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A test method for bead durability of truck tires

A test method, the technology of trucks, applied in the direction of automobile tire testing, etc., can solve the problems of not reaching the bead durability, shoulder clearance, etc., to reduce the test cost, avoid damage, and improve the success rate of the test

Active Publication Date: 2021-05-07
济宁齐鲁检测技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventor found that because the tread has not been removed, defects such as shoulder voids are likely to appear when the bead is intact in the actual test using this test method, and the test air pressure and speed are far lower than the actual loading and use on the market. Cannot achieve the purpose of reflecting the real bead durability performance

Method used

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  • A test method for bead durability of truck tires
  • A test method for bead durability of truck tires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A test method for bead durability of truck tires:

[0030] Grind the tread before tire assembly, and grind the tread to the bottom of the tire pattern groove. The grinding accuracy requires a reserved pattern depth of 0.05mm;

[0031] Install the polished test tire on the rim that meets the requirements, fill it with a test air pressure of 1100kPa, and park the test tire at an ambient temperature of 38°C for 3 hours after inflation;

[0032] Carry out the test: the duration of the first stage is 2h, and the pressure is set to the standard load pressure; the second stage runs until the tire is damaged, and the pressure is set to 200% of the standard load pressure, and the speed remains unchanged at 50km / h during the test; the final bead ruptures The running time of the second stage is 96h 30min.

Embodiment 2

[0034] A test method for bead durability of truck tires:

[0035] Grind the tread before tire assembly, and grind the tread to the bottom of the tire pattern groove. The grinding accuracy requires a reserved pattern depth of 0.01mm;

[0036] Install the polished test tire on the measuring rim that meets the regulations, fill it with a test air pressure of 1100kPa, and park the test tire at an ambient temperature of 39°C for 3.2 hours after inflation;

[0037] Carry out the test: the duration of the first stage is 2h, and the pressure is set to the standard load pressure; the second stage runs until the tire is damaged, and the pressure is set to 200% of the standard load pressure, and the speed remains unchanged at 50km / h during the test; the final bead ruptures The running time of the second stage is 97h 50min.

Embodiment 3

[0039] A test method for bead durability of truck tires:

[0040] Grind the tread before tire assembly, and grind the tread to the bottom of the tire pattern groove. The grinding accuracy requires a reserved pattern depth of 0.02mm;

[0041] Install the polished test tire on the measuring rim that meets the regulations, fill it with a test air pressure of 1100kPa, and park the test tire at an ambient temperature of 40°C for 3.5 hours after inflation;

[0042] Carry out the test: the duration of the first stage is 2h, and the pressure is set to the standard load pressure; the second stage runs until the tire is damaged, and the pressure is set to 200% of the standard load pressure, and the speed remains unchanged at 50km / h during the test; the final bead ruptures The running time of the second stage is 96h 49min.

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Abstract

The invention relates to the technical field of bead durability evaluation. By improving the current mainstream bead durability test method, a test method for the bead durability performance of truck tires is provided to simulate the strength of the bead part of the actual tire in use to the greatest extent. In order to improve the authenticity of the bead durability performance of the test response: before the tire is assembled, the tread is ground, and the tread is ground to the bottom of the tire pattern groove. After grinding, the test tire is installed on the measuring rim that meets the regulations, and it is filled with 1100kPa. Test air pressure. After inflation, the test tire should be parked at an ambient temperature of 38°C ± 3°C for no less than 3 hours; test: There are 2 stages of test procedures, the duration of the first stage is 2 hours, and the pressure is set to the standard load pressure; The second stage runs until the tire is damaged, and the pressure is set to 200% of the standard load pressure; the speed remains unchanged at 50km / h during the test.

Description

technical field [0001] The invention relates to the technical field of bead durability evaluation, in particular to a method for testing the bead durability of truck tires. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The bead is the part where the tire is installed on the rim, and is composed of bead core and chafer cloth. Shoulder space is a kind of tire bulge, mainly on the side of the tire; when the heavy-duty tires are overloaded, the contact area of ​​the tire surface increases, the tire shoulder wears faster, the temperature of the carcass is high, and the heat generated cannot be dissipated in time, forming a tire. The shoulder collects heat, causing voiding. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/02
CPCG01M17/02
Inventor 高明陈绪飞丁纪龙王丁徐艳林刘玉峰孔德鲁李建勋
Owner 济宁齐鲁检测技术有限公司
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