Double-beam synchronous following anti-reflection device for laser forging printing

Abstract

The invention discloses a double-beam synchronous following anti-reflection device for laser forging printing, which is characterized in that the specific wavelength combination of 1064nm powder bed cladding laser and 532nm green ultrafast strengthening laser is adopted to impact a fusion layer, and a special reflecting coating with the wavelength of 532nm is coated on a scanning galvanometer mechanism; therefore, the coating can selectively transmit laser of 1064nm and efficiently reflect laser of 532nm at the same time by utilizing the obvious wavelength difference between the two; on the basis, diffuse reflection of green ultrafast laser can be selectively isolated, so that damage to the laser caused by return light is fundamentally avoided, stable work of equipment in a long-time and high-power following mode is ensured, and therefore, the device is very suitable for large-scale application and popularization in the technical field of laser forging printing.

Description

Technical Field

[0001] This invention belongs to the field of laser forging printing technology, and specifically relates to a dual-beam synchronous following anti-reflection device for laser forging printing. Background Technology

[0002] Laser forging printing is a technology that uses dual laser beams (i.e., powder bed melting laser and ultrafast strengthening laser) for following or intermittent scanning during the printing process. It uses ultrafast laser to impact the molten layer, thereby suppressing defects such as thermal cracks and reducing unfused particles, and thus improving the fatigue performance of additively manufactured workpieces.

[0003] Currently, laser forging printing technology typically employs a dual-infrared laser configuration, consisting of a 1064 nm powder bed melting laser and a 1030 nm ultrafast intensifying laser. However, during development, it was discovered that when the dual lasers switch to follow mode—where the ultrafast laser follows the powder bed melting laser at fixed intervals—the wavelengths of the two lasers are quite similar. Therefore, it is difficult to completely eliminate the diffuse reflection generated by the ultrafast laser during processing using conventional optical methods. Consequently, the diffuse reflection from the ultrafast laser is reflected back to the laser via the galvanometer, causing damage. Thus, existing laser forging printing equipment struggles to support long-term, high-power ultrafast laser following operations. Therefore, based on the aforementioned shortcomings, there is an urgent need to develop a dual-beam synchronous following anti-reflection device suitable for laser forging printing to overcome this technical obstacle. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-beam synchronous following anti-reflection device for laser forging printing, in order to solve the problem in the prior art where diffuse reflection generated by ultrafast lasers is reflected back to the laser via the galvanometer, thereby causing damage to the laser.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, a dual-beam synchronous following anti-reflection device for laser forging printing is provided, comprising: Powder bed cladding laser and green ultrafast enhanced laser, wherein the wavelength of the laser emitted by the powder bed cladding laser is 1064nm, and the wavelength of the ultrafast laser emitted by the green ultrafast enhanced laser is 532nm. A scanning galvanometer mechanism is provided, wherein the laser emitted by the powder bed cladding laser and the ultrafast laser emitted by the green ultrafast enhanced laser are respectively emitted to the laser forging printing stage through a scanning galvanometer mechanism. The surface of the scanning galvanometer mechanism facing the laser forging printing stage is provided with a 532 nm reflective coating, and the reflective coating is used to transmit the laser emitted by the powder bed cladding laser and to reflect the reflected light generated by the ultrafast laser emitted to the laser forging printing stage.

[0006] Based on the above disclosure, the dual-beam synchronous following anti-reflection device for laser forging printing provided by this invention employs a specific wavelength combination of a 1064nm powder bed cladding laser and a 532nm green ultrafast enhanced laser to impact the molten layer, and coats the scanning galvanometer mechanism with a reflective coating specifically for the 532nm wavelength. Thus, this invention utilizes the significant wavelength difference between the two, allowing the coating to selectively transmit the 1064nm laser (ensuring normal processing) while simultaneously and efficiently reflecting the 532nm laser (eliminating the risk of back reflection from the optical path). Based on this, this invention can selectively isolate the diffuse reflection of the green ultrafast laser, thereby fundamentally avoiding damage to the laser from reflected light, and ensuring stable operation of the equipment in long-term, high-power following mode. Therefore, this invention is highly suitable for large-scale application and promotion in the field of laser forging printing technology.

[0007] One possible design also includes: an optical path isolation module; The optical path isolation module is provided in the optical path of the ultrafast laser emitted by the green ultrafast enhanced laser. The optical path isolation module is used to absorb or deflect reflected beams that are not isolated by the target coating, and the target coating is the reflective coating on the scanning galvanometer mechanism corresponding to the green ultrafast enhanced laser.

[0008] In one possible design, the optical path isolation module employs a reflective film.

[0009] In one possible design, the scanning galvanometer mechanism includes: a scanning galvanometer assembly, a base, and a housing; The scanning galvanometer assembly has a reflective coating on its surface facing the laser forging printing stage. The scanning galvanometer assembly is mounted on the base, which is disposed within the housing to encapsulate the base.

[0010] In one possible design, the lasers emitted by the powder bed cladding laser and the green ultrafast enhanced laser are coupled to their respective scanning galvanometer mechanisms via optical fibers or free-space optical paths.

[0011] In one possible design, a control module is also included, wherein the control module includes a synchronization control unit electrically connected to the powder bed cladding laser and the green ultrafast enhanced laser, for adjusting the output time and scanning speed of the powder bed cladding laser and the green ultrafast enhanced laser according to a preset scanning time interval and a preset scanning speed.

[0012] In one possible design, it also includes: a feedback module, wherein the feedback module is used to collect the reflected light signal during the laser forging printing process and determine the actual laser light intensity based on the reflected light signal; The feedback module is also used to determine laser parameter adjustment information based on the actual laser intensity, so as to adjust the laser power and scanning speed of the powder bed cladding laser and the green ultrafast enhanced laser through the laser parameter adjustment information.

[0013] In one possible design, the feedback module includes: a real-time monitoring unit and a feedback control unit; The real-time monitoring unit is used to collect the reflected light signal during the laser forging printing process, and to filter and convert the reflected light signal to analog-to-digital conversion, so as to obtain the actual laser light intensity after analog-to-digital conversion and transmit it to the feedback control unit. The feedback control unit is used to obtain the optimal laser intensity and determine the laser parameter adjustment information based on the actual laser intensity and the optimal laser intensity.

[0014] In one possible design, the real-time monitoring unit employs a photoelectric sensor.

[0015] In one possible design, the feedback module is used to acquire reflected light signals at a preset microsecond frequency, so as to adjust the laser power and scanning speed of the powder bed cladding laser and the green ultrafast enhanced laser at the preset microsecond frequency.

[0016] Beneficial effects: (1) The dual-beam synchronous following anti-reflection device for laser forging printing provided by the present invention uses a specific wavelength combination of 1064nm powder bed cladding laser and 532nm green ultrafast enhanced laser to impact the molten layer, and coats a reflective coating specifically for the 532nm wavelength on the scanning galvanometer mechanism. In this way, the present invention utilizes the significant wavelength difference between the two, so that the coating can selectively transmit the 1064nm laser (ensuring normal processing) and simultaneously efficiently reflect the 532nm laser (eliminating the risk of back reflection from the optical path). Based on this, the present invention can selectively isolate the diffuse reflection of the green ultrafast laser, thereby fundamentally avoiding damage to the laser from the back light, and thus ensuring the stable operation of the equipment in the long-term, high-power following mode. Therefore, the present invention is very suitable for large-scale application and promotion in the field of laser forging printing technology.

[0017] (2) Improved process stability and processing quality; The present invention integrates an optical path isolation module and a synchronous control unit to form a multi-level protection system. This system not only further eliminates residual reflected light, but also ensures the precise coordination of the two beams in time and space, thereby significantly improving the stability and repeatability of the laser forging printing process. Therefore, it is beneficial to obtain parts with fewer defects and better fatigue performance.

[0018] (3) The system structure is optimized and the practicality is strong. The core anti-reflection function of the present invention is achieved through targeted wavelength selection and coating design. There is no need to introduce complex external optical path isolation devices. The structure is simple and compact. Moreover, the solution is easy to integrate into existing equipment. It can effectively solve key technical bottlenecks without significantly increasing costs or optical path complexity. Therefore, it has high engineering application value. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a dual-beam synchronous following anti-reflection device for laser forging printing provided in an embodiment of the present invention.

[0020] Figure label: 1-Powder bed cladding laser; 2-Green ultrafast enhanced laser; 3-Scanning galvanometer mechanism; 4-Reflective coating; 5-Optical path isolation module; 6-Synchronization control unit; 7-First channel; 8-Second channel. Detailed Implementation

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0022] It should be understood that although the terms first, second, etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of the invention.

[0023] It should be understood that the term "and / or" that may appear in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" that may appear in this document describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " that may appear in this document generally indicates that the related objects before and after it are in an "or" relationship.

[0024] Example: See Figure 1 As shown, the dual-beam synchronous following anti-reflection device for laser forging printing provided in this embodiment may include, but is not limited to: a powder bed cladding laser 1, a green ultrafast strengthening laser 2 (i.e., an ultrafast laser), a scanning galvanometer mechanism 3, a reflection protection structure, and a control module; wherein, for example, the wavelength of the laser emitted by the powder bed cladding laser 1 is 1064nm (i.e., emitting infrared powder bed cladding laser), and the wavelength of the ultrafast laser emitted by the green ultrafast strengthening laser 2 is 532nm, that is, a powder bed cladding laser with a wavelength of 1064nm and a green ultrafast strengthening laser with a wavelength of 532nm are used to impact the molten layer.

[0025] Also see Figure 1 As shown, the laser emitted by the powder bed cladding laser 1 and the ultrafast laser emitted by the green ultrafast strengthening laser 2 are respectively emitted to the laser forging printing stage through a scanning galvanometer mechanism 3. For example, the lasers emitted by the powder bed cladding laser 1 and the green ultrafast strengthening laser 2 are coupled to their respective scanning galvanometer mechanisms 3 through optical fibers or free space optical paths, so as to use dual lasers (i.e., powder bed cladding laser and ultrafast laser) for following or intermittent scanning, thereby impacting the molten layer with ultrafast laser, thereby achieving the purpose of suppressing hot cracks and reducing defects such as unfused particles.

[0026] In this embodiment, the free space optical path refers to the optical system path through which a laser beam is guided, shaped, steered, and transmitted in air (or vacuum) by a series of discrete optical elements (such as mirrors, lenses, beam splitters, etc.) and finally reaches the target position. This method is a common technology for laser transmission, and its structure will not be described in detail.

[0027] Furthermore, to avoid the problem that diffuse reflection generated by the ultrafast laser will be reflected back to the laser via the galvanometer when the dual-beam laser switches to the follower mode (i.e., when the ultrafast laser follows the powder bed cladding laser at a fixed interval, causing damage to the laser), this embodiment also provides a high-reflectivity reflective coating 4 to selectively transmit and reflect the laser. Specifically, the surface of the scanning galvanometer mechanism 3 facing the laser forging printing stage is provided with a 532 nm reflective coating 4. This reflective coating 4 is used to transmit the laser emitted by the powder bed cladding laser 1 and to reflect the back light generated by the ultrafast laser emitted onto the laser forging printing stage. The transmittance of this coating for 1064 nm wavelength laser is higher than 95%, and the reflectance for 532 nm wavelength laser is higher than 99%. Based on this, the back light that may be generated by the green ultrafast laser can be effectively reflected while transmitting the powder bed cladding laser.

[0028] In one specific embodiment, for example, the aforementioned reflective coating 4 is applied to the surface of the galvanometer in the scanning galvanometer mechanism 3 (i.e., the surface of the galvanometer facing the laser forging printing stage). In this way, the reflective coating applied to the galvanometer can be used to achieve selective reflection and transmission functions.

[0029] Through the aforementioned design, this embodiment employs a specific wavelength combination of a 1064nm powder bed cladding laser and a 532nm green ultrafast enhanced laser to impact the molten layer, and coats the scanning galvanometer mechanism with a reflective coating specifically for the 532nm wavelength. This embodiment utilizes the significant wavelength difference between the two, allowing the coating to selectively transmit the 1064nm laser (ensuring normal processing) while simultaneously efficiently reflecting the 532nm laser (eliminating the risk of backscattering in the optical path). Based on this, the device provided in this embodiment can selectively isolate the diffuse reflection of the green ultrafast laser, thereby fundamentally avoiding damage to the laser from reflected light and ensuring stable operation of the equipment in long-term, high-power following mode.

[0030] In one possible design, the following provides a more detailed construction of the aforementioned dual-beam synchronous following anti-reflection device for laser forging printing: Optionally, one structure of the scanning galvanometer mechanism 3 may be disclosed first: In specific implementation, the scanning galvanometer mechanism 3 may include, but is not limited to, a scanning galvanometer assembly, a base, and a housing; wherein, the surface of the scanning galvanometer assembly facing the laser forging printing stage is provided with the reflective coating 4, the scanning galvanometer assembly is mounted on the base, and the base is disposed inside the housing; thus, the base can be encapsulated by the housing, thereby forming a stable optomechanical structure; furthermore, the scanning galvanometer assembly (i.e., the scanning galvanometer system) is a commonly used vector scanning device, the principle of which will not be elaborated further.

[0031] After describing the structure of the scanning galvanometer mechanism 3, one embodiment of the aforementioned reflection protection structure is disclosed below: See Figure 1 As shown, the aforementioned reflection protection structure may, but is not limited to, employ: an optical path isolation module 5; wherein, the optical path isolation module 5 is provided in the optical path of the ultrafast laser emitted by the green ultrafast enhanced laser 2, and the optical path isolation module 5 is used to absorb or deflect reflected beams that are not isolated by the target coating; in this embodiment, the aforementioned target coating is the reflective coating on the scanning galvanometer mechanism 3 corresponding to the green ultrafast enhanced laser 2.

[0032] Meanwhile, the aforementioned dual-beam synchronous following anti-reflection device may include optical path channels, i.e., the laser emission ports of the green ultrafast enhanced laser 2 and the powder bed cladding laser 1 are respectively connected to optical path channels, wherein, see Figure 1 As shown, the optical path channel may include, but is not limited to, the first channel 7 and the second channel 8 connected sequentially from top to bottom. The aforementioned optical path isolation module 5 is located in the second channel 8 of the optical path channel corresponding to the green ultrafast enhanced laser 2. Thus, an independent optical path isolation module is set in the ultrafast laser optical path to further absorb or deflect any residual reflected light that may not be completely eliminated by the galvanometer coating (i.e., the aforementioned reflective coating 4). Based on this, the design structure constitutes a multi-layered protection system, which, as an effective supplement to the core coating technology, can greatly improve the reliability and robustness of the entire system, thereby ensuring the absolute safety of the equipment under high power and long-term operation.

[0033] Optionally, the aforementioned optical path isolation module may, but is not limited to, using a reflective film; of course, the foregoing examples are merely illustrative, and this embodiment is not limited thereto.

[0034] After detailing the structure of the optical path isolation module, the detailed construction of the control module is given below: In a specific implementation, for example, the control module includes a synchronization control unit 6, wherein the synchronization control unit 6 is electrically connected to the powder bed cladding laser 1 and the green ultrafast enhanced laser 2, and is used to adjust the light emission time and scanning speed of the powder bed cladding laser 1 and the green ultrafast enhanced laser 2 according to a preset scanning time interval and a preset scanning speed; optionally, the synchronization control unit can be set in the first channel 7 of the optical path channel corresponding to the green ultrafast enhanced laser 2, such as... Figure 1 As shown.

[0035] In this embodiment, the synchronization control unit may be, but is not limited to, a PLC. It controls the light emission time and scanning speed of the two lasers by receiving the preset scanning time interval and preset scanning speed from the host computer. At the same time, it is also electrically connected to the scanning galvanometer mechanism 3. By controlling the two lasers and the scanning galvanometer mechanism 3, the precise timing coordination and scanning path synchronization of the two beams in the follow mode can be achieved, thereby ensuring that the impact strengthening is completed before the molten layer solidifies.

[0036] Furthermore, the dual-beam synchronous following anti-reflection device provided in this embodiment is also equipped with a feedback module. This feedback module is used to achieve real-time adjustment of the laser parameters of the two lasers during processing. Its specific working process is as follows: The feedback module is used to collect the reflected light signal during the laser forging printing process and determine the actual laser intensity based on the reflected light signal. Then, based on the actual laser intensity, the laser parameter adjustment information is determined so as to adjust the laser power and scanning speed of the powder bed cladding laser 1 and the green ultrafast strengthening laser 2.

[0037] Optionally, the feedback module may include, but is not limited to, a real-time monitoring unit and a feedback control unit; wherein, the real-time monitoring unit is used to collect the reflected light signal during the laser forging printing process, and to perform filtering and analog-to-digital conversion processing on the reflected light signal, so as to obtain the actual laser light intensity after analog-to-digital conversion processing and transmit it to the feedback control unit; then, the feedback control unit is used to obtain the optimal laser light intensity, and to determine the laser parameter adjustment information based on the actual laser light intensity and the optimal laser light intensity; thus, the parameters of the two lasers can be adjusted according to the laser parameter adjustment information.

[0038] In this embodiment, the aforementioned real-time monitoring unit may, but is not limited to, employ a photoelectric sensor to collect reflected light signals. The real-time monitoring unit may also include devices such as filters and analog-to-digital converters to perform subsequent signal processing after the reflected light signals are collected. Simultaneously, the feedback module may, but is not limited to, be used to collect reflected light signals at a preset microsecond frequency (e.g., 1 microsecond, 2 microseconds, etc.) to adjust the laser power and scanning speed of the powder bed cladding laser 1 and the green ultrafast enhanced laser 2 according to the preset microsecond frequency.

[0039] In this embodiment, the aforementioned dynamic adjustment process is based on a simple negative feedback principle: when the reflected light intensity is detected to be continuously higher than the target value (i.e., the optimal laser light intensity), the system determines that the energy input is insufficient and will immediately increase the laser power or decrease the scanning speed to promote material melting and reduce reflection; conversely, when the light intensity is continuously too low, it determines that overheating may occur and will decrease the power or increase the scanning speed to prevent the molten pool from becoming unstable; in this way, the system continuously performs this "monitoring-judgment-adjustment" cycle at a frequency of microseconds, so that the processing process can adapt to changes in the material surface state and always remain within the optimal process window with high stability; for example, the system can preset different laser light intensity differences (the difference between the actual laser light intensity and the optimal laser light intensity), corresponding to the laser power and scanning speed. In actual use, the laser parameter adjustment information can be obtained by matching and searching based on the real-time calculated difference.

[0040] Therefore, based on the foregoing explanation, the working process of the dual-beam synchronous following anti-reflection device for laser forging printing provided in this embodiment is as follows: During operation, the powder bed cladding laser emitted by powder bed cladding laser 1 scans the molten powder layer along a preset path, while the ultrafast strengthening laser emitted by green ultrafast strengthening laser 2 follows the scan with a set time delay and spatial offset. At the same time, the reflective coating 4 can effectively prevent the 532nm laser from returning to the laser interior after diffuse reflection in the processing area, avoiding optical damage. The synchronization control unit can adjust the timing of dual laser emission and scanning speed in real time, thereby ensuring that the impact strengthening effect is completed before the molten layer solidifies. Finally, the real-time monitoring unit and feedback control unit are used to detect the intensity of reflected light and dynamically adjust the laser parameters, thereby further improving the anti-reflection capability and ensuring process stability.

[0041] Based on the detailed structural description of the dual-beam synchronous following anti-reflection device for laser forging printing described above, the present invention has the following advantages: (1) Effectively solve reflection damage and ensure stable operation at high power: This invention uses a wavelength combination of 1064 nm infrared powder bed cladding laser and 532 nm green ultrafast laser, and a proprietary 532 nm high reflectivity coating on the surface of the galvanometer to selectively isolate the diffuse reflection of the green ultrafast laser, thereby fundamentally avoiding damage to the laser from the reflected light, and thus ensuring that the equipment works stably in long-term, high-power following mode.

[0042] (2) Improved process stability and processing quality; The present invention integrates optical path isolation module and synchronous control unit to form a multi-level protection system; This system not only further eliminates residual reflected light, but also ensures the precise coordination of the two beams in time and space, thereby significantly improving the stability and repeatability of the laser forging printing process, which is conducive to obtaining parts with fewer defects and better fatigue performance.

[0043] (3) The system structure is optimized and highly practical. The core anti-reflection function of the present invention is achieved through targeted wavelength selection and coating design, without the need to introduce complex external optical path isolation devices, and the structure is simple and compact. At the same time, the solution is easy to integrate into existing equipment, and can effectively solve key technical bottlenecks without significantly increasing costs or optical path complexity. Therefore, the present invention has high engineering application value.

[0044] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dual-beam synchronous following anti-reflection device for laser forging printing, characterized in that, include: Powder bed cladding laser (1) and green ultrafast enhanced laser (2), wherein the wavelength of the laser emitted by the powder bed cladding laser (1) is 1064nm and the wavelength of the ultrafast laser emitted by the green ultrafast enhanced laser (2) is 532nm. The scanning galvanometer mechanism (3) is used to transmit the laser emitted by the powder bed cladding laser (1) and the ultrafast laser emitted by the green ultrafast enhanced laser (2) to the laser forging printing stage through the scanning galvanometer mechanism (3). The surface of the scanning galvanometer mechanism (3) facing the laser forging printing stage is provided with a 532nm reflective coating (4). The reflective coating (4) is used to transmit the laser emitted by the powder bed cladding laser (1) and to reflect the back light generated by the ultrafast laser emitted to the laser forging printing stage.

2. The dual-beam synchronous following anti-reflection device for laser forging printing according to claim 1, characterized in that, Also includes: Optical path isolation module (5); The optical path isolation module (5) is provided in the optical path of the ultrafast laser emitted by the green ultrafast laser (2). The optical path isolation module (5) is used to absorb or deflect the reflected beam that is not isolated by the target coating. The target coating is the reflective coating (4) on the scanning galvanometer mechanism (3) corresponding to the green ultrafast laser (2).

3. The dual-beam synchronous following anti-reflection device for laser forging printing according to claim 2, characterized in that, The optical path isolation module (5) uses a reflective film.

4. The dual-beam synchronous following anti-reflection device for laser forging printing according to claim 1, characterized in that, The scanning galvanometer mechanism (3) includes: a scanning galvanometer assembly, a base, and a housing; The surface of the scanning galvanometer assembly facing the laser forging printing stage is provided with the reflective coating (4), wherein the scanning galvanometer assembly is mounted on the base, and the base is disposed inside the housing so as to encapsulate the base through the housing.

5. A dual-beam synchronous following anti-reflection device for laser forging printing according to claim 1, characterized in that, The lasers emitted by the powder bed cladding laser (1) and the green ultrafast enhanced laser (2) are coupled to their respective scanning galvanometer mechanisms (3) via optical fibers or free space optical paths.

6. The dual-beam synchronous following anti-reflection device for laser forging printing according to claim 1, characterized in that, Also includes: The control module includes a synchronization control unit, which is electrically connected to the powder bed cladding laser (1) and the green ultrafast enhanced laser (2) to adjust the output time and scanning speed of the powder bed cladding laser (1) and the green ultrafast enhanced laser (2) according to a preset scanning time interval and a preset scanning speed.

7. A dual-beam synchronous following anti-reflection device for laser forging printing according to claim 6, characterized in that, Also includes: A feedback module is provided, wherein the feedback module is used to collect the reflected light signal during the laser forging printing process and determine the actual laser light intensity based on the reflected light signal; The feedback module is also used to determine the laser parameter adjustment information based on the actual laser intensity, so as to adjust the laser power and scanning speed of the powder bed cladding laser (1) and the green ultrafast enhanced laser (2) through the laser parameter adjustment information.

8. A dual-beam synchronous following anti-reflection device for laser forging printing according to claim 7, characterized in that, The feedback module includes: a real-time monitoring unit and a feedback control unit; The real-time monitoring unit is used to collect the reflected light signal during the laser forging printing process, and to filter and convert the reflected light signal to analog-to-digital conversion, so as to obtain the actual laser light intensity after analog-to-digital conversion and transmit it to the feedback control unit. The feedback control unit is used to obtain the optimal laser intensity and determine the laser parameter adjustment information based on the actual laser intensity and the optimal laser intensity.

9. A dual-beam synchronous following anti-reflection device for laser forging printing according to claim 8, characterized in that, The real-time monitoring unit uses a photoelectric sensor.

10. A dual-beam synchronous following anti-reflection device for laser forging printing according to claim 7, characterized in that, The feedback module is used to collect reflected light signals at a preset microsecond frequency, so as to adjust the laser power and scanning speed of the powder bed cladding laser (1) and the green ultrafast enhanced laser (2) at the preset microsecond frequency.

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