Centering device and method used for sheet-shaped material tensile test

Abstract

The invention discloses a centering device and method used for a sheet-shaped material tensile test. The centering device comprises a centering reinforcing sheet and a sticking compaction device, wherein the sticking compaction device comprises a supporting frame and compaction blocks; the compaction blocks are mounted on the supporting frame in pairs; the compaction blocks in each pair are correspondingly arranged up and down; the compaction blocks are mounted on the supporting frame by slide blocks and guide rails; V-shaped grooves are formed in the surfaces of the compaction blocks; the V-shaped grooves of each pair of the compaction blocks are opposite; one face of the centering reinforcing sheet is provided with a semi-cylindrical bulge and the other face of the centering reinforcing sheet is provided with a groove as long as the semi-cylindrical bulge. The centering method comprises the following steps: applying glue, sticking, compacting and the like. According to the centering device and the centering method, manual visual inspection for adjusting a centering position is not needed, and a limiting mechanism for assisting centering is omitted; and the operation process is simple, the reliable centering of a test sample and a chuck is guaranteed and the efficiency of batch tests is improved.

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...

AI Technical Summary

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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