Method for dissecting and testing zero-degree stripping adhesion performance of belted layer of all-steel tire

Abstract

The invention discloses an all-steel tire belted layer zero-degree stripping adhesion property dissection and test method, which comprises the following steps: carrying out X-ray illumination positioning on a tire, determining a cutting position identifier, and cutting the tire along a direction vertical to the rolling direction of the tire to obtain a cut sample; identifying the number M of tire belted layers, and determining a cutting position; cutting and sampling the cut sample according to the cutting position to obtain a to-be-trimmed belted layer sample; cutting and trimming the to-be-trimmed belted layer sample to obtain a test sample; performing an interlayer bonding strength test on the test sample to obtain a stripping force N; and calculating the peeling strength P between the belted layers of the test sample by using the peeling force N so as to dissect and test the zero-degree peeling adhesion performance of the belted layers of the all-steel tire. According to the method, the defects and deficiencies of an existing testing technology are overcome, the accuracy of dissecting and analyzing the stripping and bonding performance of the tire belted layer is effectively improved, reliable data support is provided for tire structure optimization, quality control and safety improvement, and the method has wide application and popularization value.

Description

Technical Field

[0001] This application relates to the field of zero-degree peel technology for tire belt layers, and more specifically, to a method for dissecting and testing the zero-degree peel adhesion performance of all-steel tire belt layers. Background Technology

[0002] As the only component of a vehicle in contact with the ground, tires directly impact a vehicle's handling, safety, comfort, and fuel economy. To gain a deeper understanding of tire physical properties and provide a theoretical basis for their design, manufacturing, and use, anatomical analysis of tires is crucial. However, current technologies for testing tire belt layer adhesion performance generally suffer from insufficient sampling and positioning accuracy and a lack of standardized procedures. Cutting deviations can easily lead to samples that do not match actual stress scenarios. Furthermore, the testing methods lack specificity, making it difficult to accurately represent the core adhesion state between layers. Additionally, some methods rely on complex, specialized equipment, making operation cumbersome and difficult to promote, thus failing to provide accurate and reliable support for tire quality control and structural optimization.

[0003] Therefore, the existing technology has defects and urgently needs improvement. Summary of the Invention

[0004] In view of the above problems, the purpose of this invention is to overcome the defects and deficiencies of existing testing technologies, and to mainly study the analysis and application of the interlayer adhesive strength performance of steel belt bundles in finished tires.

[0005] The first aspect of this invention provides a method for dissecting and testing the zero-degree peel adhesion performance of the belt layer in an all-steel tire, comprising: The tire is positioned using X-ray imaging to determine the cutting location. According to the cutting position marking, the tire is cut along a direction perpendicular to the tire rolling direction to obtain a first sample to be cut and a second sample to be cut; Identify the number of tire belt layers M, and determine the first and second cutting positions based on the number of tire belt layers M. The first sample to be cut is cut and sampled at the first cutting position, and the second sample to be cut is cut and sampled at the second cutting position to obtain the belt layer sample to be trimmed; The sample of the belt layer to be repaired is cut and repaired to obtain a test sample that meets the test requirements; The peel force N was obtained by performing an interlayer adhesion strength test on the test sample. The peel strength P between the corresponding belt layers of the test sample is calculated using the peel force N.

[0006] In this solution, the step of X-ray irradiation and positioning of the tire, and marking the cutting location, includes: Before cutting the tire cross section, the tire is positioned by X-ray irradiation to determine the location of the belt layer joint. Based on the analysis of the location of the belt layer connector, the cutting location marker is determined.

[0007] In this solution, identifying the number of tire belt layers M and determining the first and second cutting positions based on the number of tire belt layers M includes: Obtain the number of belt layers M of the tire; M+1 cross-sectional sampling locations are determined based on the number of belt layers M; The sampling position of the even-numbered cross-section is determined as the first cutting position, and the sampling position of the odd-numbered cross-section is determined as the second cutting position.

[0008] In this scheme, the step of cutting and sampling the first sample to be cut at a first cutting position and the second sample to be cut at a second cutting position to obtain the belt layer sample to be trimmed includes: The cutting sequence is determined by the tire from the inside out. Each first cutting position of the first sample to be cut is cut in turn, and each second cutting position of the second sample to be cut is cut in turn to obtain the belt layer sample to be repaired.

[0009] This plan also includes: The belt layer samples to be repaired include: samples where the carcass ply is connected to the belt layer, samples where the belt layer is connected to the belt layer, and samples where the belt layer is connected to the tread layer. The sample where the belt layer and the tread layer are connected is subjected to tread adhesive removal treatment to ensure that the thickness of the base layer adhesive meets the preset thickness range.

[0010] In this scheme, the step of cutting and trimming the sample of the belt layer to be trimmed to obtain a test sample that meets the testing requirements includes: The sample of the belt layer to be repaired is measured from the center position along the direction of the belt layer wire arrangement to determine the area to be treated; The area to be processed is analyzed, and the wire stripping position is determined by combining the preset effective stripping width. The stripped area of ​​the steel wire is then cut off. A cut is made along the zero-degree direction of the steel wire at the peeling start position to obtain a test sample that meets the test requirements within a preset depth range.

[0011] This plan also includes: The test sample is refined to remove burrs, irregular glue edges, and excess glue nodules from the surface of the test sample. Verify that the size and flatness of the test sample meet the preset test requirements.

[0012] In this scheme, the step of obtaining the peel force N by performing an interlayer adhesion strength test on the test sample includes: Each of the test samples was tested according to a preset standard, and the peel force N when the corresponding belt layer was torn during the test was recorded.

[0013] In this scheme, calculating the peel strength P between the corresponding belt layers of the test sample using the peel force N includes: Calculate the peel strength P between the two belt layers based on the peel force: ; Where H is the peel width between the two belt layers. Attached Figure Description

[0014] Figure 1 This invention provides a flowchart illustrating the dissection and testing method for the zero-degree peel adhesion performance of the belt layer in an all-steel tire. Figure 2 A flowchart of the method for determining the first and second cutting positions provided by the present invention is shown; Figure 3 A schematic diagram of the preparation of the tire cross-section sample of the present invention is shown; Figure 4 The present invention provides schematic diagrams of two common belt layer orientation arrangements. Figure 5 A schematic diagram of the left-left co-directional structure belt layer peeling method is shown; Figure 6 A schematic diagram of the stripping method for the left-right cross structure belt layer is shown. Detailed Implementation

[0015] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0017] Figure 1 The flowchart illustrates a method for dissecting and testing the zero-degree peel adhesion performance of the belt layer in an all-steel tire, as provided by the present invention.

[0018] like Figure 1As shown, this invention discloses a method for dissecting and testing the zero-degree peel adhesion performance of the belt layer in an all-steel tire, including: S101, X-ray irradiation is performed on the tire to determine the cutting location; S102, according to the cutting position mark, the tire is cut along the direction perpendicular to the tire rolling to obtain the first sample to be cut and the second sample to be cut; S103, identify the number of tire belt layers M, and determine the first and second cutting positions based on the number of tire belt layers M; S104, the first sample to be cut is cut and sampled at the first cutting position, and the second sample to be cut is cut and sampled at the second cutting position to obtain the belt layer sample to be trimmed; S105, the sample of the belt layer to be repaired is cut and repaired to obtain a test sample that meets the test requirements; S106, The peel force N is obtained by testing the interlayer adhesion strength of the test sample; S107, the peel strength P between the corresponding belt layers of the test sample is calculated by peel force N.

[0019] According to an embodiment of the present invention, the selected tire is first X-rayed to locate the overlap position of the belt layers, and this position is avoided when confirming the cutting position mark. Based on the confirmed cutting position mark, the tire is cut in sections perpendicular to the tire's rolling direction to obtain a preliminary sample to be cut. When cutting the sample, the cutter should be inserted at a position centered between the belt layers to prevent excessive force on the sample-clamping side from removing the rubber coating of the belt layer wires, which would affect the subsequent peel force measurement. The number of tire belt layers is obtained, and the cross-sectional sampling position is determined based on the number of tire belt layers. The cutting sequence is determined according to the tire's inner to outer order, and the sample to be cut is cut along the tire's rolling direction at the determined cutting position to obtain a belt layer sample to be repaired. The belt layer samples to be repaired include: samples where the carcass ply is connected to the belt layer, samples where belt layers are connected to each other, and samples where the belt layer is connected to the tread layer. Samples where the belt layer is connected to the tread layer require tread rubber removal. The area to be processed is measured from the center of the belt layer sample along the direction of the belt layer wire arrangement. The area to be processed is analyzed, retaining the effective peel width within the preset range, and the outer side is corrected with a tool. Based on the retained effective peel width, the wire peeling position is determined, and the wire is cut. At the peeling start position, a cut is made along the zero-degree direction of the wire to obtain a test sample meeting the testing requirements within the preset depth range. The test samples meeting the requirements are then refined, removing burrs, irregular adhesive edges, and excess adhesive nodules from the surface. All test samples are tested one by one, and the peel force N generated during the tearing process of the belt layer is simultaneously collected and recorded. The peel strength P between the two belt layers is calculated based on the recorded peel force N.

[0020] According to an embodiment of the present invention, X-ray irradiation positioning of the tire to determine the cutting position marking further includes: Before cutting the tire section, the tire is positioned by X-ray irradiation to determine the location of the belt layer joint. This provides a key basis for subsequent cutting position confirmation, avoiding cutting deviations caused by failure to identify the joint position from the source, and ensuring the structural integrity of the samples to be tested later.

[0021] Based on the analysis of the belt layer connector location, the cutting location markers are determined. Clear cutting location markers can standardize on-site operations, avoid positional deviations during manual cutting, and ensure that the samples obtained after cutting are not affected by the structure of the belt layer connector location.

[0022] It should be noted that the steel wire cords at the belt layer joint have a special structure with overlapping or sparse distribution, which differs from the cord distribution density and stress state in the normal area. Therefore, to ensure the accuracy and objectivity of the test results, the belt layer joint should be avoided when confirming the cutting marks.

[0023] Figure 2 A flowchart illustrating the determination of the cutting position provided by the present invention is shown.

[0024] like Figure 2 As shown, according to an embodiment of the present invention, identifying the number of tire belt layers M, and determining the first and second cutting positions based on the number of tire belt layers M, includes: S201, obtain the number of belt layers M of the tire; S202, determine the M+1 cross-sectional sampling locations based on the number of belt layers M; S203, the sampling position of the even-numbered section is determined as the first cutting position, and the sampling position of the odd-numbered section is determined as the second cutting position.

[0025] It should be noted that obtaining the number of tire belt layers, M, provides a core basis for subsequent sampling location planning. Determining M+1 cross-sectional sampling locations based on the number of tire belt layers, ensures that the sampling locations cover the upper and lower interfaces and interlayer areas of all belt layers. The even-numbered cross-sectional sampling location is determined as the first cutting location, and the odd-numbered cross-sectional sampling location is determined as the second cutting location. To ensure that there are no fewer than 3 sets of test samples per layer, when confirming the cutting locations, it is necessary to ensure that 300mm*4 cross-sections can be cut. The specific number of test sample sets and cross-sections required can be set by those skilled in the art according to actual needs.

[0026] According to an embodiment of the present invention, a first sample to be cut is cut and sampled at a first cutting position, and a second sample to be cut is cut and sampled at a second cutting position to obtain a sample of the belt layer to be trimmed, comprising: The cutting sequence is determined by the tire from the inside out. Each first cutting position of the first sample to be cut is cut sequentially along the tire rolling direction, and each second cutting position of the second sample to be cut is cut to obtain the belt layer sample to be repaired.

[0027] It should be noted that, taking a 4-layer steel wire harness as an example, the test involves the interlayer bonding strength of each steel wire harness layer, so the two cross sections need to be decomposed into 5 groups of samples.

[0028] like Figure 3 As shown, the sampling order for the first cross-section is as follows: Group 1: Carcass ply and belt layer 1; Group 3: Belt layers 2 and 3; Group 5: Belt layer 4 and tread compound. For Group 5, the tread compound needs to be removed, and the thickness of the tread base layer should remain at 5mm-6mm. The sampling order for the second cross-section is as follows: Group 2: Belt layers 1 and 2; Group 4: Belt layers 3 and 4. Sampling is performed to obtain a complete set of test samples.

[0029] According to an embodiment of the present invention, the sample of the belt layer to be trimmed is cut and trimmed to obtain a test sample that meets the testing requirements, including: The sample of the belt layer to be repaired was measured from the center along the direction of the steel wire arrangement in the belt layer. A 60mm section was measured as the area to be treated, and the area to be treated was precisely located by conforming to the stress texture of the belt layer. Structural analysis of the area to be treated was performed, and the center of the area to be treated was determined by combining the preset effective peel width with the center of the steel wire peel width. The preset effective peel width is 24.5mm-25.5mm. The preset effective peel width ensures the validity and comparability of the test data, ensures that the peel position is focused on the core adhesive surface, and avoids interference from non-critical areas in the test results. Precise wire cutting is performed at the stripping location to eliminate the interference of the wire's own strength on the interlayer peel force test and reduce test errors; At the peeling start position, a cut is made along the zero-degree direction of the steel wire to meet the preset depth range, which is 45mm-55mm. The zero-degree cut conforms to the stress direction of the belt layer during actual driving. The preset depth range can avoid the cut being too shallow to effectively start peeling or too deep to damage the interlayer structure, and finally obtain a test sample that meets the test requirements.

[0030] It should be noted that the size of the area to be processed and the effective peeling width can be set by those skilled in the art according to actual needs.

[0031] like Figure 4As shown, the conventional designs for the belt ply of all-steel tires include left-left-right-right arrangements and left-right-left-right-right cross arrangements. Both of these arrangements allow for a tighter grip on the crown ply. However, the cross structure of the crown ply introduces many uncontrollable factors into the peel test. In contrast, the zero-degree peel method results in a smooth peel surface unaffected by the belt ply angle. Therefore, this method provides more reliable performance data that more closely reflects actual conditions, effectively improving the accuracy of product verification.

[0032] like Figure 5 , 6 As shown, schematic diagrams of the stripping methods for left-left co-directional structure belt layers and left-right cross structure belt layers are displayed. During sample preparation, as shown in the figure, a cut with a depth of 45mm-55mm needs to be made at the end position of the belt layer steel wire along the zero-degree direction of the steel wire. This allows the sample to be fully clamped in the fixture of the testing machine, avoiding the impact of improper clamping on the test data.

[0033] According to an embodiment of the present invention, it further includes: Using tools such as blade grinding, sandpaper polishing, or special precision finishing tools, the edges and surfaces of the cut test samples are finely processed to thoroughly remove burrs, uneven and irregular glue edges, and excess glue nodules attached to the surface generated during the cutting process, ensuring that the sample edges are smooth and regular and the surface is clean and flat. Verify the dimensions and flatness of the test sample to ensure they meet the preset test requirements; use measuring tools with the required accuracy (such as vernier calipers, micrometers, flatness testers, etc.) to measure the key dimensions (such as length) and flatness of the refined test sample to ensure they meet the preset test requirements.

[0034] It should be noted that the preset test requirements shall be set by those skilled in the art according to actual needs. For example, the flatness of the test sample shall meet the requirement that the flatness deviation between any two test points is ≤0.08mm, the overall flatness error shall not exceed ±10% of the sample thickness tolerance, and the size of the test sample shall not affect the effective peel width of 24.5mm-25.5mm.

[0035] According to an embodiment of the present invention, obtaining the peel force N by performing an interlayer adhesion strength test on a test sample includes: Each test sample was tested according to the preset standard and the peel force N when the corresponding belt layer was torn during the test was recorded. The preset standard is the test method for the performance of rubber-fabric bonding (such as tire belt layer, conveyor belt skeleton fabric, etc.) specified in GB / T532.

[0036] It should be noted that, considering that the tire's internal pressure is affected by the load during driving, the end point of the belt layer at the tire tread contact point may stretch and shear outwards severely, leading to tearing of the end point, the clamping requirements for each sample during testing are specified to ensure that the sample layer in the zero-degree direction of the steel wire is clamped in the upper fixture for testing.

[0037] According to an embodiment of the present invention, the peel strength P between the corresponding belt layers of the test sample is calculated by peel force N, including: Calculate the peel strength P between the two belt layers based on the peel force: ; Where H is the peel width between the two belt layers.

[0038] All information (including but not limited to user equipment information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.), and signals (including but not limited to signals transmitted between user terminals and other devices) involved in this application have been authorized by the user or fully authorized by all parties, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, the "number of belt layers M" and "peel force N" involved in this disclosure were obtained with full authorization.

[0039] This invention discloses a method for dissecting and testing the zero-degree peel adhesion performance of the belt layer in an all-steel tire. The method includes: X-ray positioning of the tire to determine the cutting position marker; cutting the tire perpendicular to the tire's rolling direction to obtain a cut sample; identifying the number of belt layers M and determining the cutting position; cutting the cut sample according to the cutting position to obtain a belt layer sample to be repaired; cutting and repairing the belt layer sample to obtain a test sample; testing the interlayer adhesion strength of the test sample to obtain the peel force N; and calculating the peel strength P between the belt layers of the test sample using the peel force N, thereby achieving the dissection and testing of the zero-degree peel adhesion performance of the all-steel tire belt layer. This invention overcomes the defects and deficiencies of existing testing technologies, effectively improves the accuracy of the dissection and analysis of the peel adhesion performance of tire belt layers, provides reliable data support for tire structure optimization, quality control, and safety improvement, and has broad application value.

[0040] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0041] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0042] In addition, in the various embodiments of the present invention, each functional unit can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0043] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0044] Alternatively, if the integrated units of this invention are implemented as software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, ROM, RAM, magnetic disks, or optical disks.

Claims

1. A method for dissecting and testing the zero-degree peel adhesion performance of the belt layer in an all-steel tire, characterized in that, include: The tire is positioned using X-ray imaging to determine the cutting location. According to the cutting position marking, the tire is cut along a direction perpendicular to the tire rolling direction to obtain a first sample to be cut and a second sample to be cut; Identify the number of tire belt layers M, and determine the first and second cutting positions based on the number of tire belt layers M. The first sample to be cut is cut and sampled at the first cutting position, and the second sample to be cut is cut and sampled at the second cutting position to obtain the belt layer sample to be trimmed; The sample of the belt layer to be repaired is cut and repaired to obtain a test sample that meets the test requirements; The peel force N was obtained by performing an interlayer adhesion strength test on the test sample. The peel strength P between the corresponding belt layers of the test sample is calculated using the peel force N.

2. The method for dissecting and testing the zero-degree peel adhesion performance of the belt layer in an all-steel tire according to claim 1, characterized in that, The process of X-raying the tire for positioning and marking the cutting location includes: Before cutting the tire section, the tire is positioned by X-ray irradiation to determine the location of the belt layer joint; Based on the analysis of the location of the belt layer connector, the cutting location marker is determined.

3. The method for dissecting and testing the zero-degree peel adhesion performance of the belt layer in an all-steel tire according to claim 1, characterized in that, The step of identifying the number of tire belt layers M and determining the first and second cutting positions based on the number of tire belt layers M includes: Obtain the number of belt layers M of the tire; M+1 cross-sectional sampling locations are determined based on the number of belt layers M; The sampling position of the even-numbered cross-section is determined as the first cutting position, and the sampling position of the odd-numbered cross-section is determined as the second cutting position.

4. The method for dissecting and testing the zero-degree peel adhesion performance of the belt layer in an all-steel tire according to claim 1, characterized in that, The step of cutting and sampling the first sample to be cut at a first cutting position, and cutting and sampling the second sample to be cut at a second cutting position to obtain a sample of the belt layer to be trimmed includes: The cutting sequence is determined by the tire from the inside out. Each first cutting position of the first sample to be cut is cut in turn, and each second cutting position of the second sample to be cut is cut in turn to obtain the belt layer sample to be repaired.

5. The method for dissecting and testing the zero-degree peel adhesion performance of the belt layer in an all-steel tire according to claim 4, characterized in that, The sample of the belt layer to be repaired includes: Samples of tire carcass ply connected to belt layer, samples of belt layer connected to belt layer, and samples of belt layer connected to tread layer; The sample where the belt layer and the tread layer are connected is subjected to tread adhesive removal treatment to ensure that the thickness of the base layer adhesive meets the preset thickness range.

6. The method for dissecting and testing the zero-degree peel adhesion performance of the belt layer in an all-steel tire according to claim 1, characterized in that, The step of cutting and trimming the belt layer sample to be trimmed to obtain a test sample that meets the testing requirements includes: The sample of the belt layer to be repaired is measured from the center position along the direction of the belt layer wire arrangement to determine the area to be treated; The area to be processed is analyzed, and the wire stripping position is determined by combining the preset effective stripping width. The stripped area of ​​the steel wire is then cut off. A cut is made along the zero-degree direction of the steel wire at the peeling start position to obtain a test sample that meets the test requirements within a preset depth range.

7. The method for dissecting and testing the zero-degree peel adhesion performance of the belt layer in an all-steel tire according to claim 6, characterized in that, Also includes: The test sample is refined to remove burrs, irregular glue edges, and excess glue nodules from the surface of the test sample. Verify that the size and flatness of the test sample meet the preset test requirements.

8. The method for dissecting and testing the zero-degree peel adhesion performance of the belt layer in an all-steel tire according to claim 1, characterized in that, The step of obtaining the peel force N by performing interlayer adhesion strength testing on the test sample includes: Each of the test samples was tested according to a preset standard, and the peel force N when the corresponding belt layer was torn during the test was recorded.

9. The method for dissecting and testing the zero-degree peel adhesion performance of the belt layer in an all-steel tire according to claim 1, characterized in that, The step of calculating the peel strength P between the corresponding belt layers of the test sample using the peel force N includes: Calculate the peel strength P between the two belt layers based on the peel force: ； Where H is the peel width between the two belt layers.

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