CN115790472A - Bias and skew inspection method, system, storage medium and equipment for diagonal tire bead - Google Patents
Bias and skew inspection method, system, storage medium and equipment for diagonal tire bead Download PDFInfo
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- CN115790472A CN115790472A CN202211669861.XA CN202211669861A CN115790472A CN 115790472 A CN115790472 A CN 115790472A CN 202211669861 A CN202211669861 A CN 202211669861A CN 115790472 A CN115790472 A CN 115790472A
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention relates to a skew inspection method, a skew inspection system, a storage medium and a device for a bead of a bias tire, belonging to the technical field of finished product inspection of the bias tire.
Description
Technical Field
The invention belongs to the technical field of finished product detection of bias tires, and particularly relates to a method, a system, a storage medium and equipment for detecting the deflection of a tire bead of a bias tire.
Background
The multiple-steel-wire-ring bias tire occasionally has the phenomenon of tire burst in the use process, so that property loss is caused, and even personal safety is threatened. And cutting the section of the tire burst returned by the market, and finding out that: the deflection of the bead ring at the bead position leads to the deflection of the bead position, and further leads to tire burst. As shown in fig. 1, the No. 1 bead ring is deflected, the No. 2 bead ring is not deflected, and fig. 2 shows a standard bead ring position. Therefore, in order to prevent the defective bias tire from being delivered to the market, the bias tire bead (bead ring) deflection inspection is required before the bias tire is put into storage.
The tire bead position of the radial engineering tire is pure rubber, and based on the particularity of the molding process, the deviation exists between the thickness of the tire bead position material after vulcanization and a design standard value. If the deviation value exceeds the standard, the steel wire ring is judged to be deviated. However, the tire bead position material of the multi-bead bias tire includes both the cord and the rubber, and the tire bead position material thickness detection method used in the radial engineering tire at present cannot be directly used for detecting the material thickness of the tire bead position of the bias tire, and therefore, cannot detect whether the tire bead of the bias tire is deviated or not.
Disclosure of Invention
In order to solve the above problems, a method, a system, a storage medium, and an apparatus for inspecting skew of a bead of a bias tire are provided.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, a skew tire bead test method includes the steps of:
based on the circumference of a bead ring of the bias tire, acquiring the thickness values of a plurality of measuring points on the circumference through an ultrasonic probe, wherein the thickness values are the material thickness values of the area between the measuring points and the surface of the bead;
and taking the thickness values of the measuring points on the circumference at 180 degrees intervals as differences to obtain a plurality of thickness difference values, comparing the plurality of thickness difference values with a preset standard threshold value one by one, outputting an inspection result that the steel wire ring is inclined when the thickness difference value is larger than the preset standard threshold value as a comparison result, and outputting an inspection result that the steel wire ring is not inclined when all the thickness difference values are not larger than the preset standard threshold value as the comparison result.
The technical scheme is further set that the circumference of the bead ring of the bias tire bead is as follows:
obtaining the relative position and the standard distance between the bead ring and the tire bead based on the design standard of the bias tire product, and determining the circumference of the bead ring based on the relative position and the standard distance.
The technical scheme is further that at least 4 measuring points are taken on the circumference, and at least 2 thickness difference values are formed by the at least 4 measuring points.
This technical scheme further sets up to, obtain the thickness value that is located a plurality of measuring points on this circumference through ultrasonic transducer, specifically do:
attaching the ultrasonic probe to the surface of the tire bead corresponding to the measuring point to obtain the thickness value of the measuring point;
and moving the ultrasonic probe to the surface of the tire bead corresponding to the next measuring point, and acquiring the thickness value of each measuring point one by one.
The technical scheme is further set that the standard threshold is an allowable difference value between an actual thickness value of the circumference of the bead ring and a design thickness value, wherein the allowable difference value is specified in the design standard of the bias tire product, the actual thickness value is an actual material thickness value of a region between the circumference of the bead ring and the surface of the bead, and the design thickness value is a material design thickness value of a region between the circumference of the bead ring and the surface of the bead;
and setting the thickness difference value of two measuring points which are arranged on the circumference at 180 degrees as b, and setting the standard threshold value as c, wherein b is less than or equal to 2c.
This technical scheme further sets up to, still includes:
and sequentially checking whether all the steel wire rings at the tire bead positions of the bias tire are deflected or not, outputting unqualified quality checking results of the tire bead and the bias tire when the checking results show that the steel wire rings are deflected, and outputting qualified quality checking results of the tire bead and the bias tire when all the checking results show that the steel wire rings are not deflected.
In a second aspect, the present invention provides a bias tire bead skewing inspection system comprising:
the data acquisition unit is used for acquiring the thickness values of a plurality of measuring points on the circumference based on the circumference of the bead ring of the bias tire, wherein the thickness values are the material thickness values of the area between the measuring points and the surface of the bead ring;
the data processing unit is used for obtaining a plurality of thickness difference values by taking the thickness values of the measuring points which are arranged on the circumference at intervals of 180 degrees as differences, and comparing the thickness difference values with a preset standard threshold value one by one;
and the data output unit is used for outputting a detection result that the steel wire ring is inclined when the comparison result is that the thickness difference value is greater than a preset standard threshold value, and outputting a detection result that the steel wire ring is not inclined when all the thickness difference values are not greater than the preset standard threshold value.
In a third aspect, the present invention also provides a storage medium storing a program that executes the steps in the bias bead skew inspection method for a bias tire.
In a fourth aspect, the present invention also provides an apparatus comprising a memory and a processor;
the memory has stored thereon a computer readable program executable by the processor;
the processor, when executing the computer readable program, implements the steps in the bias tire bead skew inspection method.
The invention has the beneficial effects that:
1. the method has the advantages that measuring points are taken along the circumferential direction of the circumference where the bead ring is located, the thickness difference value of two measuring points which are 180 degrees apart on the circumference is compared with a standard threshold value, whether the bias tire is qualified or not is detected, the detection of a cut surface is not needed, and the method is simple, convenient and high in efficiency.
2. The detection accuracy is high, the cross section of the oblique crossing tire which is detected to be an unqualified product by a thickness difference method is cut, and the accuracy of the thickness difference method in the aspect of verifying the deflection of the steel wire ring is verified.
3. The skew condition of the tire bead of the skew tire can be effectively identified and controlled, and the unqualified skew tire with the skewed tire bead is prevented from flowing to the market.
Drawings
FIG. 1 is a schematic view of a No. 1 traveler suffering from deflection;
FIG. 2 is a schematic illustration of a standard traveler location;
FIG. 3 is a schematic view of a skew inspection method for a bead of a bias tire according to the present invention;
FIG. 4 is a schematic view of a multi-bead bias tire bead location;
FIG. 5 is a schematic view of a multi-bead bias tire with wire loops skewed;
FIG. 6 is a schematic view of 4 measurement points taken at the circumference of the bead ring;
FIG. 7 is a schematic illustration of the difference in thickness values of the 4 measurement points of FIG. 6;
FIG. 8 is a schematic view of a bias tire bead skewing inspection system of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions of the present invention are described below clearly and completely with reference to the accompanying drawings of the present invention, and based on the embodiments in the present application, other similar embodiments obtained by a person of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for illustrating the present invention and not for limiting the present invention.
The first embodiment is as follows:
as shown in fig. 3, a skew tire bead test method includes the following steps:
s100, based on the circumference of the bead ring of the bias tire, obtaining the thickness values of a plurality of measuring points on the circumference through an ultrasonic probe, wherein the thickness values are the material thickness values of the area between the measuring points and the surface of the bead.
The circumference of the bead ring of the bias tire bead is as follows:
obtaining the relative position and the standard distance between the bead ring and the tire bead based on the design standard of the bias tire product, and determining the circumference of the bead ring based on the relative position and the standard distance.
The method comprises the following steps of obtaining the thickness values of a plurality of measuring points on the circumference through the ultrasonic probe, specifically:
attaching the ultrasonic probe to the surface of the tire bead corresponding to the measuring point to obtain the thickness value of the measuring point; and moving the ultrasonic probe to the surface of the tire bead corresponding to the next measuring point, and acquiring the thickness value of each measuring point one by one.
S200, subtracting the thickness values of the measuring points on the circumference at 180 degrees to obtain a plurality of thickness difference values, comparing the plurality of thickness difference values with a preset standard threshold value one by one, outputting an inspection result that the steel wire ring is inclined when the thickness difference value is larger than the preset standard threshold value as a comparison result, and outputting an inspection result that the steel wire ring is not inclined when all the thickness difference values are not larger than the preset standard threshold value as the comparison result.
As shown in fig. 5, in the event of a multi-bead bias tire, the material thickness of the region between the bead ring and the bead surface may be greatly different in the entire circumferential direction, i.e., there is a region of thickness difference, and therefore, at least 4 measurement points are taken on the circumference, and the at least 4 measurement points form at least 2 thickness differences.
The standard threshold value is an allowable difference value between an actual thickness value and a designed thickness value of the circumference of the bead ring specified in the design standard of the bias tire product, the actual thickness value is an actual thickness value of a material in a region between the circumference of the bead ring and the surface of the bead, and the designed thickness value is a designed thickness value of the material in a region between the circumference of the bead ring and the surface of the bead.
Specifically, the thickness difference of two measuring points which are arranged on the circumference at an interval of 180 degrees is set as b, and a standard threshold value is set as c, so that b is less than or equal to 2c.
Specifically, when the output inspection result is that the steel wire ring is deviated, the process from S100 to S200 is repeated for more than 2 times, the inspection result accounting for more than 50% of the steel wire ring is taken as a final detection result, accidental factors are eliminated, and the accuracy of the inspection result is ensured.
In addition, the method further comprises the following steps: and sequentially testing whether all the bead rings at the positions of the bead of the bias tire are inclined or not, outputting unqualified quality test results of the bead and the bias tire when the test results show that the bead rings are inclined, and outputting qualified quality test results of the bead and the bias tire when all the test results show that the bead rings are not inclined.
The ultrasonic wave has accuracy and operability in the aspect of pure rubber thickness detection, the multi-bead-ring bias tire bead part comprises a plurality of layers of tire body reverse cladding layers, a plurality of layers of tire body forward cladding layers and a bead wrapping cloth layer, as shown in fig. 4, wherein the tire body reverse cladding layers comprise nylon cords and rubber materials, the tire body forward cladding layers comprise the nylon cords and the rubber materials, and the bead wrapping cloth layer comprises the nylon cords and the rubber materials. Based on the condition that the material at the tire bead part of the bias tire has both the cord and the sizing material, whether the difference of the material thickness between the bead ring and the surface of the tire bead can be accurately reflected by the prior verification of ultrasonic measurement is specifically as follows:
1. taking 4 measuring points in the whole circumferential direction of the bead ring, wherein the 4 measuring points are respectively positioned at 0 degree, 180 degrees, 90 degrees and 270 degrees, measuring and recording the four measuring points on the same circumference by using an ultrasonic probe, in the design stage of the bias tire finished product, the relative position and the distance between the bead ring and the tire bead surface have standard regulations, and judging the circumference of the bead ring measured by the ultrasonic probe based on the standard regulations. It should be noted that, when the bead ring is deflected, only the eccentricity does not deviate, that is, even if the bead ring is deflected, the position of the circumference where the bead ring is located does not change.
2. The difference of the thickness values of 4 measuring points in the circumferential direction is found through ultrasonic measurement, and the 4 thickness values are respectively A, B, C and D, as shown in FIG. 6. The difference between the 4 thickness values yields Δ 1, Δ 2, Δ 3, Δ 4, Δ 5, Δ 6, and as shown in fig. 7, the difference between Δ 1 and Δ 2 is found to be the largest, i.e., the difference between the thicknesses of two measurement points 180 ° apart on the circumference is the largest.
It is to be noted that Δ 1 represents the difference between the thickness value a and the thickness value B, Δ 2 represents the difference between the thickness value C and the thickness value D, Δ 3 represents the difference between the thickness value a and the thickness value D, Δ 4 represents the difference between the thickness value B and the thickness value D, Δ 5 represents the difference between the thickness value C and the thickness value B, and Δ 6 represents the difference between the thickness value a and the thickness value C.
3. Calibrating and cutting the cross section of the cross ply tire measured in the step 1 and the step 2, calibrating the cross section of a 0-degree measuring point and a 180-degree measuring point after cutting and the cross section of a 90-degree measuring point and a 270-degree measuring point respectively, measuring the actual value of the material thickness between the measuring points and the tire bead surface by using calipers, and calculating the delta 1', the delta 2', the delta 1 'and the delta 2' in the same way as the calculating method of the delta 1 and the delta 2, and the description is omitted.
4. Comparing the delta 1 'with the delta 1, and comparing the delta 2' with the delta 2 to find that the thickness difference value obtained by the ultrasonic probe has strong positive correlation with the thickness difference value of the tire section actually measured by the caliper, and verifying the accuracy of the thickness difference value obtained by the ultrasonic probe in verifying the deflection of the bead ring, so that the thickness difference value obtained by the ultrasonic probe is selected as a judgment value for judging the deflection of the multi-bead ring oblique crossing tire steel ring.
The verification process from step 1 to step 4 was performed on a plurality of bias tire finished products, and the obtained partial data are shown in table 1:
table 1:
in the verification measurement process, the thickness value measured by the caliper is recorded as a, the thickness value measured by the ultrasonic probe is recorded as b, the cord thickness of the turn-up carcass is recorded as h, the layer number of the turn-up carcass is recorded as o, and then a = b + h × o.
It is worth mentioning that repeated practice verifies that: when the ultrasonic probe is used for measuring the thickness, the ultrasonic waves can penetrate through the carcass forward cladding layer and the bead wrapping cloth layer, but cannot penetrate through the turn-up carcass layer, namely, the thickness value measured by the ultrasonic probe comprises the thickness of the carcass forward cladding layer and the thickness of the bead wrapping cloth layer.
The material design thickness value of the area between the circumference of the bead ring and the surface of the bead is E, and the allowable difference value c between the actual thickness value and the design thickness value is within the range of E +/-c. Another a 1 ＝b 1 +h*o＝E+c、a 2 ＝b 2 +h*o＝E-c，a 1 And a 2 Located on the same circumference and 180 DEG apart, | b 1 -b 2 And | ≦ 2c, so that the judgment range of the thickness difference of two measurement points 180 degrees apart on the circumference is 2c.
As shown in fig. 8, a bias tire bead skewing inspection system includes:
the data acquisition unit is used for acquiring the thickness values of a plurality of measuring points on the circumference on the basis of the circumference where a steel wire ring of the bias tire bead is positioned, wherein the thickness values are the thickness values of materials in the area between the measuring points and the surface of the bead;
the data processing unit is used for obtaining a plurality of thickness difference values by taking the thickness values of the measuring points which are arranged on the circumference at intervals of 180 degrees as differences, and comparing the thickness difference values with a preset standard threshold value one by one;
and the data output unit is used for outputting a detection result that the steel wire ring is inclined when the comparison result is that the thickness difference value is greater than a preset standard threshold value, and outputting a detection result that the steel wire ring is not inclined when all the thickness difference values are not greater than the preset standard threshold value.
A storage medium that stores a program that executes steps in the bias tire bead skew checking method.
An apparatus comprising a memory and a processor;
the memory has stored thereon a computer readable program executable by the processor;
the processor, when executing the computer readable program, implements the steps in the bias tire bead skew inspection method.
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (10)
1. A skew inspection method for a bead of a bias tire is characterized by comprising the following steps:
based on the circumference of a bead ring of the bias tire, acquiring the thickness values of a plurality of measuring points on the circumference through an ultrasonic probe, wherein the thickness values are the material thickness values of the area between the measuring points and the surface of the tire bead;
and taking the thickness values of the measuring points on the circumference at 180 degrees intervals as differences to obtain a plurality of thickness difference values, comparing the plurality of thickness difference values with a preset standard threshold value one by one, outputting an inspection result that the steel wire ring is inclined when the thickness difference value is larger than the preset standard threshold value as a comparison result, and outputting an inspection result that the steel wire ring is not inclined when all the thickness difference values are not larger than the preset standard threshold value as the comparison result.
2. The method for inspecting the deviation of the bead of the bias tire according to claim 1, wherein the bead ring of the bead of the bias tire is located on the circumference, specifically:
obtaining the relative position and the standard distance between the bead ring and the tire bead based on the design standard of the bias tire product, and determining the circumference of the bead ring based on the relative position and the standard distance.
3. The bias tire bead skew inspection method according to claim 1, wherein the thickness values of the plurality of measurement points located on the circumference are obtained by an ultrasonic probe, specifically:
attaching the ultrasonic probe to the surface of the tire bead corresponding to the measuring point to obtain the thickness value of the measuring point;
and moving the ultrasonic probe to the surface of the tire bead corresponding to the next measuring point, and acquiring the thickness value of each measuring point one by one.
4. The bias inspection method for the bead of the bias tire according to claim 1, wherein the standard threshold is an allowable difference between an actual thickness value of the circumference of the bead ring and a design thickness value, the actual thickness value is an actual thickness value of a material in a region between the circumference of the bead ring and the bead surface, and the design thickness value is a design thickness value of a material in a region between the circumference of the bead ring and the bead surface;
and setting the thickness difference value of two measuring points which are arranged on the circumference at 180 degrees as b, and setting the standard threshold value as c, wherein b is less than or equal to 2c.
5. The method for inspecting the bead skewness of a bias tire according to any one of claims 1 to 4, wherein when the outputted inspection result is that the bead ring is skewed, the thickness value of each measurement point is repeatedly acquired 3 times or more.
6. The bias tire bead skew inspection method according to claim 5, further comprising:
and sequentially checking whether all the steel wire rings at the tire bead positions of the bias tire are deflected or not, outputting unqualified quality checking results of the tire bead and the bias tire when the checking results show that the steel wire rings are deflected, and outputting qualified quality checking results of the tire bead and the bias tire when all the checking results show that the steel wire rings are not deflected.
7. A bias tire bead skew inspection method as claimed in claim 1, wherein at least 4 measurement points are taken on the circumference, and said at least 4 measurement points form at least 2 thickness differences.
8. A bias tire bead skewing inspection system, comprising:
the data acquisition unit is used for acquiring the thickness values of a plurality of measuring points on the circumference based on the circumference of the bead ring of the bias tire, wherein the thickness values are the material thickness values of the area between the measuring points and the surface of the bead ring;
the data processing unit is used for obtaining a plurality of thickness difference values by taking the thickness values of the measuring points which are arranged on the circumference at intervals of 180 degrees as differences, and comparing the thickness difference values with a preset standard threshold value one by one;
and the data output unit is used for outputting a detection result that the steel wire ring is inclined when the comparison result is that the thickness difference value is greater than a preset standard threshold value, and outputting a detection result that the steel wire ring is not inclined when all the thickness difference values are not greater than the preset standard threshold value.
9. A storage medium characterized by storing a program that executes the steps in the bias tire bead skewness checking method according to any one of claims 1 to 7.
10. An apparatus comprising a memory and a processor;
the memory has stored thereon a computer readable program executable by the processor;
the processor, when executing the computer readable program, implements the steps in the bias tire bead skewing inspection method of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211669861.XA CN115790472A (en) | 2022-12-25 | 2022-12-25 | Bias and skew inspection method, system, storage medium and equipment for diagonal tire bead |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211669861.XA CN115790472A (en) | 2022-12-25 | 2022-12-25 | Bias and skew inspection method, system, storage medium and equipment for diagonal tire bead |
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| Publication Number | Publication Date |
|---|---|
| CN115790472A true CN115790472A (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211669861.XA Pending CN115790472A (en) | 2022-12-25 | 2022-12-25 | Bias and skew inspection method, system, storage medium and equipment for diagonal tire bead |
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| CN (1) | CN115790472A (en) |
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- 2022-12-25 CN CN202211669861.XA patent/CN115790472A/en active Pending
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