Laser drilling equipment for glass plates

Abstract

The invention provides laser drilling equipment for a glass plate. The laser drilling equipment comprises a rack; the cleaning tank is adjustably arranged on the rack, and an ultrasonic generator is arranged on the outer side of the bottom of the cleaning tank; the jig assembly is adjustably arranged on the rack, at least part of the jig assembly extends into the cleaning tank, and the glass plate is assembled on the jig assembly and located in the cleaning tank; the spray head assembly is adjustably arranged in the cleaning tank or the jig assembly and comprises a spray head body, a light guide hole is formed in the spray head body in a penetrating mode, a light transmitting plate is arranged in the light guide hole and used for dividing the light guide hole into a dry area close to the light inlet end and a wet area close to the light outlet end, and a water spraying opening is formed in the inner wall of the light guide hole. The water injection nozzle is located in the wet area; the laser assembly is used for generating a laser beam, and the laser beam can be transmitted from the dry area to the wet area to the glass plate. When the glass plate is punched, the hole forming quality is better, cracks are fewer, and the defects such as slag overturning and a recast layer can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of glass processing, and in particular to a laser drilling device for glass plates. Background Art

[0002] Glass is a brittle material, and traditional mechanical drilling methods have multiple drawbacks. Currently, laser processing is increasingly being used to replace traditional machining. Nanosecond short-pulse lasers offer low cost and high material removal rates. However, when using nanosecond lasers for glass drilling, problems such as slag, recast layers, and cracks are common at the hole opening and walls. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the purpose of the present invention is to provide a laser drilling equipment for glass plates, which, compared with traditional nanosecond laser drilling equipment, has better hole quality, fewer cracks and smoother hole walls, and can effectively avoid the occurrence of defects such as slag and recast layer.

[0004] The embodiments of the present invention are achieved through the following technical solutions:

[0005] A laser drilling device for a glass plate comprises: a frame; a cleaning tank adjustably arranged on the frame, an ultrasonic generator being configured on the outer side of the bottom of the cleaning tank; a jig assembly adjustably arranged on the frame, at least partially extending into the cleaning tank, a glass plate being assembled on the jig assembly and located in the cleaning tank; a nozzle assembly adjustably arranged in the cleaning tank or the jig assembly, the nozzle assembly comprising a nozzle body, a light guide hole being provided through the nozzle body, a light-transmitting plate being configured in the light guide hole for dividing the light guide hole into a dry area near the light input end and a wet area near the light output end, a water spray port being configured on the inner wall of the light guide hole, the water spray port being located in the wet area; and a laser assembly for generating a laser beam, wherein the laser beam can be transmitted from the dry area to the wet area to the glass plate.

[0006] According to a preferred embodiment, the nozzle body includes a main body and a lower cover plate connected to each other, the light-transmitting plate is assembled on the main body, and in the transmission direction of the laser beam, the lower cover plate is located downstream of the light-transmitting plate; the light guide hole includes a first hole section arranged on the main body and a second hole section arranged on the lower cover plate; a guide ring groove is provided around the first hole section on the end surface of the main body facing the lower cover plate, and a water inlet hole connected to the guide ring groove is provided on the side wall of the main body; in the direction close to the light guide hole, a water spray gap is provided between the lower cover plate and the main body, and the water spray gap constitutes the water spray outlet.

[0007] According to a preferred embodiment, the inner diameter of the second hole section is smaller than the inner diameter of the first hole section.

[0008] According to a preferred embodiment, a first assembly step and a second assembly step are provided on the inner wall of the first hole section, and the second assembly step is closer to the lower cover plate than the first assembly step; the light-transmitting plate is overlapped on the second assembly step, and a press-fitting ring is installed on the first assembly step, and the press-fitting ring abuts against the light-transmitting plate.

[0009] According to a preferred embodiment, the light-transmitting plate is made of sapphire.

[0010] According to a preferred embodiment, the nozzle assembly further includes a nozzle adjustment plate and a nozzle connecting plate, wherein a connecting block is arranged on the main body, the nozzle connecting plate is connected to the main body through the connecting block, and the nozzle connecting plate is adjustably assembled to the nozzle adjustment plate; the transmission direction of the laser beam is defined as a first direction, the adjustment direction of the nozzle connecting plate relative to the nozzle adjustment plate is a second direction, and the adjustment direction of the nozzle adjustment plate relative to the jig assembly is a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0011] According to a preferred embodiment, a first through hole is provided on the nozzle adjustment plate, and a second through hole is provided on the nozzle connection plate. The laser beam passes through the first through hole and the second through hole in sequence and then enters the light guide hole.

[0012] According to a preferred embodiment, the fixture assembly includes an extension plate and a bracket connected to each other, the bracket extends into the cleaning tank, and an assembly plate is arranged on the bracket, and the glass plate is assembled on the assembly plate.

[0013] According to a preferred embodiment, the laser drilling equipment for glass plates also includes a support plate, the cleaning tank is fixedly installed on the support plate through a tank frame, the support plate is equipped with a driving member and a fixed plate, the extension plate is provided with a dynamic plate and a driving rod, the driving member acts on the driving rod, and the dynamic plate is slidably connected to the fixed plate.

[0014] According to a preferred embodiment, a marble slab is provided on the top of the frame, and two marble columns are provided on the upper side of the marble slab. The two marble columns are connected by a marble top plate to form a gantry structure, and the laser assembly is assembled on the gantry structure.

[0015] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0016] The present invention uses a water-guided laser to perform drilling processing on a glass plate, thereby achieving cooling of the glass plate. At the same time, the glass plate is placed in a cleaning tank, and the water in the cleaning tank forms cavitation effects and acoustic flow fields under the action of an ultrasonic generator. The shock waves generated by the oscillation of the cavitation bubbles and the jets when they collapse can clean the hole walls and the surface of the glass plate formed by the laser beam cutting, thereby removing the slag in the hole and preventing splashes generated in the water due to drilling from being re-deposited on the hole walls and the hole openings. Furthermore, the acoustic flow fields formed on the surface of the glass plate and near the cavitation bubbles accelerate the convection of the water, further increasing the cooling rate of the glass plate, thereby facilitating reducing the probability of a recast layer forming on the hole walls. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a laser drilling device for a glass plate provided in an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the assembly structure of a cleaning tank, a fixture assembly, and a nozzle assembly provided in an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the assembly structure of a cleaning tank and an ultrasonic generator provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the three-dimensional structure of a nozzle assembly provided in an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of the exploded structure of a nozzle assembly provided in an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of a top view of the nozzle assembly provided by an embodiment of the present invention with the straight rod handle removed;

[0024] Figure 7 for Figure 6 Cross-sectional view of section AA;

[0025] Figure 8 for Figure 7 A partial enlarged schematic diagram of the structure at point B in the middle.

[0026] Icons: 1. Rack; 11. Marble slab; 111. Marble column; 112. Marble top plate; 2. Cleaning tank; 21. Tank rack; 3. Fixture assembly; 31. Extension plate; 32. Bracket; 33. Assembly plate; 34. Driving rod; 35. Dynamic vertical plate; 36. Fixed vertical plate; 37. Driving member; 4. Nozzle assembly; 401. Guide ring groove; 402. Water inlet hole; 403. Water spray gap; 41. Nozzle body; 41a. Main body; 41b. Lower cover plate; 410. Light guide hole; 410a. First hole section; 410b. Second Hole section; 4101, first assembly step; 4102, second assembly step; 411, water inlet block; 4110, series groove; 412, adapter; 413, connecting block; 414, light-transmitting plate; 415, press-fit ring; 42, nozzle connecting plate; 421, second through hole; 43, nozzle adjustment plate; 431, first through hole; 44, straight rod handle; 5, laser assembly; 6, ultrasonic generator; 7, support plate; 8, adjustment assembly; 9, laser beam; a, dry area; b, wet area; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0027] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] Please refer to Figures 1 to 8A laser drilling device for a glass plate includes a frame 1, a cleaning tank 2, a jig assembly 3, a nozzle assembly 4 and a laser assembly 5, wherein: the cleaning tank 2 is adjustably arranged on the frame 1, and an ultrasonic generator 6 is arranged on the outer side of the bottom of the cleaning tank 2; the jig assembly 3 is adjustably arranged on the frame 1, and at least a portion of it extends into the cleaning tank 2, and a glass plate (not shown in the figure) is assembled on the jig assembly 3 and is located in the cleaning tank 2; the nozzle assembly 4 is adjustably arranged in the cleaning tank 2 or the jig assembly 3, and the nozzle assembly 4 includes a nozzle body 41, and a light guide hole 410 is formed through the nozzle body 41. A light-transmitting plate 414 is arranged in the light guide hole 410, which is used to separate the light guide hole 410 into a dry area a near the light inlet end and a wet area b near the light outlet end. A water spray port is arranged on the inner wall of the light guide hole 410, and the water spray port is located in the wet area b; the laser assembly 5 is used to generate a laser beam 9, and the laser beam 9 can be transmitted from the dry area a to the wet area b to the glass plate. During use, the water nozzle is connected to an external water source (not shown in the figure) so that the nozzle can continuously supply water flow, forming a light-guiding water flow along the transmission path of the laser beam 9 between the wet area b and the glass sheet, thereby achieving water-guided transmission of the laser beam 9. The laser beam 9 used here is a nanosecond laser. Using a water-guided laser to perform hole drilling on the glass sheet can achieve cooling of the glass sheet. While the glass sheet is in the cleaning tank 2, the water in the cleaning tank 2, under the action of the ultrasonic generator 6, creates cavitation effects and acoustic flow fields. The shock waves generated by the oscillation of the cavitation bubbles and the jets when they collapse can clean the hole walls and surface of the glass sheet cut by the laser beam 9, remove slag in the hole, and prevent splashes generated by drilling from re-depositing on the hole walls and hole openings. The acoustic flow fields formed on the surface of the glass sheet and near the cavitation bubbles accelerate water convection, further increasing the cooling rate of the glass sheet and helping to reduce the probability of a recast layer forming on the hole walls. Compared with traditional nanosecond laser drilling equipment, the solution provided in this embodiment has better hole quality, fewer cracks and smoother hole walls, and can effectively avoid the occurrence of defects such as slag and recast layer.

[0031] The nozzle body 41 includes a main body portion 41a and a lower cover plate 41b that are connected to each other. A light-transmitting plate 414 is assembled on the main body portion 41a. In the transmission direction of the laser beam 9, the lower cover plate 41b is located downstream of the light-transmitting plate 414. The light-guiding hole 410 includes a first hole section 410a provided on the main body portion 41a and a second hole section 410b provided on the lower cover plate 41b. A guide ring groove 401 is provided around the first hole section 410a on the end surface of the main body portion 41a facing the lower cover plate 41b. A water inlet 402 connected to the guide ring groove 401 is provided on the side wall of the main body portion 41a. In the direction close to the light-guiding hole 410, a water-spraying gap 403 is provided between the lower cover plate 41b and the main body portion 41a. The guide ring groove 401 is connected to the first hole section 410a and the second hole section 410b through the water-spraying gap 403. The water-spraying gap 403 constitutes a water-spraying port. Figure 7 and Figure 8 As shown, the laser beam 9 is transmitted in a first direction X. The lower cover plate 41b is removably mounted to the lower end surface of the main body 41a via screws. The guide ring groove 401 is blocked and limited by the lower cover plate 41b, forming a hollow cavity. During use, the water inlet 402 is connected to an external water source to deliver water into the guide ring groove 401. Water is then accelerated through the water spray gap 403 toward the light guide hole 410, namely the first hole segment 410a and the second hole segment 410b, forming a light-guiding water flow. This guides the laser beam 9 while also cooling the light-transmitting plate 414, thereby extending the service life of the device.

[0032] There are multiple water inlet holes 402, and the multiple water inlet holes 402 are arranged at intervals around the circumference of the main body 41a.

[0033] In this embodiment, the inner diameter of the second hole segment 410b is smaller than that of the first hole segment 410a. In this embodiment, the first hole segment 410a is a stepped hole, and the inner diameter of the second hole segment 410b is smaller than the minimum inner diameter of the first hole segment 410a. This allows the water flow, after exiting the water spray gap 403, to flow toward the center of the light guide hole 410 under the guidance of the lower cover plate 41b, thereby promoting the formation of a light-guiding water flow.

[0034] Optionally, the light guide hole 410 is a square hole or a round hole.

[0035] like Figure 8 As shown, the inner wall of the first hole section 410a is provided with a first assembly step 4101 and a second assembly step 4102. The second assembly step 4102 is closer to the lower cover plate 41b than the first assembly step 4101. The light-transmitting plate 414 overlaps the second assembly step 4102. A press-fit ring 415 is mounted on the first assembly step 4101 and abuts against the light-transmitting plate 414. In this embodiment, the press-fit ring 415 is removably mounted on the first assembly step 4101 using screws or bolts to secure the light-transmitting plate 414 to the second assembly step 4102. Optionally, the light-transmitting plate 414 is made of sapphire.

[0036] like Figure 5 and Figure 8 As shown, the main body 41a is hollow and rectangular, with water inlets 402 formed on each of its four sides. Each of the four sides is fitted with a water inlet block 411, which is fitted with an adapter 412. Specifically, a series groove 4110 is formed on the side of the water inlet block 411 facing the main body 41a. The series groove 4110 is used to connect all water inlets 402 on the same side of the main body 41a in series. During use, a water source is connected to the adapter 412 via a water pipe (not shown). The adapter 412 then connects to the series groove 4110, simultaneously supplying water to all water inlets 402 connected in series by the series groove 4110.

[0037] like Figures 4 to 7 As shown, the nozzle assembly 4 also includes a nozzle adjustment plate 43 and a nozzle connecting plate 42, wherein a connecting block 413 is provided on the main body 41a, the nozzle connecting plate 42 is connected to the main body 41a via the connecting block 413, and the nozzle connecting plate 42 is adjustably assembled to the nozzle adjustment plate 43 via a slide rail slider assembly. In this embodiment, optionally, the nozzle adjustment plate 43 is slidably connected to the fixture assembly 3 via a slide rail slider assembly. The adjustment direction of the nozzle connecting plate 42 relative to the nozzle adjustment plate 43 is defined as the second direction Y, and the adjustment direction of the nozzle adjustment plate 43 relative to the fixture assembly 3 is defined as the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other. In this embodiment, as Figure 5 As shown, the nozzle adjustment plate 43 is provided with a first through-hole 431, and the nozzle connection plate 42 is provided with a second through-hole 421. The laser beam 9 passes through the first through-hole 431 and the second through-hole 421 in sequence before entering the light guide hole 410. This arrangement facilitates the adjustment of the spatial position of the nozzle assembly 4 to adapt to the spatial positions of the fixture assembly 3 and the laser assembly 5.

[0038] In some embodiments, the nozzle connecting plate 42 and the nozzle adjustment plate 43 are each equipped with a straight rod handle 44 for engaging the nozzle adjustment plate 43 and the fixture assembly 3 to correspondingly lock the nozzle connecting plate 42 and the nozzle adjustment plate 43. In other embodiments, the nozzle connecting plate 42 and the nozzle adjustment plate 43 may also be driven by a cylinder or an electric push rod.

[0039] like Figure 2 As shown, the jig assembly 3 includes an extension plate 31 and a bracket 32 that are interconnected. The bracket 32 extends into the cleaning tank 2. An assembly plate 33 is provided on the bracket 32. The glass plate is assembled on the assembly plate 33. The laser drilling device for glass plates also includes a pallet 7. The cleaning tank 2 is fixedly mounted on the pallet 7 through the tank frame 21. The pallet 7 is equipped with a driving member 37 and a fixed plate 36. A dynamic plate 35 and a driving rod 34 are provided on the extension plate 31. The driving member 37 acts on the driving rod 34, and the dynamic plate 35 is slidably connected to the fixed plate 36. Optionally, the driving member 37 is a cylinder for driving the jig assembly 3 to move longitudinally through the driving rod 34. It should be noted that the longitudinal direction here is parallel to the first direction X mentioned above. The cleaning tank 2 and the jig assembly 3 are mounted on the frame 1 through the pallet 7.

[0040] Optionally, a negative pressure hole is provided on the mounting plate 33, and the glass sheet is fixed to the mounting plate 33 by negative pressure adsorption. In another embodiment, the glass sheet can also be positioned on the mounting plate 33 by conventional mechanical press-fitting, such as by tightening and securing with set screws provided on the mounting plate 33. This is a prior art and will not be described in detail here.

[0041] In this embodiment, the nozzle adjustment plate 43 is slidably mounted on the extension plate 31 via a slide rail and slider assembly.

[0042] like Figure 1 and Figure 2 As shown, a marble slab 11 is disposed on the top of the frame 1, and two marble columns 111 are disposed on the upper side of the marble slab 11. The two marble columns 111 are connected by a marble top plate 112 to form a gantry structure, and the laser assembly 5 is assembled on the gantry structure.

[0043] Furthermore, the laser drilling equipment for glass plates also includes an adjustment component 8, which is installed between the marble slab 11 and the support plate 7, and is used to adjust the spatial position of the support plate 7 in the second direction Y and the third direction Z, thereby realizing the adjustable spatial position of the cleaning tank 2 and the jig assembly 3 relative to the frame 1.

[0044] Optionally, the adjustment component 8 is a cross sliding platform.

[0045] Laser assembly 5 includes a nanosecond laser and a galvanometer lens, which are used to generate nanosecond laser light to form laser beam 9 for drilling. In this embodiment, the galvanometer lens is mounted on a marble top plate 112. During operation, the adjustment assembly 8 adjusts the cleaning tank 2 and the fixture assembly 3, thereby adjusting the position of the glass sheet to match the spatial position of the galvanometer lens.

[0046] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A laser drilling device for glass plates, characterized in that: include: frame; A cleaning tank is adjustably arranged on the frame, and an ultrasonic generator is configured on the outer side of the bottom of the cleaning tank; a jig assembly adjustably mounted on the frame, at least partially extending into the cleaning tank, wherein the glass plate is mounted on the jig assembly and positioned in the cleaning tank; a nozzle assembly adjustably disposed in the cleaning tank or the fixture assembly, the nozzle assembly comprising a nozzle body, a light guide hole being provided through the nozzle body, a light-transmitting plate being disposed within the light guide hole for dividing the light guide hole into a dry area near the light inlet end and a wet area near the light outlet end, a water spray port being disposed on an inner wall of the light guide hole, the water spray port being located within the wet area; and A laser assembly is used to generate a laser beam, wherein the laser beam can be transmitted from the dry area to the wet area to the glass sheet.

2. The laser drilling equipment for glass plates according to claim 1, characterized in that: The nozzle body includes a main body portion and a lower cover plate connected to each other, the light-transmitting plate is assembled on the main body portion, and in the transmission direction of the laser beam, the lower cover plate is located downstream of the light-transmitting plate; The light guide hole includes a first hole section provided on the main body and a second hole section provided on the lower cover plate; A guide ring groove is formed on the end surface of the main body facing the lower cover plate around the first hole section, and a water inlet hole connected to the guide ring groove is formed on the side wall of the main body; In a direction close to the light guide hole, a water spray gap is provided between the lower cover plate and the main body, and the water spray gap constitutes the water spray port.

3. The laser drilling equipment for glass plates according to claim 2, characterized in that: The inner diameter of the second hole section is smaller than the inner diameter of the first hole section.

4. The laser drilling equipment for glass plates according to claim 2, characterized in that: A first assembly step and a second assembly step are formed on the inner wall of the first hole section, and the second assembly step is closer to the lower cover plate than the first assembly step; The light-transmitting plate is overlapped on the second assembly step. A press ring is assembled on the first assembly step, and the press ring abuts against the light-transmitting plate.

5. The laser drilling equipment for glass plates according to claim 1, characterized in that: The light-transmitting plate is made of sapphire.

6. The laser drilling equipment for glass plates according to claim 2, characterized in that: The nozzle assembly further includes a nozzle adjustment plate and a nozzle connection plate, wherein the main body is provided with a connection block, the nozzle connection plate is connected to the main body via the connection block, and the nozzle connection plate is adjustably assembled to the nozzle adjustment plate; The transmission direction of the laser beam is defined as a first direction, the adjustment direction of the nozzle connecting plate relative to the nozzle adjustment plate is defined as a second direction, and the adjustment direction of the nozzle adjustment plate relative to the fixture assembly is defined as a third direction. The first direction, the second direction and the third direction are perpendicular to each other.

7. The laser drilling equipment for glass plates according to claim 6, characterized in that: A first through hole is provided on the nozzle adjustment plate, and a second through hole is provided on the nozzle connection plate. The laser beam passes through the first through hole and the second through hole in sequence and then enters the light guide hole.

8. The laser drilling equipment for glass plates according to claim 1, characterized in that: The fixture assembly includes an extension plate and a bracket that are connected to each other. The bracket extends into the cleaning tank. An assembly plate is arranged on the bracket, and the glass plate is assembled on the assembly plate.

9. The laser drilling equipment for glass plates according to claim 8, characterized in that: The laser drilling equipment for glass plates also includes a support plate, the cleaning tank is fixedly installed on the support plate through a tank frame, the support plate is equipped with a driving member and a fixed plate, the extension plate is provided with a dynamic plate and a driving rod, the driving member acts on the driving rod, and the dynamic plate is slidably connected to the fixed plate.

10. The laser drilling equipment for glass plates according to claim 1, characterized in that: A marble plate is disposed on the top of the frame, and two marble columns are disposed on the upper side of the marble plate. The two marble columns are connected by a marble top plate to form a gantry structure, and the laser assembly is assembled on the gantry structure.

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