Positioning fixture and method for laser cutting of lens glass

Abstract

The application relates to the technical field of glass laser cutting, in particular to a positioning clamp and method for lens glass laser cutting. The inner side of a water container is slidably connected with an outer sliding frame. The outer side of the outer sliding frame is fixedly connected with a sealing ring. The sealing ring is slidably connected with the water container and realizes sealing. The inner side of the outer sliding frame is provided with window glass. The water container, the outer sliding frame and the window glass form a water chamber. The inner side of the water container is fixedly connected with a support seat. The inner side of the water container is fixedly connected with a first spacing plate. The side of the window glass, which faces the inner side of the water container, is fixedly connected with a second spacing plate. The application can not only fill water with a fixed thickness in the frosted glass to reduce the diffuse reflection and refraction of laser, but also can keep the free liquid surface in the water chamber away from the cutting surface of the frosted glass, that is, the frosted glass is completely immersed in water, so that the free liquid surface is kept away from the cutting process, and the water ripple generated by the free liquid surface does not affect the laser cutting of the frosted glass.

Description

Technical Field

[0001] This invention relates to the field of glass laser cutting technology, specifically to a positioning fixture and method for laser cutting of lens glass. Background Technology

[0002] When it comes to laser cutting frosted glass, because there are many pits on the surface of frosted glass, some of the laser light incident along the surface of the frosted glass will be randomly refracted in different directions, and some of the laser light will be reflected, which will reduce the power density along the thickness direction.

[0003] Because the uneven surface of frosted glass causes diffuse reflection and irregular refraction of laser light, slight miscontrol of the laser processing can lead to deviation of the separation trajectory. This invention proposes a solution: covering the surface of frosted glass with a liquid medium—water, whose refractive index is closer to that of frosted glass (compared to air). By utilizing the characteristics of water's high fluidity, high transmittance, and non-polluting properties, the pits on the frosted glass surface are filled, making the surface smooth and achieving the effect of reducing or eliminating random scattering and refraction effects, thereby improving the formation conditions of incident laser light in frosted glass.

[0004] However, in cutting frosted glass using the above method, it is necessary to strictly control the water depth, that is, the distance from the water surface at the laser emitter end to the surface of the frosted glass. The water depth needs to be approximately 200 micrometers.

[0005] Therefore, a positioning fixture and method for laser cutting of lens glass are proposed to address the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a positioning fixture and method for laser cutting of lens glass, which can firmly lock the distance between the water surface of the laser emitter and the surface of the frosted glass at 200 micrometers and eliminate interference factors such as air bubbles in the water that affect laser welding.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a positioning fixture for laser cutting of lens glass, comprising a water container and a laser cutting head, wherein an outer sliding frame is slidably connected to the inner side of the water container, and a sealing ring is fixedly connected to the outer side of the outer sliding frame, the sealing ring being slidably connected to the water container and achieving a seal, and a window glass is installed on the inner side of the outer sliding frame, and a water chamber is formed between the water container, the outer sliding frame and the window glass. A support base is fixedly connected to the inside of the water container, a first partition plate is fixedly connected to the inside of the water container, a second partition plate is fixedly connected to the side of the window glass facing the inside of the water container, and frosted glass can be placed between the first partition plate and the second partition plate and at the top of the support base. When the outer sliding frame moves inward into the water container, the first and second partition plates clamp the frosted glass. At this time, the water depth on both sides of the frosted glass is the thickness of the first and second partition plates, thus achieving precise control of the water depth on the frosted glass surface. The laser cutting head cuts the glass on one side of the window glass using a laser. The window glass is designed to allow 1064 nm wavelength laser light to pass through and to enclose the water. The laser cutting head uses a picosecond laser, a continuous laser, or a combination of both as a light source.

[0008] A force sensor can be installed on the first partition plate to detect the clamping force of the frosted glass and prevent the frosted glass from breaking due to excessive pressure. Gaskets can be installed at the top pressure ends of the first and second partition plates; This invention not only fills the surface of frosted glass with a fixed thickness of water to reduce the diffuse reflection and refraction of the laser, but also keeps the free liquid surface in the water chamber away from the cutting surface of the frosted glass, that is, completely immerses the frosted glass in water, thereby keeping it away from the free liquid surface during the cutting process and avoiding the water ripples generated by the free liquid surface from affecting the laser cutting of the frosted glass.

[0009] To ensure the cutting effect of the laser, this invention can accurately control the depth of the water on both sides of the frosted glass to be cut. The method is as follows: the outer sliding frame moves inward to the water container so that the first partition plate and the second partition plate clamp the frosted glass. At this time, the water depth on both sides of the frosted glass is the thickness of the first partition plate and the second partition plate, thereby achieving precise control of the water depth on the surface of the frosted glass. In existing technologies, frosted glass is often placed horizontally for laser cutting. This invention places the frosted glass vertically in a vertically positioned water container. This serves two purposes: first, it allows air bubbles generated in the water during laser operation to move upwards without obstruction due to buoyancy, thus preventing air bubbles from affecting the laser welding process; second, during the cutting process, even after the glass breaks, it still has bottom support, thus avoiding the problem of stress deformation caused by gravity sinking during horizontal cutting, which leads to discontinuous cut surfaces.

[0010] As a preferred positioning fixture for laser cutting of lens glass according to the present invention, the four corners of the water container have rounded chamfers that match the outer sliding frame to increase sealing.

[0011] Continuous curved chamfers can give the sealing ring a continuous transition surface, avoiding sealing problems caused by uneven force at right angles; As a preferred positioning fixture for laser cutting of lens glass according to the present invention, the front end of the water container is slidably connected to a watertight plate with a handle. The watertight plate and the water container are disassembled and connected by a seal and friction. By pulling open the watertight plate, the frosted glass can be placed on the support between the first partition plate and the second partition plate.

[0012] In this invention, a pin-like mechanism can be provided between the watertight plate and the front end of the water container to effectively limit the watertight plate and ensure that it is installed in place. As a preferred positioning fixture for laser cutting of lens glass according to the present invention, the front end of the water container is fixedly connected with an inlet pipe and an outlet pipe with valves at the upper and lower positions respectively. The inlet pipe and the outlet pipe are connected to the water chamber, and the water in the water chamber is flowed and circulated through the inlet pipe and the outlet pipe.

[0013] As a preferred positioning fixture for laser cutting of lens glass according to the present invention, a sliding plate is slidably connected to the inner side of the top and bottom of the water container. A push plate is fixedly connected to the left side of the top of the sliding plate, and at least two connecting parts are fixedly connected to the right side of the top of the sliding plate. A top rod is fixedly connected to the left end of the connecting parts. The top rod is horizontally set and can move towards the inside of the water container, thereby pushing the outer sliding frame towards the inside of the water container through a top contact.

[0014] As a preferred positioning fixture for laser cutting of lens glass according to the present invention, a hydraulic cylinder is fixedly connected to the left end of the water container, and the output end of the hydraulic cylinder is fixedly connected to the push plate. The frosted glass is clamped by the pushing action of the hydraulic cylinder. The hydraulic cylinder includes an internally slidably connected piston and an inner rod. The piston and the inner rod are fixedly connected, and there is an oil cavity between the piston and the inner side of the hydraulic cylinder. When the oil in the oil cavity increases, the inner rod pushes the push plate.

[0015] As a preferred positioning fixture for laser cutting of lens glass according to the present invention, a distribution chamber is fixedly connected to the middle position of the left end of the water container. The inner sides of the upper and lower ends of the distribution chamber are connected to oil pump pipes, which extend into the inner side of the oil chamber of the corresponding oil cylinder. The inner side of the distribution chamber is connected to an oil inlet pipe.

[0016] As a preferred positioning fixture for laser cutting of lens glass according to the present invention, an extension rod is fixedly connected to the bottom end of the upper push plate and the bottom end of the lower push plate. A telescopic rod is rotatably connected between the two extension rods through a hinge. An inclination sensor is fixedly connected to the surface of the telescopic rod. When the upper and lower push plates move asynchronously, the telescopic rod will tilt and be detected by the inclination sensor.

[0017] Setting an extension rod can increase sensitivity. When the upper and lower push plates are not in sync, the longer the extension rod is set, the more the difference in horizontal position will be reflected in the angle deflection, and the more obvious the extension and retraction of the telescopic rod will be, thus increasing the adjustment sensitivity.

[0018] As a preferred positioning fixture for laser cutting of lens glass according to the present invention, a motor is fixedly connected to the left end of the distribution chamber. The output end of the motor extends into the inner side of the distribution chamber and is fixedly connected to a central disk. A rotating cylinder is fixedly connected to the outer side of the central disk. The rotating cylinder is rotatably connected to the inner side of the distribution chamber. Through holes are provided on the upper and lower sides of the rotating cylinder. The through holes are wedge-shaped. The through holes on the upper and lower sides block one side of the input end of the upper and lower oil pump pipes respectively. The through holes on the upper and lower sides are symmetrically arranged. When the motor rotates, the rotating cylinder rotates synchronously. The overlapping area of ​​the through hole on one side with the input end of the oil pump pipe on the same side increases, and the overlapping area of ​​the through hole on the other side with the input end of the oil pump pipe on the same side decreases, thereby changing the thrust of the upper and lower push plates and making the upper and lower sides of the outer sliding frame move synchronously.

[0019] Because the sealing ring has a certain compressibility, and because the bottom sealing ring needs to withstand greater water pressure, it may need to be made thicker and have greater friction. During the process of pushing the outer sliding frame, there is a possibility that the outer sliding frame may tilt up and down. In order to avoid the outer sliding frame tilting during the pushing process and affecting the laser cutting effect, this invention can realize the adaptive adjustment of hydraulic pressure to ensure that the outer sliding frames on both the upper and lower sides can be pushed synchronously. The oil inlet pipe is connected to the output end of the external oil pump. When the oil pump is working, the oil enters the oil cylinder through the distribution chamber, through hole, and pump oil pipe. The oil cylinder pushes the push plate, and the push rod pushes the outer sliding frame through the slide plate and connecting parts, so that the outer sliding frame clamps the frosted glass to be cut. During the clamping process, the angle of the rotating drum is adjusted with reference to the tilt sensor to keep the upper and lower sides of the outer slide frame moving synchronously. For example, when the tilt sensor tilts clockwise, the pushing speed on the upper surface is slower. At this time, the motor rotates counterclockwise, the overlapping area of ​​the upper through hole and the input end of the pump oil pipe on the same side increases, and the overlapping area of ​​the lower through hole and the input end of the pump oil pipe on the same side decreases, thereby changing the pushing force of the upper and lower push plates and keeping the upper and lower sides of the outer slide frame moving synchronously.

[0020] The steps for using a positioning fixture for laser cutting of lens glass are as follows: Step 1: Installation. Open the watertight plate, place the frosted glass into the support between the first and second partition plates, and then close the watertight plate again. Step 2: Clamping. Connect the oil inlet pipe to the output end of the external oil pump. When the oil pump is working, the oil cylinder pushes the push plate, and through the slide plate and connecting parts, the push rod pushes the outer slide frame, so that the outer slide frame clamps the frosted glass to be cut. During the clamping process, refer to the tilt sensor to adjust the angle of the rotating drum so that the upper and lower sides of the outer slide frame move synchronously. Step 3: Fill with water. Connect the inlet pipe to the external water supply pipe to fill the water chamber with water. The water level should exceed that of the inlet pipe. Step 4: Water circulation. Connect the inlet pipe to the input end of the external circulation pump and the outlet pipe to the output end of the external circulation pump to achieve water circulation during the cutting process. Step 5: Cut using a laser cutting head.

[0021] Compared with the prior art, the beneficial effects of the present invention are: 1. The positioning fixture for laser cutting of lens glass can not only fill the surface of frosted glass with water of a fixed thickness to reduce the diffuse reflection and refraction of the laser, but also keep the free liquid surface in the water chamber away from the cutting surface of the frosted glass, that is, completely immerse the frosted glass in water, thereby keeping it away from the free liquid surface during the cutting process and avoiding the water ripples caused by the free liquid surface from affecting the laser cutting of the frosted glass.

[0022] 2. The positioning fixture for laser cutting of lens glass, in order to ensure the cutting effect of the laser, can accurately control the depth of the water on both sides of the frosted glass to be cut. The method is as follows: the outer sliding frame moves inward to the water container so that the first partition plate and the second partition plate clamp the frosted glass. At this time, the water depth on both sides of the frosted glass is the thickness of the first partition plate and the second partition plate, thereby achieving precise control of the water depth on the surface of the frosted glass.

[0023] 3. The positioning fixture for laser cutting of lens glass, in the prior art, often places the frosted glass horizontally for laser cutting. The present invention places the frosted glass vertically in a vertically positioned water container. Firstly, this allows air bubbles generated in the water during laser operation to move upwards without obstruction under the action of buoyancy, thereby avoiding the presence of air bubbles affecting the laser welding process. Secondly, during the cutting process, even after the glass is split, it still has bottom support, thereby avoiding the problem of stress deformation caused by the glass sinking under gravity during horizontal cutting, which leads to discontinuous cut surfaces.

[0024] 4. This positioning fixture for laser cutting of lens glass has a certain compressibility of the sealing ring. Furthermore, the bottom sealing ring needs to withstand greater water pressure, requiring it to be thicker and resulting in greater friction. During the pushing process of the outer sliding frame, there is a possibility of the outer sliding frame tilting vertically. To prevent this tilting and its impact on the laser cutting effect, this invention enables adaptive hydraulic adjustment, ensuring that the upper and lower outer sliding frames are pushed synchronously. The oil inlet pipe is connected to the output end of an external oil pump. When the oil pump is working, oil enters the oil cylinder through the distribution chamber, through-hole, and pump oil pipe. The oil cylinder pushes the push plate, and through the sliding plate and connecting parts, the push rod pushes the outer sliding frame, clamping it onto the frosted glass to be cut.

[0025] 5. This positioning fixture for laser cutting of lens glass, during the clamping process, refers to the tilt sensor and adjusts the angle of the rotating drum to keep the upper and lower sides of the outer slide frame moving synchronously. For example, when the tilt sensor tilts clockwise, the pushing speed on the upper surface is slower. At this time, the motor rotates counterclockwise, the overlapping area of ​​the upper through hole and the input end of the pump oil pipe on the same side increases, and the overlapping area of ​​the lower through hole and the input end of the pump oil pipe on the same side decreases, thereby changing the pushing force of the upper and lower push plates and keeping the upper and lower sides of the outer slide frame moving synchronously. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention; Figure 2 This is a schematic diagram of the overall side view structure of the present invention; Figure 3 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 4 For the present invention Figure 3 A magnified structural diagram at point A; Figure 5 For the present invention Figure 3 A magnified structural diagram at point B; Figure 6 For the present invention Figure 3 A magnified structural diagram at point C; Figure 7 For the present invention Figure 3 A magnified structural diagram at point D; Figure 8 This is a schematic diagram of the internal cross-sectional structure of the hydraulic cylinder of the present invention; Figure 9 This is a schematic diagram of the external structure of the rotating drum of the present invention; Figure 10 This is a schematic diagram of the through-hole structure when the rotating cylinder of the present invention is unfolded in plane; Figure 11 This is a schematic diagram of the external structure of the watertight plate of the present invention.

[0027] In the diagram: 1. Water container; 2. Watertight plate; 3. Outlet pipe; 4. Inlet pipe; 5. First partition plate; 6. Connector; 7. Top rod; 8. Outer sliding frame; 81. Sealing ring; 9. Slide plate; 10. Push plate; 11. Oil cylinder; 111. Piston; 112. Inner rod; 12. Laser cutting head; 13. Distribution chamber; 14. Extension rod; 15. Telescopic rod; 16. Inclination sensor; 17. Frosted glass; 18. Second partition plate; 19. Water chamber; 20. Motor; 21. Pump oil pipe; 22. Inlet oil pipe; 23. Rotary drum; 231. Through hole; 232. Central plate; 24. Window glass; 25. Support base; In this invention, x represents the horizontal direction, with the arrow pointing to the right; y represents the forward / backward direction, with the arrow pointing forward; and z represents the vertical direction, with the arrow pointing upward. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1, please refer to Figures 1-5 , Figure 8 and Figure 11 The present invention provides a technical solution: The positioning fixture for laser cutting of lens glass includes a water container 1 and a laser cutting head 12. An outer sliding frame 8 is slidably connected to the inner side of the water container 1, and a sealing ring 81 is fixedly connected to the outer side of the outer sliding frame 8. The sealing ring 81 is slidably connected to the water container 1 and achieves a seal. A window glass 24 is installed on the inner side of the outer sliding frame 8. A water chamber 19 is located between the water container 1, the outer sliding frame 8 and the window glass 24. A support base 25 is fixedly connected to the inner side of the water container 1. A first partition plate 5 is fixedly connected to the inner side of the water container 1. A second partition plate 18 is fixedly connected to the side of the window glass 24 facing the inner side of the water container 1. Frosted glass 17 can be placed between the first partition plate 5 and the second partition plate 18 and at the top of the support base 25. When the outer sliding frame 8 moves inward to the water container 1, the first partition plate 5 and the second partition plate 18 clamp the frosted glass 17. At this time, the water depth on both sides of the frosted glass 17 is the thickness of the first partition plate 5 and the second partition plate 18, thereby achieving precise control of the water depth on the surface of the frosted glass 17. The laser cutting head 12 cuts on one side of the window glass 24 using a laser. The function of the window glass 24 is to allow the passage of a 1064 nm wavelength laser and to enclose the water. The laser cutting head uses a picosecond laser, a continuous laser, or a combination of both as a light source.

[0030] A force sensor can be installed on the first partition plate 5 to detect the clamping force of the frosted glass 1 and prevent the frosted glass 1 from breaking due to excessive pressure. Gaskets can be provided at the top pressing ends of the first partition plate 5 and the second partition plate 18; This invention not only fills the surface of frosted glass with a fixed thickness of water to reduce the diffuse reflection and refraction of the laser, but also keeps the free liquid surface in the water chamber 19 away from the cutting surface of the frosted glass 17, that is, completely immerses the frosted glass 17 in water, thereby keeping it away from the free liquid surface during the cutting process and avoiding the water ripples generated by the free liquid surface from affecting the laser cutting of the frosted glass 17.

[0031] The water in water chamber 19 cannot be completely filled; it serves as a gas compensation function, as air bubbles may be generated during laser cutting. To ensure the cutting effect of the laser, the present invention can accurately control the depth of the water on both sides of the frosted glass 17 to be cut. The method is as follows: the outer sliding frame 8 moves inward to the water container 1 so that the first partition plate 5 and the second partition plate 18 clamp the frosted glass 17. At this time, the water depth on both sides of the frosted glass 17 is the thickness of the first partition plate 5 and the second partition plate 18, thereby achieving precise control of the water depth on the surface of the frosted glass 17. In existing technologies, frosted glass 17 is often horizontally positioned for laser cutting. In this invention, the frosted glass 17 is placed vertically in a vertically positioned water container 1. This serves two purposes: first, to allow air bubbles generated in the water during laser operation to move upwards without obstruction under the influence of buoyancy, thus avoiding the presence of air bubbles affecting the laser welding process; and second, to ensure that even after the glass breaks during the cutting process, it still has bottom support, thus avoiding the problem of stress deformation caused by the glass sinking under gravity during horizontal cutting, which leads to discontinuous cut surfaces.

[0032] Specifically, the four corners of the water container 1 have rounded chamfers, which match the outer sliding frame 8 to increase the sealing performance.

[0033] The continuous arc chamfer can give the sealing ring 81 a continuous transition surface, avoiding sealing problems caused by uneven force at right angles; Specifically, the front end of the water container 1 is slidably connected to a watertight plate 2 with a handle. The watertight plate 2 and the water container 1 are disassembled and connected through a seal and friction. When the watertight plate 2 is pulled open, the frosted glass 17 can be placed on the support seat 25 between the first partition plate 5 and the second partition plate 18. The same operation method is used when taking it out.

[0034] In this invention, a pin-like mechanism can be provided between the watertight plate 2 and the front end of the water container 1 to effectively limit the watertight plate 2 and ensure that it is installed in place. Specifically, the front end of the water container 1 is fixedly connected to an inlet pipe 4 and an outlet pipe 3 with valves at the upper and lower positions, respectively. The inlet pipe 4 and the outlet pipe 3 are connected to the water chamber 19, and the flow and circulation of water in the water chamber 19 are realized through the inlet pipe 4 and the outlet pipe 3.

[0035] Specifically, a slide plate 9 is slidably connected to the inner sides of the top and bottom of the water container 1. A push plate 10 is fixedly connected to the left side of the top of the slide plate 9. At least two connectors 6 are fixedly connected to the right side of the top of the slide plate 9. A push rod 7 is fixedly connected to the left end of the connector 6. The push rod 7 is horizontally set and can move towards the inner side of the water container 1, thereby pushing the outer slide frame 8 towards the inner side of the water container 1 through the top contact.

[0036] Specifically, a hydraulic cylinder 11 is fixedly connected to the left end of the water container 1. The output end of the hydraulic cylinder 11 is fixedly connected to the push plate 10. The frosted glass 17 is clamped by the pushing action of the hydraulic cylinder 11. The hydraulic cylinder 11 includes an internally slidably connected piston 111 and an inner rod 112. The piston 111 and the inner rod 112 are fixedly connected. There is an oil chamber between the piston 111 and the inner side of the hydraulic cylinder 11. When the oil in the oil chamber increases, the inner rod 112 pushes the push plate 10.

[0037] Specifically, a distribution chamber 13 is fixedly connected to the middle of the left end of the water container 1. Pump oil pipes 21 are connected to the inner sides of both the upper and lower ends of the distribution chamber 13. The pump oil pipes 21 extend into the inner side of the oil chamber of the corresponding oil cylinder 11. An oil inlet pipe 22 is connected to the inner side of the distribution chamber 13.

[0038] Example 2 is a further improvement upon Example 1. Please refer to Example 1. Figures 1-11 An extension rod 14 is fixedly connected to the bottom end of the upper push plate 10 and the bottom end of the lower push plate 10. A telescopic rod 15 is rotatably connected between the two extension rods 14 via a hinge. The telescopic rod 15 plays the role of distance compensation when the angle changes. An inclination sensor 16 is fixedly connected to the surface of the telescopic rod 15. When the upper and lower push plates 10 move asynchronously, the telescopic rod 15 will tilt and be detected by the inclination sensor 16.

[0039] The extension rod 14 can enhance sensitivity. When the positions of the upper and lower push plates 10 are not synchronized, the longer the extension rod 14 is, the more the difference in horizontal position will be reflected in the angle deflection, and the more obvious the extension and retraction of the telescopic rod 15 will be, thus increasing the adjustment sensitivity.

[0040] Specifically, a motor 20 is fixedly connected to the left end of the distribution chamber 13. The output end of the motor 20 extends into the inner side of the distribution chamber 13 and is fixedly connected to a central disk 232. A rotating drum 23 is fixedly connected to the outer side of the central disk 232. The rotating drum 23 is rotatably connected to the inner side of the distribution chamber 13. Through holes 231 are provided on the upper and lower sides of the rotating drum 23. The through holes 231 are wedge-shaped. The through holes 231 on the upper and lower sides block one side of the input end of the upper and lower oil pump pipes 21 respectively. The through holes 231 on the upper and lower sides are symmetrically arranged. When the motor 20 rotates, the rotating drum 23 rotates synchronously. The overlapping area of ​​the through hole 231 on one side with the input end of the oil pump pipe 21 on the same side increases, and the overlapping area of ​​the through hole 231 on the other side with the input end of the oil pump pipe 21 on the same side decreases, thereby changing the thrust of the upper and lower push plates 10, so that the upper and lower sides of the outer sliding frame 8 keep moving synchronously.

[0041] Because the sealing ring 81 has a certain compressibility, and because the bottom sealing ring 81 needs to withstand greater water pressure, it may need to be made thicker and have greater friction. During the process of pushing the outer sliding frame 8, there is a possibility that the outer sliding frame 8 may tilt up and down. In order to avoid the outer sliding frame 8 tilting during the pushing process and affecting the laser cutting effect, the present invention can realize the adaptive adjustment of hydraulic pressure to ensure that the outer sliding frames 8 on both the upper and lower sides can be pushed synchronously. The oil inlet pipe 22 is connected to the output end of the external oil pump. When the oil pump is working, the oil enters the oil cylinder 11 through the distribution chamber 13, the through hole 231, and the pump oil pipe 21. The oil cylinder 11 pushes the push plate 10, and through the slide plate 9 and the connecting piece 6, the push rod 7 pushes the outer sliding frame 8, so that the outer sliding frame 8 clamps the frosted glass 17 that needs to be cut. During the clamping process, the angle of the rotating drum 23 is adjusted with reference to the tilt sensor 16 so that the upper and lower sides of the outer slide frame 8 move synchronously. For example, when the tilt sensor 16 tilts clockwise, the pushing speed on the upper surface is slower. At this time, the motor 20 rotates counterclockwise, the overlapping area of ​​the upper through hole 231 and the input end of the pump oil pipe 21 on the same side increases, and the overlapping area of ​​the lower through hole 231 and the input end of the pump oil pipe 21 on the same side decreases, thereby changing the pushing force of the upper and lower push plates 10 so that the upper and lower sides of the outer slide frame 8 move synchronously.

[0042] The present invention also discloses a positioning fixture for laser cutting of lens glass, the steps of which are: Step 1: Installation. Open the watertight plate 2, place the frosted glass 17 onto the support 25 between the first partition plate 5 and the second partition plate 18, and close the watertight plate 2 again. Step 2: Clamping. Connect the oil inlet pipe 22 to the output end of the external oil pump. When the oil pump is working, the oil cylinder 11 pushes the push plate 10, and through the slide plate 9 and the connecting piece 6, the push rod 7 pushes the outer slide frame 8, so that the outer slide frame 8 clamps the frosted glass 17 that needs to be cut. During the clamping process, refer to the tilt sensor 16 to adjust the angle of the rotating drum 23 so that the upper and lower sides of the outer slide frame 8 keep moving synchronously. Step 3: Fill with water. Connect the inlet pipe 4 to the external water supply pipe to fill the water chamber 19 with water. The water level should exceed that of the inlet pipe 4. Step 4: Water circulation. Connect the inlet pipe 4 to the input end of the external circulation pump and the outlet pipe 3 to the output end of the external circulation pump to achieve water circulation during the cutting process. Step 5: Cutting is achieved using the laser cutting head 12.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for laser cutting of lens glass, comprising a water container (1) and a laser cutting head (12), characterized in that: The inner side of the water container (1) is slidably connected to an outer sliding frame (8), and the outer side of the outer sliding frame (8) is fixedly connected to a sealing ring (81). The sealing ring (81) is slidably connected to the water container (1) and achieves sealing. A window glass (24) is installed on the inner side of the outer sliding frame (8). The water chamber (19) is located between the water container (1), the outer sliding frame (8) and the window glass (24). A support base (25) is fixedly connected to the inside of the water container (1), a first partition plate (5) is fixedly connected to the inside of the water container (1), a second partition plate (18) is fixedly connected to the side of the window glass (24) facing the inside of the water container (1), and frosted glass (17) can be placed between the first partition plate (5) and the second partition plate (18) and at the top of the support base (25). When the outer sliding frame (8) moves inward to the water container (1), the first partition plate (5) and the second partition plate (18) clamp the frosted glass (17). At this time, the water depth on both sides of the frosted glass (17) is the thickness of the first partition plate (5) and the second partition plate (18), thereby achieving precise control of the water depth on the surface of the frosted glass (17). The laser cutting head (12) cuts the window glass (24) on one side using a laser.

2. The positioning fixture for laser cutting of lens glass according to claim 1, characterized in that: The four corners of the water container (1) have rounded chamfers and match the outer sliding frame (8) to increase the sealing performance.

3. The positioning fixture for laser cutting of lens glass according to claim 1, characterized in that: The front end of the water container (1) is slidably connected to a watertight plate (2) with a handle. The watertight plate (2) and the water container (1) are disassembled and connected by a seal and friction. When the watertight plate (2) is pulled open, the frosted glass (17) can be placed on the support seat (25) between the first partition plate (5) and the second partition plate (18).

4. The positioning fixture for laser cutting of lens glass according to claim 1 or 3, characterized in that: The front end of the water container (1) is fixedly connected to the water inlet pipe (4) and the water outlet pipe (3) with valves. The water inlet pipe (4) and the water outlet pipe (3) are connected to the water chamber (19) and the water flow and circulation in the water chamber (19) are realized through the water inlet pipe (4) and the water outlet pipe (3).

5. The positioning fixture for laser cutting of lens glass according to claim 4, characterized in that: The top and bottom sides of the water container (1) are slidably connected to a slide plate (9). A push plate (10) is fixedly connected to the left side of the top of the slide plate (9). At least two connectors (6) are fixedly connected to the right side of the top of the slide plate (9). A top rod (7) is fixedly connected to the left end of the connector (6). The top rod (7) is horizontally set and can move towards the inside of the water container (1), thereby pushing the outer slide frame (8) towards the inside of the water container (1) through the top contact.

6. The positioning fixture for laser cutting of lens glass according to claim 5, characterized in that: A hydraulic cylinder (11) is fixedly connected to the left end of the water container (1). The output end of the hydraulic cylinder (11) is fixedly connected to the push plate (10). The frosted glass (17) is clamped by the pushing action of the hydraulic cylinder (11). The hydraulic cylinder (11) includes an internally sliding piston (111) and an inner rod (112). The piston (111) and the inner rod (112) are fixedly connected. The inner side of the piston (111) and the hydraulic cylinder (11) is an oil chamber. When the oil in the oil chamber increases, the inner rod (112) pushes the push plate (10).

7. The positioning fixture for laser cutting of lens glass according to claim 6, characterized in that: A distribution chamber (13) is fixedly connected to the middle of the left end of the water container (1). The inner sides of the upper and lower ends of the distribution chamber (13) are connected to the oil pump pipe (21). The oil pump pipe (21) extends into the inner side of the oil chamber of the corresponding oil cylinder (11). The inner side of the distribution chamber (13) is connected to the oil inlet pipe (22).

8. The positioning fixture for laser cutting of lens glass according to claim 7, characterized in that: An extension rod (14) is fixedly connected to the bottom end of the upper push plate (10) and the bottom end of the lower push plate (10). A telescopic rod (15) is rotatably connected between the two extension rods (14) via a hinge. An inclination sensor (16) is fixedly connected to the surface of the telescopic rod (15). When the upper and lower push plates (10) move asynchronously, the telescopic rod (15) will tilt and be detected by the inclination sensor (16).

9. The positioning fixture for laser cutting of lens glass according to claim 8, characterized in that: A motor (20) is fixedly connected to the left end of the distribution chamber (13). The output end of the motor (20) extends into the inner side of the distribution chamber (13) and is fixedly connected to a central disk (232). A rotating drum (23) is fixedly connected to the outer side of the central disk (232). The rotating drum (23) is rotatably connected to the inner side of the distribution chamber (13). Through holes (231) are provided on the upper and lower sides of the rotating drum (23). The through holes (231) are wedge-shaped. The through holes (231) on the upper and lower sides respectively block the flow of water. On one side of the input end of the upper and lower oil pump pipes (21), the through holes (231) on the upper and lower sides are symmetrically arranged. When the motor (20) rotates, the drum (23) rotates synchronously. The overlapping area of ​​the through hole (231) on one side with the input end of the oil pump pipe (21) on the same side increases, while the overlapping area of ​​the through hole (231) on the other side with the input end of the oil pump pipe (21) on the same side decreases, thereby changing the thrust of the upper and lower push plates (10) and making the upper and lower sides of the outer slide frame (8) move synchronously.

10. A positioning fixture for laser cutting of lens glass, comprising the positioning fixture for laser cutting of lens glass as described in claim 9, characterized in that, The steps are as follows: Step 1: Installation. Open the watertight plate (2), place the frosted glass (17) onto the support base (25) between the first partition plate (5) and the second partition plate (18), and close the watertight plate (2) again. Step 2: Clamping. Connect the oil inlet pipe (22) to the output end of the external oil pump. When the oil pump is working, the oil cylinder (11) pushes the push plate (10), and through the slide plate (9) and the connector (6), the push rod (7) pushes the outer slide frame (8), so that the outer slide frame (8) clamps the frosted glass (17) to be cut. During the clamping process, refer to the tilt sensor (16) to adjust the angle of the rotating drum (23) so that the upper and lower sides of the outer slide frame (8) keep moving synchronously. Step 3: Water injection. Connect the inlet pipe (4) to the external water supply pipe to inject water into the water chamber (19). The water injection height exceeds that of the inlet pipe (4). Step 4: Water circulation. Connect the inlet pipe (4) to the input end of the external circulation pump and the outlet pipe (3) to the output end of the external circulation pump to realize the circulation of water during the cutting process. Step 5: Cutting is achieved using the laser cutting head (12).

Images