Improved Clamping Mechanism of Fatigue Testing Machine for In Situ Imaging of Synchrotron Radiation Light Source
A technology of fatigue testing machine and clamping mechanism, which is applied in the direction of workpiece clamping device, optical testing of flaws/defects, material analysis using radiation, etc. It can solve problems such as loosening and unsmooth testing, and achieve clamping The sample is firm, the performance of buffering, vibration reduction and noise reduction is increased, and the image signal-to-noise ratio is high.
Active Publication Date: 2017-09-08
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
However, it is found that during the fatigue test of the fatigue testing machine, due to the severe vibration generated, and the clamping of the sample by the clamp during the test often causes loosening due to the severe vibration.
In addition, there is no further adjustment method after the plastic deformation of the sample, so that the test cannot go on smoothly. Based on this actual situation, it is very necessary to further improve the clamping mechanism of the fixture
Method used
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[0022] figure 1 , figure 2 Shown is a fatigue testing machine for in-situ imaging with a synchrotron radiation light source, which consists of: the cross 1a at the bottom of the bottom plate 1 is fitted on the platform 2 of the synchrotron radiation light source, and a cylindrical base 3 is fixed in the middle of the upper surface of the bottom plate 1 The push rod 4 is installed on the left wall and the right wall of the base 3 through a horizontal linear bearing-19; the left side of the base plate 1 upper surface is equipped with a servo motor 5, and the cam 6 is installed on the servo motor 5 shaft; the left end of the push rod 4 Hole is opened and rolling bearing shaft 27 is housed, and bearing shaft 27 is equipped with rolling bearing 7 and contacts with the right edge of cam 6, and the middle part of push rod 4 is hinged with the lower end of connecting rod 8, and the right end of push rod 4 is connected to the right side of base 3 by spring 9. on the wall.
[0023] T...
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The invention discloses an improved clamping mechanism of a fatigue testing machine for in-situ imaging of a synchrotron radiation light source, which is arranged on a platform cylindrical base of the synchrotron radiation light source. The clamping mechanism includes a sample clamping unit and an additional adjustment unit for plastic deformation. The sample clamping unit is vertically arranged along the central axis of the testing machine base, and is divided into two parts: the lower chuck section and the upper chuck section. The upper chuck section is provided with an additional adjustment unit for plastic deformation. Compared with the previous generation of fatigue testing machine, the present invention has made further improvements, increasing the performance of buffering, vibration reduction and noise reduction of the system; fully ensuring that the load can be applied to the sample, and ensuring the overall bearing capacity of the testing machine; adding an adjustment unit for plastic deformation After the sample undergoes plastic deformation, the magnitude of the loaded force can be adjusted. Compared with the previous generation of testing machines, more detailed considerations have been made in the details of the test implementation process.
Description
technical field [0001] The invention relates to a sample clamping mechanism and installation and experiment method of a fatigue testing machine which uses a synchrotron radiation light source to perform in-situ imaging. Background technique [0002] For a long time, people have carried out a lot of research on the fatigue damage of engineering structures. It is generally believed that the fatigue life is mainly consumed in the stages of crack initiation and short crack growth. Macroscopically, the propagation behavior of short cracks changes with the increase of crack length, and microscopically, it is also affected by factors such as metal microstructure and environment, coupled with crack closure and small crack effects, etc. The problem of short crack propagation becomes very complicated. In order to better explore the relationship between the crack growth process and microstructure changes and macroscopic mechanical properties, and to provide a more reliable theoretica...
Claims
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IPC IPC(8): B25B11/00G01N21/84G01N21/88G01N23/04
CPCB25B11/00G01N21/84G01N21/88G01N23/04
Inventor 吴圣川张思齐张卫华
Owner SOUTHWEST JIAOTONG UNIV