CN116202950A

CN116202950A - Testing device and testing method for film adhesion force

Info

Publication number: CN116202950A
Application number: CN202111440777.6A
Authority: CN
Inventors: 曹杰; 宋袁曾; 刘院君; 赵云龙; 俞威; 贲娜; 褚玉平
Original assignee: Shanghai Aircraft Manufacturing Co Ltd
Current assignee: Shanghai Aircraft Manufacturing Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2023-06-02

Abstract

The invention relates to the field of film adhesion testing, and discloses a film adhesion testing device and a film adhesion testing method. The testing device for the film adhesion force comprises a clamp and a tension meter, wherein the clamp comprises a clamp main body and a clamping block, and the clamping block is slidably arranged in a chute of the clamp main body and clamps the stripping end of the film with the inner wall of the chute. The tension meter is connected with the clamp main body. The method for testing the film adhesion comprises the following steps of S1: selecting a designated area on the substrate, separating the designated area from the film layers in other areas, and recording the width of the film layer in the designated area. S2: one end of the film layer is separated from the substrate in a designated area. S3: the peeling end of the film layer is clamped by a clamp. S4: the film was peeled from the substrate at a set rate by pulling the clamp with a tensiometer. S5: and recording a tension value of a tension meter in the film peeling process, and calculating the tension value divided by the width of the film to obtain the adhesive force of the film. The experimental cost is reduced, and the accuracy of the experimental result is improved.

Description

Testing device and testing method for film adhesion force

Technical Field

The invention belongs to the field of film adhesion testing, and particularly relates to a film adhesion testing device and a film adhesion testing method.

Background

In the aircraft manufacturing process, the organic film layer can play roles in connection, protection and the like in various parts of the aircraft, and has the advantages of low cost, high fatigue resistance, light weight, wide application material range and the like, so that the organic film layer becomes a surface processing technology of the aircraft, and the advantages and disadvantages of the adhesive force of the organic film layer have direct influence on the quality of the parts.

At present, the adhesion of an organic film layer on the surface of an aircraft part is mainly tested by manufacturing a large number of test pieces glued by the film layer and measuring the test pieces through a climbing drum type stripping experiment or an cantilever beam type stripping experiment. The two experiments described above require the use of large laboratory equipment such as a tensile machine and are required to be performed in a laboratory environment. Because the preparation work and the experimental process before the experiment are complex, the influence of the experimental environment is easy to happen, and the accuracy of the adhesive force measurement result of the film layer on the test piece is low.

In addition, because the aircraft adopts the part category of the organic film layer construction technology, a large number of relevant test pieces need to be prepared, and the labor cost and the material cost are further increased.

Disclosure of Invention

The invention aims to provide a testing device for film adhesion force, which is used for simplifying experimental preparation and experimental process, reducing experimental cost and improving accuracy of experimental results.

The technical scheme adopted by the invention is as follows:

the device is used for measuring the adhesive force of the film layer in a designated area on the substrate; the testing device for the film adhesion force comprises:

the clamp comprises a clamp body and a clamp block, wherein the bottom surface of the clamp body is concavely provided with a chute, and the clamp block is slidably arranged in the chute and can clamp the stripping end of the film together with the inner wall of the chute; and

a tension meter configured to be connectable to the clamp body and to pull the clamp body to peel the film layer from a designated area of the substrate.

Further, the testing device for the film adhesion force further comprises:

the adjusting assembly comprises an adjusting rod, an adjusting hole communicated with the sliding groove is formed in the clamp main body, the adjusting rod penetrates through the adjusting hole and is connected with the clamping block, and the adjusting rod can move along the adjusting hole to drive the clamping block to slide in the sliding groove.

Further, the adjustment assembly further comprises:

the deflector rod is arranged at one end of the adjusting rod far away from the clamping block and is connected with the adjusting rod to form a T-shaped structure.

Further, the clamp further includes:

the connecting rod, the one end of connecting rod with the top surface of anchor clamps main part links to each other, and the other end has seted up and has run through its radial locating hole, the tensiometer has the couple, the couple can wear to locate in the locating hole.

Further, a threaded hole is formed in the top surface of the clamp body, and one end of the connecting rod is in threaded connection with the threaded hole.

The invention also aims to provide a method for testing the film adhesive force, which is used for simplifying experimental preparation and experimental process, reducing experimental cost and improving accuracy of experimental results.

The technical scheme adopted by the invention is as follows:

the method for testing the film adhesive force is applied to the device for testing the film adhesive force, and comprises the following steps:

s1: selecting a designated area on the substrate, separating the designated area from the film layers in other areas, and recording the width of the film layer in the designated area;

s2: separating one end of the film layer from the substrate in a designated area to form a peeled end of the film layer;

s3: clamping the stripping end of the film layer through the clamp;

s4: connecting the tension meter with the clamp, and pulling the clamp through the tension meter to peel the film layer from the substrate at a set rate;

s5: and recording a tension value of the tension meter in the film peeling process, and calculating the tension value divided by the width of the film to obtain the adhesive force of the film.

Further, in step S1, the film layer is cut along the edge of the designated area by hand.

Further, in step S4, an angle between the pulling direction of the tension meter and the substrate is 90 °.

Further, in step S4, the film layer is peeled from the base material at a set rate of 50 mm/min.

Further, step S5 is followed by step S6:

repairing the appointed area on the substrate, and re-paving the film layer in the appointed area.

The beneficial effects of the invention are as follows:

according to the testing device for the film adhesive force, disclosed by the invention, the clamp is pulled by the tension meter, so that the film is peeled off from the substrate, and the structure of the testing device for the film adhesive force is simplified. Because the testing device of rete adhesive force can directly carry out the rete experiment of peeling off on the substrate, need not to carry out the experiment under laboratory environment, avoided the experimental process to receive the influence of laboratory environment, improved the accuracy of experimental result. Meanwhile, the process of preparing a large number of test pieces is reduced, the experimental time and the experimental cost are saved, the experimental process is simplified, and the experimental efficiency is improved.

The testing method of the film adhesive force provided by the invention is applied to the testing device of the film adhesive force, and experiments are not needed to be carried out in laboratory environments, so that the influence of the laboratory environments can be avoided, and the accuracy of experimental results is improved. Meanwhile, the process of preparing a large number of test pieces is reduced, the experimental time and the experimental cost are saved, the experimental process is simplified, and the experimental efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of a device for testing adhesion of a film layer when the film layer is peeled off according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a test device for film adhesion provided by an embodiment of the present invention;

fig. 3 is a main flowchart of a method for testing adhesion of a film according to an embodiment of the present invention.

The parts in the figures are named and numbered as follows:

10. a substrate; 20. a film layer;

1. a clamp; 11. a clamp body; 111. a chute; 112. a threaded hole; 12. clamping blocks; 13. an adjustment assembly; 131. an adjusting rod; 132. a deflector rod; 14. a connecting rod; 2. a tension meter; 21. a hook.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the invention more clear, the technical scheme of the invention is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present invention are shown.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.

At present, the test of the adhesive force of the organic film layer on the surface of the aircraft part is mainly to manufacture a large number of test pieces with the film layer adhered, and the test is measured through a climbing drum type stripping test or an cantilever beam type stripping test. Both methods need to use large-scale experimental equipment such as a tension machine and the like, and need to be carried out in a laboratory environment, so that an experimental preparation process and an experimental process are complex, the influence of the experimental environment is easy to cause lower accuracy of a measurement result. Meanwhile, a large number of test pieces need to be prepared, and the experimental cost is further increased.

In order to solve the above problems, as shown in fig. 1, the present embodiment discloses a device for testing adhesion of a film layer, which is mainly used for measuring adhesion of a film layer 20 on a substrate 10 of an aircraft. Of course, the film adhesion testing device may also be used for measuring the adhesion of the film 20 of other devices or products such as ships, and is not particularly limited herein.

Since the number of types of parts to be mounted on the aircraft using the film layer 20 is large, repeated experiments in a plurality of areas are required. Therefore, a designated area can be selected from the areas where the adhesion of the film 20 is to be measured, and the designated area can be separated from the film 20 in other surrounding areas. And a part of the film layer 20 is peeled from the substrate 10 along one end of the length direction of the designated area to form a peeled end of the film layer so that the subsequent experiment can be smoothly performed.

As shown in fig. 1, the device for testing the adhesion force of the film layer comprises a clamp 1 and a tension meter 2, wherein the clamp 1 comprises a clamp main body 11 and a clamp block 12, the bottom surface of the clamp main body 11 is concavely formed into a chute 111, and the clamp block 12 is slidably arranged in the chute 111 and can clamp the peeling end of the film layer 20 together with the inner wall of the chute 111. The tension meter 2 can be connected to the clamp body 11 and pull the clamp body 11 to peel the film layer 20 from a designated area of the substrate 10.

During the peeling of the film 20, the tension value of the tension meter 2 was recorded and divided by the width value of the film 20 in the designated area to obtain the adhesion of the film 20.

In this embodiment, the tensiometer 2 pulls the clamp 1 such that the film 20 peels off the substrate 10. By manually pulling the tension meter 2, large-scale equipment such as a tension machine is not required, so that the energy consumption is saved, and the structure of the testing device for the film adhesive force is simplified. Because the testing device of the film adhesive force directly carries out the peeling experiment of the film 20 on the base material 10 of each part of the airplane, the experiment is not required to be carried out in a laboratory environment, the influence of the laboratory environment can be avoided, and the accuracy of the experimental result is improved. Meanwhile, the process and the cost for preparing a large number of test pieces are reduced, the experimental process is simplified, and the experimental efficiency is improved.

Specifically, the clamp body 11 is a U-shaped block, and the chute 111 is a U-shaped slot in the middle of the clamp body 11, so that the chute 111 has an opening at the bottom surface of the clamp body 11, so that the peeling end of the film 20 can extend into the chute 111. Meanwhile, the sliding grooves 111 penetrate through two ends of the clamp body 11 in the width direction, so that an operator can conveniently observe whether the clamp block 12 clamps the peeling end of the film layer 20.

In addition, the side surface of the clamping block 12 for clamping the film layer 20 is provided with tooth-shaped lines, so that the friction force between the clamping block 12 and the film layer 20 is improved, the clamping force of the clamp 1 is improved, and the reliability of the clamp 1 is improved.

As shown in fig. 1 and 2, the testing device for film adhesion force further includes an adjusting assembly 13, where the adjusting assembly 13 includes an adjusting rod 131 and a deflector 132, the clamp body 11 is provided with an adjusting hole that is communicated with the chute 111, the adjusting rod 131 passes through the adjusting hole and is connected with the clamping block 12, and the adjusting rod 131 can move along the adjusting hole to drive the clamping block 12 to slide in the chute 111.

The adjusting rod 131 in this embodiment is a threaded rod, the adjusting hole is a threaded hole 112 adapted to the adjusting rod 131, and the adjusting rod 131 is in threaded connection with the adjusting hole. The displacement of the clamping block 12 in the chute 111 can be quickly regulated by rotating the regulating rod 131, and the stripping end of the film 20 can be firmly clamped by the clamping block 12 and the clamp main body 11 in a threaded connection mode, so that the film 20 is prevented from being separated from the chute 111, and the clamping force of the clamp 1 is improved.

Specifically, the shift lever 132 is disposed at one end of the adjusting lever 131 far away from the clamping block 12, and is connected with the adjusting lever 131 to form a T-shaped structure, so that the adjusting lever 131 can be conveniently and manually rotated forward or backward by the shift lever 132.

It should be noted that, in order to avoid the clamping block 12 moving in the sliding groove 111 and rotating at the same time, the clamping block 12 interferes with the inner wall of the sliding groove 111, as shown in fig. 2, the end of the adjusting rod 131 extending into the clamping block 12 is a flange head, and a T-shaped groove adapted to the flange head is correspondingly formed on the clamping block 12. The flange head of the adjustment lever 131 is rotatably positioned in the T-shaped groove of the clamp block 12, so that the adjustment lever 131 can rotate relative to the clamp block 12 and push the clamp block 12 to slide in the slide groove 111.

As shown in fig. 1 and 2, the clamp 1 further includes a connecting rod 14, one end of the connecting rod 14 is connected to the top surface of the clamp body 11, and the other end is provided with a positioning hole penetrating the radial direction of the connecting rod, and the tension meter 2 is provided with a hook 21, where the hook 21 can be penetrated in the positioning hole. The connecting rod 14 is matched with the hook 21, so that the tension meter 2 can be reliably connected with the clamp 1. The hooking or unhooking operation of the hook 21 and the positioning hole of the connecting rod 14 is simple and feasible, and the assembly time of the hook 21 and the connecting rod 14 is shortened.

Specifically, the top surface of the clamp body 11 is provided with a threaded hole 112, and one end of the connecting rod 14 is screwed with the threaded hole 112. The connecting rod 14 and the clamp main body 11 are high in connection strength and good in stability through a screw thread mode. While facilitating the disassembly and replacement of the connecting rod 14.

In order to facilitate understanding, as shown in fig. 3, the embodiment also discloses a method for testing the adhesion of the film layer, which is applied to the device for testing the adhesion of the film layer, so as to directly measure the adhesion of the film layer 20 in a designated area of the aircraft.

Specifically, the method for testing the adhesive force of the film layer comprises the following steps:

s1: selecting a designated area on the substrate 10, separating the designated area from the film layers 20 in other areas, and recording the width of the film layers 20 in the designated area;

s2: separating one end of the film layer 20 from the substrate 10 in a designated area to form a peeled end of the film layer 20;

s3: clamping the peeling end of the film layer 20 by a clamp 1;

s4: connecting the tension meter 2 with the clamp 1, and pulling the clamp 1 through the tension meter 2 to peel the film 20 from the substrate 10 at a set rate;

s5: the tension value of the tension meter 2 during peeling of the film 20 is recorded, and the tension value is calculated divided by the width of the film 20 to obtain the adhesion of the film 20.

The film adhesion test method is roughly classified into cutting, initial peeling and peeling processes of the film 20. The film layer 20 adhesive force is directly measured in the appointed area of the airplane through the film layer adhesive force testing device, so that the use scene is enlarged, and the film layer adhesive force testing device is not limited in a laboratory. Compared with a test piece used in a laboratory, the test method for the film adhesion has the advantages that the experimental environment is more real, the lamination is actual, and the accuracy of an experimental result is improved.

In step S1, the film layer 20 is cut along the edge of the designated area by hand. The manual cutting of the film 20 saves energy and increases the flexibility of the cutting process.

During the cutting of the film 20, the selected test area on the aircraft substrate 10 is designated area, which has a width of about 25.4mm + -6.3 mm and a length of at least 90mm, to ensure a sufficiently long peel time. When the film 20 is in a dry state, the film 20 is cut along the edge of the designated area by a plastic scraper or other plastic tools until the film is cut to the base material 10 (the metal surface paint layer of the airplane), and the metal surface of the airplane can be prevented from being damaged by using the plastic tools, so that the cutting quality is ensured. It should be noted that when the dicing is completed, it is necessary to further measure the width value of the specified area and ensure that the error range of the width is within ±0.5mm, thereby improving the accuracy of calculating the adhesion force.

In the initial peeling process of the film layer 20, the film layer 20 with the length of 5 mm-30 mm is slowly peeled by using a cutting tool such as a plastic scraper or a plastic shovel to form the peeling end of the film layer 20. The peeling end of the film 20 is then extended into the slide groove 111 of the clamp body 11, and the clamp block 12 is clamped with the clamp body 11 by rotating the adjusting lever 131.

Step S4 is a film layer 20 stripping process, after the hooks 21 of the tension meter 2 are penetrated into the positioning holes on the connecting rod 14, the tension meter 2 is pulled manually to slowly strip the film layer 20. As shown in fig. 1, the angle α between the pulling direction of the tension meter 2 and the base material 10 in this embodiment is 90 °. When the space of the designated area is limited, the size of the included angle alpha can be adjusted. For example, the angle α is adjusted to 30 °, 45 ° or 60 °, etc., to ensure that the tension meter 2 does not collide with other structures or components of the aircraft during the pulling of the tension meter 2, so as to affect the smooth peeling of the film layer 20.

It should be noted that in step S4, the film layer 20 is peeled from the substrate 10 at a set rate of 50mm/min, so as to ensure the stability of the peeling process of the film layer 20, thereby maintaining the stability and consistency of the tensile force, being beneficial to improving the accuracy of the adhesive force of the film layer 20, and avoiding the overlarge variation range of the tensile force due to factors such as negligence and slow negligence in the pulling process. After the tension is stable, the value of the tension is recorded and divided by the width of the film 20 to obtain the adhesive force of the film 20.

Because the method for testing the film adhesion force directly carries out a test experiment on the base material 10 of the aircraft, the designated area needs to be repaired after the experiment is finished so as to ensure the quality and the safety of the aircraft. Therefore, step S6 is further included after step S5: repairing a designated area on the substrate 10 and re-laying the film layer 20 in the designated area.

Specifically, after the adhesion measurement experiment of the film 20 is completed on the surface of the airplane, the de-adhered film 20 and the primer layer on the surface of the substrate 10 in the designated area are removed by using a plastic doctor blade, and polished and cleaned to activate the surface of the substrate 10 to which the paint layer and the film 20 need to be applied. Finally, the film 20 is laid after painting the specified area of the substrate 10 according to the original manufacturing requirements of the aircraft, so as to restore the specified area and maintain the integrity and consistency of the specified area and the surrounding area.

The above embodiments merely illustrate the basic principle and features of the present invention, and the present invention is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The device for testing the film adhesion is characterized by being used for measuring the adhesion of the film (20) in a designated area on the substrate (10); the testing device for the film adhesion force comprises:

the clamp (1) comprises a clamp main body (11) and a clamping block (12), wherein the bottom surface of the clamp main body (11) is concavely provided with a chute (111), and the clamping block (12) is slidably arranged in the chute (111) and can clamp the stripping end of the film layer (20) together with the inner wall of the chute (111); and

-a tension meter (2) configured to be able to be connected to the clamp body (11) and to pull the clamp body (11) to peel the film layer (20) from a designated area of the substrate (10).

2. The device for testing adhesion of a film according to claim 1, further comprising:

the adjusting assembly (13) comprises an adjusting rod (131), an adjusting hole communicated with the sliding groove (111) is formed in the clamp main body (11), the adjusting rod (131) penetrates through the adjusting hole and is connected with the clamping block (12), and the adjusting rod (131) can move along the adjusting hole to drive the clamping block (12) to slide in the sliding groove (111).

3. The device for testing the adhesion of a film according to claim 2, characterized in that said adjusting assembly (13) further comprises:

the deflector rod (132) is arranged at one end of the adjusting rod (131) far away from the clamping block (12) and is connected with the adjusting rod (131) to form a T-shaped structure.

4. The device for testing the adhesion of a film according to claim 1, characterized in that said clamp (1) further comprises:

connecting rod (14), the one end of connecting rod (14) with the top surface of anchor clamps main part (11) links to each other, and the locating hole that runs through its radial is seted up to the other end, pull gauge (2) have couple (21), couple (21) can wear to locate in the locating hole.

5. The device for testing the adhesive force of the film according to claim 4, wherein a threaded hole (112) is formed in the top surface of the clamp body (11), and one end of the connecting rod (14) is in threaded connection with the threaded hole (112).

6. A method for testing film adhesion, applied to the device for testing film adhesion according to any one of claims 1 to 5, characterized in that the method for testing film adhesion comprises the following steps:

s1: selecting a designated area on the substrate (10), separating the designated area from the film layer (20) in other areas, and recording the width of the film layer (20) in the designated area;

s2: separating one end of the film layer (20) from the substrate (10) in a designated area to form a peeled end of the film layer (20);

s3: clamping the peeling end of the film layer (20) by the clamp (1);

s4: connecting the tension meter (2) with the clamp (1) and pulling the clamp (1) through the tension meter (2) to peel the film (20) from the substrate (10) at a set rate;

s5: and recording the tension value of the tension meter (2) in the peeling process of the film layer (20), and calculating the tension value divided by the width of the film layer (20) to obtain the adhesive force of the film layer (20).

7. The method according to claim 6, characterized in that in step S1, the film (20) is cut manually along the edges of the designated area.

8. The method according to claim 6, wherein in step S4, the angle between the direction of the pulling force gauge (2) and the substrate (10) is 90 °.

9. The method according to claim 6, wherein in step S4, the film layer (20) is peeled from the substrate (10) at a set rate of 50 mm/min.

10. The method for testing adhesion of a film according to claim 6, further comprising step S6 after step S5:

repairing a designated area on the substrate (10) and re-laying the film layer (20) in the designated area.