CN110818234A - Large spherical glass forming process - Google Patents
Large spherical glass forming process Download PDFInfo
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- CN110818234A CN110818234A CN201911156688.1A CN201911156688A CN110818234A CN 110818234 A CN110818234 A CN 110818234A CN 201911156688 A CN201911156688 A CN 201911156688A CN 110818234 A CN110818234 A CN 110818234A
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- glass
- heating
- roller
- air grid
- forming
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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
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
- C03B23/033—Re-forming glass sheets by bending by press-bending between shaping moulds in a continuous way, e.g. roll forming, or press-roll bending
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- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
Abstract
The invention discloses a large spherical glass forming process which comprises the following steps of ① glass cutting and feeding, namely cutting glass according to set parameters, placing the cut glass on a ceramic roller, conveying and positioning the cut glass into a BT furnace for heating, ② glass heating, heating the surface of the glass through an upper heating wire and a lower heating wire of a heating roller way in the BT furnace, ③ glass hot bending forming, namely conveying the glass which is completely softened by heating to a roller way forming machine, wherein a self-adaptive reducing roller forming assembly, an upper air grid and a lower air grid are arranged in the forming machine, the glass is pre-bent through an upper air grid air nozzle and a lower air grid and is formed through the self-adaptive reducing roller forming assembly, ④ glass toughening, wherein the upper air grid and the lower air grid are opened for blowing the glass after the glass is formed through the hot bending, the process can adapt to the glass forming of a large-profile, the self-adaptive adjustment can be carried out under the condition that the glass profile is suddenly changed in the forming process, the product quality is improved.
Description
Technical Field
The invention relates to a large spherical glass forming process, and belongs to the technical field of glass forming.
Background
At present, with the development of social industrialization, the requirements of customers on window glass are higher and higher, and the arc spherical glass is widely applied to the fields of automobiles, decoration, aviation and the like. The whole process flow is that after the float glass with different thickness is cut into needed size by a Bandong cutter, washed, dried and printed with trademark, the float glass enters a BT furnace to heat the upper and lower surfaces of the glass, the glass after being completely softened is transitionally transmitted to a roller forming machine, adjusted to the radian on the forming machine, and ensured to be consistent with the radian of spherical glass needed by a client, and finally shaped by air grid cold quenching; the existing BT furnace tempering equipment can only produce glass with the spherical surface of 7.5mm at most, and cannot meet the requirements of existing customers.
The invention relates to a process method for combining a tempering air grid, which is used for automatically calibrating a glass molding profile and curvature by a self-adaptive diameter-variable roller, and combining glass gas balance heating and pressure-adjustable tempering air grid, so as to meet the requirement of glass with a spherical surface of 10 mm.
Disclosure of Invention
In view of the above technical problems, the present invention aims to: a shaping technology for large spherical glass is disclosed.
The technical solution of the invention is realized as follows: a large spherical glass forming process comprises the following steps:
① glass cutting and feeding, namely cutting the glass according to set parameters, putting the glass on a ceramic roller, conveying and positioning the glass into a BT furnace, and heating the glass;
② heating the glass, namely heating the surface of the glass by an upper heating wire and a lower heating wire of a heating roller way in the BT furnace, wherein the heating temperature above the glass is higher than the heating temperature below the glass, and heating the upper part and the lower part of the glass in a partitioning manner;
③ hot bending glass by conveying the heated and softened glass to a roller forming machine, wherein the forming machine is provided with an adaptive reducing roller forming assembly, an upper air grid and a lower air grid, the glass is pre-bent by an upper air grid and a lower air grid, and is hot bent and formed by the adaptive reducing roller forming assembly;
④ tempering the glass, opening the upper and lower air grids to blow the glass after hot bending forming, wherein the air pressure of the upper air grid is 8-30KPa, and the air pressure of the lower air grid is 8-33 KPa.
Preferably, in step ①, the glass is cut, washed and dried by a washing machine, and then printed and placed on a ceramic roller.
Preferably, in the step ②, the heating time in the BT furnace is 140-220s, the heating temperature above the glass is 540-740 ℃, the heating temperature below the glass is 550-770 ℃, and the heating temperatures of the front part, the middle part and the tail part of the upper side and the lower side of the glass are sequentially increased.
Preferably, the BT furnace is internally distributed with a balance air pipe which blows the glass in the BT furnace for balance heating; the balance gas pipes are stainless steel seamless pipes which are uniformly arranged in the front area of the BT furnace at equal intervals, and the stainless steel seamless pipes are arranged in parallel with the glass flowing direction.
Preferably, self-adaptation reducing roller forming assembly contains protruding roller and concave roller, and the curved surface of protruding roller and concave roller matches, and the both ends of protruding roller and concave roller all set up on the floating platform.
Preferably, the floating platform comprises a screw rod, a screw rod pair, a dovetail groove guide rail and a servo motor for driving the servo motor to move up and down.
Preferably, in the step ③, the pre-bending of the air nozzle is performed by intermittently blowing the glass on the roller table of the forming machine by the upper and lower air grids to assist in controlling the local curvature and the profile of the glass, and the intermittent blowing means blowing air by a high-frequency electromagnetic valve according to the position of the profile of the glass.
Preferably, the distance from the air outlet of the upper air grid to the surface of the glass is 4-5mm, and the distance from the air outlet of the lower air grid to the surface of the glass on the forming roller way is 3-4 mm.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
① can be used for large-profile glass forming;
② the reducing roller can be self-adaptive adjusted under the condition that the glass profile is suddenly changed in the forming process, thereby improving the product quality;
③ the air grid can be adjusted to meet the toughening stress standard;
④ the gas balance heating system facilitates glass heating uniformity, thereby improving optical performance and product quality.
Drawings
The technical scheme of the invention is further explained by combining the accompanying drawings as follows:
FIG. 1 is a schematic diagram of an adaptive reducing roll forming assembly according to the present invention.
Detailed Description
The present invention will be described with reference to examples.
Example 1:
the invention relates to a large spherical glass molding process, which comprises the following steps:
① glass cutting and feeding, cutting the glass into 873 x 603mm size by a Bandong machine, washing and drying by a washing machine, printing, transferring on a ceramic roller, positioning into a BT furnace, and heating.
② heating glass, namely heating the surface of the glass by an upper heating wire and a lower heating wire of a heating roller way in a furnace, wherein the heating temperature above the glass is higher than the heating temperature below the glass, and heating the glass in a subarea way, wherein the heating temperature at the front part of the upper glass is 540 ℃, the heating temperature at the middle part of the glass is 700 ℃, the heating temperature at the tail part of the glass is 740 ℃, the heating temperature at the front part of the lower glass is 550 ℃, the heating temperature at the middle part of the glass is 690 ℃, the heating temperature at the tail part of the glass is 749 ℃, the heating time of the glass in the whole furnace is 157s, balance air pipes are distributed in the BT furnace, blow air to the glass in the BT furnace by the balance air pipes, and carry out balanced heating, the balance air pipes are stainless steel seamless pipes which are uniformly arranged in the front area of the BT furnace at equal intervals, the stainless steel seamless pipes are arranged.
③ glass hot bending molding, wherein the glass is heated and softened completely and is transferred to a roller way molding machine, a self-adaptive reducing roller molding assembly and an upper air grid and a lower air grid are arranged in the molding machine, the glass is pre-bent through an upper air grid air nozzle and a lower air grid and is hot-bent and molded through the self-adaptive reducing roller molding assembly, the air nozzle pre-bending is to perform discontinuous air blowing on the glass on the roller way of the molding machine by the upper air grid and the lower air grid to assist in controlling the local curvature and the profile of the glass, the discontinuous air blowing means to perform air blowing according to the position of the profile of the glass by a high-frequency electromagnetic valve, as shown in figure 1, the self-adaptive reducing roller molding assembly comprises a convex roller 1 and a concave roller 2, the convex roller is matched with the profile of the concave roller, two ends of the convex roller and the concave roller are both arranged on a floating platform.
④ tempering glass, opening the upper and lower air grids after hot bending, adjusting the air pressure of the upper air grid to 30KPa, the distance between the upper air grid and the upper surface of the glass to 5mm, the air pressure of the lower air grid to 28KPa, the distance between the lower air grid and the lower surface of the glass to 4mm, and blowing the glass on the roller way for 6S.
Example 2:
the invention relates to a large spherical glass molding process, which comprises the following steps:
① glass cutting and feeding, cutting the glass into size of 1054 x 580mm by a Bandong machine, washing and drying by a washing machine, printing, transferring on a ceramic roller, positioning into a BT furnace, and heating.
② heating glass, namely heating the surface of the glass by an upper heating wire and a lower heating wire of a heating roller way in a furnace, wherein the heating temperature above the glass is higher than the heating temperature below the glass, heating the upper part and the lower part of the glass in a subarea manner, wherein the heating temperature at the front part of the upper glass is 560 ℃, the heating temperature at the middle part of the glass is 710 ℃, the heating temperature at the tail part of the glass is 750 ℃, the heating temperature at the front part of the lower glass is 550 ℃, the heating temperature at the middle part of the glass is 700 ℃, the heating temperature at the tail part of the glass is 740 ℃, the heating time of the glass in the whole furnace is 185s, balance air pipes are distributed in the BT furnace, blow air to the glass in the BT furnace by the balance air pipes, and carry out balanced heating, the balance air pipes are stainless steel seamless pipes which are uniformly arranged in the front area of the BT furnace at equal intervals.
③ glass hot bending molding, wherein the glass is heated and softened completely and is transferred to a roller way molding machine, a self-adaptive reducing roller molding assembly and an upper air grid and a lower air grid are arranged in the molding machine, the glass is pre-bent through an upper air grid air nozzle and a lower air grid and is hot-bent and molded through the self-adaptive reducing roller molding assembly, the air nozzle pre-bending is to perform discontinuous air blowing on the glass on the roller way of the molding machine by the upper air grid and the lower air grid to assist in controlling the local curvature and the profile of the glass, the discontinuous air blowing means to perform air blowing according to the position of the profile of the glass by a high-frequency electromagnetic valve, as shown in figure 1, the self-adaptive reducing roller molding assembly comprises a convex roller 1 and a concave roller 2, the convex roller is matched with the profile of the concave roller, two ends of the convex roller and the concave roller are both arranged on a floating platform.
④ tempering glass, opening the upper and lower air grids after hot bending, adjusting the air pressure of the upper air grid to 25KPa, the distance between the upper air grid and the upper surface of the glass to 5mm, adjusting the air pressure of the lower air grid to 20KPa, the distance between the lower air grid and the lower surface of the glass to 4mm, and blowing the glass on the roller way for 5S.
In the invention, the heat-to-flow balance is adjusted by the balance air pipe, so that the molded surface goodness of fit of large-scale surface glass is facilitated; the self-adaptive reducing roller forming structure is designed to ensure that a curvature transition section for forming large-size surface glass has abrupt change characteristics, and curvature deformation caused by abrupt change can be reduced by a self-adaptive reducing roller forming method, wherein the abrupt change refers to non-linear change and unsmooth surfaces of glass profiles; the air grid comprises uniformly distributed conical air nozzles and a pressure-adjustable proportional valve, and can be adjusted as required to enable the toughening stress to reach the standard.
The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (8)
1. The forming process of the large spherical glass is characterized by comprising the following steps of:
① glass cutting and feeding, namely cutting the glass according to set parameters, putting the glass on a ceramic roller, conveying and positioning the glass into a BT furnace, and heating the glass;
② heating the glass, namely heating the surface of the glass by an upper heating wire and a lower heating wire of a heating roller way in the BT furnace, wherein the heating temperature above the glass is higher than the heating temperature below the glass, and heating the upper part and the lower part of the glass in a partitioning manner;
③ hot bending glass by conveying the heated and softened glass to a roller forming machine, wherein the forming machine is provided with an adaptive reducing roller forming assembly, an upper air grid and a lower air grid, the glass is pre-bent by an upper air grid and a lower air grid, and is hot bent and formed by the adaptive reducing roller forming assembly;
④ tempering the glass, opening the upper and lower air grids to blow the glass after hot bending forming, wherein the air pressure of the upper air grid is 8-30KPa, and the air pressure of the lower air grid is 8-33 KPa.
2. The large spherical glass molding process according to claim 1, wherein in step ①, the glass is cut, washed and dried by a washing machine, printed and then placed on a ceramic roller.
3. The process for molding large spherical glass according to claim 1, wherein in step ②, the heating time in the BT furnace is 140-220s, the heating temperature above the glass is 540-740 ℃, the heating temperature below the glass is 550-770 ℃, and the heating temperatures at the front, middle and tail parts of the upper and lower sides of the glass are sequentially increased.
4. The large spherical glass molding process according to claim 1, characterized in that: the BT furnace is internally distributed with a balance air pipe which blows the glass in the BT furnace for balance heating; the balance gas pipes are stainless steel seamless pipes which are uniformly arranged in the front area of the BT furnace at equal intervals, and the stainless steel seamless pipes are arranged in parallel with the glass flowing direction.
5. The large spherical glass molding process according to claim 1, characterized in that: self-adaptation reducing roller forming assembly contains protruding roller (1) and concave roller (2), and the curved surface of protruding roller (1) and concave roller (2) matches, and the both ends of protruding roller (1) and concave roller (2) all set up on the platform that floats.
6. The large spherical glass molding process according to claim 5, characterized in that: the floating platform comprises a screw rod, a screw rod pair, a dovetail groove guide rail and a servo motor for driving the servo motor to move up and down.
7. The large spherical glass molding process according to claim 1, wherein in the step ③, the pre-bending of the tuyere is performed by intermittently blowing the glass on the roller table of the molding machine by the upper and lower air grids to assist in controlling the local curvature and the profile of the glass, and the intermittent blowing means blowing by a high frequency solenoid valve according to the position of the profile of the glass.
8. The large spherical glass molding process according to claim 1, characterized in that: the distance from the air outlet of the upper air grid to the surface of the glass is 4-5mm, and the distance from the air outlet of the lower air grid to the surface of the glass on the forming roller way is 3-4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911156688.1A CN110818234A (en) | 2019-11-22 | 2019-11-22 | Large spherical glass forming process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911156688.1A CN110818234A (en) | 2019-11-22 | 2019-11-22 | Large spherical glass forming process |
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| CN110818234A true CN110818234A (en) | 2020-02-21 |
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| CN201911156688.1A Pending CN110818234A (en) | 2019-11-22 | 2019-11-22 | Large spherical glass forming process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111704351A (en) * | 2020-07-13 | 2020-09-25 | 郑州福耀玻璃有限公司 | Car front bumper pressing forming process |
| CN111908805A (en) * | 2020-07-15 | 2020-11-10 | 信义光伏产业(安徽)控股有限公司 | Toughened glass and manufacturing method thereof |
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| JP2005179124A (en) * | 2003-12-19 | 2005-07-07 | Asahi Glass Co Ltd | Method and apparatus for bending glass plate |
| CN101987774A (en) * | 2009-07-30 | 2011-03-23 | 洛阳北方玻璃技术股份有限公司 | Device and method for molding and tempering hyperbolic glass |
| CN202400959U (en) * | 2011-12-31 | 2012-08-29 | 佛山市高明南亮玻璃制品有限公司 | Toughening furnace |
| CN204111580U (en) * | 2014-08-08 | 2015-01-21 | 福耀集团（上海）汽车玻璃有限公司 | Pre-bending device before a kind of toughened glass is shaping |
| CN204644122U (en) * | 2015-03-20 | 2015-09-16 | 苏州市灵通玻璃制品有限公司 | The curved steel rider of annealing furnace |
| CN109354389A (en) * | 2018-08-24 | 2019-02-19 | 合肥中科衡金工业自动化有限公司 | A kind of spherical glass processing technology |
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2019
- 2019-11-22 CN CN201911156688.1A patent/CN110818234A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004051404A (en) * | 2002-07-18 | 2004-02-19 | Asahi Glass Co Ltd | Bend-forming apparatus for glass plate |
| JP2005179124A (en) * | 2003-12-19 | 2005-07-07 | Asahi Glass Co Ltd | Method and apparatus for bending glass plate |
| CN101987774A (en) * | 2009-07-30 | 2011-03-23 | 洛阳北方玻璃技术股份有限公司 | Device and method for molding and tempering hyperbolic glass |
| CN202400959U (en) * | 2011-12-31 | 2012-08-29 | 佛山市高明南亮玻璃制品有限公司 | Toughening furnace |
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| CN204644122U (en) * | 2015-03-20 | 2015-09-16 | 苏州市灵通玻璃制品有限公司 | The curved steel rider of annealing furnace |
| CN109354389A (en) * | 2018-08-24 | 2019-02-19 | 合肥中科衡金工业自动化有限公司 | A kind of spherical glass processing technology |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111704351A (en) * | 2020-07-13 | 2020-09-25 | 郑州福耀玻璃有限公司 | Car front bumper pressing forming process |
| CN111704351B (en) * | 2020-07-13 | 2022-09-16 | 郑州福耀玻璃有限公司 | Car front bumper pressing forming process |
| CN111908805A (en) * | 2020-07-15 | 2020-11-10 | 信义光伏产业(安徽)控股有限公司 | Toughened glass and manufacturing method thereof |
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Application publication date: 20200221 |