Compression device suitable for X-ray tomography

Abstract

The invention discloses a compression device suitable for X-ray tomography, and relates to the field of material mechanical property testing, the compression device comprises a shell, a manual loading component, a compression punch, an elastic component, a sample table, a pressure monitoring component and a base, the elastic component sleeves a second compression rod, the first compression rod is mounted in a first hole section, and the second compression rod is mounted in a second hole section; the second compression rod is installed in the first hole section and the second hole section and can extend into the X-ray penetrating cylinder, the compression punch can slide in the axial direction of the upper cylinder and is fixed to the upper cylinder in the circumferential direction, and the manual loading component is installed in the top hole section and can make the compression punch move downwards; the base is detachably mounted at the bottom of the lower barrel, the sample table is connected with the base through a pressure monitoring component, and the upper part of the sample table is positioned in the X-ray transmission barrel. The device effectively realizes uniform stress of a thin film material sample in the compression process, achieves the purpose of high-precision experiment, and is simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] The invention relates to the field of material mechanical property testing, and in particular to a compression device suitable for X-ray tomography. Background Art

[0002] When performing compression deformation experiments on materials through X-ray tomography, an in-situ loading device is usually used. When using an in-situ loading device to perform compression experiments on micron-level thin film materials, the following problems are often encountered: For micron-level thin film materials, during the compression experiment using an in-situ loading device, factors such as complex design, large system transmission errors, insufficient rigidity or unstable structure will cause uneven force on the sample. In particular, when it is necessary to scan the internal microstructure of the sample during the experiment, the uneven force causes non-uniform deformation of the thin film material sample, affecting the accurate evaluation of the mechanical properties of the material. At the same time, the in-situ loading device in the prior art has a complex structure and high manufacturing cost. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a compression device suitable for X-ray tomography, which effectively realizes uniform stress on thin film material samples during the compression process, achieves high-precision experimental purposes, has a simple structure and low manufacturing cost.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a compression device suitable for X-ray tomography, comprising a shell, a manual loading component, a compression punch, an elastic component, a sample stage, a pressure monitoring component and a base, wherein the shell comprises an upper cylinder, an X-ray transmission cylinder and a lower cylinder connected in sequence from top to bottom, wherein a top hole section, a first hole section and a second hole section are arranged in sequence from top to bottom in the upper cylinder, a first limiting step is formed between the first hole section and the second hole section, the compression punch comprises a first compression rod and a second compression rod arranged in sequence from top to bottom, a second limiting step is formed between the first compression rod and the second compression rod, the elastic component is sleeved on the second compression rod, and the first compression rod is arranged The second compression rod is installed in the first hole section, the second compression rod is installed in the first hole section and the second hole section, and can extend into the X-ray transparent cylinder, the compression punch can slide along the axial direction of the upper cylinder, and the compression punch is circumferentially fixed to the upper cylinder, the upper and lower ends of the elastic component are limited by the second limiting step and the first limiting step respectively, the manual loading component is installed in the top hole section, and can make the compression punch move downward; the base can be detachably installed on the bottom of the lower cylinder, the sample stage is connected to the base through the pressure monitoring component, and the upper part of the sample stage is located in the X-ray transparent cylinder.

[0006] Preferably, the first hole segment and the second hole segment are both cylindrical holes, the first compression rod and the second compression rod are both cylindrical rods, the inner diameter of the first hole segment is larger than the inner diameter of the second hole segment, and the outer diameter of the first compression rod is larger than the outer diameter of the second compression rod.

[0007] Preferably, two strip holes are symmetrically arranged on both sides of the upper cylinder, the length direction of the strip holes is consistent with the axial direction of the upper cylinder, the two strip holes are connected with the first hole section, and a limiting rod is passed through the upper part of the first compression rod, and the two ends of the limiting rod are respectively slidably installed in the two strip holes.

[0008] Preferably, the manual loading component is a differential head, an internal thread is provided on the inner wall of the top hole section, and the locking ring of the differential head is threadedly installed in the top hole section. By twisting the differential cylinder of the differential head, the measuring rod of the differential head and the measuring head at the lower end of the measuring rod can be driven to move up and down.

[0009] Preferably, a locking hole for accommodating the measuring head is provided on the top of the first compression rod.

[0010] Preferably, a third hole segment and a fourth hole segment are sequentially arranged in the lower cylinder from top to bottom, the base is installed in the fourth hole segment, and the upper end of the sample stage passes through the fourth hole segment and extends into the X-ray transmission cylinder.

[0011] Preferably, the third hole segment and the fourth hole segment are both cylindrical holes, the fourth hole segment is provided with an internal thread, the upper portion of the base is provided with an external thread, and the base is threadably installed in the fourth hole segment.

[0012] Preferably, the base comprises a first cylinder and a second cylinder which are sequentially arranged from top to bottom, an external thread is arranged on the outside of the first cylinder, and the first cylinder is threadably installed in the fourth hole segment.

[0013] Preferably, the upper and lower ends of the pressure monitoring component are respectively provided with upper studs and lower studs, the lower part of the sample table is provided with an upper threaded hole, and the base is provided with a lower threaded hole, and the upper stud and the lower stud are respectively installed in the upper threaded hole and the lower threaded hole.

[0014] Preferably, the pressure monitoring component is a pressure sensor, and the elastic component is a spring.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The compression device suitable for X-ray tomography of the present invention manually applies load to the thin film material sample step by step and slowly through a manual loading component, thereby avoiding the problem of uneven compression deformation caused by factors such as complex design, large system transmission error or unstable structure of the existing electric in-situ loading device. In addition, the compression punch is circumferentially fixed to the upper cylinder, so that the compression punch will not rotate relative to the upper cylinder, ensuring the non-rotational compression of the thin film material sample, which is only subjected to normal pressure and will not cause torsional deformation of the thin film material sample. The device effectively realizes uniform force on the thin film material sample during the compression process and achieves the experimental purpose of high precision. At the same time, the device adopts a manual loading scheme with a simple structure, which not only reduces the manufacturing difficulty, but also greatly reduces the equipment and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the external structure of a compression device suitable for X-ray tomography provided by the present invention;

[0019] Figure 2 A schematic diagram of the internal structure of a compression device suitable for X-ray tomography provided by the present invention;

[0020] Figure 3 An exploded view of a compression device suitable for X-ray tomography provided by the present invention;

[0021] Figure 4 A cross-sectional view of the compression device for X-ray tomography provided by the present invention when no differential head is installed;

[0022] Figure 5 A schematic diagram of the structure of a differential head in a compression device suitable for X-ray tomography provided by the present invention;

[0023] Figure 6 A partial enlarged view of the X-ray penetrating cylinder in the compression device suitable for X-ray tomography provided by the present invention;

[0024] Figure 7 A schematic structural diagram of a compression punch in a compression device suitable for X-ray tomography provided by the present invention when the compression punch surface is a plane;

[0025] Figure 8A schematic structural diagram of a compression punch in a compression device suitable for X-ray tomography provided by the present invention when the compression punch surface has a groove.

[0026] Description of reference numerals: 100, compression device suitable for X-ray tomography; 1, upper cylinder; 101, top hole section; 102, first hole section; 103, second hole section; 2, X-ray transmission cylinder; 3, lower cylinder; 301, third hole section; 302, fourth hole section; 4, differential head; 401, differential cylinder; 402, locking ring; 403, measuring rod; 404, measuring head; 405, differential cylinder scale; 406, reference line; 5, compression punch; 501, first compression rod; 502, second compression rod; 503, positioning hole; 504, radial mounting hole; 505, compression punch surface; 6, limiting rod; 7, strip hole; 8, elastic component; 9, sample table; 901, round plate; 902, connecting cylinder; 10, pressure monitoring component; 11, base; 1101, first cylinder; 1102, second cylinder; 12, upper stud; 13, lower stud; 14, upper threaded hole; 15, lower threaded hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The purpose of the present invention is to provide a compression device suitable for X-ray tomography, which effectively realizes uniform stress on thin film material samples during compression, achieves high-precision experimental purposes, has a simple structure and low manufacturing cost.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1-Figure 8As shown, this embodiment provides a compression device 100 suitable for X-ray tomography, including a shell, a manual loading component, a compression punch 5, an elastic component 8, a sample stage 9, a pressure monitoring component 10 and a base 11. The shell includes an upper cylinder 1, an X-ray transparent cylinder 2 and a lower cylinder 3 connected in sequence from top to bottom. The upper cylinder 1 is provided with a top hole section 101, a first hole section 102 and a second hole section 103 in sequence from top to bottom, and a first limiting step is formed between the first hole section 102 and the second hole section 103. The compression punch 5 includes a first compression rod 501 and a second compression rod 502 arranged in sequence from top to bottom, and a second limiting step is formed between the first compression rod 501 and the second compression rod 502. The elastic component 8 is sleeved on the second compression rod 502, the first compression rod 501 is installed in the first hole section 102, the second compression rod 502 is installed in the first hole section 102 and the second hole section 103, and can extend into the X-ray transparent cylinder 2, the compression punch 5 can slide along the axial direction of the upper cylinder 1, and the compression punch 5 is circumferentially fixed to the upper cylinder 1, the upper and lower ends of the elastic component 8 are limited by the second limiting step and the first limiting step respectively, the manual loading component is installed in the top hole section 101, and can make the compression punch 5 move downward; the base 11 can be detachably installed at the bottom of the lower cylinder 3, the sample table 9 is connected to the base 11 through the pressure monitoring component 10, and the upper part of the sample table 9 is located in the X-ray transparent cylinder 2.

[0031] In this embodiment, the load is manually applied to the film material sample step by step and slowly through a manual loading component, thereby avoiding the problem of uneven compression deformation caused by factors such as complex design, large system transmission error or unstable structure of the existing electric in-situ loading device. In addition, the compression punch 5 is circumferentially fixed to the upper cylinder 1, so that the compression punch 5 will not rotate relative to the upper cylinder 1, ensuring the non-rotational compression of the film material sample, which is only subjected to normal pressure and will not cause torsional deformation of the film material sample. The device effectively realizes uniform force on the film material sample during the compression process and achieves the experimental purpose of high precision. At the same time, the device adopts a manual loading scheme with a simple structure, which not only reduces the manufacturing difficulty, but also greatly reduces the equipment and maintenance costs, making up for the shortcomings of the existing devices that are high in cost and difficult to promote and apply due to the complex structure.

[0032] Specifically, the first hole section 102 and the second hole section 103 are both cylindrical holes, the first compression rod 501 and the second compression rod 502 are both cylindrical rods, the inner diameter of the first hole section 102 is greater than the inner diameter of the second hole section 103, and the outer diameter of the first compression rod 501 is greater than the outer diameter of the second compression rod 502. The first compression rod 501 matches the first hole section 102 in structure, and the second compression rod 502 matches the second hole section 103 in structure.

[0033] Two strip holes 7 are symmetrically arranged on both sides of the upper cylinder 1, and the length direction of the strip holes 7 is consistent with the axial direction of the upper cylinder 1. The two strip holes 7 are both connected to the first hole section 102. A limiting rod 6 is passed through the upper part of the first compression rod 501, and the two ends of the limiting rod 6 are respectively slidably installed in the two strip holes 7, so that the first compression rod 501 is circumferentially fixed to the upper cylinder 1, so that the first compression rod 501 will not rotate relative to the upper cylinder 1.

[0034] In this embodiment, a radial mounting hole 504 is provided on the upper portion of the first compression rod 501, and the limiting rod 6 is used to be installed in the radial mounting hole 504. After the limiting rod 6 is installed, it fits tightly with the inner wall of the radial mounting hole 504 to prevent the limiting rod 6 from falling. At the same time, when a sufficiently large pulling force is applied, the limiting rod 6 can be pulled out of the radial mounting hole 504.

[0035] In this specific embodiment, the limiting rod 6 is a cylindrical pin, and the radial mounting hole 504 is a pin hole.

[0036] The manual loading component in this embodiment can be detachably installed in the top hole section 101, so that the manual loading component can be easily removed from the top hole section 101 to facilitate the replacement of the compression punch 5.

[0037] Specifically, the manual loading component is a differential head 4, an internal thread is provided on the inner wall of the top hole section 101, a locking ring 402 of the differential head 4 is threadedly installed in the top hole section 101, and the measuring rod 403 of the differential head 4 and the measuring head 404 at the lower end of the measuring rod 403 can be driven to move up and down by twisting the differential cylinder 401 of the differential head 4. The differential head 4 is convenient to be screwed out from the upper part of the upper cylinder 1, so as to facilitate the replacement of the compression punch 5.

[0038] The probe 404 in this embodiment is hemispherical, and a positioning hole 503 for accommodating the probe 404 is provided on the top of the first compression rod 501. The probe 404 and the positioning hole 503 are clearance-matched, which reduces the friction force on the compression punch 5 when the probe 404 rotates, and avoids the use of transmission components to actuate the displacement of the compression punch 5, thereby avoiding the problem of uneven force caused by the transmission components.

[0039] Specifically, clockwise rotation of the differential cylinder 401 can extend the measuring rod 403, so that the probe 404 at the lower end of the measuring rod 403 moves downward, thereby moving the compression punch 5 downward, and the compression punch 5 can apply a compressive force to the material. Counterclockwise rotation of the differential cylinder 401 can shorten the measuring rod 403, and the elastic component 8 can return the compression punch 5 when the measuring rod 403 shortens. The function of the limit rod 6 is to prevent the compression punch 5 from rotating, ensuring that the film material sample is only subjected to normal force. The film material sample is placed on the sample stage 9, located in the X-ray penetrating cylinder 2. When the compression punch 5 applies pressure downward, the film material sample will be compressed, and the pressure monitoring component 10 under the sample stage 9 can convert the pressure signal into an electrical signal output. When the differential cylinder 401 is rotated, the displacement distance of the compression punch 5 can be displayed by the differential cylinder scale 405 and the reference line 406.

[0040] The differential head 4 in this embodiment is an ultra-precision differential head, which is used as a manual loading component of the compression punch 5, and can not only precisely control the displacement of the compression punch 5, but also accurately display the displacement distance of the compression punch 5. The ultra-precision differential head advances 0.1 mm per circle, the scale resolution is 0.002 mm, and the stroke is 6.5 mm.

[0041] This embodiment solves the problems of hysteresis, overshoot and measurement error caused by the prior art by improving the actuation mode of the compression punch 5 and displaying the displacement of the compression punch 5 by scale, thereby realizing high-precision displacement control and scale display. This embodiment significantly improves the reliability and accuracy of the experimental device, which is a key improvement especially for the precision compression of micron-level thin film material samples. This embodiment can ensure the accuracy of the micron-level thin film material compression process, reduce errors, and ensure the accuracy and repeatability of the experimental results.

[0042] It should be noted that even force on the thin film material sample during compression can also be achieved by replacing the micrometer head 4 with a high-precision thread pair, but it has no scale and cannot display the displacement of compression.

[0043] In this embodiment, the inner diameter of the top hole section 101 is greater than the inner diameter of the first hole section 102, and the top hole section 101 is connected to the first hole section 102 through an inverted tapered hole section.

[0044] In this embodiment, the compression punch 5 with different compression punch faces 505 can be installed according to actual needs to study the uniform or non-uniform compression of the film material.

[0045] The specific replacement process is: remove the manual loading component from the top hole section 101, pull the limit rod 6 out of the radial mounting hole 504 of the first compression rod 501, and then take out the compression punch 5 from the upper part of the upper cylinder 1; install another compression punch 5 in the upper cylinder 1, so that the radial mounting hole 504 is aligned with the strip hole 7, and the limit rod 6 passes through a strip hole 7, the radial mounting hole 504 and the other strip hole 7 in sequence, and then install the manual loading component in the top hole section 101.

[0046] In this specific embodiment, Figure 7 As shown, the compression punch face 505 of the compression punch 5 is a plane.

[0047] In another specific embodiment, if Figure 8 As shown, a groove running through both ends is provided in the middle of the compression punch surface 505 of the compression punch 5 .

[0048] In this embodiment, the materials of the compression punch 5 and the sample table 9 can also be changed according to the film material sample. For low-density film material samples, materials such as engineering plastics, aluminum alloys and stainless steel can be used. For high-density film material samples, materials such as cemented carbide, titanium alloys and ceramics can be used.

[0049] A third hole section 301 and a fourth hole section 302 are sequentially arranged in the lower cylinder 3 from top to bottom. The base 11 is installed in the fourth hole section 302 . The upper end of the sample stage 9 passes through the fourth hole section 302 and extends into the X-ray transmission cylinder 2 .

[0050] Specifically, the third hole segment 301 and the fourth hole segment 302 are both cylindrical holes, the fourth hole segment 302 is provided with an internal thread, the upper part of the base 11 is provided with an external thread, and the base 11 is threadedly installed in the fourth hole segment 302, so that the base 11 can be easily installed on the lower cylinder 3 and easily removed from the lower cylinder 3.

[0051] The base 11 includes a first cylinder 1101 and a second cylinder 1102 arranged in sequence from top to bottom. The first cylinder 1101 is provided with an external thread on its exterior, and the first cylinder 1101 is threadedly installed in the fourth hole section 302 .

[0052] In this embodiment, the inner diameter of the third hole segment 301 is smaller than the inner diameter of the fourth hole segment 302 , and the third hole segment 301 is connected to the fourth hole segment 302 through a tapered hole segment.

[0053] In this embodiment, the inner diameters of the second hole section 103, the inner diameter of the X-ray transparent cylinder 2 and the inner diameter of the third hole section 301 are the same. The inner diameter of the X-ray transparent cylinder 2 is smaller than the outer diameters of the upper cylinder 1 and the lower cylinder 3.

[0054] The shell in this embodiment can be made of engineering plastics or organic glass to reduce the attenuation of X-rays. The wall thickness of the X-ray penetrating cylinder 2 is 1 mm. The thinning design of the X-ray penetrating cylinder 2 can reduce the attenuation of X-rays, thereby improving the imaging quality and shortening the imaging time of the material sample.

[0055] An upper stud 12 and a lower stud 13 are respectively provided at the upper and lower ends of the pressure monitoring component 10, an upper threaded hole 14 is provided at the lower part of the sample stage 9, and a lower threaded hole 15 is provided in the base 11. The upper stud 12 and the lower stud 13 are respectively installed in the upper threaded hole 14 and the lower threaded hole 15, thereby realizing the connection between the pressure monitoring component 10 and the sample stage 9 and the base 11.

[0056] The sample stage 9 in this embodiment includes a circular plate 901 and a connecting cylinder 902 arranged in sequence from top to bottom. An upper threaded hole 14 is arranged at the lower portion of the connecting cylinder 902 . The outer diameter of the circular plate 901 is smaller than the outer diameter of the connecting cylinder 902 .

[0057] In this specific embodiment, the pressure monitoring component 10 is a pressure sensor, and the elastic component 8 is a spring.

[0058] The compression device 100 for X-ray tomography in this embodiment is particularly suitable for compressing materials with small deformation. Through fine manual loading control and ingenious structural design, the problem of uneven force when compressing micron-level thin film materials is solved, the accuracy of displacement control and display is improved, and it has multiple technical advantages such as reduced X-ray intensity attenuation and low cost.

[0059] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A compression device suitable for X-ray tomography, characterized in that: The invention comprises a shell, a manual loading component, a compression punch, an elastic component, a sample stage, a pressure monitoring component and a base, wherein the shell comprises an upper cylinder, an X-ray transparent cylinder and a lower cylinder connected in sequence from top to bottom, wherein a top hole section, a first hole section and a second hole section are arranged in sequence from top to bottom in the upper cylinder, a first limiting step is formed between the first hole section and the second hole section, the compression punch comprises a first compression rod and a second compression rod arranged in sequence from top to bottom, a second limiting step is formed between the first compression rod and the second compression rod, the elastic component is sleeved on the second compression rod, the first compression rod is installed in the first hole section, and the The second compression rod is installed in the first hole section and the second hole section and can extend into the X-ray transparent cylinder. The compression punch can slide along the axial direction of the upper cylinder, and the compression punch is circumferentially fixed to the upper cylinder. The upper and lower ends of the elastic component are limited by the second limiting step and the first limiting step respectively. The manual loading component is installed in the top hole section and can move the compression punch downward. The base can be detachably installed on the bottom of the lower cylinder. The sample stage is connected to the base through the pressure monitoring component, and the upper part of the sample stage is located in the X-ray transparent cylinder.

2. The compression device suitable for X-ray tomography according to claim 1, characterized in that: The first hole segment and the second hole segment are both cylindrical holes, the first compression rod and the second compression rod are both cylindrical rods, the inner diameter of the first hole segment is greater than the inner diameter of the second hole segment, and the outer diameter of the first compression rod is greater than the outer diameter of the second compression rod.

3. The compression device suitable for X-ray tomography according to claim 1, characterized in that: Two strip holes are symmetrically arranged on both sides of the upper cylinder, the length direction of the strip holes is consistent with the axial direction of the upper cylinder, the two strip holes are connected with the first hole section, and a limiting rod is passed through the upper part of the first compression rod, and the two ends of the limiting rod are respectively slidably installed in the two strip holes.

4. The compression device suitable for X-ray tomography according to claim 1, characterized in that: The manual loading component is a differential head, and an internal thread is provided on the inner wall of the top hole section. The locking ring of the differential head is threadedly installed in the top hole section. By twisting the differential cylinder of the differential head, the measuring rod of the differential head and the measuring head at the lower end of the measuring rod can be driven to move up and down.

5. The compression device suitable for X-ray tomography according to claim 4, characterized in that: A locking hole for accommodating the measuring head is arranged on the top of the first compression rod.

6. The compression device suitable for X-ray tomography according to claim 1, characterized in that: The lower cylinder is provided with a third hole section and a fourth hole section in sequence from top to bottom, the base is installed in the fourth hole section, and the upper end of the sample stage passes through the fourth hole section and extends into the X-ray transmission cylinder.

7. The compression device suitable for X-ray tomography according to claim 6, characterized in that: The third hole segment and the fourth hole segment are both cylindrical holes, the fourth hole segment is provided with an internal thread, the upper portion of the base is provided with an external thread, and the base is threadably installed in the fourth hole segment.

8. The compression device suitable for X-ray tomography according to claim 7, characterized in that: The base includes a first cylinder and a second cylinder arranged in sequence from top to bottom, the first cylinder is provided with an external thread on the outside, and the first cylinder is threadably installed in the fourth hole segment.

9. The compression device suitable for X-ray tomography according to claim 1, characterized in that: The upper and lower ends of the pressure monitoring component are respectively provided with an upper stud and a lower stud, the lower part of the sample stage is provided with an upper threaded hole, and the base is provided with a lower threaded hole, and the upper stud and the lower stud are respectively installed in the upper threaded hole and the lower threaded hole.

10. The compression device suitable for X-ray tomography according to claim 1, characterized in that: The pressure monitoring component is a pressure sensor, and the elastic component is a spring.

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