A physical tempering system and method for large-size hemispherical glass

Abstract

The present invention relates to a physical tempering system and method for large-sized hemispherical glass, and belongs to the technical field of glass tempering. The system comprises a conveying device, a film carrier is provided on the moving part of the conveying device, and an upper film area, a preheating area, a heating area, a cooling area and a lower film area are sequentially provided on the conveying path of the film carrier; the preheating area is provided with a preheating device, and the preheating device is provided with heating components located on the upper and lower sides of the conveying path of the film carrier; the heating area is provided with a heating device, and the heating device is provided with a top lifting device and a bottom lifting device, the lifting end of the top lifting device is arranged downward and connected to the top hemispherical heating device, and the lifting end of the bottom lifting device is arranged upward and connected to the bottom hemispherical heating device. The method is applied to a physical tempering system to perform physical tempering on large-sized hemispherical glass. The present invention makes the surface stress of the tempered large-sized hemispherical glass uniformly distributed, and the tempering strength and the particle size after crushing meet the use requirements.

Description

Technical Field

[0001] The invention relates to the technical field of glass tempering, and in particular to a large-size hemispherical glass physical tempering system and a tempering method. Background Art

[0002] Large-sized hemispherical glass can be used as an observation window for the space station. The space station runs at high speed in space, and the hemispherical glass of the space station must be impact-resistant glass to ensure the safety of astronauts. Therefore, improving the mechanical properties of the glass through post-processing and strengthening treatment is an inevitable choice to improve the safety of hemispherical glass.

[0003] Physical tempering and chemical strengthening are common methods to improve the mechanical properties of glass. The macroscopic effect is to form a compressive stress layer on the surface of the glass. When the glass is subjected to external force, the stress layer can partially offset the tensile stress caused by the external force, thereby achieving the purpose of improving the strength of the glass. Chemical tempering, also known as ion exchange strengthening, can be used to temper ultra-thin glass with a thickness of less than 1 mm. Physical tempering is a method of heating the glass to above the transition temperature of the glass and then rapidly cooling it to improve the strength of the glass. Compared with physical strengthening technology, chemical strengthening technology takes a long time to process and has a long production cycle. It also breaks into flakes after being broken, which poses certain safety hazards. The thickness of the hemisphere glass of the space station is greater than 3 mm, so only physical tempering technology can be used.

[0004] For large-size hemispherical glass with a diameter greater than 1000mm, physical tempering has the following technical difficulties:

[0005] (a) When tempering large sizes, the glass will deform under the influence of its own weight, and the temperature inside and outside the ball is inconsistent, and the temperature uniformity cannot meet the requirements;

[0006] (b) When the wind grid cools the spherical glass, the wind pressure inside and outside and at different positions on the spherical surface is inconsistent, resulting in uneven stress distribution on the glass surface, the tempered strength does not meet the requirements, and the particle size after breaking does not meet the requirements. At present, domestic equipment manufacturers do not have a specific solution for the physical tempering of large-sized hemispherical glass. Summary of the invention

[0007] The purpose of the present invention is to provide a physical tempering system and method for large-sized hemispherical glass, so as to physically temper large-sized hemispherical glass and improve the glass tempering performance. The specific technical scheme is as follows:

[0008] A large-size hemispherical glass physical tempering system comprises a conveying device, a moving part of which is provided with a carrier device for loading the large-size hemispherical glass to be tempered, and an upper plate area, a preheating area, a heating area, a cooling area and a lower plate area are sequentially provided on the conveying path of the carrier device;

[0009] The preheating zone is provided with a preheating device, the preheating device is provided with upper and lower heating components, and the conveying path of the wafer carrier device is located between the upper and lower heating components;

[0010] The heating zone is provided with a heating device, in which a top lifting device and a bottom lifting device are provided. The lifting end of the top lifting device is arranged downward and connected to the top hemispherical heating device, and the lifting end of the bottom lifting device is arranged upward and connected to the bottom hemispherical heating device. The conveying path of the carrier device is located between the top and bottom hemispherical heating devices.

[0011] Furthermore, the heating component is a group of evenly distributed heating resistance wires.

[0012] Furthermore, the wafer carrier device includes a wafer carrier ring, and both ends of the wafer carrier ring are connected to the moving part of the conveying device through a connecting plate.

[0013] Furthermore, the top hemispherical heating device has a heating surface that matches the outer surface of the hemispherical glass, and the bottom hemispherical heating device has a heating surface that matches the inner surface of the hemispherical glass.

[0014] Furthermore, the top and bottom hemispherical heating devices are provided with heating resistance wires evenly distributed along the heating surfaces thereof.

[0015] The present application also provides a physical tempering method for large-size hemispherical glass, which is applied to the above-mentioned physical tempering system for large-size hemispherical glass. The method comprises the following steps:

[0016] Step a. Start the preheating device and the heating device and set the temperature respectively;

[0017] Step b. After the internal temperature of the preheating device and the heating device reaches the set stable state, the large-sized hemispherical glass to be tempered is placed on the slide device in the upper film area;

[0018] Step c. The slide carrier drives the large-sized hemispherical glass into the preheating zone, and the preheating device preheats it; wherein the preheating time is 5 minutes to 30 minutes, and the preheating temperature is 20-50°C lower than the softening point temperature of the large-sized hemispherical glass;

[0019] Step d. After the preheating is completed, the large-sized hemispherical glass enters the heating zone and is heated in the heating device: the top lifting device and the bottom lifting device are started, and the top hemispherical heating device and the bottom hemispherical heating device heat the outside and inside of the large-sized hemispherical glass respectively;

[0020] The top hemispherical heating device and the bottom hemispherical heating device are respectively kept at the same distance from the inner and outer surfaces of the large-sized hemispherical glass, the heating temperature is 50-100°C higher than the softening point of the large-sized hemispherical glass, and the heating time is 40-50 seconds per millimeter of glass tempering thickness;

[0021] Step e. After the heating is completed, the top lifting device and the bottom lifting device are started to control the top hemispherical heating device and the bottom hemispherical heating device to separate from the large-size hemispherical glass;

[0022] Step f. The large-sized hemispherical glass enters the cooling zone, and the wind pressure precision control system is started to temper the large-sized hemispherical glass with rapid air cooling;

[0023] The wind pressure precision control system includes a first wind pressure lifting device, on which a fan is provided, the fan is connected to a wind grid, a first air outlet device is connected to the wind grid, the first air outlet device is located on the upper side of the moving path of the film carrier device, and the first air outlet device is provided with air outlets of equal apertures evenly distributed along the outer surface of the hemisphere; when the first wind pressure lifting device is lowered, the first air outlet device can completely cover the outer surface of the large-sized hemispherical glass;

[0024] Step g. After the cooling is completed, the first wind pressure lifting device is controlled to rise, so that the first air outlet device is separated from the large-size hemispherical glass;

[0025] Step h. The large-sized hemispherical glass enters the lower plate area, and the tempered large-sized hemispherical glass is taken out from the lower plate area.

[0026] Furthermore, the wind pressure precision control system further comprises a second wind pressure lifting device, on which a fan is arranged, the fan is connected to a wind grid, a second air outlet device is connected to the wind grid, the second air outlet device is located at the lower side of the moving path of the film carrier device, and the second air outlet device is provided with air outlets of equal apertures evenly distributed along the outer surface of the hemisphere; when the second wind pressure lifting device is raised, the second air outlet device can completely cover the inner surface of the large-sized hemispherical glass;

[0027] In step g, after cooling is completed, the second wind pressure lifting device is controlled to descend so that the second air outlet device is separated from the large-sized hemispherical glass.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention provides a physical tempering system and method for large-sized hemispherical glass, wherein the system comprises an upper plate area, a preheating zone, a heating zone, a cooling zone and a lower plate area. The hemispherical glass can be physically tempered by the system, and the internal and external temperatures of the large-sized hemispherical glass are evenly distributed during the tempering heating process, and the wind pressures at different positions of the internal and external spherical surfaces of the large-sized hemispherical glass are consistent during the cooling process, and the surface stress of the large-sized hemispherical glass after tempering is evenly distributed, and the tempering strength and the particle size after breaking meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the structure of a large-size hemispherical glass physical tempering system according to an embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of a top view of the structure of a wafer carrier device in an embodiment of the present invention;

[0032] Figure 3 is a schematic side view of the structure of a wafer carrier device in an embodiment of the present invention;

[0033] Figure 4 is a schematic structural diagram of a preheating device in an embodiment of the present invention;

[0034] Figure 5 is a schematic structural diagram of a heating device in an embodiment of the present invention;

[0035] Figure 6 It is a structural schematic diagram of the wind pressure precision control system in an embodiment of the present invention.

[0036] Explanation of the accompanying drawings: 1. upper sheet area; 2. preheating area; 3. heating area; 4. cooling area; 5. lower sheet area; 6. conveying device; 7. wafer loading device; 8. large-size hemispherical glass; 9. preheating device; 10. heating assembly; 11. heating device; 12. top lifting device; 13. bottom lifting device; 14. top hemispherical heating device; 15. bottom hemispherical heating device; 16. wind pressure precision control system; 17. first wind pressure lifting device; 18. fan; 19. wind grid; 20. first air outlet device; 21. wafer loading ring; 22. connecting plate; 23. second wind pressure lifting device; 24. second air outlet device. DETAILED DESCRIPTION

[0037] To make the present invention more clear, a large-size hemispherical glass physical tempering system and tempering method of the present invention are further described below in conjunction with the accompanying drawings. The specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0038] like Figure 1As shown, a large-size hemispherical glass physical tempering system includes a conveying device 6, which has a moving part that can reciprocate along a straight line, and a film carrier 7 is fixedly connected to the moving part. On the conveying path of the film carrier 7, an upper film area 1, a preheating area 2, a heating area 3, a cooling area 4 and a lower film area 5 are arranged in sequence.

[0039] Combination Figure 2 , Figure 3 As shown, the film carrier 7 includes a film carrier ring 21, the upper surface of the film carrier ring 21 is used to support the large-sized hemispherical glass 8, so that the inner space of the large-sized hemispherical glass 8 can be completely connected to the outside. The two ends of the film carrier ring 21 are connected to the moving part of the conveying device 6 through connecting plates 22. Here, the conveying device can be a conventional chain conveyor belt structure. It has two parallel conveying chains, and the two connecting plates 22 are respectively connected to the chains on the corresponding sides.

[0040] Combination Figure 4 As shown, the preheating zone 2 is provided with a preheating device 9, which has a heat-insulating box body, with inlets and outlets on the left and right sides of the box body, and a heating assembly 10 distributed up and down is provided in the box body, and the conveying path of the wafer carrier 7 is located between the upper and lower heating assemblies 10. In this embodiment, the heating assembly 10 is preferably a group of uniformly distributed heating resistance wires, which provide preheating energy for the large-sized hemispherical glass 8.

[0041] Combination Figure 5 As shown, the heating zone 3 is provided with a heating device 11, which has a heat-insulating box body, with inlets and outlets on the left and right sides of the box body, and the box body is arranged to fit with the box body of the preheating device 9. A top lifting device 12 and a bottom lifting device 13 are arranged in the box body, the lifting end of the top lifting device 12 is arranged downward and connected to a top hemispherical heating device 14, and the lifting end of the bottom lifting device 13 is arranged upward and connected to a bottom hemispherical heating device 15, and the conveying path of the carrier device 7 is located between the top and bottom hemispherical heating devices. The top hemispherical heating device 14 has a heating surface that matches the shape of the outer surface of the hemispherical glass, and the bottom hemispherical heating device 15 has a heating surface that matches the shape of the inner surface of the hemispherical glass, so as to ensure that the heating surfaces can evenly heat the corresponding surfaces of the large-sized hemispherical glass 8. Preferably, the pair of heating surfaces use a group of uniformly distributed heating resistance wires as a heat supply source.

[0042] Here, the top and bottom lifting devices can preferably adopt screw lifters to improve the lifting and lowering adjustment accuracy.

[0043] Combination Figure 6As shown, the cooling zone 4 is provided with a wind pressure precision control system 16, which includes a box body, with inlets and outlets on the left and right sides of the box body, and the box body and the box body of the heating device 11 are arranged in close contact with each other. A first wind pressure lifting device 17 is arranged in the box body, and the first wind pressure lifting device 17 is lifted vertically, and is located on the upper side of the conveying path of the film carrier device 7. A fan 18 is arranged on the first wind pressure lifting device 17, and the air outlet of the fan 18 is connected to the wind grid 19, and the air outlet of the wind grid 19 is connected to the first air outlet device 20, and the first air outlet device 20 is provided with air outlets of equal apertures uniformly distributed along the outer surface of the hemispherical glass; when the first wind pressure lifting device 17 is lowered, the first air outlet device 20 can completely cover the outer surface of the large-sized hemispherical glass 8.

[0044] The wind pressure precision control system 16 also includes a second wind pressure lifting device 23, on which a fan 18 is provided, the fan 18 is connected to a wind grid 19, and the wind grid 19 is connected to a second air outlet device 24, the second air outlet device 24 is located at the lower side of the moving path of the film carrier device 7, and the second air outlet device 24 is provided with air outlets of equal apertures evenly distributed along the outer surface of the hemisphere; when the second wind pressure lifting device 23 rises, the second air outlet device 24 can completely cover the inner surface of the large-sized hemispherical glass 8.

[0045] The present application also provides a physical tempering method for large-size hemispherical glass, which is applied to the above-mentioned physical tempering system. The method specifically comprises the following steps:

[0046] Step a. Start the preheating device 9 to set the heating temperature of the heating component 10; start the heating device 11 to set the heating temperature of the top hemispherical heating device 14 and the bottom hemispherical heating device 15.

[0047] Step b. After the temperature in the preheating device 9 and the heating device 11 reaches the set value and stabilizes, the large-sized hemispherical glass 8 to be tempered is placed on the slide device 7 in the upper area 1 to ensure that the inner hole of the slide ring 21 is aligned with the internal space of the large-sized hemispherical glass 8.

[0048] Step c. The conveying device 6 is in operation, so that the carrier device 7 drives the large-sized hemispherical glass 8 into the preheating zone 2. After reaching the appropriate position, the conveying device 6 stops running, and the preheating device 9 preheats it; wherein, the preheating time is 5 minutes to 30 minutes, and the preheating temperature is 20-50°C lower than the softening point temperature of the large-sized hemispherical glass.

[0049] Step d. After the preheating is completed, the conveying device 6 continues to work, and the slide device 7 drives the large-sized hemispherical glass 8 into the heating zone 3. After reaching the appropriate position, the conveying device 6 stops running, and the heating device 11 heats it: the top lifting device 12 and the bottom lifting device 13 are started, and the top hemispherical heating device 14 and the bottom hemispherical heating device 15 heat the outside and inside of the large-sized hemispherical glass 8 respectively;

[0050] Among them, the top hemispherical heating device 14 and the bottom hemispherical heating device 15 respectively maintain the same distance from the inner and outer surfaces of the large-sized hemispherical glass, the heating temperature is 50-100°C higher than the softening point temperature of the large-sized hemispherical glass, and the heating time is 40-50 seconds per millimeter of glass tempering thickness.

[0051] Step e. After the heating is completed, the top lifting device 12 and the bottom lifting device 13 are started to control the top hemispherical heating device 14 and the bottom hemispherical heating device 15 to separate from the large-sized hemispherical glass 8 until they do not interfere with the movement of the large-sized hemispherical glass 8.

[0052] Step f. The conveying device 6 continues to work, and the film loading device 7 drives the large-sized hemispherical glass 8 into the cooling zone 4. After reaching the appropriate position, the conveying device 6 stops running. The wind pressure precision control system 16 is started, and the first wind pressure lifting device 17 is lowered until the first air outlet device 20 completely covers the outer surface of the large-sized hemispherical glass 8, and the second wind pressure lifting device 23 is lowered until the second air outlet device 24 completely covers the inner surface of the large-sized hemispherical glass 8. The fan 18 works to quickly cool the large-sized hemispherical glass 8 through tempering.

[0053] Step g. After cooling is completed, the first wind pressure lifting device 17 is controlled to rise and the second wind pressure lifting device 23 is controlled to fall, so that the first and second air outlet devices are completely separated from the large-sized hemispherical glass 8 until they do not interfere with the movement of the large-sized hemispherical glass 8.

[0054] Step h. The conveying device 6 continues to operate, and the carrier device 7 drives the large-sized hemispherical glass 8 into the lower plate area 5 and stops; the tempered large-sized hemispherical glass 8 is taken out from the lower plate area 5, and the physical tempering of the large-sized hemispherical glass is completed.

[0055] The tempered large-size hemispherical glass obtained by this method was subjected to relevant performance tests, and the relevant test parameters were shown in the following table:

[0056] In the table, the average surface stress value is the average value measured at 10 different positions, and the difference between the maximum stress and the minimum stress is the difference between the maximum value and the minimum value at 10 different positions.

[0057] It can be seen from the above table that the surface stress of the large-sized hemispherical glass after tempering is evenly distributed, the tempering strength performance is improved, and the particle size after breaking meets the use requirements.

[0058] The above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A physical tempering system for large-size hemispherical glass, the diameter of which is greater than 1000 mm, characterized in that: It comprises a conveying device (6), a moving part of which is provided with a carrier device (7) for loading large-sized hemispherical glass (8) to be tempered, and an upper plate area (1), a preheating area (2), a heating area (3), a cooling area (4) and a lower plate area (5) are sequentially provided on the conveying path of the carrier device (7); The preheating zone (2) is provided with a preheating device (9), the preheating device (9) is provided with heating components (10) distributed up and down, and the conveying path of the wafer carrier device (7) is located between the upper and lower heating components (10); The heating zone (3) is provided with a heating device (11), the heating device (11) is provided with a top lifting device (12) and a bottom lifting device (13), the lifting end of the top lifting device (12) is arranged downward and is connected to a top hemispherical heating device (14), the lifting end of the bottom lifting device (13) is arranged upward and is connected to a bottom hemispherical heating device (15), and the conveying path of the wafer carrier device (7) is located between the top and bottom hemispherical heating devices; The top hemispherical heating device (14) has a heating surface that matches the outer surface of the hemispherical glass, and the bottom hemispherical heating device (15) has a heating surface that matches the inner surface of the hemispherical glass; The top and bottom hemispherical heating devices are provided with heating resistance wires evenly distributed along the heating surfaces thereof.

2. A large-size hemispherical glass physical tempering system according to claim 1, characterized in that: The heating component (10) is a group of evenly distributed heating resistance wires.

3. The large-size hemispherical glass physical tempering system according to claim 1, characterized in that: The wafer carrier device (7) comprises a wafer carrier ring (21), and two ends of the wafer carrier ring (21) are connected to the moving part of the conveying device (6) via connecting plates (22).

4. A physical tempering method for large-size hemispherical glass, applied to a physical tempering system for large-size hemispherical glass according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: Step a. Start the preheating device (9) and the heating device (11) and set the temperature respectively; Step b. After the internal temperature of the preheating device (9) and the heating device (11) reaches a set stable state, the large-sized hemispherical glass (8) to be tempered is placed on the carrier device (7) in the upper plate area (1); Step c. The carrier device (7) drives the large-sized hemispherical glass (8) into the preheating zone (2), and the preheating device (9) preheats it; wherein the preheating time is 5 minutes to 30 minutes, and the preheating temperature is 20 to 50° C. lower than the softening point of the large-sized hemispherical glass; Step d. After the preheating is completed, the large-sized hemispherical glass (8) enters the heating zone (3), and the heating device (11) heats it: the top lifting device (12) and the bottom lifting device (13) are started, and the top hemispherical heating device (14) and the bottom hemispherical heating device (15) respectively heat the outside and inside of the large-sized hemispherical glass (8); The top hemispherical heating device (14) and the bottom hemispherical heating device (15) are respectively kept at the same distance from the inner and outer surfaces of the large-sized hemispherical glass, the heating temperature is 50-100° C. higher than the softening point of the large-sized hemispherical glass, and the heating time is 40-50 seconds per millimeter of glass thickness for tempering. Step e. After the heating is completed, the top lifting device (12) and the bottom lifting device (13) are started to control the top hemispherical heating device (14) and the bottom hemispherical heating device (15) to separate from the large-sized hemispherical glass (8); Step f. The large-sized hemispherical glass (8) enters the cooling zone (4), and the wind pressure precision control system (16) is started to temper the large-sized hemispherical glass (8) with rapid wind cooling; The wind pressure precision control system (16) comprises a first wind pressure lifting device (17), a fan (18) is provided on the first wind pressure lifting device (17), the fan (18) is connected to a wind grid (19), a first air outlet device (20) is connected to the wind grid (19), the first air outlet device (20) is located on the upper side of the moving path of the film carrier device (7), and the first air outlet device (20) is provided with air outlets of equal apertures evenly distributed along the outer surface of the hemisphere; when the first wind pressure lifting device (17) is lowered, the first air outlet device (20) can completely cover the outer surface of the large-sized hemispherical glass (8); Step g. After the cooling is completed, the first wind pressure lifting device (17) is controlled to rise, so that the first air outlet device (20) is separated from the large-sized hemispherical glass (8); Step h. The large-sized hemispherical glass (8) enters the lower plate area (5), and the tempered large-sized hemispherical glass (8) is taken out from the lower plate area (5).

5. The physical tempering method of large-size hemispherical glass according to claim 4, characterized in that: The wind pressure precision control system (16) further comprises a second wind pressure lifting device (23), the second wind pressure lifting device (23) being provided with a fan (18), the fan (18) being connected to a wind grille (19), the wind grille (19) being connected with a second air outlet device (24), the second air outlet device (24) being located at the lower side of the moving path of the film carrier device (7), the second air outlet device (24) being provided with air outlets of equal apertures evenly distributed along the outer surface of the hemisphere; when the second wind pressure lifting device (23) is raised, the second air outlet device (24) can completely cover the inner surface of the large-sized hemispherical glass (8); In step g, after cooling is completed, the second wind pressure lifting device (23) is controlled to descend, so that the second air outlet device (24) is separated from the large-sized hemispherical glass (8).

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