CN111998792A - On-line detection method and on-line detection device for tire blank out-of-roundness of tire building machine - Google Patents
On-line detection method and on-line detection device for tire blank out-of-roundness of tire building machine Download PDFInfo
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- CN111998792A CN111998792A CN202010862351.9A CN202010862351A CN111998792A CN 111998792 A CN111998792 A CN 111998792A CN 202010862351 A CN202010862351 A CN 202010862351A CN 111998792 A CN111998792 A CN 111998792A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/2408—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring roundness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses an on-line detection method and an on-line detection device for tire blank out-of-roundness of a tire building machine, wherein the on-line detection method comprises the following steps: (1) after a tire blank is formed on a forming drum of a tire forming machine, rotating the forming drum, measuring the distance from a detector to the tire blank in real time by adopting the detector, and recording real-time measurement data measured by the detector and a square point corresponding to the real-time measurement data; (2) calculating the difference value between the distance from the detector to the center of the embryo and the real-time measurement data measured by the detector to obtain the radius of each position point of the embryo, calculating the deviation between the radii of each position point, namely the out-of-roundness of the embryo, calculating the mean value of the radii of each position point, namely the average radius, and calculating to obtain the perimeter of the embryo based on the average radius. The invention realizes the online out-of-roundness detection of the formed tire blank, the detection result at the stage is related to the detection result data after vulcanization, the prevention can be realized in advance, the defective products after vulcanization are avoided, and the defective rate is reduced.
Description
Technical Field
The invention belongs to the technical field of tire blank out-of-roundness detection, and particularly relates to an on-line tire blank out-of-roundness detection method and an on-line tire blank out-of-roundness detection device of a tire building machine.
Background
The dynamic balance and uniformity of the tires are main influence factors for whether the automobile runs stably, and poor tires can cause the riding comfort of the automobile to be reduced, and the driving safety can be endangered in serious cases. With the increasing market competition and the increasingly strict tire quality standards, various large tire manufacturers compete to improve the tire quality through a series of technical means, the improvement of the dynamic balance and uniformity of the tire is an important part for improving the performance of the tire, and the improvement of the dynamic uniformity performance is a main focus in the future of the tire industry. The problems of the existing tire are mainly as follows: firstly, a finished tire needs to be detected by a dynamic balance and uniformity measuring machine, and the previous process is investigated and improved when the finished tire is found to be unqualified, so that the inspection and adjustment work has hysteresis, and the advanced prevention cannot be realized; secondly, measuring the non-roundness of the green tyre at the current stage, measuring the whole circumference of the green tyre by using a measuring tape, wherein the measuring time is long and the data error is large, so that the problem is not easy to solve in time; and thirdly, the method for repairing the problems after work is lack, the problems can be found only according to experience, and the equipment is shut down, checked and adjusted, so that a large amount of time is wasted, and the productivity is influenced.
The invention is provided to solve the above problems.
Disclosure of Invention
In order to solve the above-mentioned problems, an on-line tire out-of-roundness detection method and an on-line tire out-of-roundness detection device for a tire building machine have been proposed. In order to achieve the purpose, the invention provides the following technical scheme:
an on-line detection method for tire blank out-of-roundness of a tire building machine comprises the following steps:
(1) after a tire blank is formed on a forming drum of a tire forming machine, rotating the forming drum, measuring the distance from a detector to the tire blank in real time by adopting the detector, and recording real-time measurement data measured by the detector and a square point corresponding to the real-time measurement data;
(2) calculating the difference value between the distance from the detector to the center of the embryo and the real-time measurement data measured by the detector to obtain the radius of each position point of the embryo, calculating the deviation between the radii of each position point, namely the out-of-roundness of the embryo, calculating the mean value of the radii of each position point, namely the average radius, and calculating to obtain the perimeter of the embryo based on the average radius.
Preferably, the real-time measurement data and the orientation point in step (1) are associated by recording a rotation angle of a spindle of the tire building machine by an encoder provided at a spindle end of the spindle of the tire building machine, calculating a radius based on the rotation angle of the spindle recorded in step (1) and the corresponding rotation angle of the spindle in step (2), and drawing a curve with the rotation angle of the spindle and the radius of the green tire as horizontal and vertical coordinates.
Preferably, the tire blank zero degree corresponds to a spindle zero point of a spindle of the tire building machine, the angle of each claw block in the tire crown transfer ring clamping claw of the tire building machine corresponds to the tire blank angle, and the angle corresponding to each claw block in the tire crown transfer ring clamping claw is calculated and obtained based on the spindle rotation angle and the tire blank radius obtained by the spindle rotation angle.
Preferably, based on the graph, the positions of the claw blocks of the tire crown transfer ring clamping claw corresponding to the positions of the tire blank out-of-roundness at high and low positions can be obtained, the claw blocks of the tire crown transfer ring clamping claw are adjusted according to the positions of the tire blank out-of-roundness at high and low positions, and after the adjustment is finished, the out-of-roundness of the tire blank is detected again until the out-of-roundness of the tire blank meets the production requirement.
Preferably, the tire out-of-roundness obtained in the step (2) is respectively compared with a preset alarm value and a preset shutdown alarm value, when the tire out-of-roundness exceeds the preset alarm value, the alarm gives an alarm that the tire out-of-roundness exceeds the preset alarm value, and when the tire out-of-roundness exceeds the preset shutdown alarm value, the alarm gives an alarm that the tire out-of-roundness exceeds the preset shutdown alarm value.
Preferably, the detector in the step (1) is a laser detector, and when the laser detector measures the distance from the laser detector to the green tire in real time, the straight line where the laser emitted by the laser detector is located is perpendicular to the central axis of the green tire and intersects with the central axis of the green tire.
The detection device of the tire blank out-of-roundness on-line detection method based on the tire building machine comprises a laser detector and a controller, wherein the laser detector is arranged on a crown transfer ring of the tire building machine and used for detecting the distance from the laser detector to a tire blank on a building drum of the tire building machine, the laser detector is in communication connection with the controller, and the controller comprises a data collector used for collecting data detected by the laser detector, a data processor used for processing the data collected by the data collector and a display used for displaying the data processed by the data processor.
Preferably, the device further comprises an alarm, the alarm is in communication connection with the controller, the data processor compares the tire out-of-roundness obtained by processing of the data processor with a preset alarm value, and the controller controls the alarm to give an alarm when the out-of-roundness of the tire exceeds the preset alarm value.
Preferably, the alarm sets up to 2, 2 alarms all with the controller communication is connected, and data processor compares the child embryo out-of-roundness that data processor handled the acquisition with preset alarm value and preset shut down alarm value, and when child embryo out-of-roundness exceeded preset alarm value, one of them alarm of controller control sent out the police dispatch newspaper, when child embryo out-of-roundness exceeded preset shut down alarm value, two alarms of controller control sent out the police dispatch newspaper simultaneously.
Preferably, the tire forming machine further comprises an encoder, the encoder is arranged at the shaft end of the main shaft of the tire forming machine and used for detecting the rotation angle of the main shaft of the tire forming machine, the encoder is in communication connection with the controller, and the zero position of the main shaft of the tire forming machine corresponds to the zero degree of the tire blank.
Has the advantages that:
1. the invention realizes the online out-of-roundness detection of the formed tire blank, the detection result at the stage is related to the detection result data after vulcanization, the prevention can be realized in advance, the defective products after vulcanization are avoided, and the defective rate is reduced.
2. The invention can intelligently analyze the out-of-roundness data of the tire, can obtain the deviation of the forming machine, realizes the timely adjustment of the tire forming machine equipment, avoids the occurrence of poor batch and improves the product quality.
3. The repeatability precision of the measurement data of the laser detector adopted by the invention can reach 0.01mm, the measurement data is accurate, the detection time is short, and the method is convenient and quick.
4. The method is characterized in that an encoder is installed on a main shaft of the forming machine, the position of the main shaft of the forming machine is measured in real time, tire out-of-roundness data corresponds to the position of the main shaft of the forming machine, correlation exists between the tire out-of-roundness and the concentricity of a tire crown transfer ring clamping jaw, through online detection, data and graph analysis, the out-of-roundness data of the tire in a graph corresponds to the position of the tire crown transfer ring clamping jaw, the position of a jaw block of the tire crown transfer ring clamping jaw corresponding to the out-of-roundness height of the tire can be determined through the graph, the problem point of the tire of the forming machine can be identified quickly, the defect can be identified on site.
5. The on-line detection method and the detection device can realize the on-line measurement of the perimeter of the embryo and reduce the manual measurement time.
6. The on-line detection device is provided with 2 alarms, when the out-of-roundness of the tire blank exceeds a preset alarm value, the controller controls one alarm to give an alarm, and when the out-of-roundness of the tire blank exceeds a preset shutdown alarm value, the controller controls the two alarms to give alarms simultaneously, so that the on-site timely identification and improvement are facilitated, the defective rate of the tire is reduced, and the quality of the tire is improved.
7. The online detection device has the advantages of simple structure, low investment cost and low transformation difficulty.
8. The tire blank out-of-roundness is correlated with the finished product out-of-roundness, the out-of-roundness of the finished product can be prevented in advance by detecting the out-of-roundness of the tire blank, and the quality of the product is improved.
Drawings
Fig. 1 is a schematic front view of the device for detecting the out-of-roundness of the tire blank of the tire building machine according to the present invention.
FIG. 2 is a schematic side view of the device for on-line detection of tire blank out-of-roundness of a tire building machine according to the present invention.
FIG. 3 is a diagram of the accuracy verification of the on-line device for detecting the out-of-roundness of the tire blank of the tire building machine according to the present invention.
FIG. 4 is a diagram of the variation components of the tire blank and the tire blank out-of-roundness on-line measuring device for the tire building machine according to the present invention.
FIG. 5 is a data diagram of the device for on-line detecting the tire blank out-of-roundness of the tire blank of the tire building machine of the present invention.
FIG. 6 is a control diagram of the on-line device for detecting the tire blank out-of-roundness of the tire blank of the tire building machine according to the present invention.
FIG. 7 is an X-Bar control chart of the device for detecting the tire blank out-of-roundness of the tire blank on-line used for the tire building machine.
FIG. 8 is a diagram showing the results of the measurement of the unroundness of the green tire.
FIG. 9 is a graph showing the results of the roundness detection of the first green tire.
FIG. 10 is a graph showing the results of measuring the out-of-roundness of the second green tire.
FIG. 11 is a normal distribution diagram of the variation of the out-of-roundness of the tire before and after the adjustment of the positions of the gripper blocks of the gripping grippers of the crown transfer ring.
FIG. 12 is a normal distribution diagram of the variation of the out-of-roundness of the finished tire before and after adjusting the positions of the gripper blocks of the gripping grippers of the crown transfer ring.
FIG. 13 is a normal distribution diagram of uniformity RFV variations before and after adjustment of the gripper block positions of the crown transfer ring grippers.
In the figure: the method comprises the following steps of 1-tire crown transfer ring, 2-main shaft, 3-tire blank, 4-laser detector, 5-alarm, 6-tire crown transfer ring clamping claw, 7-controller, 8-encoder and 9-forming drum.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application.
Example 1
The main reason for poor uniformity of the tire is tire run-out, so that monitoring of tire blank out-of-roundness from a forming stage in advance is an effective means, problems can be found and solved in time, and the quality of the tire is improved.
The specific embodiment provides an online detection method for tire blank out-of-roundness of a tire building machine, which specifically comprises the following steps:
(1) after a green tire is formed on a forming drum of a tire forming machine, a crown transfer ring of the tire forming machine moves the forming drum, the forming drum is rotated, a laser detector is adopted to measure the distance from the laser detector to the green tire in real time, real-time measurement data measured by the laser detector and a square point corresponding to the real-time measurement data are recorded, the real-time measurement data and the square point correspond to each other in a mode that a rotating angle of a main shaft of the tire forming machine is recorded through an encoder arranged at the shaft end of the main shaft of the tire forming machine, and when the laser detector measures the distance from the laser detector to the green tire in real time, a straight line where laser emitted by the laser detector is perpendicular to the central axis of.
(2) Calculating the difference value between the distance from the laser detector to the center of the embryo and real-time measurement data measured by the laser detector to obtain the radius of each position point of the embryo, calculating the deviation between the radii of each position point to obtain the out-of-roundness of the embryo, calculating the mean value of the radii of each position point to obtain the average radius, calculating the circumference of the embryo based on the average radius, calculating the radius based on the recorded main shaft rotation angle and the corresponding main shaft rotation angle, and taking the rotation angle of the main shaft and the radius of the embryo as horizontal and vertical coordinates to make a curve graph and an expanded roundness graph of the embryo (the curve graph and the expanded roundness graph of the embryo can respectively show the result or show the result in a matching manner, the curve graph can more accurately judge the high and low points of the embryo, the expanded roundness graph more vividly shows the out-of-roundness information of the embryo, and the expanded roundness.
(3) And (3) comparing the tire out-of-roundness obtained in the step (2) with a preset alarm value and a preset shutdown alarm value respectively, wherein when the tire out-of-roundness exceeds the preset alarm value, the alarm gives an alarm that the tire out-of-roundness exceeds the preset alarm value, and when the tire out-of-roundness exceeds the preset shutdown alarm value, the alarm gives an alarm that the tire out-of-roundness exceeds the preset shutdown alarm value.
(4) The tire blank zero degree corresponds to a spindle zero point of a spindle of a tire forming machine, the angle of each claw block in a tire crown transfer ring clamping claw of the tire forming machine corresponds to the tire blank angle, and the angle corresponding to each claw block in the tire crown transfer ring clamping claw is calculated and obtained based on the spindle rotation angle and the tire blank radius obtained by the spindle rotation angle.
(5) Based on the graph or the expanded tire blank roundness diagram, the positions of the claw blocks of the tire crown transfer ring clamping claws corresponding to the positions of the high and low positions of the tire blank out-of-roundness can be obtained, the claw blocks of the tire crown transfer ring clamping claws are adjusted according to the positions of the high and low positions of the tire blank out-of-roundness, and after the adjustment is finished, the out-of-roundness of the tire blank is detected again until the out-of-roundness of the tire blank meets the production requirement.
The method realizes the on-line non-roundness detection of the formed tire blank, can immediately send an alarm to the tire blank which does not meet the non-roundness requirement of the tire blank, timely reminds managers, reduces the defective rate of the tire blank, improves the quality of the tire, makes curve curves through the non-roundness detection data of the tire blank, can visually and vividly analyze the position of the claw block of the tire crown transfer ring clamping claw corresponding to the non-roundness height of the tire blank, quickly identifies the problem point of the tire of the forming machine, is beneficial to identifying the defect on site, quickly correcting the defect, timely tracking the result and is convenient for improving the site.
Example 2
As shown in fig. 1 and 2, in this embodiment, an on-line tire blank 3 out-of-roundness detection device of a tire building machine designed based on the on-line tire blank 3 out-of-roundness detection method of the tire building machine of embodiment 1 is provided, the on-line detection device includes a laser detector 4, 2 alarms 5, an encoder 8 and a controller 7, the laser detector 4 is disposed on a side surface of a crown transfer ring 1 of the tire building machine and is used for detecting a distance from the laser detector 4 to a tire blank 3 on a building drum 9 of the tire building machine, when the laser detector 4 measures the distance from the laser detector 4 to the tire blank 3, the crown transfer ring 1 of the tire building machine moves the building drum 9, laser emitted by the laser detector 4 is perpendicular to a central axis of the tire blank 3, and the laser detector 4 is in communication connection with the controller 7.
The controller 7 comprises a data collector for collecting data detected by the laser detector 4, a data processor for processing the data collected by the data collector, and a display for displaying the data processed by the data processor.
The 2 alarms 5 are all in communication connection with the controller 7, the data processor compares the out-of-roundness of the tire blank 3 obtained by the data processor with a preset alarm value and a preset shutdown alarm value, when the out-of-roundness of the tire blank 3 exceeds the preset alarm value, the controller 7 controls one of the alarms 5 to give an alarm, when the out-of-roundness of the tire blank 3 exceeds the preset shutdown alarm value, the controller 7 controls the two alarms 5 to give an alarm at the same time, the controller 7 is in communication connection with a control system of the tire forming machine, when the out-of-roundness of the tire blank 3 exceeds the preset shutdown alarm value, the controller 7 controls the two alarms 5 to give an alarm at the same time and give a signal to the control system of the tire forming machine, so that the control system of the tire forming machine controls the tire forming machine to be shut down, inspection by managers is facilitated, and the defective rate of.
The encoder 8 is arranged at the shaft end of the main shaft 2 of the tire building machine and used for detecting the rotation angle of the main shaft 2 of the tire building machine, the encoder 8 is in communication connection with the controller 7, the zero position of the main shaft 2 of the tire building machine corresponds to the zero degree of the tire blank 3, the angle of each claw block in the tire crown transfer ring clamping claw 6 of the tire building machine corresponds to the angle of the tire blank 3, based on the data result processed by the data processor displayed by the display, the data processor makes a curve diagram of the processed data by taking the rotation angle of the main shaft 2 and the radius of the tire blank 3 as horizontal and vertical coordinates and an expanded roundness diagram of the tire blank 3, the positions of the tire crown blocks of the tire crown transfer ring clamping claw 6 corresponding to the positions of the, and detecting the out-of-roundness of the blank 3 again until the out-of-roundness of the blank 3 meets the production requirement. The device can quickly identify the problem points of the tire of the forming machine, is beneficial to identifying badness on site, quickly correcting badness, tracking the result in time and facilitating on-site improvement.
When the on-line detection device for the out-of-roundness of the tire blank 3 is used, after the tire blank 3 is formed on a forming drum 9 of a tire forming machine, a tire crown transfer ring 1 of the tire forming machine moves to the position of the forming drum 9, moves to the position where a laser detector 4 is arranged above the tire blank 3, a straight line where the laser detector 4 emits laser is perpendicular to a central axis of the tire blank 3 and intersects with the central axis of the tire blank 3, the forming drum 9 is rotated to detect the out-of-roundness of the tire blank 3, a detection result is displayed on a display, the out-of-roundness of the tire blank 3 and the positions of claw blocks of a tire crown transfer ring clamping claw 6 corresponding to the positions of the out-of-roundness high and low positions of the tire blank 3 are read according to the display result, the claw blocks of the tire crown transfer ring clamping claw 6 are adjusted according to the positions of the out-of-roundness of the tire blank 3, and.
Example 3 verification of correlation between radial force for uniformity of finished tire and tire out-of-roundness of tire blank
The verification of the correlation between the uniformity radial force and the out-of-roundness of the finished tire shows that the out-of-roundness of the finished tire has significant correlation (p is 0.000 and less than 0.05) with the uniformity radial force, which shows that the out-of-roundness of the finished tire has significant correlation with the radial force.
The verification of the correlation between the tire blank out-of-roundness and the finished tire out-of-roundness shows that the correlation between the tire blank out-of-roundness and the finished tire out-of-roundness is significant (p is 0.044 and is less than 0.05), and the reduction of the tire blank out-of-roundness can effectively reduce the radial force value of the tire uniformity and the out-of-roundness value of the finished tire.
Example 4 on-line detection device for tire blank out-of-roundness accuracy verification
The verification method is to use the tire blank out-of-roundness online detection device of the tire building machine in the embodiment 2 to perform bias study on the out-of-roundness of the standard ring repeatedly for more than 30 times, in the embodiment, the standard ring adopts the main shaft of the building drum, the reference value of the standard ring is 0.1mm, and the out-of-roundness of the standard ring is repeatedly measured for 103 times, and the result is shown in fig. 3, the mean value of the bias of the out-of-roundness of the main shaft of the building drum is 0.0005825 < 0.1, and P is 0.057 > 0.05 (the smaller the P value is, the more significant the result is represented), and no significant difference exists, which indicates that the detection result of the tire blank out-of-roundness online detection device is accurate and the accuracy is credible.
Example 5 precision verification of on-line detection device for tire blank out-of-roundness
10 pieces of green tires were selected and continuously measured 10 times by using the on-line green tire out-of-roundness measuring apparatus of the tire building machine of example 2, and then subjected to R & R (repeatability and reproducibility) analysis (crossing) by a measuring tool, and as a result, as shown in fig. 4 to 7, the variance component of the measuring tool R & R was 0.0001654, the variance component between the parts (green tires) was 0.0321411, and the contribution rate of the variance component of the measuring tool R & R was 0.51% < 9%, which was acceptable; the standard deviation of the measuring tool R & R is 0.012863, the standard deviation between the embryos is 0.179279, and the research variation percentage of the measuring tool R & R is 7.16% < 30%, which is acceptable; the number of distinguishable classes is 19 > 5, indicating that the measurement system has sufficient resolution to be usable. Therefore, the online detection device for the out-of-roundness of the tire blank has higher precision.
Example 6 evaluation of the conformity between the degree of non-circularity of a green tire and the degree of non-circularity of a finished tire
The evaluation method was to detect the out-of-roundness of the green tire using the on-line device for detecting out-of-roundness of the green tire of the tire building machine of example 2, and to detect out-of-roundness of the finished tire made from the green tire using a dial gauge.
The results of the tire out-of-roundness detection of the tire blank are shown in fig. 8, and show that the low out-of-roundness point of the tire blank is located at 260 degrees of 210-.
Furthermore, the tire blank zero degree corresponds to the spindle zero point of the spindle of the tire forming machine, the angle of each claw block in the tire crown transfer ring clamping claw of the tire forming machine corresponds to the tire blank angle, and the arrangement can vividly describe the out-of-roundness image of the whole circumference of the tire blank, is favorable for quickly positioning the out-of-roundness position of the tire blank and is favorable for finding problems.
Example 7 crown transfer Ring gripper position adjustment verification
The method for verifying the non-circularity of the tire blanks comprises the steps of detecting the non-circularity of a plurality of tire blanks by using the online tire blank non-circularity detection device of the tire building machine in embodiment 2, judging the positions of claw blocks of the clamping claws of the tire crown transfer ring corresponding to the non-circularity height of the tire blanks by analyzing data and images, adjusting the clamping claw distances of the corresponding tire crown transfer ring according to the positions of the height points, detecting the non-circularity of the tire blanks again, and comparing the non-circularity data of the tire blanks detected twice before and after.
As a result, as shown in fig. 9 to 10, it can be seen from fig. 9 and 10 that the out-of-roundness levels of the two tire blanks are the same, the claw positions of the crown transfer ring grippers corresponding to the out-of-roundness levels of the tire blanks are No. 1 to 2 and No. 4 to 5, and the out-of-roundness of the tire blanks is detected again after the adjustment of the No. 1 to 2 and No. 4 to 5 claw blocks, and as a result, as shown in fig. 11 to 13, it can be seen from fig. 11 that the mean value of the out-of-roundness of the tire blanks before and after the adjustment is reduced from 1.42 to 1.23 and from 0.19mm, as shown in fig. 12, the mean value of the out-of-roundness of-tires before and after the adjustment is reduced from 1.00 to 0.93 and from 0.07mm, and as can be seen from fig. 13, the mean value of the uniformity RFV before and after the adjustment is reduced from 591.8N to 495.3. Therefore, the tire blank can accurately obtain the out-of-roundness information of the tire blank through the online detection, data and graphic analysis of the on-line detection device for the out-of-roundness of the tire blank, the positions of the claw blocks of the tire crown transfer ring clamping claws corresponding to the high and low points of the out-of-roundness of the tire blank can be determined, the problem points of the tire of the forming machine can be quickly identified, the defects can be favorably identified on site, quickly corrected, the result can be timely tracked, and the on-site improvement is facilitated.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. An on-line detection method for tire blank out-of-roundness of a tire building machine is characterized by comprising the following steps:
(1) after a tire blank is formed on a forming drum of a tire forming machine, rotating the forming drum, measuring the distance from a detector to the tire blank in real time by adopting the detector, and recording real-time measurement data measured by the detector and a square point corresponding to the real-time measurement data;
(2) calculating the difference value between the distance from the detector to the center of the embryo and the real-time measurement data measured by the detector to obtain the radius of each position point of the embryo, calculating the deviation between the radii of each position point, namely the out-of-roundness of the embryo, calculating the mean value of the radii of each position point, namely the average radius, and calculating to obtain the perimeter of the embryo based on the average radius.
2. The method for detecting out-of-roundness of tire blanks on-line in a tire building machine according to claim 1, wherein the real-time measurement data in step (1) is associated with the orientation point by recording the rotation angle of the spindle of the tire building machine by an encoder provided at the spindle end of the spindle of the tire building machine, and plotting the rotation angle of the spindle and the tire blank radius as horizontal and vertical coordinates based on the rotation angle of the spindle recorded in step (1) and the radius calculated from the rotation angle of the spindle corresponding to the rotation angle of the spindle in step (2).
3. The method as claimed in claim 2, wherein the tire blank zero degree corresponds to a spindle zero point of a spindle of the tire building machine, the angle of each claw block in the crown transfer ring gripper of the tire building machine corresponds to the tire blank angle, and the angle corresponding to each claw block in the crown transfer ring gripper is calculated and obtained based on the spindle rotation angle and the tire blank radius obtained from the corresponding spindle rotation angle.
4. The on-line tire blank out-of-roundness detection method for the tire building machine according to claim 3, wherein based on the graph, the positions of the claw blocks of the tire crown transfer ring gripper claws corresponding to the positions of the high and low out-of-roundness of the tire blank are obtained, the claw blocks of the tire crown transfer ring gripper claws are adjusted according to the positions of the high and low out-of-roundness of the tire blank, and after the adjustment is completed, the out-of-roundness of the tire blank is detected again until the out-of-roundness of the tire blank meets the production requirements.
5. The method for detecting the out-of-roundness of the tire blank of the tire building machine according to claim 1, wherein the out-of-roundness of the tire blank obtained in the step (2) is compared with a preset alarm value and a preset shutdown alarm value, respectively, and when the out-of-roundness of the tire blank exceeds the preset alarm value, the alarm gives an alarm that the out-of-roundness of the tire blank exceeds the preset alarm value, and when the out-of-roundness of the tire blank exceeds the preset shutdown alarm value, the alarm gives an alarm that the out-of-roundness of the tire blank exceeds the preset shutdown alarm value.
6. The on-line tire blank out-of-roundness detection method of a tire building machine according to claim 1, wherein the detector in step (1) is a laser detector, and when the laser detector measures the distance from the laser detector to the tire blank in real time, the straight line where the laser detector emits the laser is perpendicular to and intersects the central axis of the tire blank.
7. The on-line tire out-of-roundness detection device of the tire building machine according to the on-line tire out-of-roundness detection method of the tire building machine of any one of claims 1 to 6, comprising a laser detector and a controller, wherein the laser detector is arranged on a crown transfer ring of the tire building machine and used for detecting the distance from the laser detector to the tire on a building drum of the tire building machine, the laser detector is in communication connection with the controller, and the controller comprises a data collector for collecting data detected by the laser detector, a data processor for processing the data collected by the data collector, and a display for displaying the data processed by the data processor.
8. The device for on-line detection of the out-of-roundness of the green tire of a tire building machine according to claim 7, further comprising an alarm, wherein the alarm is in communication connection with the controller, the data processor compares the out-of-roundness of the green tire obtained by the data processor with a preset alarm value, and the controller controls the alarm to give an alarm when the out-of-roundness of the green tire exceeds the preset alarm value.
9. The device for on-line detection of the out-of-roundness of the green tire of a tire building machine according to claim 8, wherein the number of the alarm devices is 2, 2 alarm devices are in communication connection with the controller, the data processor compares the out-of-roundness of the green tire obtained by the processing of the data processor with a preset alarm value and a preset shutdown alarm value, when the out-of-roundness of the green tire exceeds the preset alarm value, the controller controls one of the alarm devices to give an alarm, and when the out-of-roundness of the green tire exceeds the preset shutdown alarm value, the controller controls the two alarm devices to give an alarm at the same time.
10. The device of claim 7, further comprising an encoder disposed at a shaft end of the spindle of the tire building machine for detecting a rotation angle of the spindle of the tire building machine, wherein the encoder is in communication with the controller, and a zero position of the spindle of the tire building machine corresponds to a zero degree of the tire.
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| CN112798182A (en) * | 2020-12-17 | 2021-05-14 | 中策橡胶集团有限公司 | Method for improving unbalance of tire and tire obtained by method |
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| CN111998792B (en) | 2022-08-26 |
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