CN116655223A - Automatic wire drawing and sealing device for glass tube and sealing method thereof - Google Patents
Automatic wire drawing and sealing device for glass tube and sealing method thereof Download PDFInfo
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- CN116655223A CN116655223A CN202310636723.XA CN202310636723A CN116655223A CN 116655223 A CN116655223 A CN 116655223A CN 202310636723 A CN202310636723 A CN 202310636723A CN 116655223 A CN116655223 A CN 116655223A
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- 239000011521 glass Substances 0.000 title claims abstract description 195
- 238000007789 sealing Methods 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005491 wire drawing Methods 0.000 title claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 57
- 238000013519 translation Methods 0.000 claims abstract description 30
- 238000010008 shearing Methods 0.000 claims abstract description 29
- 230000003287 optical effect Effects 0.000 claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 21
- 239000006060 molten glass Substances 0.000 claims abstract description 19
- 238000007493 shaping process Methods 0.000 claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims description 80
- 230000008859 change Effects 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 6
- 230000004927 fusion Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 16
- 238000002844 melting Methods 0.000 abstract description 10
- 230000008018 melting Effects 0.000 abstract description 9
- 238000009776 industrial production Methods 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 229910052722 tritium Inorganic materials 0.000 description 16
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 15
- 230000000694 effects Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000005388 borosilicate glass Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004093 laser heating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000005394 sealing glass Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- C03B23/04—Re-forming tubes or rods
- C03B23/045—Tools or apparatus specially adapted for re-forming tubes or rods in general, e.g. glass lathes, chucks
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/04—Re-forming tubes or rods
- C03B23/043—Heating devices specially adapted for re-forming tubes or rods in general, e.g. burners
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/04—Re-forming tubes or rods
- C03B23/09—Reshaping the ends, e.g. as grooves, threads or mouths
- C03B23/099—Reshaping the ends, e.g. as grooves, threads or mouths by fusing, e.g. flame sealing
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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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention discloses an automatic wire drawing and sealing device for a glass tube, which comprises the following components: the clamping mechanism is used for clamping two ends of the glass tube to be processed and driving the glass tube to rotate; an optical mechanism for generating laser light, transmitting the laser light and converging the laser light on a glass tube to be processed; the observation mechanism is used for adjusting the glass tube and observing the processing state of the glass tube; a shearing die for shearing molten glass and sealing and shaping a glass tube; the three-dimensional translation platform is used for driving the clamping mechanism to move to wire the glass tube and pushing the molten glass into the shearing and clamping mould; the scheme adopts the modes of laser hot melting and wire drawing sealing, thereby effectively avoiding the problems of uneven heating, poor sealing, low processing efficiency, poor reliability, poor quality of finished products and easily limited size of the processed glass tube in the sealing process of the glass tube; meanwhile, the scheme has high processing efficiency, is easy to integrate automatically and intelligently, and is suitable for large-scale industrial production.
Description
Technical Field
The invention relates to the technical field of glass tube sealing, in particular to an automatic wire drawing sealing device for a glass tube and a sealing method thereof.
Background
The tritium light source is a self-excitation light source which utilizes charged particles (beta particles) which are continuously released when the radionuclide-tritium decays to bombard and excite fluorescent substances to generate light radiation so as to realize the self-excitation light source under special environment. The tritium light source has the characteristics of no need of external power supply, no need of maintenance, stable light intensity, long service life and the like, is an ideal choice for special application occasions such as small-field illumination, target identification, isotope photovoltaic cells and the like in dark environments, and has huge social value and wide market prospect.
In research and application of tritium light sources, the service life and the luminous brightness are the most central problems, and are key factors for limiting whether the self-luminous light sources can be put into practical use. There are two main factors affecting the brightness and lifetime: the first is a luminescent material and the second is a sealing shell. The high borosilicate glass tube is usually selected as a sealing shell layer of the tritium light source, and the sealing process and the sealing quality of the high borosilicate glass tube directly influence the long-term stability and the service life of the tritium light source, so that the selection of a proper glass tube sealing process becomes a key problem for determining the service life of the tritium light source.
Conventionally, sealing of a glass tube is realized mainly by flame, such as simple equipment of an oxyhydrogen flame sealing machine or a flame torch, but the adoption of flame as a heat source for processing the glass tube is easy to cause defects of sharp head, flat head and the like, and potential safety hazards exist for later storage and use; in addition, the temperature is difficult to control in the flame sealing process, the hot melting area is large, the sealing effect is poor due to uneven heating, and even fluorescent materials in the sealing effect can be damaged; secondly, flame sealing requires operators to master the skilled processing skills, and the requirements on the working environment are high; the isotope of tritium as hydrogen is processed by flame, so that the burning of tritium gas is easy to be caused by improper operation, waste is caused, and serious safety accidents are caused in the processing process.
With the rise of intelligent manufacturing and the development of laser technology, the problems of connection, segmentation and sealing of fragile materials such as glass are solved by adopting laser processing, and the problems become hot; the high-power laser beam is used as a heat source, and the heat sealing device has the advantages of high energy density, non-contact processing, high temperature and position control precision, small heat affected zone and the like, so that the laser can be used for replacing flame to realize the heat sealing of the tritium light source glass tube; systems designs have been developed in the prior art that use lasers to seal tritium light source glass tubes.
For example, in the chinese patent with application number 2018216112528, a sealing and cutting system for sealing and cutting tritium light source glass tube by laser is designed, but only small-caliber capillary glass tube can be processed under the system, and the glass tube is directly fused and automatically sealed by using molten glass material, so that the sealing and cutting system cannot be used for glass tubes with larger inner diameters.
For example, in the chinese patent application No. CN202222039492.8, the problem that it is difficult to process a larger-sized glass tube is to perform laser heating on the end face of the glass tube until the glass tube is molten, and then the molten portion is automatically polymerized to the middle to complete sealing by means of rotation and gravity of the glass tube, so that the sealing is more biased to the hot-melt sealing.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an automatic glass tube wire drawing sealing device and a sealing method thereof, which solve the problems of low processing efficiency, poor reliability and difficult guarantee of the quality of finished products of the existing glass tube sealing device.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
in a first aspect, an automatic wire drawing sealing device for a glass tube is provided, which comprises:
the clamping mechanism is used for clamping two ends of the glass tube to be processed and driving the glass tube to rotate;
an optical mechanism for generating laser light, transmitting the laser light and converging the laser light on a glass tube to be processed;
the observation mechanism is used for adjusting the glass tube and observing the processing state of the glass tube;
a shearing die for shearing molten glass and sealing and shaping a glass tube;
the three-dimensional translation platform is used for driving the clamping mechanism to move to wire the glass tube and pushing the molten glass into the shearing and clamping mould.
Further, cut and press from both sides mould and include actuating mechanism, the last activity of actuating mechanism is provided with the cutting block and cuts the piece down, the one side symmetry that goes up cutting block and cut the piece down and be close to each other is provided with the arc cutting groove, two the homonymy end of arc cutting groove all is provided with outside convex arc blade, goes up two when cutting block and cut the piece down and draw close each other the arc cutting groove constitutes a sleeve that is used for the cover to establish the glass pipe, two the arc blade constitutes a hemisphere casing that is used for shutoff sleeve port jointly.
Further, actuating mechanism includes the lead screw, lead screw one end is connected with cutting the motor drive that presss from both sides, be provided with forward external screw thread and reverse external screw thread on the lead screw, go up the cutting and cut down the piece respectively with forward external screw thread and reverse external screw thread cooperation, go up the cutting and cut down all be provided with the stopper on the piece, the both ends of stopper all are provided with the fixture block, two the fixture block slides respectively and blocks and establish in two sliding tray.
Further, the fixture includes two centre gripping motors, two all be provided with in the pivot of centre gripping motor and be used for the chuck of centre gripping fixed glass pipe tip, two the chuck sets up in opposite directions, three-dimensional translation platform includes two X axial sliding tables, two all be provided with Y axial sliding table on the X axial sliding table, two all be provided with Z axial sliding table on the Y axial sliding table, two the centre gripping motor sets up respectively on two Z axial sliding tables.
Further, the optical mechanism comprises a laser, an optical assembly is arranged at the front end of the laser, the optical assembly comprises a first array mirror, a second array mirror and a first focusing lens, and laser of the laser is converged on the glass tube through the first focusing lens after being reflected by the first array mirror and the second array mirror in sequence.
Further, observation mechanism includes industrial camera, thermoscope and distancer, industrial camera's camera lens front end is provided with second focusing lens, second focusing lens's front end is provided with the shielding lens, the front end of shielding lens is provided with second speculum and the first speculum that is used for collecting glass pipe appearance change.
In a second aspect, a sealing method of an automatic wire drawing sealing device for a glass tube is provided, which comprises the following steps:
s1, clamping two ends of a glass tube by adopting a clamping mechanism, and driving the glass tube to rotate by the clamping mechanism after clamping, debugging and stabilization are carried out;
s2, adjusting the optical mechanism and the three-dimensional translation table until laser emitted by the optical mechanism is irradiated to a sealing part of the glass tube;
s3, performing laser irradiation on the sealing part of the glass tube by adopting an optical mechanism until the sealing part of the glass tube reaches a molten state, and closing the optical mechanism; drawing the molten part of the glass tube by moving the three-dimensional translation table with a clamping mechanism;
s4, shearing the fusion position of the glass tube by adopting a shearing and clamping die, and pushing the fusion end of the glass tube into the shearing and clamping die through a three-dimensional translation table to seal and shape, so as to obtain a sealing finished product of the glass tube.
Further, the method for clamping and debugging the glass tube in the step S1 comprises the following steps:
a1: two ends of the glass tube are respectively clamped and fixed on two chucks;
a2: synchronously starting two clamping motors, and continuously shooting the glass tube for a preset time length through an industrial camera;
a3: extracting outline characteristics of a plurality of photographed pictures to obtain a plurality of corresponding projection pictures;
a4: overlapping the projection pictures, and extracting outline characteristics of the overlapped integral pictures to obtain a moving offset picture of the glass tube;
a5: comparing the radial size of the glass tube in the motion offset picture with the actual radial size of the glass tube; if the deviation value is smaller than the set threshold value, completing clamping and debugging of the glass tube; if the deviation value is greater than or equal to the set threshold value, the clamping motor is turned off, the glass tube is taken off from the chuck, and the step A1 is returned.
Further, the step S2 specifically includes the following steps:
b1: adjusting the three-dimensional translation stage until the sealing part of the glass tube moves to an irradiation path of the laser, and the light spots converged by the laser vertically irradiate on the glass tube;
b2: and adjusting the distance between the first focusing lens and the glass tube until the spot size obtained on the glass tube is equal to the preset size.
Further, the steps S3 and S4 specifically include the following steps:
c1: starting a laser, an industrial camera and a thermometer, observing the shape change and the temperature change of the glass tube under the action of laser, and closing the laser after the sealing part of the glass tube reaches a molten state;
c2: reducing the rotating speed of a clamping motor positioned on the same side of the opening end of the arc-shaped cutting groove, closing another clamping motor, adjusting the three-dimensional translation table, and enabling the closed clamping motor to move a preset distance along the extending direction of the glass tube, so that the sealing part of the glass tube forms filiform fused glass;
and C3: the upper cutting block and the lower cutting block are driven to be mutually close, and the drawn filiform molten glass is sheared through the two arc-shaped cutting edges;
and C4: the three-dimensional translation stage is regulated, so that a clamping motor positioned on the same side of the opening end of the arc-shaped cutting groove moves to the other clamping motor by a preset distance, the sheared molten glass is pushed into the hemispherical shell, and the sheared position of the molten glass is sealed through the sleeve and the hemispherical shell;
c5: after the glass tube is cooled and shaped, the upper cutting block and the lower cutting block are driven to be far away from each other, a clamping motor positioned on the same side of the opening end of the arc-shaped cutting groove is closed, and a sealing finished product of the glass tube is taken down.
The beneficial effects of the invention are as follows:
1. the scheme adopts the modes of laser hot melting and wire drawing sealing, thereby effectively avoiding the problems of uneven heating, poor sealing, low processing efficiency, poor reliability, poor quality of finished products and easily limited size of the processed glass tube in the sealing process of the glass tube; the scheme has high processing efficiency, is easy to integrate automatically and intelligently, is suitable for large-scale industrial production, adopts laser to complete automatic sealing of the tritium light source glass tube, and has important pushing effect on the industrial production of the tritium light source.
2. The laser processing has the unique advantages of high energy density, non-contact, high temperature and position control precision, small heat affected zone and the like, can successfully realize the hot-melt sealing of various large-size glass tubes, and can ensure the effects of good sealing performance, perfect appearance of a sealing area, processing dimensional precision and the like.
3. By adopting the wire drawing sealing mode, the efficiency of sealing and forming the glass tube is greatly improved, so that the size range of the glass tube which can be processed is wider.
4. Directly cutting the filiform molten glass through a cutting and clamping die, and sealing and shaping the molten glass in the sleeve and the hemispherical shell while cutting; meanwhile, the shape of the arc-shaped cutting edge can be changed according to the requirements on the shape of the seal, so that glass tubes with different seal shapes can be manufactured conveniently.
5. Through the three-dimensional translation platform, the position adjustment of the glass tube on the three-dimensional space can be realized, the wire drawing action can be completed, and the position of the glass tube to the focusing lens can be accurately adjusted under the assistance of the range finder, so that the size of a light spot irradiated on the surface of the glass tube can be changed.
Drawings
Fig. 1 is a schematic structural diagram of the automatic wire drawing sealing device for the glass tube.
Fig. 2 is a schematic diagram of the present solution.
Fig. 3 is a schematic structural view of the cooperation of the clamping mechanism and the shearing die.
Fig. 4 is a schematic structural view of a clipping mold.
Wherein, 1, a clamping motor, 2, a three-dimensional translation table, 201, an X axial sliding table, 202, a Y axial sliding table, 203, a Z axial sliding table, 3, a chuck, 4, a driving mechanism, 41, a screw rod, 42, a shearing motor, 43, a forward external thread, 44, a reverse external thread, 45, a limiting block, 46, a clamping block, 47, a sliding groove, 5, an upper cutting block, 6, a lower cutting block, 7, arc-shaped cutting grooves, 8, arc-shaped cutting edges, 9, lasers, 10, industrial cameras, 11, thermometers, 12, rangefinders, 13, first array mirrors, 14, second array mirrors, 15, first focusing lenses, 16, second focusing lenses, 17, shading mirrors, 18, first reflecting mirrors, 19, second reflecting mirrors, 20, computers, 21 and glass tubes.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
As shown in fig. 1 to 4, the automatic glass tube drawing and sealing device in the scheme comprises a sealing mechanism, an optical mechanism and an observation mechanism.
The sealing mechanism comprises a clamping mechanism and a shearing and clamping die, the clamping mechanism comprises two clamping motors 1, the clamping motors 1 are preferably stepping motors, the two clamping motors 1 are arranged on a three-dimensional translation table 2, the three-dimensional translation table 2 comprises two X axial sliding tables 201, Y axial sliding tables 202 are arranged on the two X axial sliding tables 201, Z axial sliding tables 203 are arranged on the two Y axial sliding tables 202, and the two clamping motors 1 are respectively arranged on the two Z axial sliding tables 203; the chuck 3 used for clamping and fixing the glass tube 21 is arranged on the rotating shafts of the two clamping motors 1, the two chucks 3 are oppositely arranged and can be used for clamping and fixing two ends of the glass tube 21 respectively, the clamping motors 1 can drive the chucks 3 and the glass tube 21 clamped by the chucks 3 to rotate, and the chucks 3 can ensure concentricity of the glass tube 21 during rotary processing.
The shearing and clamping die comprises a driving mechanism 4, an upper cutting block 5 and a lower cutting block 6 are movably arranged on the driving mechanism 4, arc-shaped cutting grooves 7 are symmetrically arranged on one sides, close to each other, of the upper cutting block 5 and the lower cutting block 6, arc-shaped cutting edges 8 protruding outwards are arranged at the same side ends of the two arc-shaped cutting grooves 7, the two arc-shaped cutting grooves 7 when the upper cutting block 5 and the lower cutting block 6 are mutually closed together form a sleeve for sleeving a glass tube 21, and the two arc-shaped cutting edges 8 jointly form a hemispherical shell for blocking a port of the sleeve.
The driving mechanism 4 comprises a screw rod 41, one end of the screw rod 41 is in transmission connection with a shearing motor 42, a forward external thread 43 and a reverse external thread 44 are arranged on the screw rod 41, an upper cutting block 5 and a lower cutting block 6 are respectively in threaded fit with the forward external thread 43 and the reverse external thread 44, limiting blocks 45 are arranged on the upper cutting block 5 and the lower cutting block 6, clamping blocks 46 are arranged at two ends of the limiting blocks 45, and the two clamping blocks 46 are respectively and slidably clamped in two sliding grooves 47; through the transmission of the shearing motor 42 and the screw rod 41, the upper cutting block 5 and the lower cutting block 6 can be mutually close to and far away from each other, and meanwhile, the limiting block 45 and the clamping block 46 are arranged, so that the upper cutting block 5 and the lower cutting block 6 are effectively prevented from rotating in the moving process.
The optical mechanism consists of a laser 9, an optical component and a circulating water cooling device, wherein the laser 9 adopts a carbon dioxide laser 9 to emit laser with the wavelength of 10.6 mu m, an external light path mainly consists of the optical component and is used for transmitting and converging laser energy on a glass tube 21 to be processed, the optical component comprises a first array mirror 13, a second array mirror 14 and a first focusing lens 15, the laser of the laser 9 sequentially passes through the first array mirror 13 and the second array mirror 14 to be reflected and then is converged on the glass tube 21 through the first focusing lens 15, the circulating water cooling device is used for cooling the laser 9, the working temperature of the laser 9 is maintained, the luminous quality and the service life of the laser 9 are ensured, and the laser 9 can stably run.
The observation mechanism comprises an industrial camera 10, a thermometer 11 and a range finder 12, wherein the front end of a lens of the industrial camera 10 is provided with a second focusing lens 16, the front end of the second focusing lens 16 is provided with a shading lens 17, the front end of the shading lens 17 is provided with a second reflecting mirror 19 and a first reflecting mirror 18 for collecting the shape change of a glass tube 21, the shape change of the glass tube 21 under laser irradiation is monitored in real time through the industrial camera 10 so as to judge the wire drawing time, and the change of a melting area and the sealing effect under different process parameters can be accurately observed so as to further optimize the process parameters and improve the yield; the thermometer 11 is used for monitoring the temperature change of the glass tube 21 and the thermal influence range caused by the melting area during molding in real time, and is mainly used for monitoring the spatial distribution of the temperature field of the glass tube 21 when sealing is completed under the process parameters, determining the temperature change of the glass tube 21 in the whole process of hot-melting the wire-drawing sealing glass tube 21 so as to determine the filling range of the material in the subsequent glass tube 21, and the monitored temperature value can also assist in judging the wire-drawing time; the distance meter 12 is used for measuring the distance between the glass tube 21 and the first focusing lens 15, the size of the light spot can be converted by adopting a similar triangle rule through the relation between the distance between the first focusing lens 15 and the glass tube 21 and the diameter of the laser beam, otherwise, the distance meter 12 is used for measuring the distance between the first focusing lens 15 and the glass tube 21, and the three-dimensional translation stage 2 is controlled to move by corresponding displacement to reach the position of the required light spot size.
The clamping motor 1, the three-dimensional translation table 2, the shearing and clamping motor 42, the laser 9, the industrial camera 10, the thermometer 11 and the range finder 12 are electrically connected with the computer 20 through the controller, so that the integrated control of the glass tube 21 sealing process is realized.
The function of the components of the present solution is described in detail below:
the first lens array 13 is used for adjusting the irradiation path of the laser in the X-axis direction and preventing the laser from being vertically irradiated back to the laser 9 after acting on the glass tube 21 to damage laser components; a second matrix mirror 14 for adjusting the irradiation path of the laser in the Y-axis direction; a first focusing lens 15 for focusing the parallel laser beams; a first mirror 18 for reflecting the morphology of the glass tube 21 to the second mirror 19; a second reflecting mirror 19 for reflecting the morphology of the glass tube 21 for observation by the industrial camera 10; a three-dimensional translation stage 2 for adjusting the position of the laser acting on the glass tube 21 and the distance from the glass tube 21 to the lens to change the size of the spot acting on the glass tube 21, and subsequent control of the drawing action of the glass tube 21, and control of pushing the molten glass into the clip mold; a light shielding lens 17 for shielding the white light reflected by the second reflecting mirror 19, avoiding damage to the photosensitive element of the industrial camera 10 due to strong light irradiation, and being more beneficial to observing the morphological details of the glass tube 21 without strong light irradiation; a second focusing lens 16 for converging the reflected light from the second reflecting mirror 19 so that the industrial camera 10 can clearly record the sealing and cutting process of the glass tube 21; and the shearing and clamping mould is used for shearing and clamping the glass in a molten state, shearing the glass in the molten state, pushing the glass in the molten state of the finished end glass tube 21 clamped by the rotary table into the hemispherical shell, and cooling and shaping.
The scheme also provides a sealing method of the automatic glass tube wire drawing and sealing device, which comprises the following steps:
s1, clamping two ends of a glass tube 21 by a clamping mechanism, and driving the glass tube 21 to rotate by the clamping mechanism after the clamping adjustment is stable; the clamping debugging method specifically comprises the following steps:
a1: clamping and fixing the two ends of the glass tube 21 on the two chucks 3 respectively;
a2: synchronously starting two clamping motors 1, and continuously shooting the glass tube 21 for a preset time length through an industrial camera 10;
a3: extracting outline characteristics of a plurality of photographed pictures to obtain a plurality of corresponding projection pictures;
a4: overlapping the projection pictures, and extracting outline features of the overlapped whole pictures to obtain a moving offset picture of the glass tube 21;
a5: comparing the radial dimension of the glass tube 21 in the motion offset picture with the actual radial dimension of the glass tube 21; if the deviation value is smaller than the set threshold value, completing clamping and debugging of the glass tube; if the deviation value is equal to or greater than the set threshold value, the clamping motor 1 is turned off, the glass tube 21 is removed from the chuck 3, and the process returns to step A1.
S2, adjusting the optical mechanism and the three-dimensional translation table 2 until laser emitted by the optical mechanism is irradiated to a sealing part of the glass tube 21; the method specifically comprises the following steps:
b1: adjusting the three-dimensional translation table 2 until the sealing part of the glass tube 21 moves to the irradiation path of the laser 9, and the light spots converged by the laser vertically irradiate on the glass tube 21;
b2: the distance between the first focusing lens 15 and the glass tube 21 is adjusted until a spot size equal to a preset size is obtained on the glass tube 21.
S3, performing laser irradiation on the sealing part of the glass tube 21 by adopting an optical mechanism until the sealing part of the glass tube 21 reaches a molten state, and closing the optical mechanism; drawing the molten part of the glass tube 21 by moving the three-dimensional translation table 2 with a clamping mechanism;
and S4, shearing the melting position of the glass tube 21 by adopting a shearing and clamping die, and pushing the melting end of the glass tube into the shearing and clamping die through a three-dimensional translation table 2 to seal and shape, so as to obtain a sealing finished product of the glass tube 21.
The steps S3 and S4 specifically include the following steps:
c1: debugging the industrial camera 10 and the thermometer 11 to enable the industrial camera 10 to clearly observe the shape change of the glass tube 21 under the action of laser, starting the laser 9, the industrial camera 10 and the thermometer 11 after the thermometer 11 can clearly observe the temperature change of the glass tube 21, and observing the shape change and the temperature change of the glass tube 21 under the action of laser until the sealing part of the glass tube 21 reaches a molten state, and closing the laser 9;
c2: reducing the rotation speed of the clamping motor 1 positioned on the same side of the opening end of the arc-shaped cutting groove 7, closing the other clamping motor 1, adjusting the three-dimensional translation table 2, and enabling the closed clamping motor 1 to move a preset distance along the extending direction of the glass tube 21, so that the sealing part of the glass tube 21 forms filiform fused glass;
and C3: the upper cutting block 5 and the lower cutting block 6 are driven to be mutually close, and the drawn filiform molten glass is sheared through two arc-shaped cutting edges 8;
and C4: the three-dimensional translation table 2 is regulated, so that the clamping motor 1 positioned on the same side of the opening end of the arc-shaped cutting groove 7 moves to the other clamping motor 1 for a preset distance, the sheared molten glass is pushed into the hemispherical shell, and the sheared position of the molten glass is sealed through the sleeve and the hemispherical shell;
c5: after the glass tube 21 is cooled and shaped, the upper cutting block 5 and the lower cutting block 6 are driven to be away from each other, the clamping motor 1 positioned on the same side of the opening end of the arc-shaped cutting groove 7 is closed, and the sealing finished product of the glass tube 21 is taken down.
The technical parameters of the sealing process are adjusted, and the sealing method is repeatedly executed, so that the technical parameters are optimized in a practical mode, the optimal processing parameters are obtained, and the optimal processing parameters are put into industrial production, so that the sealing efficiency, the quality of finished products and the yield of the glass tube 21 are ensured, wherein the adjustment of the technical parameters comprises the laser power, the light spot size, the set threshold value, the preset distance, the hot melting working time, the rotating speed of the clamping motor 1, the cooling shaping time of the glass tube 21 and the like.
According to the scheme, all the components are integrated in the box body, so that the integration of operation, observation and recording can be realized, the efficiency is improved, and the labor is saved; when the box body is not processed, the box body is closed to play a role in dust prevention so as to protect all parts; meanwhile, when in processing, the box body can stop the light rays diffusely reflected by the laser, and plays a certain role in protecting staff.
The scheme adopts the modes of laser hot melting and wire drawing sealing, so that the problems of uneven heating, poor sealing, low processing efficiency, poor reliability, poor quality of finished products and easily limited size of the processed glass tube 21 of the glass tube 21 in the sealing process are effectively avoided; the scheme has high processing efficiency, is easy to integrate automatically and intelligently, is suitable for large-scale industrial production, adopts laser to complete automatic sealing of the tritium light source glass tube 21, and has important pushing effect on the industrial production of the tritium light source.
Claims (10)
1. An automatic wire drawing sealing device for a glass tube, which is characterized by comprising:
the clamping mechanism is used for clamping two ends of the glass tube to be processed and driving the glass tube to rotate;
an optical mechanism for generating laser light, transmitting the laser light and converging the laser light on a glass tube to be processed;
the observation mechanism is used for adjusting the glass tube and observing the processing state of the glass tube;
a shearing die for shearing molten glass and sealing and shaping a glass tube;
the three-dimensional translation platform is used for driving the clamping mechanism to move to wire the glass tube and pushing the molten glass into the shearing and clamping mould.
2. The automatic glass tube drawing and sealing device according to claim 1, wherein the cutting and clamping die comprises a driving mechanism, an upper cutting block and a lower cutting block are movably arranged on the driving mechanism, arc-shaped cutting grooves are symmetrically formed in one sides, close to each other, of the upper cutting block and the lower cutting block, arc-shaped cutting edges protruding outwards are formed in the same side ends of the two arc-shaped cutting grooves, when the upper cutting block and the lower cutting block are close to each other, the two arc-shaped cutting grooves form a sleeve for sleeving a glass tube, and the two arc-shaped cutting edges jointly form a hemispherical shell for plugging a port of the sleeve.
3. The automatic glass tube drawing and sealing device according to claim 2, wherein the driving mechanism comprises a screw rod, one end of the screw rod is in transmission connection with the shearing motor, a forward external thread and a reverse external thread are arranged on the screw rod, the upper cutting block and the lower cutting block are respectively in threaded fit with the forward external thread and the reverse external thread, limiting blocks are arranged on the upper cutting block and the lower cutting block, clamping blocks are arranged at two ends of the limiting blocks, and the two clamping blocks are respectively and slidably clamped in the two sliding grooves.
4. The automatic glass tube drawing and sealing device according to claim 1, wherein the clamping mechanism comprises two clamping motors, chucks used for clamping and fixing the end parts of the glass tube are arranged on rotating shafts of the two clamping motors, the two chucks are arranged in opposite directions, the three-dimensional translation table comprises two X axial sliding tables, Y axial sliding tables are arranged on the two X axial sliding tables, Z axial sliding tables are arranged on the two Y axial sliding tables, and the two clamping motors are respectively arranged on the two Z axial sliding tables.
5. The automatic glass tube wiredrawing and sealing device according to claim 1, wherein the optical mechanism comprises a laser, an optical assembly is arranged at the front end of the laser, the optical assembly comprises a first array mirror, a second array mirror and a first focusing lens, and laser light of the laser is converged on the glass tube through the first focusing lens after being reflected by the first array mirror and the second array mirror in sequence.
6. The automatic glass tube drawing and sealing device according to claim 1, wherein the observation mechanism comprises an industrial camera, a thermometer and a range finder, a second focusing lens is arranged at the front end of a lens of the industrial camera, a light shielding lens is arranged at the front end of the second focusing lens, and a second reflecting mirror and a first reflecting mirror for collecting morphology changes of the glass tube are arranged at the front end of the light shielding lens.
7. The sealing method of an automatic wire drawing sealing device for glass tubes according to any one of claims 1 to 6, comprising the steps of:
s1, clamping two ends of a glass tube by adopting a clamping mechanism, and driving the glass tube to rotate by the clamping mechanism after clamping, debugging and stabilization are carried out;
s2, adjusting the optical mechanism and the three-dimensional translation table until laser emitted by the optical mechanism is irradiated to a sealing part of the glass tube;
s3, performing laser irradiation on the sealing part of the glass tube by adopting an optical mechanism until the sealing part of the glass tube reaches a molten state, and closing the optical mechanism; drawing the molten part of the glass tube by moving the three-dimensional translation table with a clamping mechanism;
s4, shearing the fusion position of the glass tube by adopting a shearing and clamping die, and pushing the fusion end of the glass tube into the shearing and clamping die through a three-dimensional translation table to seal and shape, so as to obtain a sealing finished product of the glass tube.
8. The sealing method according to claim 7, wherein the method for clamping and debugging the glass tube in the step S1 comprises the following steps:
a1: two ends of the glass tube are respectively clamped and fixed on two chucks;
a2: synchronously starting two clamping motors, and continuously shooting the glass tube for a preset time length through an industrial camera;
a3: extracting outline characteristics of a plurality of photographed pictures to obtain a plurality of corresponding projection pictures;
a4: overlapping the projection pictures, and extracting outline characteristics of the overlapped integral pictures to obtain a moving offset picture of the glass tube;
a5: comparing the radial dimension of the glass tube in the motion offset picture with the actual radial dimension of the glass tube; if the deviation value is smaller than the set threshold value, completing clamping and debugging of the glass tube; if the deviation value is greater than or equal to the set threshold value, the clamping motor is turned off, the glass tube is taken off from the chuck, and the step A1 is returned.
9. A method of sealing according to claim 7, wherein step S2 comprises the steps of:
b1: adjusting the three-dimensional translation stage until the sealing part of the glass tube moves to an irradiation path of the laser, and the light spots converged by the laser vertically irradiate on the glass tube;
b2: and adjusting the distance between the first focusing lens and the glass tube until the spot size obtained on the glass tube is equal to the preset size.
10. A method of sealing according to claim 7, wherein steps S3 and S4 comprise the steps of:
c1: starting a laser, an industrial camera and a thermometer, observing the shape change and the temperature change of the glass tube under the action of laser, and closing the laser after the sealing part of the glass tube reaches a molten state;
c2: reducing the rotating speed of a clamping motor positioned on the same side of the opening end of the arc-shaped cutting groove, closing another clamping motor, adjusting the three-dimensional translation table, and enabling the closed clamping motor to move a preset distance along the extending direction of the glass tube, so that the sealing part of the glass tube forms filiform fused glass;
and C3: the upper cutting block and the lower cutting block are driven to be mutually close, and the drawn filiform molten glass is sheared through the two arc-shaped cutting edges;
and C4: the three-dimensional translation stage is regulated, so that a clamping motor positioned on the same side of the opening end of the arc-shaped cutting groove moves to the other clamping motor by a preset distance, the sheared molten glass is pushed into the hemispherical shell, and the sheared position of the molten glass is sealed through the sleeve and the hemispherical shell;
c5: after the glass tube is cooled and shaped, the upper cutting block and the lower cutting block are driven to be far away from each other, a clamping motor positioned on the same side of the opening end of the arc-shaped cutting groove is closed, and a sealing finished product of the glass tube is taken down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310636723.XA CN116655223A (en) | 2023-05-31 | 2023-05-31 | Automatic wire drawing and sealing device for glass tube and sealing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310636723.XA CN116655223A (en) | 2023-05-31 | 2023-05-31 | Automatic wire drawing and sealing device for glass tube and sealing method thereof |
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| CN116655223A true CN116655223A (en) | 2023-08-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117088619A (en) * | 2023-10-20 | 2023-11-21 | 山西东玉玻璃股份有限公司 | Glassware opening etching equipment |
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- 2023-05-31 CN CN202310636723.XA patent/CN116655223A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117088619A (en) * | 2023-10-20 | 2023-11-21 | 山西东玉玻璃股份有限公司 | Glassware opening etching equipment |
| CN117088619B (en) * | 2023-10-20 | 2023-12-19 | 山西东玉玻璃股份有限公司 | Glassware opening etching equipment |
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