Constant-pressure rubber shearing sample piece preparation device

Abstract

The utility model discloses a constant pressure glue shearing sample piece preparation device, which belongs to the technical field of shearing sample piece manufacture, and comprises a base and a pressing component, the pressing component is movably connected to one side of the base, the base is provided with a groove, a supporting ejector rod is arranged in the groove, and the supporting ejector rod is used for supporting glue joint ends of two shearing sample pieces; the pressing assembly is matched with the supporting ejector rod to press the glue joint ends of the two shearing sample pieces, and the supporting ejector rod and the pressing assembly are in point contact with the glue joint ends of the two shearing sample pieces. According to the utility model, the supporting ejector rod and the pressing assembly form point contact with the cementing ends of the two sheared sample pieces, so that the error generated when the supporting ejector rod and the pressing assembly press the cementing ends can be reduced, and the thickness of colloid is easier to control when the sample pieces are pressed.

Description

Technical Field

[0001] The utility model relates to the technical field of shearing sample production, in particular to a constant pressure adhesive shearing sample production device. Background Art

[0002] The shear test is one of the standard tests for obtaining the mechanical properties of adhesive materials. The thickness of the colloid in the sample, the parallelism of the metal test piece and other process parameters have a great influence on the test results. Therefore, designing a tooling device to position and fix the metal test piece to facilitate rapid sample preparation is of great significance for obtaining reliable colloid curing results.

[0003] However, in the prior art, the shearing sample preparation method of the colloid is mostly to place the first sample in the sample preparation mold, apply glue, and press the second sample on the first sample to prepare the sample. The sample preparation efficiency is low and the sample preparation thickness cannot be controlled. There is also a method in the prior art that uses a metal wire to control the thickness of the glue layer to prepare the sample. First, the metal wire in this method may affect the experimental data. Second, the thickness of the glue layer cannot be well controlled. Third, the sample preparation repeatability is poor, and the prepared samples cannot meet the test requirements.

[0004] For example, the Chinese patent document with publication number CN115782206A discloses a tooling for preparing glue samples and a preparation method thereof, including a fixed base for fixing and supporting the entire tooling, a longitudinal beam groove for fixing a pressing assembly, and a pressing assembly for pressing the sample, the fixed base includes a bottom plate and a side plate, the longitudinal beam groove is arranged on the inner side of the side plate, the pressing assembly is arranged above the bottom plate and the sample, the pressing assembly includes a pressing block and a stop bar, the two ends of the pressing block are stuck in the longitudinal beam groove, the stop bar is arranged above the pressing block, and the stop bar is arranged on the inner side of the side of the fixed base. This invention can batch prepare glue shearing samples with consistent pressure, and the glue shearing samples can be conveniently scraped, improve work efficiency, and have a simple structure. However, the pressing assembly of this invention is mainly a pressing block, and the pressing block cooperates with the bottom plate to press the sample, and has very high requirements for the flatness and parallelism of the pressing block and the bottom plate, and there may be processing errors between the pressing block and the bottom plate, and it is difficult to control the thickness of the colloid when pressing the sample. Utility Model Content

[0005] The utility model aims to provide a constant pressure glue shearing sample preparation device to solve the problem that the pressing block and the bottom plate of the sample preparation device in the prior art may have processing errors and it is difficult to control the thickness of the glue when pressing the sample.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a constant pressure glue shear sample preparation device, including a base and a pressing assembly, the pressing assembly is movably connected to one side of the base, the base is provided with a groove, a supporting top rod is provided in the groove, the supporting top rod is used to support the glued ends of two shear samples; the pressing assembly cooperates with the supporting top rod to press the glued ends of the two shear samples, and the supporting top rod and the pressing assembly both form point contact with the glued ends of the two shear samples.

[0007] Furthermore, the top of the support push rod is hemispherical or spherical, and the top of the support push rod contacts the bottom of one of the shear specimens; the pressing assembly includes a main pressing rod and a secondary pressing rod, the end of the main pressing rod is hemispherical or spherical, and the end of the main pressing rod contacts the top of the other shear specimen.

[0008] Furthermore, the auxiliary pressing rods are distributed on both sides of the main pressing rod, and the auxiliary pressing rods are pressed with the non-glued ends of the shear specimens.

[0009] Furthermore, the base is provided with a guide post, the guide post passes through the through hole of the non-gluing end of the shearing sample, and the guide post is used to limit the non-gluing end of the shearing sample.

[0010] Furthermore, the free end of the secondary pressing rod is a semi-cylindrical structure, and the cylindrical surface of the semi-cylinder contacts the shear sample.

[0011] Furthermore, an axial hole penetrating the base is opened on one side of the base, a rotating shaft is arranged in the axial hole, the main pressing rod and the auxiliary pressing rod are connected to the base through the rotating shaft, a torsion device is connected between the main pressing rod, the auxiliary pressing rod and the base, and the torsion device provides torque for the main pressing rod and the auxiliary pressing rod to press the shear specimen.

[0012] Furthermore, it also includes a plurality of cushion blocks, one of which is arranged between the upper surface of the base and the bottom surface of the shearing sample, and one of which is arranged between the bottom surface of the auxiliary pressing rod and the top surface of the shearing sample.

[0013] Furthermore, colloid and copper wire are arranged between the glued ends of the two shear specimens, and the copper wire is used to control the pressing thickness of the colloid.

[0014] Furthermore, a plurality of side baffles are provided on the edge of the upper surface of the base, and the side baffles are used to position the shearing sample.

[0015] Furthermore, a plurality of the side baffles are distributed on the base on both sides of the groove, each of the side baffles is provided with a U-shaped groove penetrating the side baffle, and the side baffles are connected to the base via the U-shaped groove and bolts.

[0016] Compared with the existing known technologies, the technical solution provided by the utility model has the following beneficial effects:

[0017] The utility model discloses a constant pressure glue shear sample preparation device, which forms point contact between the glued ends of two shear samples through a supporting push rod and a pressing assembly, thereby providing pressure and supporting force for the glued ends. Compared with the traditional pressing block and bottom plate structure, there is no need to consider the flatness of the supporting push rod and the pressing assembly, which can reduce the error of the supporting push rod and the pressing assembly when pressing the glued ends, and it is easier to control the thickness of the glue when the samples are pressed.

[0018] It will be apparent that elements or features described above in the context of a single embodiment may be used alone or in combination in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the drawings, the sizes and proportions do not represent the sizes and proportions of actual products. The drawings are merely illustrative, and some non-essential elements or features are omitted for clarity.

[0020] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model (without sample installed);

[0021] Figure 2 It is a structural schematic diagram of an embodiment of the utility model (installation sample);

[0022] Figure 3 It is a structural schematic diagram of the state of the pressing assembly pressing a sample in an embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the shearing sample in the embodiment of the utility model.

[0024] Description of Reference Numerals

[0025] 100, base; 110, groove; 120, rotating shaft; 130, torsion device; 140, guide column; 200, pressing assembly; 210, main pressing rod; 220, auxiliary pressing rod; 300, supporting top rod; 400, shearing sample; 410, copper wire; 420, through hole; 500, side baffle; 510, U-shaped groove; 600, bolt; 700, spacer; 800, colloid. DETAILED DESCRIPTION

[0026] The present invention will be described in detail with reference to the accompanying drawings. What is described here is only a preferred embodiment of the present invention, and those skilled in the art can think of other ways to implement the present invention based on the preferred embodiment, and other ways also fall within the scope of the present invention.

[0027] Example

[0028] Reference Figure 1-Figure 4 The present embodiment provides a constant pressure glue shear specimen preparation device, including a base 100 and a pressing assembly 200, wherein the pressing assembly 200 is movably connected to one side of the base 100, and the pressing assembly 200 can move on the base 100. The base 100 is provided with a groove 110, and a supporting top rod 300 is provided in the groove 110, and the supporting top rod 300 is used to support the glued ends of two shear specimens 400. The groove 110 divides the base 100 into two parts, and also provides an installation space for the supporting top rod 300. The pressing assembly 200 cooperates with the supporting top rod 300 to press the glued ends of the two shear specimens 400, and the supporting top rod 300 and the pressing assembly 200 both form point contact with the glued ends of the two shear specimens 400. The supporting top rod 300 and the pressing assembly 200 provide pressure and support force for the glued ends of the two shear samples 400 in the form of point support. Compared with the traditional pressing block and base plate structure, there is no need to consider the flatness of the supporting top rod 300 and the pressing assembly 200, which can reduce the error of the supporting top rod 300 and the pressing assembly 200 when pressing the glued ends, and it is easier to control the thickness of the colloid 800 when the samples are pressed.

[0029] It should be noted that colloid 800 and copper wire 410 are arranged between the glued ends of the two shearing specimens 400, and the copper wire 410 is used to control the pressing thickness of the colloid 800. The thickness of the colloid 800 is determined according to the diameter of the copper wire 410, and the design value of the copper wire 410 is the pressing thickness value of the colloid 800. The existence of the copper wire 410 can ensure the consistency of the thickness of the colloid 800 to the greatest extent and reduce the thickness variation of the colloid 800 during the curing process. At the same time, the supporting top rod 300 and the pressing assembly 200 are in contact with the shearing specimen 400 in the form of point support, and the supporting top rod 300 is arranged in the groove 110. After the colloid 800 is applied, there is enough space around the colloid 800 to remove the overflowed glue. In this embodiment, the shearing specimen 400 uses a metal test piece.

[0030] Specifically, in this embodiment, Figure 1 and Figure 3 As shown, the top of the supporting top rod 300 is hemispherical or spherical, and the top of the supporting top rod 300 contacts the bottom of one of the shearing samples 400. The pressing assembly 200 includes a main pressing rod 210 and a secondary pressing rod 220, and the end of the main pressing rod 210 is hemispherical or spherical, and the end of the main pressing rod 210 contacts the top of another shearing sample 400. The hemispherical or spherical structure provides point support for the shearing sample 400, which can reduce the pressing error of the shearing sample 400. Furthermore, the secondary pressing rod 220 is distributed on both sides of the main pressing rod 210, and the secondary pressing rod 220 is pressed with the non-glued end of the shearing sample 400. The free end of the secondary pressing rod 220 is a semi-cylindrical structure, and the cylindrical surface of the semi-cylinder contacts the shearing sample 400.

[0031] In order to ensure that the shear sample 400 can be accurately positioned on the base 100, as Figure 1 and Figure 2 As shown, the base 100 is provided with a guide post 140, which passes through the through hole 420 of the non-glued end of the shearing sample 400, and the guide post 140 is used to limit the non-glued end of the shearing sample 400. Furthermore, two side baffles 500 are provided on the edge of the upper surface of the base 100, and the two side baffles 500 are distributed on the base 100 on both sides of the groove 110. The side baffles 500 can provide side support for positioning the shearing sample 400, so that the side of the shearing sample 400 can be close to the side baffles 500. The side baffles 500 cooperate with the guide post 140 to make the shearing sample 400 more accurately positioned. In addition, each side baffle 500 is provided with a U-shaped groove 510 that penetrates the side baffle 500, and the side baffle 500 is connected to the base 100 through the U-shaped groove 510 and the bolt 600. By adjusting the position of the bolt 600 in the U-shaped groove 510 , the side baffle 500 can be moved along the position of the U-shaped groove 510 and accurately positioned to the designed position, so that the two side baffles 500 can be kept parallel at any position.

[0032] In this embodiment, the specific connection method between the pressing assembly 200 and the base 100 is as follows: Figure 1 and Figure 3 As shown, an axial hole penetrating the base 100 is provided on one side of the base 100, a rotating shaft 120 is arranged in the axial hole, the main pressing rod 210 and the auxiliary pressing rod 220 are connected to the base 100 through the rotating shaft 120, and a torsion device 130 is connected between the main pressing rod 210, the auxiliary pressing rod 220 and the base 100, and the torsion device 130 provides the main pressing rod 210 and the auxiliary pressing rod 220 with a torsion force for pressing and shearing the sample 400. The torsion device 130 specifically adopts a torsion spring, and when the main pressing rod 210 and the auxiliary pressing rod 220 rotate around the rotating shaft 120, the torsion spring provides torsion force, so as to automatically press the main pressing rod 210 and the auxiliary pressing rod 220 onto the supporting top rod 300 and the base 100, respectively.

[0033] When the glued ends of the two shearing pieces 400 are glued, the glued ends of the two shearing pieces 400 are arranged up and down, and the two shearing pieces 400 are arranged in parallel and staggered in the vertical space. In order to press the pressing assembly 200 and the shearing pieces 400 tightly, two cushion blocks 700 are also provided, one of which is provided between the upper surface of the base 100 and the bottom surface of the shearing piece 400, and the other cushion block 700 is provided between the bottom surface of the auxiliary pressing rod 220 and the top surface of the shearing piece 400.

[0034] The working process of this device is as follows:

[0035] S1. Positioning samples

[0036] After the side baffle 500 is positioned and parallel, the through hole 420 at one end of the shear sample 400 passes through the guide column 140, the side surface is close to the side baffle 500, one end of the bottom surface is placed on the plane of the base 100, and the other end of the bottom surface is placed on the support top rod 300.

[0037] S2. Gluing operation

[0038] The colloid 800 is applied to the upper surface of one end of the sheared sample 400 , and then a copper wire 410 of a specified thickness is inserted into the colloid 800 ; the other sheared sample 400 is positioned according to the method of step S1 .

[0039] S3, compaction

[0040] The main pressing rod 210 and the auxiliary pressing rod 220 are released respectively. Relying on the torsion force of the torsion spring, the semi-cylindrical surface of the auxiliary pressing rod 220 is tightly pressed against the upper surface of the non-bonded end of the shearing sample 400, and the hemispherical surface of the main pressing rod 210 is tightly pressed against the upper surface of the bonded end of the shearing sample 400.

[0041] S4. Glue overflow treatment

[0042] After the shearing sample 400 is compacted, the portion of the colloid 800 overflowing from the side of the shearing sample 400 is scraped off.

[0043] S5. Sample disassembly

[0044] After the colloid 800 is solidified, the main pressing rod 210 and the auxiliary pressing rod 220 are pulled up to remove the shear sample 400 from the guide column 140 .

[0045] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "up", "down", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The protection scope of the present invention is limited only by the claims. Thanks to the teachings of the present invention, those skilled in the art will easily recognize that alternative structures to the structures disclosed in the present invention can be used as feasible alternative embodiments, and the embodiments disclosed in the present invention can be combined to generate new embodiments, which also fall within the scope of the appended claims.

Claims

1. A constant pressure adhesive shearing sample preparation device, comprising a base (100) and a pressing assembly (200), wherein the pressing assembly (200) is movably connected to one side of the base (100), characterized in that: The base (100) is provided with a groove (110), and a supporting top rod (300) is provided in the groove (110), and the supporting top rod (300) is used to support the glued ends of the two shearing samples (400); the pressing assembly (200) cooperates with the supporting top rod (300) to press the glued ends of the two shearing samples (400), and the supporting top rod (300) and the pressing assembly (200) both form point contact with the glued ends of the two shearing samples (400).

2. A constant pressure adhesive shearing sample preparation device according to claim 1, characterized in that: The top of the support rod (300) is hemispherical or spherical, and the top of the support rod (300) contacts the bottom of one of the shearing samples (400); the pressing assembly (200) comprises a main pressing rod (210) and a secondary pressing rod (220), the end of the main pressing rod (210) is hemispherical or spherical, and the end of the main pressing rod (210) contacts the top of the other shearing sample (400).

3. A constant pressure adhesive shearing sample preparation device according to claim 2, characterized in that: The secondary pressing rods (220) are distributed on both sides of the main pressing rod (210), and the secondary pressing rods (220) are pressed with the non-adhesive ends of the shearing specimen (400).

4. A constant pressure adhesive shearing sample preparation device according to claim 3, characterized in that: The base (100) is provided with a guide column (140), the guide column (140) passes through a through hole (420) at the non-gluing end of the shearing sample (400), and the guide column (140) is used to limit the non-gluing end of the shearing sample (400).

5. The constant pressure adhesive shearing sample preparation device according to claim 3, characterized in that: The free end of the secondary pressing rod (220) is a semi-cylindrical structure, and the cylindrical surface of the semi-cylinder is in contact with the shearing sample (400).

6. A constant pressure adhesive shearing sample preparation device according to claim 2, characterized in that: An axial hole penetrating the base (100) is provided on one side of the base (100), a rotating shaft (120) is arranged in the axial hole, the main pressing rod (210) and the auxiliary pressing rod (220) are connected to the base (100) via the rotating shaft (120), a torsion device (130) is connected between the main pressing rod (210), the auxiliary pressing rod (220) and the base (100), and the torsion device (130) provides the main pressing rod (210) and the auxiliary pressing rod (220) with a torsion force for pressing the shear specimen (400).

7. A constant pressure adhesive shearing sample preparation device according to claim 3, characterized in that: It also includes a plurality of cushion blocks (700), one of which is arranged between the upper surface of the base (100) and the bottom surface of the shearing sample (400), and one of which is arranged between the bottom surface of the secondary pressing rod (220) and the top surface of the shearing sample (400).

8. The constant pressure adhesive shearing sample preparation device according to claim 1, characterized in that: A colloid (800) and a copper wire (410) are arranged between the glued ends of the two shearing specimens (400), and the copper wire (410) is used to control the pressing thickness of the colloid (800).

9. The constant pressure adhesive shearing sample preparation device according to claim 1, characterized in that: A plurality of side baffles (500) are arranged on the edge of the upper surface of the base (100), and the side baffles (500) are used to position the shearing sample (400).

10. A constant pressure adhesive shearing sample preparation device according to claim 9, characterized in that: A plurality of the side baffles (500) are distributed on the base (100) on both sides of the groove (110), each of the side baffles (500) is provided with a U-shaped groove (510) penetrating the side baffle (500), and the side baffles (500) are connected to the base (100) via the U-shaped groove (510) and bolts (600).

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