CN116002963B - Glass manufacturing method and system - Google Patents
Glass manufacturing method and system Download PDFInfo
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- CN116002963B CN116002963B CN202211546802.3A CN202211546802A CN116002963B CN 116002963 B CN116002963 B CN 116002963B CN 202211546802 A CN202211546802 A CN 202211546802A CN 116002963 B CN116002963 B CN 116002963B
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- 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
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- 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
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Abstract
The method comprises the steps of determining heating energy parameters of a high surface roughness area and a high surface roughness area in a preliminary formed glass plate, controlling a heating device to output an energy beam to the high surface roughness area according to the heating energy parameters of the high surface roughness area, enabling concave-convex parts in the high surface roughness area to absorb heat, and reducing the surface average roughness of the high surface roughness area to obtain the glass plate with the surface average roughness smaller than the preset average roughness, and further simplifying the manufacturing process of the glass plate.
Description
Technical Field
The present application relates to the field of glass manufacturing, and in particular, to a glass manufacturing method and system.
Background
Glass sheets having low liquidus viscosity characteristics and thicknesses less than 1200 microns currently have a great market demand in the consumer electronics field. In order to increase the light diffusivity of the glass sheet on the electronic device and to reduce the flash point, it is required that the surface average roughness of the glass sheet is less than a certain surface average roughness.
However, in the glass sheet forming process, the glass melt is pressed by contact with the press rolls to form a glass sheet, and the surface of the pressed glass sheet has a certain roughness due to the existence of a certain roughness on the surface of the press rolls. Therefore, it is also necessary to perform a series of grinding, polishing, and other steps on the glass plate to reduce the roughness of the glass surface, which results in complicated manufacturing steps of the conventional glass plate.
Disclosure of Invention
The main purpose of the present application is to provide a glass manufacturing method, a device, equipment and a storage medium, which aim to solve the technical problem of complicated glass plate manufacturing procedures.
To achieve the above object, the present application provides a glass manufacturing method comprising:
determining a high surface roughness region from the preformed glass sheet;
acquiring surface data of the high surface roughness region;
obtaining heating energy parameters of the high surface roughness area according to the surface data;
and heating the surface of the high surface roughness area according to the heating energy parameter to obtain the glass plate with the reduced surface average roughness of the high surface roughness area after heating.
Optionally, the acquiring the surface data of the high surface roughness region includes:
at least one of surface average roughness, high surface roughness area, surface average temperature, ratio of energy coefficient to surface viscosity logarithm is obtained.
Optionally, the acquiring the surface data of the high surface roughness region includes:
and setting preset surface roughness and fixed parameters, and comparing the ratio of the surface average roughness to the preset surface roughness with the fixed parameters to obtain the ratio of the energy coefficient to the surface viscosity logarithm.
Optionally, comparing the ratio of the surface average roughness to the preset surface roughness with the fixed parameter to obtain the ratio of the energy coefficient to the logarithm of the surface viscosity, including:
if the ratio of the average surface roughness to the preset surface roughness is not less than the fixed parameter, the ratio of the obtained energy coefficient to the surface viscosity logarithm is in the range of 4 multiplied by 10 5 To 7.89×10 9 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
if the ratio of the average surface roughness to the preset surface roughness is smaller than the fixed parameter, the ratio of the obtained energy coefficient to the surface viscosity logarithm is 3 multiplied by 10 2 Up to 4X 10 5 。
Optionally, the obtaining the heating energy parameter of the high surface roughness region according to the surface data includes:
and obtaining heating energy parameters of the high surface roughness area according to the area of the high surface roughness area, the average surface temperature and the ratio of the energy coefficient to the logarithm of the surface viscosity.
Optionally, the obtaining the heating energy parameter of the high surface roughness region according to the surface data includes:
obtaining heating energy parameters of the high surface roughness area according to the area of the high surface roughness area, the surface average temperature, the ratio of the energy coefficient to the surface viscosity logarithm and an energy formula, wherein the energy formula comprises:
P＝[(lgμ+A) -1 ×B+C-T n ]×S n ×k，
wherein P is the heating energy parameter of the high surface roughness region, A, B, C is the intrinsic property of glass, lgμ is the logarithm of the surface viscosity, S n For the area of the high surface roughness area, T n K is the energy coefficient, which is the surface average temperature.
Optionally, the heating device for heating comprises at least one of a gas heating device, a laser heating device or a microwave heating device; and/or the number of the groups of groups,
the heating device for heating is at least one.
Optionally, the heating the surface of the high surface roughness area according to the heating energy parameter to obtain a glass plate with reduced surface average roughness of the heated high surface roughness area, including:
and heating a part which is not more than one third of the surface thickness of the high surface roughness area according to the heating energy parameter so as to obtain the glass plate with reduced surface average roughness of the heated high surface roughness area.
Optionally, before the heating the surface of the high surface roughness region according to the heating energy parameter, the method further includes:
acquiring energy parameters output by a heating device;
and controlling the energy parameter output by the heating device according to the heating energy parameter, wherein the energy parameter output by the heating device is not smaller than the heating energy parameter.
Optionally, controlling the energy parameter output by the heating device according to the heating energy parameter includes:
judging whether the energy parameter output by the single heating device is larger than or equal to the heating energy parameter;
if the energy parameter output by the single heating device is larger than or equal to the heating energy parameter, controlling the single heating device to heat the surface of the high surface roughness area according to the heating energy parameter;
and if the energy parameter of the energy beam output by the single heating device is smaller than the heating energy parameter, controlling at least two heating devices to heat the surface of the high surface roughness area according to the heating energy parameter.
Optionally, the preformed glass sheet is obtained from a glass melt after molding by a press roll.
Alternatively, the glass melt has a viscosity of 5 poise to 6X 10 3 Parking; and/or the number of the groups of groups,
the viscosity of the preformed glass plate is 10 4 Poise to 1.5×10 6 And (5) parking.
Optionally, the heating the surface of the high surface roughness region according to the heating energy parameter to obtain a glass plate with reduced surface average roughness of the high surface roughness region, including:
and heating the surface of the high surface roughness area according to the heating energy parameter to obtain the glass plate with the surface average roughness of the high surface roughness area smaller than or equal to the preset surface roughness.
In a second aspect, the present application provides a glass manufacturing system comprising:
a forming unit for forming a glass melt to form a primary formed glass sheet;
the data acquisition device is used for acquiring surface data of a high surface roughness area in the primary formed glass plate;
the heating device is used for outputting an energy beam to the high surface roughness area according to the heating energy parameter and heating the surface of the high surface roughness area; wherein the heating device is arranged downstream of the forming unit;
a control device comprising a processor, a memory and a glass manufacturing program stored in the memory, which when executed by the processor, performs the steps of any one of the methods described above.
Optionally, the forming unit includes at least one pair of press rollers, and an included angle formed by a speed direction of the glass melt leaving the contact surface of the press rollers and a horizontal plane is alpha, where alpha meets the following conditions: alpha is more than or equal to 0 degree and less than or equal to 90 degrees.
Optionally, the heating device comprises at least one of a gas heating device, a laser heating device or a microwave heating device.
According to the glass manufacturing method and system, after the high surface roughness area is determined in the primary formed glass plate, the heating energy parameter of the high surface roughness area is determined according to the surface data of the high surface roughness area, and the surface of the high surface roughness area is heated according to the heating energy parameter, so that the glass plate with reduced surface average roughness of the high surface roughness area is obtained.
Therefore, after the heating energy parameter is determined according to the heat required by the surface melting of the high surface roughness area, the surface of the high surface roughness area is heated according to the heating energy parameter, so that after the high surface roughness area absorbs heat, the surface average roughness of the high surface roughness area is reduced, and the glass plate with reduced surface average roughness of the high surface roughness area is obtained, so that subsequent grinding, polishing and other procedures are not needed, and the manufacturing procedure of the glass plate is simplified.
Drawings
FIG. 1 is a schematic diagram of a glass manufacturing system of the present application;
FIG. 2 is a schematic flow chart of a first embodiment of the glass manufacturing method of the present application;
FIG. 3 is a schematic illustration of the forming of the primary formed glass of the present application;
FIG. 4 is a schematic flow chart of a second embodiment of the glass manufacturing process of the present application;
FIG. 5 is a schematic flow chart of a third embodiment of a glass manufacturing method of the present application;
FIG. 6 is a schematic view of the thickness and heating depth of the preformed glass sheet of the present application.
The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Because prior art, in glass board shaping in-process, glass fuse-element is pressed through the contact with the compression roller and is formed the glass board, because there is certain roughness on the compression roller surface, consequently also have certain roughness on the glass board surface of compression molding, when glass board surface roughness is great, need carry out a series of processes such as grinding, grinding and polishing and reduce the roughness on glass surface, and then make glass preparation process comparatively loaded down with trivial details.
The application provides a solution, after determining the heating energy parameter of high surface roughness region and high surface roughness region in the preliminary shaping glass board, according to heating energy parameter, heat the surface of high surface roughness region, after can making the unsmooth part in the high surface roughness region absorb heat, reduce the surface average roughness in high surface roughness region to obtain the glass board that the surface average roughness in high surface roughness region reduces, thereby need not carry out follow-up grinding, lapping and polishing scheduling procedure again, and then simplified the preparation process of glass board.
Embodiments of the present application will now be described with respect to a glass manufacturing system 100 applied in the implementation of the techniques of the present application:
referring to fig. 1, fig. 1 is a schematic structural view of a first embodiment of a glass manufacturing system of the present application, the system including a forming unit 10, a data acquisition device 20, a heating device 30, and a control device 40; wherein,
the forming unit 10 for forming a glass melt to form a primary formed glass sheet;
the data acquisition device 20 is used for acquiring surface data of a high surface roughness area in the preformed glass plate;
the heating device 30 is configured to output an energy beam to the high surface roughness area according to a heating energy parameter, and heat the surface of the high surface roughness area; wherein the heating device is arranged downstream of the forming unit;
the control device 40 comprises a processor 401, a memory 402 and a glass manufacturing program stored in the memory 402, which when run by the processor realizes the steps of the glass manufacturing method as provided in the method embodiments below.
Specifically, the forming unit includes a plurality of press rolls spaced apart from each other in a vertical direction, that is, the forming unit is composed of one or more pairs of press rolls, and when the plastic low liquidus viscosity glass melt passes through a gap composed of one or more pairs of press rolls and exits at a certain speed, a pre-formed glass sheet can be obtained. Wherein, the direction that the glass melt left the contact surface of compression roller and the contained angle that glass conveying surface formed are alpha, and alpha satisfies: 0 ° < α <90 °. The data acquisition device 20 is disposed downstream of the forming unit press rolls so as to be operable to acquire various physical quantities of the as-formed glass sheet 50, such as temperature, viscosity, area, etc., and convert it into analog electrical signals. In the embodiment of the present application, the data acquisition device may be a measuring device optical profilometer or an infrared thermometer, which is not limited in this embodiment. The meter optics may be ZYGO New View 9000.
A heating device 30 is also disposed downstream of the forming unit press rolls so that the pre-formed glass sheet can be heated. The heating device comprises at least one of a gas heating device, a laser heating device or a microwave heating device. It will be appreciated that in a particular manufacturing process, the heating means may be one of a gas heating means, a laser heating means or a microwave heating means, or a plurality of heating means may be activated and operated.
In the embodiment of the present application, after the preformed glass sheet is formed in the forming unit 10 and leaves the forming unit 10, the control device 40 may send a data acquisition instruction to the data acquisition device 20, so that the data acquisition device 20 instructs to acquire the surface data of the high surface roughness region in the preformed glass sheet based on the data acquisition instruction.
The control means 40 obtains heating energy parameters of the high surface roughness area based on the surface data. And then sending an energy output instruction to the heating device 30, so that when the heating device 30 receives the energy output instruction, outputting an energy beam to the high surface roughness area according to the heating energy parameter, and heating the surface of the high surface roughness area, so that after the surface of the high surface roughness area absorbs heat energy, the roughness of the surface of the primary formed glass plate can be reduced, and the surface average roughness of the primary formed glass plate is smaller than the preset surface roughness.
Based on the above-described hardware structure for glass manufacturing, but not limited to the above-described hardware structure, the present application provides a first embodiment of a glass manufacturing method. Referring to fig. 2, fig. 2 shows a schematic flow chart of a first embodiment of a method for applying glass manufacturing.
It should be noted that although a logical order is depicted in the flowchart, in some cases the steps depicted or described may be performed in a different order than presented herein.
In this embodiment, the method includes:
s10, determining a high surface roughness area from the primary formed glass plate;
the main body of execution of the glass manufacturing method is a control device, and the control device may be a PLC control host having display and interaction functions, such as a PLC control host, and the embodiment is not limited thereto. For example, the interaction between the control device and the user can be that the PLC control host computer determines the high surface roughness area on the surface of the primary formed glass after receiving the determination instruction input by the user.
In the embodiments of the present application, the preformed glass plate may be a glass plate that has not been subjected to a next process after the glass melt has been compression molded and has a certain viscosity. And it is emphasized that in this embodiment, the preformed glass sheet has a low liquidus viscosity characteristic. It is well known that when glass, initially in the molten state, is contacted at a sufficiently low temperature for a significant period of time, a crystalline phase begins to form. The temperature at which these crystalline phases begin to form is referred to as the liquidus temperature. Crystallization points can also be indicated by liquidus viscosity, which is the viscosity of a particular glass at the liquidus temperature. In particular, the glass liquidus viscosity may be less than 10 5 And (5) parking. As shown with reference to fig. 3, glass melt 101 is formed in a forming unit (which may include a press roll therein), and the viscosity of the glass melt may range from 5 poise to about 6 x 10 3 The preform glass sheet obtained by rolling the glass melt with the press roll is discharged from the contact surface of the press roll 102a and the press roll 102b at a speed at which the viscosity of the preform glass sheet may be about 10 4 Poise to about 1.5X10 6 And (5) parking.
It is worth mentioning that the angle alpha formed by the direction of the velocity of the glass sheet leaving the contact surface of the press roll and the horizontal plane may be from 0 deg. to 90 deg..
The high surface roughness region may be a region of the surface of the as-formed glass sheet having a surface average roughness greater than a predetermined surface roughness. Specifically, in this embodiment, the distribution of surface roughness values over the various regions of the as-formed glass sheet may be determined by an optical profiler to determine the regions of high surface roughness.
Step S20, obtaining surface data of the high surface roughness area;
in embodiments of the present application, the surface data may be a physical quantity such as temperature, roughness, area, or viscosity of the surface of the preformed glass sheet.
For example, after the PLC control host determines the high surface roughness region from the preformed glass sheet, the PLC control host receives a surface data acquisition command input by a user, and controls the data acquisition device 20 to acquire surface data of the high surface roughness region, such as surface average roughness of the high surface roughness region, area of the high surface roughness region, surface viscosity, and surface average temperature, in the preformed glass sheet.
Step S30, according to the surface data, obtaining heating energy parameters of the high surface roughness area;
and step S40, heating the surface of the high surface roughness area according to the heating energy parameter so as to obtain the glass plate with the reduced surface average roughness of the high surface roughness area after heating.
The preset surface roughness is acceptable or good, i.e., the surface roughness required to heat the surface of the high surface roughness region of the as-formed glass sheet.
The heating energy parameter is the energy of the heat flow required for the high surface roughness region on the as-formed glass sheet to be processed to a qualified, or good, glass sheet, i.e., the surface roughness region reaches a preset surface roughness. Specifically, the heating energy parameter may be calculated from the surface data obtained in step S30.
In this embodiment, after the PLC control host obtains the surface data of the high surface roughness region in the preformed glass plate, according to the surface data, the heating energy parameter of the high surface roughness region is obtained, and after the surface of the high surface roughness region is heated according to the heating energy parameter, the surface average roughness of the high surface roughness region can be reduced after the high surface roughness region absorbs heat, so as to obtain the glass plate with reduced surface average roughness, so that the glass plate does not need to perform subsequent procedures such as grinding, polishing, and the like, and further the manufacturing procedure of the glass plate is simplified.
Further, as one embodiment, referring to fig. 4, the present application provides a second embodiment of a glass manufacturing method. Based on the embodiment shown in fig. 4, in this embodiment, the step S20 includes:
step S20 adaptation becomes step S201, where at least one of surface average roughness, high surface roughness area, surface average temperature, ratio of energy coefficient to surface viscosity logarithm is obtained.
In embodiments of the present application, the surface data includes surface average roughness of the high surface roughness region, high surface roughness region area, ratio of energy coefficient to surface viscosity, and surface average temperature. The surface roughness of a preformed glass sheet is generally expressed as the average roughness of the preformed glass sheet. The average roughness may be the difference between the highest point and the lowest point in the vertical direction at any two points 1mm apart on the surface of the high surface roughness area after the initial glass sheet is placed on the horizontal plane. The difference can be determined by a profiler ZYGO NewView 9000. And the difference may be based on a standard measurement of I SO 4287, further, the difference may refer to an arithmetic mean height Ra. The high surface roughness region may be a region of the as-formed glass sheet having a surface average roughness greater than a predetermined average roughness.
In one embodiment of the present application, the preformed glass sheet is obtained from a plastic low liquidus viscosity glass melt after being press roll molded in a molding unit, the preformed glass sheet having a viscosity of 10 4 Poise to 1.5×10 6 Parking; the viscosity of the plastic low liquidus viscosity glass melt is 5 poise to 6 x 10 3 Parking; the glass sheet may have a thickness of less than 1200 microns.
Specifically, after the primary formed glass plate is obtained, a preset surface roughness and a fixed parameter of the glass plate are further set, and the ratio of the surface average roughness to the preset surface roughness is compared with the fixed parameter to obtain the ratio of the energy coefficient to the logarithm of the surface viscosity, so that the control device obtains the heating energy parameter according to the area of the high surface roughness area, the surface average temperature, the ratio of the energy coefficient to the logarithm of the surface viscosity and a heating energy formula, wherein the heating energy parameter formula is as follows:
P＝[(lgμ+A) -1 ×B+C-T n ]×S n ×k
wherein P is a heating energy parameter, A, B, C is an intrinsic property of the glass sheet, k is an energy coefficient, T n Surface average for nth high surface roughness zoneTemperature, S n The area of the high surface roughness region which is the nth high surface roughness region, μ is the viscosity of the nth high surface roughness region. For example, two regions of high surface roughness are defined in the preformed glass sheet, the surface average temperature of the first region of high surface roughness and the area of the region of high surface roughness being identified as T 1 、S 1 The average surface temperature and the area of the second high surface roughness area are respectively marked as T 2 、S 2 。
It will be appreciated that for any particular preformed glass sheet, the intrinsic properties A, B, C of the glass sheet are known values.
The fixed parameters may be adjusted according to the process production needs, e.g. the fixed parameters may be 10.
In an example, after the surface average roughness of the high surface roughness area is obtained, whether the ratio of the surface average roughness to the preset surface roughness is not smaller than a fixed parameter is determined according to the ratio of the surface average roughness to the preset surface roughness. When the ratio is not less than a fixed parameter, the ratio of the energy coefficient k to the log lgμ of the surface viscosity is in the range of 4×10 5 To 7.89×10 9 The ratio of the energy coefficient to the logarithm of the surface viscosity is in the range of 4 x 10 according to the area of the high surface roughness region, the surface average temperature 5 To 7.89×10 9 And a heating energy parameter formula, obtaining a first heating energy parameter of the high surface roughness region.
In another example, when the ratio is less than a fixed parameter, then the ratio of the energy coefficient to the log of the surface viscosity ranges from 3 x 10 2 Up to 4X 10 5 According to the area of the high surface roughness area, the average surface temperature, the ratio of the energy coefficient to the logarithm of the surface viscosity is 3 multiplied by 10 2 Up to 4X 10 5 And a heating energy parameter formula, obtaining a second heating energy parameter of the high surface roughness region.
Further, before the heating device is controlled to output the energy beam to the surface of the high surface roughness area according to the heating energy parameter, the energy parameter output by the heating energy device needs to be obtained, when the energy parameter is smaller than the heating energy parameter, the energy parameter output by the heating device can be increased by properly increasing the output power of the heating device, so that the energy parameter output by the heating device is not smaller than the heating energy parameter, and the situation that the surface average roughness of the high surface roughness area of the initial formed glass plate is not reduced after the surface of the high surface roughness area is heated due to the fact that the energy parameter output by the heating device is smaller than the heating energy parameter is avoided.
In this embodiment, the ratio range of the energy coefficient to the logarithm of the surface viscosity is determined according to the ratio and the magnitude of the fixed parameter, so that the energy output by the heating device can be accurately controlled, so as to prevent the whole high surface roughness area from being burnt through due to the overlarge output energy of the heating device, or prevent the surface average roughness of the high surface roughness area of the glass sheet from being unable to be reduced after the heat energy is absorbed by the heating device, thereby obtaining the glass sheet with the surface average roughness of the high surface roughness area smaller than or equal to the preset surface roughness.
Further, referring to fig. 5, a third embodiment of the glass manufacturing method is provided, and based on the embodiment shown in fig. 5, in this embodiment, the step S40 includes:
s401, judging whether the energy parameter output by the single heating device is larger than or equal to the heating energy parameter;
s402, if the energy parameter output by the single heating device is larger than or equal to the heating energy parameter, controlling the single heating device to heat the surface of the high surface roughness area according to the heating energy parameter;
and S403, if the energy parameter of the energy beam output by the single heating device is smaller than the heating energy parameter, controlling at least two heating devices to heat the surface of the high surface roughness area according to the heating energy parameter.
It will be appreciated that in this embodiment, the heating means comprises at least one of a gas heating means, a laser heating means or a microwave heating means.
Specifically, when the heating device outputs an energy beam to the high surface roughness region according to the heating energy parameter, it is necessary to determine whether the energy contained in the energy beam output by the single heating device according to the heating energy parameter can completely cover the high surface roughness region. When the single heating device can completely cover the high surface roughness area according to the energy contained in the energy beam output by the heating energy parameter, any one of the gas heating device, the laser heating device and the microwave heating device is controlled to heat the surface of the high surface roughness area, so that the situation that the small high surface roughness area is burnt through due to the fact that too many heating devices output the energy beam to the same small high surface roughness area at the same time is avoided.
It can be understood that when the energy contained in the energy beam output by the single heating device according to the heating energy parameter cannot completely cover the high surface roughness area, at least two heating devices of the gas heating device, the laser heating device or the microwave heating device are controlled to heat the surface of the high surface roughness area, i.e. if the energy beam output by the single heating device cannot meet the energy required by melting the high surface roughness area, at least two heating devices of the gas heating device, the laser heating device or the microwave heating device are controlled to heat the surface of the high surface roughness area, so that the situation that obvious grooves appear on the heated glass panel due to the fact that the single heating device heats the high surface roughness area in turn is avoided.
It is worth mentioning that the at least one heating device is not limited to one or one type of heating device, and the at least one heating device may be two or more gas heaters, two or more laser heaters, two or more microwave heaters, one or more gas heaters and one or more laser heaters, one or more gas heaters and one or more microwave heaters, one or more laser heaters and one or more microwave heaters. Of course, the heating device also comprises a heat flow guiding device corresponding to each of the gas heating device, the laser heating device or the microwave heating device.
It should be noted that, at least one heating device is controlled to output an energy beam to the high surface roughness area according to the heating energy parameter, and a portion, which is not more than one third of the surface thickness of the high surface roughness area, is heated to obtain a glass plate with a surface average roughness less than a preset surface roughness. Referring to fig. 6, the thickness of the glass sheet in the forming process is H, and when the high surface roughness region receives the heat flow generated by the heating device to perform surface heating, the heated depth of the high surface roughness region is d, so as to satisfy the following conditions:
in this embodiment, the number of heating devices outputting energy beams to the high surface roughness area is determined according to whether the energy beams output by a single heating device can satisfy the energy required for melting the high surface roughness area, so that the situation that the small high surface roughness area is deformed due to the fact that too many heating devices simultaneously output energy beams to the same small high surface roughness area can be avoided, or the high surface roughness area cannot be covered completely due to the fact that the energy output by a single heating device has an upper limit, and the heating efficiency of the heating device on the surface of the high surface roughness area is reduced.
For ease of understanding, the following examples illustrate:
example one:
glass melts having a 6000 poise liquidus viscosity profile were pressed on a forming apparatus in order to produce glass sheets having acceptable surface average roughness of 100 nanometers. After the glass sheet is formed, the surface average roughness of a specific area of the glass sheet is detected by means of a determinator optical profiler. Determined by the surface roughness distribution to be 38mm in area 2 The glass had an excessive surface roughness of 900 nm in position and the area was marked. Further, on the molding apparatus, the average temperature of the region was 1030 ℃ as measured by an infrared thermometer. The control device calculates the gas heating by using the information dataThe heating energy parameter required to be generated by the device is 8.79×10 5 And controlling the heat flow to be directed at the surface of the high surface roughness region of the glass sheet such that 167 watts is absorbed by the glass surface in that region, which reduces the surface roughness of that region to the average roughness of the glass surface.
Example two:
a glass melt having a viscosity profile of 1500 poise liquidus was pressed on a forming apparatus in order to produce a glass plate having a acceptable surface average roughness of 50 nanometers. After the glass sheet is formed, the surface average roughness of a specific area of the glass sheet is detected by means of a determinator optical profiler. Determined by the surface roughness distribution to be 8mm in area 2 The glass had an excessive surface roughness of 1000 nm in position and the area was marked. Further, on the molding apparatus, the average temperature of the region was 930 ℃ as measured by an infrared thermometer. The control device calculates the heating energy parameters required by the gas heating device to be 4.95 multiplied by 10 by using the information data 6 And controlling the heat flow to be directed at the surface of the high surface roughness region of the glass sheet such that the heat flow is absorbed 2380 watts by the glass surface in that region, which reduces the surface roughness of that region to the average roughness of the glass surface.
Example three:
glass melts having a 1200 poise liquidus viscosity profile were pressed on a forming apparatus in order to produce acceptable glass sheets having a surface average roughness of 30 nanometers. After the glass sheet is formed, the surface average roughness of a specific area of the glass sheet is detected by means of a determinator optical profiler. Determined by the surface roughness distribution to be 5mm in an area 2 The glass had an excessive surface roughness of 800 nm in position and the area was marked. Further, on the molding apparatus, the average temperature of the region was measured by an infrared thermometer to be 900 ℃. The control device uses the information data to calculate the heating energy parameter of 2.47×10 needed by the gas heating device 7 And directing the heat flow at the surface of the high surface roughness region of the glass sheet such that the heat flow is absorbed 7420 watts by the glass surface in the region, which reduces the surface roughness of the region to the average roughness of the glass surface。
Wherein example two is a preferred example.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (14)
1. A method of making glass, the method comprising:
determining a high surface roughness region from the preformed glass sheet; wherein the primary formed glass plate is obtained by forming glass melt through a compression roller;
acquiring surface data of the high surface roughness region, the acquiring surface data of the high surface roughness region comprising:
acquiring at least one of surface average roughness, area of a high surface roughness area, surface average temperature, and ratio of an energy coefficient to logarithm of surface viscosity;
obtaining heating energy parameters of the high surface roughness area according to the surface data;
and heating the surface of the high surface roughness area according to the heating energy parameter to obtain the glass plate with the reduced surface average roughness of the high surface roughness area after heating.
2. The glass manufacturing method according to claim 1, wherein the acquiring surface data of the high surface roughness region comprises:
and setting preset surface roughness and fixed parameters, and comparing the ratio of the surface average roughness to the preset surface roughness with the fixed parameters to obtain the ratio of the energy coefficient to the surface viscosity logarithm.
3. The glass manufacturing method according to claim 2, wherein said comparing the ratio of the surface average roughness to the preset surface roughness with the fixed parameter to obtain the ratio of the energy coefficient to the logarithm of the surface viscosity comprises:
if the ratio of the average surface roughness to the preset surface roughness is not less than the fixed parameter, the ratio of the obtained energy coefficient to the surface viscosity logarithm is in the range of 4 multiplied by 10 5 To 7.89×10 9 The method comprises the steps of carrying out a first treatment on the surface of the And/or the number of the groups of groups,
if the ratio of the average surface roughness to the preset surface roughness is smaller than the fixed parameter, the ratio of the obtained energy coefficient to the surface viscosity logarithm is 3 multiplied by 10 2 Up to 4X 10 5 。
4. The glass manufacturing method according to claim 2, wherein the obtaining heating energy parameters of the high surface roughness region from the surface data comprises:
and obtaining heating energy parameters of the high surface roughness area according to the area of the high surface roughness area, the average surface temperature and the ratio of the energy coefficient to the logarithm of the surface viscosity.
5. The glass manufacturing method of claim 4, wherein the obtaining heating energy parameters of the high surface roughness region from the surface data comprises:
obtaining heating energy parameters of the high surface roughness area according to the area of the high surface roughness area, the surface average temperature, the ratio of the energy coefficient to the surface viscosity logarithm and an energy formula, wherein the energy formula comprises:
P＝[(lgμ+A) -1 ×B+C-T n ]×S n ×k，
wherein P is the heating energy parameter of the high surface roughness region, A, B, C is the intrinsic property of glass, lgμ is the logarithm of the surface viscosity, S n For the area of the high surface roughness area, T n K is the energy coefficient, which is the surface average temperature.
6. The glass manufacturing method according to claim 1, wherein the heating means for heating comprises at least one of a gas heating means, a laser heating means, or a microwave heating means; and/or the number of the groups of groups,
the heating device for heating is at least one.
7. The glass manufacturing method according to claim 1, wherein the heating the surface of the high surface roughness region according to the heating energy parameter to obtain a glass sheet with reduced surface average roughness of the heated high surface roughness region comprises:
and heating a part which is not more than one third of the surface thickness of the high surface roughness area according to the heating energy parameter so as to obtain the glass plate with reduced surface average roughness of the heated high surface roughness area.
8. The glass manufacturing method according to claim 1, wherein before the heating of the surface of the high surface roughness region according to the heating energy parameter, the method further comprises:
acquiring energy parameters output by a heating device;
and controlling the energy parameter output by the heating device according to the heating energy parameter, wherein the energy parameter output by the heating device is not smaller than the heating energy parameter.
9. The glass manufacturing method according to claim 8, wherein controlling the energy parameter output by the heating device according to the heating energy parameter comprises:
judging whether the energy parameter output by the single heating device is larger than or equal to the heating energy parameter;
if the energy parameter output by the single heating device is larger than or equal to the heating energy parameter, controlling the single heating device to heat the surface of the high surface roughness area according to the heating energy parameter;
and if the energy parameter of the energy beam output by the single heating device is smaller than the heating energy parameter, controlling at least two heating devices to heat the surface of the high surface roughness area according to the heating energy parameter.
10. The glass manufacturing method according to claim 1, wherein the viscosity of the glass melt is 5 poise to 6 x 10 3 Parking; and/or the number of the groups of groups,
the viscosity of the preformed glass plate is 10 4 Poise to 1.5×10 6 And (5) parking.
11. The glass manufacturing method according to claim 2, wherein the heating the surface of the high surface roughness region according to the heating energy parameter to obtain a glass sheet with reduced surface average roughness of the heated high surface roughness region comprises:
and heating the surface of the high surface roughness area according to the heating energy parameter to obtain the glass plate with the surface average roughness of the heated high surface roughness area smaller than or equal to the preset surface roughness.
12. A glass manufacturing system, comprising:
a forming unit for forming a glass melt to form a primary formed glass sheet;
the data acquisition device is used for acquiring surface data of a high surface roughness area in the primary formed glass plate;
the heating device is used for outputting an energy beam to the high surface roughness area according to the heating energy parameter and heating the surface of the high surface roughness area; wherein the heating device is arranged downstream of the forming unit;
a control device comprising a processor, a memory and a glass manufacturing program stored in the memory, which when executed by the processor, performs the steps of the glass manufacturing method according to any of claims 1-11.
13. The glass manufacturing system of claim 12, wherein the forming unit comprises at least one pair of press rolls, the direction of the velocity of the glass melt exiting the contact surface of the press rolls forming an angle α with the horizontal, α satisfying: alpha is more than or equal to 0 degree and less than or equal to 90 degrees.
14. The glass manufacturing system of claim 13, wherein the heating device comprises at least one of a gas heating device, a laser heating device, or a microwave heating device.
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