CN113465948B - Method for testing scratch resistance of car tire - Google Patents
Method for testing scratch resistance of car tire Download PDFInfo
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- CN113465948B CN113465948B CN202110729776.7A CN202110729776A CN113465948B CN 113465948 B CN113465948 B CN 113465948B CN 202110729776 A CN202110729776 A CN 202110729776A CN 113465948 B CN113465948 B CN 113465948B
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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Abstract
The invention relates to the technical field of scratch resistance testing methods, and discloses a method for testing scratch resistance of a car tire, which comprises the following steps: s1, preparing a test tire, namely preparing the test tire: removing the tread exhaust rubber whisker and the mold seam rubber edge, and mounting the tire in a standard specification; II, tire load: the load of the front axle tire should reach 50% -70% of the test load capacity, and the load difference of two tires on the same axle is not more than 10%; III, tire inflation pressure: checking the inflation pressure of the tire at the ambient temperature before the test, wherein the standard type load tire test air pressure is 250kPa, and the enhanced type load tire inflation pressure is 290kPa; s2, mounting I of the test equipment, selecting a standard test vehicle, and mounting the tire selected in the S1 on the standard test vehicle. The invention provides a method for testing the scratch resistance of a car tire, which has the advantages of truly simulating the actual driving scratch situation, and testing truly and conveniently.
Description
Technical Field
The invention relates to the technical field of scratch resistance testing methods, in particular to a method for testing scratch resistance of a car tire.
Background
With the continuous development of society, the requirements of people on the safety of transportation are gradually improved, a car is already driven into thousands of households, the scratch resistance of car tires is an important index in the running process, and the car tire plays a role in stabilizing the safe running.
The abrasion resistance of the car tire is required to be subjected to continuous test to adjust the production process, so that a method for testing the scratch resistance of the car tire is provided.
Disclosure of Invention
Object of the invention
In order to solve the technical problems in the background technology, the invention provides a method for testing the scratch resistance of a car tire, which has the advantages of truly simulating the actual driving scratch situation, and testing truly and conveniently.
(II) technical scheme
In order to solve the problems, the invention provides a method for testing the scratch resistance of a car tire, which comprises the following steps:
s1, preparation of test tire
I, preparation of test tires: removing the tread exhaust rubber whisker and the mold seam rubber edge, and mounting the tire in a standard specification;
II, tire load: the load of the front axle tire should reach 50% -70% of the test load capacity, and the load difference of two tires on the same axle is not more than 10%;
III, tire inflation pressure: checking the inflation pressure of the tire at the ambient temperature before the test, wherein the standard type load tire test air pressure is 250kPa, and the enhanced type load tire inflation pressure is 290kPa;
s2, mounting test equipment
I, selecting a standard test vehicle, and mounting the tire selected in the S1 on the standard test vehicle;
II, adopting high-quality finished U-shaped steel, placing the front surface of the U-shaped steel on a test road, and firmly connecting equipment with a road surface by using expansion screws;
s3, testing
Firstly, mounting a test tire on a selected test vehicle, emergency braking in a sufficient open field, collecting an average value of braking distances for 4 times, recording the average value, marking the required length of the test vehicle for braking for 60km/h-0km/h on the scratch-resistant side equipment, and drawing a vehicle tire entering line with 20 degrees of a wheel track and a U-shaped steel edge;
II, controlling the speed of the vehicle, adjusting the steering wheel, releasing the clutch once the test vehicle enters a braking area, and tightly stepping on the brake and keeping the straight line to pass through the test device, wherein in the braking stroke, the tire passes through the U-shaped steel in the state that the test vehicle is not stopped;
III repeating the operation 4 times, checking the appearance each time, measuring the air pressure, passing the braking test 4 times, the tire is tested without air leakage, pattern dropping blocks, tire shoulder and sidewall damage, crack and bulge, judging that the tire is good, if the tire cannot pass the speed of 60km/h-0km/h, repeating the test according to the requirement of 60km/h-0km/h at the speed of 40km/h-0km/h, and judging that the tire passes the test.
Preferably, in S1, the use of a suitable lubricant is allowed for ease of installation, but the use of lubrication is not excessive to prevent slipping of the tyre on the rim; all the tires to be tested are placed under the same environmental condition at room temperature and must not be heated by sunlight
Preferably, in S3, all of the 4 test tires pass through the U-shaped channel steel in the braking stroke, and after each test is completed, test items such as appearance, air pressure, rim, recording speed and the like are checked.
Preferably, in S2, the U-shaped steel installed on the test path should not shake, loosen, shift, or the like.
Preferably, in S2, to facilitate the installation of the tyre, a suitable lubricant is allowed to be used, the lubrication should not be excessive, all the tyres to be tested that are equipped should be placed under the same environmental conditions, at room temperature, and must not be heated by sunlight.
Preferably, in S2, no leak is a decrease of not more than 10% of the rated air pressure.
Preferably, the standard test vehicle is provided with a speed and distance sensor capable of meeting test requirements, and the speed of the standard test vehicle is measured by adopting a non-contact speed measuring instrument; a test vehicle equipped with an ABS system was used.
Preferably, the deviation between the actual vehicle speed and the standard vehicle speed during the test is displayed in the test vehicle, so that a driver can adjust the vehicle speed in time; test allowed error: vehicle speed: taking the larger value from the speed of +/-1% or +/-0.5 km/h; distance: + -0.1 m.
Preferably, the test rule: pass the scratch test for 4 times of 60km/h-0km/h, which is excellent; pass the scratch test for 4 times of 40km/h-0km/h, pass the scratch test for qualification, fail the scratch test or wait to improve if the scratch test fails.
Preferably, the U-shaped channel steel has the height of 50mm and the width of 100mm.
The technical scheme of the invention has the following beneficial technical effects:
the device has the advantages of truly simulating actual driving scraping situation, and truly and conveniently testing.
Drawings
Fig. 1 is a flow chart of a method for testing scratch resistance of a car tire.
Detailed Description
The present invention will be further described in detail with reference to the accompanying drawings, in which the present invention is described in detail, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
A method for testing scratch resistance of a car tire comprises the following steps:
s1, preparation of test tire
I, preparation of test tires: removing the tread exhaust rubber whisker and the mold seam rubber edge, and mounting the tire in a standard specification;
II, tire load: the load of the front axle tire should reach 50% -70% of the test load capacity, and the load difference of two tires on the same axle is not more than 10%;
III, tire inflation pressure: checking the inflation pressure of the tire at the ambient temperature before the test, wherein the standard type load tire test air pressure is 250kPa, and the enhanced type load tire inflation pressure is 290kPa;
s2, mounting test equipment
I, selecting a standard test vehicle, and mounting the tire selected in the S1 on the standard test vehicle;
II, adopting high-quality finished U-shaped steel, placing the front surface of the U-shaped steel on a test road, and firmly connecting equipment with a road surface by using expansion screws;
s3, testing
Firstly, mounting a test tire on a selected test vehicle, emergency braking in a sufficient open field, collecting an average value of braking distances for 4 times, recording the average value, marking the required length of the test vehicle for braking for 60km/h-0km/h on the scratch-resistant side equipment, and drawing a vehicle tire entering line with 20 degrees of a wheel track and a U-shaped steel edge;
II, controlling the speed of the vehicle, adjusting the steering wheel, releasing the clutch once the test vehicle enters a braking area, and tightly stepping on the brake and keeping the straight line to pass through the test device, wherein in the braking stroke, the tire passes through the U-shaped steel in the state that the test vehicle is not stopped;
III repeating the operation 4 times, checking the appearance each time, measuring the air pressure, passing the braking test 4 times, the tire is tested without air leakage, pattern dropping blocks, tire shoulder and sidewall damage, crack and bulge, judging that the tire is good, if the tire cannot pass the speed of 60km/h-0km/h, repeating the test according to the requirement of 60km/h-0km/h at the speed of 40km/h-0km/h, and judging that the tire passes the test.
In an alternative embodiment, in S1, the use of a suitable lubricant is allowed for ease of installation, but the use of lubrication is not excessive to prevent slipping of the tyre on the rim; all the tires to be tested are placed under the same environmental condition at room temperature and must not be heated by sunlight
In an alternative embodiment, in S3, 4 test tires are all passed through the U-channel during the braking stroke, and after each test, the appearance, air pressure, rim, recording speed, etc. test items are checked.
In an alternative embodiment, in S2, the U-section steel installed on the test path should not shake, loosen, shift, etc.
In an alternative embodiment, in S2, to facilitate the installation of the tyre, a suitable lubricant is allowed to be used, the lubrication should not be excessive, all the tyres to be tested that are equipped should be placed under the same environmental conditions, at room temperature, and have to be warmed up by sunlight.
In an alternative embodiment, in S2, no leak is a decrease of no more than 10% of the nominal gas pressure.
In an alternative embodiment, the standard test vehicle is provided with speed and distance sensors which can meet test requirements, and the speed of the standard test vehicle is measured by adopting a non-contact speed measuring instrument; a test vehicle equipped with an ABS system was used.
In an alternative embodiment, the deviation of the actual vehicle speed from the standard vehicle speed during the test should be displayed in the test vehicle so that the driver can adjust the vehicle speed in time; test allowed error: vehicle speed: taking the larger value from the speed of +/-1% or +/-0.5 km/h; distance: + -0.1 m.
In an alternative embodiment, the test rules: pass the scratch test for 4 times of 60km/h-0km/h, which is excellent; pass the scratch test for 4 times of 40km/h-0km/h, pass the scratch test for qualification, fail the scratch test or wait to improve if the scratch test fails.
In an alternative embodiment, the U-shaped channel has a height of 50mm and a width of 100mm.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (10)
1. The method for testing the scratch resistance of the car tire is characterized by comprising the following steps of:
s1, preparation of test tire
I, preparation of test tires: removing the tread exhaust rubber whisker and the mold seam rubber edge;
II, tire load: the load of the front axle tire should reach 50% -70% of the test load capacity, and the load difference of two tires on the same axle is not more than 10%;
III, tire inflation pressure: checking the inflation pressure of the tire at the ambient temperature before the test, wherein the standard type load tire test air pressure is 250kPa, and the enhanced type load tire inflation pressure is 290kPa;
s2, mounting test equipment
I, selecting a standard test vehicle, and mounting the tire selected in the S1 on the standard test vehicle;
II, adopting high-quality finished U-shaped steel, placing the front surface of the U-shaped steel on a test road, and firmly connecting equipment with a road surface by using expansion screws;
s3, testing
Firstly, mounting a test tire on a selected test vehicle, emergency braking in a sufficient open field, collecting an average value of braking distances for 4 times, recording the average value, marking the required length of the test vehicle for braking for 60km/h-0km/h on the scratch-resistant side equipment, and drawing a vehicle tire entering line with 20 degrees of a wheel track and a U-shaped steel edge;
II, controlling the speed of the vehicle, adjusting the steering wheel, releasing the clutch once the test vehicle enters a braking area, and tightly stepping on the brake and keeping the straight line to pass through the test device, wherein in the braking stroke, the tire passes through the U-shaped steel in the state that the test vehicle is not stopped;
III repeating the operation 4 times, checking the appearance each time, measuring the air pressure, passing the braking test 4 times, the tire is tested without air leakage, pattern dropping blocks, tire shoulder and sidewall damage, crack and bulge, judging that the tire is good, if the tire cannot pass the speed of 60km/h-0km/h, repeating the test according to the requirement of 60km/h-0km/h at the speed of 40km/h-0km/h, and judging that the tire passes the test.
2. The method for testing the scratch resistance of a car tire according to claim 1, wherein: in S1, the use of a suitable lubricant is allowed for ease of installation, but the use of lubrication cannot be excessive to prevent slipping of the tyre on the rim; all the equipped tires to be tested should be placed under the same environmental conditions, at room temperature, and should not be heated by sunlight.
3. The method for testing the scratch resistance of a car tire according to claim 1, wherein: in S3, 4 test tires completely pass through the U-shaped channel steel in the braking stroke, appearance, air pressure and rims are checked after each test is finished, and speed test matters are recorded.
4. The method for testing the scratch resistance of a car tire according to claim 1, wherein: in S2, the U-shaped steel installed on the test road should not shake, loosen and shift.
5. The method for testing the scratch resistance of a car tire according to claim 1, wherein: in S2, to facilitate the installation of the tyre, a suitable lubricant is allowed, the use of which cannot be excessive, all the tyres to be tested that are equipped should be placed under the same environmental conditions, at room temperature, and have to be warmed up by the sun.
6. The method for testing the scratch resistance of a car tire according to claim 1, wherein: in S2, no leak is detected as a decrease of not more than 10% of the rated air pressure.
7. The method for testing the scratch resistance of a car tire according to claim 1, wherein: the standard test vehicle is provided with a speed and distance sensor which can meet the test requirement, and the speed of the standard test vehicle is measured by adopting a non-contact speed measuring instrument; a test vehicle equipped with an ABS system was used.
8. The method for testing the scratch resistance of a car tire according to claim 1, wherein: the deviation between the actual vehicle speed and the standard vehicle speed during the test is displayed in the test vehicle, so that a driver can adjust the vehicle speed in time; test allowed error: vehicle speed: taking the larger value from the speed of +/-1% or +/-0.5 km/h; distance: + -0.1 m.
9. The method for testing the scratch resistance of a car tire according to claim 1, wherein: test rules: pass the scratch test for 4 times of 60km/h-0km/h, which is excellent; pass the scratch test for 4 times of 40km/h-0km/h, pass the scratch test for qualification, fail the scratch test or wait to improve if the scratch test fails.
10. The method for testing the scratch resistance of a car tire according to claim 1, wherein: the U-shaped channel steel has the height of 50mm and the width of 100mm.
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| CN202110729776.7A CN113465948B (en) | 2021-06-29 | 2021-06-29 | Method for testing scratch resistance of car tire |
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| CN202110729776.7A CN113465948B (en) | 2021-06-29 | 2021-06-29 | Method for testing scratch resistance of car tire |
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| CN113465948B true CN113465948B (en) | 2023-10-20 |
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