CN112798182B - Method for improving unbalance of tire and tire obtained by method - Google Patents
Method for improving unbalance of tire and tire obtained by method Download PDFInfo
- Publication number
- CN112798182B CN112798182B CN202011491684.1A CN202011491684A CN112798182B CN 112798182 B CN112798182 B CN 112798182B CN 202011491684 A CN202011491684 A CN 202011491684A CN 112798182 B CN112798182 B CN 112798182B
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- tire
- unbalance
- embryo
- roundness
- adhesive tape
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 210000001161 mammalian embryo Anatomy 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000003068 static effect Effects 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000002390 adhesive tape Substances 0.000 claims description 19
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 claims 1
- 239000004568 cement Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000016776 visual perception Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Images
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
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/30—Compensating imbalance
- G01M1/32—Compensating imbalance by adding material to the body to be tested, e.g. by correcting-weights
- G01M1/326—Compensating imbalance by adding material to the body to be tested, e.g. by correcting-weights the body being a vehicle wheel
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Balance (AREA)
Abstract
The invention belongs to the field of tires, and particularly relates to a method for improving unbalance of a tire and the tire obtained by the method. A method of improving tire imbalance, the method comprising one or both of the following steps: step one, detecting out-of-roundness of a tire blank, and repairing static unbalance of the tire according to the out-of-roundness detection result of the tire blank; and secondly, detecting the unbalance of the tire blank through the tire blank, and repairing the dynamic unbalance of the tire according to the detection result of the unbalance of the tire blank. The method is used for realizing unbalance of the tire through detection and repair of the embryo in the tire manufacturing process.
Description
Technical Field
The invention belongs to the field of tires, and particularly relates to a method for improving unbalance of a tire and the tire obtained by the method.
Background
The present invention relates to a method for manufacturing a tire, and more particularly to a method for improving the unbalance mass of a tire by compensating the unbalance mass of an (unvulcanized) green tire. Tire unbalance can be categorized into static unbalance and dynamic unbalance. In recent years, as road conditions continue to increase, so does the demand for comfort by improved users of vehicle performance. A great deal of researches show that the up-down shaking phenomenon of the vehicle at 80-90 km/h is partially caused by poor static balance of the tire. The vehicle is subject to a body or square disc shudder phenomenon around 35km/h due to poor dynamic balance of the tires. For these reasons, tire manufacturers strive to control tire imbalance to a minimum level.
One well known practice is to fill the finished tire (after curing) with a balancing mass using an adhesive cement (e.g., chinese patent application publication No. CN110003723 a). Although this method of compensation is effective, the repaired tire can cause severe internal cement to fall off during use, resulting in poor visual perception for the user. The method for improving the unbalance of a tire by coating cement in a tire is described in detail in the research on the dynamic balance compensation method of a tire published by Lin Xiao.
Another common tire imbalance repair improvement is to employ a method of reducing the radial out-of-roundness of the tire tread. The method is introduced in the paper "research on the grinding method of dynamic balance of tires". The tread is locally ground near the radial out-of-roundness first harmonic. This method is very effective in improving a tire with poor static unbalance, but has less effect on a tire with poor dynamic unbalance, and the buffing of the tread causes poor appearance. As customers demand premium tires, the manner of buffing the tires is becoming increasingly unacceptable.
Disclosure of Invention
In order to solve the above technical problems, an object of the present application is to provide a method for improving a tire unbalance, which is used for repairing the tire unbalance through detecting a green tire in a tire manufacturing process.
In order to achieve the above object, the present application adopts the following technical scheme:
a method of improving tire imbalance, the method comprising one or both of the following steps:
step one, detecting out-of-roundness of a tire blank, and repairing static unbalance of the tire according to the out-of-roundness detection result of the tire blank;
and secondly, detecting the unbalance of the tire blank through the tire blank, and repairing the dynamic unbalance of the tire according to the detection result of the unbalance of the tire blank.
Preferably, the method comprises the steps of firstly detecting out-of-roundness of the embryo to repair the embryo, then detecting unbalance of the embryo, and then repairing the embryo.
Preferably, the first step is as follows:
1) Manufacturing at least one tyre blank according to the process steps;
2) Measuring tread radial out-of-roundness of the at least one embryo by laser scanning and decomposing into at least 8 th harmonic equations;
3) Determining at least one first harmonic low point location;
4) The tire static unbalance is repaired by supplementing or removing or re-rolling the rubber strip at the harmonic wave abnormality of the tread.
Further, step 4) supplement the length of the adhesive tape as follows:
wherein RROH h The non-roundness harmonic wave is w is the width of the supplementary adhesive tape, rho is the density of the supplementary adhesive tape, t is the thickness of the supplementary adhesive tape, and m is the corresponding mass of the harmonic wave.
Preferably, the corresponding m of each subharmonic value of the radial out-of-roundness of the embryo is established in advance, and for repairing multiple harmonics, when the first harmonic is far greater than the multiple harmonics, only the first harmonic is required to be repaired; when the multiple harmonics have harmonics greater than one harmonic, the multiple harmonics need to be repaired.
Preferably, the second step is as follows:
1) Manufacturing at least one tire embryo according to the process steps, detecting the unbalance m of both sides of the embryo side by unbalance u and ml 2) determining the two-sided tap position, and performing rubberizing strip compensation on the side wall by unbalance of two sides of the side wall.
Further, the lengths of the two compensating adhesive tapes in the step 2) are respectively as follows:
wherein: w is the width of the supplementary adhesive tape, ρ is the density of the supplementary adhesive tape, t is the thickness of the supplementary adhesive tape, R 0 R is the inner radius of the tire 1 Is the radius of the sidewall repair point.
Further, the application also discloses a production method of the tire, and the method adopts the method of any one of the technical proposal to repair the tire blank and then vulcanize the tire blank to produce the tire for improving the unbalance of the tire.
Further, the application also discloses a tire, and the tire is prepared by the method.
By adopting the technical scheme, the method is used for detecting and repairing the tire blank in the tire manufacturing process to realize the unbalance of the tire. Of course, the present application is not limited to embryo imbalance repair, and building up an embryo imbalance database provides for prior shaping improvements through repair case accumulation.
Drawings
FIG. 1 is a flow of embryo imbalance repair.
FIG. 2 is a schematic illustration of 205/55R16 embryo repair.
Detailed Description
The technical scheme of the invention is further described below through specific embodiments.
1. Taking a 205/55R16 tire blank as an example, firstly, out-of-roundness detection is carried out, a radial out-of-roundness first harmonic low point is measured to be (6,70 degrees), and a known adhesive tape W:6cm, ρ:1.25g/cm 3 And t:0.15cm, the first harmonic corresponds to mass m:2g/mm, calculated as follows from the data at 70 degrees of tread:
and (3) after the adhesive tape is adhered, carrying out-of-roundness detection on the tire blank, wherein the detection result (3,65 degrees) shows that the first harmonic of the out-of-roundness of the tire blank is reduced, and finally, detecting the static unbalance of the tire after the tire blank is vulcanized. The measurement result showed 5g, the static unbalance of the specification was 15g on average, and the average value was reduced by 10g.
2. And (3) carrying out-of-roundness detection on the other tire with the specification, measuring a radial out-of-roundness primary harmonic high point to be (8,120 degrees), rolling at the high point (120 degrees), measuring out-of-roundness primary harmonic (4,115 degrees) after rolling, and finally, measuring the static unbalance amount to be 7g through vulcanization, wherein the static unbalance amount is reduced by 8g compared with the average value.
3. And (3) carrying out unbalance detection on the other tire blank with the specification, wherein the test result is (30, 130 degrees), (35, 100 degrees), and the rubber strips are respectively stuck at the positions of 130 degrees of the left tire side and 100 degrees of the right tire side according to the data. From the known strip W:6cm, ρ:1.15g/cm 3 ，t：1.5mm，R 0 ：202mm，R1：260mm，m u :30g，m 1 35g, calculated as follows:
and (3) after the adhesive tape is adhered, carrying out unbalance test on the tire blank, wherein the results are (10,125 degrees) and (7,112 degrees), and finally, detecting the unbalance condition of the tire after the tire blank is vulcanized. The results show the final unbalance of the tire (9,120 °) (8,105 °).
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art. The generic principles defined herein may be applied to 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 (4)
1. A method of improving tire unbalance, the method comprising one or both of the following steps:
step one, detecting out-of-roundness of a tire blank, and repairing static unbalance of the tire according to the out-of-roundness detection result of the tire blank;
step two, detecting the unbalance of the tire blank through the tire blank, and repairing the dynamic unbalance of the tire according to the detection result of the unbalance of the tire blank;
the first step is as follows:
1) Manufacturing at least one tyre blank according to the process steps;
2) Measuring tread radial out-of-roundness of the at least one embryo by laser scanning and decomposing into at least 8 th harmonic equations;
3) Determining at least one first harmonic low point location;
4) Repairing the static unbalance of the tire by supplementing or removing or re-rolling the rubber strip at the abnormal position of the tread harmonic wave; the length of the supplementary adhesive tape is as follows:
wherein ,RROH h the non-roundness harmonic wave is w is the width of the supplementary adhesive tape, rho is the density of the supplementary adhesive tape, t is the thickness of the supplementary adhesive tape, and m is the corresponding mass of the harmonic wave;
the second step is as follows:
1) Manufacturing at least one tire embryo according to the process steps, and detecting the unbalance mass m of the two sides of the embryo side by unbalance u and m1 ；
2) Determining the positions of the light points on two sides, and compensating rubberizing strips at the positions of the sidewalls by unbalance on two sides of the sidewalls; the lengths of the two compensation adhesive tapes are respectively as follows:
wherein: w is the width of the supplementary adhesive tape, ρ is the density of the supplementary adhesive tape, t is the thickness of the supplementary adhesive tape, R 0 R is the inner radius of the tire 1 Is the radius of the sidewall repair point.
2. The method of claim 1, wherein the method comprises repairing the embryo by performing an out-of-roundness test on the embryo, and then repairing the embryo by performing an imbalance test on the embryo.
3. The method according to claim 1, wherein the corresponding mass m of each subharmonic value of the radial out-of-roundness of the embryo is established in advance, and for the repair of multiple harmonics, when the first harmonic is far greater than the multiple harmonics, only the first harmonic needs to be repaired; when the multiple harmonics have harmonics greater than one harmonic, the multiple harmonics need to be repaired.
4. A process for producing tyres, characterized in that it comprises repairing the green tyre by the process according to any one of claims 1-3 and then vulcanizing the same, thus obtaining a tyre with improved tyre unbalance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011491684.1A CN112798182B (en) | 2020-12-17 | 2020-12-17 | Method for improving unbalance of tire and tire obtained by method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011491684.1A CN112798182B (en) | 2020-12-17 | 2020-12-17 | Method for improving unbalance of tire and tire obtained by method |
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| Publication Number | Publication Date |
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| CN112798182A CN112798182A (en) | 2021-05-14 |
| CN112798182B true CN112798182B (en) | 2023-05-23 |
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Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2649043B1 (en) * | 1989-06-30 | 1991-09-20 | Michelin & Cie | METHOD FOR CORRECTING RADIAL FORCE VARIATIONS BETWEEN TIRE AND GROUND |
| JPH07113715A (en) * | 1993-10-14 | 1995-05-02 | Bridgestone Corp | Weight unbalance rectifying method for tire |
| DE19837680C2 (en) * | 1998-08-19 | 2001-05-17 | Continental Ag | Process for improving tire runout and device and drum for carrying out this process |
| JP2002168723A (en) * | 2000-11-30 | 2002-06-14 | Bridgestone Corp | Tire unbalance correcting method and rim-fitted tire |
| EP1824665B1 (en) * | 2004-11-19 | 2014-01-08 | Compagnie Générale des Etablissements Michelin | Tire manufacturing method for improving the uniformity of a tire |
| CN100562734C (en) * | 2006-09-11 | 2009-11-25 | 青岛高校软控股份有限公司 | The measuring method of tyre non-circularity |
| US9823153B2 (en) * | 2013-06-18 | 2017-11-21 | Compagnie Generale Des Etablissements Michelin | Tire uniformity improvement through identification of process harmonics from static balance measurements |
| EP3049239B1 (en) * | 2013-09-26 | 2019-11-06 | Compagnie Générale des Etablissements Michelin | Correction of localized tire surface anomalies |
| JP2017109443A (en) * | 2015-12-18 | 2017-06-22 | 東洋ゴム工業株式会社 | Green tire manufacturing method and pneumatic tire manufacturing method |
| CN107121236B (en) * | 2017-04-27 | 2019-03-08 | 特拓(青岛)轮胎技术有限公司 | The tire static unbalance ameliorative way calculated based on vector |
| CN110003723A (en) * | 2019-04-08 | 2019-07-12 | 中策橡胶集团有限公司 | A kind of tire dynamic and balance amendment rubber cement and preparation method thereof |
| CN110588033B (en) * | 2019-08-27 | 2021-10-22 | 赛轮集团股份有限公司 | System and method for automatically identifying and improving roundness of tire blank on line |
| CN111998792B (en) * | 2020-08-25 | 2022-08-26 | 赛轮集团股份有限公司 | On-line detection method and on-line detection device for tire blank out-of-roundness of tire building machine |
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Address after: 310008 No. 1, No. 1 Street, Qiantang District, Hangzhou, Zhejiang Applicant after: Zhongce Rubber Group Co.,Ltd. Address before: 310008 No.1 Baiyang street, Qiantang New District, Hangzhou City, Zhejiang Province Applicant before: ZHONGCE RUBBER GROUP Co.,Ltd. |
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