CN111087166A - Analyzing device, float glass manufacturing device, analyzing method, and float glass manufacturing method - Google Patents
Analyzing device, float glass manufacturing device, analyzing method, and float glass manufacturing method Download PDFInfo
- Publication number
- CN111087166A CN111087166A CN201911011440.6A CN201911011440A CN111087166A CN 111087166 A CN111087166 A CN 111087166A CN 201911011440 A CN201911011440 A CN 201911011440A CN 111087166 A CN111087166 A CN 111087166A
- Authority
- CN
- China
- Prior art keywords
- glass ribbon
- tip portion
- glass
- molten metal
- interval
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
- C03B18/04—Changing or regulating the dimensions of the molten glass ribbon
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B15/00—Drawing glass upwardly from the melt
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
- C03B18/18—Controlling or regulating the temperature of the float bath; Composition or purification of the float bath
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Quality & Reliability (AREA)
- Multimedia (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Provided are an analysis device, a float glass production device, an analysis method, and a float glass production method, wherein variation in the thickness of a glass substrate can be reduced by suppressing variation in the width direction of a glass ribbon in a molten metal bath. A float glass production apparatus (1) is provided with a melting furnace (10), a molten metal bath (20), a slow cooling furnace (30), and an analysis device (40). A plurality of pairs of upper rolls (50) are arranged in the molten metal bath (20). The upper roller (50) has a plurality of protrusions (52) on the outer periphery of a tip portion (51) that contacts the glass ribbon (22), and forms recesses (T) in the glass ribbon (22) at intervals in the flow direction. An imaging unit (41) of an analysis device (40) images the recesses (T), and an image processing recognition unit (42) calculates the positions and intervals of the recesses (T) to determine an upper roller (50) that causes variation in sheet thickness.
Description
Technical Field
The invention relates to an analysis device, a float glass manufacturing device, an analysis method and a float glass manufacturing method.
Background
The thickness variation in the entire surface of a glass substrate for a Flat Panel Display (FPD) affects the focus shift of an exposure machine in a photolithography process. Glass substrates for FPDs, particularly for Liquid Crystal Displays (LCDs), are required to have a strict requirement for thickness variation, for example, 20 μm or less within 1500 mm. The thickness deviation is a difference between the maximum value of the thickness and the minimum value of the thickness.
As a method for reducing the thickness deviation, patent document 1 proposes a technique in which a heater region of a molten metal bath is divided in a flow direction and a width direction of a glass ribbon, a plurality of heaters are provided in each zone, and the plurality of heaters are controlled for each zone.
Prior art documents
Patent document
Patent document 1: japanese patent laid-open publication No. 2011-225386
Disclosure of Invention
Problems to be solved by the invention
However, even with the technique of patent document 1, if the glass ribbon in the molten metal bath fluctuates in the width direction, the thickness of the glass ribbon also fluctuates, and there is a problem that the variation in the thickness of the glass substrate increases. Further, the variation in the width direction of the glass ribbon sometimes causes a problem that the requirement for the thickness deviation cannot be satisfied.
The present invention has been made in view of the above problems, and a main object thereof is to provide an analysis device, a float glass production device, an analysis method, and a float glass production method, which can reduce variation in thickness of a glass substrate by suppressing variation in the width direction of a glass ribbon in a molten metal bath.
Means for solving the problems
An analyzing device according to the present invention is applied to a float glass manufacturing apparatus including a liquid metal bath for forming a glass ribbon by flowing molten glass continuously supplied onto molten metal onto the molten metal and a slow cooling furnace for gradually cooling the glass ribbon while conveying the glass ribbon by annealing rollers, and analyzes a plurality of concave portions formed on both sides in a width direction of the glass ribbon, wherein the liquid metal bath includes a plurality of pairs of upper rollers provided at intervals in a flow direction of the glass ribbon, the upper rollers have a plurality of protrusions on an outer periphery of a tip portion contacting the glass ribbon, support both sides in the width direction of the glass ribbon, and form the concave portions at intervals in the flow direction, and the analyzing device includes: an imaging unit that images both sides of the glass ribbon in the width direction; and an image processing and recognizing unit that detects a position of the concave portion after image processing is performed on the inspection image captured by the imaging unit, and recognizes the upper roller on which the concave portion having a predetermined interval is formed based on the interval between the concave portions in the flow direction.
The float glass manufacturing apparatus of the present invention is a float glass manufacturing apparatus including the analysis device, wherein one or more of a drawing amount per day of the glass ribbon, a conveying speed of the glass ribbon on the annealing roll, a rotation speed of the tip portion, an angle formed by the tip portion and a conveying direction of the glass ribbon in a plan view, a position of the tip portion in a plan view, and a position of the tip portion in a vertical direction are controlled based on a temporal change in the detected position of the concave portion.
An analysis method according to the present invention is applied to a float glass manufacturing apparatus including a liquid metal bath for forming a glass ribbon by flowing molten glass continuously supplied onto molten metal onto the molten metal and a slow cooling furnace for gradually cooling the glass ribbon while conveying the glass ribbon through annealing rollers, the analysis method being an analysis method for analyzing a plurality of concave portions formed on both side portions in a width direction of the glass ribbon, wherein the liquid metal bath includes a plurality of pairs of upper rollers provided at intervals in a flow direction of the glass ribbon, the upper rollers have a plurality of protruding portions on an outer periphery of a tip portion contacting the glass ribbon, support both side portions in the width direction of the glass ribbon, and form the concave portions at intervals in the flow direction, the analysis method including: a step of imaging both side portions of the glass ribbon in the width direction; and a step of detecting a position of the concave portion after image processing is performed on the captured inspection image, and recognizing the upper roller on which the concave portion having a predetermined interval is formed, based on the interval between the concave portions in the flow direction.
The float glass production method of the present invention is a float glass production method using the analysis method, wherein one or more of a drawing amount per day of the glass ribbon, a conveyance speed of the glass ribbon on the annealing roll, a rotation speed of the tip portion, an angle formed by the tip portion and a conveyance direction of the glass ribbon in a plan view, a position of the tip portion in a plan view, and a position of the tip portion in a vertical direction are controlled based on a temporal change in the detected position of the recessed portion.
Effects of the invention
According to the present invention, the upper roller which causes the deviation in the sheet thickness can be specified by analyzing the concave portion in the glass ribbon, and therefore, a glass substrate having a highly accurate sheet thickness can be provided.
Drawings
FIG. 1 is a conceptual diagram illustrating an example of a float glass manufacturing apparatus according to the present invention.
Fig. 2 shows the relationship between the upper roller and the glass ribbon in the present invention, wherein (a) is a conceptual view from the side, (b) is a conceptual view from the top, and (c) is a conceptual view from the front.
Fig. 3 is a conceptual view showing an upper roller and a concave portion according to the present invention.
Fig. 4 is a conceptual view showing another embodiment of the upper roll of the present invention.
Fig. 5 is a conceptual diagram showing an example of another embodiment of the imaging unit according to the present invention, where (a) is a conceptual diagram of the imaging unit transmitted through the optical system, and (b) is a schematic diagram of an image obtained by the imaging unit transmitted through the optical system.
Description of the reference symbols
1 float glass manufacturing device
10 melting furnace
20 molten metal bath
21 molten metal
22 glass ribbon
23 both side parts
24 two ends
30 slow cooling furnace
31 annealing roller
40 analysis device
41 shooting part
42 image processing and recognizing unit
43 display part
50 upper roll
51 tip end part
52 projection part
53 rotating shaft
Interval of D protruding parts
L glass ribbon conveyance speed
T concave part
Rotation speed of V-tip portion
Angle formed by theta tip and conveying direction
Detailed Description
Hereinafter, specific embodiments of the analysis device, the float glass production device, the analysis method, and the float glass production method according to the present invention will be described in detail with reference to the drawings.
Fig. 1 is a conceptual diagram illustrating an example of a float glass manufacturing apparatus according to the present embodiment. Fig. 2 shows the relationship between the upper roller and the glass ribbon, wherein (a) is a conceptual view from the side and (b) is a conceptual view from the top. Fig. 3 is a conceptual diagram showing the upper roller and the concave portion. A float glass manufacturing apparatus according to the present embodiment will be described with reference to fig. 1 to 3.
The float glass manufacturing apparatus 1 of the present embodiment includes a melting furnace 10, a molten metal bath 20, a slow cooling furnace 30, and an analyzing device 40. In the molten metal bath 20, a plurality of pairs of upper rolls 50 are disposed on the molten metal 21 made of tin or the like, and a plurality of annealing rolls 31 are disposed in the annealing furnace 30.
Molten glass is supplied from the melting furnace 10 onto the molten metal 21 in the molten metal bath 20, and the molten glass is formed into a glass ribbon 22 while flowing over the molten metal 21. In addition, each time molten glass is supplied from the melting furnace 10 to the molten metal bath 20, the opening amount is controlled by the twill 11 that moves up and down, and the supply amount is controlled. In the present embodiment, the pair of monitoring cameras 71 images the area near the edge of the molten glass (glass ribbon 22) in the molten metal bath 20 through the sight glass provided in the molten metal bath 20, and monitors the supply amount.
Tension in the width direction of the glass ribbon 22 is applied to the glass ribbon 22 in the molten metal bath 20 by a plurality of pairs of upper rollers 50 provided at intervals in the flow direction of the glass ribbon 22 and supporting both side portions 23 in the width direction of the glass ribbon 22.
The upper rollers 50 are arranged in pairs facing each other on both widthwise side portions 23 of the glass ribbon 22, and the glass ribbon 22 is fed downstream by the rotation of the upper rollers 50, thereby preventing the width of the glass ribbon 22 from being narrowed by surface tension.
The number of the upper rollers 50 is appropriately set according to the forming conditions such as the kind of glass and the target thickness, and is, for example, 4 to 30 pairs, preferably 10 to 30 pairs. The smaller the target thickness of the glass substrate, the larger the number of upper rollers to be provided.
The glass ribbon 22 formed to have a predetermined thickness in the liquid metal bath 20 is drawn from the bath surface of the molten metal 21 by the lift roller 32 disposed between the liquid metal bath 20 and the slow cooling furnace 30, is conveyed by the annealing roller 31 in the slow cooling furnace 30, and is slowly cooled to a temperature close to room temperature. The glass ribbon after the slow cooling is cut into a desired size by a cutting device, and a glass substrate is obtained.
As shown in fig. 2, the upper roller 50 includes a rotary shaft 53 supported by an external member not shown, and a tip portion 51 rotatably attached to a tip end of the rotary shaft 53 and in contact with the glass ribbon 22. The tip 51 is a circular rotating body, and a plurality of protrusions 52 are provided on the outer periphery of the tip 51 at predetermined intervals in the circumferential direction. Thus, when the tip end portion 51 rotates, the plurality of protrusions 52 on the outer periphery form the recessed portions T in the glass ribbon 22 at intervals in the flow direction of the glass ribbon 22. The rotation speed V of the tip end portion 51 of the upper roller 50, the angle θ formed by the tip end portion 51 and the conveyance direction (flow direction) of the glass ribbon 22 in plan view, the position of the tip end portion 51 in plan view, and the position of the tip end portion 51 in the vertical direction are controlled.
In the above-described float glass production, the variation in thickness of the glass ribbon 22 can be reduced by suppressing variation in the width direction of the glass ribbon 22, but when variation occurs in the variation in thickness, it is difficult to determine which of the plurality of pairs of upper rollers 50 causes the variation.
Therefore, in the float glass manufacturing apparatus 1 of the present embodiment, the analyzing device 40 for analyzing the concave portion T is provided at the rear stage of the annealing furnace 30. The analysis device 40 includes: an imaging unit 41 for imaging both widthwise side portions 23 of the glass ribbon 22; an image processing recognizing unit 42 that detects the positions of the recesses T after image processing is performed on the test image captured by the imaging unit 41, and recognizes the upper roller 50 on which the recesses T having a predetermined interval are formed based on the interval between the recesses T in the flow direction; and a display unit 43 for displaying the examination image.
The analysis device 40 is electrically connected to the control unit 60, and the control unit 60 controls the driving unit 62 for driving the rotation of the lift roller 32 and the annealing roller 31 and the driving unit 61 for driving the rotation of the upper roller 50 based on the analysis result of the image processing and recognition unit 42.
The analysis device 40 may be provided in the slow cooling furnace 30 as long as it can ensure a analysis atmosphere at 100 ℃.
As described above, in the float glass manufacturing apparatus 1, the plurality of pairs of upper rollers 50 are provided along the flow direction of the glass ribbon 22, and the rotation speed V of each upper roller 50 is different. Fig. 3 shows 3 upper rollers 501, 502, 503 arranged in this order from the upstream side to the downstream side. In fig. 3, the upper rollers 501, 502, 503 are provided from the outside toward the inside in the width direction as they go from the upstream side to the downstream side, but the present invention is not limited thereto. For example, the upper roller 503 may be provided on the inner side in the width direction than the upper roller 501 and on the outer side than the upper roller 502.
The rotation speed V of the tip portion 51 of the downstream upper roller 50 is faster than that of the upstream side, and in the example of fig. 3, the rotation speed of the upper roller 501 < the rotation speed of the upper roller 502 < the rotation speed of the upper roller 503. From the relationship of the rotation speeds, it is understood that the relationship of the interval between the concave portions T1 > the interval between the concave portions T2 > the interval between the concave portions T3 holds for the concave portions T1 of the upper roller 501, the concave portions T2 of the upper roller 502, and the concave portions T3 of the upper roller 503.
In view of the above, the inventors have devised a mathematical expression in order to confirm whether or not the corresponding upper roller 50 can be identified from the interval between the concave portions T imaged by the imaging unit 41, and studied the relationship between the theoretical value and the actual measurement value based on the mathematical expression.
According to this equation, the distance D between the protrusions 52 in the circumferential direction of the tip portion 51 shown in fig. 2 (c) is multiplied by the conveyance speed L of the glass ribbon 22 on the annealing roll 31, and the product obtained by dividing the product by the rotation speed V of the tip portion 51 becomes the distance between the concave portions T (edge mark distance). That is, the edge mark interval is D × L/V.
The distance between the recesses T is calculated based on the above expression, and measured values are measured. The measured value is a viscosity of 10 in the glass ribbon in the upper roll5.3The interval between the concave portions T formed by the upper rollers provided in the region of dPa · s or more can be determined to have a correlation between the theoretical value and the measured value. By programming the correlation, the image processing and recognizing unit 42 compares the value calculated by the above expression with the interval (actual measurement value) between the concave portions T in the flow direction, and thereby can recognize the upper roller 50 having the concave portion T formed with the interval (actual measurement value) between the concave portions T closest to the calculated value as the upper roller 50 having the rotation speed V at the tip portion 51.
Since the image pickup unit 41 picks up images of both the widthwise side portions 23 of the glass ribbon 22, the image processing and recognizing unit 42 can detect the positions of both the widthwise end portions 24 of the glass ribbon 22 and can grasp the fluctuation of the glass ribbon 22.
As shown in fig. 3, the imaging unit 41 may be an optical device including a light projector 41a and a light receiver 41b, and the analysis region (the broken line region in fig. 3) is imaged by receiving the regular reflection light irradiated from the light projector 41a to the analysis region on the surface of the glass ribbon 22 by the light receiver 41 b.
As the light projector 41a, an LED light source can be preferably used, and as the light receiver 41b, a CCD area sensor can be preferably used. The light source may be a fiber light source using a light source other than an LED, but considering the use environment (atmosphere at 100 ℃ or lower, etc.), an LED light source is preferable. In order to perform real-time control, the imaging interval by the light receiver 41b is preferably set to 1 minute or less.
The image capturing units 41 are provided near the both side portions 23 of the glass ribbon 22, and capture images of the both end portions 24 and images of the plurality of recesses T as test images having coordinates. The position and the interval of each concave portion T can be calculated from the image coordinates.
Since there are a plurality of factors of variation in thickness, in the specific upper roller 50, by controlling 1 or more of the rotation speed V of the distal end portion 51 of the upper roller 50, the angle θ formed between the distal end portion 51 and the conveying direction in plan view, the position of the distal end portion 51 in plan view, and the position of the distal end portion 51 in the vertical direction, variation in thickness can be eliminated as much as possible. Further, controlling the conveying speed L of the glass ribbon 22 on the annealing roller 31 or the amount of drawing of the glass ribbon 22 per day can also contribute to suppression of variation in sheet thickness. The float glass manufacturing apparatus 1 can control 1 or more of the amount of extraction per day of the glass ribbon 22, the conveying speed L of the glass ribbon 22 on the annealing roller 31, the rotation speed V of the tip portion 51, the angle θ formed by the tip portion 51 and the conveying direction of the glass ribbon 22 in plan view, the position of the tip portion 51 in plan view, and the position of the tip portion 51 in the vertical direction, based on the temporal change in the detected position of the recessed portion T. Furthermore, the float glass manufacturing apparatus 1 can control 1 or more of the amount of extraction per day of the glass ribbon 22, the conveying speed L of the glass ribbon 22 on the annealing roller 31, the rotation speed V of the tip portion 51, the angle θ formed by the tip portion 51 and the conveying direction of the glass ribbon 22 in a plan view, the position of the tip portion 51 in a plan view, and the position of the tip portion 51 in a vertical direction, based on the temporal change in the positions of both end portions 24 in the width direction of the glass ribbon 22.
The rotation speed V of the distal end portion 51 of the upper roller 50, the angle θ formed by the distal end portion 51 and the conveyance direction in plan view, the position of the distal end portion 51 in plan view, and the position of the distal end portion 51 in the vertical direction can be controlled by varying the rotation speed of the distal end portion 51, the rotation shaft 53, and the pressing force in accordance with the command of the control unit 60 and in conjunction with the drive unit 61. The conveying speed L of the glass ribbon 22 and the amount of drawing per day can be controlled by varying the rotation speed of the annealing roller 31 in conjunction with the driving unit 62 in accordance with the instruction of the control unit 60.
The interval D (fig. 2 c) between the protrusions 52 of the upper rollers 50 is set to the same value, but as shown in fig. 4, the interval D between the protrusions 52 of at least one pair of upper rollers 504 may be different from the intervals D between the other pairs of upper rollers 501, 502, 503.
Fig. 5 shows another embodiment of the imaging unit 41 of the analysis device 40, where (a) is a conceptual diagram of the imaging unit 41 through the optical system, and (b) is a schematic diagram of an image obtained by the imaging unit 41 through the optical system.
As shown in fig. 5 (a), in the imaging unit 41, the transmitted light that has passed through the glass ribbon 22 from the light projector 45 provided below the glass ribbon 22 is detected by the light receiver 46 provided above the glass ribbon 22, and a test image is obtained. Thus, in the imaging unit 41 through the optical system, the dot-shaped concave portions T formed by the projection portions 52 of the upper roller 50 being depressed toward the surface of the glass ribbon 22 are imaged. In this case, the clarity of the concave portion T can be achieved by disposing the screen 47 between the glass ribbon 22 and the light projector 45. Therefore, the left end to the right end of the recess T in fig. 5 (b) is an analyzed recess T, and a test image of the recess T can be obtained as in the case of the imaging unit 41 of the reflection optical system shown in fig. 3.
The following apparatus may be installed in the float glass manufacturing apparatus 1 of the present embodiment.
A pair of monitoring devices including a monitoring camera having a cooling function, a mirror, and the like may be disposed between the adjacent upper rollers 50 or on the downstream side of the most downstream upper roller 50 to monitor both side portions 23 of the glass ribbon 22 in the liquid metal bath 20. In the embodiment of fig. 1, the monitoring device 73 is provided between 2 upper rollers 50 adjacent in the conveying direction of the glass ribbon 22, and the monitoring device 72 is provided on the downstream side of the most downstream upper roller 50, and both side portions 23 at the respective positions are monitored.
The radiation thermometer may be disposed over the entire width of the molten metal bath 20 to monitor the temperature of the glass ribbon 22 over the entire width.
The temperature can be monitored by the radiation thermometer, and the temperature of the glass ribbon 22 can be controlled for each zone by using heaters disposed in the zones partitioned in the molten metal bath 20. This can control the thickness of the glass ribbon 22 to be uniform.
The present invention is not limited to the above-described embodiments, and modifications, improvements, and the like may be appropriately made. The material, shape, size, numerical value, form, number, arrangement position, and the like of each component in the above-described embodiments are arbitrary as long as the present invention can be realized, and are not limited.
Industrial applicability
The float glass produced may be used for various applications such as architectural use, vehicle use, flat panel display use, cover glass use, and others.
Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
The present application is based on japanese patent application 2018-200271 filed 24.10.2018, the contents of which are incorporated herein by reference.
Claims (9)
1. An analysis device suitable for a float glass manufacturing apparatus including a float bath for forming a glass ribbon from molten glass continuously supplied onto molten metal while flowing over the molten metal, and a slow cooling furnace for slow cooling the glass ribbon while being conveyed by annealing rolls, the analysis device analyzing a plurality of concave portions formed on both sides in a width direction of the glass ribbon,
the molten metal bath is provided with a plurality of pairs of upper rollers which are arranged at intervals along the flowing direction of the glass ribbon,
the upper roller has a plurality of protrusions on the outer periphery of a tip end portion that contacts the glass ribbon, supports both side portions in the width direction of the glass ribbon, and forms the recesses at intervals in the flow direction,
the analysis device is provided with:
an imaging unit that images both sides of the glass ribbon in the width direction; and
an image processing and recognizing unit that detects a position of the concave portion after image processing is performed on the inspection image captured by the imaging unit, and recognizes the upper roller on which the concave portion having a predetermined interval is formed based on the interval between the concave portions in the flow direction.
2. The parsing device of claim 1, wherein,
the image processing identification unit compares a value calculated by multiplying the interval of the protruding portions in the circumferential direction of the tip portion by the conveying speed of the glass ribbon on the annealing roller and dividing the result by the rotation speed of the tip portion with the interval between the recessed portions in the flow direction, and identifies the upper roller having the recessed portions formed with the interval closest to the value as the upper roller having the tip portion with the rotation speed.
3. The parsing apparatus of claim 1 or 2, wherein,
the image processing and recognizing unit detects positions of both ends of the glass ribbon in the width direction.
4. A float glass production apparatus comprising the analysis apparatus according to any one of claims 1 to 3, wherein,
controlling one or more of a draw-out amount per day of the glass ribbon, a conveying speed of the glass ribbon on the annealing roll, a rotation speed of the tip portion, an angle formed by the tip portion and a conveying direction of the glass ribbon in a plan view, a position of the tip portion in a plan view, and a position of the tip portion in a vertical direction, based on the detected change over time in the position of the recessed portion.
5. The float glass manufacturing apparatus of claim 4, wherein,
the rotation speed of the tip portion of the plurality of pairs of upper rollers increases as the rollers move downstream in the flow direction.
6. The float glass manufacturing apparatus according to claim 4 or 5, wherein,
the interval of the protruding portions in the circumferential direction of the tip portion of at least one pair of the upper rollers is different from the interval of the other pairs of the upper rollers.
7. The float glass manufacturing apparatus according to claim 4 or 5, wherein,
one or more of the amount of extraction per day of the glass ribbon, the conveying speed of the glass ribbon on the annealing roll, the rotation speed of the tip portion, the angle formed by the tip portion and the conveying direction in a plan view, the position of the tip portion in a plan view, and the position of the tip portion in a vertical direction are controlled based on the temporal change in the positions of both ends of the glass ribbon in the width direction.
8. An analysis method applied to a float glass manufacturing apparatus including a float bath for forming a glass ribbon from molten glass continuously supplied onto molten metal while flowing over the molten metal, and a slow cooling furnace for slow cooling the glass ribbon while conveying the glass ribbon through annealing rolls, the analysis method being an analysis method for analyzing a plurality of concave portions formed on both sides in a width direction of the glass ribbon,
the molten metal bath is provided with a plurality of pairs of upper rollers which are arranged at intervals along the flowing direction of the glass ribbon,
the upper roller has a plurality of protrusions on the outer periphery of a tip end portion that contacts the glass ribbon, supports both side portions in the width direction of the glass ribbon, and forms the recesses at intervals in the flow direction,
the analysis method comprises the following steps:
a step of imaging both side portions of the glass ribbon in the width direction; and
and a step of detecting a position of the concave portion after image processing is performed on the captured inspection image, and recognizing the upper roller on which the concave portion having a predetermined interval is formed, based on the interval between the concave portions in the flow direction.
9. A method for manufacturing float glass by using the analysis method according to claim 8, wherein,
controlling one or more of a draw-out amount per day of the glass ribbon, a conveying speed of the glass ribbon on the annealing roll, a rotation speed of the tip portion, an angle formed by the tip portion and a conveying direction of the glass ribbon in a plan view, a position of the tip portion in a plan view, and a position of the tip portion in a vertical direction, based on the detected change over time in the position of the recessed portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018200271A JP2020066548A (en) | 2018-10-24 | 2018-10-24 | Analysis device, manufacturing apparatus of float glass, analysis method, and manufacturing method of float glass |
| JP2018-200271 | 2018-10-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111087166A true CN111087166A (en) | 2020-05-01 |
| CN111087166B CN111087166B (en) | 2022-09-23 |
Family
ID=70389525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911011440.6A Active CN111087166B (en) | 2018-10-24 | 2019-10-23 | Analyzing device, float glass manufacturing device, analyzing method, and float glass manufacturing method |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2020066548A (en) |
| KR (1) | KR20200047358A (en) |
| CN (1) | CN111087166B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022064988A1 (en) * | 2020-09-25 | 2022-03-31 | 日本電気硝子株式会社 | Method and device for producing glass plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010126386A (en) * | 2008-11-26 | 2010-06-10 | Asahi Glass Co Ltd | Method and apparatus for producing glass plate |
| CN103261104A (en) * | 2010-12-15 | 2013-08-21 | 旭硝子株式会社 | Glass plate, method for inspecting glass plate, and method for manufacturing glass plate |
| CN104220387A (en) * | 2012-04-12 | 2014-12-17 | 旭硝子株式会社 | Method and device for manufacturing glass plate |
| CN104245605A (en) * | 2012-04-17 | 2014-12-24 | 旭硝子株式会社 | Glass plate manufacturing device and manufacturing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5565062B2 (en) | 2010-04-15 | 2014-08-06 | 旭硝子株式会社 | Float glass manufacturing apparatus and float glass manufacturing method |
-
2018
- 2018-10-24 JP JP2018200271A patent/JP2020066548A/en active Pending
-
2019
- 2019-10-21 KR KR1020190130617A patent/KR20200047358A/en unknown
- 2019-10-23 CN CN201911011440.6A patent/CN111087166B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010126386A (en) * | 2008-11-26 | 2010-06-10 | Asahi Glass Co Ltd | Method and apparatus for producing glass plate |
| CN103261104A (en) * | 2010-12-15 | 2013-08-21 | 旭硝子株式会社 | Glass plate, method for inspecting glass plate, and method for manufacturing glass plate |
| CN104220387A (en) * | 2012-04-12 | 2014-12-17 | 旭硝子株式会社 | Method and device for manufacturing glass plate |
| CN104245605A (en) * | 2012-04-17 | 2014-12-24 | 旭硝子株式会社 | Glass plate manufacturing device and manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111087166B (en) | 2022-09-23 |
| JP2020066548A (en) | 2020-04-30 |
| KR20200047358A (en) | 2020-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5582515B2 (en) | Glass plate manufacturing method and glass plate strain measuring apparatus | |
| WO2016091152A1 (en) | Method and device for sealant coating inspection | |
| EP3542916B1 (en) | Welded tube manufacturing device and welded tube manufacturing method | |
| CN111087166B (en) | Analyzing device, float glass manufacturing device, analyzing method, and float glass manufacturing method | |
| FI128985B (en) | Method and device for controlling heat treatment process of glass sheets | |
| KR100652948B1 (en) | Method and system for measuring glass thickness of liquid crystal display | |
| WO2018168700A9 (en) | Method and device for measuring meandering amount of belt-like body, and method and device for detecting meandering abnormality of belt-like body | |
| EP3561442B1 (en) | Strip edge detection device and strip edge detection method | |
| WO2017104177A1 (en) | Device for manufacturing plate glass, method for manufacturing plate glass, and device for conveying plate glass | |
| JP5186460B2 (en) | Accumulator vibration measuring device | |
| JP2010126386A (en) | Method and apparatus for producing glass plate | |
| KR101249758B1 (en) | System and method of measuring irregullarity of a glass plate | |
| JP2012163370A (en) | In-line substrate inspection method and device | |
| KR102530405B1 (en) | Apparatus and method for manufacturing float glass | |
| KR20150146035A (en) | Apparatus for transferring a substrate and method of driving the same | |
| JP6436854B2 (en) | Soldering apparatus and soldering method | |
| CN111295461A (en) | Plate warp correcting device for metal plate and continuous plating processing equipment for metal plate | |
| CN112005104A (en) | Image acquisition method, measurement method, and image acquisition apparatus | |
| KR20120101622A (en) | System and method of measuring irregullarity of a glass plate | |
| KR102164115B1 (en) | Apparatus for measuring surface and annealing furnace having the same and method for measuring surface | |
| WO2022172591A1 (en) | Glass plate manufacturing method and manufacturing device | |
| JP2021127489A (en) | Warp measuring method of metal strip, and manufacturing method of metal strip | |
| CN209992419U (en) | Alignment film coating detection device | |
| JP2013010985A (en) | Method for detecting tension of metal band in horizontal continuous heat treatment furnace | |
| JP2016108193A (en) | Support device of glass, manufacturing apparatus of glass plate, and manufacturing method of glass plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |