Self-adaptive positioning device for ultraviolet laser

Abstract

The utility model relates to a self-adaptive positioning device for an ultraviolet laser, and relates to the field of lasers, and the self-adaptive positioning device comprises a rack, the bottom of the rack is fixedly connected with a working platform, the rack is slidably connected with a mounting seat, the mounting seat is fixedly connected with the ultraviolet laser, and the bottom of the ultraviolet laser is fixedly connected with an optical module. The optical module is erected above the working platform; the system also comprises a control panel, a driving module, an ultraviolet intensity sensor, a distance detection piece, a first single-chip microcomputer and a second single-chip microcomputer. The focal length of a laser beam can be automatically detected through an ultraviolet intensity sensor, a distance detection piece and a first single chip microcomputer; the height of the ultraviolet laser and the height of the optical module can be automatically adjusted through the distance detection piece, the first single-chip microcomputer and the second single-chip microcomputer according to the actually needed focal depth, the workpiece distance and the focal length value, and then the effect of automatically adjusting the focal depth is achieved. According to the invention, the convenience and accuracy of adjusting the focal depth of the ultraviolet laser beam of the ultraviolet laser cutting equipment by field operators can be effectively improved.

Description

Technical Field

[0001] The present application relates to the field of lasers, and in particular to an adaptive positioning device for ultraviolet lasers. Background Art

[0002] UV laser cutting machine is a laser emitted from a laser, which is focused into a high-power density UV laser beam through an optical path system. The laser beam irradiates the surface of the workpiece, which can make the surface of the workpiece coaxial with the high-pressure gas of the beam blow away the melted or vaporized material. As the relative position between the beam or the workpiece moves, the material eventually forms a slit, thereby achieving the purpose of cutting. Laser cutting uses an invisible beam to replace the traditional mechanical knife. It has the characteristics of high precision, fast cutting, not limited to cutting group restrictions, automatic typesetting to save materials, smooth incision, low processing cost, etc. It will gradually improve or replace traditional metal cutting process equipment.

[0003] In the prior art, common ultraviolet laser cutting equipment mainly includes a frame, on which a working platform, an ultraviolet laser, an optical module (composed of a beam expander, a galvanometer, a field lens, etc.), a computer, a CCD camera, etc. are arranged. The workpiece is placed on the working platform, the ultraviolet laser is adjustable and raised above the working platform, the optical module is fixed at the bottom of the laser, and the ultraviolet laser emits a light beam that passes through the beam expander, the galvanometer and the field lens to form an ultraviolet laser beam that is projected onto the surface of the workpiece.

[0004] Among them, the position of the focus formed by the ultraviolet laser beam emitted by the field mirror on the workpiece is closely related to the actual cutting effect. According to the focus position, the cutting process can be divided into three cutting methods: positive focus cutting, negative focus cutting and zero focus cutting. According to the required cutting effect, the operator needs to repeatedly debug the ultraviolet laser to adjust the focal depth of the ultraviolet laser beam. The debugging process needs to be assisted by steel or masking tape. The process of debugging the focal depth is complicated and the debugging accuracy is low, and there is room for improvement. Utility Model Content

[0005] In order to improve the convenience and accuracy of operators in adjusting the focal depth of ultraviolet laser cutting equipment, the present application provides an adaptive positioning device for ultraviolet lasers.

[0006] The present application provides an adaptive positioning device for ultraviolet lasers using the following technical solutions:

[0007] An adaptive positioning device for an ultraviolet laser comprises a frame, a working platform is fixedly connected to the bottom of the frame, a mounting seat is slidably connected to the frame, an ultraviolet laser is fixedly connected to the mounting seat, an optical module is fixedly connected to the bottom of the ultraviolet laser, and the optical module is mounted above the working platform; and:

[0008] A control panel, fixedly connected to the work platform, used for inputting a calibration start signal, an adjustment start signal, a processing start signal, and a depth of focus signal;

[0009] A driving module, fixed to the working platform, with a driving end fixedly connected to the mounting seat, for receiving the calibration start signal and driving the mounting seat to move toward a direction close to the working platform;

[0010] An ultraviolet intensity sensor, fixedly connected to the outer side wall of the optical module, and connected to the signal output terminal of the control panel, for receiving the calibration start signal, detecting the reflected ultraviolet intensity, and outputting an ultraviolet intensity signal;

[0011] A distance detection member, fixedly connected to the outer side wall of the optical module, and connected to the signal output terminal of the control panel, for receiving the calibration start signal, detecting the distance between the working platform and the bottom of the optical module, and outputting a first sensing distance signal, receiving the processing start signal, detecting the distance between the workpiece and the optical module, and outputting a second sensing distance signal;

[0012] A first single chip microcomputer, whose signal input end is signal-connected to the signal output end of the ultraviolet intensity sensor and the distance detection element, and is used to receive the ultraviolet intensity signal and the first sensing distance signal and output a focal length signal;

[0013] A second single-chip microcomputer, whose signal input end is signal-connected to the first single-chip microcomputer, the control panel and the signal output end of the distance detection element, and is used to receive the adjustment start signal, the focal depth signal, the second sensing distance signal and the focal length signal, calculate the driving distance and output a control signal;

[0014] The signal output terminal of the second single-chip microcomputer is connected to the driving module signal, and the driving module receives the control signal and slides a set distance in a direction close to or away from the working platform;

[0015] The signal input end of the ultraviolet laser is signal-connected to the signal output end of the control panel, and the ultraviolet laser receives the processing start signal and operates.

[0016] By adopting the above technical solution, before the actual processing, the operator inputs the calibration start signal through the control panel, and the driving module drives the mounting seat, the laser and the optical module to move toward or away from the working platform after receiving the calibration start signal. During the movement, the focus of the ultraviolet laser beam moves downward. When the focus of the ultraviolet laser beam and the table surface of the working platform are located in the same plane, the ultraviolet intensity value measured by the ultraviolet intensity sensor is the maximum. At this time, the distance between the bottom of the optical module and the working platform measured by the distance detection component is the focal length value; then, the operator places the workpiece sample to be processed on the working platform, and inputs the focal depth value and the adjustment start signal in sequence through the control panel. After receiving the adjustment start signal, the second single-chip microcomputer calculates the position deviation value of the mounting seat according to the second sensing distance, the focal length and the actual required focal depth value, and then outputs a control signal. After receiving the control signal, the driving module drives the mounting seat together with the laser and the optical module to move toward or away from the working platform to adjust the focus position of the ultraviolet laser beam; when the driving module stops driving, the operator can input the processing start signal through the control panel, and the ultraviolet laser runs after receiving the processing start signal to process the workpiece. Through the coordination and use of the control panel, the drive module, the ultraviolet intensity sensor, the distance detection element, the first single-chip microcomputer and the second single-chip microcomputer, the technical effect of automatically detecting the focal length of the laser beam and automatically adjusting the height of the mounting base, the ultraviolet laser and the optical module according to the actual required focal depth can be achieved. The operator can be exempted from repeated debugging and testing and can accurately adjust the focus position, effectively improving the convenience and accuracy of the operator in adjusting the ultraviolet laser cutting equipment.

[0017] Preferably, the driving module comprises a telescopic cylinder, a cylinder body of the telescopic cylinder is fixedly connected to the working platform, and a cylinder shaft of the telescopic cylinder is fixedly connected to the mounting seat.

[0018] By adopting the above technical solution, the telescopic cylinder extends or retracts the cylinder axis, which can drive the mounting seat, the ultraviolet laser and the optical module to move together in the direction close to or away from the working platform.

[0019] Preferably, a first mounting plate and a second mounting plate are fixedly connected to the frame, and the first mounting plate is mounted above the second mounting plate, and the mounting seat is embedded between the first mounting plate and the second mounting plate;

[0020] A guide rod is fixedly connected between the first mounting plate and the second mounting plate. The mounting seat comprises a connecting portion. A sliding hole matching the guide rod is formed through the connecting portion.

[0021] By adopting the above technical solution, the guide rod can limit the trajectory of the up and down sliding of the mounting seat, effectively improving the stability of the sliding movement of the mounting seat driven by the telescopic cylinder.

[0022] Preferably, a first spring and a second spring are coaxially sleeved on the guide rod, and two ends of the first spring are respectively fixedly connected to the first mounting plate and the top of the connecting part, and two ends of the second spring are respectively fixedly connected to the second mounting plate and the bottom of the connecting part.

[0023] By adopting the above technical solution, the first spring is respectively pressed between the connecting portion and the first mounting plate and the second mounting plate, which can further improve the stability of the up and down lifting and sliding of the mounting seat.

[0024] Preferably, the distance detection element includes an ultrasonic distance measuring sensor.

[0025] By adopting the above technical solution, the ultrasonic ranging sensor detects the surface of the workpiece or the work platform by emitting and receiving ultrasonic waves and calculating the distance, and can achieve the effect of distance measurement by ignoring factors such as the color, material, and transparency of the workpiece.

[0026] In summary, the present application provides an adaptive positioning device for ultraviolet lasers, which has at least one of the following beneficial technical effects:

[0027] 1. Through the coordination and use of the control panel, the telescopic cylinder, the ultraviolet intensity sensor, the ultrasonic distance sensor and the first single-chip computer, the technical effect of automatically detecting the focal length of the ultraviolet laser beam of the ultraviolet laser cutting equipment can be achieved;

[0028] 2. Through the coordination and use of the first single-chip microcomputer, the ultrasonic ranging sensor, the telescopic cylinder and the second single-chip microcomputer, the actual distance required to be adjusted can be automatically calculated according to the focal length value, the distance between the upper surface of the workpiece and the optical module, and the required focal depth. The telescopic cylinder can automatically drive the mounting base, the ultraviolet laser and the optical module to move to the set position, thereby achieving the technical effect of automatically adjusting the focal depth and improving the convenience and accuracy of the operator in adjusting the processing focal depth of the ultraviolet laser cutting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of an embodiment of the present application for illustrating the overall structure of a cutting device.

[0030] Figure 2 It is a schematic diagram of an embodiment of the present application for demonstrating the testing principle of the ultraviolet intensity sensor.

[0031] Figure 3 It is a schematic diagram of an embodiment of the present application for demonstrating the internal signal transmission of a cutting device.

[0032] Explanation of the reference numerals: 1. Frame; 11. Mounting seat; 111. Connecting portion; 112. Sliding hole; 12. Control panel; 13. First mounting plate; 14. Second mounting plate; 15. Guide rod; 16. First spring; 17. Second spring; 2. Working platform; 3. Ultraviolet laser; 4. Optical module; 5. Ultraviolet intensity sensor; 6. Telescopic cylinder; 7. Ultrasonic ranging sensor; 8. Workpiece. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-3 This application is described in further detail.

[0034] Example

[0035] The present application embodiment discloses an adaptive positioning device for ultraviolet laser. Figure 1 , Figure 2 as well as Figure 3 It mainly includes a frame 1, a working platform 2 is fixedly connected to the bottom of the frame 1, a mounting seat 11 is slidably connected to the frame 1, an ultraviolet laser 3 is fixedly connected to the mounting seat 11, an optical module 4 is fixedly connected to the bottom of the ultraviolet laser 3, and the optical module 4 is mounted above the working platform 2.

[0036] And: a control panel 12, fixedly connected to the work platform 2, used for inputting a calibration start signal, an adjustment start signal, a processing start signal, and a depth of focus signal; a driving module, fixedly connected to the work platform 2, a driving end of which is fixedly connected to the mounting seat 11, used for receiving a calibration start signal and driving the mounting seat 11 to move toward the direction close to the work platform 2; an ultraviolet intensity sensor 5, fixedly connected to the outer wall of the optical module 4, connected to the signal output end of the control panel 12, used for receiving a calibration start signal and detecting the reflected ultraviolet intensity, and outputting an ultraviolet intensity signal; a distance detection element, fixedly connected to the outer wall of the optical module 4, connected to the signal output end of the control panel 12, used for receiving a calibration start signal and detecting the reflected ultraviolet intensity, and outputting an ultraviolet intensity signal. Receive the calibration start signal and detect the distance between the working platform 2 and the bottom of the optical module 4 and output the first sensing distance signal, receive the processing start signal and detect the distance between the workpiece 8 and the optical module 4 and output the second sensing distance signal; the first single-chip microcomputer, the signal input end is connected to the ultraviolet intensity sensor 5 and the signal output end of the distance detection element, for receiving the ultraviolet intensity signal, the first sensing distance signal and outputting the focal length signal; the second single-chip microcomputer, the signal input end is connected to the first single-chip microcomputer, the control panel 12 and the signal output end of the distance detection element, for receiving the adjustment start signal, the depth of focus signal, the second sensing distance signal and the focal length signal, and calculating the driving distance and outputting the control signal.

[0037] The signal output terminal of the second single chip microcomputer is connected to the driving module signal, and the driving module receives the control signal and slides a set distance in the direction of approaching or moving away from the working platform 2. The signal input terminal of the ultraviolet laser 3 is connected to the signal output terminal of the control panel 12, and the ultraviolet laser 3 receives the processing start signal and runs.

[0038] Before actual processing, the operator inputs a calibration start signal through the control panel 12. After receiving the calibration start signal, the drive module drives the mounting seat 11, the laser and the optical module 4 to move toward or away from the working platform 2. During the movement, the focus of the ultraviolet laser beam moves downward. When the focus of the ultraviolet laser beam and the table surface of the working platform 2 are in the same plane, the ultraviolet intensity value measured by the ultraviolet intensity sensor 5 is the largest. At this time, the distance between the bottom of the optical module 4 and the working platform 2 measured by the distance detection component is the focal length value.

[0039] Subsequently, the operator places the sample of the workpiece 8 to be processed on the work platform 2, and inputs the focal depth value and the adjustment start signal in sequence through the control panel 12. After receiving the adjustment start signal, the second single-chip microcomputer calculates the position deviation value of the mounting seat 11 according to the second sensing distance, focal length and the actual required focal depth value, and then outputs a control signal. After receiving the control signal, the driving module drives the mounting seat 11 together with the laser and the optical module 4 to move toward or away from the work platform 2 to adjust the focal position of the ultraviolet laser beam.

[0040] When the driving module stops driving, the operator can input a processing start signal through the control panel 12, and the ultraviolet laser 3 runs after receiving the processing start signal, and can process the workpiece 8. Through the coordination and use of the control panel 12, the driving module, the ultraviolet intensity sensor 5, the distance detection element, the first single-chip microcomputer and the second single-chip microcomputer, the technical effect of automatically detecting the focal length of the laser beam and automatically adjusting the height of the mounting seat 11, the ultraviolet laser 3 and the optical module 4 according to the actual required focal depth can be achieved, which can avoid the operator from repeatedly debugging and testing and accurately adjust the focus position, effectively improving the convenience and accuracy of the operator in adjusting the ultraviolet laser cutting equipment.

[0041] In the embodiment of the present application, the driving module adopts a telescopic cylinder 6, the cylinder body of the telescopic cylinder 6 is fixedly connected to the working platform 2, and the cylinder shaft of the telescopic cylinder 6 is fixedly connected to the mounting seat 11. The telescopic cylinder 6 extends or retracts the cylinder shaft, which can drive the mounting seat 11, the ultraviolet laser 3 and the optical module 4 to move toward or away from the working platform 2.

[0042] In some other embodiments, the telescopic cylinder 6 can be replaced with a motor screw structure, a motor rack structure or a hydraulic cylinder according to actual needs, which is not limited here.

[0043] Reference Figure 1 The frame 1 is fixedly connected with a first mounting plate 13 and a second mounting plate 14, and the first mounting plate 13 is mounted above the second mounting plate 14, and the mounting seat 11 is embedded between the first mounting plate 13 and the second mounting plate 14; a guide rod 15 is fixedly connected between the first mounting plate 13 and the second mounting plate 14, and the mounting seat 11 includes a connecting portion 111, and a sliding hole 112 adapted to the guide rod 15 is opened through the connecting portion 111. The guide rod 15 can limit the trajectory of the mounting seat 11 sliding up and down, and effectively improve the stability of the sliding action of the mounting seat 11 driven by the telescopic cylinder 6.

[0044] Reference Figure 1 A first spring 16 and a second spring 17 are coaxially sleeved on the guide rod 15, and both ends of the first spring 16 are fixedly connected to the first mounting plate 13 and the top of the connecting portion 111, respectively, and both ends of the second spring 17 are fixedly connected to the second mounting plate 14 and the bottom of the connecting portion 111, respectively.

[0045] The first spring 16 is respectively pressed between the connecting portion 111 and the first mounting plate 13 and the second mounting plate 14 , which can further improve the stability of the mounting seat 11 in the up-and-down sliding.

[0046] In the embodiment of the present application, the distance detection element is an ultrasonic distance sensor 7. The ultrasonic distance sensor 7 detects the surface of the workpiece 8 or the surface of the work platform 2 by emitting and receiving ultrasonic waves and calculating the distance, and can achieve the effect of distance measurement by ignoring factors such as the color, material, and transparency of the workpiece 8.

[0047] The implementation principle of an adaptive positioning device for an ultraviolet laser in an embodiment of the present application is as follows: by matching and using the control panel 12, the telescopic cylinder 6, the ultraviolet intensity sensor 5, the ultrasonic ranging sensor 7 and the first single-chip microcomputer, the technical effect of automatically detecting the focal length of the ultraviolet laser beam of the ultraviolet laser cutting equipment can be achieved. By matching and using the first single-chip microcomputer, the ultrasonic ranging sensor 7, the telescopic cylinder 6 and the second single-chip microcomputer, the actual distance required to be adjusted can be automatically calculated based on the focal length value, the distance between the upper surface of the workpiece 8 and the optical module 4, and the required focal depth. The mounting seat 11, the ultraviolet laser 3 and the optical module 4 can be automatically driven by the telescopic cylinder 6 to move to the set position, thereby achieving the technical effect of automatically adjusting the focal depth, thereby improving the convenience and accuracy of the operator in adjusting the processing focal depth of the ultraviolet laser cutting equipment.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An adaptive positioning device for ultraviolet laser, characterized in that: The invention comprises a frame (1), the bottom of the frame (1) is fixedly connected to a working platform (2), the frame (1) is slidably connected to a mounting seat (11), an ultraviolet laser (3) is fixedly connected to the mounting seat (11), the bottom of the ultraviolet laser (3) is fixedly connected to an optical module (4), and the optical module (4) is mounted above the working platform (2); as well as: A control panel (12) is fixedly connected to the working platform (2) and is used to input a calibration start signal, an adjustment start signal, a processing start signal, and a depth of focus signal; A drive module, fixed to the working platform (2), with a drive end fixedly connected to the mounting seat (11), and used for receiving the calibration start signal and driving the mounting seat (11) to move in a direction close to the working platform (2); An ultraviolet intensity sensor (5) is fixedly connected to the outer side wall of the optical module (4), is signal-connected to the signal output end of the control panel (12), and is used to receive the calibration start signal, detect the intensity of reflected ultraviolet rays, and output an ultraviolet intensity signal; a distance detection component, fixedly connected to the outer side wall of the optical module (4), signal-connected to the signal output end of the control panel (12), used for receiving the calibration start signal and detecting the distance between the working platform (2) and the bottom of the optical module (4) and outputting a first sensing distance signal, receiving the processing start signal and detecting the distance between the workpiece (8) and the optical module (4) and outputting a second sensing distance signal; a first single chip computer, whose signal input end is signal-connected to the ultraviolet intensity sensor (5) and the signal output end of the distance detection element, and is used to receive the ultraviolet intensity signal and the first sensing distance signal and output a focal length signal; A second single-chip computer, whose signal input end is signal-connected to the first single-chip computer, the control panel (12) and the signal output end of the distance detection element, and is used to receive the adjustment start signal, the focal depth signal, the second sensing distance signal and the focal length signal, calculate the driving distance and output a control signal; The signal output end of the second single-chip microcomputer is connected to the driving module signal, and the driving module receives the control signal and slides a set distance in a direction close to or away from the working platform (2); The signal input end of the ultraviolet laser (3) is signal-connected to the signal output end of the control panel (12); the ultraviolet laser (3) receives the processing start signal and operates.

2. The adaptive positioning device for ultraviolet laser according to claim 1, characterized in that: The driving module comprises a telescopic cylinder (6), a cylinder body of the telescopic cylinder (6) being fixedly connected to the working platform (2), and a cylinder shaft of the telescopic cylinder (6) being fixedly connected to the mounting seat (11).

3. The adaptive positioning device for ultraviolet laser according to claim 2, characterized in that: A first mounting plate (13) and a second mounting plate (14) are fixedly connected to the frame (1), and the first mounting plate (13) is mounted above the second mounting plate (14), and the mounting seat (11) is embedded between the first mounting plate (13) and the second mounting plate (14); A guide rod (15) is fixedly connected between the first mounting plate (13) and the second mounting plate (14); the mounting seat (11) comprises a connecting portion (111); and a sliding hole (112) adapted to the guide rod (15) is formed through the connecting portion (111).

4. The adaptive positioning device for ultraviolet laser according to claim 3, characterized in that: A first spring (16) and a second spring (17) are coaxially sleeved on the guide rod (15); two ends of the first spring (16) are respectively fixedly connected to the first mounting plate (13) and the top of the connecting portion (111); and two ends of the second spring (17) are respectively fixedly connected to the second mounting plate (14) and the bottom of the connecting portion (111).

5. The adaptive positioning device for ultraviolet laser according to claim 1, characterized in that: The distance detection component comprises an ultrasonic distance measuring sensor (7).

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