Method and device for evaluating the sealing performance of fillet joints

Abstract

The present invention provides a method and device for evaluating the sealing performance of corner joints. The method is aimed at an L-shaped corner joint structure, and the corner joint gap of the corner joint structure is sealed by gluing. The method includes: obtaining a sample of the corner joint structure; performing the gluing operation on the corner joint gap of the sample to form a rubber strip; applying a predetermined force to the rubber strip to peel the rubber strip from the sample, and recording the peeling degree of the rubber strip; and based on the peeling degree, forming a sealing evaluation of the corner joint structure. The sealing performance of the sealed joint is evaluated by the sample, and the method is easy to operate, the evaluation effect is intuitive, and the cost is low; it can be used to evaluate the sealing effect of the conventional sealed joint and the sealing effect after service aging; it can be used to help determine the boundary conditions of various construction parameters in the gluing operation.

Description

Technical Field

[0001] The invention relates to the technical field of rail vehicle manufacturing, and in particular to a method and a device for evaluating the sealing performance of a fillet joint gap. Background Art

[0002] There are a large number of L-shaped connection areas in rail vehicles, which are connected mechanically or by welding. There are connection gaps in these areas, which need to be sealed with elastic sealants, such as sealing the floor cloth and wall panels in the car, sealing the washbasin and wall panels, sealing the welding parts, sealing the spot welding overlap area, etc. The application range is wide, involving almost all types of adhesive substrates. The commonly used method to verify its sealing performance is the DVS1618 adhesive strip peeling test. This test method is to apply an elastic adhesive strip on a single substrate, wait for it to solidify, and then manually peel it off and visually inspect the damage form of the adhesive layer to determine the bonding effect. From the above description, it can be seen that this test method cannot fully simulate the actual sealing joint structure, and the test results cannot fully prove the joint sealing effect. It can only determine whether the adhesion strength between the adhesive and the substrate is greater than the cohesive strength of the adhesive. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a method and a device for evaluating the sealing performance of a corner joint gap.

[0004] The present invention provides a method for evaluating the sealing performance of a corner joint gap, the method is for an L-shaped corner joint structure, the corner joint gap of the corner joint structure is sealed by gluing, and the method comprises:

[0005] Obtaining a sample of the corner joint structure;

[0006] Performing the gluing operation on the corner joints of the sample to form a glue strip;

[0007] Applying a predetermined force to the adhesive strip to peel the adhesive strip from the sample, and recording the peeling degree of the adhesive strip;

[0008] Based on the degree of peeling, a seal rating of the corner joint is formed.

[0009] According to a method for evaluating the sealing performance of a fillet joint provided by the present invention, the fillet joint structure is used for a rail vehicle.

[0010] According to a method for evaluating the sealing performance of a fillet joint provided by the present invention, obtaining a sample of the fillet joint structure comprises:

[0011] connecting two substrates vertically to form a sample of the corner joint structure;

[0012] The materials of the two substrates are the same as the materials of the substrates of the corner joint structure.

[0013] According to a method for evaluating the sealing performance of a corner joint provided by the present invention, the gluing operation is performed on the corner joint of the sample to form a glue strip, comprising:

[0014] Perform the gluing operation on the corner joints of the sample and record the construction parameters at the same time;

[0015] Only when the construction parameters meet the requirements of the gluing operation, it is determined that the glue strip is formed, otherwise, the gluing operation is performed again on the corner joint gap of the sample;

[0016] The gluing operation includes surface treatment before gluing and curing after gluing.

[0017] According to a method for evaluating the sealing performance of a corner joint provided by the present invention, a predetermined force is applied to the rubber strip so that the rubber strip is peeled off from the sample, comprising:

[0018] A predetermined force is applied to the adhesive strip to peel the adhesive strip from the sample, so that the adhesive strip undergoes a predetermined deformation amount and lasts for a predetermined time.

[0019] According to a method for evaluating the sealing performance of a corner joint provided by the present invention, recording the peeling degree of the adhesive strip comprises:

[0020] Obtaining the peeling length between the adhesive strip and the sample;

[0021] Obtaining the length of the adhesive strip;

[0022] The ratio of the peeling length to the length of the adhesive strip is taken as the peeling degree.

[0023] According to a method for evaluating the sealing performance of a corner joint provided by the present invention, obtaining the peeling length between the rubber strip and the sample comprises:

[0024] Obtaining the peeling length of two connection points between the adhesive strip and the sample;

[0025] The sum of the peeling lengths of the two connecting points is taken as the peeling length of the adhesive strip and the sample.

[0026] The present invention also provides a device for evaluating the sealing performance of a corner joint gap, the device is for an L-shaped corner joint structure, the corner joint gap of the corner joint structure is sealed by gluing, and the device comprises:

[0027] An acquisition module, used for acquiring a sample of the corner joint structure;

[0028] A gluing module, used for performing the gluing operation on the corner joints of the sample to form a glue strip;

[0029] A peeling module, used for applying a predetermined force to the adhesive strip so as to peel the adhesive strip from the sample and record the peeling degree of the adhesive strip;

[0030] An evaluation module is used to form a sealing evaluation of the fillet structure based on the peeling degree.

[0031] According to the device for evaluating the sealing performance of corner joints provided by the present invention, the acquisition module comprises:

[0032] A manufacturing unit, used to vertically connect two substrates to form a sample of the corner joint structure;

[0033] The materials of the two substrates are the same as the materials of the substrates of the corner joint structure.

[0034] According to the device for evaluating the sealing performance of corner joints provided by the present invention, the gluing module comprises:

[0035] A recording unit, used to perform the gluing operation on the corner joints of the sample and record construction parameters at the same time;

[0036] A judging unit, wherein the judging unit is used to judge whether the glue strip is formed only when the construction parameters meet the requirements of the glue coating operation, otherwise, the glue coating operation is performed again on the corner joint gap of the sample;

[0037] The gluing operation includes surface treatment before gluing and curing after gluing.

[0038] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the method for evaluating the sealing performance of a corner joint gap as described in any one of the above items are implemented.

[0039] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the method for evaluating the sealing performance of a corner joint gap as described in any one of the above items are implemented.

[0040] The method and device for evaluating the sealing performance of corner joints provided by the present invention can evaluate the sealing performance of sealed joints through samples, and the method is easy to operate, the evaluation effect is intuitive, and the cost is low; it can be used to evaluate the sealing effect of conventional sealed joints and after service aging; it can be used to help determine the boundary conditions of various construction parameters in the gluing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic flow chart of a method for evaluating the sealing performance of a fillet joint provided by the present invention;

[0043] Figure 2 A three-dimensional schematic diagram of applying a predetermined force to a rubber strip provided by the present invention;

[0044] Figure 3 for Figure 2 Schematic diagram of a side view;

[0045] Figure 4 A schematic diagram of the structure of a device for evaluating the sealing performance of a corner joint provided by the present invention;

[0046] Figure 5 A schematic diagram of the physical structure of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] The following is a detailed description of the method for evaluating the sealing performance of a corner joint provided in the embodiment of the present application through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0049] Figure 1 A schematic diagram of a flow chart of a method for evaluating the sealing performance of a corner joint provided by the present invention is shown in FIG. Figure 1 As shown, the present invention provides a method for evaluating the sealing performance of a corner joint gap. The method is for an L-shaped corner joint structure. The corner joint gap of the corner joint structure is sealed by gluing. The method may include the following steps.

[0050] S100, obtaining a sample of the corner joint structure.

[0051] Optionally, the corner joint structure is used in a rail vehicle.

[0052] Optionally, obtain a sample of the corner joint structure, including:

[0053] Two substrates are connected vertically to form a sample of a corner joint structure;

[0054] The materials of the two substrates are the same as the materials of the substrates of the corner joint structure.

[0055] Preferably, the size of the substrate is 200 mm×50 mm×10 mm.

[0056] Preferably, the long sides of the two substrates are vertically connected by mechanical or adhesive means to form an L-shaped fillet connection gap with a length of 200 mm.

[0057] By using samples that are much smaller than the actual corner joint structure, rapid evaluation can be achieved, saving costs while ensuring the reliability of the sealing performance evaluation.

[0058] S200, apply glue to the corner joints of the sample to form glue strips.

[0059] Optionally, applying glue to the corner joints of the sample to form glue strips includes:

[0060] Apply glue to the corner joints of the sample and record the construction parameters;

[0061] Only when the construction parameters meet the requirements of the gluing operation, the glue strip is formed. Otherwise, the glue is applied to the corner joints of the sample again.

[0062] Among them, the gluing operation includes surface treatment before gluing and waiting for curing after gluing.

[0063] Preferably, the various construction parameters include: temperature and humidity of the construction and curing environment, glue coating size, etc. Further, when the cross section of the glue strip is a right triangle, the glue coating size refers to the length of the two right-angled sides of the right triangle.

[0064] Preferably, the curing waiting time after glue application is 7 days.

[0065] The essence of recording various construction parameters is to require that the simulated gluing operation in the assessment process and the actual gluing operation of the corner joint structure have the same construction environment, such as the same construction temperature.

[0066] S300, applying a predetermined force to the adhesive strip to peel the adhesive strip from the sample, and recording the peeling degree of the adhesive strip.

[0067] Optionally, applying a predetermined force to the adhesive strip to peel the adhesive strip from the sample includes:

[0068] A predetermined force is applied to the adhesive strip to peel the adhesive strip from the sample, so that the adhesive strip undergoes a predetermined deformation amount and lasts for a predetermined time.

[0069] Optionally, record the degree of peeling of the adhesive strip, including:

[0070] Obtain the peeling length between the adhesive strip and the sample;

[0071] Get the length of the rubber strip;

[0072] The ratio of the peeling length to the length of the adhesive strip was taken as the peeling degree.

[0073] Optionally, obtaining the peeling length between the adhesive strip and the sample includes:

[0074] Obtain the peeling length of the two joints between the rubber strip and the sample;

[0075] The sum of the peeling lengths of the two joints is taken as the peeling length between the rubber strip and the sample.

[0076] Preferably, Figure 2 A three-dimensional schematic diagram of applying a predetermined force to a rubber strip provided by the present invention, Figure 3 for Figure 2 Schematic diagram of the side view of Figure 2 and 3 As shown, a pressing plate 4 (the pressing plate 4 is preferably made of PTFE or PP material, and the size of the pressing plate 4 is preferably 150mm×20mm×2mm) is used to press the rubber strip 3 downward at a distance of 1-2mm from the edge of the first substrate 1 of the sample, so that the rubber strip 3 is compressed and deformed downward by 1-2mm, and maintained for 2-5s to check whether the rubber strip 3 at this location (i.e., the 20mm wide rubber strip 3 pressed down by the pressing plate 4) is peeled off from the first substrate 1, and the rubber strip 3 is pressed sequentially to complete the detection of the entire 200mm length of the rubber strip 3, and the first peeling degree is calculated and recorded truthfully, and then the same method is used to detect the edge of the rubber strip 3 at the second substrate 2 of the sample, and the second peeling degree is calculated and recorded.

[0077] Furthermore, the present invention discloses a calculation formula for the degree of peeling as follows:

[0078] Degree of peeling = sum of peeling length of single-side substrate strips / total length of strips

[0079] By quantifying the degree of peeling, the strip sealing test is made highly adjustable, the evaluation results are intuitive, and it is also convenient to adjust the method of gluing operations, thereby improving the sealing effect of the gaps in the corner joint structure.

[0080] S400, based on the degree of peeling, the sealing performance of the diagonal joint structure is evaluated.

[0081] It should be noted that the sealing evaluation formed based on the degree of peeling is actually an evaluation of the sealing of the sample. However, due to the aforementioned steps, the sample of the present invention maintains sufficient consistency with the corner joint structure in terms of material, structure and gluing operation. Therefore, the sealing evaluation of the sample can be directly used as the sealing evaluation of the corner joint structure.

[0082] Preferably, based on the degree of peeling, the sealing performance of the diagonal joint structure is evaluated. Referring to Table 1 below, based on the degree of peeling calculated above, the sealing performance evaluation can be obtained, including 4 grades: excellent, better, good, and poor.

[0083] Serial number Degree of peeling grade Sealing 1 0 Ⅰ excellent 2 0-5％ Ⅱ better 3 5％-25％ Ⅲ good 4 ≥25％ Ⅳ Difference

[0084] Table 1

[0085] Furthermore, by repeatedly executing the aforementioned method steps according to the designed construction parameters, the effects of different construction parameters on the sealing performance can be distinguished. For example, the maximum construction temperature acceptable for the sealing performance to reach an excellent level can be determined, that is, the boundary conditions of the construction parameters required for each level of sealing performance can be determined.

[0086] This embodiment uses samples to evaluate the sealing performance of sealing joints. The method is easy to operate, the evaluation effect is intuitive, and the cost is low. It can be used to evaluate the sealing effect of conventional sealing joints and those after service aging. It can be used to help determine the boundary conditions of various construction parameters in the gluing operation.

[0087] The corner joint gap sealing performance evaluation device provided by the present invention is described below. The corner joint gap sealing performance evaluation device described below and the corner joint gap sealing performance evaluation method described above can be referred to each other.

[0088] Figure 4 A schematic diagram of the structure of a device for evaluating the sealing performance of a corner joint provided by the present invention is shown in FIG. Figure 4 As shown, the present invention also provides a device for evaluating the sealing performance of a corner joint gap, the device is for an L-shaped corner joint structure, and the corner joint gap of the corner joint structure is sealed by gluing, and the device comprises:

[0089] An acquisition module is used to acquire samples of corner joint structures;

[0090] Gluing module, used to apply glue to the corner joints of the sample to form glue strips;

[0091] A peeling module, used to apply a predetermined force to the adhesive strip so as to peel the adhesive strip from the sample and record the peeling degree of the adhesive strip;

[0092] The evaluation module is used to evaluate the sealing performance of diagonal joints based on the degree of peeling.

[0093] This embodiment uses samples to evaluate the sealing performance of sealing joints. The method is easy to operate, the evaluation effect is intuitive, and the cost is low. It can be used to evaluate the sealing effect of conventional sealing joints and those after service aging. It can be used to help determine the boundary conditions of various construction parameters in the gluing operation.

[0094] Figure 5 A schematic diagram of the physical structure of an electronic device provided by the present invention, such as Figure 5 As shown, the electronic device may include: a processor 510, a communication interface 520, a memory 530 and a communication bus 540, wherein the processor 510, the communication interface 520 and the memory 530 communicate with each other through the communication bus 540. The processor 510 may call the logic instructions in the memory 530 to execute a method for evaluating the sealing performance of a fillet joint, the method being for an L-shaped fillet joint structure, the fillet joint of the fillet joint structure being sealed by gluing, the method comprising:

[0095] Obtaining a sample of the corner joint structure;

[0096] Performing the gluing operation on the corner joints of the sample to form a glue strip;

[0097] Applying a predetermined force to the adhesive strip to peel the adhesive strip from the sample, and recording the peeling degree of the adhesive strip;

[0098] Based on the degree of peeling, a seal rating of the corner joint is formed.

[0099] In addition, the logic instructions in the above-mentioned memory 530 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0100] On the other hand, the present invention further provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer, the computer can execute the corner joint gap sealing performance evaluation method provided by the above methods, the method is for an L-shaped corner joint structure, the corner joint gap of the corner joint structure is sealed by gluing, the method comprises:

[0101] Obtaining a sample of the corner joint structure;

[0102] Performing the gluing operation on the corner joints of the sample to form a glue strip;

[0103] Applying a predetermined force to the adhesive strip to peel the adhesive strip from the sample, and recording the peeling degree of the adhesive strip;

[0104] Based on the degree of peeling, a seal rating of the corner joint is formed.

[0105] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to perform the above-mentioned corner joint gap sealing performance evaluation method, wherein the method is for an L-shaped corner joint structure, wherein the corner joint gap of the corner joint structure is sealed by gluing, and the method comprises:

[0106] Obtaining a sample of the corner joint structure;

[0107] Performing the gluing operation on the corner joints of the sample to form a glue strip;

[0108] Applying a predetermined force to the adhesive strip to peel the adhesive strip from the sample, and recording the peeling degree of the adhesive strip;

[0109] Based on the degree of peeling, a seal rating of the corner joint is formed.

[0110] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0111] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for evaluating the sealing performance of a corner joint, characterized in that: The method is for an L-shaped corner joint structure, wherein the corner joint gap of the corner joint structure is sealed by gluing, and the method comprises: Obtaining a sample of the corner joint structure; Performing the gluing operation on the corner joints of the sample to form a glue strip; Applying a predetermined force to the adhesive strip to peel the adhesive strip from the sample, and recording the peeling degree of the adhesive strip; Based on the degree of peeling, a seal rating of the corner joint is formed.

2. The method for evaluating the sealing performance of a fillet joint according to claim 1, characterized in that: The corner joint structure is used for rail vehicles.

3. The method for evaluating the sealing performance of a fillet joint according to claim 1, characterized in that: Obtaining a sample of the corner joint structure, including: connecting two substrates vertically to form a sample of the corner joint structure; The materials of the two substrates are the same as the materials of the substrates of the corner joint structure.

4. The method for evaluating the sealing performance of a fillet joint according to claim 1, characterized in that: The gluing operation is performed on the corner joints of the sample to form a glue strip, including: Perform the gluing operation on the corner joints of the sample and record the construction parameters at the same time; Only when the construction parameters meet the requirements of the gluing operation, it is determined that the glue strip is formed, otherwise, the gluing operation is performed again on the corner joint gap of the sample; The gluing operation includes surface treatment before gluing and curing after gluing.

5. The method for evaluating the sealing performance of a fillet joint according to claim 1, characterized in that: Applying a predetermined force to the adhesive strip so as to peel the adhesive strip from the sample comprises: A predetermined force is applied to the adhesive strip to peel the adhesive strip from the sample, so that the adhesive strip undergoes a predetermined deformation amount and lasts for a predetermined time.

6. The method for evaluating the sealing performance of a fillet joint according to claim 1, characterized in that: The degree of peeling of the adhesive strip is recorded, including: Obtaining the peeling length between the adhesive strip and the sample; Obtaining the length of the adhesive strip; The ratio of the peeling length to the length of the adhesive strip is taken as the peeling degree.

7. The method for evaluating the sealing performance of a fillet joint according to claim 6, characterized in that: Obtaining the peeling length between the adhesive strip and the sample, including: Obtaining the peeling length of two connection points between the adhesive strip and the sample; The sum of the peeling lengths of the two connecting points is taken as the peeling length of the adhesive strip and the sample.

8. A device for evaluating the sealing performance of a corner joint, characterized in that: The device is for an L-shaped corner joint structure, and the corner joint gap of the corner joint structure is sealed by gluing. The device comprises: An acquisition module, used for acquiring a sample of the corner joint structure; A gluing module, used for performing the gluing operation on the corner joints of the sample to form a glue strip; A peeling module, used for applying a predetermined force to the adhesive strip so as to peel the adhesive strip from the sample and record the peeling degree of the adhesive strip; An evaluation module is used to form a sealing evaluation of the fillet structure based on the peeling degree.

9. The device for evaluating the sealing performance of a fillet joint according to claim 8, characterized in that: The acquisition module comprises: A manufacturing unit, used to vertically connect two substrates to form a sample of the corner joint structure; The materials of the two substrates are the same as the materials of the substrates of the corner joint structure.

10. The device for evaluating the sealing performance of a fillet joint according to claim 8, characterized in that: The gluing module comprises: A recording unit, used to perform the gluing operation on the corner joints of the sample and record construction parameters at the same time; A judging unit, wherein the judging unit is used to judge whether the glue strip is formed only when the construction parameters meet the requirements of the glue coating operation, otherwise, the glue coating operation is performed again on the corner joint gap of the sample; The gluing operation includes surface treatment before gluing and curing after gluing.

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