A molding method, device and computer program product for optimizing tire blank RRO out-of-roundness

Abstract

The present invention relates to the field of tire manufacturing technology, and more particularly to a tire forming method, apparatus, and computer program product for optimizing the rounded reciprocating (RRO) out-of-roundness (RRO) of a green tire. The method comprises the following steps: 1) setting multiple apex positioning angles between 0 and 360 degrees in the forming machine product parameter column; 2) conducting a building drum and steel apex combination test at each angle, measuring the RRO out-of-roundness of 15 to 30 green tires, and taking the average value; 3) comparing the data to determine the minimum RRO out-of-roundness when the positioning angle is angle A; and 4) rotating the building drum by angle A, then combining the building drum with the steel apex. The present invention uses online RRO out-of-roundness data to adjust the angle between the building drum and the steel apex, effectively preventing the overlap of the high points of the building drum and the steel apex, thereby improving the overall quality of the tire.

Description

Technical Field

[0001] The present invention relates to the technical field of tire manufacturing, and in particular to a molding method, equipment and computer program product for optimizing the RRO out-of-roundness of a tire blank. Background Art

[0002] The RRO out-of-roundness of a green tire is positively correlated with the RFV of the finished tire. Adjusting the RRO out-of-roundness can control the RFV. However, in actual production, the weight of the building drum itself affects its levelness. If the high point of the steel apex composite bead ring overlaps with the high point of the building drum, this will affect the RRO out-of-roundness of the green tire. Therefore, how to minimize the impact of the building drum and the steel apex composite bead combination, reduce the RRO out-of-roundness, and find the optimal angle between the two to improve the overall quality of the tire has become a key challenge in current technological research and development. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a forming method for optimizing the RRO out-of-roundness of a tire blank. This method adjusts the buckle ring angle of the forming drum and the steel apex rubber composite bead through online RRO out-of-roundness detection data, so as to effectively solve the overlap of the high points of the forming drum and the steel apex rubber composite bead, thereby improving the RRO out-of-roundness of the tire blank and improving the overall quality of the tire.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] A forming method for optimizing the RRO out-of-roundness of a tire blank comprises the following steps:

[0006] 1) The steel wire apex rubber composite tire bead is moved to the buckle ring position;

[0007] 2) The forming drum rotates at angle A;

[0008] The angle A is obtained by the following method:

[0009] 2.1) Set the steel apex composite bead positioning angle in the molding machine product parameter column to multiple angles between 0-360°;

[0010] 2.2) Conduct a combination test of the building drum and steel apex rubber composite tire bead at each angle, measure the RRO out-of-roundness of 15-30 tire blanks, and take the average value;

[0011] 2.3) Through data comparison, the RRO out-of-roundness value is the smallest, and the selected positioning angle is angle A;

[0012] 3) The forming drum is combined with the steel wire apex rubber composite tire bead.

[0013] Preferably, the angle setting in step 2.1) is to evenly set 4-8 angles between 0-360°.

[0014] Preferably, the angles set in step 2.1) are 0, 90, 180 and 270 degrees.

[0015] Preferably, in step 2.2), the RRO out-of-roundness of the tire blank is measured by laser ranging. After the tire blank is formed and rolled, it is rotated one circle, and data of one point is measured every degree. A total of 360 data are measured in one circle. The maximum value minus the minimum value is the RRO out-of-roundness data of the tire blank.

[0016] Preferably, in step 2.2), the RRO out-of-roundness of 20 tire blanks is measured.

[0017] Furthermore, the present invention also discloses a computer device, comprising a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the method.

[0018] Furthermore, the present invention also discloses a computer-readable storage medium having a computer program or instruction stored thereon, which implements the method when the computer program or instruction is executed by a processor.

[0019] Furthermore, the present invention also discloses a computer program product, comprising a computer program or instructions, which implement the method when executed by a processor.

[0020] Compared with the existing technology, the present invention has the following outstanding advantages: the present invention uses the RRO out-of-roundness online detection data to adjust the buckle ring angle of the building drum and the steel apex rubber composite bead, so as to effectively solve the problem of high point overlap between the building drum and the steel apex rubber composite bead, improve the RRO out-of-roundness of the tire embryo, and thus improve the overall quality of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a real-time data diagram of the RRO out-of-roundness online detection of the present invention;

[0022] Figure 2 This is a diagram showing the use of the angle adjustment of the forming drum and the steel apex rubber composite tire bead of the present invention;

[0023] Figure 3 This is an operation page diagram for adjusting the angle of the building drum and the steel wire apex rubber composite tire bead of the present invention;

[0024] Figure 4-Figure 7 The RRO curves are 0, 90, 180, and 270 degrees. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings: This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method is given, but the protection scope of the present invention is not limited to the following embodiments.

[0026] A method for adjusting the combination angle of a building drum and a steel apex composite tire bead core is disclosed. Before the building drum and the steel apex composite tire bead are combined, the angle between the two is adjusted, and the optimal combination angle between the two is determined based on RRO out-of-roundness online detection data.

[0027] Among them, the combination angle of the forming drum and the steel wire apex rubber composite tire bead has the following process:

[0028] (1) The steel wire apex rubber composite tire bead is moved to the buckle ring position;

[0029] (2) The forming drum rotates at an angle;

[0030] (3) The forming drum and the steel wire apex rubber composite tire bead are combined;

[0031] In addition, the specific operation of angle adjustment in the forming drum operation page of the forming machine is as follows: the apex core positioning angle in the product parameter column is set to 0, 90, 180, and 270 degrees respectively, the specification 205 / 60R16 A-107 is selected, the forming machine 8#, and the solution is as shown in Table 1.

[0032] Table 1

[0033] Positioning angle 0 degrees 90 degrees 180 degrees 270 degrees Number of samples 20 articles 20 articles 20 articles 20 articles

[0034] According to the scheme in Table 1, 20 RRO data of the embryo are measured at each angle and the average value is taken. The specific data are shown in Table 2. The RRO curve of each angle is shown in Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 .

[0035] Table 2

[0036] Positioning angle 0 degrees 90 degrees 180 degrees 270 degrees RRO mean 0.83mm 0.77mm 1.00mm 0.65mm

[0037] Through data comparison, when the positioning angle is 270 degrees, the RRO out-of-roundness value is the smallest, that is to say, the optimal angle of the combination of the building drum and the steel wire apex rubber composite tire bead of the 8# building machine for this specification is 270 degrees.

[0038] The combination angle of the forming drum and the steel apex rubber composite tire bead is 270 degrees for fixed batch production. The RRO out-of-roundness data are shown in Table 3.

[0039] Table 3

[0040] Positioning angle 0 degrees 270 degrees Production quantity 514 639 RRO mean 0.79mm 0.58mm

[0041] The above is a description of the embodiments of the present invention. The above description of the disclosed embodiments will enable professionals in the field to implement or use the present invention. Various modifications to these embodiments will be apparent to professionals in the field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A forming method for optimizing the RRO out-of-roundness of a tire blank, characterized in that: The method comprises the following steps: 1) The steel wire apex rubber composite tire bead is moved to the buckle ring position; 2) The forming drum rotates according to angle A; The angle A is obtained by the following method: 2.1) Set the steel apex composite bead positioning angle in the molding machine product parameter column to multiple angles between 0-360°; 2.2) Conduct a combined test of the building drum and steel apex rubber composite tire bead at each angle, measure the RRO out-of-roundness of 15-30 tire blanks, and take the average value; 2.3) Through data comparison, the RRO out-of-roundness value is the smallest, and the selected positioning angle is angle A; 3) The forming drum is combined with the steel wire apex rubber composite tire bead.

2. The method for optimizing the RRO out-of-roundness of a tire blank according to claim 1, characterized in that: Step 2.1) Set the angle to 4-8 angles evenly spaced between 0-360°.

3. The method for optimizing the RRO out-of-roundness of a tire blank according to claim 2, characterized in that: Step 2.1) Set the angles to 0, 90, 180, and 270 degrees.

4. The method for optimizing the RRO out-of-roundness of a tire blank according to claim 1, wherein: Step 2.2) The RRO out-of-roundness of the tire blank is measured by laser ranging. After the tire blank is formed and rolled, it is rotated one circle. The data of one point is measured every degree. A total of 360 data points are measured in one circle. The maximum value minus the minimum value is the RRO out-of-roundness data of the tire blank.

5. The method for optimizing the RRO out-of-roundness of a tire blank according to claim 1, characterized in that: Step 2.2) Measure the RRO out-of-roundness of 20 tire blanks.

6. A computer device comprising a memory, a processor, and a computer program stored in the memory, wherein: The processor executes the computer program to implement the method according to any one of claims 1 to 5.

7. A computer-readable storage medium having a computer program or instruction stored thereon, characterized in that: When the computer program or instruction is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

8. A computer program product comprising a computer program or instructions, characterized in that When the computer program or instruction is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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