Automatic control device, method and system for traction roller

Abstract

The invention discloses a traction roller automatic control device, method and system, and belongs to the technical field of substrate glass manufacturing. The method comprises the following steps: acquiring basic operation data of a traction roller so as to calculate the abrasion loss of the traction roller; calculating the actual diameter of the traction roller through the abrasion loss of the traction roller; operation parameters of the traction roller are adjusted according to the actual diameter of the traction roller, given parameters of equipment are automatically corrected and adjusted, it can be ensured that the traction roller always operates at the stable linear speed, the problems of unstable operation speed, uneven thickness and the like of a glass tape caused by abrasion of the traction roller are solved, and therefore production continuity and stability are guaranteed; the situation of production interruption is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of substrate glass manufacturing, and relates to a traction roll automatic control device, method and system. Background Art

[0002] In the production process of TFT-LCD liquid crystal substrate glass, the treatment of the glass liquid is extremely crucial. When the high-temperature molten glass liquid flows out of the melting furnace, it will enter a specially designed receiving tank. This receiving tank has the function of precisely regulating the flow path and flow rate of the glass liquid, aiming to ensure that the glass liquid can flow stably and orderly. As the glass liquid is continuously injected into the receiving tank, the liquid level in the tank gradually rises until it is full. Thereafter, under the combined influence of gravity and specific process parameters, the glass liquid will overflow downward from the edge of the receiving tank in a uniform and continuous manner. This process needs to maintain a high degree of stability, creating a basic condition for the subsequent formation of high-quality liquid crystal substrate glass.

[0003] However, relying solely on the gravity of the glass liquid itself to achieve overflow is difficult to precisely meet the strict requirements of the finished glass for shape and size. To ensure that the glass can flow along a predetermined trajectory during the overflow process and finally form a liquid crystal substrate glass that meets the production standards, external auxiliary equipment needs to be introduced. Among them, the traction roll device plays a crucial role. The traction roll is usually installed below the overflow path of the glass liquid. By precisely regulating its rotation speed and position, an appropriate traction force can be applied to the overflowing glass ribbon. During this process, part of the traction force comes from the gravity of the glass body, causing it to sag naturally; the other part needs to be achieved by means of the clamping and traction functions of the traction roll. In this way, the glass ribbon can move downward at a stable speed and in a predetermined form under the guidance of the traction roll, and gradually cool and solidify during this process, finally forming the required shape.

[0004] However, in the actual application process of the traction roll, an urgent problem has gradually emerged. Since the surface material of the traction roll needs to be in contact with the high-temperature glass ribbon for a long time and undergo friction, wear inevitably occurs. This wear will cause changes in the physical parameters of the traction roll body, such as diameter, surface roughness, etc. At the same time, the actual operating speed of the traction roll will also deviate from the preset parameters of the mechanical motion control system. Once this deviation exceeds the range allowed by the production process, a series of production problems will occur. For example, the running speed of the glass ribbon will become unstable, the thickness uniformity will be damaged, and defects such as ripples may appear on the surface. In severe cases, it may even lead to the interruption of the production process, bringing significant economic losses to the enterprise. Therefore, a method for automatic control of the traction roll is needed to solve the technical problems in the production process of liquid crystal substrate glass. Summary of the Invention

[0005] The object of the present invention is to provide a self - control device, method and system for a traction roller, so as to solve the technical problem in the prior art that due to the wear of the traction roller, the parameters of its body are inconsistent with the parameter settings of the mechanical motion control system, affecting the production efficiency and production quality.

[0006] To achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present invention provides a self - control device for a traction roller, including two symmetrically arranged traction rollers; a driving component is connected to the tail of each traction roller; both the traction roller and the driving component are installed on a fixed platform; a distance sensor is installed beside the traction roller, and the distance sensor is used to measure the interval displacement between the traction roller and the object in front of it.

[0007] Further, the driving component is a driving reduction motor.

[0008] Further, the fixed platform is a double - layer platform, including a first platform and a second platform; the first platform and the second platform are slidably connected; the traction roller and the driving component are fixedly installed on the first platform.

[0009] Further, the first platform and the second platform are connected by a sliding bearing.

[0010] In the second aspect, the present invention provides a self - control method for a traction roller, based on the above - mentioned self - control device for a traction roller, including the following steps: Obtain the basic operation data of the traction roller, so as to calculate the wear amount of the traction roller; Calculate the actual diameter of the traction roller through the wear amount of the traction roller; Adjust the operation parameters of the traction roller according to the actual diameter of the traction roller.

[0011] Further, the operation basic data includes the linear velocity of the traction roller, the set diameter and the interval displacement between the distance sensor and the traction roller.

[0012] Further, the step of obtaining the basic operation data of the traction roller and thus calculating the wear amount of the traction roller specifically includes: Measure the interval displacement between the traction roller and the object in front of it through the distance sensor, and calculate the wear amount of the traction roller; the specific calculation formula is: S = L1 - L In the formula, S is the wear amount; L1 is the detected displacement; L is the initial displacement.

[0013] Further, the step of calculating the actual diameter of the traction roller through the wear amount of the traction roller specifically includes: Calculate the actual diameter of the traction roller through the set diameter and the wear amount of the traction roller, and the specific calculation formula is: R1 = R - S In the formula, R1 is the actual diameter of the traction roller; R is the set diameter of the traction roller; S is the wear amount of the traction roller.

[0014] Further, the step of adjusting the operating parameters of the traction roller according to the actual diameter of the traction roller specifically includes: Feeding back the actual diameter of the traction roller to the driving component, and recalculating and controlling the rotational speed of the traction roller to maintain the stability of the linear velocity of the traction roller.

[0015] In a third aspect, the present invention provides a self-control module for a traction roller, based on the above-mentioned self-control method for a traction roller, including: A data acquisition module, configured to acquire the basic operating data of the traction roller, so as to calculate the wear amount of the traction roller; A diameter calculation module, configured to calculate the actual diameter of the traction roller through the wear amount of the traction roller; A parameter adjustment module, configured to adjust the operating parameters of the traction roller according to the actual diameter of the traction roller.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a self-control device, method and system for a traction roller. By acquiring the basic operating data to calculate the wear amount, and then obtaining the actual diameter and adjusting the operating parameters, it can adapt to the physical parameter changes caused by the wear of the traction roller in real time. During the production process of TFT-LCD liquid crystal substrate glass, etc., it can ensure that the traction roller always runs at a stable linear velocity, avoid problems such as unstable running speed and uneven thickness of the glass belt caused by the wear of the traction roller, thereby ensuring the continuity and stability of production, reducing the situation of production interruption, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the device of the present invention; Figure 2 It is a schematic diagram of data measurement in an embodiment of the present invention; Figure 3 It is a flowchart of the method of the present invention; Figure 4 It is a schematic diagram of the principle of the system of the present invention; Figure 5 It is a schematic structural diagram of the fixed platform of the present invention.

[0019] Wherein: 1 - driving reduction motor; 2 - traction roller; 3 - fixed platform; 4 - distance sensor; 5 - first platform; 6 - second platform. Detailed implementation manners

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention generally described and illustrated in the accompanying drawings herein may be arranged and designed in a variety of different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0022] It should be noted that: like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0023] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0024] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0025] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if the terms "set", "installed", "connected", and "coupled" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The present invention will be further described in detail below with reference to the accompanying drawings: See Figure 1 , an automatic control device for a traction roller disclosed in an embodiment of the present invention includes two symmetrically arranged traction rollers 2; a driving component is connected to the tail of each of the traction rollers 2, and the driving component is a driving reduction motor 1; the traction rollers 2 and the driving components are both installed on a fixed platform 3; a distance sensor 4 is installed beside the traction roller 2, and the distance sensor 4 is used to measure the interval displacement between the traction roller 2 and the one before it. The fixed platform 3 is a double-layer platform, including a first platform 5 and a second platform 6; the first platform 5 and the second platform 6 are connected by a sliding bearing; the traction rollers 2 and the driving components are fixedly installed on the first platform 5, as Figure 5 shown; the top first platform 5 can drive the traction roller 2 to move in the y-axis direction, and a guide rail is installed at the bottom of the second platform 6, which can make the second platform 6 move in the x-axis direction.

[0027] See Figure 3 , an automatic control method for a traction roller disclosed in an embodiment of the present invention, based on the above automatic control device for a traction roller, includes the following steps: S1. Obtain the basic operation data of the traction roller 2, so as to calculate the wear amount of the traction roller 2; In this step, the basic operation data includes the linear velocity of the traction roller 2, the set diameter, and the interval displacement between the distance sensor 4 and the traction roller 2.

[0028] The interval displacement between the traction roller 2 and the one before it is measured by the distance sensor 4, and the wear amount of the traction roller 2 is calculated; the specific calculation formula is: S = L1 - L In the formula, S is the wear amount; L1 is the detected displacement; L is the initial displacement.

[0029] S2. Calculate the actual diameter of the traction roller 2 through the wear amount of the traction roller 2; The actual diameter of the traction roller 2 is calculated through the set diameter and the wear amount of the traction roller 2, and the specific calculation formula is: R1 = R - S Wherein, R1 is the actual diameter of the traction roller 2; R is the set diameter of the traction roller 2; S is the wear amount of the traction roller 2.

[0030] S3. Adjust the operating parameters of the traction roller 2 according to the actual diameter of the traction roller 2.

[0031] Feed back the actual diameter of the traction roller 2 to the drive component, recalculate and control the rotational speed of the traction roller 2 to maintain the stability of the linear velocity of the traction roller 2.

[0032] See Figure 4 , an embodiment of the present invention discloses a self-control module for a traction roller. Based on the above-mentioned self-control method for a traction roller, it includes a data acquisition module, a diameter calculation module, and a parameter adjustment module.

[0033] Among them, the data acquisition module is used to acquire the basic operating data of the traction roller 2, so as to calculate the wear amount of the traction roller 2; in this module, the distance sensor 4 for ranging preferably adopts an ultrasonic sensor, a laser sensor or an infrared sensor; the ultrasonic sensor measures the distance by emitting ultrasonic waves and receiving the reflected waves, the laser sensor emits a short pulse of laser beam, when the laser beam irradiates the surface of the target object, part of the light will be reflected back, by recording and processing the time elapsed from the emission of the light pulse to the reception of the return, the distance of the measured object can be determined based on the speed of light and time. The infrared sensor measures the distance by emitting infrared rays and detecting the reflected light. The diameter calculation module is used to calculate the actual diameter of the traction roller 2 through the wear amount of the traction roller 2; the parameter adjustment module is used to adjust the operating parameters of the traction roller 2 according to the actual diameter of the traction roller 2.

[0034] The working principle of the present invention is as follows: The device of the present invention includes a mechanical motion control system, a data detection system, and a data processing system. When the traction roller 2 equipment body is operating, the vibration amount and offset amount of the base of the traction roller 2 are monitored by the distance sensor 4, the basic operating data of the traction roller 2 is acquired, and the wear consumption amount of the traction roller 2 is calculated and processed. By comparing with the data of the mechanical motion control system, the given parameters of the equipment are automatically corrected and adjusted to ensure the long-term stable operation of the traction roller.

[0035] The mechanical motion control system includes a drive reduction motor 1, a traction roller 2, and a fixed platform 3. The drive reduction motor 1 is connected to the connecting block at the tail of the traction roller 2, and the operation of the drive reduction motor 1 drives the traction roller 2 to rotate; the fixed platform 3 is composed of two layers and is connected by a sliding bearing in the middle, which can realize flexible left and right sliding; the drive reduction motor 1 and the traction roller 2 are jointly fixed on the fixed platform 3.

[0036] The data detection system consists of a distance sensor 4, which has the functions of detecting the displacement, vibration, and distance difference of the device. Taking the laser sensor as an example, the laser sensor emits laser light, which irradiates on the surface of the traction roller 2. The signal receiver of the laser sensor converts the laser length into a voltage signal, and the voltage signal is converted into the actual interval displacement between the traction roller 2 and the laser sensor.

[0037] The data processing system includes the operation data of the traction roller 2 equipment body, the detection data of the distance sensor 4, and the parameter operation of the traction roller 2 equipment body. In the present invention, it is stipulated that the set diameter of the traction roller 2 equipment body is R, the actual diameter of the traction roller 2 equipment body is R1, the wear amount of the traction roller 2 is S, the initial displacement between the traction roller 2 and the distance sensor 4 is L, and the detected displacement between the traction roller 2 and the distance sensor 4 is L1. The linear velocity V of the traction roller 2 = 2ΠR / T. When the traction roller wears, the actual diameter R1 is not equal to the set diameter R, which will necessarily cause a difference in velocity V. To achieve the normal operation of the equipment parameters, it is necessary to continuously correct the set diameter R and introduce the correct actual diameter R1. When the wear amount of the traction roller 2 is greater than zero, the wear amount S = detected displacement L1 - initial displacement L, and the actual diameter R1 of the traction roller 2 = set diameter R - wear amount S.

[0038] The data processing system feeds back the correct actual diameter R1 to the mechanical motion control system to automatically correct the operation parameters of the traction roller 2 and realize the automatic control principle of the traction roller.

[0039] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A traction roller automatic control device, characterized in that: The invention comprises two symmetrically arranged traction rollers (2); the tail of each traction roller (2) is connected to a driving component; the traction roller (2) and the driving component are both mounted on a fixed platform (3); a distance sensor (4) is mounted on one side of the traction roller (2), and the distance sensor (4) is used to measure the distance displacement between the traction roller (2) and the traction roller.

2. The automatic control device for traction roller according to claim 1, characterized in that: The driving component is a driving reduction motor (1).

3. The automatic control device for traction roller according to claim 1, characterized in that: The fixed platform (3) is a double-layer platform, comprising a first platform (5) and a second platform (6); the first platform (5) and the second platform (6) are slidably connected; the traction roller (2) and the driving component are fixedly mounted on the first platform (5).

4. The automatic control device for traction roller according to claim 3, characterized in that: The first platform (5) and the second platform (6) are connected via a sliding bearing.

5. A traction roller automatic control method, characterized in that: A traction roller automatic control device according to any one of claims 1 to 4, comprising the following steps: Obtaining basic operating data of the traction roller (2), thereby calculating the amount of wear of the traction roller (2); Calculating the actual diameter of the traction roller (2) based on the wear amount of the traction roller (2); The operating parameters of the traction roller (2) are adjusted according to the actual diameter of the traction roller (2).

6. A traction roller automatic control method according to claim 5, characterized in that: The basic operation data include the linear speed of the traction roller (2), the set diameter and the interval displacement between the distance sensor (4) and the traction roller (2).

7. A traction roller automatic control method according to claim 5, characterized in that: The step of obtaining the basic operating data of the traction roller (2) and thereby calculating the wear amount of the traction roller (2) specifically comprises: The distance sensor (4) is used to measure the distance displacement between the traction roller (2) and the traction roller (2), and the wear amount of the traction roller (2) is calculated. The specific calculation formula is: S=L1-L Where S is the wear amount; L1 is the detection displacement; L is the initial displacement.

8. A traction roller automatic control method according to claim 5, characterized in that: The step of calculating the actual diameter of the traction roller (2) by the wear amount of the traction roller (2) specifically comprises: The actual diameter of the traction roller (2) is calculated based on the set diameter and wear amount of the traction roller (2). The specific calculation formula is: R1=RS In the formula, R1 is the actual diameter of the traction roller (2); R is the set diameter of the traction roller (2); and S is the wear amount of the traction roller (2).

9. A traction roller automatic control method according to claim 5, characterized in that: The step of adjusting the operating parameters of the traction roller (2) according to the actual diameter of the traction roller (2) specifically comprises: The actual diameter of the traction roller (2) is fed back to the driving component, and the rotation speed of the traction roller (2) is recalculated and controlled to maintain the linear speed of the traction roller (2) stable.

10. A traction roller automatic control module, characterized in that: A traction roller automatic control method according to any one of claims 5 to 9, comprising: A data acquisition module, used to acquire basic operating data of the traction roller (2), thereby calculating the wear amount of the traction roller (2); A diameter calculation module, used to calculate the actual diameter of the traction roller (2) based on the wear amount of the traction roller (2); A parameter adjustment module is used to adjust the operating parameters of the traction roller (2) according to the actual diameter of the traction roller (2).

Images