CN109354389B - Spherical glass processing technology - Google Patents
Spherical glass processing technology Download PDFInfo
- Publication number
- CN109354389B CN109354389B CN201810975786.7A CN201810975786A CN109354389B CN 109354389 B CN109354389 B CN 109354389B CN 201810975786 A CN201810975786 A CN 201810975786A CN 109354389 B CN109354389 B CN 109354389B
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- China
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- glass
- heating
- air grid
- roller way
- forming roller
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/025—Re-forming glass sheets by bending by gravity
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/04—Tempering or quenching glass products using gas
- C03B27/044—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position
- C03B27/0442—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position for bent glass sheets
Abstract
The invention discloses a spherical glass processing technology, which comprises glass loading, glass heating, glass hot bending forming and glass unloading, and is characterized in that the glass heating is realized by simultaneously heating glass through upper and lower heating wires arranged above and below a heating roller way group in a heating furnace, the heating temperature above the glass is higher than that below the glass, the heating temperature above the glass is subjected to zone heating, and the heating temperature above the glass gradually decreases from the outer edge to the middle; the glass hot-bending forming is to move the heated glass out of the heating furnace and convey the heated glass to a forming roller way, so that the fully softened glass is gradually formed along with the forming roller way under the action of self gravity, and meanwhile, the temperature of the glass is reduced and the glass is tempered by the forced ventilation of the upper air grid and the lower air grid.
Description
Technical Field
The invention relates to the technical field of glass processing, in particular to a spherical glass processing technology.
Background
Curved glass is used in a wide variety of modern applications and provides an aesthetically pleasing visual appearance, such as decorative walls, buildings, balconies, furniture, and the like. Generally, the glass is manufactured by heating, softening and molding the prepared plate glass in a mold according to the use condition and then annealing. With the rapid development of social industrialization, the use demand of people for glass is continuously increased, and the quality requirement for the glass is continuously improved, so that how to improve the production efficiency under the condition of ensuring the quality becomes the competitive direction of the glass processing industry.
At present, the glass bending process flow is loading-heating-bending-forming-cooling-unloading, namely, the flat glass is firstly placed on a loading section and is conveyed into a heating section by a loading roller way to be heated and softened, the softened glass enters a bending-forming section to be deformed according to a bending roller way group, and then the glass is further close to an ideal arc after reciprocating motion; finally, the shaping purpose is achieved through air blowing and cold quenching of the air grid, and then the material is discharged.
The curved glass production uses curved steel rod and flexible axle etc. equipment more now, but this kind of glass tempering equipment, when production curved surface toughened glass, can only produce a single curved surface glass, can't produce spherical glass, perhaps to the unable accurate control of spherical camber in the in-process of production for the curved glass of production warp, lead to in the use of reality, polylith spherical glass can't splice, therefore cause economic loss, moreover at the great in-process of glass size.
Disclosure of Invention
The invention aims to provide a spherical glass processing technology to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a spherical glass processing technology comprises glass loading, glass heating, glass hot bending forming and glass unloading, and is characterized in that,
the glass heating is to heat the glass simultaneously by an upper heating wire and a lower heating wire which are arranged above and below the heating roller way group in the heating furnace, the heating temperature above the glass is higher than the heating temperature below the glass, the heating temperature above the glass is heated in a partition mode, and the heating temperature above the glass is gradually decreased from the outer edge to the middle;
the glass hot-bending forming is to be heated the glass shifts out the heating furnace and transports to the shaping roll table, adjusts the radian of upper and lower air grid and shaping roll table, opens upper and lower air grid and adjusts the wind pressure of upper and lower air grid respectively, makes the glass after fully softening under the action of self gravity along with the shaping roll table shaping gradually, lower cooling tempering under the forced draft of upper and lower air grid simultaneously.
As a further scheme of the invention: and the fully softened glass performs reciprocating motion on the forming roller way, and the reciprocating distance is 5-10cm greater than the arc length of the glass.
As a further scheme of the invention: the heating temperature above the glass is 705-725 ℃, and the heating temperature below the glass is 680-690 ℃.
As a further scheme of the invention: the heating time is 330s-680 s.
As a further scheme of the invention: and the starting time of the air blowing of the upper air grid and the lower air grid lags behind the adjustment time of the bending radian of the forming roller way, and the lag time is 20-25 s.
As a further scheme of the invention: the air pressure of the upper air grid is smaller than that of the lower air grid, the air pressure of the upper air grid is 1200pa, and the air pressure of the lower air grid is 3000 pa.
As a further scheme of the invention: the blowing time of the upper air grid and the lower air grid is 200-300 s.
As a further scheme of the invention: the distance from the air outlet of the upper air grid to the upper surface of the glass on the forming roller way is 40-50mm, and the distance from the air outlet of the lower air grid to the lower surface of the glass is 20 mm.
As a further scheme of the invention: the bending radians of the upper air grid, the lower air grid and the forming roller way are the same as the radian of the finished glass product.
As a further scheme of the invention: the diameter of the roller wheel on the forming roller way is of a gradual change structure.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the method, the glass is heated in a reciprocating manner by heating the ceramic roller way in the process of heating the glass, so that the glass is heated more uniformly, the influence of the ceramic roller way on the glass heating is reduced, the heating temperature above the glass is higher than the heating temperature below the glass, in addition, the heating temperature above the glass is heated in a partitioned manner, so that the heating temperature of the upper end surface of the glass is gradually reduced from external aid to the middle, the heated glass receives different internal stresses in the forming process from the external aid of the glass and the middle part of the glass in the cooling process, and further, stable bending is formed towards the middle around the action of the internal stress, so that the spherical glass can be processed;
2 the forming roller way starts bending deformation after the fully softened glass reaches the forming roller way, and after the forming roller way starts bending deformation, the blowing time of the upper air grid and the lower air grid lags behind the bending start time of the forming roller way, so that the glass toughening start time can be delayed, the glass can be kept in a softening state for a long time after being discharged from a furnace, the glass forming speed is improved, meanwhile, the cooling of the front end and the rear end of the glass can be started simultaneously, the temperature difference of the front end and the rear end of the glass is reduced, the glass radian control precision in the forming process is increased, and the toughened glass granularity can be better;
3. in the process of cooling and toughening the glass, the air pressure of the upper air grid is smaller than that of the lower air grid, so that the temperature reduction rate of the upper end of the glass is smaller than that of the lower end surface of the glass in the process of cooling and toughening the glass, and the internal stress of the upper end surface and the lower end surface of the glass is different due to the difference of local temperatures in the process of cooling and toughening the glass, so that the upward bending rate of the glass is further accelerated, the bending rate of the glass is accelerated, the problem that the glass is cooled to the toughening temperature before being formed can be effectively solved, and the production quality is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1;
a spherical glass processing technology comprises the following steps:
step 1, glass loading: cleaning and drying glass with the size of 1.5m by 6mm, placing the treated glass at the upper end of a feeding roller way, and conveying the glass into a heating furnace through the feeding roller way;
step 2, glass heating: the glass heating is to heat the glass simultaneously by an upper heating wire and a lower heating wire which are arranged above and below the heating roller way group in the heating furnace, the heating temperature above the glass is higher than the heating temperature below the glass, and the heating temperature above the glass is heated in a partition mode, wherein the temperature of the front end and the rear end along the moving direction of the glass is 725 ℃, the heating temperature of the end parts at the two sides along the moving direction of the glass is 725 ℃, the heating temperature of the middle position of the glass is 690 ℃, the heating temperature above the glass is gradually decreased from the outer edge to the middle, and the heating time of the glass is 330 s;
step 3, glass hot bending forming: the glass hot bending forming is to move the heated glass out of a heating furnace and convey the glass to a forming roller way, when the fully softened glass moves above the forming roller way, the radian of an upper air grid, a lower air grid and the forming roller way is adjusted, the upper air grid and the lower air grid are opened, the air pressure of the upper air grid is adjusted to be 1200pa, the distance between the upper air grid and the upper end surface of the glass is 250mm, the air pressure of the lower air grid is adjusted to be 3000pa, the distance between the lower air grid and the lower end surface of the glass is 20mm, after the glass reaches the forming roller way, the upper air grid and the lower air grid lag 20s, air blowing is started for cooling to temper the glass, the air blowing time is 200s, in the process of cooling and tempering, the glass reciprocates along with the forming roller way, and the reciprocating distance is 5-10cm longer than the arc length of the glass;
the forming roller way uses a flexible shaft roller way, and the size of roller wheels on the forming roller way is gradually reduced from two ends to the middle along the axial direction of the forming roller way; the size of the roller wheels on the forming roller way is gradually reduced from the front end to the rear end to the middle along the glass running direction;
step 4, unloading glass: and continuously cooling the tempered glass until the temperature is normal, and then moving the tempered glass to an unloading roller way for unloading.
Example 2;
a spherical glass processing technology comprises the following steps:
step 1, glass loading: cleaning and drying glass with the size of 1.5m by 8mm, placing the treated glass at the upper end of a feeding roller way, and conveying the glass into a heating furnace through the feeding roller way;
step 2, glass heating: the glass heating is to heat the glass simultaneously by an upper heating wire and a lower heating wire which are arranged above and below the heating roller way group in the heating furnace, the heating temperature above the glass is higher than the heating temperature below the glass, and the heating temperature above the glass is heated in a partition mode, wherein the temperature of the front end and the rear end along the moving direction of the glass is 710 ℃, the heating temperature of the end parts of the two sides along the moving direction of the glass is 705 ℃, the heating temperature of the middle position of the glass is 690 ℃, the heating temperature above the glass is gradually decreased from the outer edge to the middle, and the heating time of the glass is 460 s;
step 3, glass hot bending forming: the glass hot bending forming is to move the heated glass out of a heating furnace and convey the glass to a forming roller way, when the fully softened glass moves above the forming roller way, the radian of an upper air grid, a lower air grid and the forming roller way is adjusted, the upper air grid and the lower air grid are opened, the air pressure of the upper air grid is adjusted to be 500pa, the distance between the upper air grid and the upper end surface of the glass is 200mm, the air pressure of the lower air grid is adjusted to be 1600pa, the distance between the lower air grid and the lower end surface of the glass is 20mm, the upper air grid and the lower air grid lag 25s after the glass reaches the forming roller way to begin to blow and cool the glass, the blowing time is 300s, in the cooling and tempering process, the glass reciprocates along with the forming roller way, and the reciprocating distance is 5-10cm longer than the arc length of the glass;
the forming roller way uses a flexible shaft roller way, and the size of roller wheels on the forming roller way is gradually reduced from two ends to the middle along the axial direction of the forming roller way; the size of the roller wheels on the forming roller way is gradually reduced from the front end to the rear end to the middle along the glass running direction;
step 4, unloading glass: and continuously cooling the tempered glass until the temperature is normal, and then moving the tempered glass to an unloading roller way for unloading.
Example 3;
a spherical glass processing technology comprises the following steps:
step 1, glass loading: cleaning and drying glass with the size of 1.5 x 10mm, placing the treated glass at the upper end of a feeding roller way, and conveying the glass into a heating furnace through the feeding roller way;
step 2, glass heating: the glass heating is to heat the glass simultaneously by an upper heating wire and a lower heating wire which are arranged above and below the heating roller way group in the heating furnace, the heating temperature above the glass is higher than the heating temperature below the glass, and the heating temperature above the glass is heated in a partition mode, wherein the temperature of the front end and the rear end along the moving direction of the glass is 710 ℃, the heating temperature of the end parts of the two sides along the moving direction of the glass is 705 ℃, the heating temperature of the middle position of the glass is 680 ℃, the heating temperature above the glass is gradually decreased from the outer edge to the middle, and the heating time of the glass is 680 s;
step 3, glass hot bending forming: the glass hot bending forming is to move the heated glass out of a heating furnace and convey the glass to a forming roller way, when the fully softened glass moves above the forming roller way, the radian of an upper air grid, a lower air grid and the forming roller way is adjusted, the upper air grid and the lower air grid are opened, the air pressure of the upper air grid is adjusted to be 200pa, the distance between the upper air grid and the upper end surface of the glass is 250mm, the air pressure of the lower air grid is adjusted to be 900pa, the distance between the lower air grid and the lower end surface of the glass is 20mm, after the glass reaches the forming roller way, the upper air grid and the lower air grid lag 20s to start blowing and cooling to temper the glass, the blowing time is 200s, in the process of cooling and tempering, the glass reciprocates along with the forming roller way, and the reciprocating distance is 5-10cm longer than the arc length of the glass;
the forming roller way uses a flexible shaft roller way, and the size of roller wheels on the forming roller way is gradually reduced from two ends to the middle along the axial direction of the forming roller way; the size of the roller wheels on the forming roller way is gradually reduced from the front end to the rear end to the middle along the glass running direction;
step 4, unloading glass: and continuously cooling the tempered glass until the temperature is normal, and then moving the tempered glass to an unloading roller way for unloading.
The granularity of the spherical toughened glass produced by the processing technology can meet the toughening requirement, the spherical curvature of the molded glass is accurate, the spherical glass with the arch height of 300m is produced, and the minimum radius of the spherical glass can reach 880 m.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A spherical glass processing technology comprises glass loading, glass heating, glass hot bending forming and glass unloading, and is characterized in that,
the glass heating is to heat the glass simultaneously by an upper heating wire and a lower heating wire which are arranged above and below the heating roller way group in the heating furnace, the heating temperature above the glass is higher than the heating temperature below the glass, the heating temperature above the glass is heated in a partition mode, and the heating temperature above the glass is gradually decreased from the outer edge to the middle;
the glass hot-bending forming is to move the heated glass out of the heating furnace and convey the glass to a forming roller way, adjust the radian of the upper air grid, the lower air grid and the forming roller way, open the upper air grid and the lower air grid and respectively adjust the air pressure of the upper air grid and the lower air grid, so that the fully softened glass is gradually formed along with the forming roller way under the action of self gravity, meanwhile, the forced ventilation and temperature reduction tempering of the upper air grid and the lower air grid are carried out, the air blowing starting time of the upper air grid and the lower air grid lags behind the bending radian adjusting time of the forming roller way, the lag time is 20s-25s, the distance from the air outlet of the upper air grid to the upper surface of the glass positioned on the forming roller way is 40-50mm, the distance from the air outlet of the lower air grid to the lower surface of the glass is 20mm, the air pressure of the upper air grid is smaller than that of the lower air grid, the air pressure of the upper air grid is 1200pa, and the air pressure of the lower air grid is 3000 pa.
2. The spherical glass processing process according to claim 1, wherein the fully softened glass is reciprocated on a forming roller way by a distance greater than the arc length of the glass by 5-10 cm.
3. The spherical glass processing process according to claim 1, wherein the heating temperature above the glass is 705-725 ℃ and the heating temperature below the glass is 680-690 ℃.
4. The spherical glass processing process according to claim 1, wherein the heating time is 330s-680 s.
5. The spherical glass processing process according to claim 1, wherein the blowing time of the upper and lower air grids is 200s-300 s.
6. The spherical glass processing process according to claim 1, wherein the bending radians of the upper and lower air grid and the forming roller table are the same as the finished radian of the glass.
7. The spherical glass processing process according to claim 1, wherein the diameter of the roller wheel on the forming roller table is of a gradual change structure.
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| CN201810975786.7A CN109354389B (en) | 2018-08-24 | 2018-08-24 | Spherical glass processing technology |
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| CN201810975786.7A CN109354389B (en) | 2018-08-24 | 2018-08-24 | Spherical glass processing technology |
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| CN109354389A CN109354389A (en) | 2019-02-19 |
| CN109354389B true CN109354389B (en) | 2022-03-22 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110128000B (en) * | 2019-05-14 | 2021-11-26 | 合肥中科衡金工业自动化有限公司 | Production process of curved toughened glass |
| CN110818234A (en) * | 2019-11-22 | 2020-02-21 | 福耀玻璃(苏州)有限公司 | Large spherical glass forming process |
| CN113277717B (en) * | 2021-05-19 | 2022-09-09 | 河南环宇玻璃科技股份有限公司 | Forming process and processing equipment for hyperbolic glass |
| CN113213738A (en) * | 2021-06-03 | 2021-08-06 | 南京北泰玻璃制品有限公司 | Prevent continuous tempering former of glass of roll table abrasion mark |
| CN114085028A (en) * | 2021-11-09 | 2022-02-25 | 福耀集团(福建)机械制造有限公司 | Processing equipment and glass forming system |
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| CN1118769A (en) * | 1994-04-15 | 1996-03-20 | 菲尔金顿玻璃有限公司 | Bending and tempering glass sheets |
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| US4139359A (en) * | 1977-11-02 | 1979-02-13 | Ppg Industries, Inc. | Method and apparatus for shaping glass sheets by roll forming |
| US4123246A (en) * | 1978-01-26 | 1978-10-31 | Ppg Industries, Inc. | Shaping and quenching glass sheets by roll forming using transition quench rolls |
| CN1068567C (en) * | 1995-08-21 | 2001-07-18 | 高学明 | Method for making toughened glass with single curved surface |
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| CN87106435A (en) * | 1986-09-22 | 1988-05-11 | 基罗和塔姆格拉斯联合股票公司 | Make the curved method and apparatus with tempering of sheet glass |
| CN1118769A (en) * | 1994-04-15 | 1996-03-20 | 菲尔金顿玻璃有限公司 | Bending and tempering glass sheets |
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