A substrate glass bending degree detection device

Abstract

The utility model discloses a kind of substrate glass bending degree detection devices, belong to substrate glass manufacturing technical field.The substrate glass bending degree detection device provided by the utility model, including base, scale, L type baffle and movable first tight unit, when detecting substrate glass bending degree, first baffle is perpendicular to the substrate glass to be measured, second baffle is parallel to the substrate glass to be measured, one end of the substrate glass to be measured is close to first baffle, other end is close to first tight unit;By mechanical contact type measurement to substrate glass to be measured, bending data is directly obtained, the detection of substrate glass flow direction and non flow direction bending degree is realized, the limitation that the detection range of substrate glass bending degree is not comprehensive, detection precision is susceptible to external factor interference caused by temperature difference detection method is eliminated.

Description

Technical Field

[0001] This utility model relates to the field of substrate glass manufacturing technology, and specifically to a substrate glass curvature detection device. Background Technology

[0002] The overflow pull-down method is one of the main methods for producing liquid crystal substrate glass. This method involves mixing raw materials in a specific ratio, heating them to a molten state, and then conveying the mixture through a platinum pipe to an overflow tank. Once the overflow tank is full, the molten glass overflows and flows along the side walls to a confluence at the tip. Under the pull of a rear clamping and traction device, a single sheet of substrate glass is formed. A key advantage of this method is that the substrate glass surface does not come into contact with any other material during production, resulting in excellent flatness and smoothness, eliminating the need for subsequent processing such as grinding or polishing.

[0003] When the substrate glass flows through the forming furnace and annealing furnace, the glass shrinkage is smaller in the middle of the furnace due to better insulation (i.e., a smaller cooling gradient). Conversely, the glass shrinkage is larger at the edges due to poorer insulation. However, the middle and edges of the substrate glass are integral, and this difference in shrinkage directly results in unequal overall glass lengths—the middle glass is longer than the edge glass. This means the edge glass restricts the extension of the middle glass, ultimately causing it to bend (bulge or depression) due to space constraints. Without considering the influence of external equipment such as forming and cutting, the appearance of bulges or depressions in the middle of the substrate glass is called substrate glass bending, and the degree of bending is called the substrate glass curvature. Depending on the substrate glass orientation, this can be divided into flow-direction bending and non-flow-direction bending.

[0004] To better characterize the curvature of the substrate glass, it is necessary to test the glass curvature. In actual production, the temperature difference detection method is usually used to characterize the curvature. The temperature difference detection method refers to symmetrically placing thermocouples on both sides of the center line of the annealing furnace. Because the substrate glass has non-flow direction curvature, the distance between the thermocouples and the substrate glass on the left and right sides is not equal, that is, the temperature detected by the thermocouples on the left and right sides is different, forming a temperature difference. This temperature difference can be used to characterize the non-flow direction curvature.

[0005] However, existing temperature difference detection methods have the following limitations: First, they can only monitor the non-flow curvature of the substrate glass, making it difficult to comprehensively assess the product's curvature. Second, the detection accuracy is easily affected by external factors such as airflow disturbances in the annealing furnace and shaking during the cross-cutting process, which can directly cause temperature fluctuations in the thermocouple, leading to deviations in the curvature detection results and affecting the accurate judgment of the substrate glass's curvature. Summary of the Invention

[0006] The purpose of this invention is to provide a substrate glass curvature detection device to overcome the problems of incomplete substrate glass curvature detection range and easy interference of external factors in the detection accuracy caused by the temperature difference detection method in the prior art.

[0007] The present invention solves the above-mentioned technical problems through the following technical solution: This utility model provides a substrate glass curvature detection device, including a base, a scale, an L-shaped baffle, and a movable first clamping unit. The L-shaped baffle is disposed on the base and includes a first baffle and a second baffle that are vertically connected. The first clamping unit is disposed at the end of the base away from the first baffle and is used to move along a direction parallel to the substrate glass to be tested. The scale is disposed on the upper surface of the base, and the intersection of the scale and the second baffle is the zero point position. When testing the curvature of the substrate glass, the first baffle is perpendicular to the substrate glass to be tested, the second baffle is parallel to the substrate glass to be tested, one end of the substrate glass to be tested is in close contact with the first baffle, and the other end is in close contact with the first clamping unit.

[0008] A further improvement of this invention is that it also includes a movable second clamping unit, which is used to move along a direction perpendicular to the glass substrate to be tested. When testing the curvature of the substrate glass, the clamping part of the second clamping unit is tangent to the outer arc surface of the substrate glass to be tested.

[0009] A further improvement of this utility model is that the second clamping unit is an L-shaped structure, the vertical part of the L-shaped structure serves as the clamping part of the second clamping unit; the horizontal part of the L-shaped structure is parallel to the upper surface of the base; and the second clamping unit is made of transparent polymer material.

[0010] A further improvement of this invention is that the transparent polymer material includes, but is not limited to, plexiglass.

[0011] A further improvement of this utility model is that it also includes a fixed baffle. The first clamping unit includes an adjusting bolt and a movable baffle. The fixed baffle is set on the base and is parallel to the first baffle. The fixed baffle is provided with a through hole, and the movable baffle is provided with a blind hole. When checking the curvature of the substrate glass, the adjusting bolt passes through the through hole and locks into the blind hole on the movable baffle.

[0012] A further improvement of this invention is that the fixing baffle is made of a metal or alloy material with high rigidity.

[0013] A further improvement of this utility model is that the base is made of inorganic non-metallic material.

[0014] A further improvement of this invention is that the inorganic non-metallic materials include, but are not limited to, marble.

[0015] A further improvement of this invention is that the length of the substrate glass to be tested ranges from 500 to 1000 mm, and the width of the substrate glass to be tested ranges from 100 to 200 mm.

[0016] A further improvement of this invention is that the L-shaped baffle and the movable first clamping unit are made of a rigid metal or alloy material.

[0017] Compared with the prior art, the positive and progressive effects of this utility model are as follows: The substrate glass curvature detection device provided by this utility model includes a base, a scale, an L-shaped baffle, and a movable first clamping unit. When detecting the curvature of the substrate glass, the first baffle is perpendicular to the substrate glass to be tested, and the second baffle is parallel to the substrate glass to be tested. One end of the substrate glass to be tested is in close contact with the first baffle, and the other end is in close contact with the first clamping unit. By mechanically contacting the substrate glass to be tested, the curvature data is directly obtained, realizing the detection of the curvature of the substrate glass in both the flow direction and non-flow direction. This eliminates the limitations of the temperature difference detection method, which results in an incomplete detection range of substrate glass curvature and the detection accuracy being easily affected by external factors. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0019] Figure 1 This is a top view of a substrate glass curvature detection device according to the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the second clamping unit in a specific embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the detection process of a specific embodiment of the present invention.

[0022] The components include: 1. base; 2. first baffle; 3. second baffle; 4. movable baffle; 5. adjusting bolt; 6. scale; 7. second clamping unit; 8. glass substrate to be tested; 9. fixed baffle; and 10. clamping part. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] The present invention will be further described in detail below with reference to the accompanying drawings. The description is intended to explain the present invention and not to limit it.

[0030] See Figure 1A substrate glass curvature detection device includes a base 1, a scale 6, an L-shaped baffle, and a movable first clamping unit. The L-shaped baffle is disposed on the base 1 and includes a first baffle 2 and a second baffle 3 connected vertically. The first clamping unit is disposed at the end of the base 1 away from the first baffle 2 and is used to move along a direction parallel to the substrate glass 8 to be tested. The scale 6 is disposed on the upper surface of the base 1, and the intersection of the scale 6 and the second baffle is the zero point position. When testing the curvature of the substrate glass, the first baffle 2 is perpendicular to the substrate glass 8 to be tested, the second baffle 3 is parallel to the substrate glass 8 to be tested, one end of the substrate glass 8 to be tested is in close contact with the first baffle, and the other end is in close contact with the first clamping unit.

[0031] The L-shaped baffle is a positioning reference component composed of a vertical and a horizontal plane. The first baffle 2 constrains the perpendicularity of the substrate glass end face, and the second baffle 3 provides the zero-point reference for the scale 6. The first clamping unit is a clamping mechanism that can move along the length of the substrate glass. By adjusting its position, the substrate glass is kept flat, eliminating the influence of installation gaps on the measurement results. The scale 6 is a linear measuring tool with graduations; its zero point is aligned with the edge of the second baffle 3, used to directly read the curvature of the substrate glass. During testing, one end of the substrate glass 8 to be tested is pressed tightly against the first baffle 2, and the other end is clamped with a force parallel to the substrate glass through the first clamping unit, ensuring that the substrate glass is in a stress-free fixed state. The curvature value is obtained by observing the scale 6. This solution eliminates the defects of thermocouples being affected by environmental interference through mechanical contact measurement, and can directly obtain the curvature data of the substrate glass in both the flow direction and non-flow direction. By using a fixed reference and an adjustable clamping mechanism in conjunction with the scale 6 reading, a unified measurement reference is established, avoiding errors introduced by manual visual judgment.

[0032] Through the above technical solution, this application realizes the detection of the flow direction and non-flow direction curvature of the substrate glass. The measurement process is not affected by the airflow of the annealing furnace or the vibration of the equipment. The operation is simple and the data reliability is improved. The direct contact measurement eliminates the error of indirect signal conversion. The reading of the 6-scale of the scale intuitively reflects the actual deformation, providing accurate data support for the adjustment of the production process.

[0033] In a specific embodiment of this utility model, a movable second clamping unit 7 is further included, which is used to move along a direction perpendicular to the glass substrate 8 to be tested; When testing the curvature of the substrate glass, the clamping part 10 of the second clamping unit 7 is tangent to the outer arc surface of the substrate glass 8 to be tested.

[0034] During the testing process, after the substrate glass 8 to be tested is clamped and fixed by the first baffle 2 and the first clamping unit, the second clamping unit 7 moves from the vertical direction to clamp against the outer arc surface. On the one hand, this can reduce the error between the substrate glass and the zero point position of the scale 6, making the curvature data more accurate and reliable. On the other hand, if the curvature of the substrate glass 8 to be tested is small, the second clamping unit 7 can provide support.

[0035] See Figure 2 In a specific embodiment of this utility model, the second clamping unit 7 is an L-shaped structure, the vertical part of the L-shaped structure serves as the clamping part 10 of the second clamping unit 7; the horizontal part of the L-shaped structure is parallel to the upper end surface of the base 1; the second clamping unit 7 is made of transparent polymer material.

[0036] Transparent polymer materials refer to non-metallic materials with light-transmitting properties, specifically acrylic glass (PMMA). Its light-transmitting properties facilitate observation of the contact state between the top clamping part 10 and the outer curved surface of the glass. At the same time, operators can directly confirm the data of the scale 6 by visual inspection, avoiding measurement errors caused by blind spots.

[0037] In a specific embodiment of this utility model, a fixed baffle 9 is also included. The first tightening unit includes an adjusting bolt 5 and a movable baffle 4. The fixed baffle 9 is disposed on the base 1 and is parallel to the first baffle 2. The fixed baffle 9 is provided with a through hole, and the movable baffle 4 is provided with a blind hole. When testing the curvature of the substrate glass, the adjusting bolt 5 passes through the through hole and locks into the blind hole on the movable baffle 4.

[0038] The fixed baffle 9 is a rigid structure fixed to the base 1 and parallel to the first baffle 2. It can be made of metal or alloy and is used to cooperate with the movable baffle 4 to form a clamping space. The adjusting bolt 5 is a threaded rod-shaped component, which can be made of stainless steel. It passes through the through hole of the fixed baffle 9 and is threaded to the blind hole of the movable baffle 4. Rotating the adjusting bolt 5 controls the movement distance of the movable baffle 4. The movable baffle 4 is a plate-shaped component that can move along the base 1. It can be made of the same material as the fixed baffle 9 and is used to move closer to or further away from the fixed baffle 9 under the drive of the adjusting bolt 5, thereby clamping the glass substrate 8 to be tested.

[0039] During the testing process, the substrate glass 8 to be tested is placed between the first baffle 2 and the movable baffle 4. By rotating the adjusting bolt 5, the movable baffle 4 is moved along the base 1, clamping the substrate glass between the movable baffle 4 and the first baffle 2. When the adjusting bolt 5 passes through the through hole of the fixed baffle 9 and locks with the blind hole of the movable baffle 4, the position of the movable baffle 4 is fixed, thus ensuring the stability of the substrate glass during the testing process. The displacement of the movable baffle 4 can be precisely controlled by adjusting the rotation of the adjusting bolt 5 to accommodate substrate glass 8 with different curvatures.

[0040] This solution directly fixes the substrate glass with a mechanical clamping structure, eliminating the influence of external interference on the testing process. At the same time, the adjusting bolt 5 is used to fine-tune the movable baffle 4, ensuring the stability of the substrate glass during testing, thereby improving the accuracy of curvature measurement. Through the above technical solution, this application can effectively avoid displacement or shaking of the substrate glass during the testing process, ensure the stability of the measurement benchmark of the scale 6, and at the same time, through the precise control of the adjusting bolt 5, make the clamping force between the movable baffle 4 and the fixed baffle 9 evenly distributed, prevent glass deformation caused by uneven clamping force, and ultimately improve the reliability and repeatability of the curvature test results.

[0041] Preferably, the fixed baffle 9 is made of a rigid metal or alloy material.

[0042] Preferably, the L-shaped baffle and the movable first clamping unit are made of a rigid metal or alloy material.

[0043] Through optimized material selection, the fixed baffle 9, the L-shaped baffle, and the movable first clamping unit can maintain geometric stability under high temperature, high humidity, or mechanical load environments, making them particularly suitable for continuous inspection scenarios in glass production lines.

[0044] Preferably, the base 1 is made of inorganic non-metallic material, which includes, but is not limited to, marble.

[0045] The base 1 serves as the foundation structure supporting the scale 6, the L-shaped baffle, and the clamping unit. Its deformation directly affects the accuracy of the scale 6's measurement reference. By using inorganic non-metallic materials, the base 1 can maintain geometric stability during the testing process, avoiding zero-point shift of the scale 6 due to thermal expansion and contraction or deformation under stress.

[0046] For example, when testing near an annealing furnace, fluctuations in ambient temperature may cause micron-level deformation of the metal base 1. Using marble can suppress such deformation and keep the zero point position where the scale 6 intersects with the second baffle 3 fixed.

[0047] Preferably, the length of the substrate glass 8 to be tested is in the range of 500~1000mm, and the width of the substrate glass 8 to be tested is in the range of 100~200mm.

[0048] In actual production, both the flow-direction bending and non-flow-direction bending of the substrate glass have a significant impact on the molding process and quality. Therefore, more accurate requirements are put forward for bending degree detection. Due to the limitations of the temperature difference detection method, this device can be used for detection.

[0049] Before testing, the testing position of the substrate glass (flow direction or non-flow direction) must first be determined. The substrate glass 8 to be tested is cut and prepared according to its requirements. The prepared substrate glass 8 is then placed upright on the base 1 as required. By adjusting the adjusting bolts 5, the first baffle 2, the second baffle 3, and the movable baffle 4 are all in contact with the substrate glass 8 (no force is applied between the baffles and the substrate glass 8). Finally, the position of the second clamping unit 7 is adjusted so that its leading edge is tangent to the outer arc surface of the substrate glass 8. The value of the leading edge of the second clamping unit 7 on the scale 6 is the curvature.

[0050] See Figure 3 The bending test of the substrate glass consists of four steps, specifically: Step 1: Prepare the glass substrate to be tested 8: Cut the glass plate into strips (500~1000mm long and 100~200mm wide) along the glass flow direction or non-flow direction, and set aside.

[0051] Step 2: Place the glass substrate 8 to be tested: Place the prepared glass substrate 8 upright on the base 1, ensuring that one end of the glass substrate 8 is located at the angle between the first baffle 2 and the second baffle 3, and the other end is located at the angle between the movable baffle 4 and the second baffle 3. If the glass has a small curvature and cannot stand upright, use the second clamping unit 7 for support.

[0052] Step 3: Adjust the position of the second clamping unit 7: Adjust the position of the second clamping unit 7 so that the leading edge of the second clamping unit 7 is just tangent to the outer arc surface of the substrate glass 8 to be tested.

[0053] Step 4, Reading: The dimension of scale 6 corresponding to the tangent position is the curvature. Read the value of the front edge of the second clamping unit 7 on scale 6.

[0054] Finally, it should be noted that the embodiments listed above are merely one or more specific manifestations of the technical solution of this utility model. Their purpose is to clearly illustrate the concept, principle, and application of this utility model through specific examples, and is by no means intended to limit the scope of protection of this utility model to these specific embodiments. In fact, the true value of this utility model lies in its proposed technical ideas and innovations, rather than its manifestations or implementation methods.

[0055] For those skilled in the art, after thoroughly reading and understanding the technical solution of this utility model, they are fully capable of making various changes, modifications, or equivalent substitutions to the specific embodiments of the utility model based on their own professional knowledge and skills. These changes may include, but are not limited to: adjusting the range of technical parameters, optimizing the algorithm flow to improve efficiency, and replacing some technical components to achieve better compatibility or reduce costs. As long as these modified technical solutions substantially retain the technical features claimed by the original utility model, that is, they can still achieve the core functions and effects of this utility model, then these changes should be considered to fall within the scope of protection of the pending claims of this utility model.

[0056] Furthermore, with the continuous progress and development of technology, new technical means and methods are constantly emerging, which provides ample space for the further improvement and perfection of this utility model. Therefore, the scope of protection of this utility model should also include reasonable and foresightful improvements and extensions based on existing technology. As long as these improvements and extensions do not deviate from the basic principles and core concept of this utility model, they should be regarded as equivalents of this utility model and are equally protected by patent rights.

Claims

1. A device for detecting the curvature of a substrate glass, characterized in that, The device includes a base (1), a scale (6), an L-shaped baffle, and a movable first clamping unit. The L-shaped baffle is mounted on the base (1) and includes a first baffle (2) and a second baffle (3) connected vertically. The first clamping unit is mounted on the end of the base (1) away from the first baffle (2) and is used to move along a direction parallel to the glass substrate (8) to be tested. The scale (6) is mounted on the upper surface of the base (1), and the intersection of the scale (6) and the second baffle (3) is the zero point position. When testing the curvature of the substrate glass, the first baffle (2) is perpendicular to the substrate glass (8) to be tested, the second baffle (3) is parallel to the substrate glass (8) to be tested, one end of the substrate glass (8) to be tested is in close contact with the first baffle (2), and the other end is in close contact with the first clamping unit.

2. The substrate glass curvature detection device according to claim 1, characterized in that, It also includes a movable second clamping unit (7), which is used to move along a direction perpendicular to the glass substrate (8) to be tested; When testing the curvature of the substrate glass, the clamping part (10) of the second clamping unit (7) is tangent to the outer arc surface of the substrate glass (8) to be tested.

3. The substrate glass curvature detection device according to claim 2, characterized in that, The second clamping unit (7) is an L-shaped structure. The vertical part of the L-shaped structure serves as the clamping part (10) of the second clamping unit (7). The horizontal part of the L-shaped structure is parallel to the upper surface of the base (1). The second clamping unit (7) is made of transparent polymer material.

4. The substrate glass curvature detection device according to claim 3, characterized in that, The transparent polymer material includes, but is not limited to, plexiglass.

5. The substrate glass curvature detection device according to claim 1, characterized in that, It also includes a fixed baffle (9), the first clamping unit includes an adjusting bolt (5) and a movable baffle (4), the fixed baffle (9) is set on the base (1) and is parallel to the first baffle (2), the fixed baffle (9) has a through hole and the movable baffle (4) has a blind hole; When testing the curvature of the substrate glass, the adjusting bolt (5) passes through the through hole and locks into the blind hole on the movable baffle (4).

6. The substrate glass curvature detection device according to claim 1, characterized in that, The fixed baffle (9) is made of a rigid metal or alloy material.

7. The substrate glass curvature detection device according to claim 1, characterized in that, The base (1) is made of inorganic non-metallic material.

8. The substrate glass curvature detection device according to claim 7, characterized in that, The inorganic non-metallic material is marble.

9. A substrate glass curvature detection device according to claim 1, characterized in that, The length of the substrate glass (8) to be tested ranges from 500 to 1000 mm, and the width of the substrate glass (8) to be tested ranges from 100 to 200 mm.

10. The substrate glass curvature detection device according to claim 1, characterized in that, The L-shaped baffle and the movable first clamping unit are made of rigid metal or alloy materials.

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