Tire tread fitting bubble maintenance system

Abstract

The invention relates to the technical field of tire manufacturing, and particularly provides a tire tread fitting bubble overhauling system which comprises an overhauling table, a rotating ring rotationally installed on the overhauling table and a first motor and further comprises a laser detection module, the laser detection module is electrically connected with a central control module, a first pressing roller mechanism is installed on the overhauling table, and a second pressing roller mechanism is installed on the first pressing roller mechanism. The pressing roller mechanism is arranged below the rotating ring, a second pressing roller mechanism is arranged on the overhaul stand, and the second pressing roller mechanism is arranged above the rotating ring; through the laser detection module, the outer circumference of the tire blank is determined to obtain the appearance, then the central control system accurately controls the initial positions, the displacement amounts and the stepping amounts of the central roller, the side rollers and the rear roller according to data values, and accurate attachment of the tire tread and the cap ply is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tire manufacturing, and in particular provides a tire tread laminating bubble inspection and repair system. Background Art

[0002] Tires are an important part of vehicles, carrying loads, transmitting traction and braking force, so the quality of tires will directly affect the safe driving of vehicles. Especially for passenger car tires, due to their high speed level, if the tires are damaged during high-speed driving, serious traffic accidents will occur.

[0003] During the production process of passenger car tires, the problem of tread bubbles often occurs. This is caused by the design characteristics of the passenger car tires themselves. In order to reduce the degree of shoulder wear of passenger car tires and to increase the drainage performance, the design of passenger car tires follows the characteristics of small saturation of the middle pattern and large saturation of the shoulder pattern. The rigidity of the pattern block increases from the middle to the shoulder. Therefore, less rubber is required in the middle of the crown, and more rubber is required to fill the shoulder. This results in the tread being thin in the middle and thick in the shoulder. During molding, the tread roller only rolls to the thicker shoulder of the tread, and cannot roll to the thinner middle part of the tread, resulting in the air between the middle part of the tread and the crown layer cannot be discharged. When the tire embryo is vulcanized, the air gathers to form tread bubbles. The crown is the only contact surface between the tire and the ground. Under greater pressure and shear force, the tread bubble area will gradually delaminate, posing a greater safety hazard.

[0004] In order to remove the lamination bubble, a pressing roller with a large middle diameter and small diameters at both ends is usually used to press the tread again. However, tires vary in size, and even tires of the same specification have different lamination bubble generation conditions, resulting in the roller size not being adaptable. Different pressing rollers need to be replaced in different situations, and multiple pressing rollers need to be prepared, wasting resources. Summary of the invention

[0005] In view of the above-mentioned defects, the present invention provides a tire tread bubble inspection and repair system, the purpose of which is to solve the problem of waste of resources caused by the need to replace different pressure rollers according to different tires in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a tire tread laminating bubble inspection system, which includes an inspection platform, a rotating ring and a first motor rotatably installed on the inspection platform, the first motor and the rotating ring are drivingly connected to drive the tire blank to rotate, and also includes a laser detection module, the laser detection module is electrically connected to the central control module, a first pressing roller mechanism is installed on the inspection platform, the pressing roller mechanism is located below the rotating ring, and a second pressing roller mechanism is installed on the inspection platform, the second pressing roller mechanism is located above the rotating ring;

[0007] Among them, the laser detection module includes a transmitting end, a receiving end and an analysis unit, the transmitting end includes at least two lateral laser transmitting heads, the laser transmitting heads can emit laser to the tread, the receiving end includes at least two optical sensors, the optical sensors can receive the reflected laser from the tread, and the analysis unit can calculate the position information of each point on the tire surface according to the angle change between the reflected laser and the laser transmitting head.

[0008] Preferably, the first pressing roller mechanism includes a support platform, on which a center roller and side rollers located on both sides of the center roller are rotatably mounted, the first pressing roller mechanism is installed on the maintenance platform via a first lifting mechanism, the second pressing roller mechanism includes two inclined rear rollers, the second pressing roller mechanism is installed on the maintenance platform via a second lifting mechanism, and the center roller is installed on the support platform via a third lifting mechanism.

[0009] Preferably, the two rear rollers are symmetrically arranged about the width center line of the rotating ring, and the rear rollers are rotatably installed on a bending rod, the bending rod is fixedly connected to a slider, the slider is threadedly connected to a lead screw, the lead screw is divided into an upper half and a lower half with opposite thread rotation directions, the lead screw is rotatably installed on a slide, the lead screw is drive-connected to a second motor, the second motor is fixed to the slide, and the slider is slidably connected to the slide.

[0010] Preferably, the method comprises the following steps:

[0011] A1. Obtain the tread profile, including the tire green diameter d, the tread center width a, and the shoulder height difference h, through the laser detection module, and adjust the position of the first rolling mechanism through the first lifting mechanism so that the side roller contacts the tread;

[0012] A2. Adjust the position of the second roller pressing mechanism through the second lifting mechanism so that the rear roller contacts the tread, and then preset the displacement W of the rear roller in the vertical direction. 后 and step size B 后 ;

[0013] A3. Start the first motor and preset the first motor speed S i , adjust the position of the center roller through the third lifting mechanism so that the center roller contacts the tread, and then preset the displacement W of the center roller 中 and step size B 中 ;

[0014] A4. Start the second motor and set the total horizontal displacement of the rear roller to X. 后 and displacement step F 后 .

[0015] Preferably, in step A3, the first motor speed is determined as follows: i=S0*K1(d / d0);

[0016] Among them, K1 is the first adjustment factor, d0 is the preset diameter of the tire, and S0 is the first motor speed under the preset diameter d0.

[0017] Preferably, in step A2, the displacement W of the rear roller in the vertical direction is 后 =h0-h; In step A3, the displacement of the center roller W 中 =h0-h; h0 is the height difference of the shoulder surface in the bubble-free state.

[0018] Preferably, in step A4, the total displacement X of the rear roller in the horizontal direction is 后 =(at) / 2, t is the distance between the contact points of the two rear rollers and the tread.

[0019] Preferably, it further comprises a visual detection module, the visual detection module is electrically connected to the central control module, and the visual detection module comprises:

[0020] An image acquisition unit capable of quickly acquiring image information on pressure-sensitive paper;

[0021] An image processing unit, which can perform pre-processing operations such as denoising and filtering on the collected images;

[0022] The analysis unit can use image processing algorithms to extract the characteristics of the color pattern on the pressure-sensitive paper, such as color depth, area size, distribution form, etc.

[0023] Preferably, the method further comprises the following steps:

[0024] A5. Stick the pressure-sensitive paper on the tread surface along the tread width direction, and then roll the tread over the pressure-sensitive paper under a certain pressure;

[0025] A6. Use the visual inspection module to inspect the pressed pressure-sensitive paper. According to the depth Ci and density Mi of the red area in the middle, adjust the vertical displacement of the rear roller to Wi. 后 , adjust the displacement of the center roller to Wi 中 , adjust the horizontal displacement step of the rear roller Fi 后 ;

[0026] A7. Obtain the vulcanized tire, sample the vulcanized tire and cut the entire crown along the circumferential direction to check whether there are tread bubbles.

[0027] Preferably, in step A6, the displacement of the rear roller in the vertical direction is adjusted as follows: Wi 后＝ W 后 *Ln, the adjustment method of the displacement of the center roller is: Wi 中＝ W 中 *Ln;

[0028] Specifically, n = 1, 2, 3 and L1 = 1 <L2<L3<1.1,

[0029] When C i When / C0≥0.95, Wi 后 =W 后 *L1, Wi 中 =W 中 *L1,

[0030] When 0.8 <C i When / C0<0.95, Wi 后 =W 后 *L2, Wi 中 =W 中 *L2, when C i / C0≤0.8, Wi 后 =W 后 *L3, Wi 中 =W 中 *L3;

[0031] C0 is the depth of the central red area obtained using pressure-sensitive paper in the absence of bubbles;

[0032] The adjustment method of the rear roller after the horizontal displacement step Fi is: 后 =F 后 *Nn;

[0033] Specifically, n=1,2,3 and N1=1>N2>N3>0.5,

[0034] When M i / M0≥0.95,Fi 后 =F 后 *N1, Fi 中 =F 中 *N1,

[0035] When 0.8 <M i / M0<0.95,Fi 后 =F 后 *N2,Fi 中 =F 中 *N2, when M i / M0≤0.8,Fi 后 =F 后 *N3, Fi 中 =F 中 *N3;

[0036] M0 is the density value of the middle red area obtained using pressure-sensitive paper in a bubble-free state.

[0037] The object of the present invention is to provide a tire tread bubble inspection and repair system, which has the following beneficial effects:

[0038] The present invention uses a laser detection module to determine the outer circumference of the tire embryo to obtain the shape. Then the central control system accurately controls the initial position, displacement and step amount of the center roller, side roller and rear roller according to the data value, achieving accurate fitting of the tread and the cap layer. At the same time, the pressure-sensitive paper detection technology is innovatively introduced. By observing the color change of the pressure-sensitive paper, it is intuitively judged whether the tread rolling is complete. Combined with the visual detection technology, the result of the pressure-sensitive paper is fed back to correct the relevant vertical of the center roller, side roller and rear roller, further improving the accuracy of removing the lamination bubble. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of a tire tread bubble inspection system;

[0040] Figure 2 Is there a situation where the pressure-sensitive paper is rolled when laminating the bubble;

[0041] Figure 3 It is the rolling condition of pressure-sensitive paper when there is no lamination bubble.

[0042] In the figure: 1-inspection table; 2-rotating ring; 3-first motor; 10-support table; 11-center roller; 12-side roller; 13-rear roller; 131-bending rod; 14-slider; 15-lead screw; 150-upper half; 151-lower half; 16-slide; 17-second motor. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] like Figure 1-Figure 3 As shown, the present invention provides a tire tread bubble inspection system, including an inspection platform 1, a rotating ring 2 and a first motor 3 rotatably installed on the inspection platform 1, the first motor 3 and the rotating ring 2 are drivingly connected, the rotation of the first motor 3 drives the rotating ring 2 to rotate, the tire blank is sleeved on the outer circumferential surface of the rotating ring 2, and the rotation of the rotating ring 2 drives the tire blank to rotate.

[0045] The present invention also includes a laser detection module, which is electrically connected to the central control module. A first pressure roller mechanism is installed on the maintenance platform 1, and the pressure roller mechanism is located below the rotating ring 2. A second pressure roller mechanism is installed on the maintenance platform 1, and the second pressure roller mechanism is located above the rotating ring 2.

[0046] Among them, the laser detection module includes a transmitting end, a receiving end and an analysis unit. The transmitting end includes at least two lateral laser transmitting heads, and the laser transmitting heads can emit lasers to the tread. The receiving end includes at least two optical sensors, and the optical sensors can receive the reflected lasers from the tread. The analysis unit can calculate the position information of each point on the tire surface according to the angle change between the reflected laser and the laser transmitting head. After the tire rotates one circle, the tire outer contour point cloud data is collected, and the greedy projection triangulation algorithm is used for three-dimensional reconstruction, which can intuitively display the outer circumference of the tire.

[0047] As a further explanation of this embodiment, the first pressing roller mechanism includes a support platform 10, on which a center roller 11 and side rollers 12 located on both sides of the center roller 11 are rotatably mounted, the first pressing roller mechanism is installed on the maintenance platform 1 via a first lifting mechanism, the second pressing roller mechanism includes two inclined rear rollers 13, the second pressing roller mechanism is installed on the maintenance platform 1 via a second lifting mechanism, and the center roller 11 is installed on the support platform 10 via a third lifting mechanism.

[0048] Preferably, the first lifting mechanism, the second lifting mechanism and the third lifting mechanism all use cylinders and are all electrically connected to the central control module.

[0049] As a further explanation of this embodiment, the two rear rollers 13 are symmetrically arranged about the width center line of the rotating ring, and the rear roller 13 is rotatably installed on one end of the bending rod 131, and the other end of the bending rod 131 is fixedly connected to the slider 14, and the slider 14 is threadedly connected to the lead screw 15, and the lead screw 15 is divided into an upper half 150 and a lower half 151 with opposite thread rotation directions, the upper half 150 is threadedly matched with one of the sliders 14, and the lower half 151 is threadedly matched with the other symmetrically arranged slider 14, and the lead screw 15 is rotatably installed on the slide 16, and the lead screw 15 is drivingly connected to the second motor 17, and the second motor 17 is fixed on the slide 16, and the slider 14 is slidably connected to the slide 16.

[0050] The central control module is also electrically connected to the first motor 3 and the second motor 17 .

[0051] The steps include:

[0052] A1. Obtain the tread profile, including the tire green diameter d, the tread center width a, and the shoulder height difference h, through the laser detection module, and adjust the position of the first rolling mechanism through the first lifting mechanism so that the side roller 12 contacts the tread;

[0053] The shoulder height difference h is the height difference between the shoulder part on both sides of the tread and the middle part of the tread.

[0054] A2. Adjust the position of the second roller pressing mechanism by the second lifting mechanism so that the rear roller 13 contacts the tread, and then preset the displacement W of the rear roller 13 in the vertical direction. 后 and step size B 后 ;

[0055] A3. Start the first motor and preset the first motor speed S i The position of the center roller 11 is adjusted by the third lifting mechanism so that the center roller 11 contacts the tread, and then the displacement W of the center roller 11 is preset. 中 and step size B 中 ;

[0056] A4, start the second motor 17, preset the total displacement X of the rear roller 13 in the horizontal direction 后 and displacement step F 后 .

[0057] The step amount mentioned above is the displacement of the center roller 11 in the vertical direction, or the displacement of the rear roller 13 in the horizontal or vertical direction when the rotating ring 2 rotates one circle or the rotating ring 2 rotates one processing cycle (may be 2 circles or 3 circles).

[0058] As a further explanation of this embodiment, in step A3, the first motor speed is determined as follows: i =S0*K1(d / d0); wherein K1 is the first adjustment factor, d0 is the preset diameter of the tire, and S0 is the first motor speed at the preset diameter d0.

[0059] As a further explanation of this embodiment, in step A2, the displacement W of the rear roller 13 in the vertical direction is 后 =h0-h; in step A3, the displacement W of the center roller 11 中 =h0-h; h0 is the height difference of the shoulder surface in the bubble-free state.

[0060] As a further explanation of this embodiment, in step A4, the total displacement X of the rear roller 13 in the horizontal direction is 后 =(at / 2), t is the distance between the contact points of the two rear rollers and the tread.

[0061] As a further explanation of this embodiment, a visual detection module is also included, and the visual detection module is electrically connected to the central control module, and the visual detection module includes:

[0062] An image acquisition unit capable of quickly acquiring image information on pressure-sensitive paper;

[0063] An image processing unit, which can perform pre-processing operations such as denoising and filtering on the collected images;

[0064] The analysis unit can use image processing algorithms to extract the characteristics of the color pattern on the pressure-sensitive paper, such as color depth, area size, distribution form, etc.

[0065] Also includes the following steps:

[0066] A5. Stick the pressure-sensitive paper on the tread surface along the tread width direction, and then roll the tread over the pressure-sensitive paper under a certain pressure;

[0067] A6. Use the visual inspection module to inspect the pressed pressure-sensitive paper, and adjust the vertical displacement of the rear roller 13 to Wi according to the depth Ci and density Mi of the red area in the middle. 后 , adjust the displacement of the center roller 11 to Wi 中 , adjust the displacement step amount Fi of the rear roller 13 in the horizontal direction 后 ;

[0068] A7. Obtain a vulcanized tire, and sample the vulcanized tire and cut the entire crown portion along the circumferential direction to check whether there are tread bubbles.

[0069] As a further explanation of this embodiment, in step A6, the displacement of the rear roller 13 in the vertical direction is adjusted as follows: Wi 后＝ W 后 *Ln, the displacement of the center roller 11 is adjusted as follows: Wi 中 =W 中 *Ln;

[0070] Specifically, n = 1, 2, 3 and L1 = 1 <L2<L3<1.1,

[0071] When C i When / C0≥0.95, Wi 后 =W 后 *L1, Wi 中 =W 中 *L1,

[0072] When 0.8 <C i When / C0<0.95, Wi 后 =W 后 *L2, Wi 中 =W 中 *L2, when C i / C0≤0.8, Wi 后 =W 后 *L3, Wi 中 =W 中 *L3;

[0073] C0 is the depth of the central red area obtained using pressure-sensitive paper in the absence of bubbles;

[0074] If the depth of the red area in the middle is not enough, it proves that the displacement of the center roller 11 and the rear roller 13 is not enough to remove all the lamination bubbles, so it is necessary to slightly increase the displacement of the center roller 11 and the rear roller 13 in the vertical direction.

[0075] The adjustment method of the rear roller 13 after the horizontal displacement step Fi is: 后 =F 后 *Nn;

[0076] Specifically, n=1,2,3 and N1=1>N2>N3>0.5,

[0077] When M i / M0≥0.95,Fi 后 =F 后 *N1, Fi 中 =F 中 *N1,

[0078] When 0.8 <M i / M0<0.95,Fi 后 =F 后 *N2,Fi 中 =F 中 *N2, when M i / M0≤0.8,Fi 后 =F 后 *N3, Fi 中 =F 中 *N3;

[0079] M0 is the density value of the middle red area obtained using pressure-sensitive paper in a bubble-free state.

[0080] Because if there is a problem with the density value of the central red area, it proves that the step amount of the rear roller 13 is too large, so it is necessary to set parameters to reduce the step amount of the rear roller 13.

[0081] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. A tire tread laminating bubble inspection system, comprising an inspection platform, a rotating ring and a first motor rotatably mounted on the inspection platform, wherein the first motor and the rotating ring are drivingly connected to drive the tire blank to rotate, characterized in that: It also includes a laser detection module, the laser detection module is electrically connected to the central control module, a first pressing roller mechanism is installed on the inspection platform, the first pressing roller mechanism is located below the rotating ring, and a second pressing roller mechanism is installed on the inspection platform, the second pressing roller mechanism is located above the rotating ring; Among them, the laser detection module includes a transmitting end, a receiving end and an analysis unit, the transmitting end includes at least two lateral laser transmitting heads, the laser transmitting heads can emit laser to the tread, the receiving end includes at least two optical sensors, the optical sensors can receive the reflected laser from the tread, and the analysis unit can calculate the position information of each point on the tire surface according to the angle change between the reflected laser and the laser transmitting head.

2. The tire tread bubble repair system according to claim 1, characterized in that: The first pressing roller mechanism includes a support platform, on which a center roller and side rollers located on both sides of the center roller are rotatably mounted, the first pressing roller mechanism is installed on the maintenance platform via a first lifting mechanism, the second pressing roller mechanism includes two inclined rear rollers, the second pressing roller mechanism is installed on the maintenance platform via a second lifting mechanism, and the center roller is installed on the support platform via a third lifting mechanism.

3. The tire tread bubble repair system according to claim 2, characterized in that: The two rear rollers are symmetrically arranged about the width center line of the rotating ring, and the rear rollers are rotatably installed on a bending rod, the bending rod is fixedly connected to a slider, the slider is threadedly connected to a lead screw, the lead screw is divided into an upper half and a lower half with opposite thread rotation directions, the lead screw is rotatably installed on a slide, the lead screw is drive-connected to a second motor, the second motor is fixed to the slide, and the slider is slidably connected to the slide.

4. The tire tread bubble repair system according to claim 3, characterized in that: The steps include: A1. Obtain the tread profile, including the tire green diameter d, the tread center width a, and the shoulder height difference h, through the laser detection module, and adjust the position of the first rolling mechanism through the first lifting mechanism so that the side roller contacts the tread; A2. Adjust the position of the second roller pressing mechanism through the second lifting mechanism so that the rear roller contacts the tread, and then preset the displacement W of the rear roller in the vertical direction. 后 and step size B 后 ; A3. Start the first motor and preset the first motor speed S i , adjust the position of the center roller through the third lifting mechanism so that the center roller contacts the tread, and then preset the displacement W of the center roller 中 and step size B 中 ; A4. Start the second motor and set the total horizontal displacement of the rear roller to X. 后 and displacement step F 后 .

5. The tire tread bubble repair system according to claim 4, characterized in that: In step A3, the first motor speed is determined as follows: i =S0*K1(d / d0); Among them, K1 is the first adjustment factor, d0 is the preset diameter of the tire, and S0 is the first motor speed under the preset diameter d0.

6. The tire tread bubble repair system according to claim 5, characterized in that: In step A2, the displacement W of the rear roller in the vertical direction is 后 =h0-h; In step A3, the displacement W of the center roller is 中 =h0-h; h0 is the height difference of the shoulder surface in the bubble-free state.

7. The tire tread bubble repair system according to claim 6, characterized in that: In step A4, the total displacement X of the rear roller in the horizontal direction 后 =(at) / 2, t is the distance between the contact points of the two rear rollers and the tread.

8. The tire tread bubble repair system according to claim 7, characterized in that: It also includes a visual detection module, which is electrically connected to the central control module, and the visual detection module includes: an image acquisition unit, which can quickly acquire image information on the pressure-sensitive paper; An image processing unit, which can perform pre-processing operations such as denoising and filtering on the collected images; The analysis unit can use image processing algorithms to extract the characteristics of the color pattern on the pressure-sensitive paper, such as color depth, area size, distribution form, etc.

9. The tire tread bubble repair system according to claim 8, characterized in that: It also includes the following steps, A5. Stick the pressure-sensitive paper on the tread surface along the tread width direction, and then roll the tread over the pressure-sensitive paper under a certain pressure; A6. Use the visual inspection module to inspect the pressed pressure-sensitive paper. According to the depth Ci and density Mi of the red area in the middle, adjust the vertical displacement of the rear roller to Wi. 后 , adjust the displacement of the center roller to Wi 中 , adjust the horizontal displacement step of the rear roller Fi 后 ; A7. Obtain the vulcanized tire, sample the vulcanized tire and cut the entire crown along the circumferential direction to check whether there are tread bubbles.

10. The tire tread bubble repair system according to claim 9, characterized in that: In step A6, the displacement of the rear roller in the vertical direction is adjusted as follows: Wi 后＝ W 后 *Ln, the adjustment method of the displacement of the center roller is: Wi 中＝ W 中 *Ln; Specifically, n = 1, 2, 3 and L1 = 1 <L2<L3<1.1, When C i When / C0≥0.95, Wi 后 =W 后 *L1, Wi 中 =W 中 *L1, When 0.8 < C i / C0 < 0.95, Wi 后 = W 后 * L2, Wi 中 = W 中 * L2, When C i / C0≤0.8, Wi 后 =W 后 *L3, Wi 中 =W 中 *L3; C0 is the depth of the central red area obtained using pressure-sensitive paper in the absence of bubbles; The adjustment method of the rear roller after the horizontal displacement step Fi is: 后 =F 后 *Nn; Specifically, n=1,2,3 and N1=1>N2>N3>0.5, When M i / M0≥0.95,Fi 后 =F 后 *N1, Fi 中 =F 中 *N1, When 0.8 <M i / M0<0.95,Fi 后 =F 后 *N2,Fi 中 =F 中 *N2, When M i / M0≤0.8,Fi 后 =F 后 *N3, Fi 中 =F 中 *N3; M0 is the density value of the middle red area obtained using pressure-sensitive paper in a bubble-free state.

Images