Novel water-jet guided laser processing time monitoring device

Abstract

The utility model relates to the technical field of laser cutting, in particular to a novel water-jet guided laser processing time monitoring device. Comprising a laser cutting mechanism, a to-be-machined workpiece and a workbench, the workbench is provided with an X-axis translation mechanism and a Y-axis translation mechanism, a cutting hole is formed in the surface of the workbench, the to-be-machined workpiece is placed on the workbench, and a water jet power detection mechanism is arranged below the workbench; according to the utility model, the processing time is indirectly judged by detecting the coupled output power after penetration, the water-light separation is realized according to the water jet power detection mechanism, and the processing time of the water-guided laser to the workpiece to be processed is determined according to the change of the measured laser power, so that the accuracy of measuring the processing time is greatly improved; the problem that the machining condition is difficult to judge by human vision is avoided, manpower is greatly saved, real-time judgment of the machining completion condition is facilitated, meanwhile, the judgment standard of the machining completion time is improved, and the machining efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting technology, specifically to a novel water-guided laser processing time monitoring device. Background Technology

[0002] Water-guided laser technology is an advanced technology that utilizes water as a light-conducting medium to transmit laser energy. Water, as a transmission medium, possesses high transparency, high heat capacity, and excellent cooling properties, effectively reducing thermal damage and scattering losses during laser transmission. This technology shows great application potential in research fields such as materials processing and environmental monitoring. However, to fully leverage the advantages of water-guided laser technology, the key lies in accurately measuring the processing time of the water-guided laser on materials, which is crucial for optimizing operating parameters and improving application results. Due to problems such as excessive water mist and excessively strong light during water-guided laser processing, it is impossible to visually measure the laser's processing time on the workpiece. Therefore, a novel water-guided laser processing time monitoring device and method are needed to accurately measure the processing time of the water-guided laser on materials. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a novel water-guided laser processing time monitoring device, which avoids the problem in existing technologies where the photodetector is greatly affected by complex environments and has low measurement accuracy, making it impossible to accurately determine the completion time of water-guided laser processing.

[0004] To achieve the above technical objectives, this utility model proposes the following technical solution: a novel water-guided laser processing time monitoring device, comprising a laser cutting mechanism, a workpiece to be processed, and a worktable. The worktable is equipped with an X-axis translation mechanism and a Y-axis translation mechanism. A cutting hole is opened on the surface of the worktable. The workpiece to be processed is placed on the worktable. A water jet power detection mechanism is set below the worktable. A control system is set on one side of the worktable. The detection target of the water jet power detection mechanism is to perform water-light separation of the coupled water jet emitted when penetrating and falling from the workpiece to be processed, and to detect the laser power after separation. The control system is used to receive the information monitored in real time by the water jet power detection mechanism, and to analyze, process, and feed back to the laser cutting mechanism, the X-axis translation mechanism, and the Y-axis translation mechanism.

[0005] Furthermore, the laser cutting mechanism includes a laser, an optical system, a reflector, and a coupling system. The laser is used to emit laser light, the optical system is used to focus the laser light emitted by the laser, the reflector is used to reflect the laser light focused by the optical system, and the coupling system is used to combine the focused laser light reflected by the reflector with the water flow to form a laser water jet, which is then emitted to the part of the workpiece to be processed.

[0006] Furthermore, the water jet power detection mechanism includes a housing and an integrating sphere located inside the housing. There is a gap between the housing and the integrating sphere. The top of the housing is provided with a first through hole corresponding to the cutting hole, and the bottom of the housing is provided with a second through hole at a position corresponding to the first through hole. The wall of the integrating sphere is provided with a light-entry window and a photosensitive element. The light-entry window is located below the first through hole, and the photosensitive element is connected to a computer.

[0007] Furthermore, the X-axis translation mechanism includes an X-axis slide rail and an X-axis cylinder, and the Y-axis translation mechanism includes a Y-axis slide rail and a Y-axis cylinder. The worktable is set on the Y-axis slide rail, and the Y-axis slide rail is slidably mounted on the X-axis slide rail. The X-axis cylinder drives the Y-axis slide rail and the worktable to extend and retract along the X-axis direction, and the Y-axis cylinder drives the worktable to extend and retract along the Y-axis direction.

[0008] Furthermore, the bottom of the workbench is provided with a support plate, on which a guide plate is slidably mounted, and a drive cylinder is provided on one side of the guide plate.

[0009] Furthermore, a collection box is provided on one side of the guide plate.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model indirectly judges the processing time by detecting the coupled output power after penetration, realizes water-light separation according to the water jet power detection mechanism, and determines the processing time of the workpiece to be processed by the water-guided laser based on the measured changes in laser power. This greatly improves the accuracy of measuring processing time, avoids the problem of difficulty in judging the processing status by human vision, greatly saves manpower, helps to judge the processing completion status in real time, improves the judgment standard for processing completion time, and improves processing efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the laser cutting mechanism structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the structure of the water jet power detection mechanism of this utility model;

[0013] Figure 3 This is a schematic diagram of the X-axis translation mechanism and the Y-axis translation mechanism of this utility model.

[0014] In the diagram, 1. Laser cutting mechanism; 11. Laser; 12. Optical system; 13. Reflector; 14. Coupling system; 2. Workpiece to be processed; 3. Worktable; 4. X-axis translation mechanism; 41. X-axis slide rail; 42. X-axis cylinder; 5. Y-axis translation mechanism; 51. Y-axis slide rail; 52. Y-axis cylinder; 6. Cutting hole; 7. Water jet power detection mechanism; 71. Housing; 72. Integrating sphere; 73. First through hole; 74. Second through hole; 75. Light inlet window; 76. Photosensitive element; 77. Computer; 8. Control system; 9. Support plate; 10. Guide plate. Detailed Implementation

[0015] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0016] like Figure 1-3 As shown, this utility model provides a novel water-guided laser processing time monitoring device, including a laser cutting mechanism 1, a workpiece 2 to be processed, and a worktable 3. The laser cutting mechanism 1 includes a laser 11, an optical system 12, a reflector 13, and a coupling system 14. The laser 11 is used to emit laser light, the optical system 12 is used to focus the laser light emitted by the laser 11, the reflector 13 is used to reflect the laser light focused by the optical system 12, and the coupling system 14 is used to combine the focused laser light reflected by the reflector with water flow to form a laser-water jet, which is then emitted to the processing area of ​​the workpiece 2. The laser 11 is connected to the optical system 12, the optical system is connected to the reflector 13, and the reflector 13 is connected to the coupling system 14. The laser-water jet nozzle of the coupling system 14 is directly facing the workpiece 2 to be processed. The worktable 3 is equipped with an X-axis translation mechanism 4 and a Y-axis translation mechanism 5. A cutting hole 6 is opened on the surface of the worktable 3, and the workpiece 2 to be processed is placed on it. On the workbench 3, a water jet power detection mechanism 7 is installed below the workbench 3, and a control system 8 is installed on one side of the workbench 3. The detection target of the water jet power detection mechanism 7 is to perform water-light separation of the coupled water jet emitted when penetrating and falling into the workpiece 2 to be processed, and to detect the laser power after separation. The laser power measured after separation is used by the control system 8 to receive the information monitored in real time by the water jet power detection mechanism 7, and to analyze, process and feed it back to the laser cutting mechanism 1, the X-axis translation mechanism 4 and the Y-axis translation mechanism 5. In this embodiment, the control system 8 is a PLC controller, which is existing technology and will not be described in detail here. The control system 8 controls the laser 11, the optical system 12 and the coupling system 14 in real time according to the signal analysis and processing results, thereby adjusting the height, speed, power and other parameters of the laser water jet irradiating the processing part of the workpiece 2 to be processed, thereby realizing closed-loop monitoring and processing of the laser water jet.

[0017] like Figure 1 and Figure 2As shown, this invention measures the processing time of a water-guided laser on a material indirectly by detecting the coupled output power after penetration. The coupled output power of the water-guided laser refers to the actual laser power transmitted to the target position through the water-guided medium. However, existing methods for testing coupled output power mainly rely on photodetectors or thermoelectric detectors. Due to the presence of water, the measurement environment is complex and easily affected by temperature, water flow speed, etc., making it difficult to meet the requirements of high-precision applications in terms of measurement accuracy and sensitivity. Therefore, in this embodiment, the coupled water jet is separated by a water jet power detection mechanism 7, and the separated laser power is detected. When the laser does not penetrate the workpiece 2, the measured laser power is 0. When the laser penetrates the workpiece 2, the measured laser power is greater than 0. During the processing, when the workpiece 2 is not continuously penetrated, the measured laser power shows a trend of increasing, decreasing, and then increasing again until the measured laser power remains greater than 0, indicating that the workpiece 2 has been cut. The time difference between the first time the laser power value is greater than 0 and the time from when the laser power value remains greater than 0 is the processing time of the water-guided laser on the material.

[0018] The water jet power detection mechanism 7 includes a housing 71 and an integrating sphere 72 located inside the housing 71. There is a gap between the housing 71 and the integrating sphere 72. The top of the housing 71 is provided with a first through hole 73 corresponding to the cutting hole 6, and the bottom of the housing 71 is provided with a second through hole 74 at a position corresponding to the first through hole 73. The wall of the integrating sphere 72 is provided with a light-entry window 75 and a photosensitive element 76. The light-entry window 75 is located below the first through hole 73. The photosensitive element 76 is connected to a computer 77. The computer 77 is existing technology and has basic functions such as data storage, processing and analysis, as well as communication and networking.

[0019] like Figure 2 As shown, the coupled water jet penetrates the workpiece 2 and enters the housing 71. The coupled water jet falls onto the light-entry window 75, then falls off the light-entry window 75 and flows out of the housing 71 through the second through hole 74 after passing through the gap between the housing 71 and the integrating sphere 73. The laser enters the integrating sphere 72 through the light-entry window 75 on the sphere wall. After reflection inside the integrating sphere 72, it forms uniform illumination. The photosensitive element 76 set on the sphere wall of the integrating sphere 72 converts the received light signal into an electrical signal and transmits it to the computer 77. The electrical signal is used to detect the coupled output power and record the time of reception. This embodiment can achieve water-light separation and avoid water affecting the detection accuracy.

[0020] The X-axis translation mechanism 4 includes an X-axis slide rail 41 and an X-axis cylinder 42, and the Y-axis translation mechanism 5 includes a Y-axis slide rail 51 and a Y-axis cylinder 52. The worktable 3 is mounted on the Y-axis slide rail 51, and the Y-axis slide rail 51 is slidably mounted on the X-axis slide rail 41. The X-axis cylinder 42 drives the Y-axis slide rail 51 and the worktable 3 to extend and retract along the X-axis direction, and the Y-axis cylinder 52 drives the worktable 3 to extend and retract along the Y-axis direction.

[0021] like Figure 3 As shown, the X-axis slide rail 41 and X-axis cylinder 42 are used to move the worktable 3 on the X-axis, and the Y-axis slide rail 51 and Y-axis cylinder 52 are used to move the worktable 3 in the Y-axis direction, so that the control system 8 can control the movement of the worktable 3.

[0022] The bottom of the worktable 3 is provided with a support plate 9, and a guide plate 10 is slidably installed on the support plate 9. A driving cylinder is provided on one side of the guide plate 10, and a collection box is provided on one side of the guide plate 10. Since the initial position and the end position of the water-guided laser cutting are at the same point during cutting, the guide plate 10 can be located at the initial end of the cutting part of the workpiece 2 to be processed, away from the laser cutting head. During the cutting process, the driving cylinder drives the guide plate 10 to move towards the cutting waste. During the movement, the guide plate 10 does not obstruct the laser beam from entering the light window 75, making it easy for the waste to fall onto the guide plate 10.

[0023] like Figure 2 As shown, during the laser cutting process of the workpiece 2 to be processed by the laser cutting mechanism 1, the driving cylinder drives the guide plate 10 to move towards the cutting hole. This can be used to collect the cut waste and let it fall into the collection box along the guide plate 10. This can prevent the waste from falling into the first through hole 73 and affecting the light beam from entering the integrating sphere 72 through the light inlet window 75. After the cutting is completed, the driving cylinder can control the guide plate 10 to move away from the cutting hole to avoid the guide plate 10 obstructing the passage of the laser beam.

[0024] The process of using this novel water-guided laser processing time monitoring device includes the following steps:

[0025] Step 1: The laser beam emitted by the laser 11 passes through the optical system 12 to be shaped into parallel light. After passing through the reflector 13, the beam enters the coupling system 14, where the focusing lens focuses the beam into a non-diffraction beam with a smaller diameter than the nozzle of the coupling cavity, a longer collimation range, and a smaller central spot. Then, it undergoes total internal reflection propagation inside the water column.

[0026] Step 2: Then, the laser 11 is controlled by the control system 8 to make the coupling system 14 emit a thin laser water jet of known power. The laser water jet moves relative to the workpiece 2 to be processed and is processed at the same time.

[0027] Step 3: When part 2 of the workpiece to be processed is not penetrated, the laser power measured by the photosensitive element 76 is 0;

[0028] Step 4: When the workpiece 2 to be processed penetrates the part to be processed for the first time, the laser power value measured by the photosensitive element 76 is greater than 0. At this time, the computer 14 records a processing penetration time.

[0029] Step 5: When the workpiece 2 to be processed is not continuously penetrated, the optical power value measured by the photosensitive element 76 shows a trend of increasing to decreasing to increasing;

[0030] Step 6: When the workpiece to be processed falls, the light power value measured by the photosensitive element 76 remains greater than 0. At this time, the computer 14 records a falling time, and the workpiece to be processed 2 is processed.

[0031] Step 7: Steps 3 to 6 constitute one processing cycle. After recording the penetration time and drop time, the system automatically proceeds to the next processing cycle. The worktable 6 is moved via the control system 8, and the position of the workpiece 2 to be processed is adjusted according to the preset processing interval to perform the next processing cycle. The computer 14 retains the previously recorded processing time, then resets it and records the next processing time.

[0032] Step 8: If a process fails to penetrate or is knocked out during a certain processing, the control system 8 will pause the current processing according to the preset maximum processing time and automatically proceed to the next processing (that is, when the preset maximum processing time is reached, the system will automatically start the next processing regardless of whether the current processing penetrates or is knocked out).

[0033] Step 9: After all workpieces 2 have been processed, the processing time data can be exported from computer 14, including the penetration time, drop time, and processing times that did not penetrate or drop.

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A novel water-guided laser processing time monitoring device, characterized in that: The system includes a laser cutting mechanism (1), a workpiece to be processed (2), and a worktable (3). The worktable (3) is equipped with an X-axis translation mechanism (4) and a Y-axis translation mechanism (5). A cutting hole (6) is provided on the surface of the worktable (3). The workpiece to be processed (2) is placed on the worktable (3). A water jet power detection mechanism (7) is provided below the worktable (3). A control system (8) is provided on one side of the worktable (3). The detection target of the water jet power detection mechanism (7) is to perform water-light separation of the coupled water jet emitted when the workpiece (2) is penetrated and when it falls, and to detect the laser power after separation. The control system (8) is used to receive the information monitored in real time by the water jet power detection mechanism (7), and to analyze, process and feed it back to the laser cutting mechanism (1), the X-axis translation mechanism (4), and the Y-axis translation mechanism (5).

2. The novel water-guided laser processing time monitoring device according to claim 1, characterized in that: The laser cutting mechanism (1) includes a laser (11), an optical system (12), a reflector (13), and a coupling system (14). The laser (11) is used to emit laser light, the optical system (12) is used to focus the laser light emitted by the laser (11), the reflector (13) is used to reflect the laser light focused by the optical system (12), and the coupling system (14) is used to combine the focused laser light reflected by the lens with the water flow to form a laser water jet, which is then emitted to the part of the workpiece (2) to be processed.

3. The novel water-guided laser processing time monitoring device according to claim 2, characterized in that: The water jet power detection mechanism (7) includes a housing (71) and an integrating sphere (72) located inside the housing (71). There is a gap between the housing (71) and the integrating sphere (72). The top of the housing (71) is provided with a first through hole (73) corresponding to the cutting hole (6). The bottom of the housing (71) is provided with a second through hole (74) at the position corresponding to the first through hole (73). The wall of the integrating sphere (72) is provided with a light-entry window (75) and a photosensitive element (76). The light-entry window (75) is located below the first through hole (73). The photosensitive element (76) is connected to a computer (77).

4. The novel water-guided laser processing time monitoring device according to claim 3, characterized in that: The X-axis translation mechanism (4) includes an X-axis slide rail (41) and an X-axis cylinder (42), and the Y-axis translation mechanism (5) includes a Y-axis slide rail (51) and a Y-axis cylinder (52). The worktable (3) is set on the Y-axis slide rail (51), and the Y-axis slide rail (51) is slidably mounted on the X-axis slide rail (41). The X-axis cylinder (42) drives the Y-axis slide rail (51) and the worktable (3) to extend and retract along the X-axis direction, and the Y-axis cylinder (52) drives the worktable (3) to extend and retract along the Y-axis direction.

5. The novel water-guided laser processing time monitoring device according to claim 3, characterized in that: The bottom of the workbench (3) is provided with a support plate (9), and a guide plate (10) is slidably installed on the support plate (9). A drive cylinder is provided on one side of the guide plate (10).

6. The novel water-guided laser processing time monitoring device according to claim 5, characterized in that: A collection box is provided on one side of the guide plate (10).

Images