Method for modeling a finished tire hexagonal bead and computer program product

Abstract

The present application relates to the technical field of tire steel bead simulation modeling, and particularly relates to a tire finished hexagonal steel bead modeling method and computer program product. The method comprises the following steps: 1, establishing the material characteristics of the steel bead; 2, obtaining the data of the number of steel wire layers and the number of roots; 3, calculating the total volume of rubber-coated steel wire V1; 4, obtaining the finished steel bead cross-section rotating volume V2=V1; 5, calculating the distance value between the centers of two steel wires; 6, calculating the width of the bottom edge of the steel bead and determining the coordinates of the two points of the bottom edge; 7, calculating the width of the top edge of the steel bead and the distance between the upper and lower layers of steel wires, and determining the coordinates of the remaining four points and the coordinates of the centers of the steel wires; and 8, drawing the outer contour of the finished steel bead cross-section and the arrangement of each layer of steel wires. The tire finished hexagonal steel bead modeling method adopted by the present application makes the size and mass of the steel bead in the material distribution map design consistent with the finished product, thereby improving the accuracy of the material distribution map design.

Description

Technical Field

[0001] This invention relates to the field of tire wire bead simulation modeling technology, and in particular to a method and computer program product for modeling hexagonal wire bead of finished tires. Background Technology

[0002] Tires are the only part of a vehicle that comes into contact with the road surface, directly affecting the safety of drivers and passengers; therefore, their design is crucial. One important way to demonstrate the results of tire structural design is through a material distribution diagram, which serves as the basis for finite element analysis and construction design.

[0003] The steel bead is a crucial component of a tire, its primary function being to securely adhere the tire to the rim and withstand various external forces acting on the tire during driving. Therefore, the design of the steel bead in the material distribution diagram significantly impacts the accuracy of subsequent finite element analysis and construction design.

[0004] The semi-finished hexagonal wire bead is made of single rubber-coated steel wires arranged closely together in a symmetrical hexagonal cross-section, with gaps between the wires. During the tire molding and vulcanization process, the wire bead is compressed and deformed, and the gaps between the wires are completely filled with the rubber coating material, resulting in a smaller cross-sectional size of the finished wire bead. In traditional material distribution diagram design, the hexagonal wire bead is generally drawn according to the semi-finished product size, which differs significantly from the finished size of the vulcanized tire. This leads to excessively thick material in the bead area of ​​the material distribution diagram, affecting the accuracy of the design.

[0005] The applicant filed a Chinese invention patent application (Publication No.: CN114528608A, Publication Date: 2022-05-24) disclosing a method for creating tire material features. This method includes: 1) dividing the materials needed for the material distribution map into multiple material types, and establishing corresponding records for each material and its parameters in a PDM database; 2) establishing an input interface; 3) querying and recording the corresponding material parameter data; 4) encapsulating the input material parameters into custom features and attaching them to a parameter tree; 5) reading the corresponding material parameters from the material features. This method creates parametric material features in the CATIA software environment, creates material features through CAA secondary development, and integrates material parameters using material features; thereby effectively improving the accuracy of material distribution map design and increasing drafting efficiency. However, this method does not involve a steel wire coil modeling method. Summary of the Invention

[0006] To address the aforementioned technical problems, the present invention aims to provide a method for modeling hexagonal steel wire rings in finished tires. This method ensures that the dimensions and mass of the steel wire rings in the material distribution diagram design are consistent with the finished product, thereby improving the accuracy of the material distribution diagram design.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A method for modeling a hexagonal steel wire ring of a finished tire, the method comprising the following steps:

[0009] Step 1: Based on the input material code, obtain relevant data through PLM to establish the material characteristics of the steel wire ring, which will serve as the data source for subsequent operations;

[0010] Step 2: Based on the material characteristics of the wire coil obtained in Step 1, determine the wire arrangement of the wire coil to obtain the number of wires in each layer, specifically n1 for the first layer and n for the top layer. Top Number of steel wires in the widest layer nMax The number of steel wire layers N above the widest layer 上 The number of steel wire layers N below the widest layer 下 ;

[0011] Step 3: Based on the characteristics of the wire ring material obtained in Step 1, obtain the winding diameter BR, single wire diameter d, and single rubber-coated wire diameter D of the wire ring, and calculate the total volume V1 of the rubber-coated wire in the semi-finished wire ring;

[0012] Step 4: Establish the volume relationship V2 of the finished steel wire coil using variables including the distance between the centers of the two steel wires and the diameter of a single coated steel wire;

[0013] Step 5: Based on the condition that "the volume of the finished steel wire ring cross section around the rotation axis is equal to the total volume of the rubber-coated steel wire of the semi-finished steel wire ring", we obtain V2 = V1, and further solve for the distance between the centers of the two steel wires.

[0014] Step 6: Based on the distance between the centers of the two steel wires obtained in Step 5, calculate the bottom edge width, top edge width, and distance between the upper and lower layers of steel wires of the steel wire ring, and determine the outer contour of the finished steel wire ring cross section and the coordinates of the centers of each steel wire.

[0015] Step 7: Draw the outer contour of the finished steel wire coil cross section and the arrangement of each layer of steel wire.

[0016] Preferably, the cross-section of the finished steel wire ring is a regular and symmetrical rounded hexagon.

[0017] Preferably, the width of the widest layer of the wire coil is not equal to the diameter of a single coated wire multiplied by the number of wires in the widest layer.

[0018] Preferably, in step 3), V1 = 5 × π × π × D × D × ((BR + D / 2) + D × cos(π / 6 × 1 rad) × 10).

[0019] Preferably, the rotation axis in step 5) is the Y-axis.

[0020] Preferably, in step 5), V2 = ((2Rv×(n) Top +n Max -2)+D(1 / tan(60°)+1 / sin(60°)))×(2Rv×N 上 ×sin(60°)+D / 2) / 2–(D×D / 4×(3 / tan(60°)–π / 2)))×2π×(BR+Rv×sin(60°)×(2N 下 +N 上 )+D×3 / 4)+(((2Rv×(n1+n Max -2)+D(1 / tan(60°)+1 / sin(60°)))×(2Rv×N 下 ×sin(60°)+D / 2) / 2-(D×D / 4×(3 / tan(60°)–π / 2)))×2π×(2Rv×N 下 ×sin(60°)+D / 2).

[0021] Preferably, in step 6), the bottom edge width of the wire loop L1 = 4 × Rv + tan(π / 6 × 1 rad) × D, the top edge width of the wire loop L2 = 4 × Rv + tan(π / 6 × 1 rad) × D, and the spacing between the upper and lower layers of wires b = Rv / tan(π / 6 × 1 rad).

[0022] Furthermore, the present invention also discloses a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the method.

[0023] Furthermore, the present invention also discloses a computer-readable storage medium having a computer program or instructions stored thereon, which, when executed by a processor, implements the method.

[0024] Furthermore, the present invention also discloses a computer program product, including a computer program or instructions that, when executed by a processor, implement the method.

[0025] Because the present invention adopts the above-mentioned technical solution and the modeling method of the hexagonal steel wire ring of the finished tire, the size and quality of the steel wire ring in the material distribution map design are consistent with the finished product, thereby improving the accuracy of the material distribution map design. Attached Figure Description

[0026] Figure 1 Flowchart of the method for modeling finished steel wire rings.

[0027] Figure 2 This is a diagram showing the arrangement of wires in a semi-finished steel wire coil.

[0028] Figure 3 This is a drawing showing the outer contour and characteristic dimensions of the finished steel wire coil.

[0029] Figure 4 This is a diagram showing the arrangement of the steel wires in the finished steel wire coil.

[0030] Figure 5 This is a material distribution diagram. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present invention.

[0032] like Figure 1 As shown, a method for modeling a hexagonal steel wire ring of a finished tire includes the following steps:

[0033] Step 1: Based on the input material code, establish the material characteristics of the wire ring (e.g., ...). Figure 5 As shown), it serves as the data source for subsequent operations in this invention (the material characteristics are described in detail in patent CN114528608A);

[0034] Step 2: Obtain the wire arrangement pattern 3+4+3 from the material characteristics, and get the number of wires in each layer (the number of wires in the first layer is n1, the number of wires in the top layer is n). Top Number of steel wires in the widest layer nMax The number of steel wire layers N above the widest layer 上 The number of steel wire layers N below the widest layer 下 ;

[0035] Step 3: Obtain the winding diameter BR, single wire diameter d, and single coated wire diameter D from the material characteristics, and calculate the total volume V1 of the coated wire in the semi-finished wire ring: V1 = 5 × π × π × D × D × ((BR + D / 2) + D × cos(π / 6 × 1 rad) × 10 (e.g., ...) Figure 2 (as shown);

[0036] Step 4: Based on the given condition: "The volume of the finished steel wire ring cross section around the rotation axis is equal to the total volume of the rubber-coated steel wire in the semi-finished steel wire ring", we obtain the volume of the finished steel wire ring cross section around the rotation axis as V2 = V1.

[0037] Step 5: Based on the constraint that "the finished steel wire coil is a regular and symmetrical hexagon," with all six interior angles being 120 degrees, and combining the values ​​obtained in the previous steps, the functional relationship V2 = ((2Rv×(n)) is used. Top +n Max -2)+D(1 / tan(60°)+1 / sin(60°)))×(2Rv×N 上 ×sin(60°)+D / 2) / 2–(D×D / 4×(3 / tan(60°)–π / 2)))×2π×(BR+Rv×sin(60°)×(2N 下 +N 上 )+D×3 / 4)+(((2Rv×(n1+n Max -2)+D(1 / tan(60°)+1 / sin(60°)))×(2Rv×N 下 ×sin(60°)+D / 2) / 2-(D×D / 4×(3 / tan(60°)–π / 2)))×2π×(2Rv×N 下 ×sin(60°)+D / 2), calculate the distance between the centers of the two steel wires, 2Rv;

[0038] Step 6: Based on steps 1-4, calculate the width of the bottom edge of the wire loop L1 = 4 × Rv + tan(π / 6 × 1 rad) × D, and determine the coordinates of points P1 and P2 (e.g., ...). Figure 3 (as shown);

[0039] Step 7: Based on steps 1-4, calculate the width of the top edge of the wire coil L2 = 4 × Rv + tan(π / 6 × 1 rad) × D, the spacing between the upper and lower layers of wires b = Rv / tan(π / 6 × 1 rad), and determine the coordinates of points P3, P4, P5, and P6, as well as the coordinates of the center of each wire (e.g., ...). Figure 3 (as shown);

[0040] Step 8: Draw the outer contour of the finished wire coil cross-section and the arrangement of the wires in each layer (3+4+3, e.g., ...). Figure 4 (As shown).

[0041] The foregoing description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A method for modeling a hexagonal steel wire ring of a finished tire, the method comprising the following steps: Step 1: Based on the input material code, obtain relevant data through PLM to establish the material characteristics of the steel wire ring, which will serve as the data source for subsequent operations; Step 2: Based on the material characteristics of the wire coil obtained in Step 1, determine the wire arrangement of the wire coil to obtain the number of wires in each layer, specifically n1 for the first layer and n for the top layer. Top The number of steel wires in the widest layer, n Max The number of steel wire layers N above the widest layer 上 The number of steel wire layers N below the widest layer 下 ; Step 3: Based on the characteristics of the wire ring material obtained in Step 1, obtain the winding diameter BR, single wire diameter d, and single rubber-coated wire diameter D of the wire ring, and calculate the total volume V1 of the rubber-coated wire in the semi-finished wire ring; Step 4: Establish the volume relationship V2 of the finished steel wire coil using variables including the distance between the centers of the two steel wires and the diameter of a single coated steel wire; Step 5: Based on the condition that "the volume of the finished steel wire ring cross section around the rotation axis is equal to the total volume of the rubber-coated steel wire of the semi-finished steel wire ring", we obtain V2 = V1, and further solve for the distance between the centers of the two steel wires. Step 6: Based on the distance between the centers of the two steel wires obtained in Step 5, calculate the bottom edge width, top edge width, and distance between the upper and lower layers of steel wires of the steel wire ring, and determine the outer contour of the finished steel wire ring cross section and the coordinates of the center of each steel wire. Step 7: Draw the outer contour of the finished steel wire coil cross section and the arrangement of each layer of steel wire.

2. The method for modeling a hexagonal steel wire ring of a finished tire according to claim 1, characterized in that, The finished steel wire ring has a regular and symmetrical rounded hexagonal cross-section.

3. The method for modeling a hexagonal steel wire ring of a finished tire according to claim 1, characterized in that, The width of the widest layer of the wire coil is not equal to the diameter of a single coated wire multiplied by the number of wires in the widest layer.

4. The method for modeling a hexagonal steel wire ring of a finished tire according to claim 1, characterized in that, In step 3) V1=5×π×π×D×D×((BR+D / 2)+D×cos(π / 6×1rad)×10).

5. The method for modeling a hexagonal steel wire ring of a finished tire according to claim 1, characterized in that, The rotation axis mentioned in step 5) is the Y-axis.

6. The method for modeling a hexagonal steel wire ring of a finished tire according to claim 2, characterized in that, In step 5) V2=((2Rv×(n Top +n Max -2)+D(1 / tan(60°)+1 / sin(60°)))×(2Rv×N 上 × sin(60°)+D / 2) / 2–(D×D / 4×(3 / tan(60°)–π / 2)))×2π×(BR+Rv×sin(60°)×(2N 下 +N 上 )+D×3 / 4)+(((2Rv×(n1+n Max -2)+D(1 / tan(60°)+1 / sin(60°)))×(2Rv×N 下 × sin(60°)+D / 2) / 2-(D×D / 4×(3 / tan(60°)–π / 2)))×2π×(2Rv×N 下 × sin(60°) + D / 2).

7. The method for modeling a hexagonal steel wire ring of a finished tire according to claim 1, characterized in that, In step 6), the bottom width of the wire loop L1 = 4 × Rv + tan(π / 6 × 1 rad) × D, and the top width of the wire loop L2 = 4 × Rv + tan(π / 6 × 1 rad) × D. 1rad)×D, the spacing between the upper and lower steel wires b=Rv / tan(π / 6×1rad).

8. A computer device, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the method of any one of claims 1-7.

9. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed by a processor, they implement the method described in any one of claims 1-7.

10. A computer program product, comprising a computer program or instructions, characterized in that, When the computer program or instructions are executed by a processor, they implement the method described in any one of claims 1-7.

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