Finite element-based tire assembly performance analysis method

Abstract

The invention discloses a tire assembly performance analysis method based on finite elements, and relates to the technical field of tire design, and the method comprises the following steps: S1, building an explosion filling assembly equipment model according to production line assembly equipment parameters; s2, performing explosion filling assembly simulation analysis, and setting explosion filling assembly speed and air pressure according to actual assembly control parameters; and S3, the contact state of the tire and the rim in the tire explosion filling assembly process is monitored. According to the tire assembly performance analysis method based on the finite element, an effective prediction simulation model is established, and a tire and rim assembly performance monitoring and judging method is established through an FORTRAN subprogram, so that designers can pre-judge the tire assembly performance on a production line in advance, analog simulation and pre-judgment are conveniently carried out before tire manufacturing, and the production efficiency is improved. The method has the advantages that the method can greatly reduce the assembly knocking-over probability, the simulation model is arranged, and analysis parameters can be provided for the knocking-over deformation mechanism in the tire assembly process.

Description

Technical Field

[0001] The invention relates to the technical field of tire design, in particular to a tire assembly performance analysis method based on finite elements. Background Art

[0002] The vehicle is connected to the tire axle through the transmission system, which in turn drives the tire to rotate and realize the vehicle driving operation. The tire is one of the important parts of the car and has a great impact on the car's handling and safety performance. The assembly performance of the tire and rim is crucial to the safe operation of the vehicle. If the tire and rim assembly performance is poor, it will not only affect the assembly efficiency of the tire and rim on the production line, but also there will be problems such as heat generation, wear and even debonding caused by rotation during operation, which poses a safety hazard.

[0003] During the production process, the tire and the rim will be assembled under high pressure through an automatic assembly device. After the pressure is reduced and the air is deflated to reach the standard pressure, the assembly is completed and the tire is taken off the line. However, in the actual process, due to problems such as design, manufacturing, and automatic assembly device settings, poor assembly may occur, affecting assembly efficiency. There are problems with machine assembly detection and display during the assembly process, and the causes of poor assembly, influencing factors, and defective rates cannot be deeply analyzed and predicted in advance, resulting in poor practicality.

[0004] Based on this, a tire assembly performance analysis method based on finite elements is now provided, which can eliminate the drawbacks of the existing technical solutions. Summary of the invention

[0005] The purpose of the present invention is to provide a tire assembly performance analysis method based on finite elements to solve the problem in the background art that the causes, influencing factors and defective rates of assembly failures cannot be deeply analyzed and predicted in advance.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A tire assembly performance analysis method based on finite element method comprises the following steps:

[0008] S1. Establish a burst-charging assembly equipment model based on the assembly equipment parameters of the production line;

[0009] S2. Perform explosive charging assembly simulation analysis and set the explosive charging assembly speed and air pressure according to actual assembly control parameters;

[0010] S3, monitoring the contact state between the tire and the rim during the tire inflation assembly process.

[0011] Preferably, the step S1 comprises:

[0012] S11. According to the tire design drawings, organize relevant data and establish a two-dimensional grid model of the tire;

[0013] S12, establishing a three-dimensional analysis model of the tire and exporting the three-dimensional model file.

[0014] Preferably, the step S1 establishes a simulation model of explosive-charging assembly equipment according to the explosive-charging assembly design parameters of the production line, and the simulation model serves as an execution device for the explosive-charging assembly simulation analysis.

[0015] Preferably, the execution device comprises a tire model, a sealing steel plate is provided on the lower surface of the tire model, and an inflation ring is provided on the upper end of the tire model.

[0016] Preferably, the step S11 includes:

[0017] S111, importing a tire design material distribution map into Hypermesh, and dividing components in the tire design material distribution map;

[0018] S112, defining corresponding tire material codes, including rubber material codes and frame material codes, and assigning corresponding mechanical material models to them;

[0019] S113. Material model application: The Yeoh mathematical constitutive model that characterizes the nonlinear mechanical relationship of rubber is used to test the stress-strain relationship through experiments, fit the Yeoh model coefficients, and establish a two-dimensional grid model.

[0020] Preferably, the step S12 obtains the three-dimensional tire analysis model by rotating the two-dimensional tire mesh model file in the step S11, and the export format of the three-dimensional tire analysis model is a three-dimensional model .inp file.

[0021] Preferably, step S2 comprises:

[0022] S21, assemble the inflation ring, tire model, and rim according to the specification assembly parameters;

[0023] S22, moving the inflation ring downward to squeeze the tire model sidewall position, and performing high-pressure inflation operation on the tire model;

[0024] S23. After the high-pressure inflation is completed, the inflation ring is moved upward to return to its original position, and the tire model is depressurized and deflated so that the air pressure can be maintained at the standard air pressure, thereby completing the assembly process.

[0025] Preferably, the explosion-filling assembly simulation analysis process in step S2 adopts an Abaqus explicit dynamics simulation method.

[0026] Preferably, a monitoring node set is provided at the tire mouth, and the monitoring node set is used to monitor the contact state between the tire and the rim during the tire inflation assembly process, and transmit the image to the FORTRAN subroutine based on the above contact state.

[0027] Preferably, the FORTRAN subroutine is used to receive image features and automatically determine whether the tire is well assembled based on the above features, and display the determination result.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] The present invention provides a tire assembly performance analysis method based on finite elements, which not only establishes an effective prediction simulation model, but also establishes a monitoring and judgment method for the tire and rim assembly performance through a FORTRAN subroutine, which helps designers to predict the tire assembly performance on the production line in advance, facilitates simulation and prediction before tire manufacturing, and makes improvements in advance. By applying this method, the probability of assembly unbend can be greatly reduced, and a simulation model is provided to provide analysis parameters for the unbend deformation mechanism during tire assembly. At the same time, the present invention can also observe the assembly status of the tire and the rim in a circumferential circle, analyze the assembly performance of the tire and the rim in advance and assist in improvement, and eliminate safety hazards such as rotation heating and melt unbend during operation caused by poor circumferential assembly of the tire and the rim. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the process of the present invention.

[0031] Figure 2 It is a schematic flow diagram of step 1 of the present invention.

[0032] Figure 3 It is a structural schematic diagram of the tire two-dimensional grid model of the present invention.

[0033] Figure 4 It is a schematic structural diagram of the tire three-dimensional analysis model of the present invention.

[0034] Figure 5 It is a schematic diagram of the process flow of the explosive charging assembly equipment model of the present invention.

[0035] Figure 6 It is a schematic flow chart of step 11 of the present invention.

[0036] Figure 7 It is a schematic diagram of the process of step 2 of the present invention.

[0037] Figure 8 It is a schematic diagram of a well-assembled structure of the present invention.

[0038] Fig. 9 It is a structural schematic diagram of poor assembly of the present invention.

[0039] Notes on reference numerals: tire model 100 , sealing steel plate 200 , inflation ring 300 . DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0041] In this embodiment, if Figure 1-Figure 9 As shown, a tire assembly performance analysis method based on finite elements is introduced on the basis of existing technologies. A finite element simulation method is introduced, and a model is established according to the assembly process on the production line. The assembly process on the assembly line can be simulated, and then the tire assembly performance can be estimated and improved in advance. The method includes the following steps:

[0042] S1. Establish a burst-charging assembly equipment model based on the assembly equipment parameters of the production line;

[0043] S2. Perform explosive charging assembly simulation analysis and set the explosive charging assembly speed and air pressure according to actual assembly control parameters;

[0044] S3, monitoring the contact state between the tire and the rim during the tire inflation assembly process.

[0045] Among them Figure 2 - Figure 4 As shown, the step S1 includes:

[0046] S11. According to the tire design drawings, organize relevant data and establish a two-dimensional grid model of the tire;

[0047] S12, establishing a three-dimensional analysis model of the tire and exporting the three-dimensional model file.

[0048] Among them Figure 1-Figure 5 As shown, step S1 establishes a simulation model of the explosive charging assembly equipment according to the explosive charging assembly design parameters of the production line. The simulation model serves as an execution device for the explosive charging assembly simulation analysis, which is convenient for simulating the assembly process of the production line. By observing the shape changes and parameter changes of the simulation model during the assembly process, the parameter changes can be recorded to facilitate subsequent analysis.

[0049] Among them Figure 5 As shown, the execution device includes a tire model 100, a sealing steel plate 200 is provided on the lower surface of the tire model 100, and an inflation ring 300 is provided on the upper end of the tire model 100. The above structures are designed according to the explosion and filling assembly parameters of the production line to ensure that the execution device is compatible with the tire in the actual application scenario, thereby improving the accuracy of the simulation, facilitating the staff to improve the tire assembly performance according to the analysis results, and being able to make timely adjustments with real-time performance.

[0050] Among them Figure 6 As shown, the step S11 includes:

[0051] S111, importing a tire design material distribution map into Hypermesh, and dividing components in the tire design material distribution map;

[0052] S112, defining corresponding tire material codes, including rubber material codes and frame material codes, and assigning corresponding mechanical material models to them;

[0053] S113. Material model application: The Yeoh mathematical constitutive model that characterizes the nonlinear mechanical relationship of rubber is used to test the stress-strain relationship through experiments, fit the Yeoh model coefficients, and establish a two-dimensional grid model.

[0054] Among them Figure 2 As shown, the step S12 obtains a three-dimensional analysis model of the tire by rotating the two-dimensional mesh model file of the tire in the above step S11. The export format of the three-dimensional analysis model of the tire is a three-dimensional model .inp file. A simulation operation is performed before the tire is manufactured to provide analysis parameters for the bead unseating deformation mechanism during the tire assembly process. Compared with the prior art, this analysis method can not only perform post-testing and result display, but also obtain the actual tire assembly process.

Claims

1. A tire assembly performance analysis method based on finite element, characterized in that: The following steps are involved: S1. Establish a burst-charging assembly equipment model based on the assembly equipment parameters of the production line; S2. Perform explosive charging assembly simulation analysis and set the explosive charging assembly speed and air pressure according to actual assembly control parameters; S3, monitoring the contact state between the tire and the rim during the tire inflation assembly process.

2. The tire assembly performance analysis method based on finite element according to claim 1, characterized in that: The step S1 comprises: S11. According to the tire design drawings, organize relevant data and establish a two-dimensional grid model of the tire; S12, establishing a three-dimensional analysis model of the tire and exporting the three-dimensional model file.

3. The tire assembly performance analysis method based on finite element according to claim 1, characterized in that: The step S1 establishes a simulation model of explosive charging assembly equipment according to the design parameters of the explosive charging assembly of the production line, and the simulation model serves as an execution device for the explosive charging assembly simulation analysis.

4. The tire assembly performance analysis method based on finite element according to claim 3, characterized in that: The execution device comprises a tire model (100), a sealing steel plate (200) is arranged on the lower surface of the tire model (100), and an inflation ring (300) is arranged on the upper end of the tire model (100).

5. The tire assembly performance analysis method based on finite element according to claim 2, characterized in that: The step S11 comprises: S111, importing a tire design material distribution map into Hypermesh, and dividing components in the tire design material distribution map; S112, defining corresponding tire material codes, including rubber material codes and frame material codes, and assigning corresponding mechanical material models to them; S113. Material model application: The Yeoh mathematical constitutive model that characterizes the nonlinear mechanical relationship of rubber is used to test the stress-strain relationship through experiments, fit the Yeoh model coefficients, and establish a two-dimensional grid model.

6. The tire assembly performance analysis method based on finite element according to claim 2, characterized in that: The step S12 obtains a three-dimensional tire analysis model by rotating the two-dimensional tire mesh model file in the step S11. The three-dimensional tire analysis model is exported in a three-dimensional model .inp file format.

7. The tire assembly performance analysis method based on finite element according to claim 4, characterized in that: The step S2 comprises: S21, assembling the inflation ring (300), the tire model (100), and the wheel rim according to the specification assembly parameters; S22, moving the inflation ring (300) downward to squeeze the sidewall of the tire model (100), and performing a high-pressure inflation operation on the tire model (100); S23, after the high-pressure inflation is completed, the inflation ring (300) is moved upward to return to the original position, and the tire model (100) is depressurized and deflated so that the air pressure can be maintained at the standard air pressure, thereby completing the assembly process.

8. The tire assembly performance analysis method based on finite element according to claim 1, characterized in that: The explosive charging assembly simulation analysis process in step S2 adopts the Abaqus explicit dynamics simulation method.

9. The tire assembly performance analysis method based on finite element according to claim 1, characterized in that: A monitoring node set is arranged at the tire mouth, and the monitoring node set is used to monitor the contact state between the tire and the rim during the tire bursting and assembling process, and transmit the image to the FORTRAN subroutine based on the above contact state.

10. The tire assembly performance analysis method based on finite element according to claim 9, characterized in that: The FORTRAN subroutine is used to receive image features and automatically determine whether the tire is well assembled based on the features, and display the determination result.

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