Pre-pressing tool for honeycomb test and honeycomb crushing test method

Abstract

The invention discloses a pre-pressing tool for honeycomb testing and a honeycomb crushing testing method.The pre-pressing tool comprises a pre-pressing air cylinder, a cutting pushing air cylinder, a pre-pressing panel, a cutting blade and a base, four guide columns are fixedly connected to the four corners of the upper surface of the base correspondingly, and a tool body frame is fixedly connected to the top ends of the four guide columns; the pre-pressing air cylinder is fixedly installed on the upper surface of the tool body frame, the air cylinder frame is fixedly installed on the output portion of the top end of the pre-pressing air cylinder, the pre-pressing panel is fixedly installed at the lower ends of the two longitudinal arm ends of the air cylinder frame, and the cutting pushing air cylinder is fixedly installed on the upper surface of the pre-pressing panel. According to the prepressing tool for the honeycomb test and the honeycomb crushing test method, the honeycomb surface is completely prepressed, and then the 5T universal testing machine is used for performing crushing test on the honeycomb core, so that the problem that the crushing value curve discreteness is relatively high when the test result shows that the surface of the honeycomb core is not prepressed in the test can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of material testing, in particular to a pre-pressing tool for honeycomb testing and a honeycomb crushing testing method. Background Art

[0002] The main materials of aluminum honeycomb core are aluminum foil and adhesive. There are special processes in the production process of aluminum honeycomb core, so each batch of honeycomb needs to be tested in a variety of experimental tests during mass production. One of the experimental test methods for energy-absorbing honeycomb products is to test the crushing strength of the honeycomb core. The method and results of testing the crushing strength of the honeycomb core verify that the surface of the energy-absorbing honeycomb core needs to be pre-pressed.

[0003] The crush strength test is a test of the failure of the honeycomb core to break and break. However, the aluminum honeycomb core requires external energy intervention during this crushing process. Therefore, the aluminum honeycomb core has a certain energy absorption function, which is used in buffering energy absorption. According to the experimental specification TP-214D-09 document, the crush strength of the honeycomb core is tested. It is found in multiple tests that the test results of the aluminum honeycomb core surface without pre-stressing show that the crush value curve is more discrete. This proves that the actual crush energy absorption curve of the aluminum honeycomb core in the application of energy absorption is also more discrete, and the stability of the energy absorption of the aluminum honeycomb core cannot be guaranteed. This result may cause deviations in the evaluation of the crush strength of the honeycomb core, affecting the accurate judgment of the material performance, and verifies that the honeycomb core surface needs to be pre-stressed when it is used in energy absorption. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a pre-pressing tool for honeycomb testing and an aluminum honeycomb crushing test method to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pre-stressing tool for honeycomb testing, comprising a pre-stressing cylinder, a cutting push cylinder, a pre-stressing panel, a cutting blade and a base, wherein four guide pillars are fixedly connected to the four corners of the upper surface of the base, respectively, and the tops of the four guide pillars are fixedly connected to the tooling main frame, the pre-stressing cylinder is fixedly installed on the upper surface of the tooling main frame, the output part of the top of the pre-stressing cylinder is fixedly installed on the cylinder frame, the pre-stressing panel is fixedly installed on the lower ends of the two longitudinal arm ends of the cylinder frame, the cutting push cylinder is fixedly installed on the upper surface of the pre-stressing panel, the output part of the cutting push cylinder is fixedly connected to the tooling destruction grid plate, and a plurality of cutting blades are fixedly installed on the surface of the tooling destruction grid plate.

[0006] As a preferred technical solution of the present invention, a pre-pressing groove is provided on the base, and the plurality of cutting blades are all double-edged structures.

[0007] As a preferred technical solution of the present invention, both ends of the tooling destruction grid plate are fixedly connected with sliding blocks, both ends of the upper surface of the pre-stressing panel are fixedly connected with sliding guide rails, and the two sliding blocks are slidably connected to the two sliding guide rails respectively.

[0008] As a preferred technical solution of the present invention, the interior of the base is a hollow structure, the interior of the base is slidably connected with a pressure abutment block, the pressure abutment block is fixedly connected with a pressure-bearing bracket, the pressure-bearing bracket is rotatably connected with two support shafts, the interior of the base is fixedly connected with two groups of support blocks, the interiors of the two groups of support blocks are both provided with guide frames, one end of the two guide frames are fixedly connected with a pressure-bearing block, the cross-sectional shape of the pressure-bearing block is trapezoidal, the interior of the base is rotatably connected with a rotating shaft, the surface of the rotating shaft is fixedly connected with an ejection piece, the ejection piece rotates around the rotating shaft, and the ejection piece is divided into two sections by the rotating shaft, the guide frame is located at a section away from the reset spring of the ejection part, one end of the ejection piece is installed with a lamp bead, and the side of the base is slidably provided with a card plate cooperating with the ejection piece, and one end of the card plate is fixedly connected with a limiting part push spring.

[0009] As a preferred technical solution of the present invention, an ejection part reset spring is arranged inside the base, a support plate is fixedly connected inside the base, and two ends of the ejection part reset spring are respectively fixedly connected to the support plate and the ejection plate.

[0010] As a preferred technical solution of the present invention, a shielding sheet is fixedly installed on the side of the base.

[0011] A method for testing honeycomb crushing using a honeycomb test pre-compression tool, the test method is as follows:

[0012] Step 1: According to the experimental requirements, sample blocks are taken from each batch of honeycomb cores for crushing strength test;

[0013] Step 2, placing the honeycomb core in a pre-pressing tool to pre-destroy the surface of the honeycomb core;

[0014] Step 3: After the pre-destruction is completed, the surface of the honeycomb core is pre-pressed by a pre-pressing tool;

[0015] Step 4, testing the crushing strength of the honeycomb sample on a universal testing machine;

[0016] Step 5: Statistically summarize and analyze the test results.

[0017] As a preferred technical solution of the present invention, the thickness of the honeycomb core sample cut in the experiment is 25mm, the cutting size is 152mm*152mm, and the sample needs to be evenly sampled in 4 areas of 304mm*304mm on the entire honeycomb core surface, and each area is divided into 4 blocks.

[0018] Compared with the prior art, the present invention provides a pre-pressing tool for honeycomb testing and a honeycomb crushing test method, which have the following beneficial effects:

[0019] 1. The present invention damages the surface of the honeycomb core by reciprocatingly scratching the surface of the honeycomb core with a cutting blade, and then continues to reciprocate and pre-press the honeycomb surface with a pre-pressing cylinder until the honeycomb surface is completely pre-pressed, and then uses a 5T universal testing machine to perform a crush test on the remaining undamaged part of the honeycomb core, which can solve the problem that the test result of the honeycomb core surface without pre-pressing shows that the crush value curve has a large discreteness, thereby verifying the influence of the honeycomb core surface without pre-pressing on the data in energy absorption application, stabilizing the test result through practical application, reducing the evaluation deviation of the crush strength of the honeycomb core, and preventing the influence on the accurate judgment of the material performance.

[0020] 2. The present invention makes the end of the ejection piece with the lamp bead detach from the groove on the card plate to expose the lamp bead. It can be judged whether the lamp bead is exposed and the light emitted by the lamp bead that the sharpness of the cutting blade is low, so as to find out and replace it in time. It can find out and replace it in time when the cutting blade is used for a long time and the cutting blade is worn out and the sharpness is insufficient, so as to prevent the cutting blade from being insufficiently sharp and causing large pieces of tearing when cutting the honeycomb core, which affects the uniformity of the surface of the honeycomb core after pre-compression, and further reduces the evaluation deviation of the crushing strength of the honeycomb core. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the part of the grille plate destroyed by the tooling of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the base of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure inside the base of the present invention;

[0025] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 It is a schematic diagram of the structure of the return spring portion of the ejection part of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the ejector plate part of the present invention;

[0028] Figure 8 This is a statistical diagram of the average value data of the first 25mm non-preloaded samples of the present invention;

[0029] Fig. 9 This is a statistical diagram of the average value data of the second 25mm non-preloaded samples of the present invention;

[0030] Fig.10 This is a statistical diagram of the average value data of the first 25mm pre-pressed samples of the present invention;

[0031] Fig.11 This is a statistical chart of the average value data of the second 25mm non-preloaded samples of the present invention.

[0032] In the figure: 1. Cylinder frame; 2. Cylinder for pre-stressing; 3. Cutting push cylinder; 4. Base; 5. Pre-stressing panel; 6. Guide column; 7. Tool main frame; 8. Tool destroying grid plate; 9. Cutting blade; 10. Sliding guide rail; 11. Sliding block; 12. Pre-stressing groove; 13. Ejector plate; 14. Pressure abutment block; 15. Pressure bearing bracket; 16. Support shaft; 17. Pressure bearing block; 18. Guide frame; 19. Support block; 20. Support plate; 21. Ejector part reset spring; 22. Card plate; 23. Shielding plate; 24. Limiting part push spring; 25. Rotating shaft; 26. Lamp beads. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-7 The present invention provides a technical solution of a pre-pressing tool for honeycomb testing and a honeycomb crushing test method:

[0035] according to Figure 1 , Figure 2 and Figure 3As shown, a pre-pressing tool for honeycomb testing includes a pre-pressing cylinder 2, a cutting and pushing cylinder 3, a pre-pressing panel 5, a cutting blade 9 and a base 4. Four guide pillars 6 are fixedly connected to the four corners of the upper surface of the base 4, and the tops of the four guide pillars 6 are fixedly connected to the tool main frame 7. The pre-pressing cylinder 2 is fixedly installed on the upper surface of the tool main frame 7, and the output part of the top of the pre-pressing cylinder 2 is fixedly installed on the cylinder frame 1. The pre-pressing panel 5 is fixedly installed on the lower ends of the two longitudinal arm ends of the cylinder frame 1. The pre-pressing cylinder 2 drives the pre-pressing panel 5 to move downward along the guide pillars 6 to pressurize and fix the honeycomb core, and reciprocate the surface of the honeycomb core. The pre-pressing action is performed until the honeycomb surface is completely pre-pressed, so that the pre-pressing operation of the honeycomb core can be realized. The cutting propulsion cylinder 3 is fixedly installed on the upper surface of the pre-pressing panel 5. The cutting propulsion cylinder 3 drives the tooling destruction grid plate 8 and the cutting blade 9 to move along the sliding guide rail 10, so that the cutting blade 9 can reciprocate on the surface of the honeycomb core. The output part of the cutting propulsion cylinder 3 is fixedly connected with the tooling destruction grid plate 8. A plurality of cutting blades 9 are fixedly installed on the surface of the tooling destruction grid plate 8. The cutting blade 9 is reciprocated on the surface of the honeycomb core, and the surface of the honeycomb core can be destroyed by the cutting blade 9, so as to perform the subsequent pre-pressing operation;

[0036] Among them, a pre-pressing groove 12 is opened on the base 4, and the honeycomb core can be more conveniently set at the specified position through the pre-pressing groove 12. The multiple cutting blades 9 are all double-edged structures. The cutting blades 9 with double-edged structures can complete two cuts in one back and forth when the blade moves back and forth, thereby improving the cutting efficiency of the honeycomb core. Both ends of the tooling destroying grid plate 8 are fixedly connected with sliding blocks 11, and both ends of the upper surface of the pre-pressing panel 5 are fixedly connected with sliding guide rails 10, and the two sliding blocks 11 are slidably connected to the two sliding guide rails 10 respectively.

[0037] During specific use, the honeycomb core to be tested is placed in the pre-stressing groove 12 on the base 4, and then the pre-stressing cylinder 2 drives the pre-stressing panel 5 to move downward along the guide column 6 to pressurize and fix the honeycomb core, and then the cutting propulsion cylinder 3 drives the tooling destruction grid plate 8 and the cutting blade 9 to move along the sliding guide rail 10, so that the cutting blade 9 can reciprocate on the surface of the honeycomb core, that is, the surface of the honeycomb core can be destroyed by the cutting blade 9. After the destruction is completed, the cutting propulsion cylinder 3 returns to its original state, and then the pre-stressing cylinder 2 continues to reciprocate and pre-stress the honeycomb surface until the honeycomb surface is completely pre-stressed.

[0038] according to Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the interior of the base 4 is a hollow structure, the interior of the base 4 is slidably connected with a pressure abutment block 14, the pressure abutment block 14 is fixedly connected with a pressure bearing bracket 15, the pressure bearing bracket 15 is rotatably connected with two support shafts 16, the interior of the base 4 is fixedly connected with two groups of support blocks 19, the interiors of the two groups of support blocks 19 are both inserted with guide frames 18, one end of the two guide frames 18 is fixedly connected with a pressure block 17, when the honeycomb core is pushed with a large thrust, the honeycomb core will drive the pressure abutment block 14 to move, so that the support shaft 16 is squeezed and rolled on the inclined surface of the pressure block 17, and the rotatable support shaft 16 can reduce the resistance caused by friction and reduce the wear on the pressure block 17, the cross-sectional shape of the pressure block 17 is a trapezoid, so that the support shaft 16 can be rotated on the pressure block 17. The inclined surface 7 is squeezed and rolled, so that the two pressure blocks 17 at the corresponding positions can move in the direction away from each other. The base 4 is internally rotatably connected with a rotating shaft 25, and the surface of the rotating shaft 25 is fixedly connected with an ejection piece 13. The ejection piece 13 rotates around the rotating shaft 25, and the ejection piece 13 is divided into two sections by the rotating shaft 25. The guide frame 18 is located at a section away from the ejection part reset spring 21. One end of the ejection piece 13 is ejected by the guide frame 18, so that the lamp bead 26 can be exposed. The lamp bead 26 is installed at one end of the ejection piece 13. Whether the lamp bead 26 is exposed and the light emitted by the lamp bead 26 can be used to judge whether the sharpness of the cutting blade 9 is low, so as to find and replace it in time, so as to prevent the cutting blade 9 from being insufficiently sharp and causing large pieces to be torn when cutting the honeycomb core;

[0039] Among them, a card plate 22 that cooperates with the ejection piece 13 is slidably provided on the side of the base 4, and one end of the card plate 22 is fixedly connected with a limiting portion pushing spring 24. Through the cooperation of the limiting portion pushing spring 24 and the card plate 22, resistance can be applied to limit the rotation of the ejection piece 13. An ejection portion return spring 21 is provided inside the base 4. The ejection portion return spring 21 can push the ejection piece 13 back to its original position when the ejection piece 13 is not subjected to thrust and the card plate 22 is manually moved away from the ejection piece 13, and the size of the thrust generated when the blade is not sharp enough is detected by the resistance applied by the ejection portion return spring 21, the limiting portion pushing spring 24 and the card plate 22, so as to timely push the lamp bead 26 on the ejection piece 13 to be exposed, and a support piece 20 is fixedly connected to the inside of the base 4, and the two ends of the ejection portion return spring 21 are respectively fixedly connected to the support piece 20 and the ejection piece 13, and a shielding piece 23 is fixedly installed on the side of the base 4.

[0040] During specific use, as the cutting blade 9 is used for a long time, if the cutting blade 9 is worn out and becomes less sharp, the thrust caused by the cutting blade 9 when it passes over the honeycomb core is relatively large. When the honeycomb core is pushed with a large thrust, the honeycomb core will drive the pressure abutment block 14 to move, causing the support shaft 16 to squeeze and roll on the inclined surface of the pressure block 17, so that the two pressure blocks 17 at corresponding positions move away from each other. Since the ejection piece 13 is divided into two sections with the rotating shaft 25 as the rotation axis, and the guide frame 18 is located at a section away from the ejection part reset spring 21, the ejection piece 13 can be pushed to rotate by the guide frame 18, so that the end of the ejection piece 13 with the lamp bead 26 is separated from the groove on the card plate 22, so that the lamp bead 26 is exposed. The sharpness of the cutting blade 9 can be judged by whether the lamp bead 26 is exposed, and it can be replaced in time.

[0041] according to Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, a test method for testing honeycomb crushing using a honeycomb test pre-compression tool is as follows:

[0042] Step 1: According to the experimental requirements, sample blocks are taken from each batch of honeycomb cores for crushing strength test;

[0043] Step 2, placing the honeycomb core in a pre-pressing tool to pre-destroy the surface of the honeycomb core;

[0044] Step 3: After the pre-destruction is completed, the surface of the honeycomb core is pre-pressed by a pre-pressing tool;

[0045] Step 4: Perform a crushing strength test on the honeycomb sample on a universal testing machine to test the remaining undamaged part;

[0046] Step 5: Statistically summarize and analyze the test results.

[0047] In a specific embodiment of the present invention: the thickness of the honeycomb core sample cut for the experiment is 25 mm, the cutting size is 152 mm*152 mm, the sample needs to be evenly sampled in 4 areas of 304 mm*304 mm on the entire honeycomb core surface, each area is divided into 4 blocks, and a 5T universal testing machine is used in the experimental test process.

[0048] In the drawings of the specification Figure 8 , Fig. 9 , Fig.10 and Fig.11 The green line of 0.308MPa is the lower limit of the crushing strength of the honeycomb core, and the red line of 0.342MPa is the upper limit of the crushing strength of the honeycomb core.

[0049] As shown in the following chart, Table 1-4, the horizontal coordinate is the displacement value of the honeycomb crushing in the experiment, and its unit is mm. The horizontal coordinate displacement has three intervals, which are 6.4mm to 9.7mm; 9.7mm to 13.2mm; 13.2mm to 16.5mm. The vertical coordinate represents the crushing strength value of the honeycomb core, and its unit is MPa. The experiment requires that a single test of the honeycomb core experiment requires that 4 experimental blocks be obtained in different areas after cutting the samples in the experiment, which are represented by experimental block 1, experimental block 2, experimental block 3, and experimental block 4 in Table 1-4. For each honeycomb sample block, the average value of the honeycomb core crushing strength in the interval is obtained according to the displacement of the three intervals and recorded in the table.

[0050] According to the experimental specification TP-214D-09 document, the crushing strength of the honeycomb core was tested. It was found that the test results of the honeycomb core surface without pre-compression showed that the crushing value curve was more discrete, as shown in the following chart. According to the theoretical requirement value of the honeycomb crushing strength of 0.325Mpa, Table 1 and Table 2 are combined with the drawings in the specification. Figure 8 and Fig. 9 The average value data of 4 samples in the interval are statistically analyzed, and the crush value of this type of honeycomb core is tested and statistically analyzed. The crush strength value range is 0.305MPa to 0.383MPa. The crush value range is basically within + / -10% of the theoretical crush value of 0.325Mpa. This experiment requires the honeycomb block to be 25mm high and 152mm*152mm long and wide. Tables 1 and 2 are both average value data statistics after 25mm without pre-compression.

[0051]

[0052] Table 1

[0053]

[0054] Table 2

[0055] The crush value of the honeycomb core surface was compared with that of the non-pre-pressed surface. The crush value results showed that the fluctuation range of the crush value curve of the pre-pressed honeycomb core was within the range of + / -5% of 3.25Mpa, that is, 0.310Mpa to 0.340Mpa. Compared with the crush value curve of the non-pre-pressed honeycomb core, it is softer, with a small fluctuation range and no upward trend at the rear end of the curve. The crush value curve is stable, as shown in the following chart. Table 3 and Table 4 are combined with the drawings in the specification. Fig.10 and Fig.11The average value data of 4 samples in the interval are statistically analyzed. The crush value range of this type of honeycomb core is 0.310MPa ~ 0.340MPa. This experiment requires the height of the honeycomb block to be 25mm, and the length and width to be 152mm*152mm. If the comparison interval is set according to the + / -5% range of the theoretical crush value of 3.25Mpa, the lower limit of the test crush strength value is set to the green line 0.308MPa and the upper limit is set to the red line 0.342MPa. The statistical comparison of the data curves is the non-prestressed curve in the attached figure. Figure 8 , Fig. 9 and the curve after preload Fig.10 , Fig.11 Tables 3 and 4 are the average value statistics after 25mm preload.

[0056]

[0057] Table 3

[0058]

[0059] Table 4

[0060] Through the above data statistics, the values ​​of the collapse value curve fluctuating within the range of + / -5% are closer to the theoretical collapse value of 3.25Mpa and the curve is visually stable. On the contrary, the collapse curve fluctuation of the unprestressed honeycomb core has obviously exceeded the range of + / -5% and the rear end curve fluctuates greatly. From the comparison of the test results, it can be concluded that the collapse values ​​of the honeycomb core surface with and without prestressing are compared. The collapse value results show that the honeycomb curve after prestressing is softer and closer to the theoretical collapse value and there is no upward trend at the rear end of the curve. The collapse value curve is stable, which reduces the evaluation deviation of the collapse strength of the honeycomb core and prevents the accurate judgment of the material performance from being affected. This experiment verifies that the honeycomb core surface needs to be prestressed when it is used in energy absorption scenarios.

[0061] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A pre-pressing tool for honeycomb testing, characterized in that: The invention comprises a pre-pressing cylinder (2), a cutting propulsion cylinder (3), a pre-pressing panel (5), a cutting blade (9) and a base (4); four guide pillars (6) are fixedly connected to the four corners of the upper surface of the base (4); the top ends of the four guide pillars (6) are fixedly connected to a tooling main frame (7); the pre-pressing cylinder (2) is fixedly mounted on the upper surface of the tooling main frame (7); the output portion of the top end of the pre-pressing cylinder (2) is fixedly mounted on a cylinder frame (1); the pre-pressing panel (5) is fixedly mounted on the lower ends of the two longitudinal arm ends of the cylinder frame (1); the cutting propulsion cylinder (3) is fixedly mounted on the upper surface of the pre-pressing panel (5); the output portion of the cutting propulsion cylinder (3) is fixedly connected to a tooling destroying grid plate (8); and a plurality of cutting blades (9) are fixedly mounted on the surface of the tooling destroying grid plate (8).

2. A pre-pressing tool for honeycomb testing according to claim 1, characterized in that: The base (4) is provided with a pre-pressing groove (12), and the plurality of cutting blades (9) are all double-edged structures.

3. The pre-pressing tool for honeycomb testing according to claim 1, characterized in that: Both ends of the tooling destruction grid plate (8) are fixedly connected with sliding blocks (11), and both ends of the upper surface of the pre-stressing panel (5) are fixedly connected with sliding guide rails (10), and the two sliding blocks (11) are respectively slidably connected to the two sliding guide rails (10).

4. The pre-pressing tool for honeycomb testing according to claim 1, characterized in that: The interior of the base (4) is a hollow structure. A pressure abutment block (14) is slidably connected to the interior of the base (4). A pressure bearing bracket (15) is fixedly connected to the pressure abutment block (14). Two support shafts (16) are rotatably connected to the pressure bearing bracket (15). Two groups of support blocks (19) are fixedly connected to the interior of the base (4). Guide frames (18) are inserted into the interiors of the two groups of support blocks (19). One end of each of the two guide frames (18) is fixedly connected to a pressure block (17). The cross-sectional shape of the pressure block (17) is a trapezoid. The base The inner part of the base (4) is rotatably connected with a rotating shaft (25), and the surface of the rotating shaft (25) is fixedly connected with an ejection piece (13). The ejection piece (13) rotates around the rotating shaft (25) and is divided into two sections by the rotating shaft (25). The guide frame (18) is located at a section away from the ejection part reset spring (21). A lamp bead (26) is installed at one end of the ejection piece (13). A card plate (22) matching with the ejection piece (13) is slidably provided on the side of the base (4), and one end of the card plate (22) is fixedly connected with a limiting part pushing spring (24).

5. The pre-pressing tool for honeycomb testing according to claim 4, characterized in that: An ejection part return spring (21) is arranged inside the base (4), a support sheet (20) is fixedly connected inside the base (4), and two ends of the ejection part return spring (21) are respectively fixedly connected to the support sheet (20) and the ejection sheet (13).

6. The pre-pressing tool for honeycomb testing according to claim 4, characterized in that: A shielding sheet (23) is fixedly mounted on the side of the base (4).

7. A method for testing honeycomb collapse using a honeycomb test pre-compression tool, the test method is as follows: Step 1: According to the experimental requirements, sample blocks are taken from each batch of honeycomb cores for crushing strength test; Step 2, placing the honeycomb core in a pre-pressing tool to pre-destroy the surface of the honeycomb core; Step 3: After the pre-destruction is completed, the surface of the honeycomb core is pre-pressed by a pre-pressing tool; Step 4, testing the crushing strength of the honeycomb sample on a universal testing machine; Step 5: Statistically summarize and analyze the test results.

8. A method for testing honeycomb collapse using a honeycomb test pre-compression tool according to claim 7, characterized in that: The thickness of the honeycomb core sample cut for the experiment is 25mm, and the cutting size is 152mm*152mm. The sample needs to be evenly distributed in 4 areas of 304mm*304mm on the entire honeycomb core surface, and each area is divided into 4 blocks.

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