Shearing test device suitable for rigid substrates with different thicknesses to rigid or flexible materials

Abstract

The utility model relates to a shear test device suitable for rigid substrates with different thicknesses to rigid or flexible materials, the rigid substrates are bonded with a sheet made of the rigid or flexible materials from the front side, the shear test device comprises a tension component with a first clamping end and a second clamping end, the sheet is clamped on the first clamping end, and the second clamping end is connected with the tension component. The shear test device further comprises a connecting seat fixedly connected with the second clamping end, a positioning leaning grid movably connected to the connecting seat, and an abutting part with an abutting end part, wherein the rigid substrate abuts against the positioning leaning grid. On one hand, on the premise that the clamping force is not increased, the rigid substrate can be prevented from deviating in a test, and the accuracy of a test result is effectively improved; and on the other hand, the bonding surfaces of rigid substrates with different thicknesses and sheets are flexibly and accurately positioned in the stress direction by adjusting the positioning leaning grid, so that the shear test device is suitable for shear tests of materials with different specifications, and is high in practicability.

Description

Technical Field

[0001] The utility model belongs to the field of shearing test devices, in particular to a shearing test device which is suitable for rigid substrates with different thicknesses to test rigid or flexible materials. Background Art

[0002] The adhesion under shear state (roll material-substrate) in the standard JC / T 863-2011 (2023) "Polymer waterproof roll material adhesive" and the tensile shear strength test in JC / T 2186-2013 "Nail-free adhesive for lightweight decorative panels on interior walls" are generally tested using a traditional tensile testing machine, and the test steps are as follows: first, the sheet is bonded to the rigid substrate; then, the rigid substrate is fixed to the lower clamping end of the tensile testing machine, and the sheet is fixed to the upper clamping end of the tensile testing machine, and the bonding surface of the sheet and the rigid substrate is kept perpendicular to the tensile direction of the tensile testing machine; finally, the sheet and the substrate are pulled away from each other by the tensile testing machine to perform a shear test.

[0003] However, in the actual test process, the existing test device has the following defects:

[0004] 1. When the bonding force between the sheet and the substrate is slightly larger, the substrate is prone to slide upward, affecting the accuracy of the test results; and if measures are taken to increase the clamping force of the clamping end on the substrate, it is likely to cause damage to the substrate, resulting in the inability to continue the test;

[0005] 2. For substrates of different thicknesses, it is difficult to ensure that the bonding surface between the substrate and the sheet is precisely located on the central axis of the pull rod of the tensile testing machine. In this way, it is impossible to ensure that the direction of the force on the sheet and the substrate is perpendicular to the direction of the bonding surface, resulting in inaccurate test results. Summary of the invention

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an improved shear test device for rigid or flexible materials which is adaptable to rigid substrates of different thicknesses.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A shear test device suitable for rigid substrates of different thicknesses on rigid or flexible materials, wherein the rigid substrate is bonded to a sheet of rigid or flexible material from the front side, the shear test device comprises a tensile component having a first clamping end and a second clamping end, the sheet is clamped on the first clamping end, the shear test device also comprises a connecting seat fixedly connected to the second clamping end, a positioning grid movably connected to the connecting seat, and a top contact component having a top contact end, wherein the rigid substrate abuts against the positioning grid, and as the positioning grid moves, the front side of the rigid substrate keeps coincident with the center line of the first clamping end, during the test, the top contact end touches and presses the rigid substrate against the positioning grid, and a positioning area is formed between the connecting seat, the positioning grid, and the top contact end to limit the movement of the rigid substrate toward the first clamping end.

[0009] According to a specific implementation and preferred aspect of the utility model, the positioning grid is slidably connected to the connection seat along a direction perpendicular to the front side of the rigid base, thereby facilitating accurate control of the displacement of the front side of the rigid base, thereby improving the position accuracy of the rigid base.

[0010] Preferably, the positioning grid is L-shaped, and during the test, the rigid substrate is respectively against the positioning grid from two adjacent sides. Here, the positioning grid can be positioned in multiple directions, thereby improving the stability of the rigid substrate during the test.

[0011] Specifically, the positioning fence includes a first fence portion slidably connected to the connection seat from one end, and a second fence portion connected to the other end of the first fence portion. During the test, the rigid base is against the first fence portion from the back and against the second fence portion from the side. Here, the structure is simple, and it is easy to process and implement.

[0012] Furthermore, the first fence portion is arranged parallel to the back surface of the rigid base; and / or the second fence portion is arranged perpendicular to the front surface of the rigid base. Here, the first fence portion and the second fence portion can fit with the corresponding surface on the rigid base, thereby avoiding deformation of the rigid base during the fixing process.

[0013] Preferably, an adjustment channel is formed on the first backing grid portion, and the second backing grid portion is inserted into the adjustment channel and can be moved along a direction perpendicular to the front surface of the rigid base; the positioning backing grid also includes a locking member for locking or unlocking the first backing grid portion relative to the second backing grid portion. Here, the position of the second backing grid portion is conveniently adjusted to adapt to rigid bases of different thicknesses.

[0014] Preferably, during the test, the center line of the front surface of the rigid base coincides with the center line of the first clamping end.

[0015] According to another specific implementation and preferred aspect of the utility model, the top contact component includes a fixed seat fixed on the connecting seat and arranged side by side with the positioning grid, and a top contact piece movably connected to the fixed seat along a direction perpendicular to the front side of the rigid base and having a top contact end. Here, the structure is simple and easy to install and implement.

[0016] Preferably, the top contact piece can be movably connected to the fixing seat in a direction close to or away from the first clamping end, or there are multiple top contact pieces, and during the test, the corresponding top contact piece contacts the front surface of the rigid base and is offset from the sheet. Here, according to the bonding position of the sheet on the rigid base of different specifications, the position of the top contact piece is adjusted or the corresponding top contact piece is selected, so that when the top contact piece contacts the front surface of the rigid base, the top contact piece and the sheet are offset, thereby avoiding the top contact piece from pressing on the sheet.

[0017] Preferably, the top contact end surface formed by the top contact end portion is circular or rectangular.

[0018] In addition, the second clamping end is located directly above the first clamping end. Here, after the clamping is completed, the rigid base is hung upside down on the second clamping end, and under its own weight, the lower side of the rigid base can always be kept against the positioning grid to form a position, and the test personnel can directly start the machine to conduct the test, which can ensure the accuracy of the test results, and the operation is simple and convenient.

[0019] Due to the implementation of the above technical solution, the utility model has the following advantages compared with the prior art:

[0020] In the shear test of the prior art, if the bonding force between the sheet and the base is slightly large, the base may easily slip, thereby affecting the accuracy of the test results; and if the clamping force on the base is increased, the base may be easily damaged, resulting in the inability to conduct the test. At the same time, for bases of different thicknesses, it is difficult to control the bonding surface to be perpendicular to the force direction. The present application designs an overall structure of a shear test device for rigid or flexible materials that is adaptable to rigid bases of different thicknesses, ingeniously solving the deficiencies and defects of the prior art. After adopting the shear test device, a sheet made of a rigid or flexible material is clamped on the first clamping end of the tension component, and then the rigid base is pressed against the positioning grid, and the front side of the rigid base is aligned with the first clamping end of the tension component through the displacement of the positioning grid. The center lines of one clamping end are kept coincident, and the rigid base is pressed by the top contact component, so that a positioning area is formed between the connecting seat, the positioning grid, and the top contact end to limit the movement of the rigid base toward the first clamping end, so as to realize the relative positioning of the rigid base and the second clamping end, and finally the first clamping end and the second clamping end are driven away from each other by the tension component to carry out a shear test; therefore, compared with the prior art, on the one hand, the utility model can avoid the displacement of the rigid base during the test without increasing the clamping force, thereby effectively improving the accuracy of the test results; on the other hand, by adjusting the positioning grid, it is flexible to realize that the bonding surfaces of rigid bases of different thicknesses and sheets are accurately located in the force direction, which is suitable for shear tests of materials of different specifications and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 It is a front view schematic diagram of the shear test device of the utility model that is suitable for rigid substrates of different thicknesses to rigid or flexible materials (the tension component is partially omitted);

[0023] Figure 2 for Figure 1 Schematic diagram of the left side (partially omitted);

[0024] Figure 3 It is a schematic diagram of the structure of the test piece of the utility model;

[0025] Wherein 1, tension member; 11, first clamping end; 12, second clamping end;

[0026] 2. Connecting seat;

[0027] 3. Positioning fence; 31. First fence portion; t. Adjustment channel; 32. Second fence portion; 33. Locking member;

[0028] 4. top contact component; 40. fixing seat; 41. top contact piece; d. top contact end; q. positioning area;

[0029] A. Rigid matrix; B. Sheet. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0035] like Figures 1 to 3 As shown, the present embodiment relates to a shear test device for rigid or flexible materials that is adaptable to rigid substrates of different thicknesses, which includes a tension component 1, a connecting seat 2, a positioning grid 3, and a top contact component 4; the rigid substrate A involved in the present embodiment is bonded to a sheet B made of a rigid or flexible material from the front to form a test piece, wherein the rigid substrate A is a rectangular parallelepiped.

[0036] Specifically, the tension component 1 is a conventional tensile machine, which has a first clamping end 11 and a second clamping end 12, wherein the second clamping end 12 is located directly above the first clamping end 11, and the sheet B is clamped and fixed on the first clamping end 11. It should be particularly noted that the sheet B is fixed on the first clamping end 11 by conventional technical means such as positioning pins, and the sheet B will not slip during the test.

[0037] In this example, the connecting seat 2 is fixedly connected to the second clamping end 12 through a conventional connecting piece; the positioning grid 3 is movably connected to the bottom surface of the connecting seat 2, and the rigid base A rests on the positioning grid 3, and as the positioning grid 3 moves, the positioning grid 3 drives the front side of the rigid base A to coincide with the center line of the first clamping end 11 and the second clamping end 12. In some specific embodiments, during the test, the center line of the front side of the rigid base A coincides with the center line of the first clamping end 11 and the second clamping end 12.

[0038] The positioning guardrail 3 is L-shaped and is slidably connected to the connecting seat along a direction perpendicular to the front face of the rigid base A. During the test, the rigid base A rests against the positioning guardrail 3 from two adjacent side faces respectively; in some specific embodiments, the positioning guardrail 3 includes a first guardrail portion 31 slidably connected to the connecting seat 2 from one end, and a second guardrail portion 32 connected to the other end of the first guardrail portion 31, wherein the first guardrail portion 31 is arranged parallel to the back face of the rigid base A, and the second guardrail portion 32 is arranged perpendicular to the front face of the rigid base A. During the test, the rigid base A rests against the first guardrail portion 31 from the back face, against the second guardrail portion 32 from the lower side face, and against the bottom face of the connecting seat 2 from the upper side face; as for the sliding connection structure between the first guardrail portion 31 and the connecting seat 2, it is a conventional technical means and will not be elaborated here, but it is also clearly implementable. At the same time, the first guardrail portion 31 is locked or unlocked with the connecting seat 2 by a locking bolt.

[0039] For the convenience of implementation, an adjustment channel t matching the second guard portion 32 is formed at the lower end of the first guard portion 31, and the second guard portion 32 is inserted into the adjustment channel t and can be moved along a direction perpendicular to the front direction of the rigid base A; the positioning guard 3 also includes a locking member 33 for relatively locking or unlocking the first guard portion 31 and the second guard portion 32, wherein the locking member 33 adopts a locking bolt and is connected to the lower end of the first guard portion 31.

[0040] In this example, the top contact component 4 has a top contact end d. During the test, the top contact end d touches and presses the rigid base A against the positioning grid 3, and a positioning area q is formed between the connecting seat 2, the positioning grid 3, and the top contact end d to limit the movement of the rigid base A toward the first clamping end 11.

[0041] The top contact component 4 includes a fixed seat 40 fixed on the connecting seat 2 and arranged side by side with the positioning grid 3, and a top contact piece 41 movably connected to the fixed seat 40 along a direction perpendicular to the front face of the rigid base A and having a top contact end d; the top contact piece 41 is threadedly connected to the fixed seat 40, and the top contact end face formed by the top contact end d is circular or rectangular, and when in contact, the top contact end face of the top contact end d is in contact with the front face of the rigid base A, and the contact position is above the sheet B. At the same time, in the present embodiment, there are multiple top contacts 41 which are arranged at intervals up and down. During the test, according to the bonding position of the sheet B on the front side of the rigid base A, the corresponding top contacts are in contact with the front side of the rigid base and are staggered with the sheet. In other specific embodiments, the top contacts 41 can be movably connected to the fixed seat 40 in a direction close to or away from the first clamping end 11 (i.e., in the up and down directions). For example, a guide groove extending up and down is provided on the fixed seat 40, and the top contacts 41 are inserted into the guide groove. During the test, according to the bonding position of the sheet B on the front side of the rigid base A, the top contacts 41 are adjusted up and down to be staggered with the sheet B up and down, and when the top contacts 41 are in contact with the front side of the rigid base A, the top contacts 41 are fixed relatively to the fixed seat 40 by conventional fasteners.

[0042] In summary, after adopting the shear test device, a sheet made of a rigid or flexible material is clamped on the first clamping end of the tension component, and then the rigid base is pressed against the positioning grid. The front side of the rigid base is kept coincident with the center line of the first clamping end through the displacement of the positioning grid, and the rigid base is pressed by the top contact component, so that a positioning area is formed between the connecting seat, the positioning grid, and the top contact end to limit the movement of the rigid base toward the first clamping end, so as to realize the relative positioning of the rigid base and the second clamping end, and finally the first clamping end and the second clamping end are driven away from each other by the tension component to carry out a shear test; therefore, compared with the prior art, the utility model can, on the one hand, avoid the displacement of the rigid base during the test without increasing the clamping force, and effectively improve the accuracy of the test results; on the other hand, by adjusting the positioning grid, it is flexibly realized that the bonding surface of the rigid base and the sheet of different thicknesses is accurately located in the force direction, which is suitable for shear tests of materials of different specifications and has strong practicality; thirdly, by positioning the grid along a direction perpendicular to the front side of the rigid base The first and second grid parts can be fitted with the corresponding surfaces on the rigid base to avoid deformation of the rigid base during the fixing process; the sixth aspect is to facilitate the adjustment of the position of the second grid part to adapt to rigid bases of different thicknesses; the seventh aspect is that after the clamping is completed, the rigid base is hung upside down on the second clamping end, and under its own weight, the lower side of the rigid base can always be kept against the positioning grid to form a position, and the test personnel can directly start the test, which can ensure the accuracy of the test results, and the operation is simple and convenient; the eighth aspect is that according to the bonding position of the sheet on the rigid base of different specifications, by adjusting the position of the top contact or selecting the corresponding top contact, when the top contact contacts the front of the rigid base, the top contact and the sheet are staggered, thereby avoiding the top contact pressing on the sheet.

[0043] The above detailed description of the utility model is intended to enable people familiar with the technology in this field to understand the content of the utility model and implement it. It is not intended to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A shear test device for rigid substrates of different thicknesses to rigid or flexible materials, wherein the rigid substrate is bonded to a sheet of rigid or flexible material from the front side, the shear test device comprises a tension member having a first clamping end and a second clamping end, the sheet being clamped on the first clamping end, characterized in that: The shear test device also includes a connecting seat fixedly connected to the second clamping end, a positioning grid movably connected to the connecting seat, and a top contact component with a top contact end, wherein the rigid base abuts against the positioning grid, and as the positioning grid moves, the front side of the rigid base keeps coincident with the center line of the first clamping end; during the test, the top contact end contacts and presses the rigid base against the positioning grid, and a positioning area is formed between the connecting seat, the positioning grid, and the top contact end to limit the rigid base from moving toward the first clamping end.

2. The shear test device for rigid or flexible materials adapted to different thicknesses of rigid substrates according to claim 1, characterized in that: The positioning grid is slidably connected to the connection seat along a direction perpendicular to the front side of the rigid base.

3. The shear test device for rigid or flexible materials adapted to different thicknesses of rigid substrates according to claim 1, characterized in that: The positioning grid is L-shaped. During the test, the rigid base rests against the positioning grid from two adjacent side surfaces.

4. The shear test device for rigid or flexible materials adapted to different thicknesses of rigid substrates according to claim 3, characterized in that: The positioning guardrail includes a first guardrail portion slidably connected to the connecting seat from one end and a second guardrail portion connected to the other end of the first guardrail portion. During the test, the rigid base rests against the first guardrail portion from the back and against the second guardrail portion from the side.

5. The shear test device for rigid or flexible materials adapted to rigid substrates of different thicknesses according to claim 4, characterized in that: The first fence portion is arranged parallel to the back surface of the rigid base; and / or the second fence portion is arranged perpendicular to the front surface of the rigid base.

6. The shear test device for rigid or flexible materials adapted to different thicknesses of rigid substrates according to claim 4, characterized in that: An adjustment channel is formed on the first guardrail portion, the second guardrail portion is inserted into the adjustment channel and can be moved along a direction perpendicular to the front side of the rigid base; the positioning guardrail also includes a locking member for relatively locking or unlocking the first guardrail portion and the second guardrail portion.

7. The shear test device for rigid or flexible materials adapted to different thicknesses of rigid substrates according to claim 1, characterized in that: During the test, the center line of the front surface of the rigid base coincides with the center line of the first clamping end.

8. The shear test device for rigid or flexible materials adapted to rigid substrates of different thicknesses according to claim 1, characterized in that: The top contact component includes a fixing seat fixed on the connecting seat and arranged side by side with the positioning grid, and a top contact piece movably connected to the fixing seat along a direction perpendicular to the front side and having the top contact end.

9. The shear test device for rigid or flexible materials adapted to rigid substrates of different thicknesses according to claim 8, characterized in that: The top contact piece can be movably connected to the fixed seat in a direction close to or away from the first clamping end, or there are multiple top contact pieces, and during testing, the corresponding top contact pieces abut against the front side of the rigid base and are offset from the sheet; and / or the top contact end face formed by the top contact end portion is circular or rectangular.

10. The shear test device for rigid or flexible materials adapted to rigid substrates of different thicknesses according to any one of claims 1 to 9, characterized in that: The second clamping end is located directly above the first clamping end.

Images