Detection clamp for opening compression

Abstract

The utility model discloses an open pore compression detection clamp which comprises two clamping parts which are arranged in a central symmetry mode, a fixing groove and at least one sliding groove are formed in each clamping part and distributed in the first direction, a sample to be detected is arranged in each fixing groove, and the first direction is parallel to the width direction of the sample to be detected; the adjusting part is arranged in the sliding groove and used for adjusting the size of the fixing groove in the first direction. A to-be-detected sample is stably clamped by the two clamping parts which are arranged in a central symmetry mode, the size of the fixing groove in the first direction is adjusted through the adjusting part, so that the adjusting part is connected with the to-be-detected sample to adapt to the to-be-detected samples of different sizes, and it is ensured that the placing positions of the samples are accurate in the detection process; therefore, the reliability and accuracy of detection are improved, the process that different clamps need to be replaced due to the size difference of the samples is avoided, the detection efficiency is improved, various clamps with different sizes do not need to be prepared, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of testing and detection, in particular to an opening compression detection fixture. Background Art

[0002] Carbon fiber has excellent strength and high stiffness properties, but it loses significant strength when a hole is cut. In practical use, composite parts often require holes to connect to other components. Therefore, composite materials used in aircraft must be evaluated using tests on specimens with a hole cut through the center.

[0003] The open hole compression test fixtures currently in use are generally manufactured by a third party (mold factory) commissioned by the testing machine manufacturer. Generally, one open hole compression test fixture can only be applied to carbon fiber of one width and size and is not compatible with various models and sizes. As a result, laboratories routinely prepare at least two sets of open hole compression test fixtures to facilitate the testing of open hole compression of various sizes. However, the utilization rate is not high, which greatly wastes the laboratory's funds and resources. In addition, the open hole compression test fixture is extremely prone to various losses due to improper operation during the disassembly / testing process. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a detection fixture for opening compression.

[0005] The utility model provides a detection fixture for opening and compressing a hole, comprising:

[0006] Two clamping parts are arranged in a centrally symmetrical manner, wherein a fixed groove and at least one slide groove are provided in the clamping parts, wherein the fixed groove and at least one slide groove are arranged along a first direction, and the sample to be tested is set in the fixed groove, wherein the first direction is parallel to the width direction of the sample to be tested;

[0007] an adjusting portion, disposed on the sliding groove, and configured to adjust a size of the fixing groove in the first direction;

[0008] During the test, the side of the sample to be tested is connected to the adjustment part.

[0009] In some embodiments of the present disclosure, the clamping portion includes a first clamping member and a second clamping member, the second clamping member is covered on a first side surface of the first clamping member, the first clamping member and the second clamping member are connected by a first fastener, and the first fastener sequentially passes through the first clamping member and the second clamping member along the stacking direction of the first clamping member and the second clamping member;

[0010] The sliding groove is formed by partially recessing a surface of the first side surface of the first clamping member.

[0011] In some embodiments of the present disclosure, the adjustment portion includes a slider, and the slider is disposed in the slide groove;

[0012] Along the first direction, an adjusting member is provided between each of the sliders and the corresponding groove wall of the sliding groove, and two adjusting members are connected to an adjusting switch, and the adjusting switch is used to control the rotation of the adjusting member;

[0013] When the adjustment switch is in the first state, the length direction of the adjustment member is perpendicular to the length direction of the slider, and the adjustment member is used to push the slider out of the slide groove;

[0014] When the adjustment switch is in the second state, the length direction of the adjustment member is parallel to the length direction of the slider.

[0015] In some embodiments of the present disclosure, a stretching member is further provided between each of the sliders and the corresponding groove wall of the sliding groove along the first direction;

[0016] When the regulating switch is in the second state, the stretching member is used to pull the slider back into the sliding groove.

[0017] In some embodiments of the present disclosure, a third through hole corresponding to the adjustment switch is further provided on the second clamping member, and the adjustment switch is passed through the third through hole.

[0018] In some embodiments of the present disclosure, the first clamping member includes a first clamping plate and a second clamping plate connected, the first clamping plate being located between the second clamping plate and the second clamping member;

[0019] The second clamping plate is provided with an observation hole, and the punching position of the sample to be tested is located in the observation hole.

[0020] In some embodiments of the present disclosure, the thickness of the second clamping plate is smaller than the thickness of the first clamping plate, and the outer surface of the second clamping plate is flush with the bottom surface of the fixing groove.

[0021] In some embodiments of the present disclosure, the clamping portion further includes a fixing plate;

[0022] The fixing plate is provided with a fourth through hole, the first clamping member is provided with a fifth through hole adapted to the fourth through hole, the second clamping member is provided with a sixth through hole adapted to the fourth through hole, and a second fastener is provided in the fourth through hole, the fifth through hole, and the sixth through hole;

[0023] The fixing plate is used to fix the connection between the second clamping piece of one clamping part and the second clamping plate of another clamping part.

[0024] In some embodiments of the present disclosure, a magnetic triangle seat is provided on a side of each of the first clamping plate away from the second clamping plate and a side of the second clamping plate away from the first clamping plate.

[0025] In some embodiments of the present disclosure, the width of the fixing groove is 37.4-38.6 mm.

[0026] The detection fixture for opening compression provided by the utility model has at least the following advantages:

[0027] The open-hole compression detection fixture provided by the utility model can stably clamp the sample to be detected through two clamping parts arranged symmetrically with respect to the center. The sample to be detected is set in the fixed groove, and the size of the fixed groove in the first direction is adjusted by the adjustment part, so that the adjustment part is connected to the sample to be detected to adapt to samples to be detected of different sizes, ensuring that the sample is accurately placed in the detection process, thereby improving the reliability and accuracy of the detection, and avoiding the process of replacing different clamps due to differences in sample sizes, thereby improving the detection efficiency, and eliminating the need to prepare multiple clamps of different sizes, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 work.

[0029] Figure 1 A schematic structural diagram of the entire opening compression detection fixture provided by an exemplary embodiment of the present invention from a first perspective;

[0030] Figure 2 A schematic structural diagram of the overall opening compression detection fixture provided by an exemplary embodiment of the present invention from a second perspective;

[0031] Figure 3 A schematic structural diagram of an adjustment switch provided by an exemplary embodiment of the present utility model when the adjustment switch is in a first state;

[0032] Figure 4 This is a structural diagram of an exemplary embodiment of the present invention when the regulating switch is in the second state.

[0033] The following are marked in the accompanying drawings:

[0034] 1. First clamping member; 101. Fixing slot; 102. Sliding slot; 103. First clamping plate; 104. Second clamping plate; 114. Observation hole; 105. Fifth through hole; 106. First through hole;

[0035] 2. Second clamping piece; 3. First fastener; 4. Slider; 5. Adjustment piece; 6. Adjustment switch; 7. Stretching piece; 8. Fixing plate; 9. Second fastener; 10. Magnetic triangle seat. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying 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 embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without inventive efforts shall fall within the scope of protection of the present invention.

[0037] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] Carbon fiber reinforced plastics (CFRPs), with their high strength and light weight, are widely used in aerospace. While carbon fiber possesses excellent strength and high stiffness, it suffers from significant strength loss when holes are cut. Composite parts often require holes to connect to other components. Therefore, composite materials used in aircraft must be evaluated using tests on specimens with a single hole cut through the center.

[0039] The open hole compression test fixtures currently in use are generally manufactured by a third party (mold factory) commissioned by the testing machine manufacturer. Generally, one open hole compression test fixture can only be applied to carbon fiber of one width and size, and is not compatible with various models and sizes. As a result, laboratories routinely prepare at least two sets of open hole compression test fixtures to facilitate the testing of open hole compression of various sizes. However, the utilization rate is not high, which greatly wastes the laboratory's funds and resources. In addition, during the disassembly and assembly / testing process of the open hole compression test fixture, various losses are extremely likely to occur due to improper operation, which greatly wastes the laboratory's funds and resources.

[0040] The following combination Figure 1-Figure 4 The embodiments of the present invention are further described.

[0041] In order to solve the above technical problems, the utility model provides an open-hole compression detection fixture, which can stably clamp the sample to be tested through two centrally symmetrically arranged clamping parts, and set the sample to be tested in the fixed groove. The size of the fixed groove in the first direction is adjusted by the adjustment part to better adapt to samples of various sizes to be tested, ensuring the position accuracy of the sample during the detection process, thereby improving the reliability and accuracy of the detection, and at the same time avoiding the tedious process of replacing different fixtures due to differences in sample sizes, reducing the need to purchase multiple fixtures of different sizes, thereby saving costs and improving detection efficiency.

[0042] An exemplary embodiment of the present disclosure provides a detection fixture for opening compression, such as Figure 1 and Figure 2 As shown, it includes two clamping parts and an adjusting part. The two clamping parts are arranged symmetrically with respect to the center. A fixing groove 101 and at least one slide groove 102 are arranged in the clamping part. The fixing groove 101 and at least one slide groove 102 are arranged along the first direction. The sample to be tested is set in the fixing groove 101. The first direction is parallel to the width direction of the sample to be tested. The adjusting part is set in the slide groove 102. The adjusting part is used to adjust the size of the fixing groove 101 in the first direction. During the test, the side of the sample to be tested is connected to the adjusting part. Figure 3 and Figure 4 In this embodiment, two slide grooves 102 are provided. Along the first direction, one slide groove 102 is provided on each of the left and right sides of the fixed groove 101. Adjustment portions within the two slide grooves 102 simultaneously adjust the width of the fixed groove 101. Thus, by moving the adjustment portions within the slide grooves 102, the width of the fixed groove 101 can be conveniently adjusted, allowing the adjustment portions to connect with the test specimens to be tested, thereby accommodating test specimens of varying widths. This allows the fixture to be used with test specimens of various specifications, thereby improving the fixture's versatility and flexibility. After the adjustment portions are adjusted to the appropriate position, they can securely clamp the test specimens to prevent them from slipping or shifting during the test, helping to ensure the accuracy and reliability of the test results. This also avoids the tedious process of replacing different fixtures due to differences in sample size, improving testing efficiency, and eliminating the need to prepare multiple fixtures of different sizes, thereby saving costs.

[0043] It should be noted that the principle of open-hole compression testing involves conducting a uniaxial compression test on a symmetrical, balanced laminate containing a central hole. The carbon fiber pressboard specimen with the central hole is placed in a test fixture, ensuring that the fixture can securely grip the carbon fiber pressboard specimen and transmit the load. The load is then introduced by applying force to the end of the fixture via the test machine's pressure plate. The test machine is then activated to load the specimen while simultaneously recording its deformation and failure. After the test, the recorded data is processed and analyzed to calculate the open-hole compression strength.

[0044] In some embodiments of the present invention, referring to Figure 1 and Figure 2 The clamping portion includes a first clamping member 1 and a second clamping member 2. The second clamping member 2 is covered on the first side surface of the first clamping member 1. The first clamping member 1 and the second clamping member 2 are connected by a first fastener 3. The first fastener 3 sequentially penetrates the first clamping member 1 and the second clamping member 2 along the stacking direction of the first clamping member 1 and the second clamping member 2. The slide groove 102 is formed by a partial surface depression of the first side surface of the first clamping member 1. For example, four first through holes 106 are provided on the first clamping member 1, and four second through holes adapted to the first through holes 106 are provided on the second clamping member 2. The first fastener 3 sequentially penetrates the first through holes 106 and the second through holes along the stacking direction of the first clamping member 1 and the second clamping member 2. The first clamping member 1 and the second clamping member 2 are made of 304 steel with a wavy texture to increase internal friction and provide corrosion, dust, rust, and erosion resistance. The first fastener 3 includes a quick-release nut and bolt, which are commonly available on the market, with dimensions of 75-85mm*φ7.5-8.5mm, and made of stainless steel. Thus, by forming the groove 102 through the depression, the necessary space for the adjustment portion can be provided without increasing the overall size of the fixture, reducing the complexity and manufacturing difficulty of the fixture, making the fixture manufacturing process simpler and more efficient, and helping to reduce manufacturing costs. The second clamping member 2 is disposed on the first side surface of the first clamping member 1 and is connected by the first fastener 3, increasing the contact area between the two, allowing for stronger clamping force and better stability, helping to prevent the specimen from sliding or deflecting during the test.

[0045] In some embodiments of the present invention, referring to Figure 1 、 Figure 3 and Figure 4 The adjustment portion includes a slider 4, which is arranged in the slide groove 102. Along the first direction, an adjustment member 5 is provided between each slider 4 and the groove wall of the corresponding slide groove 102. The two adjustment members 5 are connected to an adjustment switch 6, which is used to control the rotation of the adjustment member 5; wherein, the adjustment member 5 includes a cam. The adjustment member 5 can change the relationship between its length direction and the length direction of the slider 4 by rotating, thereby achieving adjustment in different directions. By adjusting the rotation angle of the adjustment member 5, the position of the slider 4 can be fine-tuned, thereby changing the width of the fixed groove 101. Figure 3 When the adjustment switch 6 is in the first state, the length direction of the adjustment member 5 is perpendicular to the length direction of the slider 4, and the adjustment member 5 is used to push the slider 4 out of the slide groove 102. Figure 4 When the adjustment switch 6 is in the second state, the length direction of the adjustment member 5 is set parallel to the length direction of the slider 4.

[0046] For example, referring to Figure 3 , the upper part of the adjustment switch 6 is rotatably connected to the first end of the connecting member, the second end of the connecting member is rotatably connected to the upper end of the left adjustment member 5, the lower part of the adjustment switch 6 is rotatably connected to the first end of another connecting member, and the second end of the other connecting member is rotatably connected to the lower end of the right adjustment member 5. For example, the width of the fixing groove 101 is 38mm. When a sample with a width of 36mm needs to be tested, refer to Figure 3 , then turn the adjustment switch 6 in the clockwise direction to set the length direction of the adjustment member 5 perpendicular to the length direction of the slider 4, and then push the slider 4 out of the slide groove 102 and into the fixed groove 101, so that the width of the fixed groove 101 is controlled to 36mm; when it is necessary to test a sample with a width of 38mm, refer to Figure 4 , then rotate the adjustment switch 6 in a counterclockwise direction so that the length direction of the adjustment member 5 is set parallel to the length direction of the slider 4, so that the entire slider 4 is located in the slide groove 102. Of course, when it is necessary to detect specimens of other widths, the position of the slider 4 can be fine-tuned by adjusting the rotation angle of the adjustment member 5. In this way, by simply rotating the adjustment switch 6, the width of the fixed groove 101 can be quickly adjusted to accommodate specimens of different widths, making the detection fixture highly flexible and the detection process more convenient. Compared with the method of purchasing multiple fixtures of different sizes to accommodate specimens of different widths, this adjustment mechanism provides a more cost-effective solution.

[0047] In some embodiments of the present invention, referring to Figure 1 、 Figure 3 and Figure 4 Along the first direction, a tensioning member 7 is disposed between each slider 4 and the corresponding wall of the chute 102; the tensioning member 7 comprises a tension spring. When the adjustment switch 6 is in the second position, the tensioning member 7 is used to pull the slider 4 back into the chute 102. This tensioning spring automatically pulls the slider 4 back into the chute 102, eliminating the need for manual resetting. This greatly simplifies the operation process and improves work efficiency. The user simply adjusts the adjustment switch 6 to extend and retract the slider 4, eliminating the need for complex operations or adjustments, and eliminating the need for additional resetting mechanisms or devices, thus reducing manufacturing and maintenance costs.

[0048] In some embodiments of the present invention, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4The second clamping member 2 is also provided with a third through-hole corresponding to the adjustment switch 6, and the adjustment switch 6 is inserted into the third through-hole. When the second clamping member 2 is placed on the first clamping member 1, the adjustment switch 6 can be exposed to the outside through the third through-hole, making it convenient for the user to adjust the width of the fixing slot 101. In this way, the adjustment switch 6 is exposed to the outside through the third through-hole, and the user can intuitively see and easily access it without having to disassemble or move other components to operate it. In addition, after the adjustment switch 6 passes through the third through-hole, it can, to a certain extent, fix the second clamping member 2 and the first clamping member 1, thereby enhancing the structural stability of the entire detection fixture.

[0049] In some embodiments of the present invention, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The first clamping member 1 includes a first clamping plate 103 and a second clamping plate 104, with the first clamping plate 103 located between the second clamping plate 104 and the second clamping member 2. The second clamping plate 104 is provided with an observation hole 114, and the punching position of the sample to be tested is located in the observation hole 114. For example, during use, the two ends of the fiber to be tested are fixed by a clamping portion respectively, so that the punching position of the fiber to be tested is located at the observation hole 114. In this way, when the end of the clamp is pressurized by the test machine pressure plate, the state of the fiber to be tested can be observed through the observation hole 114, and test data can be obtained in a timely manner, thereby improving the accuracy and reliability of the test.

[0050] In some embodiments of the present invention, referring to Figure 1 and Figure 2 , the thickness of the second clamping plate 104 is less than that of the first clamping plate 103, and the outer surface of the second clamping plate 104 is flush with the bottom surface of the fixing groove 101. Figure 1 After the two clamping parts are assembled together, the second clamping plate 104 of the upper clamping part is aligned with the second clamping plate 104 of the lower clamping part, and the end of the second clamping plate 104 of the upper clamping part abuts the end surface of the lower second clamping member 2 and a portion of the end surface of the lower first clamping member 1, while the end of the second clamping plate 104 of the lower clamping part abuts the end surface of the upper second clamping member 2 and a portion of the end surface of the upper first clamping member 1. Thus, when the two clamping parts are assembled together, the second clamping plate 104 of the upper clamping part is aligned with the second clamping plate 104 of the lower clamping part, forming an interlocking structure, which increases the stability of the clamp as a whole and prevents the clamp from loosening or deformation during the pressurization process. The outer surface of the second clamping plate 104 is flush with the bottom surface of the fixing groove 101, so that the fiber to be tested in the assembled test fixture is always in a horizontal position. The horizontal position of the fiber to be tested can more evenly distribute pressure when subjected to force, avoiding errors caused by improper positioning, and helping to ensure the accuracy and reliability of the test results.

[0051] In some embodiments of the present invention, referring to Figure 1 and Figure 2 The clamping part also includes a fixing plate 8; wherein, the material of the fixing plate 8 is 304 steel with wavy lines to enhance the anti-corrosion, dustproof, rustproof and anti-corrosion effects. Two fourth through holes are provided on the fixing plate 8, the first clamping member 1 is provided with a fifth through hole 105 adapted to the fourth through hole, the second clamping member 2 is provided with a sixth through hole adapted to the fourth through hole, and second fasteners 9 are provided in the fourth through hole, the fifth through hole 105 and the sixth through hole; the fixing plate 8 is used to fix the connection between the second clamping member 2 of one clamping part and the second clamping plate 104 of the other clamping part. The second fastener 9 can be a quick-release nut and bolt, which can be a common model on the market, with a size of 75~85mm*φ7.5~8.5mm, and made of stainless steel.

[0052] Thus, by passing the second fastener 9 through the fourth through-hole, the fifth through-hole 105, and the sixth through-hole, an interlocking connection is further achieved between the two clamping parts, improving the overall stability of the clamp and preventing loosening or deformation of the clamp during the pressurization process. The fixing plate 8 can firmly connect the second clamping member 2 and the second clamping plate 104 of the two clamping parts together, enhancing the overall structural stability of the clamp, preventing loosening or deformation during pressurization or testing, and thus improving the accuracy and reliability of the test.

[0053] In some embodiments of the present invention, referring to Figure 1 and Figure 2 , a magnetic triangular seat 10 is provided on each side of the first plywood 103 away from the second plywood 104 and on the side of the second plywood 104 away from the first plywood 103. For example, the shape of the magnetic triangular seat 10 is a metal acute-angled triangle base, with angles of 30°, 60°, and 90°, respectively, and dimensions of 50±1mm, 86.6±1mm, and 100±1mm, respectively, where: 50±1mm is the bottom side, 86.6±1mm is the vertical side, and 100±1mm is the hypotenuse. Providing a triangular seat with a magnetic adsorption function on the clamping part can prevent side slipping and tipping during the detection process, which is beneficial to the overall stability of the test.

[0054] In some embodiments of the present invention, referring to Figure 3 and Figure 4 The width of the fixing groove 101 is 37.4-38.6 mm. For example, in Example 1, the average thickness of the test sample is 4.66 mm, the average width is 36.03 mm, the average hole diameter is 6.01 mm, and the test fixture is the test fixture described in the present invention. The average strength tested is 303.96 MPa.

[0055] The average thickness of the test sample in Example 2 is 4.62 mm, the average width is 37.05 mm, the average hole diameter is 6.00 mm, the test fixture is the test fixture described in the present utility model, and the average strength tested is 303.96 MPa.

[0056] The average thickness of the test sample in Example 3 is 4.57 mm, the average width is 38.06 mm, the average hole diameter is 6.02 mm, the test fixture is the test fixture of the present invention, and the average strength tested is 303.96 MPa.

[0057] The open-hole compression specimens of the comparative example had an average thickness of 4.60 mm, an average width of 37.01 mm, an average hole diameter of 6.00 mm, and a test fixture commissioned by the testing machine manufacturer from a third party. The average strength tested was 290.00 MPa.

[0058] In all the above embodiments, the average strength meets the requirements of the comparative example, among which: the average strength of the open-hole compression specimen with a detection width of 36±0.06mm exceeds that of the comparative example by 4.81%; the average strength of the open-hole compression specimen with a detection width of 37±0.06mm exceeds that of the comparative example by 7.04%; the average strength of the open-hole compression specimen with a detection width of 38±0.06mm exceeds that of the comparative example by 7.63%.

[0059] In this way, although there are slight differences in the thickness, width and hole diameter of the sample to be tested, the average strength value tested using the testing fixture of the present invention can be improved within the range of 4.5% to 7.5%, thereby improving the test accuracy and having strong adaptability and flexibility.

[0060] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the scope of protection of the present invention.

[0061] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0062] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some of the technical features may be replaced with equivalents; and such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A detection fixture for opening compression, characterized in that: include: Two clamping parts are arranged in a centrally symmetrical manner, wherein a fixed groove and at least one slide groove are provided in the clamping parts, wherein the fixed groove and at least one slide groove are arranged along a first direction, and the sample to be tested is set in the fixed groove, wherein the first direction is parallel to the width direction of the sample to be tested; an adjusting portion, disposed on the sliding groove, and configured to adjust a size of the fixing groove in the first direction; During the test, the side of the sample to be tested is connected to the adjustment part.

2. The detection fixture for opening compression according to claim 1, characterized in that: The clamping portion includes a first clamping member and a second clamping member, the second clamping member is covered on a first side surface of the first clamping member, the first clamping member and the second clamping member are connected by a first fastener, and the first fastener sequentially passes through the first clamping member and the second clamping member along the stacking direction of the first clamping member and the second clamping member; The sliding groove is formed by partially recessing a surface of the first side surface of the first clamping member.

3. The opening compression detection fixture according to claim 2, characterized in that: The adjusting portion includes a slider, and the slider is arranged in the sliding groove; Along the first direction, an adjusting member is provided between each of the sliders and the corresponding groove wall of the sliding groove, and two adjusting members are connected to an adjusting switch, and the adjusting switch is used to control the rotation of the adjusting member; When the adjustment switch is in the first state, the length direction of the adjustment member is perpendicular to the length direction of the slider, and the adjustment member is used to push the slider out of the slide groove; When the adjustment switch is in the second state, the length direction of the adjustment member is parallel to the length direction of the slider.

4. The detection fixture for opening compression according to claim 3, characterized in that: Along the first direction, a stretching member is further provided between each of the sliders and the corresponding groove wall of the sliding groove; When the regulating switch is in the second state, the stretching member is used to pull the slider back into the sliding groove.

5. The detection fixture for opening compression according to claim 3, characterized in that: The second clamping member is further provided with a third through hole corresponding to the regulating switch, and the regulating switch is passed through the third through hole.

6. The detection fixture for opening compression according to claim 2, characterized in that: The first clamping member includes a first clamping plate and a second clamping plate connected, the first clamping plate is located between the second clamping plate and the second clamping member; The second clamping plate is provided with an observation hole, and the punching position of the sample to be tested is located in the observation hole.

7. The detection fixture for opening compression according to claim 6, characterized in that: The thickness of the second clamping plate is smaller than that of the first clamping plate, and the outer surface of the second clamping plate is flush with the bottom surface of the fixing groove.

8. The opening compression detection fixture according to claim 6, characterized in that: The clamping portion further includes a fixing plate; The fixing plate is provided with a fourth through hole, the first clamping member is provided with a fifth through hole adapted to the fourth through hole, the second clamping member is provided with a sixth through hole adapted to the fourth through hole, and a second fastener is provided in the fourth through hole, the fifth through hole, and the sixth through hole; The fixing plate is used to fix the connection between the second clamping piece of one clamping part and the second clamping plate of another clamping part.

9. The opening compression detection fixture according to claim 6, characterized in that: A magnetic triangle seat is provided on a side of each of the first clamping plate away from the second clamping plate and a side of the second clamping plate away from the first clamping plate.

10. The opening compression detection fixture according to any one of claims 1 to 9, characterized in that: The width of the fixing groove is 37.4-38.6 mm.

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