CN-117048257-B - Tire imprinting improvement and adjustment method and system

CN117048257BCN 117048257 BCN117048257 BCN 117048257BCN-117048257-B

Abstract

The invention discloses a tire footprint improvement adjustment method and system, wherein the method comprises the steps of obtaining the outer circumference of a tire before and after inflation to obtain the outer circumference relative expansion rate of the tire, obtaining the footprint of the tire to obtain a footprint shape coefficient, judging whether the footprint shape meets the requirements, if not, modeling the outer circumference relative expansion rate and the footprint shape coefficient, quantifying the footprint shape, establishing a model of the tire thickness and the outer circumference relative expansion rate to obtain the relation between the tire thickness and the outer circumference relative expansion rate, and improving the tire footprint by adjusting the tire thickness.

Inventors

QIU XINXIN
QIN QINGWANG
ZHANG SHUO
MA PENGZHI
HU YUAN
JIN QI
KONG DELU
HAN SONGLIANG
YANG XIANHUA
ZHOU YANYAN
LIU LU

Assignees

山东华勤橡胶科技有限公司
通力轮胎有限公司
华勤橡胶工业集团有限公司

Dates

Publication Date: 20260508
Application Date: 20230821

Claims (7)

1. A method for improving and adjusting tire footprint, comprising the steps of: obtaining the outer perimeter of the tire before and after inflation to obtain the outer perimeter relative expansion rate of the tire, wherein the outer perimeter comprises the perimeter of the tread center, the perimeter of the tire at the tire shoulder and the perimeter of the tread center to the tire shoulder, and the outer perimeter relative expansion rate is calculated according to the following formula: λ i =(X i -X i0 )/(X 0 -X 00 ) Wherein λ i is the outer circumference relative expansion ratio at i, X i is the tire circumference after inflation, X i0 is the tire circumference after inflation at i, X 0 is the tire circumference after inflation at the tire center, X 00 is the tire circumference before inflation at the tire center, i is 1, 2..6, indicating the position of the measured outer circumference; Step two, obtaining the imprinting of the tire to obtain imprinting shape coefficients, and judging whether the imprinting shape meets the requirement; the print form factor is calculated using the following formula: α i =L i /L 0 Where α i is the footprint shape factor at i, L i is the footprint ground length at i, and L 0 is the footprint ground length at the center of the tire; Judging whether the shape of the outer circumference of the imprinting is round or square, if so, the shape of the imprinting of the tire meets the requirements, and the imprinting improvement adjustment is not needed, and if not, the shape of the imprinting of the tire does not meet the requirements, and the imprinting improvement adjustment is needed; and fourthly, establishing a model of the relative expansion rate of the tire thickness and the outer circumference, obtaining the relation between the tire thickness and the relative expansion rate of the outer circumference, and improving the tire footprint by adjusting the tire thickness and changing the relative expansion rate of the outer circumference of the tire.
2. The method for improving and adjusting tire footprint as claimed in claim 1, wherein in the second step, a tire is subjected to footprint test by using a comprehensive strength tester to obtain a tire footprint.
3. The method for improving and adjusting tire footprint according to claim 1, wherein in the third step, modeling is performed on the relative expansion rate of the outer circumference and the footprint shape factor, and the footprint shape is quantified, and the method comprises the steps of judging the relation between the relative expansion rate of the outer circumference of the tire and the footprint shape factor, and obtaining the trend that the change trend of the relative expansion rate of the outer circumference of the tire can be reflected.
4. The method for improving and adjusting tire footprint of claim 1, wherein the step four of modeling the relative expansion ratio of the tire thickness and the outer circumference comprises obtaining the thickness and the relative expansion ratio of the tire at different positions in two different sets of design schemes, and fitting the data of the thickness and the relative expansion ratio to obtain the model of the relative expansion ratio of the tire thickness and the outer circumference.
5. The method of claim 4, wherein the relationship between the tire thickness and the relative expansion rate of the outer circumference is a negative correlation.
6. The method for improving and adjusting a tire footprint as in claim 5, wherein the improvement of the tire footprint by adjusting the tire thickness comprises adjusting the tire thickness at an undesirable location, and adjusting the tire footprint peripheral shape by increasing or decreasing the tire thickness to decrease or increase the relative expansion ratio of the tire peripheral length.
7. A tire footprint improvement adjustment system, comprising: an outer circumference relative expansion rate acquisition module configured to acquire outer circumferences of the tire before and after inflation to obtain an outer circumference relative expansion rate of the tire, wherein the outer circumferences include a circumference at a tread center, a circumference at a tire shoulder, and a circumference at three parts of the tread center to the tire shoulder, and the outer circumference relative expansion rate is calculated according to the following formula: λ i =(X i -X i0 )/(X 0 -X 00 ) Wherein λ i is the outer circumference relative expansion ratio at i, X i is the tire circumference after inflation, X i0 is the tire circumference after inflation at i, X 0 is the tire circumference after inflation at the tire center, X 00 is the tire circumference before inflation at the tire center, i is 1, 2..6, indicating the position of the measured outer circumference; The print shape factor obtaining module is configured to obtain a print shape factor of the tire and judge whether the print shape meets the requirement, wherein the print shape factor is calculated by adopting the following formula: α i =L i /L 0 Where α i is the footprint shape factor at i, L i is the footprint ground length at i, and L 0 is the footprint ground length at the center of the tire; The print shape quantifying module is configured to establish a quantifying model according to the relative expansion rate of the outer perimeter and the print shape coefficient if the print shape is not in accordance with the requirements, and judge whether the print shape is in accordance with the requirements or not, wherein the judging of whether the print outer perimeter shape is round or square or not comprises judging whether the tire print shape is in accordance with the requirements without print improvement adjustment if the print outer perimeter shape is in accordance with the requirements or not, and judging whether the tire print shape is in accordance with the requirements or not if the print outer perimeter shape is not in accordance with the requirements; and the imprinting improvement and adjustment module is configured to build a model of the relative expansion rate of the tire thickness and the outer circumference, obtain the relation between the tire thickness and the relative expansion rate of the outer circumference, and improve the imprinting of the tire by adjusting the tire thickness, changing the relative expansion rate of the outer circumference of the tire.

Description

Tire imprinting improvement and adjustment method and system Technical Field The invention relates to the technical field of tire footprint improvement, in particular to a tire footprint improvement adjustment method and system. Background The all-steel radial tire is an important accessory of a vehicle, the ground contact mark and the pressure distribution of the tire are main influencing factors of the tread abrasion and the rolling resistance of the tire, and the increase of the contact area of the tire and the ground is an effective way for improving the stability of the vehicle, so that in recent years, the performance of a car is improved by adopting a flat tire, namely, a tire with a larger aspect ratio, and increasing the contact area of the tire and the ground. In the prior art, in order to improve the wear performance of a tire tread, a form of changing tread patterns and tread grooves is generally adopted, as in chinese patent No. CN107150557B, a tire is disclosed in which a tread portion is provided with a crown main groove extending continuously in the tire circumferential direction and a shoulder main groove extending continuously in the tire circumferential direction outside the tire axial direction of the crown main groove, the crown main groove is in a zigzag shape formed by a crown long side portion inclined toward one side with respect to the tire circumferential direction and a crown short side portion inclined reversely to the crown long side portion and having a length smaller than the crown long side portion alternately in the tire circumferential direction, and the shoulder main groove is in a zigzag shape formed by a shoulder long side portion inclined toward one side with respect to the tire circumferential direction and a shoulder side portion inclined reversely to the shoulder long side portion and having a length smaller than the shoulder long side portion alternately in the tire circumferential direction, and the wear of the tire is reduced by the above structure. However, the methods for improving the abrasion performance adopted in the prior art cannot realize the targeted improvement on the parts of the tire which are easy to abrade, and at present, some methods for improving the abrasion resistance and the service life of the tire by improving the grounding trace of the tire exist in the prior art, but the methods are completed by virtue of the experience of workers, and the requirement can be met after the trace of the tire is adjusted for many times in the improvement process, so that the working efficiency is reduced, the quality of the finally adjusted tire is uneven, and the standardized adjustment of the tire trace cannot be realized. Disclosure of Invention Aiming at the problems existing in the prior art, the invention provides a tire footprint improvement and adjustment method, which is characterized in that a model specific quantitative data index is established, and then the outer circumference expansion rate of a tire is changed by adjusting the thickness of the tire, so that the aim of improving the tire footprint is finally achieved. The technical scheme of the invention is as follows: in a first aspect of the present invention, there is provided a tire footprint improvement adjustment method comprising the steps of: Step one, obtaining the outer perimeter of the tire before and after inflation, and obtaining the relative expansion rate of the outer perimeter of the tire; Step two, obtaining the imprinting of the tire to obtain imprinting shape coefficients, and judging whether the imprinting shape meets the requirement; Step three, if the relative expansion rate of the peripheral length and the imprinting shape factor do not meet the requirements, establishing a quantization model; and fourthly, establishing a model of the relative expansion rate of the tire thickness and the outer circumference, obtaining the relation between the tire thickness and the relative expansion rate of the outer circumference, and improving the tire footprint by adjusting the tire thickness. In a second aspect of the present invention, there is provided a tire footprint improvement adjustment system comprising: The outer circumference relative expansion rate acquisition module is configured to acquire the outer circumference of the tire before and after inflation to obtain the outer circumference relative expansion rate of the tire; The print shape factor acquisition module is configured to acquire the print of the tire to obtain a print shape factor and judge whether the print shape meets the requirement; the footprint shape quantization module is configured to establish a quantization model for the relative expansion rate of the outer circumference and the footprint shape coefficient if the relative expansion rate of the outer circumference does not meet the requirements; and the imprinting improvement and adjustment module is configured to build a model of the relative expansion