Water spraying cooling mechanism and laser drilling device
By placing the water tank below the workpiece bearing platform in the water spray cooling mechanism and using a driver to drive the water spray arm to rise and fall vertically, the problem of complex and unstable structure of existing water spray mechanisms is solved, achieving a highly stable and efficient water spray cooling effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANS LASER TECH IND GRP CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-06-23
AI Technical Summary
Existing water spraying mechanisms are complex and unstable when drilling holes in ultra-thin glass, resulting in high processing instability.
A water spray cooling mechanism was designed, in which a water tank is set below the workpiece support platform, and the water spray component is vertically raised and lowered by a driver. After the water spray arm is lowered to the lowest position, it is aligned with the side opening. During processing, the water spray arm rises and comes close to the workpiece surface for cooling. The sprayed water flows directly back into the water tank to avoid overflow and pollution.
It achieves simple structure and high stability water spray cooling, significantly improving processing stability and efficiency, and avoiding water overflow and pollution.
Smart Images
Figure CN224390246U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of laser processing technology, and more specifically, relates to a water spray cooling mechanism and a laser drilling device. Background Technology
[0002] Water jet laser drilling technology has wide applications in aerospace, automotive manufacturing, and electronic communications. For example, it can be used to manufacture high-precision components such as aircraft engine nozzles, automotive engine blocks, and electronic product heat sinks.
[0003] When drilling holes in ultra-thin glass, water needs to be sprayed onto the processing area from the back of the product to cool it down. Existing water spraying mechanisms have complex structures and unstable performance. Utility Model Content
[0004] This application provides a water spray cooling mechanism with a simple structure and high stability.
[0005] The technical solution adopted in this application embodiment is: providing a water spray cooling mechanism, including:
[0006] A water tank is located below the workpiece carrying platform, which is horizontally movable and has a side opening; the top of the water tank has a recovery port, which is connected to the side opening.
[0007] A water spray assembly includes a water spray arm, a water spray column, and a driver. One end of the water spray arm is connected to the driver, and the other end extends horizontally to the recovery port and is located between the water tank and the workpiece carrying platform. The water spray column is located at the end of the water spray arm away from the driver and extends upward. The nozzle of the water spray column is arranged upward. The water spray arm has a water passage communicating with the water spray column. The driver is used to drive the water spray arm to descend to be opposite the opening, or to drive the water spray arm to rise to be close to the workpiece on the workpiece carrying platform.
[0008] Furthermore, it also includes a connection structure, one end of which is connected to the rack and the other end of which is connected to the driver.
[0009] Furthermore, the connection structure includes a vertical connector and a horizontal connector;
[0010] One end of the vertical connector is connected to the frame, and the other end extends downward;
[0011] One end of the horizontal connector is connected to the lower end of the vertical connector, and the other end extends horizontally toward the lateral opening. The driver is located on the horizontal connector.
[0012] Furthermore, the height of the horizontal connector on the vertical connector is adjustable.
[0013] Furthermore, the bottom of the water tank is also provided with a drain connector for connecting a drain pipe.
[0014] Furthermore, it also includes a water receiving box, which is located on the side of the workpiece bearing platform where the lateral opening is provided. One end of the water receiving box is connected to the water tank, and the other end extends to the end of the water spray arm away from the water spray column.
[0015] Furthermore, the actuator is a ball-guided cylinder.
[0016] Furthermore, after the driver drives the water spray arm to rise, the distance between the water spray nozzle and the workpiece is 5mm to 15mm.
[0017] Furthermore, after the driver drives the water spray arm to rise, the distance between the water spray nozzle and the workpiece is 10mm.
[0018] This application also provides a laser drilling device, including a workpiece carrying platform and a water spray cooling mechanism as described in any of the above claims, wherein the workpiece carrying platform is horizontally movable and has a lateral opening.
[0019] The beneficial effects of the water spray cooling mechanism provided in this application embodiment are as follows: In the water spray cooling mechanism of this application embodiment, the water tank is located below the workpiece bearing platform. The water spray arm of the water spray assembly is vertically raised and lowered by a driver. Initially, the water spray arm is lowered to its lowest position, with the water nozzle at the end of the water spray column facing upward and aligned with the side opening. During processing, the water spray column is inserted from the side opening and rises close to the workpiece surface (such as ultra-thin glass). The water spray column sprays cooling water onto the workpiece from the bottom surface upward, covering the laser processing area, quickly removing heat and reducing the risk of thermal deformation or cracking. The sprayed water flows directly back into the water tank below. After processing is completed, the water spray arm is lowered and reset, and the platform moves in the opposite direction to make the water spray column exit the side opening, completing the cycle. The water spray cooling mechanism of this application embodiment has a simple structure, using only a single-degree-of-freedom lifting and lowering drive for the water spray arm. The forced synchronization between the platform and the water tank ensures accurate positioning and water flow recovery, avoiding overflow pollution. It has high stability and significantly improves processing stability and efficiency. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 A three-dimensional structural diagram of the water spray assembly and connecting structure provided in the embodiments of this application;
[0022] Figure 2 A three-dimensional structural schematic diagram of the water spray cooling mechanism provided in the embodiments of this application;
[0023] Figure 3 A three-dimensional structural diagram of the water spray cooling mechanism inserted into the lateral opening of the workpiece bearing platform according to an embodiment of this application;
[0024] Figure 4 A cross-sectional view of the side opening of the water spray cooling mechanism inserted into the workpiece bearing platform, as provided in the embodiments of this application.
[0025] The following are the labeling elements in the figure:
[0026] 10. Water tank; 11. Recycling port; 12. Drain connector;
[0027] 20. Workpiece support platform; 21. Lateral opening; 22. Fixture; 23. Workpiece;
[0028] 30. Water spray assembly; 31. Water spray arm; 32. Water spray jet; 33. Driver;
[0029] 40. Connecting structure; 41. Vertical connector; 42. Horizontal connector;
[0030] 50. Water collection box. Detailed Implementation
[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0032] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0033] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0035] Please see Figure 1 The water spray cooling mechanism provided in the embodiments of this application will now be described. The water spray cooling mechanism provided in the embodiments of this application includes a water tank 10 and a water spray assembly 30.
[0036] Reference Figure 2 and Figure 3 The water tank 10 is located on the workpiece carrying platform 20 and below the workpiece 23 on the workpiece 23 platform. The workpiece carrying platform 20 is horizontally movable and has a side opening 21. The top of the water tank 10 has a recovery port 11, which is connected to the side opening 21.
[0037] Reference Figure 2 and Figure 3 The workpiece support platform 20 includes a movable platform capable of translation along the X and Y axes in a horizontal plane and a fixture 22 disposed on the movable platform. The fixture 22 is used to fix the workpiece 23 for processing. Specifically, the fixture 22 fixes the workpiece 23 (e.g., ultra-thin glass) onto the workpiece support platform 20 by vacuum adsorption. A water tank 10 is disposed on the workpiece support platform 20 and located below the workpiece 23 on the workpiece support platform 20, and can move horizontally synchronously with the workpiece support platform 20.
[0038] The workpiece carrying platform 20 is provided with a side opening 21, and the top of the water tank 10 is provided with a recovery port 11 that is directly connected to the side opening 21. When the water spraying assembly 30 is inserted into the side opening 21, the water sprayed by the water spraying assembly 30 can fall into the water tank 10 from the recovery port 11. Specifically, the side opening 21 is higher than the water tank 10. The side opening 21 of the workpiece carrying platform 20 can be designed as a rectangular or circular hole.
[0039] Reference Figure 1 and Figure 2The water spray assembly 30 includes a water spray arm 31, a water spray column 32, and a driver 33. One end of the water spray arm 31 is connected to the driver 33, and the other end extends horizontally to the recovery port and is located between the water tank and the workpiece carrying platform. The water spray column 32 is located at the end of the water spray arm 31 away from the driver 33 and extends upward. The nozzle of the water spray column 32 is set upward. The water spray arm 31 has a water passage communicating with the water spray column 32. The driver 33 is used to drive the water spray arm 31 to descend to be opposite the opening, or to drive the water spray arm 31 to rise to be close to the workpiece 23 on the workpiece carrying platform 20.
[0040] The water spray arm 31 can be made of lightweight aluminum alloy or stainless steel, with internal water channels. One end is connected to the driver 33 (such as a cylinder or electric actuator), and the other end extends horizontally to the side opening 21 of the platform. The driver 33 is controlled by a PLC to achieve vertical lifting. In the initial state, it lowers to the end of the water spray column 32 and aligns with the opening. During processing, it rises to bring the spray nozzle close to the surface of the workpiece 23 (such as ultra-thin glass). For example, the driver 33 can be a pneumatic slide with ball bearing guides, or a servo motor-driven lead screw to achieve a fine adjustment accuracy of ±0.1mm.
[0041] The water jet 32 is designed as an upward-extending straight pipe or elbow structure with the nozzle facing upwards. The end is equipped with a fan-shaped nozzle or atomizing nozzle to form a uniform water curtain covering the laser processing area. The internal water channels of the water jet arm 31 are connected to an external water source (such as the circulation system of a laser chiller), and a stable flow rate is provided by a high-pressure water pump. The distance between the water jet 32 and the surface of the workpiece 23 is typically controlled at 5-15mm to ensure rapid heat absorption and cooling while avoiding material deformation caused by water flow impact.
[0042] The working process of the water spray cooling mechanism provided in this embodiment is as follows: Initially, the water spray arm 31 descends to its lowest position, and the water spray column 32 aligns with the lateral opening 21 of the workpiece carrying platform. During processing, the workpiece 23 platform moves the workpiece 23, causing the water spray arm 31 and water spray column 32 to insert into the lateral opening 21, at which point the water spray column 32 is located below the workpiece 23. Then, the driver 33 synchronously drives the water spray arm 31 to rise, bringing the spray nozzle close to the surface of the workpiece 23. During processing, the laser cutting head cuts the workpiece from above, and high-pressure water is sprayed upward through the water spray column 32, forming a water curtain covering the laser's point of action, absorbing processing heat and rapidly cooling it. The workpiece carrying platform moves according to the cutting pattern (i.e., the laser cutting head can remain stationary while the workpiece moves). The sprayed water falls into the water tank 10 located below, preventing water from flowing outside the workpiece carrying platform 20 and causing a short circuit. After processing is completed, the water spray arm 31 descends to its reset position, and the platform moves in the opposite direction, causing the water spray column 32 to exit the opening, completing the cycle.
[0043] Reference Figure 1 and Figure 2 The water spray cooling mechanism provided in this application embodiment also includes a connecting structure 40, one end of which is connected to the frame and the other end is connected to the driver 33.
[0044] The two ends of the connection structure 40 are connected to the frame and the drive 33, respectively. The specific implementation method needs to be selected according to the principle and requirements of the mechanical connection. For example, if the drive 33 needs to be frequently adjusted in terms of installation angle or position, a hinged connection structure 40 can be used. The drive 33 is allowed to rotate or tilt within a certain range by engaging with the slide groove on the frame through a pin, and is fixed by a lock nut. If the drive 33 needs to withstand large vibration or impact loads, a bolt-flange connection structure 40 can be selected. Multiple threaded holes are pre-set in the frame and the base of the drive 33, and a rigid connection is achieved by high-strength bolts and anti-loosening washers to ensure long-term operational stability.
[0045] In addition, the connecting structure 40 may not be connected to the frame, but to a translation mechanism. The translation direction is along the length of the water spray arm. The water spray arm can be driven by the translation mechanism to insert into the side opening of the workpiece bearing platform to spray water to cool the bottom surface of the workpiece. After processing, the water spray arm can be pulled out from the side opening by the translation mechanism.
[0046] Reference Figure 1 and Figure 2 The connection structure 40 includes a vertical connector 41 and a horizontal connector 42; one end of the vertical connector 41 is connected to the frame, and the other end extends downward; one end of the horizontal connector 42 is connected to the lower end of the vertical connector 41, and the other end extends horizontally toward the lateral opening 21; the driver 33 is disposed on the horizontal connector 42.
[0047] The vertical connector 41 is typically made of aluminum alloy or carbon steel. One end is fixed to the frame by bolts or angle brackets, while the other end extends downward to form a vertical support. To enhance structural rigidity, the vertical connector 41 may be equipped with reinforcing ribs.
[0048] The horizontal connector 42 is connected to the lower end of the vertical connector 41 in the form of a support plate, and its end extends horizontally to the vicinity of the lateral opening 21 of the workpiece bearing platform 20. The driver 33 is installed at the end of the horizontal connector 42. The support plate is mostly made of thickened aluminum alloy or stainless steel, and may also be equipped with reinforcing ribs.
[0049] Reference Figure 1 and Figure 2The height of the horizontal connector 42 on the vertical connector 41 is adjustable. This height-adjustable design allows for flexible adjustment of the mounting position of the driver 33 to accommodate different workpiece thicknesses or processing requirements. This height adjustment function is typically achieved through either a bolted connection with a long hole or a slide rail-slider connection. For example, a strip-shaped or elliptical long hole can be provided at the lower end of the vertical connector 41, and the horizontal connector 42 is fixed to the vertical connector 41 by bolts passing through the long hole. When height adjustment is required, the bolts are loosened, the horizontal connector 42 is moved up and down along the long hole to the target position, and then re-locked. Height positioning can be quickly completed manually, and the structure is simple and reliable.
[0050] The practical application scenarios of this height adjustment function include: when the thickness of the workpiece 23 changes (such as processing a 5mm thin plate and a 20mm thick plate), the operator can adjust the height of the horizontal connector 42 to make the driver 33 drive the water spray arm 31 to rise and fall, so as to ensure that the distance between the water spray nozzle and the surface of the workpiece 23 is always maintained at the optimal cooling distance (such as 5-15mm).
[0051] Reference Figure 4 The bottom of the water tank 10 is also provided with a drain connector 12 for connecting a drain pipe. The drain connector 12 is usually located at the lowest point of the bottom of the water tank 10 or at a pre-set drain trough. The water in the water tank 10 is discharged in time through the drain pipe to prevent water from overflowing when the workpiece bearing platform 20 moves, which could cause a short circuit.
[0052] Reference Figure 2 and Figure 4 It also includes a water receiving box 50, which is located on the side of the workpiece bearing platform 20 where the lateral opening 21 is provided. One end of the water receiving box 50 is connected to the water tank 10, and the other end extends to the end of the water spray arm 31 away from the water spray column 32.
[0053] Reference Figure 2 The water receiving box 50 is a long, narrow trough that extends along one side of the workpiece bearing platform 20 toward the opening 21, with its overall length covering the horizontal movement range of the spray arm 31. The water receiving box 50 is typically made of corrosion-resistant stainless steel or engineering plastic.
[0054] The core function of the water collection box 50 is to collect and guide the cooling water dripping from the spray arm 31, preventing water droplets from directly contacting the workpiece 23 or the equipment surface. On the one hand, it can intercept water flowing down the outer wall of the spray arm 31, preventing it from contaminating the machined surface of the workpiece 23 or corroding the electronic components of the equipment; on the other hand, it reduces the accumulation of water stains on the ground, avoiding the risk of operators slipping.
[0055] Reference Figure 1 The driver 33 is a ball bearing guide cylinder to ensure that the water spray arm 31 does not tilt when it is raised or lowered.
[0056] In some embodiments, after the driver 33 drives the water spray arm 31 to rise, the distance between the water spray nozzle and the workpiece 23 is 5mm to 15mm, such as 8mm, 9mm, 10mm, 12mm, 14mm, etc.
[0057] Preferably, after the driver 33 drives the water spray arm 31 to rise, the distance between the water spray nozzle and the workpiece 23 is 10mm.
[0058] This application also provides a laser drilling device, including a workpiece carrying platform 20 and a water spray cooling mechanism as described in any of the above embodiments. The workpiece carrying platform 20 is horizontally movable and has a lateral opening 21.
[0059] The laser drilling device of this application includes the water spray cooling mechanism in any of the above embodiments, and therefore has the beneficial effects brought by the water spray cooling mechanism in any of the above embodiments, which will not be repeated here.
[0060] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A water jet cooling mechanism characterized by, include: A water tank is located below the workpiece carrying platform, which is horizontally movable and has a side opening; the top of the water tank has a recovery port, which is connected to the side opening. A water spray assembly includes a water spray arm, a water spray column, and a driver. One end of the water spray arm is connected to the driver, and the other end extends horizontally to the recovery port and is located between the water tank and the workpiece carrying platform. The water spray column is located at the end of the water spray arm away from the driver and extends upward. The nozzle of the water spray column is arranged upward. The water spray arm has a water passage communicating with the water spray column. The driver is used to drive the water spray arm to descend to be opposite the opening, or to drive the water spray arm to rise to be close to the workpiece on the workpiece carrying platform.
2. The water spray cooling mechanism according to claim 1, characterized by, It also includes a connection structure, one end of which is connected to the rack and the other end of which is connected to the driver.
3. The water spray cooling mechanism according to claim 2, characterized by, The connection structure includes vertical connectors and horizontal connectors; One end of the vertical connector is connected to the frame, and the other end extends downward; One end of the horizontal connector is connected to the lower end of the vertical connector, and the other end extends horizontally toward the lateral opening. The driver is located on the horizontal connector.
4. The water jet cooling mechanism according to claim 3, characterized in that The height of the horizontal connector on the vertical connector is adjustable.
5. The water spray cooling mechanism according to claim 1, characterized by, The bottom of the water tank is also provided with a drain connector for connecting a drain pipe.
6. The water spray cooling mechanism according to claim 1, characterized by It also includes a water receiving box, which is located on the side of the workpiece bearing platform where the lateral opening is located. One end of the water receiving box is connected to the water tank, and the other end extends to the end of the water spray arm away from the water spray column.
7. The water jet cooling mechanism of claim 1, wherein The actuator is a ball bearing guide cylinder.
8. The water spray cooling mechanism according to claim 1, characterized by After the driver drives the water spray arm to rise, the distance between the water spray nozzle and the workpiece is 5mm to 15mm.
9. The water jet cooling mechanism according to claim 8, wherein After the driver drives the water spray arm to rise, the distance between the water spray nozzle and the workpiece is 10mm.
10. A laser drilling apparatus, characterized by, It includes a workpiece carrying platform and a water spray cooling mechanism as described in any one of claims 1 to 9, wherein the workpiece carrying platform is horizontally movable and has a lateral opening.