CN114486296B - Detection method of full explosion-proof tire - Google Patents
Detection method of full explosion-proof tire Download PDFInfo
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- CN114486296B CN114486296B CN202210099263.7A CN202210099263A CN114486296B CN 114486296 B CN114486296 B CN 114486296B CN 202210099263 A CN202210099263 A CN 202210099263A CN 114486296 B CN114486296 B CN 114486296B
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- 238000001514 detection method Methods 0.000 title abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 82
- 238000000034 method Methods 0.000 claims description 12
- 238000010998 test method Methods 0.000 claims 2
- 238000013461 design Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 description 8
- 238000005457 optimization Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 238000011835 investigation Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tires In General (AREA)
Abstract
The invention discloses a detection method of a full explosion-proof tire, and belongs to the technical field of tire manufacturing. The detection method can effectively judge the supporting performance of the side wall of the tire to provide theoretical data support for the run-flat running of the tire, and ensure the safety and reliability of the product put in the market; the zero-pressure durability of the tire can be effectively judged, the reaction is performed on the tire, the positioning design requirement of the product is met, and the safety and reliability of the product in the market are ensured; the detection efficiency of the product can be improved without a real vehicle test.
Description
Technical Field
The invention relates to the technical field of tire manufacturing, in particular to a detection method of a full explosion-proof tire.
Background
With the rapid development of the tire industry, there is an increasing safety requirement for using tires. Under the state of losing pressure, the traditional tire breaks away from the rim within a few seconds, so that the vehicle loses support balance, and serious threat is brought to driving safety. The run-flat tire can stably travel for a certain mileage under the condition of tire pressure loss, thereby improving the use safety of the tire. The main principle of the self-supporting type run-flat tire is that a part with certain supporting force is arranged at the tire side part, which is called side supporting rubber. Under the condition of tyre deflation, the tyre side is not easy to be folded, the tyre is ensured to maintain a certain sinking amount, and the balanced running of the vehicle body is ensured. Sidewall stiffness is the key to determining the support ability of a tire, and it is primarily determined whether the tire has running ability under a loss of pressure.
The only standard for judging the running tire with the self-supporting capability is that the running tire runs for 1h at the speed of 80km/h in an indoor zero-air pressure state to be qualified, the judgment is not applicable to the structure and the related performance of the full-explosion-proof tire, the indoor judgment has a large difference from the using result of a real vehicle, and the existing judgment means is insufficient for representing the performance of the full-explosion-proof product.
Disclosure of Invention
The invention aims at the technical problems, and provides a method for detecting the full-run-flat tire, which can improve the accuracy of the detection data of the full-run-flat tire.
In order to solve the technical problems, the invention provides a method for detecting a full run-flat tire, which comprises the following steps:
condition 1: setting 50-70km/h of test speed under the zero air pressure state, wherein the test load is 65-80% of the load capacity corresponding to the load index, the test duration is more than or equal to 30min, and if the test load meets the condition that the section height change rate is not more than 20%;
condition 2:
detecting the radial rigidity of the tire under the zero air pressure state, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 60N/mm;
detecting the radial rigidity of the tire under the 50% air pressure state, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 140N/mm;
detecting the radial rigidity of the tire under the condition of 60% of air pressure, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 160N/mm;
detecting radial rigidity of the tire under 100% air pressure, wherein the test load index corresponds to 70% of load capacity, and the rigidity value is more than or equal to 200N/mm;
and simultaneously, at least one of the detection of the radial rigidity of the tire under the conditions of zero pressure, 50% air pressure, 60% air pressure and 100% air pressure in the condition 1 and the condition 2 is satisfied, and the full explosion-proof tire is qualified.
As an optimization, simultaneously satisfy
The test speed in the condition 1 is set to be 60km/h, the test load is 70% of the load capacity corresponding to the load index, and the test duration is 30min;
detecting the radial rigidity of the tire under the zero air pressure state in the condition 2, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 60N/mm;
and the radial rigidity of the tire is detected under the 50% air pressure state, the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 140N/mm;
the full explosion-proof tire is qualified.
As an optimization, the ambient temperature detected in the condition 1 is 35 ℃ ±3℃.
Preferably, the rigidity-tested tire is stored at room temperature for 3 days after curing.
As an optimization, the ambient temperature of the rigidity detection is 25 ℃ ± 2 ℃.
As optimization, the test selects tire quarter points, and the radial stiffness minimum value of the four points is used as a judgment standard.
Compared with the prior art, the invention has the following technical effects:
according to the investigation of the full explosion-proof tire product positioning, the tire can run at the speed of 60km/h for more than 30 minutes under the condition of air deficiency or zero tire pressure, and according to the investigation of the road conditions of the expressway and various areas, the zero air pressure running capability is enough for the vehicle to reach a nearby maintenance station for tire replacement.
1. The support performance of the side wall of the tire can be effectively judged through the limitation of the radial rigidity value, theoretical data support is provided for the run-flat running of the tire, and the safety and reliability of the product put on the market are ensured.
2. The zero-pressure endurance test can effectively judge the zero-pressure endurance of the tire, and the zero-pressure endurance test is reflected on the use of the tire, so that the positioning design requirement of the product is met, and the safety and reliability of the product in the market are ensured.
3. Through the verification of the indoor test, the detection efficiency of the product can be improved without a real vehicle test.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a method for detecting a full-run-flat tire, which can improve the accuracy of the detection data of the full-run-flat tire.
In order that the above-recited objects, features and advantages of the present invention will become more apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof.
The invention provides a method for detecting a full-explosion tire (the full-explosion tire is defined in such a way that a supporting rubber is trapezoid in shape and the thickness of the supporting rubber is 4mm-12 mm), and if the full-explosion tire can run at a speed of 60km/h for more than 60km in real vehicles, the tire is judged to be qualified.
Condition 1: setting a test speed to be 60-80km/h under a zero air pressure state, wherein the test load is 65-80% of the load capacity corresponding to the load index, the test duration is more than or equal to 30min, and if the change rate of the section height under the test load is not more than 20% after the test, the condition 1 is satisfied;
condition 2:
detecting the radial rigidity of the tire under the zero air pressure state, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 60N/mm;
detecting the radial rigidity of the tire under the 50% air pressure state, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 140N/mm;
detecting the radial rigidity of the tire under the condition of 60% of air pressure, wherein the test load index corresponds to 80% of the load capacity, and the rigidity value is more than or equal to 160N/mm;
detecting radial rigidity of the tire under 100% air pressure, wherein the test load index corresponds to 70% of load capacity, and the rigidity value is more than or equal to 200N/mm;
and simultaneously, at least one of the detection of the radial rigidity of the tire under the conditions of zero pressure, 50% air pressure, 60% air pressure and 100% air pressure in the condition 1 and the condition 2 is satisfied, and the full explosion-proof tire is qualified.
Specifically, the ambient temperature detected in the condition 1 is 35 ℃ ±3℃.
Specifically, the rigidity-detected tire is stored at room temperature for 3 days after vulcanization.
Specifically, the ambient temperature for the rigidity test is 25 ℃ + -2 ℃.
Specifically, the test selects tire quarter points, and the radial stiffness minimum value of the quarter points is used as a judgment standard.
The technical solutions provided by the present invention are described in detail below in conjunction with examples for further illustrating the present invention, but they should not be construed as limiting the scope of the present invention.
Example 1
The test speed is set to 70km/h, the test load is 65% of the load capacity corresponding to the load index, the test duration is more than or equal to 30min, the test is completed according to the requirements, the appearance inspection tread and the sidewall are not separated, and the section height change rate under the test load after the appearance inspection of the test tire is not more than 20%.
And simultaneously satisfies the following detection of the radial rigidity of the tire under 3 air pressure states:
detecting the radial rigidity of the tire under the zero air pressure state, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 50N/mm;
detecting the radial rigidity of the tire under the 50% air pressure state, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 140N/mm;
and detecting the radial rigidity of the tire under the condition of 100% air pressure, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 200N/mm.
The tire is qualified.
Example 2
The test speed is set to be 50km/h, the test load is 80% of the load capacity corresponding to the load index, the test duration is more than or equal to 30min, the test is completed according to the requirements, the appearance inspection tread and the sidewall are not separated, and the section height change rate under the test load after the appearance inspection of the test tire is not more than 20%.
And simultaneously satisfies the following 2 tire radial stiffness tests under the air pressure state:
detecting the radial rigidity of the tire under the zero air pressure state, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 50N/mm;
and detecting the radial rigidity of the tire under the condition of 60% of air pressure, wherein the test load index corresponds to 70% of load capacity, and the rigidity value is more than or equal to 160N/mm.
The tire is qualified.
Example 3
The test speed is set to be 60km/h, the test load is 70% of the load capacity corresponding to the load index, the test duration is more than or equal to 30min, the test is completed according to the requirements, the appearance inspection tread and the sidewall are not separated, and the section height change rate under the test load after the appearance inspection of the test tire is not more than 20%.
And simultaneously satisfies the following 2 tire radial stiffness tests under the air pressure state:
detecting the radial rigidity of the tire under the zero air pressure state, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 60N/mm;
and detecting the radial rigidity of the tire under the 50% air pressure state, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 140N/mm.
The tire is qualified.
Example 4
The test speed is set to be 60km/h, the test load is 70% of the load capacity corresponding to the load index, the test duration is less than 30min, the test is completed according to the requirements, the appearance inspection tread and the sidewall are not separated, and the section height change rate under the test load after the appearance inspection of the test tire is 25% or more than 20%.
And detecting the radial rigidity of the tire under the zero air pressure state, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is 59N/mm.
The tire does not have zero-pressure lower support capability, and the zero-pressure durability determination is failed.
In the scheme, the above judging method is subjected to indoor test and actual test, and the results are shown in table 1:
TABLE 1 correlation detection between indoor test and real vehicle use
As can be seen from Table 1, when 60km/h is reached, the indoor zero air pressure durable result of 4 schemes is more than or equal to 30min, the radial rigidity under zero air pressure is more than 70N/mm, the radial rigidity under 50% air pressure is more than 140N/mm, the actual vehicle result reaches 60min, the actual vehicle requirement is met, the method for judging the embodiment 3 is the simplest and the most accurate, and the technical means adopted in the embodiment 3 are preferentially adopted when the method is used specifically.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, modifications will occur to those skilled in the art in light of the teachings of this invention, both in the detailed description and the application scope. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (6)
1. A method of detecting a fully run flat tire, comprising:
condition 1: setting 50-70km/h of test speed under the zero air pressure state, wherein the test load is 65-80% of the load capacity corresponding to the load index, the test duration is more than or equal to 30min, and the change rate of the section height under the test load is not more than 20% after the test;
condition 2:
detecting the radial rigidity of the tire under the zero air pressure state, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 60N/mm;
detecting the radial rigidity of the tire under the 50% air pressure state, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 140N/mm;
detecting the radial rigidity of the tire under the condition of 60% of air pressure, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 160N/mm;
detecting radial rigidity of the tire under 100% air pressure, wherein the test load index corresponds to 70% of load capacity, and the rigidity value is more than or equal to 200N/mm;
simultaneously satisfies:
and detecting the radial rigidity of the tire under the zero air pressure state in the condition 1 and the condition 2, and detecting the radial rigidity of the tire under the air pressure state of at least one of 50% air pressure, 60% air pressure and 100% air pressure in the condition 2, wherein the full explosion-proof tire is qualified.
2. A method for detecting a full run-flat tire according to claim 1, wherein the following conditions are satisfied simultaneously
The test speed in the condition 1 is set to be 60km/h, the test load is 70% of the load capacity corresponding to the load index, and the test duration is 30min;
detecting the radial rigidity of the tire under the zero air pressure state in the condition 2, wherein the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 60N/mm;
and the radial rigidity of the tire is detected under the 50% air pressure state, the test load index corresponds to 70% of the load capacity, and the rigidity value is more than or equal to 140N/mm;
the full explosion-proof tire is qualified.
3. A method for detecting a full run-flat tire according to claim 1 or 2, wherein the ambient temperature detected in condition 1 is 35 ℃ ± 3 ℃.
4. A method of testing a fully run flat tire according to claim 1 or 2, wherein the stiffness tested tire is stored at room temperature for 3 days after curing.
5. A method of testing a fully run flat tire according to claim 4, wherein the stiffness is tested at an ambient temperature of 25 ℃ ± 2 ℃.
6. The method of claim 5, wherein the test selects four points of the tire, and the minimum radial stiffness of the four points is used as a criterion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210099263.7A CN114486296B (en) | 2022-01-27 | 2022-01-27 | Detection method of full explosion-proof tire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210099263.7A CN114486296B (en) | 2022-01-27 | 2022-01-27 | Detection method of full explosion-proof tire |
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| Publication Number | Publication Date |
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| CN114486296A CN114486296A (en) | 2022-05-13 |
| CN114486296B true CN114486296B (en) | 2024-03-01 |
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| CN202210099263.7A Active CN114486296B (en) | 2022-01-27 | 2022-01-27 | Detection method of full explosion-proof tire |
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Citations (6)
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|---|---|---|---|---|
| KR20080079464A (en) * | 2007-02-27 | 2008-09-01 | 금호타이어 주식회사 | A method for testing a run-flat tire |
| WO2010137347A1 (en) * | 2009-05-29 | 2010-12-02 | 株式会社ブリヂストン | Run-flat tire |
| CN110823602A (en) * | 2019-10-31 | 2020-02-21 | 安徽佳通乘用子午线轮胎有限公司 | Method for verifying indoor evaluation of tire life cycle validity degree |
| CN111780994A (en) * | 2020-07-10 | 2020-10-16 | 三角轮胎股份有限公司 | Indoor test method for cutting resistance and puncture resistance of tire |
| CN111929081A (en) * | 2020-07-31 | 2020-11-13 | 济宁齐鲁检测技术有限公司 | Durability test method for tire bead of truck tire |
| CN112590464A (en) * | 2019-10-02 | 2021-04-02 | 韩国轮胎与科技株式会社 | Tire wear measuring device and tire wear measuring method using the same |
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2022
- 2022-01-27 CN CN202210099263.7A patent/CN114486296B/en active Active
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| KR20080079464A (en) * | 2007-02-27 | 2008-09-01 | 금호타이어 주식회사 | A method for testing a run-flat tire |
| WO2010137347A1 (en) * | 2009-05-29 | 2010-12-02 | 株式会社ブリヂストン | Run-flat tire |
| CN112590464A (en) * | 2019-10-02 | 2021-04-02 | 韩国轮胎与科技株式会社 | Tire wear measuring device and tire wear measuring method using the same |
| CN110823602A (en) * | 2019-10-31 | 2020-02-21 | 安徽佳通乘用子午线轮胎有限公司 | Method for verifying indoor evaluation of tire life cycle validity degree |
| CN111780994A (en) * | 2020-07-10 | 2020-10-16 | 三角轮胎股份有限公司 | Indoor test method for cutting resistance and puncture resistance of tire |
| CN111929081A (en) * | 2020-07-31 | 2020-11-13 | 济宁齐鲁检测技术有限公司 | Durability test method for tire bead of truck tire |
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