Auxiliary device for testing adhesion force by pull-off method

Abstract

The utility model relates to an auxiliary device for testing adhesion force by a pull-off method, which comprises a lower positioning base positioned at the lowest end of the auxiliary device for testing, supporting columns fixed at two ends of the lower positioning base, a lower adhesion force testing column fixed in the middle of the lower positioning base, an upper positioning cross beam fixed above the supporting columns, and a lower positioning cross beam fixed above the upper positioning cross beam, one side of the upper positioning cross beam is connected with a limiter, the upper positioning cross beam is matched with the limiter to fix an upper adhesive force test column, and the upper adhesive force test column and the corresponding lower adhesive force test column are concentrically and coaxially arranged in the vertical direction. The test auxiliary device disclosed by the utility model is of a left-right half-wrapped structure, so that the coaxial arrangement of the double test columns is ensured, the problems of limited operation space and deformation caused by the fact that residual glue is adhered to the device in the prior art can be effectively solved, and high sample preparation efficiency, reliability, convenience and easiness in maintenance of the device are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of adhesion testing, and particularly relates to an auxiliary device for pull-off adhesion testing. Background Art

[0002] The pull-off adhesion test is a common test method for measuring the strength of paint films. In the national standard GB / T5210-2006 / ISO4624:200 "Pull-off adhesion test for paints and varnishes", it is required that the lower adhesion test column located below the test panel and the upper adhesion test column above the test panel should be arranged coaxially.

[0003] However, usually during the preparation of adhesion samples, it is impossible for experimenters to completely align or judge whether the lower and upper adhesion test columns are coaxially arranged only by the naked eye. Therefore, experimental data is often inaccurate due to human factors. In recent years, there have also been many centering devices for adhesion testing. For example: First, the application number is CN201920858035.7, and the patent name is: "Centering device for pull-off adhesion test of paints and varnishes", which discloses a centering device. The device mainly has upper and lower centering frames. During use, first fix the two test columns on the corresponding centering frames, and then paste the test columns on the test panel by sliding up and down. Although this centering device can solve the problem of centering adhesion samples, only one adhesion test sample can be prepared each time, and the sample preparation time is too long and the efficiency is low. Second, the application number is CN201921013741.8, and the patent name is: "A centering device for pull-off adhesion test of paints and varnishes", which discloses a centering device, including: upper panel, lower panel, fixing bolts, test columns and centering pins. During use, the lower test column needs to pass through the positioning hole of the lower panel, then paste the test panel on the lower test column, and then pass the upper test column through the coaxially arranged positioning hole of the upper panel and paste it on the test panel. This device solves the problem of difficult centering and has high efficiency at the same time. However, due to the limitation of its upper and lower fully enclosed structure, the operation of experimenters is extremely restricted during the implementation process. It is easy to smear the adhesive into the positioning round holes of the centering device or because too much adhesive flows into the centering device, resulting in the sample being unable to be taken out smoothly. Over time, it will also cause the centering device to deform due to force, resulting in inaccurate centering.

[0004] In view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0005] The utility model provides an auxiliary device for pull-off adhesion testing. The device has a left and right semi-enclosed structure. While ensuring the coaxial arrangement of the double test columns, it can effectively solve the problems of limited operation space and deformation caused by residual adhesive adhering to the device in the prior art, and ensure high efficiency in preparing samples, and the device is reliable, convenient and easy to maintain.

[0006] An auxiliary device for pull-off adhesion testing of the present utility model includes a lower positioning base, which is located at the lowermost end of the testing auxiliary device. Support columns are fixed at both ends of the lower positioning base, and the middle is used to fix the lower adhesion test column. An upper positioning crossbeam is fixed above the support columns. A limiter is connected to one side of the upper positioning crossbeam, and the upper positioning crossbeam and the limiter cooperate to fix the upper adhesion test column. The upper adhesion test column and the corresponding lower adhesion test column are placed concentrically and coaxially in the vertical direction.

[0007] Further, the support columns include a first support column and a second support column, which are respectively fixed at the left and right ends of the lower positioning base.

[0008] Further, on the side of the upper positioning crossbeam where the limiter is provided, a plurality of semicircular positioning openings are provided, and the upper adhesion test column is placed in the positioning openings.

[0009] Further, a plurality of third grooves are provided on the lower positioning base, and the plurality of positioning openings and the plurality of third grooves are arranged in one-to-one correspondence in the vertical direction, and the corresponding positioning openings and third grooves are concentric and coaxial in the vertical direction.

[0010] Further, the third groove includes a first channel and a second channel that are concentric and coaxial in the vertical direction. The second channel is semicircular and is provided on the upper step of the three-layer step. The first channel is circular and is provided on the middle step of the three-layer step. A fifth through hole that is concentric and coaxial with the first channel in the vertical direction is provided on the lower step, and the lower adhesion test column is placed in the third groove.

[0011] Further, third threaded holes are provided at both ends of the upper positioning crossbeam. Correspondingly, sixth through holes are provided at both ends of the limiter, and fixing screws pass through the sixth through holes and are threadedly connected to the third threaded holes to fixedly connect the upper positioning crossbeam and the limiter.

[0012] Further, a first through hole is provided at one end of the lower positioning base, a second through hole is provided on the corresponding connected support column in sequence, and a first threaded hole is provided at one end of the upper positioning crossbeam. A first screw passes through the first through hole, the second through hole, and the first threaded hole in sequence and is threadedly connected.

[0013] Further, a third through hole is provided at the other end of the lower positioning base, a fourth through hole is provided on the corresponding connected support column in sequence, and a second threaded hole is provided at the other end of the upper positioning crossbeam. A second screw passes through the third through hole, the fourth through hole, and the second threaded hole in sequence and is threadedly connected.

[0014] The present utility model has the following advantages compared with the prior art:

[0015] 1. When the pull-off adhesion test auxiliary device provided by the present utility model conducts an adhesion test, the lower adhesion test column can be first fixedly placed in the third groove, and the upper adhesion test column can be located in the positioning opening. Then, a limiter and the upper positioning cross beam are used to cooperate to fix the upper adhesion test column. Since the third groove and the positioning opening are concentric and coaxial, the coaxial arrangement of the upper adhesion test column and the lower adhesion test column can be ensured;

[0016] 2. Since the limiter, the upper positioning cross beam and the third groove on the lower positioning base of the pull-off adhesion test auxiliary device provided by the present utility model are in a left-right semi-surrounding structure, the operation space limitation of the experimenter is liberated. At the same time, the left-right semi-surrounding structure also solves the problem of adhesion to the device caused by excessive adhesive. Even if the upper adhesion test column adheres to the device, it can be easily taken out due to the small adhesion area, thus avoiding the problem of device deformation caused by violent extraction;

[0017] 3. The pull-off adhesion test auxiliary device provided by the present utility model can be provided with a plurality of third grooves and a plurality of positioning openings. Therefore, the central positioning of a plurality of adhesion test columns can be carried out in sequence, greatly improving the efficiency;

[0018] 4. Each component in the pull-off adhesion test auxiliary device provided by the present utility model can be separately disassembled, replaced and repaired, making the maintenance of the present utility model simpler and the application range wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings here are incorporated into the specification and form a part of this specification, and are used together with the specification to explain the principle of the present utility model.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the accompanying drawings required for use in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is the front view structural schematic diagram of the pull-off adhesion test auxiliary device of the present utility model;

[0022] Figure 2 It is the top view structural schematic diagram of the pull-off adhesion test auxiliary device of the present utility model;

[0023] Figure 3 It is the left view structural schematic diagram of the pull-off adhesion test auxiliary device of the present utility model;

[0024] Figure 4 It is the right view structural schematic diagram of the pull-off adhesion test auxiliary device of the present utility model;

[0025] Wherein: 1 - lower positioning base; 2 - first support column; 3 - second support column; 4 - upper positioning cross beam; 5 - fixing screw; 6 - limiter; 7 - third groove; 8 - positioning opening. Specific embodiments

[0026] The embodiments of the present utility model will be described in detail below in conjunction with the embodiments. However, those skilled in the art will understand that the following embodiments are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention.

[0027] An auxiliary device for pull-off adhesion testing provided by the present utility model, referring to the attached Figures 1-4 , the device includes a lower positioning base 1, a first support column 2, a second support column 3, an upper positioning cross beam 4, a fixing screw 5 and a limiter 6; the lower positioning base 1 is used to define the position of the lower adhesion test column; one end of the first support column 2 is fixed to one end of the lower positioning base 1, which can be the left end or the right end, shown as the left end in the figure, and the other end of the first support column 2 is connected to the lower end of the upper positioning cross beam 4. One end of the second support column 3 is fixed to the other end of the lower positioning base 1, specifically, as shown in the figure, it is arranged at the right end, and the other end of the second support column 3 is connected to the other end of the upper positioning cross beam 4. The limiter 6 is connected to the side surface of the upper positioning cross beam 4 through the fixing screw 5, and the limiter 6 and the upper positioning cross beam 4 cooperate to limit the position of the upper adhesion test column.

[0028] According to an embodiment of the present utility model, the device further includes a first screw; a first through hole is opened at one end of the lower positioning base 1, a second through hole is opened in the first support column 2, and a first threaded hole is provided at one end of the upper positioning cross beam 4. The first screw sequentially passes through the first through hole, the second through hole and the first threaded hole. The diameter of the first screw is smaller than the diameter of the first threaded hole, and the diameter difference between the first screw and the first threaded hole is relatively small. For example, the diameter difference between the first screw and the first threaded hole can be 1 mm, 2 mm, etc. Further, the diameter of the first screw is also smaller than the diameter of the first through hole, and the diameter difference between the first screw and the first through hole is relatively small. For example, the diameter difference between the first screw and the first through hole can be 1 mm, 2 mm, etc. The diameter of the first screw is also smaller than the diameter of the second through hole, and the diameter difference between the first screw and the second through hole is relatively small. For example, the diameter difference between the first screw and the second through hole can be 1 mm, 2 mm, etc. An external thread is provided on the first screw, and an internal thread matching the external thread of the first screw is provided on the first threaded hole. In this way, after the first screw sequentially passes through the first through hole, the second through hole and the first threaded hole, it can be threadedly connected to the first threaded hole.

[0029] According to an embodiment of the present utility model, the device further includes a second screw; the other end of the lower positioning base 1 is provided with a third through hole, the second support column 3 is provided with a fourth through hole, and the other end of the upper positioning cross beam 4 is provided with a second threaded hole. The first screw sequentially passes through the third through hole, the fourth through hole and the second threaded hole. Further, the diameter of the second screw is smaller than the diameter of the second groove, and the difference between the diameter of the second screw and the diameter of the second groove is relatively small. For example, the difference between the diameter of the second screw and the diameter of the second groove can be 1 mm, 2 mm, etc. The diameter of the second screw is also smaller than the diameter of the third through hole, and the difference between the diameter of the second screw and the diameter of the third through hole is relatively small. For example, the difference between the diameter of the second screw and the diameter of the third through hole can be 1 mm, 2 mm, etc. The diameter of the second screw is also smaller than the diameter of the fourth through hole, and the difference between the diameter of the second screw and the diameter of the fourth through hole is relatively small. For example, the difference between the diameter of the second screw and the diameter of the fourth through hole can be 1 mm, 2 mm, etc. The second screw is provided with an external thread, and the second threaded hole is provided with an internal thread matching the external thread of the second screw. In this way, the second screw can sequentially pass through the second through hole and the second groove and then be threadedly connected to the second threaded hole.

[0030] According to an embodiment of the present utility model, the lower positioning base 1 has a three-layer stepped shape, and a plurality of third grooves 7 are provided on the lower positioning base 1. Any one of the plurality of third grooves 7 includes a first channel and a second channel. The first channel is located on the middle step of the three-layer stepped shape, and the second channel is located on the upper step of the three-layer stepped shape. The first channel and the second channel are concentric and coaxial. The first channel is circular, and the second channel is semicircular; a fifth through hole is provided at the bottom of the first channel, that is, the fifth through hole is located on the lower step of the three-layer stepped shape.

[0031] Among them, the number of the third grooves 7 can be set according to the number of adhesion test columns to be fixed. For example, in this embodiment, the number of the third grooves 7 is 6, and the 6 third grooves 7 are evenly arranged on the lower positioning base 1. The function of the first channel in the third groove 7 is to fix the lower adhesion test column to ensure the stable position of the lower adhesion test column and prevent problems such as movement and falling during the preparation of the adhesion sample, avoiding the situation of affecting the sample test effect. The function of the second channel in the third groove 7 is to assist in fixing the adhesion test column. The semicircular structure of the second channel can leave more operating space for the experimenter, and even if too much adhesive is coated on the adhesion test column, the adhesion test column will not be stuck to the second channel, avoiding the problem that the adhesion test column cannot be removed due to too much adhesive.

[0032] It is worth noting that since the fifth through hole is provided at the bottom of the first channel 71, even if the side wall of the adhesion test column is stuck to the device, a rod-shaped tool can be used to push out the adhesion test column through the fifth through hole.

[0033] According to an embodiment of the present utility model, a plurality of positioning openings 8 are provided on one side of the upper positioning cross beam 4. The plurality of positioning openings 8 correspond one-to-one with the plurality of third grooves 7, and the plurality of positioning openings 8 and the plurality of third grooves 7 are concentric and coaxial. Further, the length of the upper positioning cross beam 4 is the same as the length of the lower positioning base 1, and the shape of the upper positioning cross beam 4 can be set according to the use requirements. For example, in this embodiment, the upper positioning cross beam 4 is a long strip-shaped object. The function of the upper positioning cross beam 4 is to fix the position of the upper adhesion test column and liberate the operation space of the personnel.

[0034] According to an embodiment of the present utility model, two third threaded holes are respectively provided on the front side surfaces of both ends of the upper positioning cross beam 4. Correspondingly, two sixth through holes are provided at both ends of the limiter 6. The fixing screw 5 passes through the sixth through hole and the third threaded hole and is threadedly connected to fix the upper positioning cross beam and the limiter. The diameter of the fixing screw 5 is smaller than the diameter of the third threaded hole, and the difference between the diameter of the fixing screw 5 and the diameter of the third threaded hole is relatively small. For example, the difference between the diameter of the fixing screw 5 and the diameter of the third threaded hole can be 1 mm, 2 mm, etc. Further, the diameter of the fixing screw 5 is also smaller than the diameter of the sixth through hole, and the difference between the diameter of the fixing screw 5 and the diameter of the sixth through hole is relatively small. For example, the difference between the diameter of the fixing screw 5 and the diameter of the sixth through hole can be 1 mm, 2 mm, etc. The fixing screw 5 is provided with an external thread, and the third threaded hole is provided with an internal thread matching the external thread of the fixing screw 5. In this way, after the fixing screw 5 passes through the sixth through hole and the third threaded hole in sequence, it is threadedly connected to the third threaded hole. Through the fixing screw 5, the horizontal distance between the limiter 6 and the upper positioning cross beam 4 can be relatively fixed, so as to cooperate to limit the position of the upper adhesion test column, so that the upper adhesion test column does not undergo relative slip during the pull-off adhesion test. The length of the upper positioning cross beam 4 is the same as the length of the limiter 6, and the shape of the limiter 6 can be set according to the use requirements. For example, in this embodiment, the limiter 6 is a cuboid.

[0035] According to an embodiment of the present utility model, the usage method of the device of the present utility model is as follows: When preparing the adhesion sample, first place the device stably on the table. After applying an appropriate amount of adhesive on the lower adhesion test column, insert the lower adhesion test column into the third groove 7 provided in the lower positioning base 1. After completion, paste the lower surface of the test piece on the lower adhesion test column. After applying an appropriate amount of adhesive on the upper adhesion test column, close to the inner side of the positioning opening 8 provided on the upper positioning cross beam 4, press the adhesive application surface against the upper surface of the test piece. After sticking the upper adhesion test column, scrape out the excess residual adhesive. Finally, use the fixing screw 5 to pass through the sixth through hole and the third threaded hole in sequence, and threadedly connect tightly with the third threaded hole. After clamping the upper adhesion test column, place it in a set temperature and humidity environment until the adhesive is completely cured to complete the preparation of the adhesion sample.

[0036] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

Claims

1. An auxiliary device for pull-off adhesion testing, characterized in that It includes a lower positioning base (1) which is located at the lowermost end of the test auxiliary device. Support columns are fixed at both ends of the lower positioning base (1), and the middle is used to fix the lower adhesion test column. An upper positioning cross beam (4) is fixed above the support columns. A stopper (6) is connected to one side of the upper positioning cross beam (4), and the upper positioning cross beam (4) cooperates with the stopper (6) to fix the upper adhesion test column. The upper adhesion test column and the corresponding lower adhesion test column are placed concentrically and coaxially in the vertical direction.

2. The pull-off adhesion test auxiliary device according to claim 1, wherein, The support columns include a first support column (2) and a second support column (3), which are respectively fixed at the left and right ends of the lower positioning base (1).

3. The pull-off adhesion test assisting device according to claim 1, wherein On the side of the upper positioning cross beam (4) where the stopper (6) is provided, a plurality of semicircular positioning openings (8) are formed. The upper adhesion test column is placed in the positioning openings (8).

4. The pull-off adhesion test assisting device according to claim 3, wherein, A plurality of third grooves (7) are provided on the lower positioning base (1). The plurality of positioning openings (8) and the plurality of third grooves (7) are arranged in one-to-one correspondence in the vertical direction, and the corresponding positioning openings (8) and third grooves (7) are concentric and coaxial in the vertical direction.

5. The pull-off adhesion test assisting device according to claim 4, wherein, The third groove (7) includes a first channel and a second channel that are concentric and coaxial in the vertical direction. The second channel is semicircular and is formed on the upper step of the three-layer step. The first channel is circular and is formed on the middle step of the three-layer step. A fifth through hole that is concentric and coaxial with the first channel in the vertical direction is formed on the lower step. The lower adhesion test column is placed in the third groove (7).

6. The pull-off adhesion test assisting device according to claim 1, wherein, Third threaded holes are formed at both ends of the upper positioning cross beam (4). Correspondingly, sixth through holes are formed at both ends of the stopper (6). A fixing screw (5) passes through the sixth through hole and the third threaded hole and is threadedly connected to fix the upper positioning cross beam (4) and the stopper (6).

7. The pull-off adhesion test assisting device according to claim 1, wherein A first through hole is formed at one end of the lower positioning base (1). A second through hole is successively formed on the corresponding connected support column, and a first threaded hole is formed at one end of the upper positioning cross beam (4). A first screw passes through the first through hole, the second through hole, and the first threaded hole in sequence and is threadedly connected.

8. The pull-off adhesion test assisting device according to claim 1, characterized in that, A third through hole is formed at the other end of the lower positioning base (1). A fourth through hole is successively formed on the corresponding connected support column, and a second threaded hole is formed at the other end of the upper positioning cross beam (4). A second screw passes through the third through hole, the fourth through hole, and the second threaded hole in sequence and is threadedly connected.

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