CN114538798A - Method for reducing gap of glass sample by using high-voltage direct-current power supply and application thereof - Google Patents
Method for reducing gap of glass sample by using high-voltage direct-current power supply and application thereof Download PDFInfo
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- CN114538798A CN114538798A CN202111559745.8A CN202111559745A CN114538798A CN 114538798 A CN114538798 A CN 114538798A CN 202111559745 A CN202111559745 A CN 202111559745A CN 114538798 A CN114538798 A CN 114538798A
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- glass
- power supply
- voltage direct
- gap
- conductive material
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/06—Joining glass to glass by processes other than fusing
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/06—Joining glass to glass by processes other than fusing
- C03C27/08—Joining glass to glass by processes other than fusing with the aid of intervening metal
-
- 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 method for reducing the gap between two glass samples by using a high-voltage direct-current power supply is characterized in that the two glass samples are mutually stacked, an upper conductive material and a lower conductive material are respectively placed on the upper surface and the lower surface of the two stacked glass samples, the upper conductive material and the lower conductive material are respectively connected with the positive end and the negative end of the high-voltage direct-current power supply through conducting wires, so that the glass samples are placed in a high-voltage direct-current electric field, and the gap between the two glasses is shortened by controlling the electrostatic attraction of positive ions and negative ions in the glass by using a strong-field electric field generated by the high-voltage direct-current power supply. The operation is efficient and convenient, the industrial production and application are facilitated, the accuracy and the efficiency of the gap change of the welding samples are obviously improved, and the technical problems that the welding areas of the two pieces of glass are difficult to control and the pressure control area is not uniform are solved. The change rule of the glass welding appearance in a high-field electric field is analyzed, and experimental verification of a double-temperature model in glass welding theoretical research and change and physicochemical change of a plasma diffusion track in the welding process are explored.
Description
Technical Field
The invention relates to the technical field of glass welding, in particular to a method for reducing a gap of a glass sample by using a high-voltage direct-current power supply and application thereof.
Background
For the stitch welding process of glass samples, the size of the welding sample gap has very important influence on the welding effect and the welding quality, so that a high-efficiency and convenient welding sample gap control method needs to be explored. The existing methods for controlling the gap of a welding sample comprise an optical bonding method and an air pump extrusion and laser preheating method, and the physical mechanism for shortening the gap of the glass sample is summarized as follows: the optical bonding and air pump extrusion method utilizes mechanical force to control the physical distance of the sample; the laser preheating method adopts laser to act on glass to form a melting point, and controls the physical distance of a welding sample by using the surface tension of liquid. The optical bonding method is complex in operation and low in efficiency, and is not suitable for industrial production and application; the method of air pump extrusion can not make the welding sample force uniform, and the welding area can not be finely regulated; the laser preheating method needs to regulate and control laser parameters and assist an air pump to extrude the clamp, and the process is complicated.
When the glass is used as a dielectric medium, when a high-voltage electric field is applied to the glass, anions and cations originally distributed in a random manner in the material are regularly arranged under the action of the electric field, and the physical distance between glass samples is shortened due to the attraction effect of the anions and the cations. Therefore, the invention provides a method for reducing the gap of the glass sample by using a high-voltage direct-current power supply.
Disclosure of Invention
Because the glass has a network structure, the silicon-oxygen bond polar covalent bond with extremely strong bond in the silicate glass forms a skeleton of the network structure, and metal cations filled in the network structure are combined to form an ionic bond and have fluidity. At room temperature, glass has a high resistivity and is a poor conductor. Under the action of an external electric field, metal cations in the glass structure become carriers, and the carriers migrate under the action of the electric field to show a conductive action. Based on the technical scheme, the invention aims to control the electrostatic attraction of positive and negative ions in glass to shorten the gap between the two glasses by using a strong field electric field generated by a high-voltage direct-current power supply.
The technical scheme adopted by the invention is as follows:
cleaning the glass samples to be welded in an ultrasonic cleaning machine, drying the glass samples to be welded by using nitrogen, and stacking the glass samples to be welded together;
placing the lower layer glass of the glass sample to be welded on the conductive metal fixing block, pasting the conductive metal foil on the surface of the upper layer glass according to the required shape, respectively connecting the conductive metal foil and the conductive metal fixing block with the positive electrode and the negative electrode of the high-voltage direct-current power supply through the metal lead, adjusting the output voltage and time of the high-voltage direct-current power supply, and reducing the gap size of the glass sample to be welded;
and after the gap of the glass sample to be welded is regulated and controlled, turning on a laser to weld the two pieces of glass, and turning off the high-voltage direct-current power supply or continuously pressurizing to perform subsequent research.
According to the high-voltage direct-current power supply control system for the glass welding sample gap, the strong field electric field generated by the high-voltage direct-current power supply is utilized to control the regular arrangement of the disordered positive and negative ions in the glass serving as an electrolyte material, the physical distance between the two glasses is shortened by utilizing the electrostatic attraction of the positive and negative ions, and the change of the gap of a glass sample is observed through the pattern of the interference fringes with the same thickness.
Compared with the prior art, the invention has the beneficial effects that:
1) the operation of controlling the gap of the glass sample by the high-voltage direct-current power supply is efficient and convenient, and the industrial production and application are facilitated.
2) The high-voltage direct-current power supply has continuously adjustable voltage intensity, and can quantitatively control the gap of the glass sample by combining the control of the pressurization time, thereby obviously improving the accuracy and efficiency of the gap change of the welding sample.
3) The technical problems that welding areas of two pieces of glass are difficult to control and the pressure control area is not uniform are solved by accurately controlling the shape of a conductive metal material to be arranged in a glass area inside a high-voltage electric field.
4) The change rule of the glass welding appearance in a high-field electric field is analyzed, and experimental verification of a double-temperature model in glass welding theoretical research and change and physicochemical change of a plasma diffusion track in the welding process are explored.
Drawings
FIG. 1 is a schematic structural diagram of a high-voltage direct-current power supply control method for a gap between glass samples to be welded according to an embodiment of the invention;
FIGS. 2 and 3 are schematic implementation diagrams of embodiments of the present invention;
FIG. 4 is a schematic diagram of a single-shape structure of a conductive metal foil according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a combined shape structure of a conductive metal foil according to an embodiment of the present invention;
FIG. 6 is a schematic view of a single-shape structure of a conductive metal fixing block according to an embodiment of the present invention;
FIG. 7 is a schematic view of a combined shape structure of a conductive metal fixing block according to an embodiment of the present invention;
FIG. 8 is a flow chart of a process for reducing a glass gap by the high voltage DC power supply in the embodiment of the present invention.
Description of the main element symbols:
| glass sample to be welded | 10 | |
20 |
| Conductive |
30 | |
40 |
| Conducting |
50 | High voltage |
60 |
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
A high-voltage direct-current power supply control system for a glass welding sample gap comprises a high-voltage direct-current power supply, a glass welding sample, copper foil, a conductive metal block, a workbench and a lead; the high-voltage direct-current power supply is used for providing high-voltage direct current, the glass welding sample is used for receiving high-voltage direct current, the conductive metal block is used for placing a lower layer of glass sample to be welded, the copper foil is used for being adhered to the upper surface of an upper layer of glass sample to be welded, and the lead is used for connecting the copper foil and the high-voltage direct-current power supply so that the glass sample to be welded is placed in a high-voltage direct-current electric field.
Referring to fig. 1, a schematic structural diagram of a high voltage dc power supply control method for a gap between glass samples to be welded according to an embodiment of the present invention is shown, including a glass sample to be welded 10, a conductive metal foil 20, a conductive metal fixing block 30, a welding point 40, a lead 50, and a high voltage dc power supply 60.
The two glass samples 10 to be welded are stacked together and placed on the conductive metal fixing block 30, the conductive metal foil 20 is tightly attached to the upper surface of the upper glass layer of the glass samples 10 to be welded, one end of the lead 50 is connected with the conductive metal fixing block 30 and the conductive metal foil 20 through the welding point 40, and the other end of the lead 50 is connected with the positive electrode and the negative electrode of the high-voltage direct-current power supply 60.
In addition, all the glass samples 10 to be welded were subjected to ultrasonic cleaning and nitrogen drying.
The upper surface of the conductive metal fixing block 30 is tightly attached to the lower surface of the lower glass of the glass sample 10 to be welded, and the conductive metal foil 20 is tightly attached to the upper surface of the upper glass of the glass sample 10 to be welded.
Further, the other end of the wire 50 having one end connected to the conductive metal fixing block 30 is connected to the negative electrode of the high voltage dc power supply 60, and the other end of the wire 50 having one end connected to the conductive metal foil 20 is connected to the positive electrode of the high voltage dc power supply 60.
In the present embodiment, the conductive metal fixing block 30 is an iron block, and the conductive metal foil 20 is a conductive copper foil having a thickness of 0.5 mm.
It should be noted that the lead wire 50 may be soldered to the conductive metal fixing block 30 and the conductive metal foil 20 by a conventional soldering method, and the high voltage dc power supply 60 may be turned on to control the gap between the glass samples 10 to be soldered after the connection is completed.
In summary, the method for controlling the gap between the samples of the welded glass according to the embodiments of the present invention provides a method for providing a high-intensity electric field by using a high-voltage dc power source for the first time, wherein the voltage intensity output by the high-voltage dc power source is continuously controllable by a pressure control knob, the pressing time can be accurately controlled by controlling the power switch to be closed, and the gap between the glass to be welded can be flexibly, conveniently and accurately controlled by combining the voltage intensity and the pressing time.
Referring to fig. 2 to 3, a theoretical principle analysis of feasibility of the embodiment of the present invention is shown.
The high voltage dc power supply 60 outputs a stable dc voltage of several kv or more than several tens of thousands of volts, and is connected to the conductive metal fixing block (anode) 30, and an electric field is generated between it and the conductive metal foil (cathode) 20, as shown in fig. 1. The original randomly distributed positive and negative ions inside the glass body are shown in fig. 2 and form regular arrangement under the action of a strong electric field, as shown in fig. 3. The connection mode that the conductive metal foil 20 and the conductive metal fixing block 30 are in direct contact with the upper and lower glass blocks to be welded can accelerate the regular distribution of positive and negative ions in the glass.
The ordinary silicate glass has ion conductivity, ions are used as an electric carrier, and under the action of an external electric field, the probability that the electric carrier is brought into the direction of the electric field from original non-directional thermal motion is increased, and the electric carrier is converted into directional movement to show conductivity. The carrier is usually a cation in the glass, especially an alkali metal ion (such as Na) having the highest mobility in the glass+、K+). At normal temperature, the anion group in the glass, which is a silica skeleton or a boroxide skeleton, has almost no ability to move under the action of an external electric field. When the temperature rises above the softening temperature of the glass, anions in the glass begin to participate in the transmission of current, and the number of alkali ions and anions participating in the transmission of current gradually increases with the rise of the temperature.
Under the action of a strong electric field, disordered anions and cations in the two pieces of glass are regularly arranged, strong attraction is generated between the anions and the cations, the physical distance between the two pieces of glass is shortened, and the two pieces of glass can reach the welding distance along with the lapse of time.
And judging the bonding distance between the two pieces of glass according to the stage number of the interference fringes with the equal thickness. When the two pieces of cleaned glass are naturally attached together, the gap is larger than 3 microns and cannot present interference fringes with the same thickness, the gap between the two pieces of glass is gradually shortened along with continuous pressurization of a high-voltage power supply, and when the gap reaches 6 times of a quarter wave band (600 nm-1200 nm), the surface of the upper layer of glass presents color interference fringes under the irradiation of visible light. The high-voltage power supply continuously pressurizes, the color interference fringes expand outwards, the interference level is gradually reduced, the glass gap is continuously reduced, zero-order interference fringes appear, the glass gap is in a quarter wave band, the weldable gap is achieved, the zero-order interference fringe area is gradually enlarged, van der Waals force begins to appear between the two pieces of glass, and the glass is attached more tightly. The laser is focused on the area, and the welding of the two pieces of glass is realized by adjusting proper parameters.
The pasting shape of the copper foil 20 is designed according to different welding requirements. Because air is discharged in the process that the gap between the two pieces of glass is gradually shortened under the action of the high-voltage electric field, the pasting shape of the copper foil is not closed, the invention designs and uses any one pasting shape as shown in figure 4, and in the specific implementation process, the pasting shape can be a figure, can also be a cyclic repetition of a figure, and can also be a combined overlapping repetition of a plurality of figures as shown in figure 5.
Further, the conductive copper foil 20 may be any one of an aluminum foil and an iron foil, which is a metal conductive foil having excellent conductivity and capable of being bonded to a glass surface, or may be replaced with an electrode-plated one.
Further, the pasting shape of the conductive foil 20 may be a cross shape, a circular spiral shape, a square spiral shape, a U shape, a single pattern, a cycle repetition of one shape, or a combination and superposition repetition of a plurality of shapes.
For the shape of the conductive metal fixing block 30 attached to the lower glass layer in the embodiment, the central area of the conductive metal block needs to be hollowed out according to the welding requirement, and the shape is designed as shown in fig. 6. The pattern can be a single pattern, can be a repetition of one pattern, and can be a combination superposition repetition of a plurality of patterns. The conductive metal fixing block is used for bearing a glass sample, and the surface of the metal block is ensured to be tightly attached to the lower surface of the lower layer of glass, so that the area of a conductive area is large, and the regular arrangement of positive and negative ions in the glass is accelerated.
Further, the conductive metal fixing block 30 may be any one of a copper block, a stainless steel block, and an iron block having a good conductive property.
Further, the conductive metal fixing block 30 is hollow, and the hollow shape may be circular or rectangular, may be one shape, may be repeated in one shape, or may be a combination of multiple shapes and overlapping repeated.
Fig. 8 is a flow chart illustrating a process of reducing a glass gap by a high voltage dc power supply according to an embodiment of the present invention, in which the method of reducing a glass sample gap by a high voltage dc power supply is applied to an ultrafast laser welding glass process, and the method includes steps S01 to S03:
and step S01, cleaning the glass sample in an ultrasonic cleaning machine, drying the glass sample by using nitrogen, and stacking the glass sample in a high-voltage direct-current power supply control system.
When the method is specifically implemented, the conductive metal foil with the proper shape is attached according to the process requirement of laser welding glass, and the glass is placed on the conductive metal fixing block.
And step S02, adjusting the voltage intensity of the high-voltage direct-current power supply and controlling the pressurizing time, reducing the gap between the two pieces of glass, and judging the size of the gap between the two pieces of glass according to the equal-thickness interference fringes.
In the specific implementation, the electric field intensity of the high-voltage direct-current power supply is adjusted to be not lower than 1kV, the pressurizing time is not shorter than 5 minutes, and under the irradiation of natural light, colored interference fringes with the same thickness are observed on the upper surface of the upper layer of glass.
It should be noted that insulation protection is paid attention to when the high voltage direct current power supply is operated.
In addition, before turning on high voltage power supply, need detect the cleanliness factor on glass sample surface, guarantee that two glasses can laminate closely.
And step S03, after the weldable gap is reached, the laser is turned on to weld the two pieces of glass, and the high-voltage direct-current power supply is turned off or continuously pressurized for follow-up research.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is 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, many variations and modifications can be made without departing from the spirit of the invention, which falls within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for reducing the gap between two glass samples by using a high-voltage direct-current power supply is characterized in that the two glass samples are mutually stacked, an upper conductive material and a lower conductive material are respectively placed on the upper surface and the lower surface of the two stacked glass samples, the upper conductive material and the lower conductive material are respectively connected with the positive end and the negative end of the high-voltage direct-current power supply through conducting wires, so that the glass samples are placed in a high-voltage direct-current electric field, and the gap between the two glasses is shortened by controlling the electrostatic attraction of positive ions and negative ions in the glass by using a strong-field electric field generated by the high-voltage direct-current power supply.
2. The method of claim 1, wherein the output voltage of the high voltage dc power supply is not less than 1 kV.
3. The method for reducing the gap between glass welding samples by using a high voltage direct current power supply according to claim 1, wherein the glass samples to be welded are placed in the high voltage direct current electric field for at least 5 minutes.
4. Use of a method according to any of claims 1 to 3 for reducing the gap between glass samples using a high voltage dc power supply in a welding process.
5. The use in a soldering process according to claim 4, wherein the upper conductive material is adhered to the upper surface of the glass coupon and is in an unclosed shape.
6. The application of the welding process as claimed in claim 5, wherein the upper conductive material is a metal conductive foil which can be bonded to the surface of the glass with good conductivity, such as conductive copper foil, conductive aluminum foil, or conductive iron foil, and can be replaced by plating electrodes.
7. The application of the welding process as claimed in claim 5, wherein the non-closed shape is a cross shape, a circular spiral shape, a square spiral shape, a U-shaped shape, a single pattern, a cyclic repetition of one shape, or a combined overlapping repetition of a plurality of shapes.
8. The use of claim 4, wherein the lower conductive material is partially hollowed out to allow transmission of the welding laser.
9. Use in a soldering process according to claim 4 or 8, wherein the lower conductive material is a conductive metal block.
10. The application of the welding process as claimed in claim 9, wherein the conductive metal block is any one of a copper block, a stainless steel block and an iron block with good conductive performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111559745.8A CN114538798A (en) | 2021-12-20 | 2021-12-20 | Method for reducing gap of glass sample by using high-voltage direct-current power supply and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111559745.8A CN114538798A (en) | 2021-12-20 | 2021-12-20 | Method for reducing gap of glass sample by using high-voltage direct-current power supply and application thereof |
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| CN114538798A true CN114538798A (en) | 2022-05-27 |
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| CN202111559745.8A Withdrawn CN114538798A (en) | 2021-12-20 | 2021-12-20 | Method for reducing gap of glass sample by using high-voltage direct-current power supply and application thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4066427A (en) * | 1974-05-20 | 1978-01-03 | Tokyo Shibaura Electric Co., Ltd. | Bonding method using a soldering glass |
| JP2004210565A (en) * | 2002-12-27 | 2004-07-29 | Canon Inc | Bubble-free anodic joining method |
| WO2014182776A1 (en) * | 2013-05-10 | 2014-11-13 | Corning Incorporated | Laser welding transparent glass sheets using low melting glass or thin absorbing films |
| CN105702882A (en) * | 2016-01-29 | 2016-06-22 | 深圳市华星光电技术有限公司 | A packaging assembly and a packaging method thereof |
| CN107406292A (en) * | 2014-10-31 | 2017-11-28 | 康宁股份有限公司 | The glass-encapsulated and manufacture method of laser welding |
| CN109702343A (en) * | 2019-01-22 | 2019-05-03 | 华南师范大学 | The controllable laser compound welding device and method of the transparency of a kind of pair of glass |
-
2021
- 2021-12-20 CN CN202111559745.8A patent/CN114538798A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4066427A (en) * | 1974-05-20 | 1978-01-03 | Tokyo Shibaura Electric Co., Ltd. | Bonding method using a soldering glass |
| JP2004210565A (en) * | 2002-12-27 | 2004-07-29 | Canon Inc | Bubble-free anodic joining method |
| WO2014182776A1 (en) * | 2013-05-10 | 2014-11-13 | Corning Incorporated | Laser welding transparent glass sheets using low melting glass or thin absorbing films |
| CN107406292A (en) * | 2014-10-31 | 2017-11-28 | 康宁股份有限公司 | The glass-encapsulated and manufacture method of laser welding |
| CN105702882A (en) * | 2016-01-29 | 2016-06-22 | 深圳市华星光电技术有限公司 | A packaging assembly and a packaging method thereof |
| CN109702343A (en) * | 2019-01-22 | 2019-05-03 | 华南师范大学 | The controllable laser compound welding device and method of the transparency of a kind of pair of glass |
Non-Patent Citations (1)
| Title |
|---|
| 张红美等, 北京邮电大学出版社 * |
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