In-situ array metal film stamping device and stamping method for additive manufacturing

Abstract

The invention discloses an in-situ array metal film stamping device and method for additive manufacturing, and the device comprises a movable workbench, a clamping and fixing assembly, a galvanometer type pulse laser transmitter, a multi-degree-of-freedom mechanical arm, an additive manufacturing nozzle, a clamping assembly and the like. The clamping assembly is used for clamping and transferring the metal film and spreading the metal film on the printing layer, and the clamping and fixing assembly is used for fixing the metal film on the printing layer. According to the device, a printing layer can be formed on the workbench and stamped, a dense honeycomb-shaped array type strengthening area is formed through selective stamping, a metal film can be laid on the printing layer and stamped, and therefore the in-situ strengthening and toughening effect of stamping array strengthening and metal film interlayer toughening is achieved; and the whole device is easy to operate and use, and has the characteristics of high precision, convenience in control of punching degree, full automation, high practicability, high punching efficiency and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and in particular to an array stamping and metal film stamping device for additive manufacturing and an in-situ toughening stamping method. Background Art

[0002] Additive manufacturing technology uses a gradual accumulation of materials to create physical parts. Through sophisticated computer-aided design, various materials can be stacked layer by layer to create physical products with specific shapes and functions. Compared to traditional subtractive manufacturing methods, such as cutting, additive manufacturing offers many advantages. It can shorten production time, improve processing efficiency and raw material utilization, and achieve complex structures to enhance product performance. Additive manufacturing technology is practical and has formed a technological system with relatively mature basic technologies and continuously innovative new technologies. It has gradually become a popular technology in aerospace, automotive, consumer electronics, medical and other fields.

[0003] Currently, the comprehensive mechanical properties of structural components processed using additive manufacturing technology still need to be improved. This is because additive manufacturing is a natural solidification process, and the resulting structural components have not undergone stable heat treatment or mechanical deformation processing such as rolling. As a result, additively manufactured structural components cannot achieve a balance between strength and toughness. This is especially true for softer metals (such as aluminum, copper, and low-carbon steel). Although their additively manufactured structural components have excellent toughness, they often have low strength. Therefore, effective methods are needed to achieve a simultaneous improvement in the strength and toughness of soft material additively manufactured structural components. Summary of the Invention

[0004] The purpose of the present invention is to address the problems existing in the prior art and provide an in-situ array metal film stamping device and stamping method for additive manufacturing.

[0005] To achieve the above object, the technical solution adopted by the present invention is: On the one hand, an in-situ array metal film stamping device for additive manufacturing is provided, comprising a movable workbench, a clamping and fixing assembly being provided on the workbench, a galvanometer-type pulse laser emitter being provided above the workbench, and the galvanometer-type pulse laser emitter being installed on an adjustable lifting bracket; multi-degree-of-freedom robotic arms that can move in multiple directions are provided on both sides of the workbench, wherein the execution end of one of the multi-degree-of-freedom robotic arms is connected to an additive manufacturing nozzle, and the additive manufacturing nozzle is used to form a printing layer on the workbench, and the execution end of the other multi-degree-of-freedom robotic arm is connected to a clamping assembly, and the clamping assembly is used to clamp the transferred metal film and spread the metal film on the printing layer, and the clamping and fixing assembly is used to fix the metal film on the printing layer.

[0006] The in-situ array metal film stamping device for additive manufacturing can form a printing layer on the workbench and perform stamping, and can also lay a metal film on the printing layer and perform stamping, and can perform selective stamping to form a dense honeycomb-shaped array reinforcement area, so as to realize in-situ reinforcement and toughening effects of stamping array reinforcement and metal film interlayer toughening, and the whole device is easy to operate and use, and has the characteristics of high precision, easy control of stamping degree, full automation, strong practicality and high stamping efficiency.

[0007] Further, a first mounting seat is arranged below the workbench, the first mounting seat is mounted on the moving module, and a pair of clamping and fixing assemblies are symmetrically arranged above the workbench.

[0008] Further, the clamping and fixing assembly comprises a movable base arranged on the workbench, and a liftable clamping arm is arranged on the movable base, and the clamping arm clamps and fixes the metal film on the printing layer.

[0009] Further, the lifting support comprises a first bottom plate, a second mounting seat is arranged below the first bottom plate, and the second mounting seat is mounted on the moving module; a pair of vertical guide rods are arranged on the first bottom plate, and a lifting block is arranged on each vertical guide rod; a cross beam is connected between the pair of lifting blocks, and the galvanometer pulse laser emitter is connected and mounted on the cross beam.

[0010] Further, the galvanometer pulse laser emitter comprises an emitter main body, a sliding clamping groove is arranged on one side of the emitter main body, the sliding clamping groove is connected to the lifting support, and a galvanometer lens is arranged below the emitter main body.

[0011] Further, the multi-degree-of-freedom mechanical arm comprises a connecting arm, a rotating joint is arranged on the connecting arm, a multi-degree-of-freedom joint is connected to the rotating joint, and the multi-degree-of-freedom joint is connected and mounted with the clamping assembly or the additive manufacturing nozzle at the end.

[0012] Further, a rotating base is arranged below the mechanical arm, the rotating base is arranged on a second bottom plate, a third mounting seat is arranged below the second bottom plate, and the third mounting seat is mounted on the moving module.

[0013] Further, the clamping assembly comprises a clamping head arranged at the end of the multi-degree-of-freedom mechanical arm, which is used to coordinate the action of laying the metal film on the surface of the printing layer, and the clamping head is controlled by a motor to tighten or loosen the metal film.

[0014] On the other hand, an in-situ array metal film stamping method for additive manufacturing is provided. The stamping method obtains a solidified single-layer printing layer by printing on the workbench, and punches a dense honeycomb array reinforcement area on the single-layer printing layer; a selective stamping is performed once for each printed layer, so that each printed layer forms a dense honeycomb array reinforcement area; after printing dozens of layers continuously, the metal film is spread on the surface of the top printed layer, and the surface of the printed layer covering the metal film is stamped; then the above-mentioned stamping method is repeated until the printing is completed.

[0015] Specifically, the stamping method includes the following steps: A solidified single-layer printing layer is obtained by printing on the workbench through the additive manufacturing nozzle, and the galvanometer-type pulse laser emitter is controlled to emit pulse laser to perform selective punching on the solidified single-layer printing layer to form a dense honeycomb array-type reinforcement area; During the process of selectively stamping the solidified single-layer printed layer, the galvanometer-type pulse laser emitter changes its angle to control the laser emission direction, thereby achieving selective pulse laser stamping; Each time a printing layer is printed, a selective stamping is performed on the printing layer, so that each printing layer forms a dense honeycomb array reinforcement area; The density, shape, and position of the array in the array-type reinforcement area are consistent with those of the previous printing layer; After stamping the selected areas layer by layer until dozens of layers are printed continuously, stamping is stopped and the multi-degree-of-freedom robotic arm is controlled to clamp the metal film and spread it on the surface of the printed layer; After the metal film is spread on the surface of the printed layer, the clamping and fixing assembly is controlled to attach the metal film to the printed layer; After the metal film is fixed by the clamping and fixing assembly, the galvanometer-type pulse laser emitter is controlled to emit pulse laser again to punch the surface of the printed layer covering the metal film, and the pulse laser emission direction is controlled to achieve full-coverage pulse laser film punching; Continue to repeat the above steps, printing layer by layer and punching the selected area. After printing dozens of layers, punch the metal film again until the printing is completed.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. The in-situ array metal film stamping device for additive manufacturing can form a printed layer on a workbench and perform stamping, and form a dense honeycomb array-type strengthening area by selective stamping. The metal film can also be laid on the printed layer and stamped to achieve the in-situ strengthening effect of stamping array strengthening and metal film interlayer toughening, and the entire device is easy to operate and use, with the characteristics of high precision, easy to control the stamping degree, full automation, strong practicality and high stamping efficiency; 2. The stamping method of the present invention introduces stamping technology into the additive manufacturing process, and forms a dense honeycomb array-type strengthening area by selective stamping layer by layer. The area is introduced due to the impact of the pulsed laser The compressive stress was reduced, and grain refinement was achieved, with a significant increase in strength; 3. The matrix area outside the array-type strengthening area was not affected by the pulsed laser and still maintained excellent toughness, which is equivalent to "inserting" a dense strengthening array parallel to the printing height direction into the matrix with excellent toughness, so that the overall structural component has excellent strength and toughness in the longitudinal direction; 4. After continuous printing and selective stamping of dozens of layers, a metal film clamping device is used to cover the surface of the printed layer with a metal film. Due to the excellent strength and toughness of the metal film interlayer and the lateral tensile external force parallel to the film surface, the metal film interlayer effectively compensates for the strength and toughness at the interface between the strengthening area and the matrix during the lateral stretching process, so that the structural component has excellent strength and toughness in both the lateral and longitudinal directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of the in-situ array metal film stamping device for additive manufacturing of the present invention; Figure 2 This is a schematic structural diagram of the clamping and fixing assembly on the workbench of the present invention; Figure 3 A schematic diagram of stamping an array of strengthening areas on a printed layer according to the present invention; Figure 4 Schematic diagram of stamping a metal film on a printed layer according to the present invention; Figure 5 This is a schematic diagram of the process of placing the metal film on dozens of printed layers and stamping them; In the figure: 1. Workbench; 2. Clamping and fixing assembly; 201. Mobile base; 202. Clamping arm; 3. Galvanometer pulse laser emitter; 4. Galvanometer lens; 5. Multi-degree-of-freedom robotic arm; 6. Additive manufacturing nozzle; 7. Clamping assembly; 8. First base plate; 9. Vertical guide rod; 10. Lifting slider; 11. Crossbeam; 12. Second base plate; 13. Rotating base; 14. First mounting seat; 15. Second mounting seat; 16. Third mounting seat; 17. Metal film; 18. Array-type strengthening area. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," etc., etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Example 1

[0020] like Figure 1 As shown, an in-situ array metal film stamping device for additive manufacturing includes a movable workbench 1, a clamping and fixing component 2 is provided on the workbench 1, a galvanometer-type pulse laser emitter 3 is provided above the workbench 1, and the galvanometer-type pulse laser emitter 3 is installed on an adjustable lifting bracket; multi-degree-of-freedom robotic arms 5 that can move in multiple directions are respectively provided on both sides of the workbench 1, one of the multi-degree-of-freedom robotic arms 5 is connected to an additive manufacturing nozzle 6 at its execution end, and the additive manufacturing nozzle 6 is used to form a printing layer on the workbench 1, and the other multi-degree-of-freedom robotic arm 5 is connected to a clamping component 7 at its execution end, and the clamping component 7 is used to clamp the transferred metal film and spread the metal film on the printing layer, and the clamping and fixing component 2 is used to fix the metal film on the printing layer.

[0021] This in-situ array metal film stamping device for additive manufacturing can form and stamp printed layers on a workbench, and form dense honeycomb array reinforcement areas through selective stamping. It can also lay metal films on the printed layers and stamp them to achieve in-situ strengthening effects of stamping array reinforcement and metal film interlayer toughening. Moreover, the entire device is easy to operate and use, and has the characteristics of high precision, easy to control the stamping degree, full automation, strong practicality and high stamping efficiency.

[0022] The flexibility and adaptability of the in-situ array metal film stamping device for additive manufacturing are also good. The workbench 1 can move in the horizontal direction to adjust its position. The galvanometer pulse laser emitter 3 is arranged on the lifting bracket to adjust its height position. A pair of multi-degree-of-freedom robotic arms 5 can move in a large range to facilitate loading, and can also perform micro-operations accurately above the workbench, and can all move according to system instructions; the additive manufacturing nozzle 6 prints the workpiece according to the instructions of the control system, and the setting of the multi-degree-of-freedom robotic arm can realize multi-directional additive manufacturing. The clamping assembly 7 clamps the in-situ metal film to be stamped and places it on the workpiece print layer printed by the additive manufacturing nozzle. The galvanometer pulse laser emitter 3 determines a suitable working position while moving, and performs in-situ pulsed laser stamping on the print layer or the metal film covering the print layer.

[0023] Further, combined Figure 2 As shown, a first mounting seat 14 is provided below the workbench 1 , and the first mounting seat 14 is installed on the moving module. A pair of the clamping and fixing components 2 are symmetrically arranged above the workbench 1 .

[0024] The moving module can drive the workbench to move, and the pair of clamping and fixing components can better clamp and fix the metal film laid on the printing layer from both sides.

[0025] Furthermore, the clamping and fixing assembly 2 includes a movable base 201 arranged on the workbench 1, and a liftable clamping arm 202 is provided on the movable base 201, and the clamping arm 202 clamps and fixes the metal film on the printed layer.

[0026] The movable base 201 can be a small electric slide, which can be raised and lowered by an electric push rod or a pneumatic telescopic rod to drive the clamping arm to rise and fall, so that the clamping arm 202 can be extended and retracted up and down and can move forward and backward to clamp and fix the spread metal film on the surface of the printing layer.

[0027] Furthermore, the lifting bracket includes a first base plate 8, a second mounting seat 15 is provided below the first base plate 8, and the second mounting seat 15 is installed on the mobile module; a pair of vertical guide rods 9 are provided on the first base plate 8, and lifting sliders 10 are respectively provided on the vertical guide rods 9, and a crossbeam 11 is connected between the pair of lifting sliders 10, and the crossbeam 11 is connected to install the galvanometer-type pulse laser emitter 3.

[0028] The lifting slider 10 can drive the crossbeam 11 to move up and down along a pair of vertical guide rods 9, thereby adjusting the height of the galvanometer-type pulse laser emitter 3 for laser stamping. The lifting slider 10 can be electrically driven so as to be connected to a controller for control.

[0029] Further, the galvanometer pulse laser emitter 3 comprises an emitter body, one side of the emitter body is provided with a sliding clamping groove connected to the lifting support, and the lower side of the emitter body is provided with a galvanometer lens 4.

[0030] In some embodiments, the cross beam 11 is a transverse guide rail, on which an electric sliding block is arranged, and the emitter body is mounted on the electric sliding block, so that the emitter body can be controlled to move along the cross beam, thereby enabling laser stamping at different positions. In operation, the laser emitting device is located directly above the to-be-stamped printing layer and faces the to-be-stamped area.

[0031] The galvanometer lens 4 can control the single-direction laser beam to be emitted in the required direction through variable-angle setting, and perform laser stamping on the printing layer and different positions on the surface of the printing layer. In operation, the galvanometer lens first receives a control signal from the control circuit, and then the galvanometer motor is deflected to change the direction of the internal laser beam. The internal sensors of the galvanometer lens of the present application are all photoelectric sensors, which can greatly improve the precision and accuracy of the galvanometer.

[0032] Further, the multi-degree-of-freedom mechanical arm 5 can be a multi-axis mechanical arm (such as a six-axis mechanical arm), or can be composed of multiple sections of electric or hydraulic telescopic arms connected by power joints. The specific joint type is not limited, and it is only required to be capable of realizing folding and selection and the like. For example, the multi-degree-of-freedom mechanical arm comprises a connecting arm, the connecting arm is provided with a rotary joint, the rotary joint is connected with a multi-degree-of-freedom joint, and the distal end of the multi-degree-of-freedom joint is connected with the clamping assembly or the additive manufacturing nozzle.

[0033] Further, the mechanical arm is provided below with a rotating base 13, the rotating base 13 is arranged on the second bottom plate 12, the second bottom plate 12 is provided below with a third mounting seat 16, and the third mounting seat 16 is mounted on the moving module. The rotating base 13 can drive the multi-degree-of-freedom mechanical arm 5 to rotate, and the moving module can slide in the front-back direction as a whole.

[0034] The structures of the mounting seats below the first bottom plate 8 and the second bottom plate 12 are basically similar, and can be used to connect and mount the moving modules. These moving modules can be multiple moving modules arranged at multiple positions, or can be arranged on the same large moving module. Similarly, the first bottom plate 8 and the second bottom plate 12 on both sides can be three independent supporting bottom plates with different sizes, or can be a large bottom plate connected together.

[0035] Furthermore, the clamping assembly 7 includes a clamping head mounted at the end of the multi-DOF robotic arm 5, which coordinates the spreading of the metal film across the printed surface. The clamping head is controlled by a motor to tighten or loosen the metal film. The clamping head can be a clamp-type clamping actuator, mounted on the last section of the multi-DOF robotic arm via a motor-driven mechanism. The motor-driven mechanism can be of any type, such as a DC motor or an electromagnetic motor. The motor-driven mechanism significantly enhances the flexibility of the clamp-type clamping mechanism.

[0036] The additive manufacturing nozzle 6 can be mounted on the end effector of the multi-degree-of-freedom robotic arm 5 via a motor rotation device. Under the control of the motor rotation device, it can rotate 360 ​​degrees and move as a whole. Through the above rotation and translation, the optimal additive manufacturing working position is determined. The specific control method can be based on common knowledge. For example, a robot coordinate system can be established and the working position can be converted into coordinates in the robot coordinate system for calculation. The additive manufacturing nozzle delivers additive manufacturing powder and raw materials through a powder feeding pipe to print the workpiece.

[0037] It should be noted that the present invention is also provided with a control system, which can be installed on the back of the integral structural support and can also be remotely controlled. The control system can be an integrated dedicated control system. Of course, the additive manufacturing controller and the mechanical controller can also be set separately, and the specific form is not limited. Example 2

[0038] This embodiment provides a stamping method using the in-situ array metal film stamping device for additive manufacturing in Example 1. The stamping method obtains a solidified single-layer print layer by printing on the workbench, and punches a dense honeycomb array-type reinforcement area on the single-layer print layer; a selective stamping is performed once for each printed layer, so that each printed layer forms a dense honeycomb array-type reinforcement area; after printing dozens of layers continuously, the metal film is spread on the surface of the top printed layer, and the surface of the printed layer covering the metal film is stamped; then the above-mentioned stamping method is repeated until printing is completed.

[0039] The stamping method of the present invention introduces stamping technology into the additive manufacturing process, and forms a dense honeycomb array-type reinforcement area through layer-by-layer selective stamping. Due to the impact of the pulsed laser, this area introduces compressive stress, achieves grain refinement, and significantly improves strength. At the same time, the matrix area outside the array-type reinforcement area is not affected by the pulsed laser and still maintains excellent toughness. This is equivalent to "inserting" a dense reinforcement array parallel to the printing height direction into the matrix with excellent toughness, so that the entire structural component has excellent strength and toughness in the longitudinal direction (printing height direction). In addition, due to the sudden changes in microstructure and stress at the interface between the reinforcement area and the matrix, the strength and toughness are relatively weak, so it is easy to cause interface cracking when subjected to a transverse (perpendicular to the printing height direction) tensile external force. To address this issue, after continuous printing and selective stamping of dozens of layers, the clamping assembly is used to cover the surface of the printed layer with a metal film. The metal film adheres tightly to the surface of the printed layer to ensure that the metal film will not be affected by the thermal stress generated by laser stamping and move. The laser emitter emits a pulsed laser to achieve stamping, compacting the film on the surface of the printed layer. The printing and selective stamping process is then repeated. After printing and selective stamping of dozens of layers, the metal film is stamped again. This process is repeated until printing is completed to obtain a structural component with a metal film interlayer. Because the metal film interlayer has excellent strength and toughness, and the lateral tensile external force is parallel to the film surface, the metal film interlayer effectively compensates for the strength and toughness at the interface between the reinforcement area and the substrate during the lateral stretching process, giving the structural component excellent strength and toughness in both the lateral and longitudinal directions.

[0040] During the 3D printing additive manufacturing process, each time a layer of powder is printed, a laser is used to impact it to create a honeycomb-like reinforcement area. This process is then continued, and after dozens of layers, a layer of metal film is added to it, which is then stamped onto the printed layer. This process is then repeated again, with the printing impact and then the film impact, until the end. In this way, a composite structural part can be obtained that has both the honeycomb-like reinforcement area with the selective impact and the metal film interlayer. In other words, by applying external forces in the horizontal and vertical directions of additive manufacturing, excellent strength and toughness can be achieved; the layer-by-layer stacking allows the honeycomb-like reinforcement areas of the selective reinforcement area to also play a role, and the metal film also plays a role.

[0041] Specific, combined Figures 3 to 5 As shown, the stamping method includes the following steps: Step 1: Printing a solidified single-layer print layer on the workbench 1 through the additive manufacturing nozzle, controlling the galvanometer-type pulse laser emitter 3 to emit pulsed laser to perform selective punching on the solidified single-layer print layer to form a dense honeycomb array-type reinforcement area 18; Step 101: During the process of selectively stamping the solidified single-layer printed layer, the galvanometer-type pulse laser emitter changes its angle to control the laser emission direction, thereby achieving selective pulse laser stamping; Step 2: Each time a printing layer is printed, a selective stamping is performed on the printing layer so that each printing layer forms a dense honeycomb array reinforcement area 18; Step 201: A dense honeycomb array reinforcement area 18 is formed by selectively stamping layer by layer, wherein the density, shape, and position of the array are consistent with the previous printing layer; Step 202: Stamping is performed layer by layer until dozens of layers are printed continuously, then stamping is stopped and the multi-degree-of-freedom robot arm 5 is controlled to clamp the metal film 17 and spread the metal film 17 on the surface of the printed layer; Step 3: After the metal film 17 is spread on the surface of the multi-layer printed and stamped printing layer, the clamping and fixing assembly is controlled to attach the metal film 17 to the printing layer; Step 4: After the metal film 17 is fixed by the clamping and fixing assembly, the galvanometer-type pulse laser emitter 3 is controlled again to emit pulse laser; Step 5: Punching the surface of the printed layer covering the metal film 17, controlling the pulse laser emission direction, and achieving full coverage pulse laser film punching; Step 6: After achieving a full coverage pulse laser film stamping, continue to repeat the above steps 1-5, that is, print the printing layer layer by layer again and perform layer-by-layer selective stamping. After printing dozens of layers, stamp the metal film, and repeat this cycle until the printing is completed.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An in-situ array metal film stamping device for additive manufacturing, characterized in that: It includes a movable workbench, on which a clamping and fixing component is provided, a galvanometer-type pulse laser emitter is provided above the workbench, and the galvanometer-type pulse laser emitter is installed on an adjustable lifting bracket; multi-degree-of-freedom robotic arms that can move in multiple directions are respectively provided on both sides of the workbench, wherein the execution end of one of the multi-degree-of-freedom robotic arms is connected to an additive manufacturing nozzle, and the additive manufacturing nozzle is used to form a printing layer on the workbench, and the execution end of the other multi-degree-of-freedom robotic arm is connected to a clamping component, and the clamping component is used to clamp and transfer a metal film and spread the metal film on the printing layer, and the clamping and fixing component is used to fix the metal film on the printing layer.

2. The in-situ array metal film stamping device for additive manufacturing according to claim 1, characterized in that: A first mounting seat is provided below the workbench, and the first mounting seat is installed on the moving module. A pair of the clamping and fixing components are symmetrically arranged above the workbench.

3. The in-situ array metal film stamping device for additive manufacturing according to claim 1, characterized in that: The clamping and fixing assembly includes a movable base arranged on the workbench, and a liftable clamping arm is provided on the movable base, and the clamping arm clamps and fixes the metal film on the printed layer.

4. The in-situ array metal film stamping device for additive manufacturing according to claim 1, characterized in that: The lifting bracket includes a first base plate, a second mounting seat is provided under the first base plate, and the second mounting seat is installed on the movable module; a pair of vertical guide rods are provided on the first base plate, and lifting sliders are respectively provided on the vertical guide rods, and a crossbeam is connected between the pair of lifting sliders, and the crossbeam is connected to install the galvanometer-type pulse laser emitter.

5. The in-situ array metal film stamping device for additive manufacturing according to claim 1, characterized in that: The galvanometer-type pulse laser emitter includes an emitter body. A sliding slot is provided on one side of the emitter body. The sliding slot is connected to the lifting bracket. A galvanometer lens is provided below the emitter body.

6. The in-situ array metal film stamping device for additive manufacturing according to claim 1, characterized in that: The multi-degree-of-freedom robotic arm includes a connecting arm, a rotating joint is provided on the connecting arm, the rotating joint is connected to a multi-degree-of-freedom joint, and the end of the multi-degree-of-freedom joint is connected to and installed with the clamping assembly or the additive manufacturing nozzle.

7. The in-situ array metal film stamping device for additive manufacturing according to claim 6, characterized in that: A rotating base is provided below the robotic arm, and the rotating base is arranged on the second bottom plate. A third mounting base is provided below the second bottom plate, and the third mounting base is installed on the mobile module.

8. The in-situ array metal film stamping device for additive manufacturing according to claim 1, characterized in that: The clamping assembly includes a clamping head arranged at the end of the multi-degree-of-freedom robotic arm, which is used to coordinate the movement of the metal film being spread on the surface of the printed layer. The clamping head is controlled by a motor to tighten or loosen the metal film.

9. The stamping method of the in-situ array metal film stamping device for additive manufacturing according to any one of claims 2 to 8, characterized in that: The punching method is to obtain a solidified single-layer printed layer by printing on the workbench, and then punching a dense honeycomb array-type reinforcement area on the single-layer printed layer; a selective punching is performed once for each printed layer, so that each printed layer forms a dense honeycomb array-type reinforcement area; After printing dozens of layers continuously, a metal film is spread on the surface of the top printed layer, and the surface of the printed layer covered with the metal film is punched; then the above punching method is repeated until the printing is completed.

10. The stamping method of the in-situ array metal film stamping device for additive manufacturing according to claim 9, characterized in that: The stamping method comprises the following steps: The additive manufacturing nozzle is used to print a solidified single-layer printing layer on the workbench, and the galvanometer-type pulse laser emitter is controlled to emit pulsed laser to perform selective punching on the solidified single-layer printing layer to form a dense honeycomb array-type reinforcement area; During the process of selectively stamping the solidified single-layer printed layer, the galvanometer-type pulse laser emitter changes its angle to control the laser emission direction, thereby achieving selective pulse laser stamping; Each time a printing layer is printed, a selective stamping is performed on the printing layer, so that each printing layer forms a dense honeycomb array reinforcement area; The density, shape, and position of the array in the array-type reinforcement area are consistent with those of the previous printing layer; After stamping the selected areas layer by layer until dozens of layers are printed continuously, stamping is stopped and the multi-degree-of-freedom robotic arm is controlled to clamp the metal film and spread it on the surface of the printed layer; After the metal film is spread on the surface of the printed layer, the clamping and fixing assembly is controlled to attach the metal film to the printed layer; After the metal film is fixed by the clamping and fixing assembly, the galvanometer-type pulse laser emitter is controlled to emit pulse laser again to punch the surface of the printed layer covering the metal film, and the pulse laser emission direction is controlled to achieve full-coverage pulse laser film punching; Continue to repeat the above steps, printing layer by layer and punching the selected area. After printing dozens of layers, punch the metal film again until the printing is completed.

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