A mold for compression testing of high-strength materials

Abstract

This utility model discloses a mold for high-strength material compression testing, including a support module and a guiding compression module. The support module includes a supporting compression mold, a first pad, and a first positioning component. The supporting compression mold has a compression cavity, and the first pad is located within the compression cavity. The first positioning component is used to fix and adjust the radial position of the first pad. The guiding compression module includes a guiding compression mold, a second pad, and a second positioning component. The guiding compression mold has a stamping cavity, and the second pad is located within the stamping cavity. The second positioning component is used to fix and adjust the radial position of the second pad. The second pad and part of the guiding compression mold are located within the compression cavity, forming a motion guiding structure in conjunction with the supporting compression mold. The first pad and the second pad together constitute a sample fixing structure. The supporting compression mold and the guiding compression mold are coaxially arranged, and with the precise positioning component, the pad is accurately positioned, improving the mold structure accuracy and reducing eccentricity error.

Description

Technical Field

[0001] This utility model relates to the field of material compression equipment technology, and in particular to a mold for high-strength material compression experiments. Background Technology

[0002] In the field of material compression performance testing, conventional compression molds generally use integral high-strength mold steel (hardness HV700-900) as the main body of the indenter. Although it can meet the load-bearing capacity requirements to a certain extent, it has some significant technical defects.

[0003] Firstly, when testing superhard materials such as cemented carbide, composite materials, and ceramics, the local contact stress may reach over 2.5 GPa due to insufficient hardness of the indenter and the lack of effective protective measures. This high-stress state can cause obvious indentations on the working surface of the indenter, with depths exceeding 0.1 mm per thousand tests. Simultaneously, scratches may appear on the indenter surface, increasing the surface roughness Ra value by 300%, severely affecting the reusability accuracy of the mold and consequently impacting the reliability of the test data.

[0004] Secondly, in traditional rigid gasket protection schemes, the lack of a precise positioning structure often leads to coaxiality deviations in the gaskets. These deviations can cause eccentric load errors, which in turn affect the accuracy of test results, making the test data unable to truly reflect the compressive properties of the material.

[0005] Third, when brittle materials fracture during testing, the resulting fragments may fly at speeds exceeding 20 m / s. Because existing open molds lack effective fragment restraint structures, these high-speed flying fragments could cause serious injury to operators and equipment, posing a significant safety hazard. Utility Model Content

[0006] The main objective of this invention is to provide a mold for high-strength material compression experiments, thereby overcoming the shortcomings of the prior art.

[0007] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:

[0008] This utility model provides a mold for high-strength material compression testing, comprising:

[0009] A support module includes a support compression mold, a first pad block, and a first positioning component. The support compression mold has a compression cavity. The first pad block is disposed in the compression cavity. The first positioning component is used to fix the first pad block and adjust the radial position of the first pad block in the compression cavity.

[0010] A guide compression module includes a guide compression mold, a second pad block, and a second positioning component. The guide compression mold has a stamping cavity, the second pad block is disposed in the stamping cavity, and the second positioning component is used to fix the second pad block and adjust the radial position of the second pad block in the stamping cavity.

[0011] The second pad and a portion of the guide compression mold are disposed in the compression cavity. The guide compression mold and the support compression mold cooperate to form a motion guide structure that guides the support module and the guide compression module to move axially. The first pad and the second pad cooperate to form a sample fixing structure.

[0012] In a specific implementation, the supporting compression mold can be a sleeve base, the first pad can be a sleeve base pad, the first positioning component can be a sleeve base pad positioning structure, the compression mold can be a guide post compression mold, the second pad can be a guide post compression mold pad, the second positioning component can be a guide post compression mold pad positioning structure, and the protective structure can be a splash guard.

[0013] In some more specific solutions, the first positioning component includes x first positioning elements, which are spaced apart circumferentially along the supporting compression mold. The first positioning elements are movably engaged with the supporting compression mold and can be controllably moved along the compression cavity. One end of the first positioning element abuts against the first pad. The x first positioning elements form a first positioning structure that restricts the first pad from generating radial displacement, where x ≥ 2.

[0014] Furthermore, x first positioning elements are combined to form y first positioning element groups, each first positioning element group including two first positioning elements, and the two first positioning elements in each first positioning element group are mirror-symmetrically arranged, where y ≥ 1. Even further, the x first positioning elements are arranged at equal angles along the circumferential direction.

[0015] Furthermore, the diameter of the first positioning member is smaller than the thickness of the first pad, and the length L1 of the first positioning member satisfies:

[0016] L1≥1 / 2(d1-D1), where d1 is the diameter of the compression cavity and D1 is the diameter or side length of the first pad.

[0017] The first positioning element is a threaded element, and the first positioning element is threadedly connected to the supporting compression mold.

[0018] In some more specific solutions, the second positioning component includes m second positioning elements, which are spaced apart circumferentially along the guide compression mold. The second positioning elements are movably engaged with the guide compression mold and can be controllably moved along the stamping cavity. One end of the second positioning element abuts against the second pad. The m second positioning elements form a second positioning structure that restricts the second pad from generating radial displacement, where m ≥ 2.

[0019] Furthermore, m second positioning elements are combined to form n second positioning element groups. Each second positioning element group includes two second positioning elements. The two second positioning elements in each second positioning element group are mirror-symmetrically arranged, n≥1, and the m second positioning elements are arranged at equal angles along the circumference.

[0020] Furthermore, the length L2 of the second positioning member satisfies:

[0021] 1 / 2(d2-D2)≤L2≤1 / 2(d3-D2), where d2 is the diameter of the stamping cavity, d3 is the diameter of the guide compression die, and D2 is the diameter or side length of the second pad.

[0022] The second positioning element is a threaded element, and the second positioning element is threadedly connected to the guide compression mold.

[0023] In some more specific solutions, the surface roughness Ra of the upper and lower surfaces of the first pad and / or the second pad is ≤0.2μm.

[0024] The parallelism error of the upper and lower surfaces of the first pad and / or the second pad is ≤0.005mm.

[0025] The first pad and / or the second pad are cylinders or cubes.

[0026] The gap between the side wall of the guide compression mold and the side wall of the compression cavity is 0.5 to 1 mm.

[0027] The roughness Ra of the sidewall of the guide compression mold and the sidewall of the compression cavity is ≤2μm.

[0028] In some more specific embodiments, the depth of the compression cavity is less than the length of the guide compression mold in the direction of extending into the compression cavity, the support compression mold is a cylindrical base, the diameter tolerance of the compression cavity is within ±0.1mm, the roughness Ra of the compression cavity is ≤2μm, the guide compression mold is a cylindrical base, and the roughness Ra of the sidewall of the guide compression mold is ≤2μm.

[0029] In some more specific designs, the mold for high-strength material compression testing also includes a protective structure, which is disposed around the supporting compression mold. The difference between the inner diameter of the protective structure and the outer diameter of the supporting compression mold is 0.5 to 1 mm.

[0030] The support compression mold has an adjustment window for adjusting the second positioning component.

[0031] Compared with the prior art, the advantages of this utility model include at least the following:

[0032] First, the high-strength material compression test mold provided by this utility model, with the use of a supporting compression mold, a guiding compression mold, and a detachable pad, combined with the application of high-strength mold steel and superhard materials, significantly enhances the hardness and deformation resistance of the pad. This structure makes the stress distribution of the sample more uniform during compression, thereby improving the accuracy and reliability of experimental data.

[0033] Secondly, the high-strength material compression test mold provided by this utility model has a support compression mold and a guide compression mold arranged coaxially, and with the help of a precise positioning component, it ensures the accurate positioning of the pad and the effective control of eccentric error, which significantly improves the structural accuracy of the mold, reduces eccentric error, and further improves the accuracy of the experiment and the uniformity of the stress distribution of the sample.

[0034] Third, the high-strength material compression test mold provided by this utility model is equipped with a protective structure, which can effectively reduce the risk of fragments flying due to material fracture during brittle material compression tests, thereby greatly improving the safety of the experiment and the reliability of the data. Attached Figure Description

[0035] Figure 1 This is a cross-sectional view of a high-strength material compression test mold according to an embodiment of the present invention;

[0036] Figure 2 This is a top view of a high-strength material compression test mold according to an embodiment of the present invention;

[0037] Figure 3 This is a top view of another high-strength material compression test mold according to an embodiment of the present invention;

[0038] Figure 4 This is a top view of another high-strength material compression test mold according to an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of the sleeve base according to an embodiment of the present utility model;

[0040] Figure 6This is a top view of another high-strength material compression test mold according to an embodiment of this utility model. Attached image description:

[0042] 1. Sleeve base; 2. Sleeve base pad; 3. Sleeve base pad positioning structure; 4. Guide post molding; 5. Guide post molding pad; 6. Guide post molding pad positioning structure; 7. Splash guard. Detailed Implementation

[0043] In view of the shortcomings of the prior art, the inventor of this case, through long-term research and extensive practice, has come up with the technical solution of this utility model. The following will further explain the technical solution, its implementation process, and its principles.

[0044] Please refer to Figure 1 one Figure 2 A high-strength material compression test mold specifically includes: a sleeve base 1, a sleeve base pad 2, a sleeve base pad positioning structure 3, a guide post mold 4, a guide post mold pad 5, and a guide post mold pad positioning structure 6. The sleeve base 1 and the guide post mold 4 are coaxially arranged.

[0045] The sleeve base 1 is a cylindrical base made of easily machinable high-strength mold steel with a smooth surface. A groove is formed at the top of the sleeve base 1, serving as a compression cavity. The sleeve base pad 2 is placed at the bottom of the compression cavity and is fixedly connected to the sleeve base 1 by the sleeve base pad positioning structure 3. The sleeve base pad positioning structure 3 ensures that the center of the sleeve base pad 2 is coaxially aligned with the sleeve base 1 and the guide column mold 4, thereby guaranteeing the accuracy of the compression experiment.

[0046] The guide post mold 4 is also a cylindrical base, made of easily machinable high-strength mold steel with a smooth surface. One end of the guide post mold 4, the end that enters the compression cavity, has a groove, i.e., a stamping cavity. The guide post mold pad 5 is placed inside the stamping cavity and is fixedly connected to the guide post mold 4 via the guide post mold pad positioning structure 6. The center of the guide post mold pad 5 must also be coaxially aligned with the sleeve base 1 and the guide post mold 4 to ensure the accuracy of the experiment.

[0047] A gap of 0.5–1 mm is maintained between the outer side of the guide post mold 4 and the side wall of the compression cavity. This allows the guide post mold 4 to enter and exit the compression cavity while remaining coaxial with the sleeve base 1. The depth of the compression cavity is less than the length of the guide post mold 4 in the direction of its insertion into the compression cavity. When the guide post mold 4 needs to be disassembled, since the length of the inserted section of the guide post mold 4 is greater than the depth of the compression cavity, its top end will naturally protrude from the opening end of the compression cavity. This results in less resistance and smoother movement during the upward lifting of the guide post mold 4, effectively reducing the operational difficulty during mold maintenance or replacement and significantly improving the efficiency of tooling disassembly.

[0048] Before the compression test begins, the material to be compressed is placed between the sleeve base pad 2 and the guide post compression mold pad 5. When the test begins, the guide post compression mold 4 presses down on the sleeve base pad 2, and the pressure is transmitted to the guide post compression mold pad 5, thereby performing a compression operation on the material to be compressed sandwiched in between.

[0049] In this design, the outer diameter of the sleeve base 1 is 60mm, the inner diameter is 41mm, and the height is 80mm. This means the inner diameter of the compression cavity is 41mm. The bottom of the compression cavity is 10mm below the bottom of the sleeve base 1, i.e., the solid height inside the sleeve base 1. To ensure the accuracy of the compression cavity, its diameter tolerance is controlled within ±0.01mm. Furthermore, the surface roughness Ra of the compression cavity is ≤2μm. For the guide post die 4, the outer diameter is 40mm, the height is 80mm, and the roughness of its sidewalls is also Ra≤2μm. The inner diameter of the stamping cavity of the guide post die 4 is 30mm, and the depth is 8mm.

[0050] Please refer to Figure 1 , Figure 3 In this design, the sleeve base pad positioning structure 3 includes an internal thread and four adjustable positioning screws with a diameter of 5mm. The distance from the center of the threaded hole to the bottom plane of the sleeve base is 14mm. The specific logic behind this dimension is that the thickness of the sleeve base pad positioning structure 3 is the sum of half the thickness of the sleeve base pad 2. It is important to note that during the positioning process, the screws only need to abut against the surface of the sleeve base pad 2 to complete the positioning; they do not need to penetrate into the sleeve base pad 2, thus ensuring the reliability and rationality of the structural connection.

[0051] These adjustable positioning screws are used to securely connect the sleeve base pad 2 to the sleeve base 1, ensuring coaxial alignment. Specifically, the four adjustable positioning screws are combined into two groups, intersecting each other in a cross shape. Each group contains two adjustable positioning screws, and the two screws in the same group are distributed on the same straight line. This design ensures a more stable connection between the sleeve base pad 2 and the sleeve base 1 during adjustment.

[0052] Regarding dimensions, the diameter of the adjustable positioning screw is smaller than the thickness of the sleeve base pad 2 to ensure that the screw can be fully embedded inside the pad. The length L1 of the adjustable positioning screw needs to satisfy: L1≥1 / 2(d1-D1), where d1 is the diameter of the sleeve base 1 and D1 is the diameter or side length of the sleeve base pad 2. This design ensures that the sleeve base pad 2 maintains a good fit with the sleeve base 1 during compression.

[0053] In the specific design, the inner diameter of the compression cavity is 41mm, and the length L1 of the adjustable positioning screw needs to meet the following condition: L1≥1 / 2(60-D1), where D1 is the diameter or side length of the sleeve base pad 2.

[0054] Please refer to Figure 2 In this design, the guide post molding pad positioning structure 6 includes internal threads and four adjustable positioning capless hexagonal socket head cap screws, each 5mm in diameter, used to securely connect the guide post molding pad 5 and the guide post molding 4, ensuring coaxial alignment. Specifically, the center of the threaded hole in the guide post molding pad positioning structure 6 is 4mm from the bottom plane of the sleeve base. The four adjustable positioning capless hexagonal socket head cap screws are combined into two groups, with the two groups arranged in a cross shape. Each group includes two adjustable positioning capless hexagonal socket head cap screws, and the two screws in the same group are aligned in a straight line. This design ensures a more stable connection between the guide post molding pad 5 and the guide post molding 4 during adjustment.

[0055] Regarding dimensions, the length L2 of the adjustable, capless hex socket screw must meet the following requirements:

[0056] 1 / 2(d2-D2)≤L2≤1 / 2(d3-D2), where d2 is the diameter of the stamping cavity, d3 is the diameter of the guide post die 4, and D2 is the diameter or side length of the guide post die pad 5. In the design and assembly of the adjustable positioning capless hex socket screw: if the screw length is too short, its tip cannot effectively abut against the guide post die pad 5, resulting in positioning failure; if the screw length is too long, its end will protrude beyond the outer surface of the guide post die 4, causing assembly interference and ultimately preventing the guide post die 4 from being successfully assembled into the sleeve base 1. Therefore, the screw length parameter needs to be precisely controlled to meet the bidirectional assembly requirements.

[0057] In the specific design, the inner diameter of the stamping cavity is 30mm, and the outer diameter of the guide post die 4 is 40mm.

[0058] The length L2 of the adjustable positioning capless hex socket screw needs to meet specific conditions, namely:

[0059] 1 / 2(30-D2)≤L2≤1 / 2(40-D2), where D2 is the diameter or side length of the guide post molding pad 5.

[0060] In this design, the sleeve base pad 2 and the guide post molding pad 5 can be round or square, but are not limited to these two shapes. The diameter or side length is 30mm, and the thickness is greater than or equal to 8mm. The surfaces of the sleeve base pad 2 and the guide post molding pad 5 are smooth, with a roughness Ra≤0.2μm on the upper and lower surfaces. At the same time, it is ensured that the upper and lower surfaces are parallel, and the parallelism error shall not exceed 0.005mm.

[0061] When performing compression, the diameter or side length of the material to be compressed must be smaller than the diameter or side length of the sleeve base pad 2 and the guide column compression pad 5, i.e., less than 30mm.

[0062] In a preferred embodiment, the thickness of the guide post molding pad 5 is greater than or equal to the depth of the stamping cavity to ensure that the material to be compressed is in close contact with the sleeve base pad 2 and the guide post molding pad 5. Furthermore, the length of the guide post molding pad positioning structure 6 is less than or equal to the length between the sidewall of the stamping cavity and the outer wall of the guide post molding 4. The materials of the sleeve base pad 2 and the guide post molding pad 5 can include, but are not limited to, hard materials such as tungsten carbide, alumina ceramic, zirconia ceramic, titanium diboride, and silicon carbide.

[0063] Please refer to Figure 4 This solution also includes a splash guard 7, which may be made of stainless steel, but is not limited to. The splash guard 7 has an outer diameter of 70 mm, an inner diameter of 61 mm, and a height of 75 mm. To ensure that the splash guard 7 can be effectively fitted around the sleeve base 1, its inner diameter is 0.5 to 1 mm larger than the outer diameter of the sleeve base 1. This arrangement can achieve a debris capture efficiency of ≥99.5%.

[0064] Please refer to Figures 5-6 The sleeve base 1 is provided with an adjustment window for adjusting the guide column pressure mold pad positioning structure 6.

[0065] The following describes the assembly process of a mold for a high-strength material compression test. The specific steps are as follows:

[0066] First, inspect the sleeve base pad 2 and the guide column compression pad 5 to ensure that their surface flatness and roughness meet the compression requirements;

[0067] Subsequently, the sleeve base pad 2 and the guide post molding pad 5 are placed into the compression cavity of the sleeve base 1 in sequence; then, the guide post molding 4 is inserted into the compression cavity of the sleeve base 1. At this time, in the compression cavity of the sleeve base 1, the compression end face of the guide post molding 4 is in contact with the guide post molding pad 5, the guide post molding pad 5 is in contact with the sleeve base pad 2, and the sleeve base pad 2 is in close contact with the bottom of the sleeve base 1.

[0068] Then, the sleeve base pad 2 is fixed to the sleeve base 1 using the sleeve base pad positioning structure 3, and the guide post molding pad 5 is fixed to the guide post molding 4 using the guide post molding pad positioning structure 6. During the fixing process, the positions of the sleeve base pad 2 and the guide post molding pad 5 need to be adjusted to ensure that their centers are located on the central axes of the sleeve base 1 and the guide post molding 4, respectively, and that the central axes of the sleeve base 1 and the guide post molding 4 are completely coaxially aligned. At the same time, the guide post molding 4 should fit tightly against the side wall contact surface of the sleeve base 1. Finally, the splash guard 7 is fitted over the sleeve base 1.

[0069] Next, we will introduce the usage process of a mold for high-strength material compression experiments, namely the compression process:

[0070] First, place the assembled high-strength material compression test mold at the center of the indenter of the mechanical testing machine, ensuring that the center of the indenter is aligned with the coaxial line of the sleeve base 1 and the guide column mold 4;

[0071] Then, remove the guide column mold 4 from the compression chamber of the sleeve base 1 from above, and place the sample to be compressed on the sleeve base pad 2 with tweezers, ensuring that the sample to be compressed is located at the center of the sleeve base pad 2.

[0072] Then, the guide post mold 4 is slowly inserted into the compression chamber of the sleeve base 1 from above. This slow insertion is to prevent the sample to be compressed from shifting laterally or tipping over.

[0073] Next, the pressure head of the mechanical testing machine is moved down until it is about 0.1 mm away from the stamping end face of the guide post die 4, and then the downward movement is stopped.

[0074] Based on the compression test parameters, initiate the mechanical test, compress the sample to be compressed, and obtain the compressed finished product.

[0075] After the test is completed, lift the pressure head of the mechanical testing machine, and then take out the guide column mold 4 and the compressed finished product in sequence;

[0076] Finally, clean the surfaces of the sleeve base pad 2 and the guide column compression pad 5 to ensure cleanliness, thus completing the entire compression test process.

[0077] In summary, this utility model discloses a pressure-adjustable mold for high-strength material compression experiments, particularly suitable for high-hardness materials. Firstly, the use of a sleeve base, guide post mold, and removable pad, combined with high-strength mold steel and ultra-hard material pads, significantly enhances the hardness and deformation resistance of the pads. This structure results in a more uniform stress distribution during sample compression, thereby improving the accuracy and reliability of experimental data. Secondly, the coaxial arrangement of the guide post mold and sleeve base, along with precise positioning screws, ensures accurate positioning of the pads and effective control of eccentricity errors, significantly improving the structural accuracy of the mold, reducing eccentricity errors, and further enhancing experimental accuracy and the uniformity of sample stress distribution. Furthermore, the modular anti-damage design not only reduces mold maintenance costs but also effectively reduces local stress concentration through a three-dimensional stress dispersion structure, thus extending the mold's service life. Finally, it is equipped with a splash guard 7, which effectively reduces the risk of fragmentation during brittle material compression experiments due to material fracture, thereby greatly improving experimental safety and data reliability.

[0078] It should be understood that the above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A mold for high-strength material compression testing, characterized in that, include: A support module includes a support compression mold, a first pad block, and a first positioning component. The support compression mold has a compression cavity. The first pad block is disposed in the compression cavity. The first positioning component is used to fix the first pad block and adjust the radial position of the first pad block in the compression cavity. A guide compression module includes a guide compression mold, a second pad block, and a second positioning component. The guide compression mold has a stamping cavity, the second pad block is disposed in the stamping cavity, and the second positioning component is used to fix the second pad block and adjust the radial position of the second pad block in the stamping cavity. The second pad and a portion of the guide compression mold are disposed in the compression cavity. The guide compression mold and the support compression mold cooperate to form a motion guide structure that guides the support module and the guide compression module to move axially. The first pad and the second pad cooperate to form a sample fixing structure.

2. The mold for high-strength material compression testing according to claim 1, characterized in that, The first positioning component includes x first positioning elements, which are spaced apart circumferentially along the supporting compression mold. The first positioning elements are movably engaged with the supporting compression mold and can be controllably moved along the compression cavity. One end of the first positioning element abuts against the first pad. The x first positioning elements form a first positioning structure that restricts the first pad from generating radial displacement, where x ≥ 2.

3. The mold for high-strength material compression testing according to claim 2, characterized in that, x first positioning elements are combined to form y first positioning element groups. Each first positioning element group includes two first positioning elements, and the two first positioning elements in each first positioning element group are arranged in a mirror-symmetric manner, where y ≥ 1. And / or, x first positioning elements are set at equal angles along the circumference.

4. The mold for high-strength material compression testing according to claim 2, characterized in that, The diameter of the first positioning member is smaller than the thickness of the first pad, and the length L1 of the first positioning member satisfies: L1≥1 / 2(d1-D1), where d1 is the diameter of the compression cavity and D1 is the diameter or side length of the first pad. And / or, the first positioning element is a threaded element, and the first positioning element is threadedly connected to the supporting compression mold.

5. The mold for high-strength material compression testing according to claim 1, characterized in that, The second positioning component includes m second positioning elements, which are spaced apart circumferentially along the guide compression mold. The second positioning elements are movably engaged with the guide compression mold and can be controllably moved along the stamping cavity. One end of the second positioning element abuts against the second pad. The m second positioning elements form a second positioning structure that restricts the second pad from generating radial displacement, where m ≥ 2.

6. The mold for high-strength material compression testing according to claim 5, characterized in that, m second positioning elements are combined to form n second positioning element groups. Each second positioning element group includes two second positioning elements, and the two second positioning elements in each second positioning element group are arranged in a mirror-symmetric manner, where n≥1. And / or, m second positioning elements are set at equal angles along the circumference.

7. The mold for high-strength material compression testing according to claim 5, characterized in that, The length L2 of the second positioning member satisfies: 1 / 2(d2-D2)≤L2≤1 / 2(d3-D2), where d2 is the diameter of the stamping cavity, d3 is the diameter of the guide compression die, and D2 is the diameter or side length of the second pad. And / or, the second positioning element is a threaded element, and the second positioning element is threadedly connected to the guide compression mold.

8. The mold for high-strength material compression testing according to claim 1, characterized in that, The surface roughness Ra of the upper and lower surfaces of the first pad and / or the second pad is ≤0.2μm. And / or, the parallelism error of the upper and lower surfaces of the first pad and / or the second pad is ≤0.005mm. And / or, the first pad and / or the second pad are cylinders or cuboids. And / or, the gap between the sidewall of the guide compression mold and the sidewall of the compression cavity is 0.5–1 mm. And / or, the roughness Ra of the sidewall of the guide compression mold and the sidewall of the compression cavity is ≤2μm.

9. The mold for high-strength material compression testing according to claim 1, characterized in that, The depth of the compression cavity is less than the length of the guide compression mold in the direction extending into the compression cavity. And / or, the supporting compression mold is a cylindrical base, the diameter tolerance of the compression cavity is within ±0.1mm, and the roughness Ra of the compression cavity is ≤2μm; And / or, the guide compression mold is a cylindrical base, and the roughness Ra of the sidewall of the guide compression mold is ≤2μm.

10. The mold for high-strength material compression testing according to claim 1, characterized in that, It also includes a protective structure, which is disposed around the supporting compression mold. And / or, the difference between the inner diameter of the protective structure and the outer diameter of the supporting compression mold is 0.5–1 mm. And / or, the supporting compression mold is provided with an adjustment window for adjusting the second positioning component.

Images