Drum diameter measurement method and drum diameter measurement device
By using a laser rangefinder sensor to detect changes in the drum radius and calculate offset parameters, the drum radius is automatically adjusted, solving the problems of low efficiency and loss of accuracy caused by frequent drum diameter measurements, thus improving tire production efficiency and quality.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- MESNAC CO LTD
- Filing Date
- 2025-12-25
- Publication Date
- 2026-07-09
Smart Images
Figure CN2025145772_09072026_PF_FP_ABST
Abstract
Description
Drum diameter testing methods and equipment
[0001] This application claims priority to patent application No. 202411997638.7, filed with the China National Intellectual Property Administration on December 31, 2024, entitled "Drum Diameter Detection Method and Drum Diameter Detection Equipment", the entire contents of which are incorporated herein by reference. Technical Field
[0002] This application relates to the field of tire manufacturing, and more specifically, to a method and equipment for detecting the diameter of a tire drum. Background Technology
[0003] The rapid development of the tire manufacturing industry requires continuous improvement in the precision and stability of tire forming machines. Currently, in the tire forming production process, it is necessary to frequently measure and calibrate the drum diameter value. If the calibration is not timely, the loss of the drum diameter value will affect the tire quality. Operators need to frequently measure the drum diameter, which will affect production efficiency. Summary of the Invention
[0004] The main objective of this application is to provide a drum diameter detection method and a drum diameter detection device to solve the problem of frequent drum diameter measurement in the prior art.
[0005] To achieve the above objectives, according to an optional embodiment of this application, a drum diameter detection method is provided, comprising: a calibration process, measuring the radius C1 of the drum plate, obtaining the distance A1 between the detection element and the rotating shaft through the detection element, obtaining the distance B1 between the detection element and the drum plate through the detection element, measuring the radius C2 of the drum plate after the drum plate radially expands or contracts, obtaining the distance B2 between the detection element and the drum plate, and calculating the offset parameter of the detection element based on C1, C2, B1, and B2; and an execution process, obtaining the distance A2 between the detection element and the rotating shaft through the detection element, if A2 is the same as A1, then obtaining the distance B3 between the detection element and the drum plate through the detection element, calculating the radius C3 of the drum plate based on A2, B3, and the offset parameter, and comparing C3 with the predetermined radius C of the drum plate. If C3 is the same as C, then the rubber material is wound on the drum plate and tire production operations are carried out.
[0006] In one alternative embodiment, the drum diameter detection method further includes: repeating the calibration process and execution process when the size of the tire to be processed changes; and repeating the execution process only when the size of the tire to be processed remains unchanged.
[0007] In one alternative embodiment, the drum plate includes a transmitting element, and the drum diameter detection method further includes aligning the transmitting element with the detection element when the distance between the detection element and the rotating shaft is obtained through the detection element, and the detection light of the detection element passes through the transmitting element to reach the rotating shaft; and misaligning the transmitting element with the detection element when the distance between the detection element and the drum plate is obtained through the detection element, and the detection light of the detection element reaches the drum plate.
[0008] In one optional embodiment, there are multiple through-holes, and at least two through-holes have different sizes. The drum diameter detection method further includes an adjustment process prior to the calibration process. The adjustment process includes: obtaining the required size of the through-hole based on the required error and the time required for the detection element to align with the through-hole, and replacing the through-hole so that the size of the through-hole in the replaced through-hole is the same as the required size.
[0009] In one alternative embodiment, the drum diameter detection method further includes: if A2 is different from A1, or C3 is different from C, the alarm device issues an alarm.
[0010] In one alternative embodiment, the detection element is adjustablely mounted on the mounting bracket, and the drum diameter detection method further includes adjusting the position of the detection element on the mounting bracket and repeating the calibration process or execution process when A2 is different from A1 or C3 is different from C.
[0011] According to an optional embodiment of this application, a drum diameter detection device is provided, comprising: a rotating shaft; a drum plate assembly, the drum plate assembly being expandably and retractably sleeved on the outside of the rotating shaft, and the rotating shaft driving the drum plate assembly to rotate together, the drum plate assembly including a plurality of drum plates arranged in at least one of circumferential and axial directions; and a detection element facing the drum plate assembly and used to detect the distance between the detection element and the drum plate and the rotating shaft.
[0012] In one alternative embodiment, the drum plate includes a transducer through which the detection light of the detection element passes, and the detection element detects the distance between itself and the rotating shaft through the transducer.
[0013] In one alternative embodiment, the transmissive element has a transmissive structure through which detection light from the detection element passes, the transmissive structure including at least one of a transparent portion and a through hole.
[0014] In one alternative embodiment, the drum assembly further includes a frame on which the drum is detachably mounted, and multiple through-holes, with at least two through-holes having different through-hole structures.
[0015] In one alternative embodiment, the drum diameter detection device further includes a mounting bracket on which the detection element is adjustablely mounted.
[0016] By applying the technical solution of this application, the following technical effects are achieved:
[0017] In actual use, the distance between the detection component and the rotating shaft is a fixed value A1. To facilitate the measurement of the distance between the detection component and the rotating shaft, and the distance between the detection component and the drum plate, a laser rangefinder is usually selected as the detection component. However, due to vibration and other reasons during operation, it is impossible to guarantee that the light emitted by the laser rangefinder's light source passes through the axis of the rotating shaft. Therefore, it is necessary to measure the deflection angle of the laser rangefinder to reduce detection deviation. When the drum plate expands or contracts, the position of the light-transmitting hole on the drum plate will change, while the position of the laser rangefinder's light source remains unchanged. The offset parameter of the detection component is calculated by using the distance B1 between the detection component and the drum plate and the radius C1 of the drum plate measured before the trigonometric function change, and the distance B2 between the detection component and the drum plate and the radius C2 of the drum plate after the change. Then, the tire is processed and inspected. Before operation, the distance A2 between the detection component and the rotating shaft is measured. If A2 is the same as A1, the equipment works normally. If A2 and A1 are different, the operator needs to check and correct it. Next, the distance B3 between the test piece and the drum is obtained through the test piece. The radius C3 of the drum is calculated based on A2, B3 and the offset parameter. C3 is then compared with the predetermined radius C of the drum. If C3 is the same as C, the rubber material is wound on the drum and the tire production operation begins.
[0018] This allows for the detection and correction of the diameter data for each tire drum, eliminating the need for operators to frequently check the drum diameter data. This reduces equipment downtime for inspection, lowers operator workload, and improves tire production efficiency. It also avoids the problem of lost drum diameter accuracy due to operator inspection intervals, thus improving tire quality. Attached Figure Description
[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:
[0020] Figure 1 shows a schematic diagram of the overall structure of the drum diameter detection device of this application.
[0021] The above figures include the following reference numerals:
[0022] 10. Shaft; 20. Drum assembly; 30. Detection component; 40. Transmitting component. Detailed Implementation
[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0024] To address the problem of frequent drum diameter measurements in existing technologies, this application provides a drum diameter detection method and a drum diameter detection device.
[0025] Example 1
[0026] The drum diameter detection method includes a calibration process and an execution process. During calibration, the radius C1 of the drum plate is measured, the distance A1 between the measuring element and the rotating shaft is obtained using a measuring element, and the distance B1 between the measuring element and the drum plate is also obtained using a measuring element. After the drum plate expands or contracts radially, the radius C2 of the drum plate at this time is measured, and the distance B2 between the measuring element and the drum plate is obtained. The offset parameter of the measuring element is calculated based on C1, C2, B1, and B2. During execution, the distance A2 between the measuring element and the rotating shaft is obtained using a measuring element. If A2 is the same as A1, the distance B3 between the measuring element and the drum plate is obtained using a measuring element. The radius C3 of the drum plate is calculated based on A2, B3, and the offset parameter, and C3 is compared with the predetermined radius C of the drum plate. If C3 is the same as C, the rubber compound is wound onto the drum plate, and tire production begins.
[0027] Specifically, in actual use, the distance between the detection component and the rotating shaft is a fixed value A1. To facilitate the measurement of the distance between the detection component and the rotating shaft, and the distance between the detection component and the drum plate, a laser rangefinder is usually selected as the detection component. However, due to vibration and other reasons during operation, it cannot be guaranteed that the light emitted by the laser rangefinder's light source passes through the axis of the rotating shaft. Therefore, it is necessary to measure the deflection angle of the laser rangefinder to reduce detection deviation. When the drum plate expands or contracts, the position of the light-transmitting hole on the drum plate will change, while the position of the laser rangefinder's light source remains unchanged. The offset parameter of the detection component is calculated by using the distance B1 between the detection component and the drum plate and the radius C1 of the drum plate measured before the trigonometric function change, and the distance B2 between the detection component and the drum plate and the radius C2 of the drum plate after the change. Then, the tire is processed and inspected. Before operation, the distance A2 between the detection component and the rotating shaft is measured. If A2 is the same as A1, the equipment works normally. If A2 and A1 are different, the operator needs to check and correct it. Next, the distance B3 between the test piece and the drum is obtained through the test piece. The radius C3 of the drum is calculated based on A2, B3 and the offset parameter. C3 is then compared with the predetermined radius C of the drum. If C3 is the same as C, the rubber material is wound on the drum and the tire production operation begins.
[0028] This allows for the detection and correction of the diameter data for each tire drum, eliminating the need for operators to frequently check the drum diameter data. This reduces equipment downtime for inspection, lowers operator workload, and improves tire production efficiency. It also avoids the problem of lost drum diameter accuracy due to operator inspection intervals, thus improving tire quality.
[0029] In this application, the drum diameter detection method further includes: repeating the calibration process and execution process when the size of the tire to be processed changes; and repeating the execution process only when the size of the tire to be processed remains unchanged.
[0030] Specifically, in actual production, tires of different diameters are produced. When producing tires of the same diameter, the dimensions of the sprue expansion or contraction do not change, so only one calibration is needed. Subsequent production with the same diameter does not require further calibration. When the diameter of the produced tires changes, the dimensions of the sprue expansion or contraction change. To reduce measurement errors, the offset parameters of the test piece need to be re-acquired.
[0031] In this application, the drum plate includes a transmitting element, and the drum diameter detection method further includes aligning the transmitting element with the detection element when the distance between the detection element and the rotating shaft is obtained through the detection element, and the detection light of the detection element passes through the transmitting element to reach the rotating shaft; when the distance between the detection element and the drum plate is obtained through the detection element, the transmitting element and the detection element are misaligned, and the detection light of the detection element reaches the drum plate.
[0032] Specifically, by rotating the shaft, it is possible to adjust whether the transmitting element, the detection element, and the shaft are aligned on a straight line. When they are aligned, the distance between the detection element and the shaft is measured; when they are not aligned, the distance between the detection element and the drum plate is measured. In this way, only one transmitting element is needed to measure two data points, making data measurement convenient.
[0033] In this application, there are multiple through-holes, and at least two through-holes have different sizes. The drum diameter detection method also includes an adjustment process before the calibration process. The adjustment process includes: obtaining the required size of the through-hole based on the required error and the time required for the detection element to align with the through-hole, and replacing the through-hole so that the size of the through-hole in the replaced through-hole is the same as the required size.
[0034] Specifically, when light passes through a small through-hole, the resulting light spot is smaller, thus reducing measurement error, but increasing the alignment time between the sensor and the through-hole. Conversely, when light passes through a large through-hole, the resulting light spot is larger, leading to a larger measurement error, but reducing the alignment time. In practical applications, the appropriate through-hole size should be selected based on the operator's experience and the tire's diameter to maximize both inspection accuracy and production efficiency.
[0035] In this application, the drum diameter detection method also includes an alarm device issuing an alarm if A2 is different from A1 or C3 is different from C.
[0036] Specifically, alarms facilitate notification to operators, allowing for timely adjustments to the equipment.
[0037] In this application, the testing element is adjustablely mounted on the mounting bracket, and the drum diameter testing method further includes adjusting the position of the testing element on the mounting bracket and repeating the calibration process or execution process when A2 is different from A1 or C3 is different from C.
[0038] By changing the position of the test piece on the mounting bracket, it is possible to make the test piece suitable for tires of different diameters, or to make adjustments to the test piece when A2 is different from A1, or C3 is different from C.
[0039] Example 2
[0040] Referring to Figure 1, the drum diameter detection device includes a drum shaft, a drum plate assembly 20, and a detection element 30. The drum plate assembly 20 is expandably and retractably sleeved on the outside of the rotating shaft 10, and the rotating shaft 10 drives the drum plate assembly 20 to rotate together. The drum plate assembly 20 includes a plurality of drum plates arranged in at least one of the circumferential and axial directions. The detection element 30 faces the drum plate assembly 20 and is used to detect the distance between itself and the drum plates and the rotating shaft 10.
[0041] In use, the detection element 30 is set in a fixed position. During detection, the distance between the detection element 30 and the drum plate and the rotating shaft 10 is detected and recorded. During operation, the distance between the detection element 30 and the drum plate and the distance between the detection element 30 and the rotating shaft 10 are detected. The diameter data of each tire drum can be detected and corrected. Operators do not need to frequently check the drum diameter data, which reduces equipment downtime for inspection, reduces the workload of operators, and improves tire production efficiency.
[0042] Preferably, the detection element 30 is a laser rangefinder, which can facilitate the detection of the distance between the detection element 30 and the drum plate and the rotating shaft 10.
[0043] In this application, the drum plate includes a transmission element 40 through which the detection light of the detection element 30 passes, and the detection element 30 detects the distance between itself and the rotating shaft 10 through the transmission element 40.
[0044] In this application, the transmitting element 40 has a transmitting structure through which the detection light of the detection element 30 passes, and the transmitting structure includes at least one of a transparent portion and a through hole.
[0045] Specifically, when the drum plate is in a retracted state, the two adjacent drum plates will fit tightly together, and light cannot pass through the drum plate at this time, so it is impossible to detect the distance between the detection element 30 and the rotating shaft 10. By setting the transmitting element 40 on the drum plate, light can pass through the drum plate and shine onto the rotating shaft 10, thereby facilitating the detection of the distance between the detection element 30 and the rotating shaft 10.
[0046] In this application, the drum assembly 20 also includes a frame on which the drum is detachably mounted, and there are multiple transmission elements 40, with at least two transmission elements 40 having different sizes of transmission structures.
[0047] Specifically, when the light-transmitting structure is smaller, the resulting light spot is smaller, thus reducing the measurement error. However, this increases the alignment time between the detection element 30 and the through-hole. Conversely, when the light-transmitting structure is larger, the resulting light spot is larger, leading to a larger measurement error, but reducing the alignment time between the detection element 30 and the through-hole. In practical applications, a suitable size and appropriate transmission structure should be selected based on the operator's experience and the tire's diameter to maximize both detection accuracy and production efficiency.
[0048] In this application, the drum diameter detection device also includes a mounting bracket, and the detection element 30 is adjustablely mounted on the mounting bracket.
[0049] By changing the position of the test piece 30 on the mounting bracket, it is possible to adapt the test piece 30 to tires of different diameters.
[0050] As can be seen from the above description, the embodiments of this application achieve the following technical effects:
[0051] 1. Specifically, in actual use, the distance between the detection component and the rotating shaft is a fixed value A1. To facilitate the measurement of the distance between the detection component and the rotating shaft, and the distance between the detection component and the drum plate, a laser rangefinder is usually selected as the detection component. However, due to vibration and other reasons during operation, it cannot be guaranteed that the light emitted by the laser rangefinder's light source passes through the axis of the rotating shaft. Therefore, it is necessary to measure the deflection angle of the laser rangefinder to reduce detection deviation. When the drum plate expands or contracts, the position of the light-transmitting hole on the drum plate will change, while the position of the laser rangefinder's light source remains unchanged. The offset parameter of the detection component is calculated by using the distance B1 between the detection component and the drum plate and the radius C1 of the drum plate measured before the trigonometric function change, and the distance B2 between the detection component and the drum plate and the radius C2 of the drum plate after the change. Then, the tire is processed and inspected. Before operation, the distance A2 between the detection component and the rotating shaft is measured. If A2 is the same as A1, the equipment works normally. If A2 and A1 are different, the operator needs to check and correct it. Next, the distance B3 between the test piece and the drum is obtained through the test piece. The radius C3 of the drum is calculated based on A2, B3 and the offset parameter. C3 is then compared with the predetermined radius C of the drum. If C3 is the same as C, the rubber material is wound on the drum and the tire production operation begins.
[0052] This allows for the detection and correction of the diameter data for each tire drum, eliminating the need for operators to frequently check the drum diameter data. This reduces equipment downtime for inspection, lowers operator workload, and improves tire production efficiency. It also avoids the problem of lost drum diameter accuracy due to operator inspection intervals, thus improving tire quality.
[0053] 2. When light passes through a small through-hole, the resulting light spot is smaller, thus reducing measurement error. However, this increases the alignment time between the sensor and the through-hole. Conversely, when light passes through a large through-hole, the resulting light spot is larger, leading to a larger measurement error. However, this reduces the alignment time between the sensor and the through-hole. In practical applications, the appropriate through-hole size should be selected based on the operator's experience and the tire's diameter to maximize both inspection accuracy and production efficiency.
[0054] Obviously, the embodiments described above are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort should fall within the scope of protection of this application.
[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A method for detecting the diameter of a drum, characterized in that, include: During the calibration process, the radius C1 of the drum plate is measured, the distance A1 between the detector and the rotating shaft is obtained through the detector, and the distance B1 between the detector and the drum plate is obtained through the detector. After the drum plate expands or contracts radially, the radius C2 of the drum plate is measured at this time, and the distance B2 between the detector and the drum plate is obtained. The offset parameter of the detector is calculated based on C1, C2, B1, and B2. During the execution process, the distance A2 between the detection component and the rotating shaft is obtained through the detection component. If A2 is the same as A1, the distance B3 between the detection component and the drum plate is obtained through the detection component. The radius C3 of the drum plate is calculated based on A2, B3 and the offset parameter, and C3 is compared with the predetermined radius C of the drum plate. If C3 is the same as C, the rubber material is wound on the drum plate and the tire production operation is carried out.
2. The drum diameter detection method according to claim 1, characterized in that, The drum diameter detection method further includes: When the size of the tire to be processed changes, repeat the calibration process and the execution process. When the size of the tire to be processed remains unchanged, simply repeat the above process.
3. The drum diameter detection method according to claim 1, characterized in that, The drum plate includes a transmission element, and the drum diameter detection method further includes: When the distance between the detector and the rotating shaft is obtained through the detector, the transmitting element is aligned with the detector, and the detection light of the detector passes through the transmitting element to reach the rotating shaft; When the distance between the detector and the drum plate is obtained through the detector, the transmitting element is misaligned with the detector, and the detection light from the detector reaches the drum plate.
4. The drum diameter detection method according to claim 3, characterized in that, The transmitting element is multiple and each has a through hole, with at least two of the transmitting elements having through holes of different sizes. The drum diameter detection method further includes an adjustment process prior to the calibration process, the adjustment process including: The required through-hole size is obtained based on the required error magnitude and the time required for the detection element to align with the through-hole, and the transmitting element is replaced so that the through-hole size of the replaced transmitting element is the same as the required through-hole size.
5. The drum diameter detection method according to claim 1, characterized in that, The drum diameter detection method further includes: If A2 is different from A1, or C3 is different from C, the alarm device will sound an alarm.
6. The drum diameter detection method according to claim 1, characterized in that, The detection element is adjustablely mounted on the mounting bracket, and the drum diameter detection method further includes: When A2 is different from A1, or C3 is different from C, adjust the position of the detection element on the mounting bracket, and repeat the calibration process or the execution process.
7. A drum diameter detection device, characterized in that, include: Rotating shaft (10); Drum assembly (20), the drum assembly (20) is expandably sleeved on the outside of the rotating shaft (10), and the rotating shaft (10) drives the drum assembly (20) to rotate together, the drum assembly (20) includes a plurality of drums arranged in at least one of the circumferential and axial directions; A detection element (30) is positioned toward the drum assembly (20) and is used to detect the distance between the drum assembly and the rotating shaft (10).
8. The drum diameter detection device according to claim 7, characterized in that, The drum plate includes a transmission element (40) through which the detection light of the detection element (30) passes, and the detection element (30) detects the distance between itself and the rotating shaft (10) through the transmission element (40).
9. The drum diameter detection device according to claim 8, characterized in that, The transmitting element (40) has a transmitting structure through which the detection light of the detection element (30) passes, the transmitting structure including at least one of a transparent portion and a through hole.
10. The drum diameter detection device according to claim 8, characterized in that, The drum assembly (20) also includes a frame on which the drum is detachably mounted. There are multiple transmission elements (40), and at least two of the transmission elements (40) have different sizes of transmission structures.
11. The drum diameter detection device according to claim 7, characterized in that, The drum diameter detection device also includes a mounting bracket, and the detection element (30) is adjustablely mounted on the mounting bracket.