A method and system for improved adjustment of tire footprint

Abstract

The application discloses a tire footprint improvement adjustment method and system, and the method comprises the following steps: obtaining the outer circumferential length of a tire before and after inflation to obtain the relative inflation rate of the outer circumferential length of the tire; obtaining the footprint of the tire to obtain a footprint shape coefficient and determine whether the footprint shape meets the requirements; if the requirements are not met, modeling the relative inflation rate of the outer circumferential length and the footprint shape coefficient, and quantifying the footprint shape; establishing a model of the tire thickness and the relative inflation rate of the outer circumferential length to obtain the relationship between the tire thickness and the relative inflation rate of the outer circumferential length, and improving the tire footprint by adjusting the tire thickness; the model of the change of the tire footprint shape and the change of the relative inflation rate of the outer circumferential length and the model of the tire thickness and the relative inflation rate of the outer circumferential length can form data-based and index-based footprint improvement, the tire thickness is adjusted based on detailed data to improve the footprint, the work efficiency is improved, and a quantifiable index is formed.

Description

Technical Field

[0001] This invention relates to the field of tire track improvement technology, specifically to a tire track improvement and adjustment method and system. Background Technology

[0002] As a relatively complex rubber product, all-steel radial tires are an important component of vehicles. The tire's contact patch and pressure distribution are the main factors affecting tire tread wear and rolling resistance. Increasing the contact area between the tire and the ground is an effective way to improve vehicle stability. Therefore, in recent years, most passenger cars have adopted low-profile tires, i.e. tires with a larger width-to-height ratio, to improve their performance by increasing the contact area between the tire and the ground.

[0003] In the prior art, to improve the wear performance of tire treads, the tread pattern and grooves are usually modified. For example, Chinese invention patent CN107150557B discloses a tire with a crown main groove extending continuously along the tire circumference on the tread surface, and a shoulder main groove extending continuously along the tire circumference on the outer side of the crown main groove on the tire axial direction. The crown main groove is serrated, and the serration is formed alternately by a long side of the crown that is inclined to one side relative to the tire circumference and a short side of the crown that is inclined in the opposite direction and is shorter than the long side of the crown in the tire circumference. The shoulder main groove is serrated, and the serration is formed alternately by a long side of the shoulder that is inclined to one side relative to the tire circumference and a shoulder side that is inclined in the opposite direction and is shorter than the long side of the shoulder in the tire circumference. The above structure reduces tire wear.

[0004] However, the existing methods for improving wear performance cannot specifically improve the parts of the tire that are prone to wear. Currently, there are some existing methods to improve tire wear resistance and service life by improving the tire's contact patch, but these methods rely on the worker's experience and require multiple adjustments to the tire's patch to meet the requirements, which reduces work efficiency. Furthermore, the quality of the tires adjusted in the end is not uniform, and it is impossible to achieve standardized adjustment of the tire's patch. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a method for improving and adjusting tire tracks. By establishing a model with specific quantitative data indicators, the tire thickness is adjusted to change the tire's circumferential expansion rate, ultimately achieving the goal of improving tire tracks.

[0006] The technical solution of the present invention is as follows:

[0007] In a first aspect of the present invention, a method for improving and adjusting tire tracks is provided, comprising the following steps:

[0008] Step 1: Obtain the outer circumference of the tire before and after inflation to obtain the relative expansion rate of the tire's outer circumference;

[0009] Step 2: Obtain the tire tracks, obtain the track shape coefficient, and determine whether the track shape meets the requirements;

[0010] Step 3: If the requirements are not met, establish a quantitative model for the relative expansion rate of the outer perimeter and the imprint shape coefficient;

[0011] Step 4: Establish a model of the relative expansion rate of tire thickness and outer perimeter to obtain the relationship between tire thickness and outer perimeter. Improve tire tracks by adjusting tire thickness.

[0012] In a second aspect of the invention, a tire track improvement and adjustment system is provided, comprising:

[0013] The module for obtaining the relative expansion rate of the outer perimeter is configured to: obtain the outer perimeter of the tire before and after inflation, and obtain the relative expansion rate of the outer perimeter of the tire;

[0014] The imprint shape coefficient acquisition module is configured to: acquire the tire imprint, obtain the imprint shape coefficient, and determine whether the imprint shape meets the requirements;

[0015] The imprint shape quantization module is configured to: if the requirements are not met, establish a quantization model for the relative expansion rate of the outer perimeter and the imprint shape coefficient;

[0016] The tire imprint improvement and adjustment module is configured to: establish a model of the relative expansion rate of tire thickness and outer perimeter, obtain the relationship between tire thickness and relative expansion rate of outer perimeter, and improve tire imprint by adjusting tire thickness.

[0017] One or more technical solutions of the present invention have the following beneficial effects:

[0018] (1) The tire imprint improvement and adjustment method provided by the present invention can form a data-driven and index-driven imprint improvement by establishing a model of the tire imprint coefficient and the relative expansion rate of the tire outer perimeter, as well as a model of the tire thickness and the tire outer perimeter expansion rate. The tire thickness is adjusted through detailed data to improve the imprint, which is accurate and improves work efficiency, and forms a quantifiable index.

[0019] (2) The tire imprint improvement and adjustment method provided by the present invention, by establishing a model of tire imprint shape change and tire outer perimeter relative expansion rate change, can obtain that the tire outer perimeter relative expansion rate change trend can represent the tire imprint shape change trend. By establishing a model of tire thickness and tire outer perimeter expansion rate, it can be obtained that tire thickness and tire outer perimeter expansion rate are negatively correlated, thereby establishing a connection between tire thickness and tire imprint shape, realizing the purpose of adjusting tire imprint by changing tire outer perimeter expansion rate through adjusting tire thickness.

[0020] (3) The tire imprint improvement and adjustment method provided by the present invention can directly improve the tire imprint, improve the wear resistance and service life of the tire, and can achieve standardized adjustment of the tire imprint machine, thereby improving the quality of the tire. Attached Figure Description

[0021] Figure 1 This is a diagram showing the position of the tire's outer circumference as measured in Embodiment 1 of the present invention;

[0022] Figure 2 This is a location diagram for measuring the ground contact length of the tire track in Embodiment 1 of the present invention;

[0023] Figure 3(a) shows the model of the relative expansion rate of the outer perimeter of Scheme 1 and Scheme 2; Figure 3(b) shows the model of the imprint shape coefficient of Scheme 1 and Scheme 2; Figure 3(c) shows the tire imprint of Scheme 1 and Scheme 2.

[0024] Figure 4(a) shows the design thickness and relative expansion rate data for Scheme 1 and Scheme 2; Figure 4(b) shows the model of tire thickness and relative expansion rate of outer perimeter.

[0025] Figure 5(a) shows the tire tracks before the improvement of Scheme 2, and Figure 5(b) shows the tire tracks after the improvement of Scheme 2. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Example 1

[0028] In a typical embodiment of the present invention, a method for improving and adjusting tire tracks is proposed, comprising the following steps:

[0029] Step 1: Obtain the outer circumference of the tire before and after inflation to obtain the relative expansion rate of the tire's outer circumference;

[0030] The outer perimeter includes the circumference at the center of the tread, the tire circumference at the shoulder, and the circumference at the point where the tread center is divided into three equal parts from the shoulder.

[0031] The relative expansion rate of the outer perimeter is calculated according to the following formula:

[0032] λ i =(X i -X i0 ) / (X0-X 00 )

[0033] In the formula, λ i Let X be the relative expansion rate of the outer perimeter at point i. i X is the circumference of the inflated tire. i0Let Xi be the circumference of the uninflated tire at point i, and X0 be the circumference of the inflated tire at the center. 00 The circumference of the tire before inflation is at the center of the tire; i is 1, 2, ..., 6, indicating the position where the outer circumference is measured.

[0034] Step 2: Obtain the tire tracks, obtain the track shape coefficient, and determine whether the track shape meets the requirements;

[0035] The tire's imprint was tested using a comprehensive strength testing machine to obtain the tire imprint; the imprint shape factor was calculated using the following formula:

[0036] α i =L i / L0

[0037] In the formula, α i Let L be the imprint shape coefficient at point i. i L1 is the grounding length of the imprint at point i, and L0 is the grounding length of the imprint at the center of the tire.

[0038] Specifically, determining whether the tire track shape meets the requirements includes: determining whether the outer perimeter of the track is round or square. If so, the tire track shape meets the requirements and no track improvement or adjustment is needed; otherwise, the tire track shape does not meet the requirements and track improvement or adjustment is needed.

[0039] Step 3: If the requirements are not met, model the relative expansion rate of the outer perimeter and the imprint shape coefficient, and quantify the imprint shape.

[0040] The process involves modeling the relative expansion rate of the tire's outer circumference and the tire footprint shape coefficient to quantify the footprint shape. This includes determining the relationship between the relative expansion rate of the tire's outer circumference and the tire footprint shape coefficient, demonstrating that the trend of change in the relative expansion rate of the tire's outer circumference reflects the trend of change in the tire footprint shape. The shape of the tire footprint can be represented by the change in the tire footprint shape coefficient. By comparing the relative expansion rate of the outer circumference and the tire footprint shape coefficient, a certain relationship is found between their trends (the trend here refers to the change in the amount of change from one point to another). Therefore, the tire footprint shape can be digitized using the tire footprint shape coefficient, and the trend of change in the tire's relative expansion rate of the outer circumference can then represent the trend of change in the tire footprint shape.

[0041] Step 4: If the requirements are not met, establish a model of the relative expansion rate of tire thickness and outer perimeter to obtain the relationship between tire thickness and outer perimeter. Improve tire tracks by adjusting tire thickness.

[0042] The process of establishing a model for the relative expansion rate of tire thickness and outer perimeter includes: obtaining the thickness and relative expansion rate at different locations of the tire in two different design schemes, fitting the thickness and relative expansion rate to obtain a model for the relative expansion rate of tire thickness and outer perimeter.

[0043] According to the model, the relationship between tire thickness and the relative expansion rate of the outer perimeter is negatively correlated.

[0044] Tire tread can be improved by adjusting tire thickness, including adjusting tire thickness at locations that do not meet requirements, and by increasing or decreasing tire thickness to change the relative expansion rate of the tire's outer circumference, thereby adjusting the tire tread.

[0045] The following section uses tire product A as an example to illustrate the tire track improvement and adjustment method in this embodiment:

[0046] After inflating product A, measure its outer circumference using a metal tape measure under standard air pressure. Figure 1 At the highest point of each measuring point on the tire, measure the tire circumference around the tire, marking the following distances: center (X0 at point 0), shoulder (X1 at point 1, X6 at point 6), and the circumference at the three equal divisions from the shoulder to the center (X2 at point 2, X3 at point 3, X4 at point 4, X5 at point 5). Record each measurement value. In an uninflated state, these values ​​are X... 00 X 10 X 20 X 30 X 40 X 50 X 60 Then the relative expansion rate of points 1, 2, ..., 6 is λ. i =(X i -X i0 ) / (X0-X 00 ), where i is 1, 2, ..., 6.

[0047] Product A was subjected to a tire imprint test using a comprehensive strength testing machine, and the imprint shape factor α was obtained. i =L i / L0, such as Figure 2 As shown, L i Let i be the imprint grounding length corresponding to the equally divided points shown in the previous step, where i is 1, 2, ..., 6.

[0048] Modeling the relative expansion rate of the outer perimeter and the imprint shape coefficient is performed based on two schemes for product A, where scheme 1 and scheme 2 represent two different tire thickness designs. A model is established for the relationship between the inflation outer perimeter expansion rate and the imprint shape coefficient.

[0049] Figure 3(a) shows the models of the relative expansion rate of the outer perimeter of Scheme 1 and Scheme 2, representing the expansion rate of the outer perimeter of the tire at various points; Figure 3(b) shows the models of the imprint shape coefficient of Scheme 1 and Scheme 2, representing the imprint shape coefficient at various points of the tire; Figure 3(c) shows the tire imprints of Scheme 1 and Scheme 2. From the above three figures, it can be seen that the changing trend of the relative expansion rate of the outer perimeter is the same as the changing trend of the imprint shape coefficient. Since the imprint shape coefficient curve represents the imprint shape, the changing trend of the relative expansion rate of the outer perimeter of the tire can be obtained, which to a certain extent reflects the changing trend of the imprint shape.

[0050] In this embodiment, the trend of change refers to the trend of change in the amount of change from one point to another. For example, in Figure 3(a), the change in Scheme 2 from point 1 to point 2 is larger, while the change from point 2 to point 3 is smaller; therefore, the trend of change is decreasing. Similarly, in Figure 3(b), the change in Scheme 2 from point 1 to point 2 is larger, while the change from point 2 to point 3 is smaller, which is the same as the trend described above. The specific quantification is affected by the tire specifications and structure. In summary, there is a certain relationship between the trend of change in the relative expansion rate of the outer circumference and the trend of change in the imprint shape coefficient.

[0051] As can be seen from Figures 3(b) and 3(c), the tire tracks of Scheme 1 and Scheme 2 do not meet the requirements, so the tire tracks of the two schemes need to be adjusted.

[0052] Based on the two schemes of product A, a model of tire thickness design parameters and tire circumference relative expansion rate is established. Specifically, as shown in Figure 4(a), the design thickness and relative expansion rate data of scheme 1 and scheme 2 are shown. Based on the above data, data fitting is performed to obtain the model of tire thickness and relative expansion rate of circumference as shown in Figure 4(b). It can be seen from the figure that the tire thickness is negatively correlated with the relative expansion rate of circumference at the corresponding position.

[0053] As can be seen from the figures, in Scheme 1, the relative expansion rate at positions 2 and 5 is too small. Therefore, the tire thickness at positions 2 and 5 can be increased to reduce the relative expansion rate at these positions, thereby adjusting the outer shape of the tire track and improving the tire track shape. In Scheme 2, the relative expansion rate at positions 2 and 5 is too large. Therefore, the tire thickness at these positions can be decreased to increase the relative expansion rate at these positions, thereby adjusting the outer shape of the tire track and improving the tire track shape. The tire track shapes before and after the improvement in Scheme 2 are shown in Figures 5(a) and 5(b). As can be seen from the figures, the depressions at positions A and B of the tire track are effectively improved.

[0054] In this embodiment, the adjustment amount of tire thickness needs to be specifically determined based on the established tire thickness design parameters and the model of the relative expansion rate of the tire's outer perimeter.

[0055] The tire imprint improvement and adjustment method provided in this embodiment can digitize the tire imprint when improving it, and adjust the tire thickness through detailed data to improve the imprint, which is accurate, improves work efficiency, and forms quantifiable indicators.

[0056] Example 2

[0057] In a typical embodiment of the present invention, a tire track improvement and adjustment system is provided, comprising:

[0058] The module for obtaining the relative expansion rate of the outer perimeter is configured to: obtain the tire imprint, obtain the imprint shape coefficient, and determine whether the imprint shape meets the requirements;

[0059] The imprint shape coefficient acquisition module is configured to: acquire the tire imprint, obtain the imprint shape coefficient, and determine whether the imprint shape meets the requirements;

[0060] The imprint shape quantization module is configured to: if the requirements are not met, model the relative expansion rate of the outer perimeter and the imprint shape coefficient, and quantify the imprint shape;

[0061] The tire imprint improvement and adjustment module is configured to: establish a model of the relative expansion rate of tire thickness and outer perimeter, obtain the relationship between tire thickness and relative expansion rate of outer perimeter, and improve tire imprint by adjusting tire thickness.

[0062] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A method for improving and adjusting tire tracks, characterized in that, Includes the following steps: Step 1: Obtain the outer circumference of the tire before and after inflation to obtain the relative expansion rate of the tire's outer circumference; the outer circumference includes the circumference at the center of the tread, the tire circumference at the shoulder, and the circumference at the point where the tread center divides into three equal parts from the shoulder; the relative expansion rate of the outer circumference is calculated according to the following formula: λ i =(X i -X i0 ) / (X0-X 00 ) In the formula, λ i Let X be the relative expansion rate of the outer perimeter at point i. i X is the circumference of the inflated tire. i0 Let Xi be the circumference of the uninflated tire at point i, and X0 be the circumference of the inflated tire at the center. 00 The tire circumference before inflation is located at the center of the tire; i is 1, 2, ..., 6, indicating the location where the outer circumference is measured; Step 2: Obtain the tire tracks, obtain the track shape coefficient, and determine whether the track shape meets the requirements; The imprint shape coefficient is calculated using the following formula: a i =L i / L0 In the formula, α i Let L be the imprint shape coefficient at point i. i L1 is the grounding length of the imprint at point i, and L0 is the grounding length of the imprint at the center of the tire. Step 3: If the requirements are not met, model the relative expansion rate of the outer perimeter and the imprint shape coefficient, and quantify the imprint shape; determine whether the imprint shape meets the requirements, including: whether the outer perimeter shape of the imprint is circular or square. If so, the tire imprint shape meets the requirements and no imprint improvement or adjustment is needed. If not, the tire imprint shape does not meet the requirements and imprint improvement or adjustment is needed. Step 4: Establish a model of the relative expansion rate of tire thickness and outer perimeter to obtain the relationship between tire thickness and relative expansion rate of outer perimeter. By adjusting the tire thickness, the relative expansion rate of tire outer perimeter is changed, thereby improving the tire track.

2. The tire track improvement and adjustment method as described in claim 1, characterized in that, In step two, a comprehensive strength testing machine is used to test the tire's imprint to obtain the tire imprint.

3. The tire track improvement and adjustment method as described in claim 1, characterized in that, In step three, the relative expansion rate of the outer perimeter and the imprint shape coefficient are modeled, and the imprint shape is quantified, including: determining the relationship between the relative expansion rate of the tire outer perimeter and the imprint shape coefficient, and obtaining that the change trend of the relative expansion rate of the tire outer perimeter can reflect the change trend of the imprint shape.

4. The tire track improvement and adjustment method as described in claim 1, characterized in that, Step four involves establishing a model of the relative expansion rate of tire thickness and outer perimeter, including: obtaining the thickness and relative expansion rate of the tire at different locations in two different design schemes, fitting the thickness and relative expansion rate to obtain a model of the relative expansion rate of tire thickness and outer perimeter.

5. The tire track improvement and adjustment method as described in claim 4, characterized in that, The relationship between tire thickness and the relative expansion rate of its outer perimeter is negative.

6. The tire track improvement and adjustment method as described in claim 5, characterized in that, The tire footprint can be improved by adjusting the tire thickness, including adjusting the tire thickness at locations that do not meet the requirements, and by increasing or decreasing the tire thickness to reduce or increase the relative expansion rate of the tire's outer perimeter, thereby adjusting the outer shape of the tire footprint.

7. A tire track improvement and adjustment system, characterized in that, include: The module for obtaining the relative expansion rate of the outer perimeter is configured to: obtain the outer perimeter of the tire before and after inflation, and obtain the relative expansion rate of the outer perimeter of the tire; The outer perimeter includes the circumference at the center of the tread, the tire circumference at the shoulder, and the circumference at the point where the tread center is divided into thirds from the shoulder; the relative expansion rate of the outer perimeter is calculated according to the following formula: λ i =(X i -X i0 ) / (X0-X 00 ) In the formula, λ i Let X be the relative expansion rate of the outer perimeter at point i. i X is the circumference of the inflated tire. i0 Let Xi be the circumference of the uninflated tire at point i, and X0 be the circumference of the inflated tire at the center. 00 The tire circumference before inflation is located at the center of the tire; i is 1, 2, ..., 6, indicating the location where the outer circumference is measured; The imprint shape coefficient acquisition module is configured to: acquire the tire imprint, obtain the imprint shape coefficient, and determine whether the imprint shape meets the requirements; the imprint shape coefficient is calculated using the following formula: a i =L i / L0 In the formula, α i Let L be the imprint shape coefficient at point i. i L1 is the grounding length of the imprint at point i, and L0 is the grounding length of the imprint at the center of the tire. The imprint shape quantization module is configured to: if it does not meet the requirements, establish a quantization model based on the relative expansion rate of the outer perimeter and the imprint shape coefficient; determine whether the imprint shape meets the requirements, including: determining whether the outer perimeter shape of the imprint is circular or square. If so, the tire imprint shape meets the requirements and no imprint improvement or adjustment is needed. If not, the tire imprint shape does not meet the requirements and imprint improvement or adjustment is needed. The tire imprint improvement and adjustment module is configured to: establish a model of the relative expansion rate of tire thickness and outer perimeter, obtain the relationship between tire thickness and relative expansion rate of outer perimeter, and improve tire imprint by adjusting tire thickness to change the relative expansion rate of tire outer perimeter.

Images