Compression device suitable for X-ray tomography

Abstract

This invention discloses a compression device suitable for X-ray computed tomography, relating to the field of material mechanical property testing. It includes a shell, a manual loading component, a compression punch, an elastic component, a sample stage, a pressure monitoring component, and a base. The elastic component is sleeved on a second compression rod. A first compression rod is installed in a first bore section, and a second compression rod is installed in both the first and second bore sections, extending into the X-ray transmission cylinder. The compression punch can slide axially along the upper cylinder and is circumferentially fixed to the upper cylinder. The manual loading component is installed in a top bore section and allows the compression punch to move downwards. The base is detachably installed at the bottom of the lower cylinder. The sample stage is connected to the base via the pressure monitoring component, with its upper part located within the X-ray transmission cylinder. This device effectively achieves uniform stress on thin film material samples during compression, achieving high-precision experimental results. It has a simple structure and low manufacturing cost.

Description

Technical Field

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

[0002] In compression deformation experiments of materials using X-ray tomography, in-situ loading devices are typically employed. However, using in-situ loading devices for compression experiments on micron-sized thin film materials often presents the following challenges: For micron-sized thin film materials, uneven stress on the sample can occur due to factors such as complex design, large system transmission errors, insufficient stiffness, or structural instability. This uneven stress is particularly problematic when scanning the internal microstructure of the sample during the experiment, leading to non-uniform deformation and affecting the accurate assessment of the material's mechanical properties. Furthermore, existing in-situ loading devices are structurally complex and costly to manufacture. Summary of the Invention

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

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides a compression device suitable for X-ray computed tomography, comprising a housing, a manual loading component, a compression punch, an elastic component, a sample stage, a pressure monitoring component, and a base. The housing includes an upper cylinder, an X-ray transmission cylinder, and a lower cylinder connected sequentially from top to bottom. The upper cylinder has a top hole section, a first hole section, and a second hole section arranged sequentially from top to bottom, with a first limiting step formed between the first hole section and the second hole section. The compression punch includes a first compression rod and a second compression rod arranged sequentially from top to bottom, with a second limiting step 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 mounted on... The first compression rod is installed in the first and second bore sections and can extend into the X-ray transmission cylinder. The compression punch can slide along the axial direction of the upper cylinder and is circumferentially fixed to the upper cylinder. The upper and lower ends of the elastic member are limited by the second limiting step and the first limiting step, respectively. The manual loading member is installed in the top bore section and can move the compression punch downward. The base is detachably installed at the bottom of the lower cylinder. The sample stage is connected to the base through the pressure monitoring member. The upper part of the sample stage is located in the X-ray transmission cylinder.

[0006] Preferably, both the first and second hole segments are cylindrical holes, both the first and second compression rods are 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-shaped holes are symmetrically arranged on both sides of the upper cylinder, the length direction of the strip-shaped holes is consistent with the axial direction of the upper cylinder, both strip-shaped holes are connected to the first hole segment, and a limiting rod is provided through the upper part of the first compression rod, the two ends of the limiting rod are slidably installed in the two strip-shaped holes respectively.

[0008] Preferably, the manual loading component is a micrometer head, and the inner wall of the top hole section is provided with an internal thread. The locking ring of the micrometer head is threadedly installed in the top hole section. By turning the micrometer head's micrometer cylinder, the probe of the micrometer head and the probe at the lower end of the probe can be moved up and down.

[0009] Preferably, the top of the first compression rod is provided with a locking hole for accommodating the probe.

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

[0011] Preferably, the third hole and the fourth hole are both cylindrical holes, the fourth hole has an internal thread, the upper part of the base has an external thread, and the base is threadedly installed in the fourth hole.

[0012] Preferably, the base includes a first cylinder and a second cylinder arranged sequentially from top to bottom, the first cylinder having an external thread on its exterior, and the first cylinder being threadedly installed in the fourth hole segment.

[0013] Preferably, the pressure monitoring component has an upper stud and a lower stud at its upper and lower ends, respectively. The sample stage has an upper threaded hole at its lower part, and the base has a lower threaded hole. 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] The present invention achieves the following technical effects compared to the prior art:

[0016] The compression device for X-ray computed tomography of this invention applies load to thin film material samples manually, gradually, and slowly via a manual loading component. This avoids the uneven compression deformation problems caused by existing electric in-situ loading devices, which suffer from complex design, large system transmission errors, or structural instability. Furthermore, the compression punch is circumferentially fixed to the upper cylinder, preventing rotation of the punch relative to the cylinder and ensuring non-rotational compression of the thin film material sample. The sample is subjected only to normal pressure, preventing torsional deformation. This device effectively achieves uniform stress on the thin film material sample during compression, achieving high-precision experimental results. Simultaneously, the device employs a simple manual loading scheme, reducing manufacturing difficulty and significantly decreasing equipment and maintenance costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

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

[0020] Figure 3 Exploded view of the compression device for X-ray computed 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 without the differential head installed;

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

[0023] Figure 6 A magnified view of the X-ray transmission point through the cylinder in the compression device for X-ray tomography provided by the present invention;

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

[0025] Figure 8This is a schematic diagram of the structure of the compression punch in the compression device for X-ray tomography provided by the present invention, wherein the compression punch surface has a groove.

[0026] Explanation of reference numerals in the attached drawings: 100, Compression device suitable for X-ray tomography; 1, Upper cylinder; 101, Top aperture section; 102, First aperture section; 103, Second aperture section; 2, X-ray transmission cylinder; 3, Lower cylinder; 301, Third aperture section; 302, Fourth aperture section; 4, Differential head; 401, Differential cylinder; 402, Locking ring; 403, Probe; 404, Probe; 405, Differential cylinder scale; 406, Baseline; 5, Compression punch; 501, First compression rod; 502, Second compression rod; 503, Locking hole; 504, Radial mounting hole; 505, Compression punch surface; 6, Limiting rod; 7, Strip hole; 8, Elastic component; 9, Sample stage; 901, Circular 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 Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

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

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1-8As shown, this embodiment provides a compression device 100 suitable for X-ray computed tomography, including a housing, 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 housing includes an upper cylinder 1, an X-ray passing cylinder 2, and a lower cylinder 3 connected sequentially from top to bottom. The upper cylinder 1 has a top hole section 101, a first hole section 102, and a second hole section 103 arranged sequentially from top to bottom, with a first limiting step 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 sequentially from top to bottom, with a second limiting step formed between the first compression rod 501 and the second compression rod 502. The elastic component... 8 are mounted 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 transmission 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 member 8 are limited by the second limiting step and the first limiting step, respectively. The manual loading member is installed in the top hole section 101 and can make the compression punch 5 move downward. The base 11 is detachably installed at the bottom of the lower cylinder 3. The sample stage 9 is connected to the base 11 through the pressure monitoring member 10. The upper part of the sample stage 9 is located in the X-ray transmission cylinder 2.

[0031] In this embodiment, the load on the thin film material sample is applied manually, gradually, and slowly using a manual loading component. This avoids the uneven compression deformation problems caused by existing electric in-situ loading devices, which suffer from complex design, large system transmission errors, or structural instability. Furthermore, the compression punch 5 is circumferentially fixed to the upper cylinder 1, preventing rotation of the compression punch 5 relative to the upper cylinder 1. This ensures non-rotational compression of the thin film material sample, subjecting it only to normal pressure and preventing torsional deformation. This device effectively achieves uniform stress on the thin film material sample during compression, achieving high-precision experimental results. Simultaneously, the device employs a simple manual loading scheme, reducing manufacturing difficulty and significantly decreasing equipment and maintenance costs, thus overcoming the shortcomings of existing devices that are costly and difficult to widely apply due to their complex structures.

[0032] Specifically, both the first hole segment 102 and the second hole segment 103 are cylindrical holes, and both the first compression rod 501 and the second compression rod 502 are cylindrical rods. The inner diameter of the first hole segment 102 is larger than the inner diameter of the second hole segment 103, and the outer diameter of the first compression rod 501 is larger than the outer diameter of the second compression rod 502. The first compression rod 501 is structurally matched with the first hole segment 102, and the second compression rod 502 is structurally matched with the second hole segment 103.

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

[0034] In this embodiment, the upper part of the first compression rod 501 is provided with a radial mounting hole 504. 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 against the inner wall of the radial mounting hole 504 to prevent the limiting rod 6 from falling off. At the same time, when a sufficiently large pulling force is applied, the limiting rod 6 can be pulled out from 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] In this embodiment, the manual loading component can be detachably installed in the top hole section 101, making it easy to remove the manual loading component from the top hole section 101 for replacement of the compression punch 5.

[0037] Specifically, the manual loading component is the micrometer head 4, which has an internal thread on the inner wall of the top bore section 101. The locking ring 402 of the micrometer head 4 is threaded into the top bore section 101. By turning the micrometer cylinder 401 of the micrometer head 4, the measuring rod 403 of the micrometer head 4 and the measuring head 404 at the lower end of the measuring rod 403 can be moved up and down. The micrometer head 4 can be easily unscrewed from the upper part of the upper cylinder 1 for easy replacement of the compression punch 5.

[0038] In this embodiment, the probe 404 is hemispherical, and the top of the first compression rod 501 is provided with a locking hole 503 for accommodating the probe 404. The probe 404 and the locking hole 503 are fitted with a clearance, which reduces the friction force on the compression punch 5 when the probe 404 rotates. At the same time, it avoids the need to use transmission components to move the compression punch 5, thus avoiding the problem of uneven force caused by transmission components.

[0039] Specifically, rotating the differential cylinder 401 clockwise extends the measuring rod 403, causing the measuring head 404 at the lower end of the measuring rod 403 to move downwards, thereby moving the compression punch 5 downwards. The compression punch 5 can apply a compressive force to the material. Rotating the differential cylinder 401 counterclockwise shortens the measuring rod 403, and the elastic component 8 can return the compression punch 5 when the measuring rod 403 shortens. The limiting rod 6 prevents the compression punch 5 from rotating, ensuring that the thin film material sample is only subjected to normal force. The thin film material sample is placed on the sample stage 9, located in the X-ray transmission cylinder 2. When the compression punch 5 applies downward pressure, the thin film material sample will be compressed. The pressure monitoring component 10 below 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 through the differential cylinder scale 405 and the reference line 406.

[0040] In this embodiment, the differential head 4 is an ultra-precision differential head. Using the ultra-precision differential head as a manual loading component for the compression punch 5 allows for precise control of the compression punch 5's displacement and accurate display of its displacement distance. The ultra-precision differential head advances 0.1 mm per revolution, has a scale resolution of 0.002 mm, and a stroke of 6.5 mm.

[0041] This embodiment improves the actuation method of the compression punch 5 and displays its displacement via a scale, thus solving the problems of hysteresis, overshoot, and measurement error caused by existing technologies, thereby achieving high-precision displacement control and scale display. This embodiment significantly improves the reliability and accuracy of the experimental apparatus, especially for the precision compression of micron-sized thin film material samples, representing a crucial improvement. This embodiment ensures the accuracy of the micron-sized thin film material compression process, reduces errors, and guarantees the accuracy and repeatability of experimental results.

[0042] It should be noted that a high-precision threaded pair can also be used to replace the micrometer head 4 to achieve uniform force during the compression of thin film material samples, but it has no scale and cannot display the amount of displacement during compression.

[0043] In this embodiment, the inner diameter of the top hole section 101 is larger than the inner diameter of the first hole section 102, and the top hole section 101 and the first hole section 102 are connected by an inverted conical hole section.

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

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

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

[0047] In another specific embodiment, such as Figure 8 As shown, the compression punch 5 has a groove extending through both ends in the middle of the compression punch surface 505.

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

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

[0050] Specifically, the third hole section 301 and the fourth hole section 302 are both cylindrical holes. The fourth hole section 302 is provided with an internal thread, and the upper part of the base 11 is provided with an external thread. The base 11 is threaded into the fourth hole section 302, which makes it easy to install the base 11 on the lower cylinder 3 and easy to remove it from the lower cylinder 3.

[0051] The base 11 includes a first cylinder 1101 and a second cylinder 1102 arranged sequentially from top to bottom. The first cylinder 1101 has an external thread and is threaded into 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 and the fourth hole segment 302 are connected by a tapered hole segment.

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

[0054] In this embodiment, the outer shell can be made of materials such as engineering plastics or plexiglass to reduce the attenuation of X-rays. The wall thickness of the X-ray-passing cylinder 2 is 1 mm. The thinning design of the X-ray-passing cylinder 2 can reduce the attenuation of X-rays, thereby improving the imaging quality and shortening the imaging time of the material sample.

[0055] The pressure monitoring component 10 is provided with an upper stud 12 and a lower stud 13 at its upper and lower ends, respectively. The sample stage 9 is provided with an upper threaded hole 14 at its lower part and a lower threaded hole 15 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 sequentially from top to bottom. The lower part of the connecting cylinder 902 is provided with an upper threaded hole 14, and 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 minimal deformation. Through precise manual loading control and ingenious structural design, it solves the problem of uneven force distribution when compressing micron-sized thin film materials, improves the accuracy of displacement control and display, and offers several technical advantages such as reduced X-ray intensity attenuation and low cost.

[0059] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A compression device suitable for X-ray tomography, characterized in that, The system includes a housing, a manual loading component, a compression punch, an elastic component, a sample stage, a pressure monitoring component, and a base. The housing comprises an upper cylinder, an X-ray transmission cylinder, and a lower cylinder connected sequentially from top to bottom. The upper cylinder has a top section, a first section, and a second section arranged sequentially from top to bottom, with a first limiting step formed between the first and second sections. The compression punch includes a first compression rod and a second compression rod arranged sequentially from top to bottom, with a second limiting step formed between the first and second compression rods. The elastic component is sleeved on the second compression rod, and the first compression rod is installed in the first section. The second compression rod is installed in the first and second bore sections and can extend into the X-ray transmission cylinder. The compression punch can slide along the axial direction of the upper cylinder and is circumferentially fixed to the upper cylinder. The upper and lower ends of the elastic member are limited by the second limiting step and the first limiting step, respectively. The manual loading component is installed in the top bore section and can move the compression punch downward. The base is detachably installed at the bottom of the lower cylinder. The sample stage is connected to the base through the pressure monitoring component. The upper part of the sample stage is located in the X-ray transmission cylinder.

2. The compression device for X-ray tomography according to claim 1, characterized in that, Both the first and second hole segments are cylindrical holes, and both the first and second compression rods are 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.

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

4. The compression device for X-ray tomography according to claim 1, characterized in that, The manual loading component is a micrometer head. The inner wall of the top hole section is provided with an internal thread. The locking ring of the micrometer head is threaded in the top hole section. By turning the micrometer head's micrometer cylinder, the probe of the micrometer head and the probe at the lower end of the probe can be moved up and down.

5. The compression device for X-ray tomography according to claim 4, characterized in that, The top of the first compression rod is provided with a locking hole for accommodating the probe.

6. The compression device for X-ray tomography according to claim 1, characterized in that, The lower cylinder has a third hole section and a fourth hole section arranged sequentially from top to bottom. The base is installed in the fourth hole section, and the upper end of the sample stage extends through the fourth hole section into the X-ray passing cylinder.

7. The compression device for X-ray computed tomography according to claim 6, characterized in that, Both the third and fourth hole sections are cylindrical holes. The fourth hole section has an internal thread, and the upper part of the base has an external thread. The base is threadedly installed in the fourth hole section.

8. The compression device for X-ray tomography according to claim 7, characterized in that, The base includes a first cylinder and a second cylinder arranged sequentially from top to bottom. The first cylinder has an external thread on its exterior and is threaded into the fourth hole.

9. The compression device for X-ray computed tomography according to claim 1, characterized in that, The pressure monitoring component has an upper stud and a lower stud at its upper and lower ends, respectively. The sample stage has an upper threaded hole at its lower part, and the base has a lower threaded hole. The upper stud and the lower stud are respectively installed in the upper threaded hole and the lower threaded hole.

10. The compression device for X-ray computed 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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