Coupling head assembly and water guide laser cutting equipment

Abstract

The utility model provides a coupling head assembly and water-jet guided laser cutting equipment, and relates to the technical field of water-jet guided laser, the coupling head assembly is arranged at the laser emitting end of the water-jet guided laser cutting equipment, the coupling head assembly comprises a nozzle, a laser, a focusing lens cone and a lifting module; the laser is fixed at the upper part of the focusing lens cone; the nozzle is located at the focus position of the lower portion of the focusing lens barrel. Laser emitted by the laser is focused at the nozzle position after passing through the focusing lens barrel; a lifting part of the lifting module is rigidly connected with the focusing lens barrel; and the focusing lens barrel moves up and down under the action of the lifting part. According to the scheme, the focus lens barrel is driven to move through the lifting module arranged in the coupling head assembly, and the position of the focus lens barrel can be adjusted through the lifting module when the temperature rises, so that it is guaranteed that the focus of a laser beam is converged to the proper position of the nozzle, and the problem of focus position deviation caused by temperature rise of a coupling head is solved; and the probability that the nozzle is damaged by the laser beam is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water-guided laser, in particular to a coupling head assembly and a water-guided laser cutting device. Background Technique

[0002] The basic principle of a water-guided laser cutting device is a process of coupling a high-power pulsed laser beam into a water jet and then acting on the surface of a workpiece for processing. The laser beam is output in a fiber-coupled manner and is focused by a lens in the coupling head onto a nozzle placed on a flat water cavity base. The columnar water jet ejected from the nozzle guides the laser to act vertically on the surface of the workpiece. The water-guided laser cutting device can generate a slit parallel to the cross-section of the cut in the workpiece through the processing method of coupling laser and water jet, which not only ensures high-precision processing but also suppresses the high temperature in the processing area.

[0003] It can be seen that the coupling head of the water-guided laser cutting device has extremely high requirements for optical precision, and it is necessary to accurately adjust the lens to ensure that the focus of the laser beam converges at a suitable position of the nozzle. However, during actual use, the temperature of the coupling head will gradually increase during operation, resulting in the expansion of components, affecting the focus position of the laser beam, and easily causing damage to the nozzle by the laser beam. Summary of the Utility Model

[0004] In view of this, the purpose of the present utility model is to provide a coupling head assembly and a water-guided laser cutting device. The lifting module provided in the coupling head assembly drives the focusing lens barrel to move. When the temperature rises, the position of the focusing lens barrel can be adjusted by the lifting module, so as to ensure that the focus of the laser beam converges at a suitable position of the nozzle, solve the problem of the deviation of the focus position caused by the temperature rise of the coupling head, and reduce the probability of damage to the nozzle by the laser beam.

[0005] In a first aspect, an embodiment of the present utility model provides a coupling head assembly. The coupling head assembly is arranged at the laser emission end of the water-guided laser cutting device. The coupling head assembly includes: a nozzle, a laser, a focusing lens barrel, and a lifting module;

[0006] The laser is fixed on the upper part of the focusing lens barrel; the nozzle is located at the focal position of the lower part of the focusing lens barrel; the laser emitted by the laser is focused on the nozzle position after passing through the focusing lens barrel;

[0007] The lifting part of the lifting module is rigidly connected to the focusing lens barrel; the focusing lens barrel moves up and down under the action of the lifting part.

[0008] In an embodiment, a slider is arranged in the lifting module; the slider is rigidly connected to the focusing lens barrel; the slider slides in the lifting part.

[0009] In one embodiment, a cantilever is provided in the lifting module; one end of the cantilever is connected to the slider, and the other end of the cantilever is connected to the focusing lens barrel.

[0010] In one embodiment, an electric lifting component is provided in the lifting module; the movable end of the electric lifting component is connected to the slider.

[0011] In one embodiment, a first guide rail is provided in the lifting module; the first guide rail is vertically arranged in the movable area of the lifting part, and the lifting part is fixed on the first guide rail.

[0012] In one embodiment, a second guide rail is provided outside the focusing lens barrel; the second guide rail is arranged in the movable area of the focusing lens barrel, and the focusing lens barrel is fixed on the second guide rail.

[0013] In one embodiment, the coupling head assembly further includes: an aluminum shell; wherein, the nozzle, the laser, the focusing lens barrel and the lifting module are all arranged inside the aluminum shell.

[0014] In one embodiment, the coupling head assembly further includes: a temperature sensor; the signal transmission end of the temperature sensor is connected to the first signal transmission end of the lifting module; the lifting part in the lifting module controls the focusing lens barrel to move up and down based on the temperature signal collected by the temperature sensor.

[0015] In one embodiment, the coupling head assembly further includes: a focusing detector; the signal transmission end of the focusing detector is connected to the second signal transmission end of the lifting module; the lifting part in the lifting module controls the focusing lens barrel to move up and down based on the focusing signal collected by the focusing detector.

[0016] In a second aspect, an embodiment of the present invention provides a water-guided laser cutting device, which includes the coupling head assembly mentioned in the first aspect, wherein the coupling head assembly is arranged at the laser emission end of the water-guided laser cutting device.

[0017] An embodiment of the present invention provides a coupling head assembly and a water-guided laser cutting device. The coupling head assembly is arranged at the laser emission end of the water-guided laser cutting device. The coupling head assembly includes: a nozzle, a laser, a focusing lens barrel and a lifting module; the laser is fixed on the upper part of the focusing lens barrel; the nozzle is located at the focal position of the lower part of the focusing lens barrel; the laser emitted by the laser is focused on the nozzle position after passing through the focusing lens barrel; the lifting part of the lifting module is rigidly connected to the focusing lens barrel; the focusing lens barrel moves up and down under the action of the lifting part. This solution drives the focusing lens barrel to move through the lifting module provided in the coupling head assembly. When the temperature rises, the position of the focusing lens barrel can be adjusted by the lifting module, so as to ensure that the focus of the laser beam converges to the appropriate position of the nozzle, solve the problem of the deviation of the focus position caused by the temperature rise of the coupling head, and reduce the probability of the nozzle being damaged by the laser beam.

[0018] Other features and advantages of the present utility model will be described in the subsequent specification, and part of them will become obvious from the specification or be understood by implementing the present utility model. The objectives and other advantages of the present utility model are achieved and obtained by the structures specifically pointed out in the specification, claims and drawings.

[0019] In order to make the above-mentioned objectives, features and advantages of the present utility model more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, the detailed description is as follows. Description of the Drawings

[0020] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Structural schematic diagram of the first coupling head assembly provided by an embodiment of the present utility model;

[0022] Figure 2 Structural schematic diagram of the second coupling head assembly provided by an embodiment of the present utility model;

[0023] Figure 3 Structural schematic diagram of the third coupling head assembly provided by an embodiment of the present utility model.

[0024] Icon:

[0025] 10 - Nozzle; 20 - Laser; 30 - Focusing lens barrel; 40 - Lifting module; 50 - Aluminum housing; 60 - Temperature sensor; 70 - Focus detector;

[0026] 41 - Slide block; 42 - Cantilever; 43 - Electric lifting component; 44 - First guide rail; 45 - Second guide rail. Detailed Embodiments

[0027] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions of the present utility model in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0028] The basic principle of the water-guided laser cutting equipment is a process of coupling a high-power pulsed laser beam into a water jet and then acting on the surface of the workpiece for processing. The laser beam is output in a fiber-coupled manner and is focused onto a nozzle placed on a flat water cavity base through a lens in the coupling head. The columnar water jet ejected from the nozzle guides the laser to act vertically on the surface of the workpiece. Through the processing method of coupling the laser with the water jet, the water-guided laser cutting equipment can generate a slit parallel to the cross-section of the cut in the workpiece, which not only ensures high-precision processing but also suppresses the high temperature in the processing area.

[0029] It can be seen that the coupling head of the water-guided laser cutting equipment has extremely high requirements for optical accuracy, and the lens needs to be accurately adjusted to ensure that the focus of the laser beam converges to the appropriate position of the nozzle. However, during actual use, the temperature of the coupling head gradually rises during operation, resulting in the expansion of components and affecting the focus position of the laser beam, which is likely to cause damage to the nozzle by the laser beam. Based on this, the embodiment of the present utility model provides a coupling head assembly and a water-guided laser cutting equipment. The lifting module provided in the coupling head assembly drives the focusing lens barrel to move. When the temperature rises, the position of the focusing lens barrel can be adjusted by the lifting module, so as to ensure that the focus of the laser beam converges to the appropriate position of the nozzle, solve the problem of the deviation of the focus position caused by the temperature rise of the coupling head, and reduce the probability of the nozzle being damaged by the laser beam.

[0030] To facilitate the understanding of this embodiment, first, a detailed introduction is made to the first coupling head assembly disclosed in the embodiment of the present utility model. This coupling head assembly is arranged at the laser emission end of the water-guided laser cutting equipment, specifically as Figure 1 shown. This coupling head assembly includes: a nozzle 10, a laser 20, a focusing lens barrel 30, and a lifting module 40. The laser 20 is fixed on the upper part of the focusing lens barrel 30; the nozzle 10 is located at the focal position of the lower part of the focusing lens barrel 30; the laser emitted by the laser 20 is focused on the nozzle position of the nozzle 10 after passing through the focusing lens barrel 30. The lifting part of the lifting module 40 is rigidly connected to the focusing lens barrel 30; the focusing lens barrel 30 moves up and down under the action of the lifting part.

[0031] Specifically, the nozzle 10, the laser 20, the focusing lens barrel 30, and the lifting module 40 are all part of the coupling head assembly. The nozzle 10 is arranged at the focal position of the focusing lens barrel 30, and the columnar water jet ejected from the nozzle 10 finally acts on the surface of the workpiece. The focusing lens barrel 30 is arranged above the nozzle 10, and the laser 20 is arranged above the focusing lens barrel 30. The laser emitted from the laser 20 passes through the focusing of the focusing lens barrel 30 from top to bottom and is in the nozzle 10. It is worth mentioning the lifting module 40. The lifting module 40 is provided with a lifting part. The lifting part is rigidly connected to the focusing lens barrel 30 and can move in the vertical direction. Thus, under the action of the lifting part, the focusing lens barrel 30 can also move up and down. Therefore, when the temperature of the coupling head assembly rises and causes a deviation in the focal position, the position of the focusing lens barrel 30 can be adjusted to ensure that the laser beam emitted by the laser 20 converges to a suitable position of the nozzle 10, thereby reducing the probability of the nozzle 10 being damaged by the laser beam.

[0032] As Figure 2 shown in the structural schematic diagram of the second coupling head assembly, in one embodiment, the lifting module 40 is provided with a slider 41; the slider 41 is rigidly connected to the focusing lens barrel 30; the slider 41 slides in the lifting part. The slider 41 can slide up and down in the vertical direction in the lifting part and is rigidly connected to the focusing lens barrel 30, thereby realizing the precise adjustment of the position of the focusing lens barrel 30 by controlling the slider 41.

[0033] It can be seen that the rigid connection between the lifting module 40 and the focusing lens barrel 30 is particularly important. Therefore, in one embodiment, the lifting module 40 is provided with a cantilever 42; one end of the cantilever 42 is connected to the slider 41, and the other end of the cantilever 42 is connected to the focusing lens barrel 30. The cantilever 42 is essentially a rigid force arm, and its two ends are respectively fixed in the slider 41 and the focusing lens barrel 30, thereby ensuring the rigid connection between the slider 41 and the focusing lens barrel 30.

[0034] After ensuring the rigid connection between the slider 41 and the focusing lens barrel 30, how to precisely control the lifting of the slider 41 is also a crucial link for precisely controlling the position of the focusing lens barrel 30. In one embodiment, the lifting module 40 is provided with an electric lifting component 43; the movable end of the electric lifting component 43 is connected to the slider 41. The movable end of the electric lifting component 43 can drive the slider 41 to move, thereby precisely adjusting the position of the focusing lens barrel 30 so that the laser beam emitted by the laser 20 precisely converges to a suitable position of the nozzle 10.

[0035] In one embodiment, a first guide rail 44 is provided in the lifting module 40; the first guide rail 44 is vertically arranged within the movable area of the lifting part, and the lifting part is fixed on the first guide rail 44. For the slider 41, the first guide rail 44 is arranged within the movable area of the slider 41, and the slider 41 is fixed on the first guide rail 44, thereby realizing movement in the vertical direction and avoiding offset in the horizontal direction.

[0036] In one embodiment, a second guide rail 45 is provided outside the focusing lens barrel 30; the second guide rail 45 is arranged within the movable area of the focusing lens barrel 30, and the focusing lens barrel 30 is fixed on the second guide rail 45. For the focusing lens barrel 30, the second guide rail 45 is arranged within the movable area of the focusing lens barrel 30, and the focusing lens barrel 30 is fixed on the second guide rail, thereby realizing precise movement in the vertical direction and avoiding offset in the horizontal direction.

[0037] In an actual scenario, the focus of the laser beam needs to be adjusted to a position that is not easily damaged to the nozzle. After the water-guided laser cutting equipment is started, the temperature of the coupling head will rise, and parts such as the focusing lens barrel 30 will have an expansion phenomenon. Since the position of the focus of the laser beam is determined by the position of the focusing lens barrel 30, the expansion after the temperature rise will cause the focus position to move. At this time, the position of the focusing lens barrel 30 can be adjusted through the lifting module 40, and then the focus position can be moved, so that the focus position can adapt to the deviation caused by the temperature rise. Thereby reducing the damage probability of the nozzle 10.

[0038] As Figure 3 shown in the structural schematic diagram of the third coupling head assembly, in one embodiment, the coupling head assembly further includes: an aluminum housing 50; wherein, the nozzle 10, the laser 20, the focusing lens barrel 30, and the lifting module 40 are all arranged within the aluminum housing.

[0039] The optical path before and after the laser beam of the lifting module 40 and the laser 20 passes through the focusing lens barrel 30, the focusing lens barrel 30 itself, and the nozzle 10 are all inside the aluminum housing 50. Among them, the position of the nozzle 10 is kept fixed. There is a vertically movable slider 41 in the lifting module 40. The focusing lens barrel 30 is connected to the slider 41 in the lifting module 40 through a cantilever 42. The electric lifting component 43 drives the slider 41 to achieve vertical lifting, and the slider 41 drives the focusing lens barrel 30 to achieve vertical lifting, thereby changing the position of the focus.

[0040] In one embodiment, the coupling head assembly further includes: a temperature sensor 60; a signal transmission end of the temperature sensor 60 is connected to a first signal transmission end of the lifting module 40; a lifting portion in the lifting module 40 controls the focusing lens barrel 30 to move up and down based on the temperature signal collected by the temperature sensor 60. The temperature sensor 60 collects the temperature inside the coupling head assembly, thereby generating a corresponding temperature signal, and this temperature signal is finally transmitted to the lifting module 40 through the first signal transmission end of the lifting module 40 connected thereto, so as to control the lifting portion to move the focusing lens barrel 30 up and down according to the temperature signal.

[0041] In one embodiment, the coupling head assembly further includes: a focusing detector 70; a signal transmission end of the focusing detector 70 is connected to a second signal transmission end of the lifting module 40; a lifting portion in the lifting module 40 controls the focusing lens barrel 30 to move up and down based on the focusing signal collected by the focusing detector 70.

[0042] Since the coupling head assembly has an aluminum housing 50, the thermal expansion coefficient of aluminum is approximately 23.1x10^-6 mm / ℃, and the coupling head assembly rises by about 5℃ from room temperature to the working state, and this temperature value is collected by the temperature sensor 60. The height from the focusing lens barrel 30 to the laser beam focus in the coupling head assembly is approximately 100 mm, and the corresponding dimensional change is 500 * 5 * 23.1x10^-6 which is approximately equal to 0.1 mm. The lifting module 40 can move the corresponding dimension to offset the influence of temperature change on the focus position. The focusing condition of the laser beam can be detected by the focusing detector 70, and it can be judged whether the light spot at the nozzle 10 is the focus of the laser beam through the focusing signal collected by the focusing detector 70. If it is not the focus of the laser beam, then by controlling the lifting of the lifting module 40 to drive the lifting of the focusing lens barrel 30, the focus is adjusted to a suitable position of the nozzle 10.

[0043] As can be seen from the coupling head assembly provided by the embodiment of the present utility model, the lifting module provided in the coupling head assembly drives the focusing lens barrel to move. When the temperature rises, the position of the focusing lens barrel can be adjusted by the lifting module, so as to ensure that the focus of the laser beam converges to a suitable position of the nozzle, solve the problem of focus position deviation caused by the temperature rise of the coupling head, and reduce the probability of the nozzle being damaged by the laser beam.

[0044] The embodiment of the present utility model provides a water-guided laser cutting device, and this water-guided laser cutting device includes the coupling head assembly mentioned in the first aspect, wherein the coupling head assembly is arranged at the laser emission end of the water-guided laser cutting device.

[0045] The water-guided laser cutting device uses a lifting module provided in the built-in coupling head assembly to drive the focusing lens barrel to move. When the temperature rises, the lifting module can be used to adjust the position of the focusing lens barrel, so as to ensure that the focus of the laser beam converges to a suitable position of the nozzle, solve the problem of focus position deviation caused by the temperature rise of the coupling head, and reduce the probability of the nozzle being damaged by the laser beam.

[0046] For the coupling head assembly in the water-guided laser cutting device provided by the embodiment of the present invention, its implementation principle and the technical effects generated are the same as those of the foregoing coupling head assembly embodiment. For a brief description, for the parts not mentioned in the device embodiment part, reference may be made to the corresponding content in the foregoing embodiment.

[0047] In several embodiments provided in the present application, it should be understood that the disclosed system and device can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some communication interfaces, and the indirect coupling or communication connection of the devices or units may be in an electrical, mechanical or other forms.

[0048] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0049] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit exists physically alone, or two or more units can be integrated in one unit.

[0050] When the above-mentioned functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such an understanding, the technical solution of the present utility model, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present utility model. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0051] Finally, it should be noted that the above-mentioned embodiments are only specific implementation manners of the present utility model, used to illustrate the technical solution of the present utility model, rather than limiting it. The protection scope of the present utility model is not limited thereto. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present utility model can still modify the technical solutions recorded in the foregoing embodiments or easily conceive of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes, or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model, and should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A coupling head assembly, characterized in that: The coupling head assembly is arranged at the laser emitting end of the water-guided laser cutting equipment, and the coupling head assembly comprises: a nozzle, a laser, a focusing lens barrel and a lifting module; The laser is fixed on the upper part of the focusing lens barrel; the nozzle is located at the focal position of the lower part of the focusing lens barrel; the laser emitted by the laser is focused at the nozzle position after passing through the focusing lens barrel; The lifting part of the lifting module is rigidly connected to the focusing lens barrel; the focusing lens barrel moves up and down under the action of the lifting part.

2. The coupling head assembly according to claim 1, characterized in that: The lifting module is provided with a slider; the slider is rigidly connected to the focusing lens barrel; the slider slides in the lifting part.

3. The coupling head assembly according to claim 2, characterized in that: A cantilever is arranged in the lifting module; one end of the cantilever is connected to the slider, and the other end of the cantilever is connected to the focusing lens barrel.

4. The coupling head assembly according to claim 2, characterized in that: The lifting module is provided with an electric lifting component; the movable end of the electric lifting component is connected to the slider.

5. The coupling head assembly according to claim 1, characterized in that: The lifting module is provided with a first guide rail; the first guide rail is vertically arranged in the movable area of ​​the lifting part, and the lifting part is fixed on the first guide rail.

6. The coupling head assembly according to claim 1, characterized in that: A second guide rail is arranged outside the focusing lens barrel; the second guide rail is arranged in the active area of ​​the focusing lens barrel, and the focusing lens barrel is fixed on the second guide rail.

7. The coupling head assembly according to claim 1, characterized in that: The coupling head assembly further includes: an aluminum shell; wherein the nozzle, the laser, the focusing lens barrel and the lifting module are all arranged inside the aluminum shell.

8. The coupling head assembly according to claim 1, characterized in that: The coupling head assembly further includes: a temperature sensor; a signal transmission end of the temperature sensor is connected to a first signal transmission end of the lifting module; The lifting part in the lifting module controls the focusing lens barrel to move up and down based on the temperature signal collected by the temperature sensor.

9. The coupling head assembly according to claim 1, characterized in that: The coupling head assembly further includes: a focusing detector; a signal transmission end of the focusing detector is connected to a second signal transmission end of the lifting module; The lifting part in the lifting module controls the focusing lens barrel to move up and down based on the focusing signal collected by the focusing detector.

10. A water-guided laser cutting device, characterized in that: The water-conducting laser cutting device comprises the coupling head assembly according to any one of claims 1 to 9, wherein the coupling head assembly is arranged at the laser emitting end of the water-conducting laser cutting device.

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