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Bidirectional shear test device for metal plates

A two-way shearing and testing device technology, which is applied in measuring devices, using stable shear force to test the strength of materials, analyzing materials, etc., can solve the problems of less performance research, high cost, and material performance impact, and achieve the triangle Accurate transformation, no relative displacement, and improved reliability

Active Publication Date: 2019-01-29
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many shear tests on metal plates and test methods including shear, but there are few studies on the performance of plates in two-way shear, and different deformation states have a great impact on material properties
[0003] After searching the literature of the prior art, it was found that the Chinese patent with the publication number CN108169036A, the name of the invention: a mechanical two-way shearing device for metal sheets, which can realize two-way shearing of metal sheets, and is used for research on two-way shearing The deformation behavior, but the deformation ratio between the rotary shear and the downward shear described in this device is fixed. If you want to change the deformation ratio, you need to replace different connecting rods, and the size of the connecting rods is proposed Requirements, high cost and very inconvenient
In addition, during the test, the ratio of the two deformation modes is not constant, which will have a certain impact on the test results
At the same time, the inner and outer rings of the test piece are fixed with bolts. When the inner ring is fixed, the bolts of the outer ring are inconvenient to install, and relative sliding is prone to occur.
Due to the self-locking phenomenon of the use of the link mechanism, it will affect the maximum operating displacement during the test, and it cannot be used to study the material properties of the material during cyclic shearing

Method used

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  • Bidirectional shear test device for metal plates
  • Bidirectional shear test device for metal plates
  • Bidirectional shear test device for metal plates

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Embodiment Construction

[0028] The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0029] see figure 1 , the present invention is a metal plate two-way shearing test device, including a servo motor, a speed reduction mechanism, a measuring instrument, a pulling, compressing and shearing mechanism and a rotating mechanism. The servo motor is used to provide the power of the entire two-way shearing device, and the forward and reverse rotation of the servo motor can be realized by programming, so as to perform tensile shear or compression shear and rotational shear deformation, and study the forward and reverse shear performance of materials. The two-way shear specimen is a circular plate-shaped structure, and coaxial annular grooves are arranged at the same position on both ends of the specimen.

[0030] Since a small movement speed is required for the shear test, it...

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PUM

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Abstract

The invention discloses a bidirectional shear test device for metal plates, comprising a servo motor, a speed reduction mechanism, a measuring instrument, a tension and compression shearing mechanismand a rotary shearing mechanism, wherein the servo motor supplies power to the whole device to drive the operation of the whole device; the speed reduction mechanism is configured to convert the high-speed motor rotation into low-speed shearing motion; the measuring instrument is configured to measure the force and deformation generated during the test; and the tension and compression shearing mechanism and the rotary shearing mechanism are the actuators of the entire test device in order to achieve shear deformation in both directions of the bidirectional shear test piece. The motor drive canrealize the constant tension, compression shear deformation and rotational shear deformation at any ratio during bidirectional shearing, and improve the reliability of the test results. The forward and reverse shearing of the metal plates can be realized by the forward and reverse rotation of the drive system to obtain a more comprehensive study of material properties.

Description

technical field [0001] The invention belongs to a test device, which is a test device which can be used to measure the shear performance of metal plates, and in particular relates to a two-way shear test device for metal plates. Background technique [0002] In recent years, in order to improve the utilization rate of materials as much as possible and give full play to the properties of materials, some new testing methods of material properties have been gradually adopted by people. The shear test of sheet metal has attracted extensive attention because of its wide range of test strains and the ability to study the behavior of materials with large strains. At present, there are many shear tests on metal plates and test methods including shear, but there are few studies on the properties of plates under bidirectional shear, and different deformation states have a great influence on material properties. [0003] After searching the literature of the prior art, it was found th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24G01N3/02
CPCG01N3/02G01N3/24G01N2203/0025G01N2203/005G01N2203/0208G01N2203/0282G01N2203/0676G01N2203/0682
Inventor 吴建军邬洪飞姜强王明智张增坤王奇帅杨东升
Owner NORTHWESTERN POLYTECHNICAL UNIV
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