Method and device suitable for detecting transverse cutting quality of float glass

Abstract

The invention belongs to the technical field of float glass defect detection, and relates to a method and device suitable for float glass transverse cutting quality detection, and the method comprises the following steps: in the float glass transverse cutting process, obtaining sound generated by glass breaking, and determining the float glass transverse cutting quality according to the sound intensity. According to the method for judging the transverse breaking quality of the glass through the sound, the method and the device can reflect the subtle change of the breaking quality through the breaking sound, then the transverse breaking quality of the glass is judged, the adverse change trend of the transverse breaking quality can be detected in time, an operator adjusts the cutting pressure value in advance for prevention, and the working efficiency is improved. The transverse breaking strength is kept stable, and the quality influence caused by abnormal annealing is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of float glass defect detection, and in particular to a method and device suitable for cross-cut quality detection of float glass. Background Art

[0002] Currently, controlling poor cross-cutting and breaking quality during the cross-cutting and breaking processes on the float glass cold end production line is difficult. The main reasons are: 1. There is no annealing status feedback at the hot end, and the cold end lacks annealing stress distribution data, making it impossible to understand annealing changes. 2. Quality control relies heavily on manual labor, making it difficult to immediately detect changes in breaking quality. Operator experience is heavily relied upon, and abnormal response is relatively delayed. 3. Poor breaking quality can only be corrected after it is discovered, without the ability to predict and correct it in advance, which is a disadvantage. 4. After annealing at the hot end, the glass is transferred to the cold end. Due to the lack of relevant testing equipment at the cold end, temperature measurement can only be performed on a scheduled or random basis, making it impossible to immediately detect abnormal fluctuations. Exacerbated glass breaking abnormalities can lead to poor quality, such as self-cracks, crooked edges, cracks, and concave and convex edges. If not detected in time, it can cause serious quality problems and disrupt the orderly progress of production tasks.

[0003] The existing technology has the following disadvantages: 1. It is impossible to monitor the changes in the glass annealing state in real time. Due to the lack of annealing stress distribution data, it is impossible to grasp the annealing changes in a timely manner.

[0004] 2. Quality control is highly dependent on manual labor. Changes in breaking quality cannot be discovered immediately, and abnormal response efficiency is low, which is heavily dependent on the operator's work experience.

[0005] 3. Existing temperature measurement methods, such as infrared temperature gun measurement, have large measurement time intervals and low accuracy, and cannot accurately and objectively reflect the changes in glass annealing. Summary of the Invention

[0006] In order to overcome the above-mentioned defects, the present application proposes a method and device for judging the transverse breakage quality of glass by sound, and timely detecting the poor transverse cutting and breaking quality of float cold end glass, that is, a method and device for detecting poor transverse cutting and breaking quality of float cold end glass.

[0007] The method for detecting the cross-cut quality of float glass provided in the embodiment of the present application includes: During the float glass cross-cutting process, the sound generated by the glass breaking is obtained, and the quality of the float glass cross-cutting is judged based on the sound intensity.

[0008] Furthermore, when the sound intensity falls within a preset threshold range, the quality of the float glass cross-cutting is good; otherwise, the quality of the float glass cross-cutting is poor.

[0009] Furthermore, the step also includes adjusting the cutting blade pressure value according to the sound intensity to stabilize the cross-cutting quality of the float glass; if the sound intensity does not fall within the preset threshold range, the sound intensity is increased by adjusting the cutting blade pressure value.

[0010] Furthermore, parameters that affect the determination of the knife pressure range include: glass thickness, plate width, sound intensity, and cross-cutting knife wheel angle.

[0011] Furthermore, the step also includes dividing the sound intensity by a preset standard sound intensity to obtain a sound intensity ratio. When the sound intensity ratio is less than or equal to 1, the quality of the float glass cross-cut is good; otherwise, the quality of the float glass cross-cut is poor.

[0012] On the other hand, an embodiment of the present application provides a device for detecting the cross-cut quality of float glass, comprising a sound intensity detection module and a processor. The sound intensity detection module is used to obtain the sound intensity generated by the glass breaking during the cross-cutting process of the float glass and generate a corresponding electrical signal; The processor is used to judge the quality of cross-cutting of float glass according to the electrical signal corresponding to the sound intensity.

[0013] Furthermore, the processor is further configured to calculate a cutting blade pressure value according to the sound intensity, and the cutting blade pressure value is used to adjust or maintain the quality of cross-cutting of float glass.

[0014] Furthermore, it also includes a control module, which is electrically connected to the processor and the cutting bridge respectively, and is used to control the cutting bridge according to the cutting blade pressure value.

[0015] Furthermore, the sound intensity detection module includes a sound intensity detection probe and a signal conversion module; The sound intensity detection probe is used to detect the sound generated by the breaking of glass during the cross-cutting process of float glass; The signal conversion module is used to convert the acquired sound signal into an electrical signal and output the electrical signal to the processor.

[0016] Furthermore, it also includes an alarm device, which is electrically connected to the processor and is used to issue an alarm prompt when the sound intensity exceeds a preset alarm range.

[0017] Compared with the prior art, the beneficial effects of the present application are: the method and device of the present invention can reflect subtle changes in the breaking quality through the breaking sound, and then judge the transverse breaking quality of the glass, and can timely detect adverse changes in the transverse breaking quality. The operator can adjust the cutting pressure value in advance for prevention, so that the transverse breaking strength remains stable and reduce the quality impact caused by annealing abnormalities. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the steps of the method for detecting cross-cut quality of float glass in Example 1 of the present application; Figure 2 This is a schematic diagram of a method for obtaining the sound of float glass breaking in Example 1 of the present application; Figure 3 This is the step of controlling the cross-cutting quality by looking up the data in Table 1 in Example 1 of the present application; Figure 4 This is a schematic diagram of a device suitable for cross-cut quality inspection of float glass in Example 2 of the present application. DETAILED DESCRIPTION

[0019] The present application is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as limiting the scope of the above-mentioned subject matter of the present application to the following embodiments. All technologies implemented based on the content of the present application fall within the scope of protection of the present application.

[0020] Unless otherwise specified, in the description of the specific embodiments of this application, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", and "side" are based on the expression of the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product / device / apparatus is placed when it is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of this application or simplifying the description in the specific embodiments to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore should not be understood as limiting this application.

[0021] In the description of the embodiments of this application, the technical terms "first," "second," etc., merely distinguish one entity or operation from another and are not to be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "plurality" means two or more, unless otherwise specifically defined.

[0022] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] Example 1 Please see Figure 1 , Figure 1 A schematic diagram of the steps of a method for detecting the cross-cut quality of float glass provided in an embodiment of the present application. A method for detecting the cross-cut quality of float glass comprises at least the following steps: during the cross-cutting process of the float glass, detecting the sound generated by the glass breaking, and determining the quality of the cross-cutting of the float glass based on the intensity of the sound. Currently, the main method in the art is to monitor the cross-cutting and breaking status of the float glass by detecting the relative positional relationship between the float glass and the cutting device, thereby determining the cutting quality. For example, the patent "A Monitoring and Alarming Device for the Cross-cutting and Breaking Status of Glass" (Publication No.: CN219099002U) discloses a monitoring and alarming device for the cross-cutting and breaking status of glass, comprising: a feed trough, at least three laser temperature sensors, an alarm, and a controller. The feed trough is located below the end of the glass conveyor, and the at least three laser temperature sensors are installed on the feed trough at intervals along the conveying direction of the glass. The distance from the first laser temperature sensor of the at least three laser temperature sensors to the cutting line of the glass cut by the cutting blade of the cross-cutting mechanism is greater than or equal to a preset length of the glass sheet. The at least three laser temperature sensors are each connected to a controller for signal signals, and the controller is control-connected to the alarm. This utility model can monitor the cross-cutting and breaking status of glass in real time, and promptly alert staff when the glass flow is too long, thereby avoiding interruptions in production. The patent "A Broken Plate Detection Method for Float Glass Production" (Publication No.: CN114002271B) discloses a broken plate detection method for float glass production. An automatic broken plate detection and alarm device is installed on a steel roller. The change in the contact point of the telescopic probe head when there is a broken plate is captured by the change in the voltage signal, and the signal is transmitted to the buzzer alarm to realize automatic detection and alarm of broken glass plates. This eliminates the need for operators to monitor the operation of the glass plates with the naked eye for a long time, avoids the on-duty staff from failing to detect broken plates due to fatigue, and causes full tank accidents, thereby avoiding greater losses to the company. The present invention has the characteristics of accurate detection and simple operation, and is suitable for large-scale promotion and application. The solution of the present invention breaks through the inherent thinking in the existing technology. It does not start from the relative position relationship, but judges the quality of the cross-cutting and breaking of glass by sound.

[0024] The problem with judging the quality of glass cross-cutting and breaking by sound is that the intensity of the sound is affected by differences in the operator's hearing. This relies entirely on manual judgment, making it impossible to form an objective, universal method or accurately determine whether the cross-cutting and breaking are in optimal condition. Furthermore, due to the high intensity of the cross-cutting sound, prolonged listening can seriously damage hearing.

[0025] Furthermore, a schematic diagram of a method for obtaining the sound of float glass breaking is shown as follows: Figure 2After obtaining the snapping sound, the sound intensity of the snapping sound is divided by a preset standard sound intensity to obtain a sound intensity ratio. When the sound intensity ratio is less than or equal to 1, the float glass cross-cutting quality is good; otherwise, the float glass cross-cutting quality is poor. When the sound intensity ratio is less than or equal to 1, the cutting blade pressure value remains unchanged. When the sound intensity ratio is greater than 1 and less than or equal to 2, the cutting blade pressure value range is adjusted so that the average sound intensity is less than or equal to 1, ensuring that the glass cross-cutting quality remains stable within a good range.

[0026] Furthermore, the preset standard sound intensity is obtained by obtaining multiple breaking sounds and then calculating the average value, and the breaking quality is good when the breaking sounds are obtained.

[0027] Furthermore, instead of directly dividing the sound intensity of the breaking sound by the preset standard sound intensity to obtain the sound intensity ratio, the sound intensities of the breaking sounds obtained multiple times are averaged and then divided by the preset standard sound intensity to eliminate errors by obtaining the average.

[0028] Preferably, in addition to considering the sound intensity when adjusting the cutting blade pressure value, other parameters that need to be considered include: glass thickness, plate width, sound intensity and cross-cutting blade wheel angle, and the blade wheel service life mileage is less than 150km. An example of a cross-cutting blade pressure adjustment range is shown in Table 1. After obtaining the parameter values of glass thickness, plate width, sound intensity and cross-cutting blade wheel angle, the range of cross-cutting blade pressure adjustment can be clearly known by looking up the table. Prevention of poor cross-cutting breaking quality is achieved by adjusting the cross-cutting blade pressure value. By looking up the data in Table 1, the steps for controlling the cross-cutting breaking quality are as follows: Figure 3 shown.

[0029] Table 1 Example of cross-cutting knife pressure adjustment range

[0030] As can be seen from Table 1, in addition to judging the breaking quality by the sound intensity ratio, the breaking quality can also be directly judged by the sound intensity during breaking, and then the cross-cutting knife pressure value can be adjusted.

[0031] This method more objectively reflects subtle variations in breaking quality, reducing operator judgment and eliminating individual hearing differences. It can promptly detect adverse trends in cross-breaking quality, allowing operators to proactively adjust cutting pressure to maintain stable cross-breaking strength and minimize the impact of annealing anomalies. Further challenges lie in improving production efficiency, enhancing the efficiency of abnormal response, and ensuring traceability of data records to facilitate subsequent analysis and process optimization.

[0032] Example 2 This embodiment provides a device suitable for detecting the cross-cut quality of float glass. The schematic diagram of the device is shown in FIG. Figure 4 As shown. It includes a sound intensity detection module and a processor, The sound intensity detection module is used to obtain the electrical signal corresponding to the sound generated by the glass breaking during the cross-cutting process of the float glass; The processor is configured to determine the quality of cross-cut float glass based on an electrical signal. After acquiring the electrical signal, the processor divides a signal value corresponding to the sound intensity of the breaking sound by a signal value corresponding to a preset standard sound intensity to obtain a sound intensity ratio. When the sound intensity ratio is less than or equal to 1, the cross-cut float glass quality is good; otherwise, the cross-cut float glass quality is poor.

[0033] Furthermore, the processor is further configured to calculate a cutting blade pressure value based on the signal value corresponding to the sound intensity. The cutting blade pressure value is used to adjust or maintain the quality of cross-cutting of float glass. For example, after acquiring the electrical signal, the processor divides the signal value corresponding to the sound intensity of the breaking sound by the signal value corresponding to a preset standard sound intensity to obtain a sound intensity ratio. This sound intensity ratio is then used to calculate a reasonable cutting blade pressure value.

[0034] Furthermore, the sound intensity detection module includes a sound intensity detection probe and a signal conversion module; the sound intensity detection probe is used to obtain the sound generated by glass breaking during the cross-cutting process of float glass; the signal conversion module is used to convert the obtained sound signal into an electrical signal and output the electrical signal to the processor.

[0035] Preferably, a sound intensity detection probe is positioned in the transverse breaking area to detect the sound intensity during transverse breaking in real time. A signal conversion module is electrically connected to the sound intensity detection probe and is configured to convert the detected sound intensity signal into an electrical signal. Upon receiving the electrical signal, the processor calculates the sound intensity ratio and outputs a control signal to control the quality of the cross-cutting of the float glass.

[0036] In addition, it also includes a display screen, which is electrically connected to the processor and is used to display the sound intensity ratio of each break, so that the operator can clearly understand the trend of changes in the breaking quality.

[0037] The system also includes an alarm device electrically connected to the processor and configured to issue an alarm when the mean sound intensity exceeds a preset range. This alarm is typically provided by a warning light electrically connected to the processor that emits a light alarm when the sound intensity ratio exceeds or falls below a preset acceptable range. An audible alarm can also be used to alert the operator. The system also includes a storage module electrically connected to the processor that automatically records the sound intensity ratio for each break, facilitating subsequent analysis and process optimization. A power supply is also included to provide power to the entire system.

[0038] It also includes a control module, which is electrically connected to the processor and the cutting bridge and is used to control the pressure of the cutting bridge according to the cutting blade pressure value.

[0039] It also includes a temperature detection module arranged in the horizontal bending area to detect the lateral temperature of the glass. The temperature data can also be displayed on the LCD screen to provide a basis for evaluating the annealing status.

[0040] The device's operating principle is as follows: a sound intensity detection probe measures the sound intensity during transverse breaking in real time and outputs an electrical signal corresponding to the sound intensity. A processor converts the signal into a sound intensity ratio, which is displayed on an LCD screen for each break. When the sound intensity ratio exceeds or falls below a preset acceptable range, an alarm indicator emits an audible and visual alarm to alert the operator. The processor also calculates the appropriate blade pressure based on the sound intensity ratio and displays it on the LCD screen. The operator can adjust the cutting bridge pressure based on the displayed blade pressure value through the control module. A storage module automatically records the quality score data for each break for subsequent analysis and process optimization. A temperature detection module monitors the transverse temperature of the glass, which is also displayed on the LCD screen to provide a basis for evaluating the annealing condition.

[0041] Compared with the prior art, the present invention provides a device for preventing and detecting poor quality of cross-cutting and cross-breaking of online flat glass, which has the following beneficial effects: 1. It can monitor the changes in sound intensity during cross-breaking in real time, simulate the sound intensity ratio through signal conversion, timely reflect the trend of change in breaking quality, and effectively grasp the changes in annealing state; 2. By automatically recording the sound intensity ratio of each break and setting a reasonable value range, when the sound intensity ratio exceeds or falls below the set range, the data can be locked and an audible and visual alarm can be triggered, reducing the reliance on human subjective judgment, eliminating the influence of individual hearing differences, and improving the objectivity and accuracy of quality control; 3. It can detect poor cross-breaking quality in a timely manner, allowing operators to adjust the cutting bridge pressure value in advance for prevention, reducing the quality impact caused by abnormal breaking, and improving the efficiency of abnormal response. 4. By calculating a reasonable cutting blade pressure value and providing it to the operator for reference, it provides a basis for adjusting the cutting blade pressure value, which is conducive to maintaining the cross-cutting and cross-breaking in the best state; 5. It automatically records the sound intensity ratio data during breaking, with good data traceability, facilitating subsequent data analysis and process optimization, and improving production efficiency.

[0042] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A method for detecting the cross-cut quality of float glass, characterized in that: include: During the float glass cross-cutting process, the sound generated by the glass breaking is obtained, and the quality of the float glass cross-cutting is judged based on the sound intensity.

2. The method for detecting cross-cut quality of float glass according to claim 1, wherein: When the sound intensity falls within a preset threshold range, the quality of the float glass cross-cutting is good; otherwise, the quality of the float glass cross-cutting is poor.

3. The method for detecting cross-cut quality of float glass according to claim 2, wherein: The steps also include adjusting the cutting blade pressure value according to the sound intensity to ensure stable cross-cutting quality of the float glass; If the sound intensity does not fall within the preset threshold range, the sound intensity is increased by adjusting the cutting blade pressure value.

4. The method for detecting cross-cut quality of float glass according to claim 3, wherein: Parameters that affect the determination of the knife pressure range include: glass thickness, plate width, sound intensity, and cross-cutting knife wheel angle.

5. The method for detecting cross-cut quality of float glass according to claim 1, wherein: The step further includes dividing the sound intensity by a preset standard sound intensity to obtain a sound intensity ratio, and when the sound intensity ratio is less than or equal to 1, the quality of the cross-cutting of the float glass is good; Otherwise; the quality of float glass cross-cutting is poor.

6. A device suitable for detecting the cross-cut quality of float glass, characterized in that: Including sound intensity detection module and processor, The sound intensity detection module is used to obtain the sound intensity generated by the glass breaking during the cross-cutting process of the float glass and generate a corresponding electrical signal; The processor is used to judge the quality of cross-cutting of float glass according to the electrical signal corresponding to the sound intensity.

7. The device for detecting cross-cut quality of float glass according to claim 6, wherein: The processor is further configured to calculate a cutting blade pressure value according to the sound intensity, and the cutting blade pressure value is used to adjust or maintain the quality of cross-cutting of float glass.

8. The device for detecting cross-cut quality of float glass according to claim 7, wherein: It also includes a control module, which is electrically connected to the processor and the cutting bridge respectively, and is used to control the cutting bridge according to the cutting blade pressure value.

9. The device for detecting cross-cut quality of float glass according to claim 6, wherein: The sound intensity detection module includes a sound intensity detection probe and a signal conversion module; The sound intensity detection probe is used to detect the sound generated by the breaking of glass during the cross-cutting process of float glass; The signal conversion module is used to convert the acquired sound signal into an electrical signal and output the electrical signal to the processor.

10. The device for detecting cross-cut quality of float glass according to claim 8, wherein: It also includes an alarm device, which is electrically connected to the processor and is used to issue an alarm when the sound intensity exceeds a preset alarm range.

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