CN111268895A - Glass hot bending device and method based on laser shaping and orientation assistance - Google Patents
Glass hot bending device and method based on laser shaping and orientation assistance Download PDFInfo
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- CN111268895A CN111268895A CN202010091406.0A CN202010091406A CN111268895A CN 111268895 A CN111268895 A CN 111268895A CN 202010091406 A CN202010091406 A CN 202010091406A CN 111268895 A CN111268895 A CN 111268895A
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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
- C03B23/0305—Press-bending accelerated by applying mechanical forces, e.g. inertia, weights or local forces
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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
Abstract
A glass hot bending device and method based on laser shaping and orientation assistance comprises a furnace chamber arranged on a rack, a movable bearing platform is arranged in the furnace chamber, a mold is arranged on the movable bearing platform, and CO positioned on one side of the movable bearing platform is arranged in the furnace chamber2The device comprises a laser and a light path conversion mechanism, wherein a rotating shaft is arranged on one side of a movable bearing platform, a CCD visual positioning assembly and a pressing mechanism which are positioned above a die are respectively arranged on the rotating shaft, a temperature detection assembly is arranged in a furnace chamber, a heater is arranged in the die, the heater extends out of a rack through a lead and is connected with a rectifier, and the rotating shaft is connected with a rotary driver outside the rack; CO 22The laser light emitted by the laser is transmitted to the CCD visual positioning component after the direction is converted by the light path conversion mechanism and then is guided to the die. According to the invention, laser is applied to the field of glass hot bending, and a high-precision positioning system is combined, so that the position precision and yield of glass hot bending are greatly improved, the energy consumption is saved, and the curved glass with excellent three-dimensional characteristic appearance is obtained.
Description
Technical Field
The invention relates to a glass hot bending device, in particular to a glass hot bending device and method based on laser shaping and orientation assistance.
Background
With the development of fingerprint identification and face identification technologies, glass is more and more widely applied to the manufacturing fields of automobile panels, mobile phone panels and the like. For visual aesthetics, as well as to improve handling comfort, large manufacturers are now beginning to hot bend original flat glass into curved glass.
The traditional glass hot bending technology is generally realized by four working procedures of heating softening, pressure forming, pressure maintaining and gradual temperature reduction, but the existing preparation process has the following defects: (1) the mould technology can not be accurately positioned and controlled, so that the hot bending precision of the glass is not high, and when the mould is pressurized, large stress can be generated at the hot bending part, cracks and air holes are easy to cause; (2) the heat is conducted to the glass by heating the die, the heat conduction is indirect conduction, the heat does not directly act on the glass, the temperature of the lower die is detected by the temperature sensor instead of directly detecting the temperature of the surface of the glass, the temperature of the glass cannot be accurately controlled, and the heating efficiency is low.
Disclosure of Invention
The invention aims to provide a glass hot bending device and method based on laser shaping and orientation assistance.
In order to solve the technical problems, the invention adopts the following technical scheme:
a glass hot bending device based on laser shaping and directional assistance comprises a furnace chamber arranged on a frame, wherein a movable bearing platform is arranged in the furnace chamber, a mold is arranged on the movable bearing platform, and CO positioned on one side of the movable bearing platform is arranged in the furnace chamber2The device comprises a laser and a light path conversion mechanism, wherein a rotating shaft is arranged on one side of a movable bearing platform, a CCD visual positioning assembly and a pressing mechanism which are positioned above a die are respectively arranged on the rotating shaft, a temperature detection assembly is arranged in a furnace chamber, a heater is arranged in the die, the heater extends out of a rack through a lead and is connected with a rectifier, and the rotating shaft is connected with a rotary driver outside the rack; CO 22The laser light emitted by the laser is transmitted to the CCD visual positioning component after the direction is converted by the light path conversion mechanism and then is guided to the die.
The rotating shaft is movably arranged on the support, two fastening support rods are arranged on the rotating shaft, the CCD visual positioning assembly is arranged on one of the fastening support rods, and the pressing mechanism is arranged on the other fastening support rod.
Two fastening support rods are arranged on the rotating shaft in an angle of 90 degrees, and the CCD visual positioning assembly is a high-definition camera.
The temperature detection assembly comprises an infrared imager, an angle-adjustable support is arranged on the side wall of the furnace cavity, and the infrared imager is arranged on the angle-adjustable support.
The light path conversion mechanism comprises a reflector support, a first reflector, a second reflector and a third reflector, a reflector guide rail is arranged on the reflector support, the first reflector is arranged on the lower portion of the reflector guide rail at 45 degrees, the second reflector is arranged on the upper portion of the reflector guide rail at 45 degrees and is just opposite to the first reflector in arrangement, and the second reflector is arranged on the upper portion of the reflector guide rail at 45 degreesThe three reflectors and the CD visual positioning component are arranged on the same fastening support rod on the rotating shaft at an angle of 45 degrees, and CO is distributed2The laser light emitted by the laser sequentially passes through the first reflector, the second reflector and the third reflector and then is emitted to the die.
The pressing mechanism is a bidirectional pneumatic cylinder, a piston of the bidirectional pneumatic cylinder is connected with a pressurizing plate, and the bidirectional pneumatic cylinder drives the pressurizing plate to press the mold.
The die is a transparent laser ceramic die and is made of neodymium-doped yttrium aluminum garnet (Nd: YAG) materials, the die comprises a pressing die and a bottom die, a cavity is arranged in the bottom die, a heater is a continuous wave magnetic control tube, the continuous wave magnetic control tube is arranged in the cavity of the bottom die, a small hole is formed in the bottom surface of the bottom die, the continuous wave magnetic control tube penetrates out of the small hole through a lead and is connected with a rectifier outside a rack, and a plurality of exhaust holes are formed in the pressing die and the bottom die.
And a cavity is arranged on the side surface of the cavity of the bottom die, a temperature sensor, a pressure sensor and an oxygen content detector are arranged in the cavity, and the detection end of the temperature sensor is in contact with glass placed in the cavity of the bottom die.
The bottom surface of the pressing die is designed to be a honeycomb surface, the pressing die is provided with a bulge, the bottom die is provided with a groove matched with the bulge, and the pressing die is provided with a vent hole communicated with the cavity.
A hot bending method of a glass hot bending device based on laser shaping and orientation assistance comprises the following steps:
placing the glass to be hot-bent into a mold, pressing and connecting a pressing mold and a bottom mold, and placing the mold on a movable platform in a furnace chamber;
integrally preheating by microwave, switching on an alternating current power supply, converting the alternating current power supply into a direct current power supply through a rectifier, electrifying and heating a continuous wave magnetron in the mold, and preheating and heating the mold;
identifying the overall temperature distribution and the temperature T1 of the die in real time according to an infrared imager, wherein the overall temperature distribution refers to the average temperature of the die, if the overall temperature is lower than a set value T, the current of a direct-current power supply is adjusted through a control box, and the current is increased to increase the heating power of a continuous wave magnetron so as to continuously heat the die; if infrared ray becomesThe imager recognizes that the local temperature T2 of the mold is lower than the set value T, the CO is passed2The laser emits laser to focus on a corresponding lower-temperature local area, and secondary local heating temperature rise is carried out to obtain laser local heating;
combining the overall temperature distribution identified by the infrared imager and the accurate temperature T3 detected by the temperature sensor arranged in the die, if T3 is lower than a set value T, adjusting the current of the direct current power supply through the control box to heat and raise the temperature integrally, and performing three-time heating control for feedback control heating through laser focusing local heating;
when the integral temperature rises to a set value, the bidirectional pneumatic cylinder drives the pressurizing plate to press the mold for pressurizing treatment, so that the glass in the mold is bent.
The invention has the following beneficial effects:
the method has the advantages that the preheating area and the hot bending area are combined, so that the stations are reduced, various problems caused by station movement are avoided, the glass is uniformly heated and further extends to the hot bending processing of large-size glass by adopting a three-time heating mode of 'integral microwave preheating-local laser heating-feedback control heating' and double-temperature monitoring of an infrared imager and a temperature sensor, the laser is applied to the field of glass hot bending by utilizing the good optical characteristics of a laser ceramic die, the position precision and yield of the glass hot bending are greatly improved by combining a high-precision positioning system, the energy consumption is saved, and the curved glass with the excellent three-dimensional characteristic appearance is obtained.
Drawings
FIG. 1 is a schematic three-dimensional structure diagram of a laser-assisted machine tool machining apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a three-dimensional structure of a bottom mold according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a three-dimensional structure of a stamper according to an embodiment of the present invention;
FIG. 4 is a bottom mold schematic view of an embodiment of the present invention;
FIG. 5 is a schematic view of an inner structure of a bottom mold according to an embodiment of the present invention;
FIG. 6 is a process flow diagram in an embodiment of the invention;
FIG. 7 is a schematic diagram of optical path switching in an embodiment of the present invention;
the reference numbers are as follows:
1-CO2a laser, a 2-reflector guide rail, a 3-reflector 1, a 4-pressing die, a 5-bottom die, a 6-moving platform, a 7-fastening support rod, an 8-reflector 3, a 9-reflector support, a 10-reflector 2, a 11-support, a 12-rotating shaft, a 13-fastening support rod, a 14-bidirectional pneumatic cylinder-piston type mechanism, a 15-pressurizing plate, a 16-infrared camera, a 17-reflector 3, an 18-bottom die bulge, a 19-vent hole, a 20-temperature sensor, a 21-oxygen content detector, a 22-pressure sensor, a 23-vent hole, a 24-temperature sensor groove, a 25-oxygen content detector groove, a 26-pressure sensor groove, a 27-pressing die groove, a 28-honeycomb bottom surface, a, 29-continuous wave magnetic control tube, 30-adjustable bracket, 31-bottom die small hole and 32-shifting fork.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
As shown in the attached figures 1-7, the invention discloses a glass hot bending device based on laser shaping and orientation assistance, which comprises a furnace chamber arranged on a frame, wherein a movable bearing platform 6 is arranged in the furnace chamber, a mould 4 is arranged on the movable bearing platform 6, and CO positioned at one side of the movable bearing platform 6 is arranged in the furnace chamber2The device comprises a laser 1 and a light path switching mechanism, wherein a rotating shaft 12 is arranged on one side of a movable bearing platform 6, a CCD visual positioning assembly 17 and a pressing mechanism which are positioned above a mould 4 are respectively arranged on the rotating shaft 12, a temperature detection assembly is arranged in a furnace chamber, a heater 29 is arranged in the mould 4, the heater extends out of a machine frame through a lead and is connected with a rectifier, and the rotating shaft is connected with a rotary driver outside the machine frame; CO 22Laser light emitted by the laser device is emitted to the CCD visual positioning assembly after the direction is converted by the light path conversion mechanism and then is guided to the die, so that the local area of the die can be heated through laser focusing, and local heating adjustment is realized. The CCD visual positioning assembly is a high-resolution camera and can shoot high-definition images. The rectifier can be corresponding toThe control box is connected to adjust the current, and the rectifier converts alternating current into direct current so as to provide direct current for the heater, so that the heater heats and integrally heats the die.
In addition, a shifting fork feeding mechanism 32 is correspondingly arranged on the side edge of the die, so that the die moves one station along the feeding direction and enters a preheating-hot bending composite processing area, and the die automatically enters the next station after the working procedure of each station is completed. What shift fork feed mechanism adopted is prior art structure, mainly plays the removal material loading effect to the mould.
The pressing mechanism is a bidirectional pneumatic cylinder 14, a piston of the bidirectional pneumatic cylinder 14 is provided with a pressurizing plate 14, the bidirectional pneumatic cylinder drives the pressurizing plate to press the mold, and a piston rod reciprocates through the bidirectional air inlet and exhaust processes of the pneumatic cylinder so as to repeatedly pressurize and thermally bend the glass in the mold.
Movable bearing platform 6 can be through setting up X to removing the module and Y to removing the module to realize X to and Y to the removal, conveniently adjust the position of mould. This is a common device for hot bending furnace chamber and will not be described in detail.
The die 4 is a transparent laser ceramic die, is made of neodymium-doped yttrium aluminum garnet (Nd: YAG) materials, has high heat conductivity which is several times that of glass materials, is beneficial to reducing thermal effect, has high strength, has a melting point far higher than the softening point of glass, can bear higher radiation power, has good optical performance, good optical uniformity and good laser transmission monochromaticity, and can accurately heat the glass by combining with a laser processing process.
The mold 4 comprises a pressing mold 41 and a bottom mold 42, a cavity is arranged in the bottom mold 42 and used for placing glass, the heater 29 is a continuous wave magnetic control tube, the continuous wave magnetic control tube is arranged in the cavity of the bottom mold 42, a small hole 31 is formed in the bottom surface of the bottom mold 42, the continuous wave magnetic control tube 29 penetrates out of the small hole 31 through a lead and is connected with a rectifier outside the rack, a plurality of exhaust holes 23 are formed in the pressing mold 41 and the bottom mold 42, the exhaust holes 23 are formed in the edges of the pressing mold and the bottom mold, and exhaust inside the mold is facilitated. The rectifier is also connected with the control box, and the control box can be connected with computer, image display screen, utilizes the computer can be convenient control. The outside commercial power is converted into direct current by the rectifier and is supplied to the continuous wave magnetron, so that the continuous wave magnetron is electrified and heated.
The thickness of the pressing die 41 is smaller than that of the bottom die 42, and cavities are arranged on two sides of the cavity of the bottom die and play two roles, namely, the cavities are used for placing various sensors and storing redundant waste materials generated by edges when glass is bent in a hot mode. In order to facilitate press-fit installation, two sides of the pressing die 41 are provided with 2 grooves with the length of 1cm and the width of 8cm, two sides of the bottom die 42 are provided with 2 protrusions with the length of 1cm and the width of 8cm, and the protrusions are just clamped in the grooves when the pressing die and the bottom die are assembled, so that positioning matching is realized. In the cavity in the bottom mold, a temperature sensor 20, a pressure sensor 22, and an oxygen content detector 21 are installed, and the detection end of the temperature sensor is brought into contact with the glass placed in the cavity of the bottom mold. The temperature sensor, the pressure sensor and the oxygen content detector can be of a wireless structure, and can be assembled more flexibly. The temperature sensor, the pressure sensor and the oxygen content detector can be respectively in communication connection with an external controller or a computer so as to transmit the acquired data to the computer for analysis and processing.
During specific installation, in order to ensure accurate measurement and obtain various data, oxygen content detectors 21 are arranged at two sides of the cavity of the bottom die, which are close to the edge of the curved surface section, and the detectors are fixed by arranging installation holes at the bottom of the cavity.
Mounting holes are formed in the curved sections of the press mold 41 and the bottom mold 42 along the bending direction, and the temperature sensor 20 and the pressure sensor 22 are fixed in the mounting holes, so that one end of the temperature sensor 20 can be close to the glass, and more accurate temperature measurement can be realized.
And detecting and observing the overall temperature of the glass in the mold by using an infrared imager, checking the distribution condition of the temperature and controlling the whole. And a temperature sensor in the die is utilized to perform more accurate temperature detection, the temperature can be detected with higher precision (plus or minus 0.5 ℃), and a micro infinite thermocouple is adopted. The total temperature distribution of the infrared imager is combined with the local high-precision temperature of the temperature sensor, so that the glass hot bending process can be better controlled.
The bottom surface of the pressing die 41 is set to be a honeycomb surface 28, and the pressing die 41 is provided with vent holes 19 communicated with the cavity, so that the venting of the cavity is facilitated.
The rotating shaft 12 is movably arranged on the support 11, the support is arranged in the furnace cavity, the rotating shaft is arranged at the top of the furnace cavity, and two fastening support rods are arranged on the rotating shaft 12. For convenience of description, the CCD visual positioning component is arranged on the fastening support rod 7, the pressing mechanism is arranged on the other fastening support rod 13, and the two fastening support rods are arranged at 90 degrees. The axis of rotation is connected with external driver to can clockwise and anticlockwise circumferential rotation, drive two-way pneumatic cylinder rotation and CCD vision positioning component and remove directly over the mould, carry out corresponding effect respectively.
The temperature detection assembly comprises an infrared imager 16, an angle-adjustable support 30 is installed on the side wall of the furnace cavity, and the infrared imager 16 is installed on the angle-adjustable support 30. The adjustable angle support 30 is arranged at the middle upper part of the furnace chamber and can be connected with the infrared imager through a universal ball joint, thereby ensuring that the infrared imager can rotate within a certain angle range, detecting the temperature within the range of-10 ℃ to +1200 ℃, adjusting the adjustable angle support, enabling the infrared imager 16 to observe the temperature distribution and size of the glass in the mold from a plurality of visual angles, and realizing the temperature control with the precision of +/-2 ℃. The infrared imager 16 is mainly used for observing the temperature distribution of the glass and controlling the whole body.
To CO through the light path conversion mechanism2The laser emitted by the laser is subjected to time domain and space shaping, parameters (pulse energy, pulse number and the like) of the laser are controlled through a computer, and different laser parameter values are selected according to the size and the width of the hot bend.
The light path conversion mechanism comprises a reflector support 9, a first reflector 3, a second reflector 10 and a third reflector 8, a reflector guide rail 2 is arranged on the reflector support 9, the first reflector 3 is arranged at the lower part of the reflector guide rail 2 at 45 degrees, the second reflector 10 is arranged at the upper part of the reflector guide rail 2 at 45 degrees and is just opposite to the first reflector 3, and the third reflector 8 and the CD are seenThe feeling positioning component 17 is arranged on the same fastening support rod on the rotating shaft 12 and arranged at an angle of 45 degrees, and CO is2The laser ray emitted by the laser firstly irradiates the first reflector, the reflected laser ray irradiates the second reflector, the second reflector reflects the laser ray to the third reflector, the laser ray is reflected by the third reflector and then irradiates the mould, and the laser ray is focused and heated in a certain local area of the mould. The laser is reflected by the reflector and finally focused on the mold, so that the heating of a local area of the mold is realized. The first reflector and the second reflector can be clamped on the reflector guide rail, and the relative distance can be conveniently adjusted.
For the whole furnace chamber of the glass hot bending device, a compressed gas inlet pipe is arranged at the top of the furnace chamber, glass is well assembled in a mold and sent into the furnace chamber, a control box starts an air inlet valve and an air outlet valve, argon is continuously introduced into the furnace chamber, air is exhausted from an exhaust pipe at the bottom of the furnace chamber, and the components of the glass are prevented from being oxidized in the hot bending process, so that the physical and chemical properties of the final glass are prevented from being changed. Meanwhile, the concentration of oxygen is monitored in real time through an oxygen content detector 21 arranged on the die, and an air inlet valve and an air outlet valve are closed through a control box after air is exhausted. The corresponding air inlet pipe, air inlet valve, exhaust valve, etc. belong to the conventional structural components of the glass hot bending device, and are not described in detail.
The glass hot bending heating adopts a three-time heating mode of microwave integral preheating, laser local heating and feedback control heating. The glass hot bending forming process combines the preheating process and the hot bending process, and can simultaneously complete two processes in the same working area. CO 22The laser 1 is a nanosecond laser, the highest power is 100W, the frequency is adjustable in the range of 10kHz-100kHz, the pulse width is 10ns, the temperature of the mold is raised to 850 ℃ through a continuous wave magnetron 29, the pressure is increased to 0.45Mpa through a bidirectional pneumatic cylinder 14, the size of glass in the mold is 10 inches at most, and the process of laser shaping and orientation assisted large-size glass hot bending can be carried out.
A hot bending method of a glass hot bending device based on laser shaping and orientation assistance comprises the following steps:
the glass to be thermally bent is placed in a mold, a pressing mold is in press fit connection with a bottom mold, the mold is placed on a movable platform in a furnace chamber and is placed in a corresponding area, then argon is input into the furnace chamber, and exhaust is performed from the bottom of the furnace chamber, so that the problem of oxidation of the glass in the thermal bending process is prevented.
And (3) integrally preheating by microwave, switching on an alternating current power supply, converting the alternating current power supply into a direct current power supply through a rectifier, and electrifying and heating the continuous wave magnetron in the mold to integrally preheat and heat the mold.
The integral temperature distribution and the temperature T1 of the die are identified in real time according to an infrared imager, the integral temperature distribution refers to the average temperature of the die, namely the temperatures of all the areas are searched and added, then the average value is found to be T1, if the integral temperature is lower than a set value T, the current of a direct current power supply is adjusted through a control box, and the current is increased to increase the heating power of a continuous wave magnetron so as to continuously heat the die; if the infrared imager recognizes that the local temperature T2 of the mold is lower than the set value T, CO is passed2And focusing the corresponding lower-temperature local area by the laser emitted by the laser, and performing secondary local heating to raise the temperature, namely laser local heating.
The temperature distribution of the whole that combines the discernment of infrared imager and the accurate temperature T3 that the temperature sensor of arranging in the mould detected, if T3 is less than set point T, adjust DC power supply's electric current size through the control box and wholly heat the intensification to and through laser focus local heating, carry out cubic heating control, for feedback control heating, realize negative feedback temperature control, form cubic heating, satisfy the requirement of set point when guaranteeing the temperature is even. The CCD visual positioning assembly is introduced into the glass hot bending forming process, the high-resolution camera captures and transmits the image to the image display screen, the position needing laser local heating is accurately identified through computer analysis, and the shaped laser is combined to accurately heat the glass.
When the integral temperature rises to a set value, the bidirectional pneumatic cylinder drives the pressurizing plate to press the mold for pressurizing treatment, so that the glass in the mold is bent.
If the glass temperature is uniformly distributed and the temperature is equal to the softening point, the control box enables the rotating shaft 12 to rapidly rotate 90 degrees clockwise, the bidirectional air cylinder 14 drives the piston to move, the pressurizing plate is driven to act on the pressing die 41, the glass is bent, in order to prevent the temperature condition from changing, the rotating shaft 12 should periodically rotate, the microwave and the laser cooperate, and the bidirectional air cylinder 14 repeatedly moves to carry out multiple times of pressurizing and forming.
After the hot bending process is finished, the control box cuts off the power of the rectifier, the air inlet valve and the air outlet valve are started again, argon is continuously introduced into the furnace chamber, when the glass detected by the temperature sensor 20 and the thermal infrared imager 16 is cooled to the room temperature, the air inlet valve and the air outlet valve are closed, the purpose is to prevent the glass after the hot bending from being oxidized due to high-temperature contact with air, and meanwhile, the argon can also cool the glass through convection heat exchange.
Although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications, equivalents, improvements, and the like can be made in the technical solutions of the foregoing embodiments or in some of the technical features of the foregoing embodiments, but those modifications, equivalents, improvements, and the like are all within the spirit and principle of the present invention.
Claims (10)
1. A glass hot bending device based on laser shaping orientation assistance comprises a furnace chamber arranged on a frame, wherein a movable bearing platform is arranged in the furnace chamber, and a mold is arranged on the movable bearing platform2The device comprises a laser and a light path conversion mechanism, wherein a rotating shaft is arranged on one side of a movable bearing platform, a CCD visual positioning assembly and a pressing mechanism which are positioned above a die are respectively arranged on the rotating shaft, a temperature detection assembly is arranged in a furnace chamber, a heater is arranged in the die, the heater extends out of a rack through a lead and is connected with a rectifier, and the rotating shaft is connected with a rotary driver outside the rack;
CO2the laser light emitted by the laser is transmitted to the CCD visual positioning component after the direction is converted by the light path conversion mechanism and then is guided to the die.
2. The glass hot-bending device based on laser shaping and orientation assistance as claimed in claim 1, wherein the rotating shaft is movably mounted on the support, two fastening support rods are mounted on the rotating shaft, the CCD visual positioning assembly is mounted on one of the fastening support rods, and the pressing mechanism is mounted on the other fastening support rod.
3. The glass hot-bending device based on laser shaping and orientation assistance as claimed in claim 2, wherein two fastening support rods are mounted on the rotating shaft and arranged at 90 degrees, and the CCD visual positioning assembly is a high-definition camera.
4. The glass hot bending device based on laser shaping and orientation assistance as claimed in claim 3, wherein the temperature detection assembly comprises an infrared imager, and an angle-adjustable bracket is mounted on the side wall of the furnace cavity, and the infrared imager is mounted on the angle-adjustable bracket.
5. The glass hot-bending device based on laser shaping and orientation assistance as claimed in claim 4, wherein the light path conversion mechanism comprises a reflector support, a first reflector, a second reflector and a third reflector, a reflector guide rail is arranged on the reflector support, the first reflector is arranged at the lower part of the reflector guide rail at 45 degrees, the second reflector is arranged at the upper part of the reflector guide rail at 45 degrees and is arranged opposite to the first reflector, the third reflector and the CD visual positioning component are arranged on the same fastening support rod on the rotating shaft at 45 degrees, and CO is arranged at an angle of 45 degrees2The laser light emitted by the laser sequentially passes through the first reflector, the second reflector and the third reflector and then is emitted to the die.
6. The glass hot bending device based on the laser shaping orientation assistance as claimed in claim 5, wherein the pressing mechanism is a bidirectional pneumatic cylinder, a piston of the bidirectional pneumatic cylinder is provided with a pressurizing plate, and the bidirectional pneumatic cylinder drives the pressurizing plate to press the mold.
7. The device for hot bending glass based on laser shaping and orientation assistance as claimed in claim 6, wherein the mold is a transparent laser ceramic mold made of neodymium-doped yttrium aluminum garnet (Nd: YAG) material, the mold comprises a pressing mold and a bottom mold, a cavity is arranged in the bottom mold, the heater is a continuous wave magnetron, the continuous wave magnetron is arranged in the cavity of the bottom mold, a small hole is arranged on the bottom surface of the bottom mold, the wave magnetron penetrates out of the small hole through a lead to be connected with a rectifier outside the frame, and a plurality of exhaust holes are arranged on both the pressing mold and the bottom mold.
8. The device for hot bending glass based on laser shaping and orientation assistance as claimed in claim 7, wherein a cavity is formed in a side surface of the cavity of the bottom mold, a temperature sensor, a pressure sensor and an oxygen content detector are arranged in the cavity, and a detection end of the temperature sensor is in contact with the glass placed in the cavity of the bottom mold.
9. The device for hot bending glass based on laser shaping and orientation assistance according to claim 8, wherein the bottom surface of the press mold is provided with a honeycomb surface, the press mold is provided with protrusions, the bottom mold is provided with grooves matching with the protrusions, and the press mold is provided with vent holes communicating with the cavity.
10. A method of hot bending based on a laser shaping orientation assisted glass hot bending apparatus according to claim 9, characterized in that the method comprises the steps of:
placing the glass to be hot-bent into a mold, pressing and connecting a pressing mold and a bottom mold, and placing the mold on a movable platform in a furnace chamber;
integrally preheating by microwave, switching on an alternating current power supply, converting the alternating current power supply into a direct current power supply through a rectifier, electrifying and heating a continuous wave magnetron in the mold, and preheating and heating the mold;
the overall temperature distribution and the temperature T1 of the die are identified in real time according to the infrared imager, the overall temperature distribution refers to the average temperature of the die, and if the overall temperature is lower than a set value T, the current of the direct-current power supply is adjusted to be large through the control boxWhen the temperature is low, the current is increased to increase the heating power of the continuous wave magnetron so as to continuously heat the die; if the infrared imager recognizes that the local temperature T2 of the mold is lower than the set value T, CO is passed2The laser emits laser to focus on a corresponding lower-temperature local area, and secondary local heating temperature rise is carried out to obtain laser local heating;
combining the overall temperature distribution identified by the infrared imager and the accurate temperature T3 detected by the temperature sensor arranged in the die, if T3 is lower than a set value T, adjusting the current of the direct current power supply through the control box to heat and raise the temperature integrally, and performing three-time heating control for feedback control heating through laser focusing local heating;
when the integral temperature rises to a set value, the bidirectional pneumatic cylinder drives the pressurizing plate to press the mold for pressurizing treatment, so that the glass in the mold is bent.
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