Device for testing peel strength between composite material and metal

Abstract

The utility model provides a composite material and metal peel strength testing device, and belongs to the technical field of material mechanics testing. The first stand column and the second stand column are fixed to the two ends of the metal base respectively. The first clamping rod penetrates through the first stand column and moves on the first stand column in the axial direction, and the second clamping rod penetrates through the second stand column and moves on the second stand column in the axial direction; the first metal joint is detachably connected with the first clamping rod; the second metal joint is fixedly connected with the second clamping rod; a first baffle and a second baffle; the first baffle is connected between the first clamping rod and the first metal connector in a sleeved mode, and the second baffle is connected between the second clamping rod and the second metal connector in a sleeved mode. Wherein the contact surface of the second metal joint is larger than that of the first metal joint. According to the device provided by the utility model, the distance between the first metal joint and the second metal joint can be adjusted.

Description

Technical Field

[0001] The utility model belongs to the technical field of material mechanics testing, and in particular relates to a composite material and metal peeling strength testing device. Background Art

[0002] The bonding of composite materials to metal materials is widely used in various industrial products, especially those that require high strength, corrosion resistance and light weight. In order to ensure the bonding quality between these composite materials and metals, a series of physical and mechanical performance tests are usually required, including normal peel strength tests. In related technologies, the test method is usually to make the two bonded phases into round rods and perform butt bonding. The traditional specimen preparation process is as follows: First, a layer of adhesive needs to be evenly coated on the metal surface, and then the round rod composite material specimen is placed on the adhesive and a certain pressure is applied to ensure good contact. After the adhesive is cured, a tensile tester is used to apply a tensile force perpendicular to the bonding surface to the sample until it is broken, so as to evaluate its normal peel strength. However, the above method faces some challenges in actual operation, such as: (1) when testing the bonding strength between the composite material and the metal interface, the processing cost of the round rod composite material specimen is high; (2) the pressure applied manually during the bonding process significantly determines the bonding thickness, so there is a problem of uneven bonding, which affects the reliability of the final test results. Utility Model Content

[0003] In view of the above problems, an embodiment of the present application provides a composite material and metal peel strength testing device to overcome the above problems or at least partially solve the above problems.

[0004] In a first aspect of an embodiment of the present application, a composite material and metal peel strength test device is provided, comprising:

[0005] Metal base 1;

[0006] A first column 2 and a second column 3, wherein the first column 2 and the second column 3 are respectively fixed at two ends of the metal base 1;

[0007] A first clamping rod 4 and a second clamping rod 5, wherein the first clamping rod 4 passes through the first column 2 and moves axially on the first column 2, and the second clamping rod 5 passes through the second column 3 and moves axially on the second column 3;

[0008] a first metal joint 6 detachably connected to the first clamping rod 4;

[0009] A second metal joint 7, fixedly connected to the second clamping rod 5;

[0010] A first baffle 8 and a second baffle 9; wherein the first baffle 8 is sleeved between the first clamping rod 4 and the first metal joint 6, and the second baffle 9 is sleeved between the second clamping rod 5 and the second metal joint 7; wherein the contact surface of the second metal joint 7 is larger than the contact surface of the first metal joint 6.

[0011] Furthermore, the first baffle 8 and the second baffle 9 are respectively provided with a first opening, and the first opening of the first baffle 8 and the first opening of the second baffle 9 are coaxially arranged.

[0012] Furthermore, the first baffle 8 and the second baffle 9 are respectively provided with a plurality of second openings, and the second openings of the first baffle 8 and the second openings of the second baffle 9 are coaxially arranged.

[0013] Furthermore, it also includes a plurality of positioning bolts 11 ; wherein, the plurality of positioning bolts 11 are arranged on a plurality of coaxial second openings between the first baffle 8 and the second baffle 9 .

[0014] Furthermore, it also includes a plurality of positioning pads 10 ; wherein the plurality of positioning pads 10 are arranged between the first baffle 8 and the second baffle 9 .

[0015] Furthermore, the first column 2 and the second column 3 are respectively provided with a third opening, and the third opening of the first column 2 and the third opening of the second column 3 are coaxially arranged.

[0016] Furthermore, the metal base 1 is fixedly connected to the first column 2 and the second column 3 respectively through positioning screws 15.

[0017] Furthermore, the first metal joint 6 is bonded to one side of the composite material plate 13 through the adhesive to be tested 12, and the second metal joint 7 is bonded to the other side of the composite material plate 13 through the reference adhesive 14; wherein the peel strength of the adhesive to be tested 12 is unknown, and the peel strength of the reference adhesive 14 is known.

[0018] Furthermore, the thickness of the reference adhesive 14 is greater than the thickness of the adhesive to be tested 12 .

[0019] Furthermore, the thickness of the reference adhesive 14 is controlled by a steel ball; wherein the diameter of the steel ball ranges from 1 mm to 2 mm.

[0020] Through the composite material and metal peel strength test device provided in this embodiment, the first column 2 and the second column 3 can be fixed at both ends of the metal base 1, and the first clamping rod 4 can be passed through the first column 2 and moved axially on the first column 2, and the second clamping rod 5 can be passed through the second column 3 and moved axially on the second column 3. Therefore, the first clamping rod 4 and the second clamping rod 5 can be moved axially respectively, thereby changing the distance between the first metal joint 6 and the second metal joint 7, and ensuring that the thickness of the adhesive to be tested 12 can be adjusted during the sample production process to test the influence of the thickness of the adhesive to be tested 12 on the interface peel strength. The contact surface of the second metal joint 7 is larger than the contact surface with the first metal joint 6, which can ensure that the failure position of the sample during the test occurs on the contact surface between the first metal joint 6 and the composite material plate. In addition, the first metal joint 6 and the first clamping rod 4 are detachably connected, which is convenient for replacing the first metal joint 6 of different materials according to test requirements, thereby improving the practicality of the device and making operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 1 is a front view schematic diagram of a composite material and metal peel strength test device provided in an embodiment of the present application;

[0023] Figure 2 It is aimed at Figure 1 Axonometric diagram provided;

[0024] Figure 3 It is aimed at Figure 1 Bottom schematic provided;

[0025] Reference numerals:

[0026] 1-metal base; 2-first column; 3-second column; 4-first clamping rod; 5-second clamping rod;

[0027] 6-first metal joint; 7-second metal joint; 8-first baffle; 9-second baffle; 10-positioning pad; 11-positioning bolt; 12-adhesive to be tested; 13-composite material plate; 14-reference adhesive; 15-positioning screw; 16-fixing screw. DETAILED DESCRIPTION

[0028] The exemplary embodiments of the present application will be described in more detail below in conjunction with the accompanying drawings in the embodiments of the present application. Although the accompanying drawings show exemplary embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0029] In response to the problems of the background technology, this embodiment provides a composite material and metal peel strength testing device, which can adapt to molds of different metal materials and achieve precise control of the bonding thickness of the test piece, thereby reducing human errors in the manufacturing process of the normal peel strength test piece between the composite material and the first metal joint surface, and improving the accuracy and repeatability of the test results.

[0030] Reference Figure 1 , Figure 1 : is a schematic front view of a composite material and metal peeling strength test device provided in an embodiment of the present application; Figure 1 It can be seen that the composite material and metal peel strength test device includes:

[0031] A metal base 1; a first column 2 and a second column 3, wherein the first column 2 and the second column 3 are respectively fixed at the two ends of the metal base 1; a first clamping rod 4 and a second clamping rod 5, wherein the first clamping rod 4 passes through the first column 2 and moves axially on the first column 2, and the second clamping rod 5 passes through the second column 3 and moves axially on the second column 3; a first metal joint 6, which is detachably connected to the first clamping rod 4; a second metal joint 7, which is fixedly connected to the second clamping rod 5; a first baffle 8 and a second baffle 9; wherein the first baffle 8 is sleeved between the first clamping rod 4 and the first metal joint 6, and the second baffle 9 is sleeved between the second clamping rod 5 and the second metal joint 7; wherein the contact surface of the second metal joint 7 is larger than the contact surface of the first metal joint 6.

[0032] In this embodiment, combined with Figure 1It can be seen that the first column 2 and the second column 3 respectively fix the two ends of the metal base 1. Specifically, they can be fixed to the two ends of the metal base 1 by bolt connection, welding, slot insertion, threaded connection, flange connection or adhesive fixation, etc., to ensure that the connection is firm and reliable. This embodiment does not limit the fixing method. The first column 2 and the second column 3 play a supporting and guiding role. It can provide vertical support for the first clamping rod 4 and the second clamping rod 5 to ensure that the first clamping rod 4 and the second clamping rod 5 can move axially during sample preparation. The first clamping rod 4 passes through the first column 2 and moves axially on the first column 2. The second clamping rod 5 passes through the second column 3 and moves axially on the second column 3, which facilitates the adjustment of the spacing between the first metal joint 6 and the second metal joint 7, thereby changing the thickness of the adhesive 12 to be tested during the production process.

[0033] Secondly, the first metal joint 6 and the first clamping rod 4 are connected in a detachable manner, and the first metal joint 6 of different materials can be replaced to adapt to different testing requirements, thereby improving the practicality of the device. In addition, the second metal joint 7 is fixedly connected to the second clamping rod 5, wherein the contact surface of the second metal joint 7 is larger than the contact surface of the first metal joint 6, which can ensure that the failure position of the sample during the test occurs on the contact surface between the first metal joint 6 and the composite material plate 13.

[0034] The first baffle 8 is sleeved between the first clamping rod 4 and the first metal joint 6, and the second baffle 9 is sleeved between the second clamping rod 5 and the second metal joint 7. The arrangement of the first baffle 8 and the second baffle 9 ensures that the positions of the first metal joint 6 and the second metal joint 7 remain adjustable during the specimen fabrication process, thus avoiding fabrication errors caused by the lack of a glue layer thickness control device in conventional devices.

[0035] In addition, fixing screws 16 are respectively provided on the first column 2 and the second column 3. The fixing screws 16 can fix the positions of the first clamping rod 4 and the second clamping rod 5 so that the first clamping rod 4 and the second clamping rod 5 remain stable during the specimen manufacturing process.

[0036] By fixing the first column 2 and the second column 3 at both ends of the metal base 1, and passing the first clamping rod 4 through the first column 2 and moving axially on the first column 2, and the second clamping rod 5 passing through the second column 3 and moving axially on the second column 3, the first clamping rod 4 and the second clamping rod 5 can be moved axially respectively, thereby changing the distance between the first metal joint 6 and the second metal joint 7, and ensuring that the thickness of the adhesive 12 to be tested can be adjusted during the production process of the sample. The contact surface of the second metal joint 7 is larger than the contact surface with the first metal joint 6, which can ensure that the failure position of the sample during the test occurs on the contact surface between the first metal joint 6 and the composite material plate 13. In addition, the first metal joint 6 and the first clamping rod 4 are detachably connected, which is convenient for replacing the first metal joint 6 of different materials according to test requirements, thereby improving the practicality of the device.

[0037] In a specific embodiment, the first baffle 8 and the second baffle 9 are respectively provided with a first opening, and the first opening of the first baffle 8 and the first opening of the second baffle 9 are coaxially arranged.

[0038] In this embodiment, referring to Figure 2 , Figure 2 It is aimed at Figure 1 The axonometric diagram provided is from Figure 2 It can be seen that the first baffle 8 and the second baffle 9 are respectively provided with a first opening, and the first opening of the first baffle 8 is coaxially arranged with the first opening of the second baffle 9. The first baffle 8 is sleeved on the first clamping rod 4 and the first metal joint 6 through the first opening, and the second baffle 9 is sleeved on the second clamping rod 5 and the second metal joint 7 through the second opening, which can ensure that the centers of the first metal joint 6 and the second metal joint 7 are on the same horizontal line, avoiding eccentricity in the sample production process and improving the accuracy of the sample tensile test and the reliability of the results.

[0039] In a specific embodiment, the first baffle 8 and the second baffle 9 are further provided with a plurality of second openings respectively, and the second openings of the first baffle 8 and the second openings of the second baffle 9 are coaxially arranged.

[0040] In this embodiment, the coaxial arrangement of the plurality of second openings can evenly distribute the stress points and enhance the connection strength between the baffles.

[0041] In a specific embodiment, it further includes a plurality of positioning bolts 11 ; wherein the plurality of positioning bolts 11 are arranged on a plurality of coaxial second openings between the first baffle 8 and the second baffle 9 .

[0042] In this embodiment, a plurality of positioning bolts 11 are included, and the positioning bolts 11 are set between the first baffle 8 and the second baffle 9 through the second opening. The spacing between the first baffle 8 and the second baffle 9 can be changed by rotating the positioning bolts 11, so as to fix the spacing between the first metal joint 6 and the second metal joint 7.

[0043] In a specific embodiment, a plurality of positioning pads 10 are further included; wherein the plurality of positioning pads 10 are arranged between the first baffle 8 and the second baffle 9 .

[0044] In this embodiment, it also includes multiple positioning pads 10, and multiple positioning pads 10 are arranged between the first baffle 8 and the second baffle 9. The positioning pads 10 can control the thickness of the adhesive 12 to be tested. Since the positioning bolts 11 are used to fix the first baffle 8 and the second baffle 9, but in actual application, the positioning bolts 11 fix the first baffle 8 and the second baffle 9, which is not the only fixed distance. Specifically, the distance between the first baffle 8 and the second baffle 9 can be changed according to the rotation direction of the positioning bolts 11. Therefore, in order to fix the distance between the first baffle 8 and the second baffle 9 unchanged, multiple positioning pads 10 can be provided between the first baffle 8 and the second baffle 9. Multiple positioning pads 10 can form resistance between the first baffle 8 and the second baffle 9, preventing the positioning bolts 11 from continuously changing the distance between the first baffle 8 and the second baffle 9, thereby keeping the distance between the first baffle 8 and the second baffle 9 unchanged, which is convenient for subsequent limitation of the thickness of the adhesive to be tested. Secondly, the positioning pads 10 arranged on the contact surfaces of the first baffle 8 and the second baffle 9 can also be replaced, thereby changing the distance between the first baffle 8 and the second baffle 9 .

[0045] Regarding the position of the positioning pad 10, it can be specifically set on the contact surface relative to the first baffle 8 and the second baffle 9, or it can be set in the edge area of the first baffle 8 and the second baffle 9. Setting the positioning pad 10 in the edge area of the baffle can ensure that a fixed distance is maintained between the first baffle 8 and the second baffle 9.

[0046] In a specific embodiment, the first column 2 and the second column 3 are respectively provided with a third opening, and the third opening of the first column 2 and the third opening of the second column 3 are coaxially arranged.

[0047] In this embodiment, combined with Figure 1 and Figure 2 The first clamping rod 4 can pass through the first column 2 through the third opening of the first column 2, and the second clamping rod 5 can pass through the second column 3 through the third opening of the second column 3. Since the third opening of the first column 2 and the third opening of the second column 3 are coaxially arranged, it can be ensured that the axes of the first clamping rod 4 and the second clamping rod 5 are aligned during the sample production process.

[0048] In a specific embodiment, the metal base 1 is fixedly connected to the first column 2 and the second column 3 respectively through positioning screws 15.

[0049] In this embodiment, referring to Figure 3 , Figure 3 It is aimed at Figure 1 The bottom diagram provided, from Figure 3 As can be seen from the figure, the metal base 1 can be fixedly connected to the first column 2 and the second column 3 respectively through positioning screws 15.

[0050] In a specific embodiment, referring to Figure 1 The first metal joint 6 is bonded to one side of the composite material plate 13 through the adhesive to be tested 12, and the second metal joint 7 is bonded to the other side of the composite material plate 13 through the reference adhesive 14; wherein the peel strength of the adhesive to be tested 12 is unknown, and the peel strength of the reference adhesive 14 is known.

[0051] In this embodiment, referring to Figure 1 It can be seen that the composite material plate 13 is arranged between the first metal joint 6 and the second metal joint 7, and one side of the composite material plate 13 is connected to the first metal joint 6 via the adhesive to be tested 12, and the other side of the composite material plate 13 is connected to the second metal joint 7 via the reference adhesive 14. The reference adhesive 14 can be a ductile adhesive, which has a high interfacial fracture toughness and can provide better bonding strength during the bonding process. This embodiment does not limit the type of the reference adhesive 14, as long as it satisfies the requirement that the reference adhesive 14 will not peel off from the surface of the composite material plate 13 or the second metal joint 7 in the subsequent test of the peel strength of the adhesive to be tested 12.

[0052] In a specific embodiment, the thickness of the reference adhesive 14 is greater than the thickness of the adhesive to be tested 12 .

[0053] In this embodiment, the thickness of the reference adhesive 14 is greater than the thickness of the adhesive to be tested 12, which can make the bonding performance of the reference adhesive 14 more stable and better withstand the peeling load during the tensile test, thereby avoiding the reference adhesive 14 being peeled off from the surface of the composite material plate 13 or the second metal joint 7 before the adhesive to be tested 12 during the test due to insufficient thickness of the reference adhesive 14, thereby being detrimental to the peel strength test results of the adhesive to be tested 12.

[0054] In a specific embodiment, the thickness of the reference adhesive 14 is controlled by a steel ball; wherein the diameter of the steel ball ranges from 1 mm to 2 mm.

[0055] In this embodiment, by evenly distributing steel balls with a diameter of 1mm~2mm in the reference adhesive 14, the thickness of the reference adhesive 14 can be ensured to be consistent, reducing the instability of the peeling performance of the reference adhesive 14 caused by uneven thickness. Secondly, the thickness of the adhesive to be tested 12 is not controlled by steel balls, avoiding the presence of steel balls in the adhesive to be tested 12. The performance of the adhesive to be tested 12 is affected, thereby reducing the accuracy and reliability of the test results.

[0056] For example, the following will be combined with Figure 1-Figure 3 The process of testing the peel strength of the adhesive 12 to be tested by the composite material and metal peel strength test device provided in this embodiment is described in detail:

[0057] First, a sample is made. The sample in this embodiment includes: a first clamping rod 4, a second clamping rod 5, a first metal joint 6, a second metal joint 7, an adhesive to be tested 12, a composite material plate 13 and a reference adhesive 14. The description of the samples in other places is referred to here and will not be repeated here.

[0058] The first metal joint 6 is bonded to the composite material plate 13 by the adhesive to be tested 12, and then the second metal joint 7 is bonded to the composite material plate 13 by the reference adhesive 14. The first clamping rod 4 and the second clamping rod 5 are respectively installed on the first column 2 and the second column 3 to keep the centers of the first metal joint 6 and the second metal joint 7 on the same horizontal line. The thickness of the adhesive to be tested 12 is controlled by the first baffle 8, the second baffle 9, and the positioning pad 10. After waiting for the adhesive to be tested 12 and the reference adhesive 14 to solidify, the first baffle 8, the second baffle 9, the positioning pad 10, the first column 2 and the second column 3 are removed, the prepared sample is removed, and the first clamping rod 4 is moved in a direction away from the second clamping rod 5 by a tensile testing machine to test the peel strength between the first metal joint 6 bonded by the adhesive to be tested 12 and the composite material plate 13.

[0059] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0060] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0061] Finally, it should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0062] The above is a detailed introduction to a composite material and metal peel strength test device provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. At the same time, for general technicians in this field, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A composite material and metal peel strength test device, characterized in that: include: Metal base (1); A first column (2) and a second column (3), wherein the first column (2) and the second column (3) are respectively fixed at two ends of the metal base (1); a first clamping rod (4) and a second clamping rod (5), wherein the first clamping rod (4) passes through the first column (2) and moves axially on the first column (2), and the second clamping rod (5) passes through the second column (3) and moves axially on the second column (3); A first metal joint (6) is detachably connected to the first clamping rod (4); A second metal joint (7) is fixedly connected to the second clamping rod (5); A first baffle (8) and a second baffle (9); wherein the first baffle (8) is sleeved between the first clamping rod (4) and the first metal joint (6), and the second baffle (9) is sleeved between the second clamping rod (5) and the second metal joint (7); wherein the contact surface of the second metal joint (7) is larger than the contact surface of the first metal joint (6).

2. The composite material and metal peel strength testing device according to claim 1, characterized in that: The first baffle (8) and the second baffle (9) are respectively provided with a first opening and a positioning screw (15), and the first opening of the first baffle (8) and the first opening of the second baffle (9) are coaxially arranged.

3. The composite material and metal peel strength testing device according to claim 1, characterized in that: The first baffle (8) and the second baffle (9) are also respectively provided with a plurality of second openings, and the second openings of the first baffle (8) and the second openings of the second baffle (9) are coaxially arranged.

4. The composite material and metal peeling strength testing device according to claim 3, characterized in that: It also includes a plurality of positioning bolts (11); wherein the plurality of positioning bolts (11) are arranged on a plurality of coaxial second openings between the first baffle (8) and the second baffle (9).

5. The composite material and metal peeling strength testing device according to claim 3, characterized in that: It also includes a plurality of positioning pads (10); wherein the plurality of positioning pads (10) are arranged between the first baffle (8) and the second baffle (9).

6. The composite material and metal peel strength testing device according to claim 1, characterized in that: The first column (2) and the second column (3) are respectively provided with a third opening, and the third opening of the first column (2) and the third opening of the second column (3) are coaxially arranged.

7. The composite material and metal peel strength testing device according to claim 1, characterized in that: The metal base (1) is fixedly connected to the first column (2) and the second column (3) respectively via positioning screws (15).

8. The composite material and metal peeling strength testing device according to claim 1, characterized in that: The first metal joint (6) is bonded to one side of a composite material plate (13) via a test adhesive (12), and the second metal joint (7) is bonded to the other side of the composite material plate (13) via a reference adhesive (14); wherein the peel strength of the test adhesive (12) is unknown, and the peel strength of the reference adhesive (14) is known.

9. The composite material and metal peeling strength testing device according to claim 8, characterized in that: The thickness of the reference adhesive (14) is greater than the thickness of the adhesive to be tested (12).

10. The composite material and metal peeling strength testing device according to claim 9, characterized in that: The thickness of the reference adhesive (14) is controlled by using a steel ball; wherein the diameter of the steel ball ranges from 1 mm to 2 mm.

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