CN113029602B - Precision verification method of high-precision rim for tire high-speed uniformity equipment - Google Patents
Precision verification method of high-precision rim for tire high-speed uniformity equipment Download PDFInfo
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- CN113029602B CN113029602B CN202110225884.0A CN202110225884A CN113029602B CN 113029602 B CN113029602 B CN 113029602B CN 202110225884 A CN202110225884 A CN 202110225884A CN 113029602 B CN113029602 B CN 113029602B
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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
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The invention belongs to the field of rim detection, and particularly relates to a precision verification method of a high-precision rim for high-speed tire uniformity equipment. The method comprises the following steps: 1. checking the dimensional accuracy of the rim; 2. checking the static unbalance of the wheel rim; 3. selecting a verification tyre; 4. checking the tightness of the rim and tire assembly; 5. and (5) checking the fitting degree of the tire and rim assembly. The invention ensures the rim precision and reduces errors, thereby ensuring that the measured data reflects the real uniformity of the tire.
Description
Technical Field
The invention belongs to the field of rim detection, and particularly relates to a precision verification method of a high-precision rim for high-speed tire uniformity equipment.
Background
Vehicle vibration is mainly caused by road surface irregularities. With the improvement of the riding comfort and the quietness of the automobile, the road smoothness is improved, the diameter of wheels is reduced, the tire is flattened and the weight is reduced, the elastic automobile body is put into use, and the automobile vibration and the noise caused by the uniformity of the tire attract attention.
Tires, which are products in which a plurality of raw materials are laminated, inevitably have a phenomenon of unevenness in size, rigidity, and mass during the manufacturing process. Such non-uniformity will generate periodic excitation forces during high-speed rotation of the tire, which not only adversely affect the tire life and handling stability of the entire vehicle, but also is an important factor in inducing tire noise. Therefore, the control of the tire uniformity is an important link in the control of the tire production quality.
Tire enterprises mainly improve the uniformity of tires by controlling the dimensional uniformity of semi-finished tires, the precision of a forming machine, the size and distribution of joints of various materials in forming, the precision of a vulcanizing machine, inflation after vulcanization and the like. The tire uniformity includes three aspects of size, mass and stiffness. The uniformity of the quality is detected by a dynamic balancing machine and eliminated by a counterweight mode. The uniformity of size and rigidity is detected by uniformity detection equipment, which can be classified into low-speed uniformity detection and high-speed uniformity detection. Low-speed uniformity detection equipment is mostly adopted by various domestic large tire production enterprises and tire quality detection mechanisms. For analyzing the high-speed noise and vibration of the tire, high-speed uniformity testing equipment is mostly adopted for detection and analysis.
However, in the wheel system, not only the tire non-uniformity causes the vibration of the automobile, but also the influence of the rim non-uniformity on the vibration of the automobile cannot be ignored. The wheel is the main part of the vehicle, and is also the main bearing part of the vehicle, and the quality of the wheel directly influences the safety, stability, smoothness and economy of the vehicle during running. After the rim is processed by a series of procedures, the rim is matched with the radial tire to form a closed inflation cavity to meet the requirement of a tubeless tire, so that the requirements on the dimensional precision and the thinning amount of the formed rim are extremely high. When the uniformity of the tire is detected, the gravity center of the wheel deviates from the rotation center due to the factors of non-uniform material of a rim, incomplete and symmetrical shape, processing error and the like, so that unbalance is generated, and the uniformity detection result of the tire is influenced; the RFV of a tire is not consistent with the RFV of a tire-rim system, and the radial and lateral runout of the rim at the contact portion with the bead seat of the tire is an important factor affecting the uniformity of the wheel system. The uniformity impact of the rim on the tire-rim system is mainly reflected in the following 2 aspects:
(1) The radial runout of the rim affects the H1RFV of the tire-rim system.
(2) The lateral runout of the rim affects the high order component of RFV of the tire-rim system (more than 2).
The high-precision rim is an aluminum alloy rim with sufficient strength (fatigue strength and impact strength) and high roundness, namely excellent geometric precision (the perimeter deviation of the rim, the radial runout, the end face runout, the flatness of a spoke mounting surface, the centering precision of the wheel, the section thickness tolerance and the precision of a valve hole) and good balance (the dynamic balance and the static balance of the wheel relative to the self centering reference and the unbalance can be corrected by a balance block), so that the motion precision of the wheel can be improved, and the high-precision rim is suitable for high-speed running; the high-precision rim has good energy absorption performance, can absorb vibration and noise from a road surface, and improves the running smoothness of a vehicle; the high-precision rim has high rigidity, and the damage of road surface impact to the shape of the rim can be effectively reduced.
Therefore, when testing is performed using high speed uniformity equipment, the tire is typically mounted on a high precision rim. In summary, a precision verification process of a high-precision rim, and specific test items and evaluation indexes are provided, so as to ensure the precision of the rim and reduce errors, thereby ensuring that the measured data reflects the real uniformity of the tire.
At present, the national standard GB/T9769 provides a detection method for a rim contour shape part, and the Row standard QCT242 provides a static unbalance requirement and a test method for a wheel. The high-speed uniformity test is referred to in the JASO C618 standard, and a high-precision rim is adopted, and the precision requirement of the high-precision rim is specified.
Disclosure of Invention
The invention provides a high-precision rim precision verification method for verifying high-speed tire uniformity equipment through dimensional precision inspection, static unbalance inspection, air tightness inspection and tire and rim assembly test data reproducibility, which ensures the rim precision and reduces errors so as to ensure that the measured data reflects the real uniformity of a tire.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for verifying the precision of a high-precision rim for a high-speed tire uniformity device comprises the following steps:
firstly, checking the dimensional accuracy of a rim;
the rim dimensional accuracy inspection items and requirements are as follows:
1. the radial runout of the tire bead seat and the lateral runout of the wheel rim are less than or equal to 0.05 mm;
2. the deflection of the rim bead seat in the measurement is less than or equal to 0.05 mm;
3. the difference between the outer diameters of the inner and outer rim bead seats is less than or equal to 0.1 mm;
4. The symmetry of the equatorial plane of the wheel of the bead seats of the inner rim and the outer rim is +/-0.05 mm;
secondly, checking the static unbalance of the rim;
positioning and fixing the high-precision rim on a rotor balancing machine, inputting corresponding parameters according to the operation requirements of the balancing machine, and starting the balancing machine to measure, wherein the static unbalance requirement of the high-precision rim is less than or equal to 0.5 kg.mm;
thirdly, verifying selection of the fetus;
the verification tire selection steps are as follows:
(a) the preliminary selection of the tire is verified, namely a new tire which is parked for 24 hours at room temperature at least after vulcanization is adopted, the tire has no obvious appearance defects and deformation, the surface needs to be clean and dry, no foreign matters exist, and the storage period does not exceed 6 months;
(b) low speed uniformity and dynamic balance requirements; selecting a tire with qualified uniformity dynamic balance test and excellent indexes, wherein the RFV mean value is required to be less than or equal to 7 kg; wherein the low-speed uniformity test air pressure is as follows: 200kPa, test load is: 75% tire sidewall maximum load, tire rotational speed: 60 r/min;
fourthly, checking the sealing performance of the rim and tire assembly;
assembling the tire and the rim, calibrating the air pressure to be 250kPa, standing for 24 hours at the ambient temperature of 25 +/-3 ℃, and measuring the air pressure again, wherein the air pressure change rate is required to be less than or equal to 0.6 percent;
fifthly, checking the fitting degree of the tire and rim assembly;
Respectively carrying out high-speed uniformity tests at a plurality of speeds for 10-15min at the conditions of the test air pressure of 220kPa and the test load of 70% of the maximum load of the tire side wall, wherein the speed is 80-120 km/h; after the test is finished, calculating the standard deviation of the test data for multiple times at the same speed to judge the fitting degree condition of the tire and rim assembly, wherein the standard deviation index limiting values are as follows: h1RFV is less than or equal to 3.0N, H2RFV is less than or equal to 3.0N, H1TFV is less than or equal to 4.0N, H2TFV is less than or equal to 4.0N, H1LFV is less than or equal to 3.0N, H2LFV is less than or equal to 3.0N, TLRO is less than or equal to 0.05mm, CRRO is less than or equal to 0.05mm, BLRO is less than or equal to 0.05 mm; the CRRO is the tread center run-out, the TLRO is the upper side wall run-out, and the BLRO is the lower side wall run-out;
the results measured in the first step, the second step, the third step, the fourth step and the fifth step all meet the specified index requirements, and the high-precision rim can be judged to be qualified.
Drawings
FIG. 1 is a flow chart of the accuracy verification of a high-accuracy rim for a tire high-speed uniformity apparatus.
Detailed Description
A high-precision rim precision verification method for tire high-speed uniformity equipment comprises the following steps and requirements:
(1) checking the dimensional accuracy of the wheel rim;
(2) checking the static unbalance of the wheel rim;
(3) verifying selection of the tire;
(4) checking the tightness of the rim and tire assembly;
(5) And (5) checking the fitting degree of the tire and rim assembly.
The items and requirements for the rim dimensional accuracy inspection are shown in table 1.
TABLE 1 rim dimensional accuracy inspection items and requirements
And the wheel rim static unbalance amount inspection is to position and fix the high-precision wheel rim on a rotor balancing machine, input corresponding parameters according to the operation requirements of the balancing machine, and start the balancing machine to measure, wherein the requirement of the high-precision wheel rim static unbalance amount is less than or equal to 0.5 kg.mm.
The verification tire selection steps are as follows:
(a) the preliminary selection of the tire is verified to be a new tire which is parked for 24 hours at room temperature at least after vulcanization, has no obvious appearance defects and deformation, needs clean and dry surface, has no foreign matters, and has a storage period of not more than 6 months.
(b) Low speed uniformity and dynamic balance requirements. Selecting a tire with qualified uniformity dynamic balance test and excellent indexes, and requiring the RFV mean value to be less than or equal to 7 kg. Wherein the low-speed uniformity test air pressure is as follows: 200kPa, test load is: 75% tire sidewall maximum load, tire rotational speed: 60 r/min.
And the tightness inspection of the rim and the tire assembly is to assemble the tire and the rim, calibrate the air pressure to 250kPa, stand for 24 hours at the ambient temperature of 25 +/-3 ℃, measure the air pressure again and require that the air pressure change rate is less than or equal to 0.6 percent.
The checking of the tire and rim assembly fitting degree refers to that 5 times of high speed uniformity tests (HSU) are respectively carried out at 3 speeds under the conditions that the testing air pressure is 220kPa and the testing load is 70% of the maximum load of the tire side wall, the specific method steps are shown in table 2, the standard deviation of 5 times of testing data at the same speed is calculated after the tests are finished so as to judge the fitting degree condition of the tire and rim assembly, and the index limit value of the standard deviation is shown in table 3.
TABLE 2 testing procedure for checking the fitting degree of a tire and rim assembly HSU
TABLE 3 tyre rim fitting degree inspection-high speed uniformity parameter index limit
Remarking: CRRO is tread center run out, TLRO is upper sidewall run out, BLRO is lower sidewall run out.
And (3) the results measured in the steps (1), (2), (4) and (5) all meet the specified index requirements, so that the acceptance of the high-precision rim can be judged to be qualified.
The technical solution of the present invention is further illustrated below by an aluminum alloy test rim with a specification of 6.5 jx 17.
The rim dimensional accuracy check is shown in table 4.
TABLE 4 rim dimensional accuracy inspection items and requirements
Positioning and fixing the aluminum alloy test rim on a rotor balancing machine, inputting corresponding parameters according to the operation requirements of the balancing machine, starting the balancing machine to measure, wherein the static unbalance result is 0.32 kg.mm, and the requirement is not more than 0.5 kg.mm.
The tyre with 225/65R 17102H and symmetrical pattern is extracted, the production period is within 6 months, and the low-speed uniformity and dynamic balance indexes are excellent (generally A and the like).
Assembling the tire and the aluminum alloy test rim together, calibrating the air pressure to be 250kPa, then standing the tire and rim assembly for 24 hours at the ambient temperature of 25 +/-3 ℃, wherein the air pressure is 249.7kPa, the air leakage rate is 0.12 percent, and the requirement is not more than 0.6 percent.
The tire and rim assembly was subjected to HSU5 × 3 high speed uniformity test according to the method and steps shown in table 2, wherein the test air pressure was 220kPa, the test load was 595kg, and the fit of the tire and rim assembly was evaluated by calculating the standard deviation of 5 test data at the same speed.
The analysis results of the test data are shown in table 5, and the standard deviation is within the range of table 3, so that the fitting degree of the tire and rim assembly can be judged to meet the requirements.
TABLE 5 HSU 5X 3 test data analysis results
The dimensional accuracy inspection, static unbalance inspection, tire and rim assembly air tightness inspection and tire and rim assembly matching degree inspection of the aluminum alloy test rim 6.5J multiplied by 17 meet the requirement of a high-accuracy rim, the inspection acceptance is qualified, and the method can be used for detecting the high-speed uniformity of a tire.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention, including any reference to the above-mentioned embodiments. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. A method for verifying the precision of a high-precision rim for a high-speed tire uniformity device is characterized by comprising the following steps of:
firstly, checking the dimensional accuracy of a rim;
the rim dimensional accuracy inspection items and requirements are as follows:
1. the radial runout of the tire bead seat and the lateral runout of the wheel rim are less than or equal to 0.05 mm;
2. the deflection of the rim bead seat in the measurement is less than or equal to 0.05 mm;
3. the outer diameter difference of the inner and outer rim bead seats is less than or equal to 0.1 mm;
4. the symmetry of the equatorial plane of the wheel of the bead seats of the inner rim and the outer rim is +/-0.05 mm;
secondly, checking the static unbalance of the rim;
positioning and fixing the high-precision rim on a rotor balancing machine, inputting corresponding parameters according to the operation requirements of the balancing machine, and starting the balancing machine to measure, wherein the static unbalance requirement of the high-precision rim is less than or equal to 0.5 kg.mm;
thirdly, verifying selection of the fetus;
the verification tire selection steps are as follows:
(a) the preliminary selection of the tire is verified, namely a new tire which is parked for 24 hours at room temperature at least after vulcanization is adopted, the tire has no obvious appearance defects and deformation, the surface needs to be clean and dry, no foreign matters exist, and the storage period does not exceed 6 months;
(b) low speed uniformity and dynamic balance requirements; selecting a tire with qualified uniformity dynamic balance test and excellent indexes, wherein the RFV mean value is required to be less than or equal to 7 kg; wherein the low-speed uniformity test air pressure is as follows: 200kPa, test load is: 75% tire sidewall maximum load, tire rotational speed: 60 r/min;
Fourthly, checking the sealing performance of the rim and tire assembly;
assembling the tire and the rim, calibrating the air pressure to be 250kPa, standing for 24 hours at the ambient temperature of 25 +/-3 ℃, and measuring the air pressure again, wherein the air pressure change rate is required to be less than or equal to 0.6 percent;
fifthly, checking the fitting degree of the tire and rim assembly;
under the conditions that the testing air pressure is 220kPa and the testing load is 70% of the maximum load of the tire side wall, a plurality of high-speed uniformity tests are respectively carried out at a plurality of speeds, wherein the speed is 80-120km/h and the time is 10-15 min; after the test is finished, calculating the standard deviation of the test data for multiple times at the same speed to judge the fitting degree condition of the tire and rim assembly, wherein the standard deviation index limiting values are as follows: h1RFV is less than or equal to 3.0N, H2RFV is less than or equal to 3.0N, H1TFV is less than or equal to 4.0N, H2TFV is less than or equal to 4.0N, H1LFV is less than or equal to 3.0N, H2LFV is less than or equal to 3.0N, TLRO is less than or equal to 0.05mm, CRRO is less than or equal to 0.05mm, BLRO is less than or equal to 0.05 mm; the CRRO is the tread center run-out, TLRO is the upper sidewall run-out, and BLRO is the lower sidewall run-out;
the results measured in the first, second, third, fourth and fifth steps all meet the specified index requirements, so that the high-precision rim can be judged to be qualified;
the fifth step is to perform 5 high-speed uniformity tests at 3 speeds, respectively, as shown in the following table:
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01314935A (en) * | 1988-06-16 | 1989-12-20 | Bridgestone Corp | Method for measuring high speed radial runout of tire, method for selecting tire utilizing said method and method for matching tire with rim |
| CN1394173A (en) * | 2000-10-31 | 2003-01-29 | 本田技研工业株式会社 | Assembling method for tire wheel assembly and assembling line for tire wheel assembly and wheel and production method for wheel |
| JP2009025148A (en) * | 2007-07-19 | 2009-02-05 | Bridgestone Corp | Rim wheel for measuring uniformity and uniformity measuring method |
| CN112345273A (en) * | 2020-09-29 | 2021-02-09 | 中策橡胶集团有限公司 | Tire high-speed uniformity equipment controlled tire monitoring method |
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- 2021-03-01 CN CN202110225884.0A patent/CN113029602B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01314935A (en) * | 1988-06-16 | 1989-12-20 | Bridgestone Corp | Method for measuring high speed radial runout of tire, method for selecting tire utilizing said method and method for matching tire with rim |
| CN1394173A (en) * | 2000-10-31 | 2003-01-29 | 本田技研工业株式会社 | Assembling method for tire wheel assembly and assembling line for tire wheel assembly and wheel and production method for wheel |
| JP2009025148A (en) * | 2007-07-19 | 2009-02-05 | Bridgestone Corp | Rim wheel for measuring uniformity and uniformity measuring method |
| CN112345273A (en) * | 2020-09-29 | 2021-02-09 | 中策橡胶集团有限公司 | Tire high-speed uniformity equipment controlled tire monitoring method |
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