame, and each pair of pressing blocks is arranged correspondingly up and down, and the pressing block is installed on the supporting frame through a slide block and a guide rail. V-shaped grooves are provided on the surface of the pressing blocks, and the V-shaped grooves of each pair of pressing blocks are opposite. One side of the centering reinforcement sheet is a semi-cylindrical protrusion, and the other side is provided with a groove with the same length as the cylindrical protrusion. The centering method includes the steps of applying glue, pasting, and pressing. The centering device and centering method of the present invention do not need to adjust the centering position through manual visual inspection and do not need to use a limit mechanism to assist centering. Efficiency of batch trials.
Description
technical field [0001] The invention belongs to the field of material mechanics testing, and mainly relates to a centering method and a device for a sample in a material mechanical performance test, in particular to a centering device and a centering method for a plate material tensile test. Background technique [0002] The tensile test of materials is one of the basic methods to obtain the mechanical properties of materials. The mechanical performance indicators such as elastic modulus, tensile strength, yield strength and proportional limit of the material can be obtained through the tensile test. The quality of neutrality between the sample and the chuck of the testing machine directly affects the accuracy of the test results. [0003] The samples of material tensile test mainly have two forms: plate shape and round bar shape. Before the test, the form of the sample should be determined according to the test requirements of the material. [0004] In the prior art, most...
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IPC IPC(8): G01N3/02
Inventor 高希光宋迎东于国强
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS