Constant load stress corrosion test tool

Abstract

The utility model relates to the technical field of test detection appliances, and provides a constant load stress corrosion test tool which comprises a frame body, and an avoiding space for accommodating a test bar is arranged in the frame body; the two sides of the frame body are provided with a clamping column and a loading assembly respectively. One end, extending into the abdicating space, of the clamping column is fixedly connected with the test bar, and one end, positioned outside the frame body, of the clamping column is fixedly connected with a stop block; the loading assembly comprises a loading shaft; one end of the loading shaft is fixedly connected with a sliding block which extends into the abdicating space and is fixedly connected with the test bar, and the other end of the loading shaft is screwed with a locking nut; the loading shaft is further movably sleeved with a belleville spring located between the frame body and the locking nut. Therefore, according to the utility model, the test bar is fixed in the abdicating space of the frame body, and the belleville spring is pressed to load a constant load on the test bar. And the loading of a testing machine is replaced, so that the dependence on a special testing machine is reduced, the efficiency of the stress corrosion test is improved, and the test cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of testing and inspection equipment, and in particular relates to a constant load stress corrosion testing fixture. Background Technology

[0002] Stress corrosion testing is a routine inspection item for 2-series and 7-series aluminum alloy products. During testing, a constant load needs to be applied to both ends of a bar-shaped tensile specimen. Currently, a dedicated testing machine is typically used, with weights employed to maintain the constant load.

[0003] However, a single testing machine can only test one sample at a time, resulting in high testing costs and low testing efficiency, making it unsuitable for large-scale testing.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] To address the aforementioned shortcomings, this utility model primarily provides a constant load stress corrosion testing fixture, thereby solving the technical problem of low efficiency in stress corrosion testing.

[0006] To address the aforementioned problems, this utility model provides a constant load stress corrosion test fixture, comprising a frame body with a clearance space for accommodating test bars; clamping columns and loading components are respectively provided on both sides of the frame body.

[0007] One end of the clamping column extending into the clearance space is fixed to the test bar, and the other end located outside the frame body is fixed to the stop block.

[0008] The loading assembly includes a loading shaft; one end of the loading shaft is fixedly connected to a slider that extends into the clearance space and is fixedly connected to the test bar, and the other end is screwed to a locking nut; a butterfly spring located between the frame body and the locking nut is also movably sleeved on the loading shaft.

[0009] According to the constant load stress corrosion test fixture of this utility model, a groove is provided on the frame body to connect the clearance space; the slider is slidably disposed in the groove.

[0010] According to the constant load stress corrosion test fixture of this utility model, the cross-sectional shape of the stop block is a regular hexagon.

[0011] According to the constant load stress corrosion test fixture of this utility model, the number of the disc springs is not less than three.

[0012] According to the constant load stress corrosion test fixture of this utility model, the number of the disc springs is five.

[0013] According to the constant load stress corrosion test fixture of this utility model, the connection between the clamping column and the slider and the test bar is a threaded connection.

[0014] According to the constant load stress corrosion test fixture of this utility model, the frame body has a supporting boss on the side facing the locking nut.

[0015] According to the constant load stress corrosion test fixture of this utility model, the supporting boss is cylindrical, and the outer wall of the supporting boss is screwed with a protective sleeve.

[0016] According to the constant load stress corrosion test fixture of this utility model, the test fixture, except for the test bar, is coated with a protective coating.

[0017] According to the constant load stress corrosion test fixture of this utility model, the protective coating is a paraffin layer.

[0018] In summary, this invention fixes the test bar in the clearance space of the frame and applies a constant load to the test bar by compression of a disc spring. This replaces the use of a testing machine for loading, reduces reliance on a dedicated testing machine, improves the efficiency of stress corrosion testing, and lowers the cost of the test. Attached Figure Description

[0019] Figure 1 This is an exploded structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the frame structure of this utility model;

[0021] Figure 3 This is a structural schematic diagram of the loading component of this utility model;

[0022] In the figure: 1-frame body, 11-slide groove, 12-leaving space, 13-support boss; 2-clamping column, 21-stop block; 3-loading shaft, 31-slider, 32-locking nut, 33-butterfly spring; 4-protective sleeve, 100-test bar. Detailed Implementation

[0023] See Figure 1-3 This utility model provides a constant load stress corrosion test fixture, including a frame body 1, wherein the frame body 1 is provided with a clearance space 12 for accommodating a test bar 100; and clamping columns 2 and loading components are respectively provided on both sides of the frame body 1.

[0024] One end of the clamping column 2 that extends into the clearance space 12 is fixed to the test rod 100, and the other end located outside the frame body 1 is fixed to the stop block 21.

[0025] The loading assembly includes a loading shaft 3; one end of the loading shaft 3 is fixedly connected to a slider 31 that extends into the clearance space 12 and is fixedly connected to the test rod 100, and the other end is screwed to a locking nut 32; a butterfly spring 33 located between the frame body 1 and the locking nut 32 is also movably sleeved on the loading shaft 3.

[0026] The two ends of the test bar 100 of this invention are fixedly connected to the clamping column 2 and the slider 31, respectively. Tightening the locking nut 32 causes the stop block 21 to abut against the outer wall of the frame body 1. Then, the locking nut 32 is continued to be tightened until the test bar 100 reaches a predetermined deformation amount. At this point, the disc spring 33 is in a state of compression deformation, thereby generating tension on the test bar 100. The locking nut 32 restricts the axial extension of the disc spring 33, thus keeping the tension generated by the disc spring 33 constant and providing a constant load for the test bar 100.

[0027] The test is then conducted under a set environment for stress corrosion testing. For example, the sample is placed in a 3.5% salt solution for corrosion testing.

[0028] As a preferred solution, to avoid corrosion of the various components of the tooling during the testing process, the testing tooling of this utility model, except for the test bar 100, is coated with a protective coating.

[0029] Preferably, the protective coating is a paraffin layer. After the sample 100 is clamped, the entire fixture is immersed in molten wax, leaving only the test section of the sample exposed, while the surface of the remaining parts is sealed with paraffin to form a protective layer.

[0030] This invention fixes the test bar 100 in the clearance space 12 of the frame body 1 and applies a constant load to the test bar 100 by compression through a disc spring 33. This replaces the use of a testing machine for loading, reduces reliance on a dedicated testing machine, improves the efficiency of stress corrosion testing, and reduces testing costs.

[0031] The number of disc springs 33 can be adaptively set according to the requirements of the test load. To facilitate the tightening operation of the locking nut 32, the number of disc springs 33 in this invention is not less than three, and preferably five.

[0032] Preferably, the cross-sectional shape of the stop 21 is a regular hexagon, which facilitates tightening with a wrench.

[0033] As one embodiment, the frame body 1 is provided with a groove 11 that connects to the clearance space 12; the slider 31 is slidably disposed in the groove 11; when the locking nut 32 is tightened, the loading shaft 3 is prevented from rotating; the slider 31 moves axially within the groove 11.

[0034] Optionally, the clamping column 2 and the slider 31 are connected to the test bar 100 by threaded connection; this avoids drilling holes in the test bar 100, making processing convenient and clamping stable.

[0035] As one embodiment, the frame body 1 has a support boss 13 on the side facing the locking nut 32; after the locking nut 32 is tightened, the disc spring 33 abuts against the support boss 13, with a large contact area and stable applied load.

[0036] Furthermore, the support boss 13 is cylindrical, and the outer wall of the support boss 13 is screwed with a protective sleeve 4; the locking nut 32, the butterfly spring 33 and the loading shaft 3 are all located inside the protective sleeve 4 to avoid corrosion and extend service life.

[0037] In summary, this invention provides a constant load stress corrosion testing fixture. By fixing the test bar within the clearance space of the frame and applying a constant load to the test bar via a disc spring, it replaces the use of a testing machine for loading, reducing reliance on a dedicated testing machine, improving the efficiency of stress corrosion testing, and lowering the testing cost.

[0038] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A constant load stress corrosion test fixture, characterized in that, The device includes a frame body, within which a clearance space is provided for accommodating the test bar; clamping posts and loading components are respectively provided on both sides of the frame body. One end of the clamping column extending into the clearance space is fixed to the test bar, and the other end located outside the frame body is fixed to the stop block. The loading assembly includes a loading shaft; one end of the loading shaft is fixedly connected to a slider that extends into the clearance space and is fixedly connected to the test bar, and the other end is screwed to a locking nut; a butterfly spring located between the frame body and the locking nut is also movably sleeved on the loading shaft.

2. The constant load stress corrosion test fixture as described in claim 1, characterized in that, The frame body has a groove that connects to the clearance space; the slider is slidably disposed in the groove.

3. The constant load stress corrosion test fixture as described in claim 1, characterized in that, The cross-sectional shape of the stop block is a regular hexagon.

4. The constant load stress corrosion test fixture as described in claim 1, characterized in that, The number of disc springs shall not be less than three.

5. The constant load stress corrosion test fixture as described in claim 4, characterized in that, The number of disc springs is five.

6. The constant load stress corrosion test fixture as described in claim 1, characterized in that, The clamping column and slider are all connected to the test bar by threaded connections.

7. The constant load stress corrosion test fixture as described in any one of claims 1 to 6, characterized in that, The frame body has a support boss on the side facing the locking nut.

8. The constant load stress corrosion test fixture as described in claim 7, characterized in that, The support boss is cylindrical, and a protective sleeve is screwed to the outer wall of the support boss.

9. The constant load stress corrosion test fixture as described in claim 7, characterized in that, Except for the test bar, all of the test fixtures are coated with a protective coating.

10. The constant load stress corrosion test fixture as described in claim 9, characterized in that, The protective coating is a paraffin layer.

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