Device for laser cutting in pipe

Abstract

The utility model discloses a device for laser cutting in a pipe, which comprises a protective lens component, the protective lens component comprises a reflector mounting groove, a copper reflector is clamped on the inner side of the reflector mounting groove, a threaded hole is arranged on the side surface of the protective lens component, and the copper reflector is clamped in the threaded hole. The side surface of the protection lens assembly is fixedly connected with a protection cover, the side surface of the protection cover is fixedly connected with a fixing screw, one end of the protection lens assembly is fixedly connected with a collimation assembly, the collimation assembly comprises a centering mechanism, and the upper surface of the centering mechanism is fixedly connected with an adjusting jackscrew. According to the device, laser optical fiber horizontal incidence can be achieved through the whole device, the copper reflecting mirror with the very small size is adopted at the tail end, the compact size can meet the requirement for cutting the inner wall of a pipe, in addition, the tail end is designed to be flat and better attached to the surface of a plate, and the distance between the nozzle and the plate during laser cutting can be close to 1 mm.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cutting, in particular to a device for laser cutting inside a tube. Background Art

[0002] Laser cutting of tubes has many advantages, such as narrow incision width, small heat-affected zone, fast cutting speed, good flexibility, smooth incision and no tool wear. With the emergence and development of CNC laser tube cutting machines, the development of various processing technologies for free-form surfaces and curves in space can better show its unique side. With the wide application, the demand for cutting from the inner wall of the tube is increasing, and it is very necessary to design a laser head that can cut inside the tube.

[0003] Existing laser cutting of pipes is limited by space constraints for laser cutting of large diameter pipes, and laser vertical cutting cannot be achieved at present. For example, a Chinese patent discloses a "laser cutting device for pipe fittings", and its application number is: "CN201920295003.0", which includes: a chuck for clamping one end of a flat pipe fitting, a flat rotating shaft supporting the chuck, a motor for driving the rotating shaft to rotate, a laser cutting head arranged directly above the pipe fitting, a first slide supporting the laser cutting machine, a flat first slide rail supporting the first slide, a flat exhaust pipe extending into the interior of the pipe fitting, and an exhaust device supporting the exhaust pipe. The device is limited by space constraints for laser cutting of large diameter pipes, and laser vertical cutting cannot be achieved at present, and its applicability is relatively limited. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a device for laser cutting inside a tube. The device is provided with a protective lens assembly so that the laser optical fiber of the entire device can be horizontally incident. A very small copper reflector is used at the end. The compact size can meet the requirements for cutting the inner wall of the tube. In addition, the end is designed to be flat and better fit to the surface of the plate, so that the distance between the nozzle and the plate during laser cutting can be close to 1 mm.

[0005] The utility model also provides a device for laser cutting in a pipe, comprising: a protective lens assembly, the protective lens assembly comprising: a reflector mounting groove, a copper reflector clamped on the inner side of the reflector mounting groove, a threaded hole provided on the side surface of the protective lens assembly, a protective cover fixedly connected to the side surface of the protective lens assembly, a fixing screw fixedly connected to the side surface of the protective cover, and the protective cover fixedly connected to the side surface of the protective lens assembly via the fixing screw; through the mutual cooperation between the above parts, the entire device can be horizontally incident with the laser optical fiber, and a very small copper reflector is used at the end, and the compact size can meet the requirements of inner wall cutting of the pipe.

[0006] One end of the protective lens assembly is fixedly connected to a collimator assembly, and the collimator assembly includes: a centering mechanism, an upper surface of which is fixedly connected to an adjusting screw, a side surface of which is fixedly connected to a collimator barrel, and a bottom end of which is fixedly connected to a cushion block. Through the mutual cooperation between the above parts, the divergent laser beam is changed into parallel light transmission.

[0007] According to the device for laser cutting in a tube described in the utility model, the side surface of the collimating assembly is fixedly connected with an optical fiber interface device, and the side surface of the optical fiber interface device is fixedly connected with a laser interface. The above parts cooperate with each other to facilitate connection.

[0008] According to the device for laser cutting in a tube described in the utility model, a mounting lock is fixedly connected to the side surface of the laser interface, and the laser interface is fixedly connected to the optical fiber interface device through the mounting lock. Through the mutual cooperation between the above parts, the laser optical fiber head can be fixed to the laser head through the mounting lock.

[0009] According to the device for laser cutting in a tube described in the utility model, the side surface of the optical fiber interface device is fixedly connected with a threaded interface, and the threaded interface is set as an external thread. The mutual cooperation between the above parts facilitates installation and disassembly.

[0010] According to the device for laser cutting in a tube described in the utility model, the side surface of the collimating assembly is fixedly connected with a focusing lens assembly, and the upper surface of the focusing lens assembly is fixedly connected with a cutting gas interface and an internal pressurized gas interface. Through the mutual cooperation between the above parts, the collimated laser beam is refocused into a beam with processing capability, the processing cutting gas interface is convenient for connecting the gas cutting tube, and the internal pressurized gas interface is convenient for connecting the pressurized gas pipe.

[0011] According to the device for laser cutting in a tube described in the utility model, the side surface of the focusing lens assembly is provided with a mounting hole, the side surface of the mounting hole is fixedly connected with a screw, and the collimating assembly is fixedly connected to the focusing lens assembly through the screw. The mutual cooperation between the above parts facilitates installation and use, and is convenient for disassembly.

[0012] According to the device for laser cutting in a tube described in the utility model, a pin is fixedly connected to the side surface of the focusing lens assembly, and the pin is fixedly connected to the collimating assembly. The above parts cooperate with each other to play a guiding role so that it will not deviate from the position during installation.

[0013] According to the device for laser cutting in a tube described in the utility model, the side surface of the protective lens assembly is fixedly connected to a reflector assembly, and the bottom end of the reflector assembly is fixedly connected to a nozzle. Through the mutual cooperation between the above parts, the laser transmission path can be changed so that the horizontal laser is vertically incident on the inner wall of the tube.

[0014] Beneficial Effects

[0015] Compared with the prior art, the utility model provides a protective lens assembly so that the entire device can be horizontally incident with the laser optical fiber. A very small copper reflector is used at the end. The compact size can meet the requirements for cutting the inner wall of the pipe. In addition, the end is designed to be flat, which is closer to the surface of the plate, and the distance between the nozzle and the plate during laser cutting can be close to 1mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 This is the overall structural diagram of the device for laser cutting inside a tube according to the utility model;

[0018] Figure 2 This is a structural diagram of the optical fiber interface device of the device for laser cutting in a tube according to the utility model;

[0019] Figure 3 This is a structural diagram of the collimation assembly of the device for laser cutting in a tube according to the utility model;

[0020] Figure 4 This is a structural diagram of a focusing lens assembly of a device for laser cutting in a tube according to the utility model;

[0021] Figure 5 This is a structural diagram of the protective lens assembly of the device for in-tube laser cutting of the utility model.

[0022] Legend:

[0023] 1. Fiber optic interface device; 2. Collimation assembly; 3. Focusing lens assembly; 4. Protective lens assembly; 5. Reflector assembly; 6. Nozzle; 7. Laser interface; 8. Mounting lock; 9. Threaded interface; 10. Centering mechanism; 11. Adjusting top screw; 12. Spacer; 13. Collimation lens barrel; 14. Cutting gas interface; 15. Internal pressurized gas interface; 16. Pin; 17. Mounting fixing hole; 18. Reflector mounting groove; 19. Threaded hole; 20. Copper reflector; 21. Protective cover; 22. Fixing screw. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0025] Reference Figure 1-5 The utility model embodiment is a device for laser cutting in a pipe, which includes: a protective lens assembly 4, a reflector assembly 5 is fixedly connected to the side surface of the protective lens assembly 4, a nozzle 6 is fixedly connected to the bottom end of the reflector assembly 5, and the laser transmission path can be changed to make the horizontal laser vertically incident on the inner wall of the pipe. The protective lens assembly 4 includes: a reflector mounting groove 18, a copper reflector 20 is clamped on the inner side of the reflector mounting groove 18, a threaded hole 19 is provided on the side surface of the protective lens assembly 4, a protective cover 21 is fixedly connected to the side surface of the protective lens assembly 4, and a fixing screw 22 is fixedly connected to the side surface of the protective cover 21. The protective cover 21 is fixedly connected to the side surface of the protective lens assembly 4 through the fixing screw 22, so that the entire device can be horizontally incident with the laser optical fiber, and a very small copper reflector 20 is used at the end, and the compact size can meet the requirements of cutting the inner wall of the pipe.

[0026] One end of the protective lens assembly 4 is fixedly connected to the collimating assembly 2, and the side surface of the collimating assembly 2 is fixedly connected to the focusing lens assembly 3, and the side surface of the focusing lens assembly 3 is fixedly connected to the pin 16, which is fixedly connected to the collimating assembly 2 and plays a guiding role so that it will not deviate from the position during installation. The side surface of the focusing lens assembly 3 is provided with a mounting fixing hole 17, and the side surface of the mounting fixing hole 17 is fixedly connected with a screw. The collimating assembly 2 is fixedly connected to the focusing lens assembly 3 by the screw, which is convenient for installation and use, and convenient for disassembly. The upper surface of the focusing lens assembly 3 is fixedly connected with a cutting gas interface 14 and an internal pressurized gas interface 15, which refocuses the collimated laser beam into a beam with processing capability. The processing and cutting gas interface 14 is convenient for connecting the gas cutting pipe, and the internal pressurized gas interface 15 is convenient for connecting the pressurized The side surface of the collimation component 2 is fixedly connected with the optical fiber interface device 1, and the side surface of the optical fiber interface device 1 is fixedly connected with the threaded interface 9, which is set as an external thread for easy installation and disassembly. The side surface of the optical fiber interface device 1 is fixedly connected with the laser interface 7 for easy connection. The side surface of the laser interface 7 is fixedly connected with the installation lock 8. The laser interface 7 is fixedly connected to the optical fiber interface device 1 through the installation lock 8. The laser optical fiber head can be fixed to the laser head through the installation lock 8. The collimation component 2 includes: a centering mechanism 10, and the upper surface of the centering mechanism 10 is fixedly connected with an adjusting top screw 11. The side surface of the centering mechanism 10 is fixedly connected with a collimation lens barrel 13, and the bottom end of the collimation lens barrel 13 is fixedly connected with a pad 12, so as to change the divergent laser beam into parallel light transmission.

[0027] Working principle: When using this device, first connect it to the fiber interface device 1 through the laser interface 7, and then fix the laser fiber head to the laser head through the installation lock 8. Secondly, the position of the collimating lens barrel 13 relative to the axis of the XY centering mechanism 10 can be changed through two adjusting screws 11 to change the divergent laser beam into parallel light transmission. Secondly, through the focusing lens assembly 3, the collimated laser beam is refocused into a beam with processing capability. The upper surface of the focusing lens assembly 3 is fixedly connected with a processing and cutting air interface 14 and an internal pressurized air interface 15. The processing and cutting air interface 14 is convenient for connecting the gas cutting pipe, and the internal pressurized air interface 15 is convenient for connecting the pressurized air pipe. Through the protective lens assembly 4, there is a protective lens The sheet can protect the optical elements above from dust pollution, and then by setting up a reflector assembly 5, which contains a copper reflector 20, the laser transmission path can be changed so that the horizontal laser is vertically incident on the inner wall of the tube. The copper reflector 20 is installed on the reflector assembly 5 by threading. The outer layer of the copper reflector 20 is installed with a protective cover 21 by fixing screws 22, which can protect the lens from dust pollution. Finally, the cutting airflow is gathered through the nozzle 6 to form a good cutting quality. The laser head extends horizontally into the tube without interference for laser processing. The compact size can meet the requirements of cutting the inner wall of the tube. In addition, the end is designed to be flat, which is closer to the surface of the plate, so that the distance between the nozzle 6 and the plate during laser cutting is close to 1mm.

[0028] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A device for laser cutting inside a tube, characterized in that: include: A protective lens assembly (4), the protective lens assembly (4) comprising: a reflector mounting groove (18), a copper reflector (20) being clamped inside the reflector mounting groove (18), a threaded hole (19) being provided on the side surface of the protective lens assembly (4), a protective cover (21) being fixedly connected to the side surface of the protective lens assembly (4), a fixing screw (22) being fixedly connected to the side surface of the protective cover (21), and the protective cover (21) being fixedly connected to the side surface of the protective lens assembly (4) via the fixing screw (22); One end of the protective lens assembly (4) is fixedly connected to a collimating assembly (2), and the collimating assembly (2) comprises: a centering mechanism (10), an upper surface of the centering mechanism (10) is fixedly connected to an adjusting top screw (11), a side surface of the centering mechanism (10) is fixedly connected to a collimating lens barrel (13), and a bottom end of the collimating lens barrel (13) is fixedly connected to a cushion block (12).

2. The device for laser cutting in a tube according to claim 1, characterized in that: The side surface of the collimating assembly (2) is fixedly connected to an optical fiber interface device (1), and the side surface of the optical fiber interface device (1) is fixedly connected to a laser interface (7).

3. The device for laser cutting in a tube according to claim 2, characterized in that: A mounting lock (8) is fixedly connected to the side surface of the laser interface (7), and the laser interface (7) is fixedly connected to the optical fiber interface device (1) via the mounting lock (8).

4. The device for laser cutting in a tube according to claim 2, characterized in that: A threaded interface (9) is fixedly connected to the side surface of the optical fiber interface device (1), and the threaded interface (9) is configured as an external thread.

5. The device for laser cutting in a tube according to claim 2, characterized in that: A focusing lens assembly (3) is fixedly connected to the side surface of the collimating assembly (2), and a cutting gas interface (14) and an internal pressurized gas interface (15) are fixedly connected to the upper surface of the focusing lens assembly (3).

6. The device for laser cutting in a tube according to claim 5, characterized in that: The side surface of the focusing lens assembly (3) is provided with a mounting and fixing hole (17), the side surface of the mounting and fixing hole (17) is fixedly connected with a screw, and the collimating assembly (2) is fixedly connected to the focusing lens assembly (3) via the screw.

7. The device for laser cutting in a tube according to claim 5, characterized in that: A pin (16) is fixedly connected to the side surface of the focusing lens assembly (3), and the pin (16) is fixedly connected to the collimating assembly (2).

8. The device for laser cutting in a tube according to claim 1, characterized in that: A reflector assembly (5) is fixedly connected to the side surface of the protective lens assembly (4), and a nozzle (6) is fixedly connected to the bottom end of the reflector assembly (5).

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