A continuous fiber composite material additive device and method based on laser melting friction stir technology

Abstract

The application provides a continuous fiber composite material additive device and method based on laser melting friction stir technology. The device comprises a friction stir additive mechanism, a resin introduction mechanism, a continuous fiber laying mechanism and a laser heating mechanism arranged side by side and linearly. The method steps comprise: friction stir additive forming according to a preset additive path; in the process, a pressure sensor feeds back and controls the pressure in a preset range in real time, and the pressure sensor 1 and the pressure sensor 2 feed back the pressure value in real time and control the pressure in the preset range; and a matching mechanism of the pressure and the rotating speed is set. In the application, the continuous fiber raw yarn and the resin material can be effectively used to realize the additive forming of complex composite material components without using continuous fiber prepreg, the cost of the continuous fiber composite material additive forming is greatly reduced, the process flow is shortened, the fiber material is not damaged, the forming process is stable and reliable, and the material composition can be easily and timely adjusted.

Description

Technical Field

[0001] This invention belongs to the field of continuous fiber reinforced thermoplastic composite material forming technology, specifically relating to a continuous fiber composite material additive manufacturing device and method based on laser melting and stirring friction technology. Background Technology

[0002] Continuous fiber reinforced thermoplastic composites consist of continuous fiber bundles as reinforcement and high-performance thermoplastic resins as the matrix, exhibiting excellent lightweight and high-strength properties. Taking continuous carbon fiber reinforced polyetheretherketone (PEEK) composites as an example, their density is 70%-80% of that of aluminum alloys and 20%-30% of that of steel, but their tensile strength can reach over 1000 MPa, comparable to and far exceeding that of aluminum alloys. This makes them one of the preferred materials for weight reduction in key components for aerospace, advanced weaponry, and marine vessels, and they are gradually developing into a key material to replace traditional metal and high-performance resin materials in critical core fields. With the expansion of the fiber-reinforced resin composite industry and the upgrading of high-performance equipment functions, the industry has placed more stringent demands on the complexity, efficiency, and stability of continuous fiber reinforced thermoplastic composite component forming. Currently, forming molds for thermoplastic composites using methods such as compression molding, injection molding, and autoclaves are expensive, have long processes, and are difficult to control in terms of key process parameters, making it difficult to meet the forming needs of advanced and complex components. The industry urgently needs technological approaches that offer more flexible forming methods, more efficient processes, and more stable and reliable component stability.

[0003] In the prior art: Document CN115972572A discloses a robot-assisted laser additive manufacturing system for interlayer reinforcement of continuous fiber composites. The system uses a robotic arm connected to a printing unit, a laser beam to heat composite filaments, and pressure rollers to flatten the material into strips, which are then bonded and stacked layer by layer to form a high-density part. Document CN116118186A discloses a composite material additive manufacturing equipment, which consists of a controller, a robotic arm, a mounting bracket, a filament feeding device, a laser device, and an impregnation device to achieve uniform impregnation of the fiber filaments. Document CN115384055A discloses a fiber-reinforced composite material additive manufacturing actuator with real-time external temperature and pressure control. This actuator improves the interlayer bonding strength of the component by using external auxiliary laser heating and roller extrusion, and providing real-time feedback control.

[0004] However, as mentioned above, all of these methods require the use of continuous fiber prepregs to achieve additive manufacturing. Prepreg preparation is costly, involves lengthy processes, and makes it difficult to control the material composition in real time. More importantly, the challenges encountered during additive manufacturing include the difficulty in applying uniform force to the deposited layer material and the inability to precisely, uniformly, and flexibly control the pressure in the additive region. Summary of the Invention

[0005] At least in order to solve the technical problems mentioned in the background art, the present invention aims to provide a continuous fiber composite material additive device and method based on laser melting and stirring friction technology.

[0006] The present invention adopts the following technical solution.

[0007] A continuous fiber composite material additive manufacturing device based on laser melting friction stir technology includes a friction stir additive manufacturing mechanism, a resin introduction mechanism, a continuous fiber laying mechanism, and a laser heating mechanism arranged in parallel and linearly. The laser heating mechanism is used to preheat the area to be added to a target temperature. The continuous fiber laying mechanism is used to lay continuous fiber bundles in the preheated area to be added. The resin introduction mechanism is used to inject molten resin at the newly laid continuous fiber bundles. The friction stir additive manufacturing mechanism is used to perform friction stir additive manufacturing with the molten resin in the area to be added and the continuous fiber bundles.

[0008] In order to achieve additive manufacturing more smoothly, the fiber nozzle of the continuous fiber layup mechanism is close to the resin nozzle of the resin introduction mechanism, or the fiber nozzle of the continuous fiber layup mechanism is located directly below the resin nozzle of the resin introduction mechanism.

[0009] To achieve more stable additive manufacturing, the friction stir additive manufacturing mechanism, resin introduction mechanism, continuous fiber laying mechanism, and laser heating mechanism are located on the same frame, which is installed at the working end of the robot.

[0010] Furthermore, the friction stir additive manufacturing mechanism includes a friction stir motor mounted on a motor bracket, a positioning bracket provided on the side of the motor bracket, and the output end of the friction stir motor connected to a friction stir tool head assembly via a transmission mechanism. The friction stir tool head assembly includes a transmission shaft that vertically penetrates the base plate of the frame, the lower end of the transmission shaft is connected to the friction stir spindle, and the upper end of the transmission shaft is mounted on the positioning bracket via a first bearing. A pressure sensor for monitoring the axial pressure of the friction stir additive manufacturing process is installed on the upper end of the first bearing.

[0011] Furthermore, the resin introduction mechanism includes a feeding motor mounted on a motor bracket. The output end of the feeding motor is connected to the feeding assembly via a transmission mechanism two. The upper end of the feeding assembly is mounted on a positioning bracket via a second bearing. A pressure sensor two for monitoring axial pressure is installed on the upper end of the second bearing. The feeding assembly includes a conical helical gear located inside the resin feeding hopper. The conical helical gear is fitted onto a gear drive shaft, which is connected to the transmission mechanism two. A resin inlet hopper is provided above the resin feeding hopper, and the resin inlet hopper communicates with the resin feeding hopper. A heating element is provided in the lower section of the resin feeding hopper.

[0012] Furthermore, the continuous fiber laying mechanism includes a fiber hopper, a fiber feeding mechanism, and a fiber conveying channel. The fiber feeding mechanism delivers the continuous fiber bundle in the fiber hopper to the fiber conveying channel and lays it obliquely from the lower end of the fiber conveying channel. The laser heating mechanism includes a laser generator installed on the base plate of the frame. The laser emitted by the laser generator is obliquely emitted to the area to be added material after passing through the optical path guide.

[0013] To achieve more precise additive manufacturing, the fiber delivery channel has an arc-shaped structure, with the outer arc surface of the arc facing the optical path guide. The center lines of the optical path guide, the fiber delivery channel, the resin nozzle, and the stirring friction spindle are located in the same vertical plane.

[0014] Furthermore, a curved groove is provided at the bottom end of the stirring friction spindle, and the outer end of the curved groove extends to the edge of the bottom end of the stirring friction spindle.

[0015] A continuous fiber composite material additive manufacturing method using the aforementioned apparatus includes the following steps: Step 1: Place the continuous fiber filament roll into the fiber hopper, then pass the fiber bundle through the fiber feeding mechanism and fiber conveying channel in sequence until the front end of the fiber bundle is placed below the resin nozzle; then put the resin raw material into the resin feed hopper. Step 2: Start the robot and adjust its posture so that the lower end of the stirring friction spindle is 2-5mm above the additive substrate. Start the heating element in the resin feeding hopper, set the heating power, and start the feeding motor after preheating for 1-5 minutes. Set the feeding motor speed until molten resin appears below the resin nozzle. Step 3: Start the laser heating mechanism to preheat the area to be added to the target temperature, then start the fiber feeding mechanism and set the feeding rate until the continuous fiber bundle is stably conveyed to the molten resin; then start the friction stirring additive manufacturing mechanism and set the friction stirring motor speed. Step 4: Perform friction stir additive manufacturing according to the preset additive path. During this process, the pressure sensor provides real-time feedback and controls the pressure within the preset range. Pressure sensor 1 and pressure sensor 2 provide real-time pressure values ​​and control the pressure within the preset range. Simultaneously, a pressure and speed matching mechanism is set: for every 2-5 N increase in pressure value from pressure sensor 1, the feed motor speed decreases by 5-10 rap; conversely, for every 2-5 N decrease in pressure value from pressure sensor 1, the feed motor speed increases by 5-10 rap. For every 10-20 N increase in pressure value from pressure sensor 2, the feed motor speed decreases by 50-100 rap; conversely, for every 10-20 N decrease in pressure value from pressure sensor 2, the feed motor speed increases by 50-100 rap. In this process, in addition to uniformly and stably controlling the forming pressure in the additive manufacturing area, the friction stir spindle also discharges excess resin and fiber debris through curved grooves via high-speed rotation, achieving a smooth and flat surface for the additively formed composite material component. Step 5: After the additive forming is completed, shut down the device and clean up any remaining material in the curved groove 202.

[0016] In this invention, the direction of travel of the device during the additive manufacturing process is the direction in which the friction stir additive mechanism extends to the laser heating mechanism.

[0017] Beneficial Effects: This invention creatively proposes a scheme combining friction stir additive manufacturing, resin introduction, continuous fiber layup, and laser heating. Without using continuous fiber prepreg, it effectively utilizes continuous fiber precursors and resin materials to achieve additive manufacturing of complex composite components, significantly reducing the cost of continuous fiber composite additive manufacturing, shortening the process flow, and preventing damage to the fiber material. The forming process is stable and reliable, and it facilitates real-time control of material composition. Using this invention, the forming pressure in the additive manufacturing process is cleverly controlled by surface-region regulation (significantly different from the linear pressure control in existing schemes), enabling precise, uniform, and flexible control of the pressure in the additive region. This allows for differentiated control of different deposited layer materials, resulting in superior interlayer bonding in the formed composite material and stable structural performance. Furthermore, this invention does not damage the fiber material, and the formed component has virtually no weak areas, effectively avoiding structural performance imbalances. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a continuous fiber composite material additive manufacturing device based on laser melting and stirring friction technology in the embodiment; Figure 2 This is a schematic diagram of the disassembled state of the device in the embodiment (excluding the robot structure); Figure 3This is a schematic diagram of the stirring friction additive manufacturing mechanism, resin introduction mechanism, continuous fiber laying mechanism, and laser heating mechanism of the device in the embodiment. Figure 4 This is a schematic diagram of the stirring friction spindle structure of the device in the embodiment; Figure 5 This is a schematic diagram of the resin introduction mechanism of the device in the embodiment; Figure 6 This is a schematic diagram of the continuous fiber laying mechanism of the device in the embodiment; Figure 7 This is a schematic diagram of the device in use in the embodiment. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Combination Figures 1 to 7 As shown, a continuous fiber composite material additive manufacturing device based on laser melting friction stir technology includes a friction stir additive manufacturing mechanism, a resin introduction mechanism, a continuous fiber laying mechanism, and a laser heating mechanism arranged side-by-side in a linear fashion. The laser heating mechanism is used to preheat the area to be additively manufactured to a target temperature. The continuous fiber laying mechanism is used to lay continuous fiber bundles in the preheated area to be additively manufactured. The resin introduction mechanism is used to inject molten resin into the newly laid continuous fiber bundles. The friction stir additive manufacturing mechanism is used to perform friction stir additive manufacturing with the molten resin in the area to be additively manufactured and the continuous fiber bundles. The fiber nozzle of the continuous fiber laying mechanism is close to the resin nozzle 304 of the resin introduction mechanism. The friction stir additive manufacturing mechanism, resin introduction mechanism, continuous fiber laying mechanism, and laser heating mechanism are located on the same frame 002, which is mounted on the working end of a robot 001. The frame 002 adopts the following design: Figure 2 The frame shown has 101 cutouts on its four sides.

[0021] In this embodiment, the friction stir additive manufacturing mechanism includes a friction stir motor 103 mounted on a motor bracket 104. A positioning bracket 105 is provided on the side of the motor bracket 104. The output end of the friction stir motor 103 is connected to the friction stir tool head assembly through a transmission mechanism 108. The friction stir tool head assembly includes a transmission shaft that vertically penetrates the base plate 109 of the frame. A transmission gear 201 is provided on the upper part of the transmission shaft. The transmission gear 201 cooperates with the transmission mechanism 108. The lower end of the transmission shaft is connected to the friction stir spindle 110. The upper end of the transmission shaft is mounted on the positioning bracket 105 through a first bearing 107. A pressure sensor 106 for monitoring the axial pressure of the friction stir additive manufacturing is installed on the upper end of the first bearing 107.

[0022] In this embodiment, combined with Figure 5 As shown, the resin introduction mechanism includes a feeding motor 102 mounted on a motor bracket 104. The output end of the feeding motor 102 is connected to a feeding assembly via a transmission mechanism 111. The upper end of the feeding assembly is mounted on a positioning bracket 105 via a second bearing 118. A pressure sensor 119 for monitoring axial pressure is mounted on the upper end of the second bearing 118. The feeding assembly includes a conical helical gear 302 located in the resin feeding hopper 113. The conical helical gear 302 is fitted on a gear drive shaft 112. A belt drive gear 301 on the gear drive shaft 112 is fitted to the transmission mechanism 111. A resin feed hopper 114 is provided above the resin feeding hopper 113 and communicates with the resin feeding hopper 113. A heating element 303 is provided in the lower section of the resin feeding hopper 113.

[0023] In this embodiment, the continuous fiber laying mechanism includes a fiber hopper 121, a fiber feeding mechanism 120, and a fiber conveying channel 115. The fiber feeding mechanism 120 feeds the continuous fiber bundle 401 in the fiber hopper 121 to the fiber conveying channel 115, and leads it out obliquely from the lower end of the fiber conveying channel 115 and lays it. The laser heating mechanism includes a laser generator 117 installed on the base plate 109 of the frame. The laser emitted by the laser generator 117 is emitted obliquely to the area to be added material after passing through the optical path guide 116.

[0024] In this embodiment, the fiber conveying channel 115 has an arc-shaped structure, with the outer arc surface facing the optical path guide 116. The centerline of the optical path guide 116, the centerline of the fiber conveying channel 115, the centerline of the resin nozzle 304, and the centerline of the stirring friction main shaft 110 are located in the same vertical plane. A curved groove 202 is provided at the bottom end of the stirring friction main shaft 110, and the outer end of the curved groove 202 extends to the edge of the bottom end of the stirring friction main shaft 110.

[0025] A continuous fiber composite material additive manufacturing method using the device described in this embodiment includes the following steps: Step 1: Place the continuous fiber filament roll into the fiber hopper 121, and then pass the fiber bundle through the fiber feeding mechanism 120 and the fiber conveying channel 115 in sequence until the front end of the fiber bundle is placed below the resin nozzle 304; then put the resin raw material 402 into the resin feed hopper 114. Step 2: Start the robot and adjust its posture so that the lower end of the stirring friction spindle 110 is 2-5mm above the additive substrate. Start the heating element in the resin feeding bin 113, set the heating power, and start the feeding motor 102 after preheating for 1-5 minutes. Set the speed of the feeding motor 102 until molten resin appears below the resin nozzle 304. Step 3: Start the laser heating mechanism and use the laser 502 to preheat the area to be added to the target temperature. Then start the fiber feeding mechanism 120 and set the feeding rate until the continuous fiber bundle is stably conveyed to the molten resin. Then start the friction stirring additive manufacturing mechanism and set the speed of the friction stirring motor 103. Step 4: Perform friction stir additive manufacturing according to the preset additive path. During this process, pressure sensor 106 and pressure sensor 119 provide real-time feedback and control the pressure within the preset range. Simultaneously, a pressure and speed matching mechanism is set: for every 2-5 N increase in pressure value from pressure sensor 106, the speed of feed motor 102 decreases by 5-10 rap; conversely, for every 2-5 N decrease in pressure value from pressure sensor 106, the speed of feed motor 102 increases by 5-10 rap. For every 10-20 N increase in pressure value from pressure sensor 119, the speed of feed motor 102 decreases by 50-100 rap; conversely, for every 10-20 N decrease in pressure value from pressure sensor 119, the speed of feed motor 102 increases by 50-100 rap. In this process, in addition to uniformly and stably controlling the forming pressure in the additive manufacturing area, the friction stir spindle 110, through high-speed rotation, discharges excess resin and fiber debris through the curved groove 202, achieving a smooth and flat surface for the additively formed composite material component. Step 5: After additive manufacturing is completed, shut down the device and clean the residual material from the curved groove 202. The direction of travel of the device during the additive manufacturing process is the direction from the friction stir additive manufacturing mechanism to the laser heating mechanism (i.e., Figure 7 (In the direction indicated by the middle arrow 501).

[0026] The state of frictional additive manufacturing under a preset additive path is as follows: Figure 7 As shown, the area to be added on the additive substrate 504 is preheated to the target temperature using a laser 502, forming a resin molten base layer with stronger adhesion, such as... Figure 7As shown in part number 503. A continuous fiber bundle 401 is laid on the heated area to be additively processed using a continuous fiber laying mechanism. Molten resin is introduced onto the continuous fiber bundle 401 in the area to be additively processed using a resin introducing mechanism. A stirring friction additive processing mechanism is then used to stir and frictionally add the molten resin and continuous fiber bundle in the area to be additively processed. After stirring and friction additive processing, the fibers in the composite material layer are rearranged, achieving a planar spiral and uniform interlacing arrangement of fibers from the initial linear arrangement on the resin substrate. This increases the rigidity and load-bearing uniformity of the additively formed composite material component. During this process, the composite material layer spun by the stirring friction spindle 110 is as follows... Figure 7 As shown in number 505.

[0027] This approach effectively utilizes continuous fiber precursors and resin materials to achieve additive manufacturing of complex composite components without the use of continuous fiber prepregs. This significantly reduces the cost of additive manufacturing of continuous fiber composites (by at least 30% compared to using continuous fiber prepregs), shortens the process flow, avoids damage to the fiber material, and ensures a stable and reliable forming process. It also facilitates real-time control of material composition, enabling the composite additive manufacturing of various and dissimilar fibers such as continuous carbon fiber, glass fiber, and Kevlar fiber. Furthermore, this approach cleverly utilizes surface-region control of the forming pressure in the additive manufacturing area (fundamentally different from the linear pressure control in existing methods). This allows for precise, uniform, and flexible control of the pressure in the additive manufacturing area, enabling differentiated control of different deposition layer materials. It also allows for stable and uniform control of the single-layer thickness of the composite material within the range of 0.1~1mm, tailored to the hardness of different matrix materials. Simultaneously, the planar helical interwoven fiber composite material layer formed through stirring, rotation, and compaction exhibits superior interlayer bonding, better planar isotropy, excellent stiffness, and stable structural performance. Furthermore, this approach does not damage the fiber material, and the formed component has virtually no weak areas, effectively preventing structural performance imbalances.

Claims

1. A continuous fiber composite material additive manufacturing method, employing a continuous fiber composite material additive manufacturing device based on laser melting and stirring friction technology, characterized in that: The continuous fiber composite material additive manufacturing device includes a friction stir additive manufacturing mechanism, a resin introduction mechanism, a continuous fiber laying mechanism, and a laser heating mechanism arranged in parallel and linearly. The laser heating mechanism is used to preheat the area to be added to a target temperature. The continuous fiber laying mechanism is used to lay continuous fiber bundles in the preheated area to be added. The resin introduction mechanism is used to inject molten resin into the newly laid continuous fiber bundles. The friction stir additive manufacturing mechanism is used to perform friction stir additive manufacturing with the molten resin in the area to be added and the continuous fiber bundles. The friction stir additive manufacturing mechanism includes a friction stir motor (103) mounted on a motor bracket (104). A positioning bracket (105) is provided on the side of the motor bracket (104). The output end of the friction stir motor (103) is connected to the motor bracket (104) via... The transmission mechanism (108) is connected to the friction stir tool head assembly; the friction stir tool head assembly includes a transmission shaft that runs vertically through the frame base plate (109), the lower end of the transmission shaft is connected to the friction stir spindle (110), and the upper end of the transmission shaft is mounted on the positioning bracket (105) through the first bearing (107). The upper end of the first bearing (107) is equipped with a pressure sensor (106) for monitoring the axial pressure of friction stir additive manufacturing; after the friction stir additive manufacturing is completed, the composite material layer fibers are rearranged to achieve a uniform spiral interweaving arrangement of fibers from the initial linear arrangement in the resin base layer to a planar arrangement; a curved groove (202) is provided at the bottom end of the friction stir spindle (110), and the outer end of the curved groove (202) extends to the edge of the bottom end of the friction stir spindle (110); The resin introduction mechanism includes a feeding motor (102) mounted on a motor bracket (104). The output end of the feeding motor (102) is connected to the feeding assembly through a transmission mechanism (111). The upper end of the feeding assembly is mounted on a positioning bracket (105) through a second bearing (118). A pressure sensor (119) for monitoring axial pressure is installed on the upper end of the second bearing (118). The feeding assembly includes a conical helical gear (302) located in the resin feeding bin (113). The conical helical gear (302) is fitted on a gear transmission shaft (112). The gear transmission shaft (112) is fitted to the transmission mechanism (111). A resin feed bin (114) is provided above the resin feeding bin (113). The resin feed bin (114) communicates with the resin feeding bin (113). A heating element (303) is provided in the lower section of the resin feeding bin (113). The continuous fiber laying mechanism includes a fiber hopper (121), a fiber feeding mechanism (120), and a fiber conveying channel (115). The fiber feeding mechanism (120) feeds the continuous fiber bundle in the fiber hopper (121) to the fiber conveying channel (115), and leads it out obliquely from the lower end of the fiber conveying channel (115) and lays it. The laser heating mechanism includes a laser generator (117) installed on the base plate (109) of the frame. The laser emitted by the laser generator (117) is emitted obliquely to the area to be added after passing through the optical path guide (116). The method steps include: Step 1: Place the continuous fiber filament roll into the fiber hopper (121), and then pass the fiber bundle through the fiber feeding mechanism (120) and the fiber conveying channel (115) in sequence until the front end of the fiber bundle is placed below the resin nozzle (304); then put the resin raw material into the resin feed hopper (114). Step 2: Start the robot and adjust the robot posture so that the lower end of the stirring friction spindle (110) is 2-5mm above the additive substrate. Start the heating element in the resin feeding bin (113), set the heating power, and start the feeding motor (102) after preheating for 1-5 minutes. Set the speed of the feeding motor (102) until molten resin appears below the resin nozzle (304). Step 3: Start the laser heating mechanism to preheat the area to be added to the target temperature, then start the fiber feeding mechanism (120), set the feeding rate until the continuous fiber bundle is stably conveyed to the molten resin; then start the friction stirring additive manufacturing mechanism and set the speed of the friction stirring motor (103); Step 4: Perform friction stir additive manufacturing according to the preset additive path; during this process, pressure sensor 1 (106) and pressure sensor 2 (119) provide real-time feedback of pressure values ​​and control the pressure within the preset range; at the same time, a matching mechanism between pressure and rotation speed is set: for every 2-5N increase in the pressure value of pressure sensor 1 (106), the rotation speed of the feeding motor (102) decreases by 5-10 rpm; conversely, for every 2-5N decrease in the pressure value of pressure sensor 1 (106), the rotation speed of the feeding motor (102) increases by 5-10 rpm; for every 10-20N increase in the pressure value of pressure sensor 2 (119), the rotation speed of the feeding motor (102) decreases by 50-100 rpm; conversely, for every 10-20N decrease in the pressure value of pressure sensor 2 (119), the rotation speed of the feeding motor (102) increases by 50-100 rpm; Step 5: After the additive forming is completed, shut down the device and clean the residual material in the curved groove (202).

2. The continuous fiber composite additive manufacturing method according to claim 1, characterized in that: The fiber nozzle of the continuous fiber laying mechanism is close to the resin nozzle (304) of the resin introduction mechanism, or the fiber nozzle of the continuous fiber laying mechanism is located directly below the resin nozzle (304) of the resin introduction mechanism.

3. The continuous fiber composite additive manufacturing method according to claim 2, characterized in that: The friction stirring additive manufacturing mechanism, the resin introduction mechanism, the continuous fiber laying mechanism, and the laser heating mechanism are located on the same frame (002), which is installed at the working end of the robot.

4. The continuous fiber composite additive manufacturing method according to claim 3, characterized in that: The fiber conveying channel (115) has an arc-shaped structure, and the outer arc surface of the arc-shaped structure faces the optical path guide (116). The center line of the optical path guide (116), the center line of the fiber conveying channel (115), the center line of the resin nozzle (304), and the center line of the stirring friction main shaft (110) are located in the same vertical plane.

5. The continuous fiber composite material additive manufacturing method according to claim 4, characterized in that: The direction of travel of the device during the additive manufacturing process is the direction in which the friction stir additive mechanism extends to the laser heating mechanism.

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