CN114751633A - Hot bending forming device and forming method for large-size ultrathin glass component - Google Patents
Hot bending forming device and forming method for large-size ultrathin glass component Download PDFInfo
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- CN114751633A CN114751633A CN202210487604.8A CN202210487604A CN114751633A CN 114751633 A CN114751633 A CN 114751633A CN 202210487604 A CN202210487604 A CN 202210487604A CN 114751633 A CN114751633 A CN 114751633A
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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
- C03B23/0066—Re-forming shaped glass by bending
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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
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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Abstract
The invention relates to the technical field of glass hot bending processing, in particular to a large-size ultrathin glass component hot bending forming device and a forming method thereof, wherein the forming device comprises a regulating and controlling unit, a furnace chamber, a die body, a supporting component, a load unit, a driving unit, a first heating component and a second heating component, the temperature of the first heating component is controlled to realize coarse adjustment, the laser regulation and control of the second heating component are combined to quickly realize heating fine adjustment, the energy is efficiently and accurately gathered to a region needing to be formed, and the forming macroscopic performance and controllability of ultrathin glass are quickly improved; according to the forming method, after the glass material blank is preliminarily heated and reaches the temperature close to the softening point, the upper quartz mold and the lower quartz mold are closed, the laser light path of the closed environment can be achieved by adopting the mold body, the ultrathin glass component can be directly focused to heat up by virtue of the high-controllability, non-contact, high-efficiency and accurate thermal state accumulation effect, the macroscopic performance and controllability of the ultrathin glass forming are improved, and the forming effect is good.
Description
Technical Field
The invention relates to the technical field of glass hot bending processing, in particular to a large-size ultrathin glass component hot bending forming device and a forming method thereof.
Background
The manufacture of high-performance display screens is one of the bottlenecks which restrict the development of the electronic information industry in China. The large-size curved surface ultrathin glass component has good market prospect in the field of vehicle-mounted display screens. However, as the vehicle-mounted display device is developed towards light weight, large screen, curved surface and high definition, the problem of neck jamming in the whole high-end display industry becomes more and more prominent. The high-performance display glass component has the characteristics of ultra-thinness, precision, high quality and the like, and requires a special-shaped surface with high appearance precision and no surface defect and high consistency (high light transmittance and refractive index) so as to meet the requirement of high-performance display, and the manufacturing difficulty of the large-size complex curved surface ultra-thin glass component is obviously improved.
For example, patent application with publication number "CN 109205999A" discloses an efficient processing method for 3D curved cover plate glass, and the processing technology of curved glass mainly has the following problems: (1) the mold and the glass blank are directly heated only by adopting the U-shaped heating pipe as a source, so that the problems of weak controllability, large temperature gradient in the blank and the like exist; (2) the mold closing time of the mold is too early, and the ultra-thin glass blank is not softened in time, so that the ultra-thin glass is very easy to break due to the weight of the mold. In addition, the traditional process is adopted to carry out the hot-press forming of the ultrathin glass, the surface defects such as crystallization, holes, cracks and the like are easy to occur, the main reason is that the ultrathin glass has great difference with the common glass in the aspects of size span (the length-thickness ratio is over 2000: 1), shape complexity (space special-shaped curved surface), temperature sensitivity (0.5 ℃), stress tolerance (0.5Pa) and the like, and the traditional hot-press process can only carry out rapid integral non-uniform heating and can not realize uniform heating and pressurization with high local resolution, so that the phenomena of large temperature gradient, non-uniform stress distribution, severe glass state rheology and the like exist in the hot-press process, and the hot-press forming surface quality is directly influenced. Larger form and position errors (such as flatness, curvature radius and the like) can occur, and because the traditional hot-pressing temperature-pressure-position regulation strategy is slow in response, low in precision and weak in robustness, complex parameters such as temperature, pressure, displacement and the like in the hot-pressing process of the ultrathin glass with a remarkable size effect are difficult to accurately regulate, so that the rebound of the curved ultrathin glass is easily caused, and the form and position precision of hot-pressing forming cannot be guaranteed. Therefore, the traditional hot-press forming process and the regulation and control mode for common glass are not suitable for ultrathin glass, and the manufacturing requirements of high-performance large-size special-shaped curved surface ultrathin glass on low defect and high form and position precision cannot be met.
In view of the above, there is a need for a new apparatus and method for hot bending and forming large-sized ultra-thin glass members to better solve the above-mentioned problems.
Disclosure of Invention
In order to solve the problems, the invention provides a large-size ultrathin glass member hot bending forming device and a forming method thereof, which can better perform large-size ultrathin glass member hot bending forming processing, have high forming precision and high pass rate and meet the quality requirement of the forming process of the large-size ultrathin glass member.
The technical scheme adopted by the invention is as follows:
a large-size ultrathin glass component hot bending forming device comprises a regulating and controlling unit, a furnace chamber, a die body, a supporting assembly, a loading unit, a driving unit, a first heating assembly and a second heating assembly, wherein the supporting assembly, the loading unit, the driving unit, the first heating assembly and the second heating assembly are respectively connected with the regulating and controlling unit;
the mold body comprises an upper quartz mold and a lower quartz mold which can be connected in a mold closing manner, the upper quartz mold and the lower quartz mold are respectively arranged in the furnace cavity, and when the upper quartz mold and the lower quartz mold are connected in a mold closing manner, a forming cavity is formed in a surrounding manner;
the supporting assembly is arranged on the lower quartz mould and connected with the upper quartz mould;
the driving unit is connected with the load unit, and the load unit is connected with the quartz lower die;
the first heating assembly is arranged above the upper quartz mould and is heated by adopting a laser light source;
the second heating assembly is arranged in the quartz lower die.
In some embodiments, the light transmittance of the mold body is greater than 94%.
In some embodiments, the supporting component is provided with a plurality of supporting rods capable of automatically lifting, and the upper quartz mould is provided with a plurality of grooves matched with the supporting rods.
In some embodiments, the first heating assembly is provided with a laser and a reflector, and a light source emitted by the laser is emitted into the die body after the light path of the light source is adjusted by the reflector.
In some embodiments, the first heating assembly further comprises a doubling mirror, and the reflector adjusts the light source after the light path, and the light source is injected into the mold body after the energy is enhanced by the doubling mirror.
In some embodiments, the laser is an ultra-short pulse laser whose light source employs a 1035nm infrared pulse laser.
In some embodiments, the second heating assembly is provided as a heating tube.
Based on the same inventive concept, the application also provides a hot bending forming method of the large-size ultrathin glass component, which comprises the following steps:
s1, determining shape characteristics, and modeling heating path characteristics according to the size characteristics of the ultrathin glass blank to be subjected to hot bending forming;
s2, loading a mold and a sample, putting an ultrathin glass blank into the molding cavity and on the lower quartz mold, and separating the upper quartz mold from the lower quartz mold at intervals through a supporting assembly;
s3, preheating, namely heating the die body and the ultrathin glass blank through a second heating assembly to heat the ultrathin glass blank to 2/3 which is close to the softening point temperature of the glass;
s4, carrying out laser accurate regulation and control, closing the quartz upper die and the quartz lower die to form a closed processing environment, and accurately heating through a second heating assembly according to a preset heating path to realize controllable forming of the ultrathin glass;
s5, primarily selecting and trial processing parameters, preprocessing the ultra-thin glass blank, and adjusting process parameters;
and S6, batch processing production.
In some embodiments, in step S4, the laser source is shaped by the first heating assembly in a space-time manner, so as to perform precise heating, thereby achieving controllability of forming the ultra-thin glass.
In some embodiments, the process parameters in step S5 include laser parameters, initial heating temperature, die pressure, and holding time.
The invention has the following beneficial effects:
1. the forming device comprises a regulation and control unit, a furnace chamber, a die body, a supporting component, a load unit, a driving unit, a first heating component and a second heating component, wherein the supporting component, the load unit, the driving unit, the first heating component and the second heating component are respectively connected with the regulation and control unit, the structure is simple, the design is reasonable, the supporting component is arranged, the ultra-thin glass can be prevented from being broken due to the weight of the die when the forming temperature does not reach the vicinity of a softening point, the 'coarse adjustment' is realized by controlling the temperature of the die through the first heating component, the 'fine adjustment' is quickly realized by combining with laser regulation and control, the laser thermal forming regulation and control can directly focus on the ultra-thin glass component to heat up by virtue of strong advantages of high controllability, non-contact, high-efficiency and accurate thermal state accumulation effect and the like, the whole non-uniform heating is realized, the energy is efficiently and accurately gathered to a region to be formed in a laser non-contact mode by locally accurate and high-resolution uniform heating and pressurization, and the arrangement structure and physical property parameters of glass molecules can be regulated and controlled in a space-time shaping mode, so that the macroscopic performance and controllability of ultra-thin glass forming are rapidly improved, and the forming effect is effectively ensured;
2. the forming method provided by the application separates the upper quartz mould from the lower quartz mould through the supporting component, the upper and lower dies are closed when the glass material blank is preliminarily heated to reach the temperature near the softening point, the laser light path of the closed environment can be achieved by adopting the die body, the ultrathin glass component can be directly focused to heat up by virtue of the high controllability, non-contact, high-efficiency and accurate thermal state accumulation effect, the integral non-uniform heating and the uniform heating and pressurization with local accurate high resolution are realized, the glass molecular arrangement structure and physical property parameters thereof are regulated and controlled in a laser space-time shaping mode, the macroscopic performance and controllability of ultra-thin glass forming are improved, the heating efficiency and temperature control precision of the ultra-thin glass component hot bending forming are greatly improved, and the surface defects such as crystallization, holes, cracks and the like caused by temperature gradient generated by uneven heat transfer of a die are improved; in addition, the laser composite hot bending forming reduces the high-temperature heating of the original closed cavity, reduces the energy consumption and saves the production cost.
Drawings
FIG. 1 is an exploded view of a mold body, support assembly and glass blank in accordance with certain embodiments of the invention;
FIG. 2 is a schematic illustration of the structure of an upper quartz mold in accordance with certain embodiments of the present invention;
FIG. 3 is a schematic view of the connection structure of the lower quartz mold and the support assembly in some embodiments of the present invention;
FIG. 4 is a schematic structural view of a molding apparatus according to some embodiments of the present invention;
FIG. 5 is a schematic block flow diagram of a molding process in some embodiments of the invention;
description of reference numerals: 1. the device comprises a furnace chamber, 2 parts of a die body, 21 parts of a quartz upper die, 211 parts of a groove, 22 parts of a quartz lower die, 23 parts of a forming cavity, 3 parts of a supporting component, 4 parts of a loading unit, 5 parts of a driving unit, 6 parts of a first heating component, 61 parts of a laser, 611 parts of a laser light path, 62 parts of a reflector, 63 parts of a multiplying mirror, 7 parts of a second heating component and 8 parts of a glass blank.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 4, the large-sized ultra-thin glass member hot bending apparatus according to this embodiment includes a regulating unit (not shown in the drawings), a furnace chamber 1, a mold body 2, a supporting assembly 3, a loading unit 4, a driving unit 5, a first heating assembly 6, and a second heating assembly 7, wherein the supporting assembly 3, the loading unit 4, the driving unit 5, the first heating assembly 6, and the second heating assembly 7 are respectively connected to the regulating unit;
the mold body 2 comprises an upper quartz mold 21 and a lower quartz mold 22 which can be connected in a matched mode, the upper quartz mold 21 and the lower quartz mold 22 are respectively arranged in the furnace chamber 1, and a forming cavity 23 is formed by enclosing the upper quartz mold 21 and the lower quartz mold 22 when the upper quartz mold 21 and the lower quartz mold 22 are connected in a matched mode;
the supporting component 3 is arranged on the quartz lower die 22 and connected with the quartz upper die 21;
the driving unit 5 is connected with the load unit 4, and the load unit is connected with the quartz lower die 22;
the first heating component 5 is arranged above the upper quartz mould 21, and the first heating component 5 is heated by adopting a laser light source;
the second heating assembly 5 is arranged in the quartz lower die 22.
The forming device that this embodiment provided, add man-hour, can support upper and lower mould through supporting component 3 and separate, avoid when 8 forming temperature of glass stock do not reach near the softening point yet, lead to ultra-thin glass breakage because of mould weight, and control temperature "coarse tuning" through second heating element 7 accuse temperature, combine first heating element 6 to carry out laser regulation and control, realize "fine tuning" heating fast, thereby pass through the mode of laser non-contact, it is high-efficient, accurate gather the energy to the region that needs the shaping, and can also regulate and control glass molecule arrangement structure and physical property parameter through the mode of space-time plastic, promote ultra-thin glass shaping macroscopic performance and controllability fast, effectively ensure the shaping effect.
Example 2
In this embodiment, specifically, the upper quartz mold 21 and the lower quartz mold 22 are transparent molds with a light transmittance greater than 94%, so as to facilitate the penetration of the laser light source for precise temperature control, and have a simple structure and good temperature controllability.
Example 3
In this embodiment, supporting component 3 is equipped with the bracing piece that a plurality of can rise automatically, mould 21 matches on the quartzy the bracing piece is equipped with a plurality of recesses 211, specifically, can set up to automatic flexible bracing piece, also can set up to driving piece and branch one-to-one mode, carries out the lift drive, adds man-hour, can stretch into in the recess 211 through the bracing piece to go up and down through the bracing piece, realize on the quartzy mould 21 with the quartzy separation or the connection of last mould 22.
Example 4
In this embodiment, the first heating assembly 6 is provided with a laser 61 and a reflector 62, a light source emitted by the laser 61 is incident to the die body 1 after a light path is adjusted by the reflector 62, and the incident light path of the laser light source can be adjusted by the cooperation of the laser 61 and the reflector 62, so that accurate heating control is performed.
Example 5
On the basis of the above embodiment, in this embodiment, the first heating element 6 is further provided with a doubling mirror 63, the reflector 62 adjusts the light source behind the light path, the energy is enhanced by the doubling mirror 63, and then the light source enters the mold body 1, and by additionally arranging the doubling mirror 63, the laser energy can be effectively enhanced, so that the heating effect is ensured.
Specifically, the laser 61 is an ultra-short pulse laser whose light source uses 1035nm infrared pulse laser.
Example 6
In this embodiment, the size of the cavity on the surface of the upper quartz mold 21 is the same as that of the upper surface of the large-sized ultra-thin glass member, the size of the cavity on the surface of the lower quartz mold 22 is the same as that of the lower surface of the large-sized ultra-thin glass member, and the upper quartz mold 21 and the lower quartz mold 22 are set to be transparent molds with a softening point temperature of 1780 ℃, a compressive strength of 690Mpa, and a light transmittance of more than 94%.
Specifically, referring to fig. 1 to 3, the support assembly 3 is provided with six support rods, and six grooves 211 are correspondingly formed on the upper quartz mold 21, and the six support rods are arranged two by two symmetrically with respect to the cross section of the upper quartz mold 21 in the length direction; the supporting rods are respectively coordinated and controlled by six driving motors to realize vertical lifting, ultra-thin glass breakage caused by the weight of a mold is avoided, the ultra-short pulse laser is arranged above the upper quartz mold 21, the laser 61 is an ultra-short pulse laser and is horizontally arranged, a light source is 1035nm infrared pulse laser, the ultra-short pulse laser emits laser in the horizontal direction, a laser light path 611 is reflected by a reflector 62 and then vertically downwards emits to the closed molding cavity 23, the laser light path 611 reaches the maximum energy after passing through a multiplying mirror 63 and directly irradiates the ultra-thin glass blank 8 through the upper quartz mold 21, a specific area of the ultra-short pulse laser is heated, and after the heating temperature reaches the hot bending temperature, the driving unit 5 drives the load unit 4 to drive the lower quartz mold 22 to move upwards to complete mold closing with the upper quartz mold 21.
In the embodiment, after the glass blank 8 is preliminarily heated, the laser light path 611 of a closed environment can be achieved by adopting the mold body 2, the ultrathin glass component can be directly focused to heat up by virtue of the high laser controllability, non-contact type, high-efficiency and accurate thermal state accumulation effect, the integral non-uniform heating is realized, the local accurate and high-resolution uniform heating and pressurization are realized, the glass molecule arrangement structure and the physical property parameters thereof are regulated and controlled in a laser space-time shaping mode, the macroscopic performance and controllability of the ultrathin glass forming are improved, the heating efficiency and temperature control accuracy of the hot bending forming of the ultrathin glass component are greatly improved, and the surface defects such as crystallization, holes, cracks and the like caused by the temperature gradient generated by the non-uniform heat transfer of the mold are improved; in addition, the laser composite hot bending molding reduces the high-temperature heating of the original closed cavity, reduces the energy consumption and saves the production cost.
The method for hot bending and forming the large-size ultrathin glass comprises the following steps:
s1, determining shape characteristics, and modeling heating path characteristics, namely modeling scanning path characteristics of a laser light source according to the size characteristics of the ultrathin glass blank 8 to be subjected to hot bending forming;
s2, loading a mold and a sample, placing an ultrathin glass blank 8 into the molding cavity 23 and on the lower quartz mold 22, and enabling the upper quartz mold 21 and the lower quartz mold 22 to be separated at intervals through the supporting assembly 3;
s3, preheating, namely heating the mould body 2 and the ultra-thin glass blank 8 through the second heating assembly 7 to heat the ultra-thin glass blank 8 to 2/3 which is close to the softening point temperature of the glass;
s4, carrying out laser precise regulation and control, closing the quartz upper die 21 and the quartz lower die 22 to form a closed processing environment, and carrying out precise heating in a laser light source space-time shaping mode through the first heating assembly 6 according to a preset heating path so as to realize controllability of ultra-thin glass forming;
s6, primarily selecting and trial processing parameters, preprocessing the ultra-thin glass blank 8, and adjusting and optimizing the technological parameters, wherein the technological parameters comprise laser parameters, initial heating temperature, mold pressure and holding time;
and S6, batch processing production.
Specifically, the pressing force is controlled by driving the loading unit 4 through the driving unit 5 to apply pressure to the quartz lower die 22.
The forming method has the advantages that the steps are simple, the processing is simple and convenient, in the forming process, the laser light path of a closed environment can be achieved by the aid of the die body 2, coarse adjustment is achieved by controlling the temperature of the heating pipe, fine adjustment is achieved by combining with laser regulation, integral non-uniform heating is achieved by laser thermoforming regulation, uniform heating and pressurization with local precise high resolution are achieved, namely, energy is efficiently and precisely gathered to an area needing forming in a laser non-contact mode, the arrangement structure and physical property parameters of glass molecules can be regulated and controlled in a space-time shaping mode, the macroscopic performance and controllability of ultra-thin glass forming are improved, the forming precision of a large-size ultra-thin glass hot bending forming component is high, and the forming stability is good.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The hot bending forming device for the large-size ultrathin glass component is characterized by comprising a regulating and controlling unit, a furnace chamber, a die body, a supporting assembly, a loading unit, a driving unit, a first heating assembly and a second heating assembly, wherein the supporting assembly, the loading unit, the driving unit, the first heating assembly and the second heating assembly are respectively connected with the regulating and controlling unit;
the mold body comprises an upper quartz mold and a lower quartz mold which can be connected in a mold closing manner, the upper quartz mold and the lower quartz mold are respectively arranged in the furnace cavity, and when the upper quartz mold and the lower quartz mold are connected in a mold closing manner, a forming cavity is formed in a surrounding manner;
the supporting assembly is arranged on the lower quartz mould and connected with the upper quartz mould;
the driving unit is connected with the load unit, and the load unit is connected with the quartz lower die;
the first heating assembly is arranged above the upper quartz mould and is heated by adopting a laser light source;
the second heating assembly is arranged in the quartz lower die.
2. The apparatus according to claim 1, wherein the light transmittances of the upper and lower quartz molds are greater than 94%.
3. The apparatus according to claim 1, wherein the support assembly comprises a plurality of support rods capable of automatically moving up and down, and the upper quartz mold comprises a plurality of grooves matching with the support rods.
4. The apparatus of claim 1, wherein the first heating assembly comprises a laser and a reflector, and a light source emitted from the laser is directed into the mold body after a light path is adjusted by the reflector.
5. The apparatus according to claim 4, wherein the first heating element further comprises a multiplying mirror, and the reflector adjusts a light source of the light path, and the light source is injected into the mold body after the energy is enhanced by the multiplying mirror.
6. The apparatus according to claim 4, wherein the laser is an ultra-short pulse laser.
7. The apparatus according to claim 4, wherein a 1035nm infrared pulse laser is used as a light source of the laser.
8. A hot bending forming method for a large-size ultrathin glass component is characterized by comprising the following steps:
s1, determining shape characteristics, and modeling the heating path characteristics according to the size characteristics of the ultrathin glass blank to be hot-bent;
s2, loading a die and a sample, putting an ultrathin glass blank into the forming cavity, and separating the upper quartz die from the lower quartz die at intervals through a supporting assembly;
s3, preheating, namely heating by a second heating assembly to heat the ultrathin glass blank to 2/3 which is close to the softening point temperature of the glass;
s4, carrying out laser accurate regulation and control, closing the upper quartz mould and the lower quartz mould to form a closed processing environment, and accurately heating through a second heating assembly according to a preset heating path to realize controllable forming of the ultrathin glass;
s5, primarily selecting and trial processing parameters, preprocessing the ultra-thin glass blank, and adjusting process parameters;
and S6, batch processing production.
9. The method for forming a large-sized ultra-thin glass member by hot bending according to claim 8, wherein in step S4, the first heating assembly is used to perform laser source temporal-spatial shaping to perform precise heating so as to realize controllability of ultra-thin glass forming.
10. The method for hot roll forming of large-sized ultra-thin glass members as claimed in claim 8, wherein the process parameters in step S5 include laser parameters, initial heating temperature, mold pressure and holding time.
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| CN202210487604.8A CN114751633B (en) | 2022-05-06 | 2022-05-06 | Hot bending forming device and forming method for large-size ultrathin glass member |
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