A composite material tensile performance test specimen reinforcement sheet pasting tool and specimen preparation method

Abstract

The present invention relates to the technical field of composite material testing, in particular to a composite material tensile performance test specimen reinforcement sheet pasting tool and a specimen preparation method, the tool comprising a mounting base, an upper clamping plate and a lower clamping plate are arranged above the mounting base from top to bottom; two transverse clamping plates are arranged transversely between the upper clamping plate and the lower clamping plate; the upper clamping plate and the lower clamping plate both comprise a horizontally arranged bottom plate, baffles are symmetrically arranged at both ends of the lower and upper surfaces of the bottom plate, a plurality of intervally arranged slide rails are connected between the two baffles, two sliding clamping plates are mounted on the slide rails, and each sliding clamping plate is connected to an adjacent baffle by a spacing adjustment mechanism; a partition mounted on the slide rail is further arranged between the two sliding clamping plates; the upper clamping plate and the lower clamping plate are detachably connected by a plurality of intervally arranged fastening bolts; the present invention limits the horizontal position of the upper clamping plate, the lower clamping plate and the transverse clamping plate by a first column, a second column and a third column to prevent the reinforcement sheet from shifting when pasting.

Description

Technical Field

[0001] The invention relates to the technical field of composite material testing, and in particular to a composite material tensile property test sample reinforcement sheet pasting tool and a sample preparation method. Background Art

[0002] At present, in the tensile property test of composite materials, ASTM D-3039, ISO527-4, GB3354-2014 and other standards are generally used to prepare tensile test pieces; in the preparation process, the pasting of the reinforcement sheet of the test piece is an important link. Since the test piece needs to be clamped at both ends by a hydraulic chuck during the tensile test, and the huge clamping force may cause damage to the test piece itself, in order to avoid the clamping end of the test piece being "pinched off" by the hydraulic chuck and to ensure that the working area of ​​the test piece produces an effective failure mode under the tensile load, reinforcement sheets are usually pasted on the clamped part of the test piece for protection; the reinforcement sheet is usually made of aluminum reinforcement sheet, stainless steel reinforcement sheet, glass fiber composite material or carbon fiber composite material, etc., and the adhesive is generally made of epoxy resin, polyurethane, acrylic acid, etc.

[0003] There are some issues that need attention during the reinforcement sheet pasting process; for example, the "glue-poor" problem of the bonding surface due to the high pasting pressure during the bonding process, and the problem of loose bonding of the reinforcement sheet due to poor bonding performance of the adhesive and defects in the bonding interface; in addition, due to the high fluidity of thermosetting adhesives under high temperature and high pressure conditions during the co-curing process, it is easy to overflow from the bonding surface of the composite material, which is also easy to cause uneven thickness of the adhesive layer of the final composite material connection joint.

[0004] The main process flow of reinforcing sheet bonding is as follows: 1) In order to prevent stress concentration in the reinforced part of the specimen during the tensile process, the end of the reinforcing sheet close to the middle of the composite material test specimen is polished to about 30° for transition; 2) The thermosetting adhesive is placed on the bonding surface of the composite material ply to be bonded. At this time, in order to increase the contact area between the reinforcing sheet and the laminate and thus increase the friction between the two during the tensile process, sandpaper can be used to polish both in the direction of ±45° as needed, or chemical primer, plasma treatment, flame treatment and other processes can be performed, and then alcohol can be used to The roughened areas are cleaned; 3) Finally, the composite material and adhesive are cured in one step at a certain temperature and pressure to form the final test piece; Based on the above process, the industry has made many improvements to the tooling for auxiliary reinforcement sheet bonding, for example: First, positioning blocks can be used to ensure that the reinforcement sheet and the test piece do not slip; second, precision tooling can be used to prevent adhesive overflow; third, a metal pressure plate device can be used to pressurize the reinforcement sheet and the test piece to ensure that they fit tightly and reduce the probability of defects; fourth, autoclave technology can be used to further increase the fitting effect between the reinforcement sheet and the test piece.

[0005] However, most of the reinforcement sheet bonding tools have limitations in actual use. For example, the tool size cannot match the diversity of test piece sizes; the pressurization method of the metal pressure plate cannot ensure the uniformity of pressure due to the difference in the thickness of the test pieces; although the autoclave technology can effectively guarantee the pressurization pressure, the cost loss is extremely high, far exceeding the test benefits.

[0006] Therefore, in view of the above problems, the present invention urgently needs to provide a composite material tensile performance test sample reinforcement sheet pasting tool and a sample preparation method. Summary of the invention

[0007] The technical problem solved by the present invention is to provide a reinforcing sheet pasting tool for composite material tensile performance test specimens and a specimen preparation method. The reinforcing sheet is clamped by upper and lower clamping plates, and the edges of the reinforcing sheet and the composite material specimen are aligned through the columns, thereby solving the problem of pasting offset between the reinforcing sheet and the composite material specimen in the prior art, and achieving effective pasting between the reinforcing sheet and the composite material specimen to ensure the reliability of subsequent experimental results.

[0008] The present invention provides a reinforcing sheet pasting tool for a composite material tensile property test specimen, comprising a mounting base, an upper clamping plate and a lower clamping plate are arranged from top to bottom above the mounting base, first longitudinal moving mechanisms are arranged at opposite ends of the upper clamping plate, second longitudinal moving mechanisms are arranged at opposite ends of the lower clamping plate, each first longitudinal moving mechanism is connected to the mounting base through a second column, and each second longitudinal moving mechanism is connected to the mounting base through a second column;

[0009] Two transverse clamping plates are arranged between the upper clamping plate and the lower clamping plate at intervals, each transverse clamping plate is connected to a transverse moving mechanism, the other end of each transverse moving mechanism is connected to a third longitudinal moving mechanism, and each third longitudinal moving mechanism is connected to the mounting base through a first column;

[0010] The upper clamping plate comprises an upper bottom plate arranged horizontally, baffles are symmetrically installed at both ends of the lower surface of the upper bottom plate, and a sliding clamping mechanism is installed between the two baffles;

[0011] Each transverse clamping plate includes a clamping base, a connecting plate extending upward from one side of the clamping base, and the clamping base is connected to one end of the transverse moving mechanism; each connecting plate is detachably connected by bolts;

[0012] The lower clamping plate comprises a horizontally arranged lower bottom plate, two baffles are symmetrically installed at both ends of the upper surface of the lower bottom plate, and a sliding clamping mechanism is installed between the two baffles;

[0013] The sliding clamping mechanism comprises a plurality of sliding rails for connecting two baffles, and each sliding rail is arranged at intervals; two sliding clamping plates are installed on the sliding rails, and each sliding clamping plate is connected to an adjacent baffle through a spacing adjustment mechanism; a partition is also provided between the two sliding clamping plates, and the partition is slidably installed on the sliding rails; wherein the sliding clamping mechanism on the upper clamping plate is installed inverted, and the sliding clamping mechanism on the lower clamping plate is installed upright;

[0014] The upper clamping plate and the lower clamping plate are detachably connected by a plurality of fastening bolts arranged at intervals.

[0015] Preferably, the spacing adjustment mechanism comprises a first cylinder fixedly connected to the inner side surfaces of the baffles, and a push rod of the first cylinder extends horizontally outward and is in contact with one side of the sliding clamping plate.

[0016] Preferably, the outer surface of the slide rail is smoothly arranged.

[0017] Preferably, the transverse moving mechanism comprises a second cylinder fixedly connected to each of the third longitudinal moving mechanisms, and a push rod of the second cylinder extends horizontally outward and is fixedly connected to a side surface of the clamping base.

[0018] Preferably, each sliding clamping plate and the partition plate are made of metal.

[0019] The present invention also provides a method for preparing a composite material tensile performance test specimen based on a composite material tensile performance test specimen reinforcement sheet pasting tool, comprising the following steps:

[0020] Prepare the reinforcement sheet pasting tooling for composite material tensile property test specimens, and cut the composite material specimens and four reinforcement sheets of matching sizes;

[0021] Two reinforcing sheets are horizontally placed on the slide rails of the lower clamping plate and are respectively placed on both sides of the partition plate, and the spacing adjustment mechanism is used to drive each sliding clamping plate away from the baffle plate so that each sliding clamping plate and the partition plate clamp the reinforcing sheet, and adhesive is applied on the upper surface of the reinforcing sheet;

[0022] Use two clamping bases to clamp the composite material specimen, and use bolts to connect the two connecting plates;

[0023] Use the third longitudinal moving mechanism to move downward along the first column until the lower surface of the composite material sample is in contact with the upper surface of each reinforcement plate, remove the bolts, and place the composite material sample above the lower clamping plate; shorten the distance between each clamping base and the third longitudinal moving mechanism by using the transverse moving mechanism, and use the third longitudinal moving mechanism to move each transverse clamping plate out of the space above the lower clamping plate;

[0024] Invert the upper clamping plate, place two reinforcing sheets horizontally on the slide rail of the upper clamping plate and on both sides of the partition, use the spacing adjustment mechanism to drive each sliding clamping plate away from the baffle, so that each sliding clamping plate and the partition clamp the reinforcing sheet, and apply adhesive on the upper surface of the reinforcing sheet; turn over the upper clamping plate, and install it on the second column through the first longitudinal moving mechanism;

[0025] Use the first longitudinal moving mechanism to move downward along the second column until the lower surfaces of the two reinforcing plates clamped by the upper clamping plate are in contact with the upper surface of the composite material sample, and use fastening bolts to fix the upper clamping plate and the lower clamping plate;

[0026] The reinforcing sheet pasting tooling of the composite material tensile performance test specimen is placed in an oven for curing; after the curing is completed, the upper clamping plate and the lower clamping plate are removed to obtain the composite material tensile performance test specimen.

[0027] Preferably, the spacing adjustment mechanism comprises a first cylinder fixedly connected to the inner side surfaces of the baffles, and a push rod of the first cylinder extends horizontally outward and is in contact with one side of the sliding clamping plate.

[0028] Preferably, the tightening torques of the fastening bolts are the same.

[0029] Preferably, the thickness of the reinforcing sheet is greater than or equal to the thickness of the separator.

[0030] Preferably, the adhesive is one of epoxy resin, polyurethane and acrylic acid.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention provides a reinforcing sheet pasting tool for composite material tensile property test sample and a sample preparation method. The two reinforcing sheets are clamped by upper and lower clamping plates, the composite material sample is clamped by a clamping plate, and then the upper and lower clamping plates and the clamping mechanism are limited by a first column and a second column, so that the edges of the reinforcing sheets and the composite material sample are aligned; after the reinforcing sheets and the composite material sample are pasted together, a torque wrench is used to tighten the fastening bolts spaced between the upper and lower clamping plates, so that the thickness of the adhesive layer can be controlled and uniform, and the reinforcing sheets are prevented from debonding during subsequent tests, and the reinforcing sheets will not slip after being limited, thereby ensuring the effective working section of the sample during subsequent tests; and the tooling of the present invention has a small volume, and after the upper and lower clamping plates are clamped, they can be put into an oven for curing together with the test piece, and the tooling and curing costs are low, the steps are simple, and manpower is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram (stereoscopic diagram) of a reinforcing sheet pasting tool for a composite material tensile property test specimen according to an embodiment of the present invention;

[0034] Figure 2is a structural schematic diagram (stereoscopic diagram) of a mounting base according to an embodiment of the present invention;

[0035] Figure 3 1 is a structural schematic diagram (stereoscopic diagram) of an upper clamping plate according to an embodiment of the present invention;

[0036] Figure 4 is a structural schematic diagram (stereoscopic diagram) of the clamping mechanism described in an embodiment of the present invention;

[0037] Figure 5 1 is a structural schematic diagram (stereoscopic diagram) of the lower clamping plate according to an embodiment of the present invention;

[0038] Figure 6 It is an operation flow chart of a method for preparing a composite material tensile property test specimen according to an embodiment of the present invention.

[0039] Among them: 1. installation base; 201. first column; 202. second column; 4. upper clamping plate; 401. upper bottom plate; 5. lower clamping plate; 501. lower bottom plate; 6. transverse clamping plate; 601. connecting plate; 602. clamping base; 603. transverse moving mechanism; 7. baffle; 8. slide rail; 9. sliding clamping plate; 10. partition; 11. reinforcement plate; 12. composite material sample; 13. first longitudinal moving mechanism; 14. second longitudinal moving mechanism; 15. third longitudinal moving mechanism; 16. spacing adjustment mechanism. DETAILED DESCRIPTION

[0040] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solution 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.

[0041] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, this embodiment provides a composite material tensile performance test specimen reinforcement sheet pasting tool, including a mounting base 1, an upper clamping plate 4 and a lower clamping plate 5 are arranged from top to bottom above the mounting base 1, first longitudinal moving mechanisms 13 are arranged at opposite ends of the upper clamping plate 4, and second longitudinal moving mechanisms 14 are arranged at opposite ends of the lower clamping plate 5, each first longitudinal moving mechanism 13 is connected to the mounting base 1 through a second column 202, and each second longitudinal moving mechanism 14 is connected to the mounting base 1 through a second column 202;

[0042] Two transverse clamping plates 6 are arranged between the upper clamping plate 4 and the lower clamping plate 5 at intervals, each transverse clamping plate 6 is connected to a transverse moving mechanism 603, and the other end of each transverse moving mechanism 603 is connected to a third longitudinal moving mechanism 15, and each third longitudinal moving mechanism 15 is connected to the mounting base 1 through a first column 201;

[0043] The upper clamping plate 4 includes an upper bottom plate 401 arranged horizontally, baffles 7 are symmetrically mounted on both ends of the lower surface of the upper bottom plate 401, and a sliding clamping mechanism is mounted between the two baffles 7;

[0044] Each transverse clamping plate 6 includes a clamping base 602, a connecting plate 601 extends upward from one side of the clamping base 602, and the clamping base 602 is connected to one end of the transverse moving mechanism 603; each connecting plate 601 is detachably connected by bolts;

[0045] The lower clamping plate 5 comprises a horizontally arranged lower bottom plate 501, two baffles 7 are symmetrically mounted at both ends of the upper surface of the lower bottom plate 501, and a sliding clamping mechanism is mounted between the two baffles 7;

[0046] The sliding clamping mechanism includes a plurality of slide rails 8 for connecting the two baffles 7, and each slide rail 8 is arranged at intervals; two sliding clamping plates 9 are installed on the slide rails 8, and each sliding clamping plate 9 is connected to the adjacent baffle 7 through a spacing adjustment mechanism 16; a partition plate 10 is also provided between the two sliding clamping plates 9, and the partition plate 10 is slidably installed on the slide rails 8; wherein the sliding clamping mechanism on the upper clamping plate 4 is installed inverted, and the sliding clamping mechanism on the lower clamping plate 5 is installed upright;

[0047] The upper clamping plate 4 and the lower clamping plate 5 are detachably connected by a plurality of fastening bolts arranged at intervals.

[0048] The present invention provides a reinforcing sheet pasting tool for composite material tensile performance test sample, wherein two reinforcing sheets 11 are clamped by an upper clamping plate 4 and a lower clamping plate 5, a composite material sample 12 is clamped by a transverse clamping plate 6, and then the upper clamping plate 4, the lower clamping plate 5 and the transverse clamping plate 6 are limited by a first column 201 and a second column 202, so that the edges of the reinforcing sheet 11 and the composite material sample 12 are aligned; after the reinforcing sheet 11 and the composite material sample 12 are fitted together, a torque wrench is used to tighten the fastening bolts spaced between the upper clamping plate 4 and the lower clamping plate 5, so that the thickness of the adhesive layer can be controlled and uniform, and the reinforcing sheet 11 is prevented from debonding during subsequent tests, and the reinforcing sheet 11 will not slip after being limited, thereby ensuring the effective working section of the sample during subsequent tests; and the tooling of the present invention has a small volume, and after the upper clamping plate 4 and the lower clamping plate 5 are fastened, they can be put into an oven for curing together with the sample, and the tooling and curing costs are low, the steps are simple, and manpower is saved.

[0049] like Figure 1 , Figure 3 , Figure 5As shown, the spacing adjustment mechanism 16 includes a first cylinder fixedly connected to the inner side surfaces of the baffles 7 , and a push rod of the first cylinder extends horizontally outward and abuts against one side of the sliding clamping plate 9 .

[0050] In this embodiment, the outer surface of the slide rail 8 is smooth.

[0051] like Figure 1 , Figure 4 As shown, the transverse moving mechanism 603 includes a second cylinder fixedly connected to each third longitudinal moving mechanism 15 , and a push rod of the second cylinder extends horizontally outward and is fixedly connected to the side of the clamping base 602 .

[0052] In this embodiment, the sliding clamping plates 9 and the partition plates 10 are made of metal.

[0053] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the present invention also provides a method for preparing a composite material tensile performance test specimen based on a composite material tensile performance test specimen reinforcement sheet pasting tool, comprising the following steps:

[0054] Prepare a composite material tensile property test specimen reinforcement sheet pasting tool, cut a composite material specimen 12 and four reinforcement sheets 11 of matching sizes;

[0055] Two reinforcing sheets 11 are horizontally placed on the slide rails 8 of the lower clamping plate 5 and are placed on both sides of the partition 10. The spacing adjustment mechanism 16 is used to drive each sliding clamping plate 9 away from the baffle 7 so that each sliding clamping plate 9 and the partition 10 clamp the reinforcing sheet 11, and an adhesive is applied on the upper surface of the reinforcing sheet 11;

[0056] Use two clamping bases 602 to clamp the composite material sample 12, and use bolts to connect the two connecting plates 601;

[0057] Use the third longitudinal moving mechanism 15 to move downward along the first column 201 until the lower surface of the composite material sample 12 is in contact with the upper surface of each reinforcing plate 11, remove the bolts, and place the composite material sample 12 above the lower clamping plate 5; shorten the distance between each clamping base 602 and the third longitudinal moving mechanism 15 by using the transverse moving mechanism 603, and use the third longitudinal moving mechanism 15 to move each transverse clamping plate 6 out of the space above the lower clamping plate 5;

[0058] The upper clamping plate 4 is turned upside down, and two reinforcing sheets 11 are horizontally placed on the slide rail 8 of the upper clamping plate 4 and are placed on both sides of the partition 10. The spacing adjustment mechanism 16 is used to drive each sliding clamping plate 9 away from the baffle 7, so that each sliding clamping plate 9 and the partition 10 clamp the reinforcing sheet 11, and adhesive is applied on the upper surface of the reinforcing sheet 11; the upper clamping plate 4 is turned over and installed on the second column 202 through the first longitudinal moving mechanism 13;

[0059] Use the first longitudinal moving mechanism 13 to move downward along the second column 202 until the lower surfaces of the two reinforcing plates 11 clamped by the upper clamping plate 4 are in contact with the upper surface of the composite material sample 12, and use fastening bolts to fix the upper clamping plate 4 and the lower clamping plate 5;

[0060] The composite material tensile performance test sample reinforcement sheet pasting tooling is placed in an oven for curing; after curing, the upper clamping plate 4 and the lower clamping plate 5 are removed to obtain the composite material tensile performance test sample.

[0061] The present invention provides a reinforcing sheet pasting tool for composite material tensile performance test sample, wherein two reinforcing sheets 11 are clamped by an upper clamping plate 4 and a lower clamping plate 5, a composite material sample 12 is clamped by a transverse clamping plate 6, and then the upper clamping plate 4, the lower clamping plate 5 and the transverse clamping plate 6 are limited by a first column 201 and a second column 202, so that the edges of the reinforcing sheet 11 and the composite material sample 12 are aligned; after the reinforcing sheet 11 and the composite material sample 12 are fitted together, a torque wrench is used to tighten the fastening bolts spaced between the upper clamping plate 4 and the lower clamping plate 5, so that the thickness of the adhesive layer can be controlled and uniform, and the reinforcing sheet 11 is prevented from debonding during subsequent tests, and the reinforcing sheet 11 will not slip after being limited, thereby ensuring the effective working section of the sample during subsequent tests; and the tooling of the present invention has a small volume, and after the upper clamping plate 4 and the lower clamping plate 5 are fastened, they can be put into an oven for curing together with the sample, and the tooling and curing costs are low, the steps are simple, and manpower is saved.

[0062] like Figure 1 , Figure 3 , Figure 5 As shown, the spacing adjustment mechanism 16 includes a first cylinder fixedly connected to the inner side surfaces of the baffles 7 , and a push rod of the first cylinder extends horizontally outward and abuts against one side of the sliding clamping plate 9 .

[0063] In this embodiment, the tightening torques of the fastening bolts are the same.

[0064] In this embodiment, the thickness of the reinforcing sheet 11 is greater than or equal to the thickness of the partition 10 .

[0065] In this embodiment, the adhesive is one of epoxy resin, polyurethane and acrylic acid.

[0066] The present invention also provides an embodiment:

[0067] The reinforcing sheet is an epoxy / glass fiber reinforcing sheet with a size of 55mm*185mm; the composite material sample is made of epoxy / glass fiber prepreg with a size of 260*185mm; four reinforcing sheets are arranged in a 2+2 pattern on the upper and lower surfaces of the composite material sample, and the two reinforcing sheets on the same side are arranged at intervals so that each reinforcing sheet has three sides in the same plane as the side of the composite material sample; the adhesive used is epoxy resin and its curing agent, with a ratio of 100:26, and the curing process is curing at 80°C for 3h;

[0068] The method for preparing a composite material tensile property test specimen comprises the following steps:

[0069] Prepare the reinforcing sheet pasting tool for the composite material tensile property test sample of the present invention, and cut the composite material sample 12 and four reinforcing sheets 11 of sizes that meet the requirements;

[0070] Two reinforcing sheets 11 are horizontally placed on the slide rail 8 of the lower clamping plate 5 and are placed on both sides of the partition 10, wherein the width of the partition 10 is 150 mm, and the spacing adjustment mechanism 16 is used to drive each sliding clamping plate 9 away from the baffle 7, so that each sliding clamping plate 9 and the partition 10 clamp the reinforcing sheet 11, and an adhesive is applied on the upper surface of the two reinforcing sheets 11;

[0071] Use two clamping bases 602 to clamp the composite material sample 12, and use bolts to connect the two connecting plates 601;

[0072] Use the third longitudinal moving mechanism 15 to move downward along the first column 201 until the lower surface of the composite material sample 12 is in contact with the upper surface of each reinforcing plate 11, remove the bolts, and place the composite material sample 12 above the lower clamping plate 5; shorten the distance between each clamping base 602 and the third longitudinal moving mechanism 15 by using the transverse moving mechanism 603, and use the third longitudinal moving mechanism 15 to move each transverse clamping plate 6 out of the space above the lower clamping plate 5;

[0073] The upper clamping plate 4 is turned upside down, and two reinforcing sheets 11 are horizontally placed on the slide rail 8 of the upper clamping plate 4 and are placed on both sides of the partition 10. The spacing adjustment mechanism 16 is used to drive each sliding clamping plate 9 away from the baffle 7, so that each sliding clamping plate 9 and the partition 10 clamp the reinforcing sheet 11, and adhesive is applied on the upper surface of the reinforcing sheet 11; the upper clamping plate 4 is turned over and installed on the second column 202 through the first longitudinal moving mechanism 13;

[0074] Use the first longitudinal moving mechanism 13 to move downward along the second column 202 until the lower surfaces of the two reinforcing plates 11 clamped by the upper clamping plate 4 are in contact with the upper surface of the composite material sample 12, and use fastening bolts to fix the upper clamping plate 4 and the lower clamping plate 5;

[0075] The composite material tensile performance test sample reinforcement sheet pasting tooling is placed in an oven for curing; after curing, the upper clamping plate 4 and the lower clamping plate 5 are removed to obtain the composite material tensile performance test sample;

[0076] A composite material tensile performance test sample was cut into 6 samples of 250mm*25mm, and data testing was completed in the same test unit. The test results were: the average tensile strength was 483MPa, the average tensile modulus was 22.28GPa, and the coefficients of dispersion were 1.62% and 1.01%, respectively; the test samples obtained by the present invention were compared with the test samples obtained by the existing reinforcement sheet pasting tooling, and the tensile strength was increased by 11%, the tensile modulus was increased by 3%, and the dispersion was reduced by 40%.

[0077] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A composite material tensile performance test specimen reinforcement sheet pasting tool, characterized by: The mounting base (1) comprises an upper clamping plate (4) and a lower clamping plate (5) which are arranged from top to bottom on the mounting base (1); first longitudinal moving mechanisms (13) are arranged at opposite ends of the upper clamping plate (4); second longitudinal moving mechanisms (14) are arranged at opposite ends of the lower clamping plate (5); each first longitudinal moving mechanism (13) is connected to the mounting base (1) via a second column (202); and each second longitudinal moving mechanism (14) is connected to the mounting base (1) via a second column (202); Two transverse clamping plates (6) are arranged laterally between the upper clamping plate (4) and the lower clamping plate (5), each transverse clamping plate (6) is connected to a transverse moving mechanism (603), the other end of each transverse moving mechanism (603) is connected to a third longitudinal moving mechanism (15), and each third longitudinal moving mechanism (15) is connected to the mounting base (1) via a first column (201); The upper clamping plate (4) comprises an upper base plate (401) arranged horizontally, baffles (7) are symmetrically mounted at both ends of the lower surface of the upper base plate (401), and a sliding clamping mechanism is mounted between the two baffles (7); Each transverse clamping plate (6) comprises a clamping base (602), a connecting plate (601) extending upward from one side of the clamping base (602), and the clamping base (602) is connected to one end of the transverse moving mechanism (603); the connecting plates (601) are detachably connected by bolts; The lower clamping plate (5) comprises a horizontally arranged lower base plate (501), two baffles (7) are symmetrically mounted at both ends of the upper surface of the lower base plate (501), and a sliding clamping mechanism is mounted between the two baffles (7); The sliding clamping mechanism comprises a plurality of sliding rails (8) for connecting two baffles (7), and each sliding rail (8) is arranged at intervals; two sliding clamping plates (9) are installed on the sliding rails (8), and each sliding clamping plate (9) is connected to an adjacent baffle (7) via a spacing adjustment mechanism (16); a partition plate (10) is also provided between the two sliding clamping plates (9), and the partition plate (10) is slidably installed on the sliding rails (8); wherein the sliding clamping mechanism on the upper clamping plate (4) is installed in an inverted manner, and the sliding clamping mechanism on the lower clamping plate (5) is installed in an upright manner; The upper clamping plate (4) and the lower clamping plate (5) are detachably connected via a plurality of fastening bolts arranged at intervals.

2. The reinforcing sheet pasting tool for composite material tensile property test specimen according to claim 1, characterized in that: The spacing adjustment mechanism (16) comprises a first cylinder fixedly connected to the inner side surfaces of the baffles (7) opposite to each other, and a push rod of the first cylinder horizontally extends outward and is connected to abut against one side of the sliding clamping plate (9).

3. The reinforcing sheet pasting tool for composite material tensile property test specimen according to claim 2, characterized in that: The outer surface of the slide rail (8) is arranged to be smooth.

4. The reinforcing sheet pasting tool for composite material tensile property test specimen according to claim 3, characterized in that: The transverse moving mechanism (603) comprises a second cylinder fixedly connected to each third longitudinal moving mechanism (15), and a push rod of the second cylinder extends horizontally outward and is fixedly connected to a side surface of the clamping base (602).

5. The reinforcing sheet pasting tool for composite material tensile property test specimen according to claim 4, characterized in that: The sliding clamping plates (9) and the partition plates (10) are all made of metal.

6. A method for preparing a composite material tensile performance test specimen based on the composite material tensile performance test specimen reinforcement sheet pasting tool as claimed in any one of claims 1 to 5, characterized in that: The steps include: Prepare a composite material tensile property test specimen reinforcement sheet pasting tool, and cut a composite material specimen (12) and four reinforcement sheets (11) of matching sizes; Two reinforcing sheets (11) are horizontally placed on the slide rail (8) of the lower clamping plate (5) and are respectively placed on both sides of the partition (10), and the spacing adjustment mechanism (16) is used to drive each sliding clamping plate (9) away from the baffle (7), so that each sliding clamping plate (9) and the partition (10) clamp the reinforcing sheet (11), and an adhesive is applied to the upper surface of the reinforcing sheet (11); Using two clamping bases (602) to clamp the composite material sample (12), and using bolts to connect the two connecting plates (601); Using the third longitudinal moving mechanism (15) to move downward along the first column (201) until the lower surface of the composite material sample (12) is in contact with the upper surface of each reinforcing plate (11), removing the bolts, and placing the composite material sample (12) above the lower clamping plate (5); shortening the distance between each clamping base (602) and the third longitudinal moving mechanism (15) by using the transverse moving mechanism (603), and using the third longitudinal moving mechanism (15) to move each transverse clamping plate (6) out of the space above the lower clamping plate (5); The upper clamping plate (4) is turned upside down, and two reinforcing sheets (11) are horizontally placed on the slide rail (8) of the upper clamping plate (4) and are respectively placed on both sides of the partition (10). The spacing adjustment mechanism (16) is used to drive each sliding clamping plate (9) away from the baffle (7), so that each sliding clamping plate (9) and the partition (10) clamp the reinforcing sheet (11), and an adhesive is applied to the upper surface of the reinforcing sheet (11); the upper clamping plate (4) is turned over and installed on the second column (202) through the first longitudinal moving mechanism (13); Using the first longitudinal moving mechanism (13) to move downward along the second column (202) until the lower surfaces of the two reinforcing plates (11) clamped by the upper clamping plate (4) are in contact with the upper surface of the composite material sample (12), and using fastening bolts to fix the upper clamping plate (4) and the lower clamping plate (5); The composite material tensile performance test specimen reinforcement sheet pasting tooling is placed in an oven for curing; after the curing is completed, the upper clamping plate (4) and the lower clamping plate (5) are removed to obtain the composite material tensile performance test specimen.

7. The method for preparing a composite material tensile property test specimen according to claim 6, characterized in that: The spacing adjustment mechanism (16) comprises a first cylinder fixedly connected to the inner side surfaces of the baffles (7) opposite to each other, and a push rod of the first cylinder horizontally extends outward and is connected to abut against one side of the sliding clamping plate (9).

8. The method for preparing a composite material tensile property test specimen according to claim 7, characterized in that: The tightening torque of each fastening bolt is the same.

9. The method for preparing a composite material tensile property test specimen according to claim 8, characterized in that: The thickness of the reinforcing sheet (11) is greater than or equal to the thickness of the partition (10).

10. The method for preparing a composite material tensile property test specimen according to claim 9, characterized in that: The adhesive is one of epoxy resin, polyurethane and acrylic.

Images