Multi-ring light spot laser and laser processing equipment
By designing a multi-ring laser, the problem of uneven energy distribution of fiber lasers in the cutting and welding of thick plates was solved, resulting in better processing effects and meeting the needs of heavy industry for cutting and welding thick plates.
Patent Information
- Application Number
- CN202520579117.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-31
AI Technical Summary
In existing applications of fiber lasers for cutting and welding thick plates, the energy distribution of the laser spot is too concentrated, resulting in problems such as rough end faces, slag buildup at the bottom, excessive taper of the cross-section, slag spatter, and poor weld appearance.
A multi-ring spot laser is used. By adjusting the output power and coupling number of the central optical path module and sub-optical path module, combined with a multi-clad output fiber and an output head, the energy distribution of the multi-ring spot can be flexibly adjusted. The lasers from the central optical path module and sub-optical path module are coupled to the core and transmission cladding of the multi-clad output fiber, respectively, and the multi-ring spot is output through the output head.
It improves the processing effect of laser in cutting and welding thick plates, avoids problems such as rough end face, slag on the bottom, excessive cross-sectional taper and slag spatter, and meets the application needs of heavy industry.
Smart Images
Figure CN223932812U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to laser technology field especially relates to a multi-ring light spot laser and laser processing equipment. BACKGROUND
[0002] Fiber laser is widely applied to material processing field because of its high beam quality and high efficiency. The output light spot of fiber laser refers to the specific light spot mode formed when fiber laser outputs laser, which is generally a Gaussian distribution or a light spot similar to flat top distribution controlled by energy uniformity. This kind of light spot can meet normal cutting and other applications.
[0003] At present, in the application scene of thick plate material cutting and welding in heavy industry field, the existing fiber laser is prone to problems such as end surface not smooth enough, bottom slag, too large section taper in thick plate cutting application due to too concentrated light spot energy distribution and short Rayleigh length; and problems such as spatter of welding slag, poor appearance of weld, and insufficient penetration in thick plate welding application. SUMMARY
[0004] The utility model discloses a multi-ring light spot laser and laser processing equipment to solve the problems of the existing fiber laser, such as end surface not smooth enough, bottom slag, too large section taper in thick plate cutting application due to too concentrated light spot energy distribution and short Rayleigh length, and problems such as spatter of welding slag, poor appearance of weld, and insufficient penetration in thick plate welding application.
[0005] To achieve the above purpose, the utility model adopts the following technical scheme:
[0006] On the one hand, the utility model provides a kind of multi-ring light spot laser, comprising:
[0007] Center light path module and sub light path module, the output power of the center light path module and the sub light path module can be adjusted and set;The sub light path module includes at least one;
[0008] First beam combiner, the input end of the first beam combiner is connected to the center light path module and the sub light path module;
[0009] Multi-clad output fiber, the multi-clad output fiber is connected to the output end of the first beam combiner;The multi-clad output fiber includes fiber core, at least one transmission cladding arranged outside the fiber core, and the fiber core corresponds to the center light path module, and the transmission cladding corresponds to at least one sub light path module;
[0010] Output head, the output head transmission connection is connected to the multi-clad output fiber.
[0011] As an alternative to the aforementioned multi-ring spot laser, the central optical path module includes a secondary central module, at least one secondary sub-module, a second beam combiner, and a secondary output fiber; the input end of the second beam combiner is connected to the secondary central module and the secondary sub-module; the two ends of the secondary output fiber are respectively connected to the output end of the second beam combiner and the input end of the first beam combiner.
[0012] As an alternative to the aforementioned multi-ring spot laser, the number of secondary central modules is 3 to 7.
[0013] As an alternative to the aforementioned multi-ring spot laser, the sub-optical path modules corresponding to the transmission cladding include 6 to 12 modules.
[0014] As an alternative to the aforementioned multi-ring spot laser, the multi-ring spot laser further includes a first cladding optical stripper, which is connected between the multi-clad output fiber and the output head, and is used to perform cladding optical stripping on the multi-clad output fiber.
[0015] As an alternative to the aforementioned multi-ring spot laser, the multi-ring spot laser further includes a spot control device, which is connected between the first cladding stripper and the output head.
[0016] As an alternative to the aforementioned multi-ring spot laser, the multi-ring spot laser further includes a second cladding optical stripper, which is connected between the spot control device and the output head.
[0017] As an alternative to the aforementioned multi-ring spot laser, the output power of the central optical path module is 25kW to 40kW.
[0018] As an alternative to the aforementioned multi-ring spot laser, the total power of the multi-ring spot laser is 80kW to 160kW.
[0019] On the other hand, this utility model provides a laser processing equipment, including the multi-ring spot laser as described above.
[0020] The beneficial effects of this utility model are as follows:
[0021] The multi-ring laser includes a central optical path module, a sub-optical path module, a first beam combiner, a multi-clad output fiber, and an output head. The input end of the first beam combiner is connected to the central optical path module and the sub-optical path module. The multi-clad output fiber is connected to the output end of the first beam combiner. The output head is connected to the multi-clad output fiber. The multi-clad output fiber includes a fiber core and at least one transmission cladding outside the fiber core. The fiber core corresponds to the central optical path module, and the transmission cladding corresponds to at least one sub-optical path module. Thus, the first beam combiner can couple the lasers from the central optical path module and the sub-optical path module into the fiber core and transmission cladding of the multi-clad output fiber, respectively, and output a multi-ring laser beam through the output head. The output power of both the central optical path module and the sub-optical path module can be adjusted, and the sub-optical path module includes at least one. By adjusting the output power of the central optical path module and the sub-optical path module, as well as adjusting the number of couplings of the sub-optical path modules, the energy distribution of the multi-ring spot can be adjusted to meet different application scenarios and improve the processing effect of the laser in the laser processing of thick plate materials. Attached Figure Description
[0022] Fig. 1 This is a schematic diagram of the structure of the multi-ring spot laser provided in an embodiment of the present invention;
[0023] Fig. 2 This is a schematic diagram of the structure of the central optical path module provided in an embodiment of the present invention;
[0024] Fig. 3 This is a schematic diagram of the structure of the multi-clad output optical fiber provided in an embodiment of the present invention.
[0025] In the picture:
[0026] 1. Central optical path module; 11. Secondary central module; 12. Secondary sub-module; 13. Secondary combiner; 14. Secondary output fiber; 2. Sub-optical path module; 3. First combiner; 4. Multi-clad output fiber; 41. Fiber core; 42. Transmission cladding; 43. Isolation layer; 5. Output head; 6. First cladding optical stripper; 7. Beam control device; 8. Second cladding optical stripper. Detailed Implementation
[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0031] like Figs. 1-3 As shown, this embodiment provides a multi-ring spot laser for outputting multi-ring spots.
[0032] The multi-ring laser includes a central optical path module 1, a sub-optical path module 2, a first beam combiner 3, a multi-clad output fiber 4, and an output head 5. The input end of the first beam combiner 3 is connected to the central optical path module 1 and the sub-optical path module 2. The multi-clad output fiber 4 is connected to the output end of the first beam combiner 3. The output head 5 is connected to the multi-clad output fiber 4. The multi-clad output fiber 4 includes a fiber core 41 and at least one transmission cladding 42 disposed outside the fiber core 41. The fiber core 41 corresponds to the central optical path module 1, and the transmission cladding 42 corresponds to at least one sub-optical path module 2. Thus, the first beam combiner 3 can couple the laser from the central optical path module 1 and the laser from the sub-optical path module 2 into the fiber core 41 and the transmission cladding 42 of the multi-clad output fiber 4, respectively, and output a multi-ring laser beam through the output head 5.
[0033] The output power of both the central optical path module 1 and the sub-optical path module 2 can be adjusted. The sub-optical path module 2 includes at least one sub-optical path module. By adjusting the output power of the central optical path module 1 and the sub-optical path module 2, as well as the number of couplings of the sub-optical path module 2, the energy distribution of the multi-ring laser spot can be adjusted to meet different application scenarios. This avoids problems such as uneven end face, slag at the bottom, and excessively large cross-sectional taper that are prone to occur in thick plate cutting applications due to excessively concentrated laser spot energy distribution and short Rayleigh length, which can affect welding applications. This improves the processing effect of the laser in the laser processing of thick plate materials.
[0034] Specifically, when one transmission cladding 42 is provided outside the fiber core 41, the multi-clad output fiber 4 outputs a double-ring light spot; when two transmission claddings 42 are provided outside the fiber core 41, the multi-clad output fiber 4 outputs a triple-ring light spot; and when more transmission claddings 42 are provided outside the fiber core 41, the multi-clad output fiber 4 outputs a corresponding multi-ring light spot. Each transmission cladding 42 corresponds to at least one sub-optical path module 2, so that the maximum output power of each transmission cladding 42 is the sum of the output power of the corresponding total sub-optical path modules 2.
[0035] Furthermore, the sub-optical path module 2 corresponding to the transmission cladding 42 includes 6 to 12 modules, thereby adjusting the output laser power range of the multi-cladding output fiber 4 by changing the number of sub-optical path modules 2 connected to the first beam combiner 3. Optionally, the first beam combiner 3 may have 19 input branches, one of which is connected to the output branch of the central optical path module 1 to couple the laser from the central optical path module 1 to the core 41 of the multi-clad output fiber 4. The remaining input branches are connected one-to-one with the output branches of several sub-optical path modules 2. When the multi-clad output fiber 4 outputs a three-ring spot, six of the input branches can couple the lasers from the six sub-optical path modules 2 to the first transmission cladding 42 of the multi-clad output fiber 4, and the remaining 12 input branches can couple the lasers from the 12 sub-optical path modules 2 to the second transmission cladding 42 of the multi-clad output fiber 4. However, in actual multi-ring spot laser systems, it is usually not necessary to connect all branches of the first beam combiner 3 to the sub-optical path modules 2, but rather to select and use them according to the output laser power requirements.
[0036] Furthermore, an isolation layer 43 is provided between the fiber core 41 and the transmission cladding 42, as well as between different transmission claddings 42, so that the fiber core 41 and the transmission cladding 42 can be protected and the laser can be confined through the isolation layer 43.
[0037] like Fig. 2 As shown, the central optical path module 1 includes a secondary central module 11, at least one secondary sub-module 12, a second beam combiner 13, and a secondary output fiber 14. The input end of the second beam combiner 13 is connected to the secondary central module 11 and the secondary sub-module 12. The two ends of the secondary output fiber 14 are respectively connected to the output end of the second beam combiner 13 and the input end of the first beam combiner 3. Thus, the second beam combiner 13 can couple the laser from the secondary central module 11 and the laser from the secondary sub-module 12 into the secondary output fiber 14, thereby enabling the multi-ring spot laser to increase the total output power through multi-stage beam combining.
[0038] Furthermore, the number of secondary center modules 11 is 3 to 7, thereby adjusting the output laser power range of the central optical path module 1 by controlling the number of secondary center modules 11 connected.
[0039] Specifically, the output power of the central optical path module 1 is 25kW to 40kW. By adjusting the output power of the central optical path module 1, high-power output can be achieved, further increasing the output power of the multi-ring spot laser. Simultaneously, the total power of the multi-ring spot laser can reach 80kW to 160kW, meeting the needs of applications such as thick plate cutting and welding in heavy industry.
[0040] Furthermore, the multi-ring spot laser also includes a first cladding optical stripper 6, which is connected between the multi-clad output fiber 4 and the output head 5. The first cladding optical stripper 6 is used to perform cladding optical stripping on the multi-clad output fiber 4, thereby preventing residual cladding laser from affecting the beam quality of the multi-ring spot laser. Furthermore, the multi-ring spot laser also includes a spot control device 7, which is connected between the first cladding stripper and the output head 5. The spot control device 7 can apply a certain bending stress to the multi-clad output fiber 4, causing some laser light to transfer between the fiber core 41 and the transmission cladding 42, thus obtaining a spot energy distribution more suitable for this application scenario. Meanwhile, the multi-ring spot laser also includes a second cladding optical stripper 8, which is connected between the spot control device 7 and the output head 5. Since some of the transmitted laser will leak after passing through the spot control device 7, the second cladding optical stripper 8 can strip the laser from the multi-clad output fiber 4 after passing through the spot control device 7, thereby preventing residual cladding laser from affecting the final beam quality of the multi-ring spot laser.
[0041] This embodiment also provides a laser processing equipment, including the multi-ring spot laser as described above. By using the multi-ring spot laser as described above, the laser processing equipment can adjust the energy distribution of the multi-ring spot to meet different application scenarios. This avoids problems such as insufficient end face smoothness, bottom slag, and excessive cross-sectional taper that are prone to occur in thick plate cutting applications due to excessively concentrated spot energy distribution and short Rayleigh length, which in turn affect welding applications.
[0042] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A multi-ring spot laser, characterized in that, include: The central optical path module (1) and the sub-optical path module (2) are provided, and the output power of both the central optical path module (1) and the sub-optical path module (2) can be adjusted. The sub-optical path module (2) includes at least one. The first beam combiner (3) has its input end connected to the central optical path module (1) and the sub-optical path module (2); A multi-clad output fiber (4) is connected to the output end of the first combiner (3); the multi-clad output fiber (4) includes a fiber core (41) and at least one transmission cladding (42) disposed outside the fiber core (41), and the fiber core (41) corresponds to the central optical path module (1), and the transmission cladding (42) corresponds to at least one of the sub-optical path modules (2); Output head (5), the output head (5) is connected to the multi-clad output optical fiber (4).
2. The multi-ring spot laser according to claim 1, characterized in that, The central optical path module (1) includes a secondary central module (11), at least one secondary sub-module (12), a second combiner (13), and a secondary output fiber (14); the input end of the second combiner (13) is connected to the secondary central module (11) and the secondary sub-module (12); the two ends of the secondary output fiber (14) are respectively connected to the output end of the second combiner (13) and the input end of the first combiner (3).
3. The multi-ring spot laser according to claim 2, characterized in that, The number of the secondary central modules (11) is 3 to 7.
4. The multi-ring spot laser according to claim 1, characterized in that, The sub-optical path modules (2) corresponding to the transmission packet layer (42) include 6 to 12 modules.
5. The multi-ring spot laser according to claim 1, characterized in that, The multi-ring spot laser also includes a first cladding optical stripper (6), which is connected between the multi-clad output fiber (4) and the output head (5) and is used to perform cladding optical stripping on the multi-clad output fiber (4).
6. The multi-ring spot laser according to claim 5, characterized in that, The multi-ring laser also includes a spot control device (7), which is connected between the first cladding stripper and the output head (5).
7. The multi-ring spot laser according to claim 6, characterized in that, The multi-ring spot laser also includes a second cladding stripper (8), which is connected between the spot control device (7) and the output head (5).
8. The multi-ring spot laser according to any one of claims 1 to 7, characterized in that, The output power of the central optical path module (1) is 25kW to 40kW.
9. The multi-ring spot laser according to any one of claims 1 to 7, characterized in that, The total power of the multi-ring spot laser is 80kW to 160kW.
10. A laser processing equipment, characterized in that, Including the multi-ring spot laser as described in any one of claims 1 to 9.