Method, device and system for automatically removing marking marks on tread

Abstract

The invention relates to the technical field of tire manufacturing and processing, in particular to a method, a device and a system for automatically removing marking marks on a tread, and the device comprises a rack, a conveying belt, a detecting assembly and a removing assembly. The detection assembly comprises a laser scanner and an image processing module and is used for efficiently and accurately detecting the marking mark position of the tire tread; the removing assembly comprises an electric driving unit and a removing head and is used for precisely cutting marking marks, meanwhile, a dust suction device is arranged for collecting waste, and environment pollution is avoided. The tire removing device can improve the removing efficiency and precision, reduce the manual labor intensity and avoid damage to the surface of the tire.

Description

Technical Field

[0001] The invention belongs to the technical field of tire manufacturing, and in particular relates to a method, a device and a system for automatically removing tread marking marks. Background Art

[0002] In the tire production process, tread marking is a very important part, which is used to identify the tire model, production date and other information. Existing tread marking methods usually print the logo on the tread by mechanical or inkjet methods. However, these methods have some significant problems in practical applications. First, mechanical marking can easily leave deep marks on the tread, which not only affects the appearance of the tire, but may also cause tread damage, affecting the performance and life of the tire. Secondly, although inkjet marking causes less damage to the tread, the ink may easily fade or fall off under certain conditions, affecting the durability and readability of the mark. In addition, the existing marking equipment lacks an effective mark recognition and rejection mechanism, and cannot detect and reject unqualified treads in time after marking, resulting in difficulties in product quality control. Therefore, it is of great practical significance and application value to develop a tread marking system that can automatically identify and reject marking marks. Summary of the invention

[0003] The purpose of the present invention is to provide a method, device and system for automatically removing tread marking marks, so as to solve the problems existing in the prior art that the marking marks on the tire tread cannot be efficiently and accurately identified and removed, and the tire surface is easily damaged during the removal process.

[0004] To achieve the above object, the present invention provides the following technical solutions: a method, device and system for automatically removing tread marking marks, comprising a frame, a conveyor belt and a removal component, wherein the conveyor belt is installed on the frame, a detection component is provided on one side of the conveyor belt, a removal component is provided on the other side of the conveyor belt, and a controller is fixedly installed on the top of the frame;

[0005] The detection component includes a laser scanner, which is fixedly installed on one side of the conveyor belt. An image processing module is fixedly installed below the laser scanner. The image processing module is used to process image information collected by the laser scanner. The image processing module is connected to the controller via a data cable.

[0006] The rejecting assembly comprises an electric drive unit and a rejecting head. The electric drive unit is fixedly mounted on a frame, and the rejecting head is fixedly mounted on an output end of the electric drive unit. The electric drive unit is connected to a controller via a control line.

[0007] Preferably, baffles are fixedly installed on both sides of the conveyor belt, and the baffles are used to prevent the tire from deviating from the track during the conveying process;

[0008] Preferably, the scanning area of ​​the laser scanner covers the entire width of the conveyor belt, ensuring that the marking marks on the tire tread can be fully detected;

[0009] Preferably, the image processing module includes an image preprocessing unit, a feature extraction unit and a positioning unit;

[0010] The image preprocessing unit is used to remove noise from the image and perform normalization processing on the image;

[0011] The feature extraction unit is used to extract the marking mark features in the image, including but not limited to edges, contours and colors;

[0012] The positioning unit is used to determine the precise position of the marking mark on the conveyor belt according to the features extracted by the feature extraction unit.

[0013] Preferably, the removal head comprises a rotating blade, the edge of the rotating blade is ground with a sharp edge for accurately cutting the marking mark of the tread, and the rotation speed and position of the rotating blade are controlled by an electric drive unit;

[0014] Preferably, the rejecting assembly further comprises a dust collecting device, which is fixedly mounted below the rejecting head and is used to collect waste generated during the rejecting process to prevent the waste from polluting the environment;

[0015] Preferably, the electric drive unit comprises a stepper motor and a reducer, the output shaft of the stepper motor is connected to the rotating blade of the rejecting head through the reducer, and the operation of the stepper motor is controlled by a controller.

[0016] A method for automatically removing tread marking marks comprises the following steps:

[0017] S1. Place the tire to be processed on a conveyor belt, and the conveyor belt guides the tire along a predetermined path through a baffle;

[0018] S2, the laser scanner scans the tire tread, collects the image information of the tire tread, and transmits the image information to the image processing module;

[0019] S3, the image processing module pre-processes the image, removes noise and normalizes it, then extracts the characteristic information of the marking mark and determines the precise position of the marking mark on the tire tread;

[0020] S4, the controller controls the electric drive unit to drive the rejection head to move to the position of the marking mark according to the position information provided by the image processing module, and starts the rotating blade for precise cutting;

[0021] S5. The dust collection device collects the waste generated during the removal process to prevent the waste from polluting the environment;

[0022] S6: The tire continues to move along the conveyor belt, and the above process is repeated until all marking marks on the tire tread are removed.

[0023] A tread marking mark automatic removal system, comprising a conveying module, a detection module, a control module and a removal module;

[0024] The conveying module is used to convey the tire to ensure that the tire moves along a predetermined path;

[0025] The detection module includes a laser scanner and an image processing module, which are used to detect the marking marks on the tire tread and determine their positions;

[0026] The control module is used to control the operation of the rejection module according to the information provided by the detection module;

[0027] The rejection module includes an electric drive unit and a rejection head, which are used to accurately remove the marking marks on the tire tread.

[0028] The image processing module includes an image preprocessing unit, a feature extraction unit and a positioning unit;

[0029] The image preprocessing unit is used to remove noise from the image and perform normalization processing on the image;

[0030] The feature extraction unit is used to extract the marking mark features in the image, including but not limited to edges, contours and colors;

[0031] The positioning unit is used to determine the precise position of the marking mark on the conveyor belt according to the features extracted by the feature extraction unit.

[0032] The rejection module also includes a dust suction device for collecting waste generated during the rejection process to prevent the waste from polluting the environment.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. In the present invention, through the combination of laser scanner and image processing module, the marking mark position on the tire tread can be detected efficiently and accurately, and accurate removal instructions can be provided to ensure the accuracy and efficiency of the removal process, thereby avoiding the error and labor intensity of traditional manual removal.

[0035] 2. In the present invention, the removal head adopts a rotating blade with a sharp edge, which can accurately cut the marking mark. At the same time, the electric drive unit accurately controls the position and rotation speed of the blade to ensure the stability and accuracy of the removal process and avoid damage to the tire surface.

[0036] 3. In the present invention, a dust suction device is added, which can effectively collect the waste generated in the removal process, avoid the waste from scattering and polluting the environment, improve the cleanliness of the working environment, and also help to extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the three-dimensional structure of a device for automatically removing tread marking marks according to the present invention;

[0038] Figure 2 It is a schematic diagram of the structure of the laser scanner in the present invention;

[0039] Figure 3 It is a structural schematic diagram of the image processing module in the present invention;

[0040] Figure 4 It is a structural schematic diagram of the electric drive unit in the present invention;

[0041] Figure 5 It is a schematic structural diagram of a removal head of a tread marking mark automatic removal device of the present invention;

[0042] Figure 6 The present invention is a block diagram of a system for automatically removing tread marking marks. DETAILED DESCRIPTION

[0043] The present invention provides a method, device and system for automatically removing tread marking marks, aiming to solve the problem that the prior art cannot efficiently and accurately identify and remove the marking marks on the tire tread, and the tire surface is easily damaged during the removal process. Figure 1 To Attachment Figure 6 , the specific implementation methods of the present invention are described in detail.

[0044] Figure 1 The present invention is a schematic diagram of the three-dimensional structure of a device for automatically removing tread marking marks. Figure 2 It is a schematic diagram of the structure of the laser scanner in the present invention. Figure 3 It is a structural schematic diagram of the image processing module in the present invention. Figure 4 It is a schematic diagram of the structure of the electric drive unit in the present invention. Figure 5 The present invention is a schematic diagram of the structure of a removal head of an automatic removal device for tread marking marks. Figure 6 The present invention is a block diagram of a system for automatically removing tread marking marks.

[0045] The automatic removal device for tread marking marks of the present invention mainly consists of a frame 1, a conveyor belt 2, a detection component and a removal component. The conveyor belt 2 is installed on the frame 1 to convey the tire to be processed. A detection component is arranged on one side of the conveyor belt 2, and a removal component is arranged on the other side. A controller 3 is fixedly installed on the top of the frame 1 to control the operation of the entire device.

[0046] The detection component includes a laser scanner 4 and an image processing module 5. The laser scanner 4 is fixedly installed on one side of the conveyor belt 2, and its scanning area covers the entire width of the conveyor belt 2, ensuring that the marking marks on the tire tread 100 can be fully detected. An image processing module 5 is fixedly installed below the laser scanner 4, and the module is used to process the image information collected by the laser scanner 4. The image processing module 5 is connected to the controller 3 through a data line to transmit the processed image information.

[0047] The working principle of the laser scanner 4 is as follows: when the tire 100 moves along the conveyor belt 2, the laser scanner 4 scans the tire tread 100 and collects high-resolution image information. The scanner 4 adopts a line scanning mode with a scanning frequency of 1000 times per second to ensure the continuity and integrity of the image information. The scanning data of the laser scanner 4 is transmitted to the image processing module 5 through the data line for further processing.

[0048] The image processing module 5 includes an image preprocessing unit 51, a feature extraction unit 52 and a positioning unit 53. The image preprocessing unit 51 is used to remove noise from the image and normalize the image to improve the image quality. The specific preprocessing steps include: first, using a Gaussian filter to smooth the image and filter out noise; second, graying the image to convert the color image into a grayscale image; finally, normalizing the grayscale image to adjust the brightness range of the image to between 0 and 255 to enhance the contrast of the image.

[0049] The feature extraction unit 52 is used to extract the marking mark features in the image. The marking mark features mainly include edge, contour and color. The feature extraction unit 52 first uses an edge detection algorithm (such as the Canny edge detection algorithm) to extract edge information in the image, and then uses a contour detection algorithm (such as a boundary tracking algorithm) to extract the contour information of the marking mark. The specific color feature extraction method is to convert the image into the HSV color space, perform color threshold segmentation using the difference in color between the marking mark and the tire tread 100, and extract the color features of the marking mark.

[0050] The positioning unit 53 determines the precise position of the marking mark on the tire tread 100 according to the features extracted by the feature extraction unit 52. The specific positioning method includes: first, fitting the contour of the marking mark using the least square method to determine its geometric center; second, calculating the precise position of the marking mark relative to the conveyor belt 2 according to the position of the geometric center, combined with the movement speed of the conveyor belt 2 and the scanning frequency of the laser scanner 4; finally, transmitting the positioning information to the controller 3 through the data line.

[0051] After receiving the positioning information, the controller 3 controls the electric drive unit 6 to drive the rejection head 7 to move to the position of the marking mark according to the information, and starts the rotating blade 71 for precise cutting. The specific control process is as follows: the controller 3 first calculates the movement path and speed of the rejection head 7 according to the positioning information, and then sends instructions to the electric drive unit 6 through the control line. The electric drive unit 6 includes a stepper motor 61 and a reducer 62. The output shaft of the stepper motor 61 is connected to the rotating blade 71 of the rejection head 7 through the reducer 62 to ensure the precise control of the rotating blade 71. The running speed and position of the stepper motor 61 are adjusted in real time by the controller 3 to ensure that the rejection head 7 can accurately move to the position of the marking mark.

[0052] The removal head 7 includes a rotating blade 71, the edge of which is ground with a sharp edge for accurately cutting the marking mark on the tire tread 100. The rotation speed and position of the rotating blade 71 are controlled by the stepper motor 61 and the reducer 62 of the electric drive unit 6. The rotation speed of the stepper motor 61 can be adjusted by the pulse frequency, and the rotation position can be accurately controlled by the number of pulses and the step angle of the motor. For example, when the marking mark to be removed is large or deep, the controller 3 increases the rotation speed and pulse number of the stepper motor 61 so that the rotating blade 71 can quickly and accurately cut off the mark.

[0053] The rejecting assembly also includes a dust suction device 8, which is fixedly installed below the rejecting head 7 and is used to collect waste generated during the rejecting process to prevent the waste from polluting the environment. The dust suction device 8 includes a dust suction nozzle 81 and a dust collection box 82. The dust suction nozzle 81 is fixedly installed below the rotating blade 71 and moves synchronously with the rotating blade 71. During the rejecting process, the dust suction nozzle 81 sucks the generated waste into the dust collection box 82 through negative pressure. The capacity of the dust collection box 82 is designed to be 100 liters, which can accommodate waste collection for a long time.

[0054] refer to Figures 1 to 6, baffles 21 are fixedly installed on both sides of the conveyor belt 2, and the baffles 21 are used to prevent the tire from deviating from the track during transportation. The height of the baffle 21 is 10 cm, the width is 5 cm, and the material is aluminum alloy, which has good wear resistance and stability. The conveyor belt 2 adopts a belt conveying method. The belt is made of high-strength rubber with a smooth surface to ensure that the tire 100 is not damaged during transportation. The movement speed of the conveyor belt 2 is adjusted by the frequency converter to ensure that it matches the scanning frequency of the laser scanner 4 and the movement speed of the rejection head 7. For example, when the detected marking marks are more or more complex, the controller 3 will reduce the movement speed of the conveyor belt 2 to ensure the accuracy and stability of the rejection.

[0055] refer to Figures 1 to 6 , the laser scanner 4 is installed on the side of the frame 1, and its scanning area covers the entire width of the conveyor belt 2. The model of the laser scanner 4 is LS-2000, the scanning accuracy is 0.1 mm, and the scanning frequency is 1000 times per second. The data transmission between the laser scanner 4 and the image processing module 5 adopts a high-speed USB3.0 interface to ensure the real-time and stability of data transmission. The image processing module 5 is installed under the laser scanner 4 and is connected to the frame 1 through a fixed bracket to ensure that its position is fixed and does not shake. The processing capacity of the image processing module 5 is 1000 frames per second, and it can process the image information collected by the laser scanner 4 in real time.

[0056] refer to Figures 1 to 6 The removal head 7 includes a rotating blade 71 and a blade fixing frame 72. The rotating blade 71 has a diameter of 5 cm and a thickness of 0.5 cm. It is made of high-speed steel and has good wear resistance and sharpness. The rotating blade 71 is connected to the output end of the electric drive unit 6 through the blade fixing frame 72 to ensure its stability during high-speed rotation. The dust suction nozzle 81 of the dust suction device 8 is fixed below the rotating blade 71. The dust suction nozzle 81 has a diameter of 3 cm and is made of stainless steel, which has good corrosion resistance and dust suction effect.

[0057] refer to Figures 1 to 6 The automatic rejection system for tread marking marks includes a conveying module, a detection module, a control module and a rejection module. The conveying module is mainly composed of a conveyor belt 2 and a baffle 21, which is used to convey the tire 100 and keep its path stable. The detection module includes a laser scanner 4 and an image processing module 5, which are used to detect the marking marks on the tire tread 100 and determine its position. The control module includes a controller 3, which is used to control the operation of the rejection module according to the information provided by the detection module. The rejection module includes an electric drive unit 6 and a rejection head 7, which are used to accurately reject the marking marks on the tire tread 100.

[0058] In a specific application scenario, it is assumed that a batch of tires 100 in a tire production line need to be removed from marking marks. The operator first places the tire 100 to be processed on the conveyor belt 2, and the conveyor belt 2 guides the tire 100 along a predetermined path through the baffle 21. When the tire 100 passes through the scanning area of ​​the laser scanner 4, the laser scanner 4 starts to scan the tire tread 100 and collect high-resolution image information. The scanned data is transmitted to the image processing module 5 through the high-speed USB3.0 interface, and the image processing module 5 pre-processes the image, removes noise and normalizes it. Subsequently, the feature extraction unit 52 extracts the marking mark features in the image, including edges, contours and colors. The positioning unit 53 determines the exact position of the marking mark on the tire tread 100 based on the extracted feature information, and transmits the position information to the controller 3 through the data line.

[0059] After receiving the position information, the controller 3 calculates the movement path and speed of the rejection head 7 based on the information. The controller 3 sends instructions to the electric drive unit 6 through the control line, and the stepper motor 61 drives the rejection head 7 to move to the position of the marking mark according to the instructions. At the same time, the controller 3 adjusts the rotation speed and position of the stepper motor 61 so that the rotating blade 71 can accurately cut the marking mark. During the rejection process, the dust suction nozzle 81 of the dust suction device 8 moves synchronously, and the generated waste is sucked into the dust box 82 through negative pressure to ensure a clean working environment.

[0060] The working process of the whole system is as follows: after the tire 100 is placed on the conveyor belt 2, the conveyor belt 2 is started to transport the tire 100 to the scanning area of ​​the laser scanner 4. The laser scanner 4 continuously scans the tire tread 100 to collect high-resolution image information. The scanned data is transmitted to the image processing module 5 through the data line. The image processing module 5 first pre-processes the image, removes noise and normalizes it, and then extracts the characteristic information of the marking mark, including the edge, contour and color. The positioning unit 53 determines the exact position of the marking mark on the tire tread 100 based on the extracted characteristic information, and sends the position information to the controller 3.

[0061] After receiving the position information, the controller 3 calculates the movement path and speed of the rejection head 7 based on the information. The controller 3 sends instructions to the electric drive unit 6 through the control line, and the stepper motor 61 drives the rejection head 7 to move to the position of the marking mark according to the instructions. At the same time, the controller 3 adjusts the rotation speed and position of the stepper motor 61 so that the rotating blade 71 can accurately cut the marking mark. During the rejection process, the dust suction nozzle 81 of the dust suction device 8 moves synchronously, and the generated waste is sucked into the dust collection box 82 through negative pressure.

[0062] The tire 100 continues to move along the conveyor belt 2, repeating the above process until all the marking marks on the tire tread 100 are removed. During this process, the controller 3 will adjust the movement speed of the conveyor belt 2 and the position and speed of the rejection head 7 in real time according to the information provided by the detection module to ensure the accuracy and stability of the rejection. The dust suction device 8 will continue to work to collect the waste generated during the rejection process to prevent the waste from scattering and polluting the environment.

[0063] The automatic rejection system for tread marking marks of the present invention also has the function of self-learning and optimization. During long-term operation, the controller 3 can optimize the movement path and speed of the rejection head 7 according to the rejection effect and waste collection situation, thereby improving the operation efficiency and rejection accuracy of the system. In addition, the system is also equipped with a fault detection and alarm function. When any abnormal situation is detected, the controller 3 will immediately stop the operation of the rejection head 7 and sound an alarm to remind the operator to check and maintain it.

[0064] The present invention can efficiently and accurately detect the position of the marking mark on the tire tread 100 through the combination of the laser scanner 4 and the image processing module 5, and realize the efficient removal of the marking mark through the precise control of the electric drive unit 6 and the rotating blade 71. At the same time, the dust collection device 8 is added to effectively collect the waste generated during the removal process, avoid environmental pollution, improve the cleanliness of the working environment, and extend the service life of the equipment. The system has the advantages of high degree of automation, high removal accuracy, stable operation, etc. It is suitable for various tire production lines and can significantly improve production efficiency and product quality.

[0065] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A tread marking mark automatic removal device, comprising a frame (1), a conveyor belt (2) and a removal component, wherein the conveyor belt (2) is mounted on the frame (1), a detection component is disposed on one side of the conveyor belt (2), and a removal component is disposed on the other side of the conveyor belt (2), and a controller (3) is fixedly mounted on the top of the frame (1); characterized in that: The detection component comprises a laser scanner (4), wherein the laser scanner (4) is fixedly mounted on one side of the conveyor belt (2), and an image processing module (5) is fixedly mounted below the laser scanner (4), wherein the image processing module (5) is used to process image information collected by the laser scanner (4), and the image processing module (5) is connected to the controller (3) via a data cable.

2. The automatic removal device for tread marking marks according to claim 1, characterized in that: The rejecting assembly comprises an electric drive unit (6) and a rejecting head (7); the electric drive unit (6) is fixedly mounted on a frame (1); the rejecting head (7) is fixedly mounted on an output end of the electric drive unit (6); and the electric drive unit (6) is connected to a controller (3) via a control line.

3. The automatic removal device for tread marking marks according to claim 1, characterized in that: Baffles (21) are fixedly mounted on both sides of the conveyor belt (2), and the baffles (21) are used to prevent the tire from deviating from the track during the conveying process.

4. The automatic removal device for tread marking marks according to claim 1, characterized in that: The scanning area of ​​the laser scanner (4) covers the entire width of the conveyor belt (2), ensuring that the marking marks on the tire tread (100) can be fully detected.

5. The automatic removal device for tread marking marks according to claim 1, characterized in that: The image processing module (5) comprises an image preprocessing unit (51), a feature extraction unit (52) and a positioning unit (53); the image preprocessing unit (51) is used to remove noise in the image and perform normalization processing on the image; the feature extraction unit (52) is used to extract features of the marking mark in the image, including but not limited to edges, contours and colors; and the positioning unit (53) is used to determine the precise position of the marking mark on the conveyor belt (2) based on the features extracted by the feature extraction unit (52).

6. The automatic removal device for tread marking marks according to claim 2, characterized in that: The removal head (7) comprises a rotating blade (71), the edge of which is ground with a sharp cutting edge for accurately cutting the marking mark on the tread (100), and the rotation speed and position of the rotating blade (71) are controlled by an electric drive unit (6).

7. The automatic removal device for tread marking marks according to claim 2, characterized in that: The rejecting assembly further comprises a dust suction device (8), which is fixedly mounted below the rejecting head (7) and is used to collect waste generated during the rejecting process to prevent the waste from polluting the environment.

8. The automatic removal device for tread marking marks according to claim 2, characterized in that: The electric drive unit (6) comprises a stepper motor (61) and a reducer (62); the output shaft of the stepper motor (61) is connected to the rotating blade (71) of the rejecting head (7) via the reducer (62); and the operation of the stepper motor (61) is controlled by a controller (3).

9. A method for automatically removing tread marking marks, characterized in that: The following steps are involved: S1, placing a tire to be processed on a conveyor belt (2), and the conveyor belt (2) guides the tire to move along a predetermined path through a baffle (21); S2, a laser scanner (4) scans the tire tread (100), collects image information of the tire tread (100), and transmits the image information to an image processing module (5); S3, the image processing module (5) pre-processes the image, removes noise and performs normalization processing, then extracts characteristic information of the marking mark, and determines the precise position of the marking mark on the tire tread (100); S4, the controller (3) controls the electric drive unit (6) to drive the rejection head (7) to move to the position of the marking mark according to the position information provided by the image processing module (5), and starts the rotating blade (71) to perform precise cutting; S5, a dust collecting device (8) collects waste generated during the removal process to prevent the waste from polluting the environment; S6, the tire continues to move along the conveyor belt (2), and the above process is repeated until all marking marks on the tire tread (100) are removed.

10. A system for automatically removing tread marking marks, characterized in that: The invention comprises a conveying module, a detection module, a control module and a rejection module; the conveying module is used to convey the tire to ensure that the tire moves along a predetermined path; the detection module comprises a laser scanner (4) and an image processing module (5) for detecting the marking mark on the tire tread (100) and determining its position; the control module is used to detect the marking mark on the tire tread (100) according to the marking mark provided by the detection module information to control the operation of the rejection module; the rejection module comprises an electric drive unit (6) and a rejection head (7), Used for accurately removing marking marks from a tire tread (100).

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