Friction stir welding material adding device and material adding method

Abstract

The invention relates to the technical field of solid-phase material adding, in particular to a friction stir welding material adding device and method. The friction stir welding material adding device comprises a workbench, a horizontal left-right moving mechanism is arranged at the upper end of the workbench, a horizontal front-back moving mechanism is arranged on the left side of the horizontal left-right moving mechanism, and a lifting mechanism is arranged on the left side of the horizontal front-back moving mechanism; a second moving frame is arranged on the left side of the lifting mechanism, a rotating shaft is rotationally connected into the lower end of the second moving frame, and a stirring head is fixedly connected to the lower end of the rotating shaft; a pneumatic rotating clamping jaw is fixedly connected to the bottom end in the second moving frame and is mounted on a rotating shaft; a supporting plate is fixedly connected into the second moving frame and rotationally connected with the rotating shaft, and a feeding mechanism is arranged at the upper end of the supporting plate. A feeding mechanism is arranged at the upper end of the second moving frame. According to the feeding device, manual feeding is not needed in the feeding process, so that the labor intensity of workers is reduced, and meanwhile, due to continuous feeding, the material adding effect is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of solid phase additive technology, and in particular to a friction stir welding additive device and an additive method. Background Art

[0002] Friction stir welding is a mainstream method of solid-phase additive manufacturing and an additive manufacturing technology based on the principle of friction welding. The working principle of friction stir welding additive technology is to use a consumable rod to rotate through a stirring tool to contact and rub with the substrate. The heat energy generated by friction will soften the end of the rod, and under the extrusion of the axial force, it will flow out from the outlet end of the stirring tool and deposit on the substrate. As the rod moves laterally and gradually presses down, a single additive layer is formed on the substrate. The frictional heat and friction deformation work will cause the additive layer to form fine and uniform grains under the action of temperature field and plastic deformation. The material will not melt during the friction deposition process, so that the mismatch between the substrate and the additive layer has less influence, and thus the combination of dissimilar materials can be better achieved. The grains of the additive layer are small and uniform, and the mechanical properties are good.

[0003] When the existing friction stir welding additive device is in use, in order to ensure the continuity of additive, it is necessary to continuously feed the rod raw material. At present, the rod raw material is fed manually. Although it can add material to the surface of the substrate, the rod cannot be fed continuously during the additive process, which affects the additive effect on the surface of the substrate. Therefore, it is necessary to design a friction stir welding additive device. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a friction stir welding additive device and additive method.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a stir friction welding additive device, comprising a workbench, a horizontal left and right moving mechanism is arranged at the upper end of the workbench, a horizontal front and back moving mechanism is arranged on the left side of the horizontal left and right moving mechanism, a lifting mechanism is arranged on the left side of the horizontal front and back moving mechanism, and a second moving frame is arranged on the left side of the lifting mechanism, and a rotating shaft is rotatably connected to the lower end of the second moving frame, the interior of the rotating shaft is cylindrical and hollow, and a stirring head is fixedly connected to the lower end of the rotating shaft; a pneumatic rotating clamp is fixedly connected to the bottom end of the second moving frame, and the pneumatic rotating clamp is installed on the rotating shaft; a support plate is fixedly connected to the interior of the second moving frame, and the support plate is rotatably connected to the rotating shaft, and a feeding mechanism is arranged at the upper end of the support plate; a feeding mechanism is arranged at the upper end of the second moving frame, and the feeding mechanism is used to push the rod inside the feeding mechanism into the interior of the rotating shaft; a power mechanism is arranged at the lower end of the second moving frame, and the power mechanism is used to drive the stirring head to rotate.

[0006] further: The horizontal left and right moving mechanism includes a first slide rail, a moving frame, a first motor, a rotating shaft, a gear and a rack. The front and rear sides of the workbench are fixedly connected to the first slide rail, and the moving frame is slidably connected to the first slide rail. The lower end of the moving frame is rotatably connected to the rotating shaft, and the circumferential surface of the rotating shaft is fixedly connected to a gear. Two gears are provided and symmetrically distributed on the rotating shaft; racks are fixedly connected to both sides of the lower end of the workbench, and the racks are meshed with the gears; the rear end of the moving frame is fixedly connected to the first motor, and the output end of the first motor is fixedly connected to the rotating shaft.

[0007] further: The horizontal forward and backward moving mechanism includes a support seat, a first screw rod, a second motor, a first movable seat and a second slide rail. The front and rear sides of the left end of the movable frame are fixedly connected to the support seat, the first screw rod is rotatably connected inside the support seat, and the circumferential surface of the first screw rod is threadedly connected to the first movable seat; the second slide rail is fixedly connected inside the movable frame, and the second slide rail is slidably connected to the first movable seat; the rear end of the support seat located on the rear side is fixedly connected to the second motor, and the output end of the second motor is fixedly connected to the first screw rod.

[0008] further: The lifting mechanism includes an installation frame, a third motor, a second screw rod and a second movable seat. The installation frame is fixedly connected to the left side of the first movable seat, the second screw rod is rotatably connected inside the installation frame, the second screw rod is threadedly connected to the second movable seat on the circumferential surface, the second movable seat is fixedly connected to the second movable frame, the second movable seat is slidably connected to the installation frame, the third motor is fixedly connected to the upper end of the installation frame, and the output end of the third motor is fixedly connected to the second screw rod.

[0009] further: The feeding mechanism includes a holding frame, a second cylinder and a pushing plate, the upper end of the support plate is fixedly connected to the holding frame, the internal width of the holding frame is equal to the diameter of the rod, the inside of the holding frame is slidably connected to the pushing plate, the front end of the holding frame is fixedly connected to the second cylinder, the protruding end of the second cylinder penetrates the holding frame and is slidably connected to the holding frame, and the protruding end of the second cylinder is fixedly connected to the pushing plate.

[0010] further: The feeding mechanism includes a first cylinder, a first guide rod, a first moving frame, a second guide rod, a third moving seat and a pushing rod. The upper end of the second moving frame is fixedly connected to the first cylinder, the protruding end of the first cylinder passes through the second moving frame and is slidably connected to the second moving frame, the protruding end of the first cylinder is fixedly connected to the first moving frame, the interior of the first moving frame is fixedly connected to the second guide rod, the circumferential surface of the second guide rod is slidably connected to the third moving seat, and the third moving seat is rotatably connected to the interior of the third moving seat; the upper end of the first moving frame is fixedly connected to the first guide rod, and the first guide rod is slidably connected to the second moving frame.

[0011] further: The axis of the push rod is in the same straight line as the axis of the rotating shaft, and the diameter of the push rod is smaller than the diameter of the rod.

[0012] further: The upper end of the third moving seat is rotatably connected to a transmission rod, and the end of the transmission rod away from the third moving seat is rotatably connected to a moving rod, the upper end of the moving rod passes through the first moving frame and is slidably connected to the first moving frame; a spring is provided on the circumferential surface of the second guide rod, one end of the spring is fixedly connected to the first moving frame, and the other end of the spring is fixedly connected to the third moving seat.

[0013] further: The power mechanism includes a fourth motor, a driving wheel, a driven wheel and a belt. The fourth motor is fixedly connected to the bottom end of the second moving frame. The output end of the fourth motor passes through the lower end of the second moving frame and is rotatably connected to the second moving frame. The output end of the fourth motor is fixedly connected to the driving wheel; the circumferential surface of the rotating shaft is fixedly connected to the driven wheel, and the driven wheel and the driving wheel are connected by a belt.

[0014] A material adding method of a friction stir welding material adding device, using the friction stir welding material adding device described above, comprising the following steps: S1: Load the bar material and use the feeding mechanism to feed the material to the lower end of the upper feeding mechanism; S2: When the bar reaches the lower end of the feeding mechanism, the feeding mechanism works to transport the bar into the rotating shaft; S3: The power mechanism works with the cooperation of the pneumatic rotating jaws to drive the rod inside the rotating shaft to rotate, so that the rod contacts and rubs with the substrate under high-speed rotation to form an additive layer in a plastic flow state; S4: The lifting mechanism drives the stirring head to move downward, so that the stirring head stirs and disperses the additive layer, and fully stirs and mixes the additive layer and the substrate to complete the additive manufacturing.

[0015] The present invention has the following beneficial effects: Compared with the prior art, the present invention sets a loading mechanism and a feeding mechanism. When the rods are transported inside the rotating shaft, the feeding mechanism works to push the rods to the lower end of the loading mechanism. Then, with the cooperation of the loading mechanism, the rods can be transported to the inside of the rotating shaft. In this way, the purpose of continuous loading is achieved, and manual loading is not required during the loading process, thereby reducing the labor intensity of workers. At the same time, due to continuous loading, the additive effect is also improved.

[0016] Compared with the prior art, the present invention sets a transmission rod, a moving rod and a spring. When loading, the first cylinder can drive the first moving frame to move upward by contracting, and then can drive the pushing rod to move upward with the cooperation of the third moving seat. At the same time, when the first moving frame moves upward and the moving rod contacts the second moving frame, it will squeeze the moving rod to move downward, and then can drive the third moving seat to slide on the second guide rod with the cooperation of the transmission rod, so that the pushing rod is away from the upper end of the rotating shaft and is located above the rear side of the rotating shaft. This makes it convenient for the feeding mechanism to push the rod to the upper end of the rotating shaft. When the rod reaches the upper end of the rotating shaft, it will fall into the rotating cylinder under the action of gravity, so that when loading, the stroke of the first cylinder does not need to be displaced too much, and there is no need to use an overly large cylinder, thereby reducing the overall height of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention from the first viewing angle as a whole; Figure 2 For the present invention Figure 1 Enlarged view of part A; Figure 3 For the present invention Figure 1 Enlarged view of part B; Figure 4 For the present invention Figure 1 Enlarged view of part C in the middle; Figure 5 It is a schematic diagram of the structure of the second viewing angle of the whole invention; Figure 6 For the present invention Figure 5 Enlarged view of part D in the middle; Figure 7 It is a schematic diagram of the structure of the present invention as a whole from a third viewing angle; Figure 8 For the present invention Figure 7 Enlarged view of part E in the middle; Fig. 9 It is a schematic diagram of the structure of the power mechanism of the present invention cooperating with the second moving frame; Fig.10 For the present invention Fig. 9 Enlarged view of part F in the middle; Fig.11It is a structural schematic diagram of the feeding mechanism of the present invention; Fig.12 It is a structural schematic diagram of the cooperation between the feeding mechanism and the second moving frame of the present invention; Fig.13 For the present invention Fig.12 Enlarged view of part G in the middle.

[0018] Legend: 1. Workbench; 2. Horizontal left-right moving mechanism; 201. First slide rail; 202. Moving frame; 203. First motor; 204. Rotating shaft; 205. Gear; 206. Rack; 3. Horizontal forward and backward moving mechanism; 301. Support seat; 302. First screw rod; 303. Second motor; 304. First moving seat; 305. Second slide rail; 4. Lifting mechanism; 401. Mounting frame; 402. Third motor; 403. Second screw rod; 404. Second moving seat; 5. Feeding mechanism; 501. First cylinder ; 502, first guide rod; 503, first moving frame; 504, second guide rod; 505, third moving seat; 506, pushing rod; 6, feeding mechanism; 601, containing frame; 602, second cylinder; 603, pushing plate; 7, second moving frame; 8, power mechanism; 801, fourth motor; 802, driving wheel; 803, driven wheel; 804, belt; 9, rotating shaft; 10, pneumatic rotating jaw; 11, stirring head; 12, supporting plate; 13, moving rod; 14, transmission rod; 15, spring. DETAILED DESCRIPTION

[0019] Reference Figure 1-13 The present invention provides a friction stir welding additive device, comprising a workbench 1, a horizontal left-right moving mechanism 2 is arranged at the upper end of the workbench 1, a horizontal front-back moving mechanism 3 is arranged on the left side of the horizontal left-right moving mechanism 2, a lifting mechanism 4 is arranged on the left side of the horizontal front-back moving mechanism 3, a second moving frame 7 is arranged on the left side of the lifting mechanism 4, a rotating shaft 9 is rotatably connected to the lower end of the second moving frame 7, the rotating shaft 9 is cylindrical and hollow inside, and a stirring head 11 is fixedly connected to the lower end of the rotating shaft 9; a pneumatic rotating clamp 10 is fixedly connected to the bottom end of the second moving frame 7, and the pneumatic rotating clamp 10 is installed on the rotating shaft 9; a support plate 12 is fixedly connected to the second moving frame 7, the support plate 12 is rotatably connected to the rotating shaft 9, and a feeding mechanism 6 is arranged on the upper end of the support plate 12; a feeding mechanism 5 is arranged on the upper end of the second moving frame 7, and the feeding mechanism 5 is used to push the rod inside the feeding mechanism 6 to the inside of the rotating shaft 9; a power mechanism 8 is arranged at the lower end of the second moving frame 7, and the power mechanism 8 is used to drive the stirring head 11 to rotate.

[0020] Specifically, the substrate is first fixed on the workbench 1, and then the feeding mechanism 6 is used to push the rod-shaped additive material to the upper end of the rotating shaft 9. Then, with the cooperation of the feeding mechanism 5, the rod-shaped additive material can be transported to the inside of the rotating shaft 9. Then the power mechanism 8 works, and with the cooperation of the pneumatic rotating clamp 10, the rod inside the rotating shaft 9 can be driven to rotate, and the stirring head 11 is also driven to rotate. Under the high-speed rotation state, the rod and the substrate are in contact and friction to form an additive layer in a plastic flow state. At the same time, with the cooperation of the lifting mechanism 4, the stirring head 11 can be driven to move downward, so that the stirring head 11 stirs and disperses the additive layer, and fully stirs and mixes the additive layer and the substrate to complete the additive manufacturing; at the same time, with the cooperation of the horizontal left and right moving mechanism 2 and the horizontal front and back moving mechanism 3, a large range of additive can be performed on the upper end of the substrate.

[0021] The horizontal left-right moving mechanism 2 includes a first slide rail 201, a moving frame 202, a first motor 203, a rotating shaft 204, a gear 205 and a rack 206. The first slide rail 201 is fixedly connected to the front and rear sides of the workbench 1. The moving frame 202 is slidably connected to the first slide rail 201. The lower end of the moving frame 202 is internally rotatably connected to the rotating shaft 204. The circumferential surface of the rotating shaft 204 is fixedly connected to the gear 205. Two gears 205 are provided and symmetrically distributed on the rotating shaft 204; two gears 205 are provided at the lower end of the workbench 1. The two sides are fixedly connected with a rack 206, and the rack 206 is meshed with the gear 205; the rear end of the movable frame 202 is fixedly connected with the first motor 203, and the output end of the first motor 203 is fixedly connected with the rotating shaft 204. When working, the first motor 203 works, and then the rotating shaft 204 can be driven to rotate, thereby driving the gear 205 to rotate, and then the movable frame 202 can be driven to move left and right on the first slide rail 201 with the cooperation of the rack 206, so as to facilitate the addition of materials on the substrate left and right.

[0022] The horizontal forward and backward moving mechanism 3 includes a support seat 301, a first screw rod 302, a second motor 303, a first movable seat 304 and a second slide rail 305. The front and rear sides of the left end of the movable frame 202 are fixedly connected with the support seat 301, the first screw rod 302 is rotatably connected inside the support seat 301, and the first movable seat 304 is threadedly connected to the circumferential surface of the first screw rod 302; the second slide rail 305 is fixedly connected inside the movable frame 202, and the second slide rail 305 and the first movable seat 304 are slidably connected; the rear end of the support seat 301 located on the rear side is fixedly connected to the second motor 303, and the output end of the second motor 303 is fixedly connected to the first screw rod 302. When working, the second motor 303 works, and at this time, with the cooperation of the first screw rod 302, the first movable seat 304 can be driven to slide on the second slide rail 305, thereby facilitating the forward and backward addition of materials on the substrate.

[0023] The lifting mechanism 4 includes a mounting frame 401, a third motor 402, a second screw rod 403 and a second movable seat 404. The mounting frame 401 is fixedly connected to the left side of the first movable seat 304, and the second screw rod 403 is rotatably connected inside the mounting frame 401. The second movable seat 404 is threadedly connected to the circumferential surface of the second screw rod 403. The second movable seat 404 is fixedly connected to the second movable frame 7, and the second movable seat 404 is slidably connected to the mounting frame 401. The third motor 402 is fixedly connected to the upper end of the mounting frame 401, and the output end of the third motor 402 is fixedly connected to the second screw rod 403. When working, the third motor 402 works, and with the cooperation of the second screw rod 403, it can drive the second movable seat 404 to slide inside the mounting frame 401, and then drive the second movable frame 7 to move up and down. When the second movable frame 7 moves downward, it can drive the stirring head 11 to move downward, so that it is convenient for the stirring head 11 to fully stir and mix the additive layer and the substrate.

[0024] The feeding mechanism 6 includes a containing frame 601, a second cylinder 602 and a pushing plate 603. The containing frame 601 is fixedly connected to the upper end of the support plate 12. The internal width of the containing frame 601 is equal to the diameter of the rod. The pushing plate 603 is slidably connected inside the containing frame 601. The front end of the containing frame 601 is fixedly connected to the second cylinder 602. The protruding end of the second cylinder 602 penetrates the containing frame 601 and is slidably connected to the containing frame 601. The protruding end of the second cylinder 602 is fixedly connected to the pushing plate 603. When working, the second cylinder 602 extends, and at this time, with the cooperation of the pushing plate 603, the rod inside the containing frame 601 can be pushed to move, thereby facilitating the pushing of the rod to the upper end of the rotating shaft 9.

[0025] The feeding mechanism 5 includes a first cylinder 501, a first guide rod 502, a first moving frame 503, a second guide rod 504, a third moving seat 505 and a push rod 506. The first cylinder 501 is fixedly connected to the upper end of the second moving frame 7. The extended end of the first cylinder 501 penetrates the second moving frame 7 and is slidably connected to the second moving frame 7. The extended end of the first cylinder 501 is fixedly connected to the first moving frame 503. The second guide rod 504 is fixedly connected inside the first moving frame 503. The third moving seat 505 is slidably connected to the circumferential surface of the second guide rod 504. The push rod 506 is rotatably connected inside the third moving seat 505. The first guide rod 502 is fixedly connected to the upper end of the first moving frame 503. The first guide rod 502 is slidably connected to the second moving frame 7. The axis of the push rod 506 is in the same straight line as the axis of the rotating shaft 9, and the diameter of the push rod 506 is smaller than the diameter of the bar. During operation, when the rod is transported to the inside of the rotating shaft 9, the first cylinder 501 extends, and at this time, the cooperation with the first guide rod 502 can drive the first moving frame 503 to move downward stably, and then drive the third moving seat 505 and the pushing rod 506 to move downward. As the pushing rod 506 moves downward, the pushing rod 506 pushes the rod, which makes it convenient for the rod to contact the substrate, thereby facilitating the addition of an additive layer on the surface of the substrate; when it is necessary to move a rod up or down, the first cylinder 501 contracts, which can drive the pushing rod 506 to move upward, so that the lower end of the pushing rod 506 is higher than the upper end of the containing frame 601, which is convenient for moving a rod up or down.

[0026] The upper end of the third moving seat 505 is rotatably connected to a transmission rod 14, and one end of the transmission rod 14 away from the third moving seat 505 is rotatably connected to a moving rod 13, and the upper end of the moving rod 13 passes through the first moving frame 503 and is slidably connected to the first moving frame 503; a spring 15 is provided on the circumferential surface of the second guide rod 504, one end of the spring 15 is fixedly connected to the first moving frame 503, and the other end of the spring 15 is fixedly connected to the third moving seat 505. When working, when moving a bar up and down, the first cylinder 501 can be retracted to drive the first moving frame 503 to move up, and then the push rod 506 can be driven with the cooperation of the third moving seat 505. The first movable frame 503 moves upward, and at the same time, the upward movement of the first movable frame 503 when the movable rod 13 contacts the second movable frame 7 will squeeze the movable rod 13 downward, and then with the cooperation of the transmission rod 14, the third movable seat 505 can be driven to slide on the second guide rod 504, so that the pushing rod 506 is away from the upper end of the rotating shaft 9 and is located above the rear side of the rotating shaft 9, so that it is convenient for the feeding mechanism 6 to push the rod to the upper end of the rotating shaft 9. When the rod reaches the upper end of the rotating shaft 9, the rod will fall into the rotating cylinder under the action of gravity, so that when loading, the stroke of the first cylinder 501 does not need to be displaced too much, and there is no need to use an overly large cylinder, thereby reducing the overall height of the equipment.

[0027] The power mechanism 8 includes a fourth motor 801, a driving wheel 802, a driven wheel 803 and a belt 804. The fourth motor 801 is fixedly connected to the bottom end of the second moving frame 7. The output end of the fourth motor 801 passes through the lower end of the second moving frame 7 and is rotatably connected to the second moving frame 7. The output end of the fourth motor 801 is fixedly connected to the driving wheel 802; the circumferential surface of the rotating shaft 9 is fixedly connected to the driven wheel 803, and the driven wheel 803 is connected to the driving wheel 802 through the belt 804. When working, the fourth motor 801 works, and at this time, the rotating shaft 9 can be driven to rotate with the cooperation of the driving wheel 802, the driven wheel 803 and the belt 804. As the rotating shaft 9 rotates, an additive layer can be formed on the surface of the substrate with the cooperation of the stirring head 11 and the rod.

[0028] A material adding method of a friction stir welding material adding device, using the friction stir welding material adding device described above, comprising the following steps: S1: Load the bar material and use the feeding mechanism 6 to feed the material to the lower end of the upper feeding mechanism 5; S2: When the rod reaches the lower end of the feeding mechanism 5, the feeding mechanism 5 works to transport the rod to the inside of the rotating shaft 9; S3: The power mechanism 8 works in cooperation with the pneumatic rotating jaw 10 to drive the rod inside the rotating shaft 9 to rotate, so that the rod contacts and rubs with the base material under high-speed rotation to form an additive layer in a plastic flow state; S4: the lifting mechanism 4 works to drive the stirring head 11 to move downward, so that the stirring head 11 stirs and disperses the additive layer, and fully stirs and mixes the additive layer and the substrate to complete the additive manufacturing.

[0029] Working principle: When in use, first fix the substrate on the workbench 1, and then the second cylinder 602 extends, and at this time, with the cooperation of the push plate 603, the rod inside the holding frame 601 can be pushed to move, so as to facilitate the pushing of the rod to the upper end of the rotating shaft 9. After the rod reaches the upper end of the rotating shaft 9, under the action of gravity, the rod will fall into the rotating shaft 9, and then the first cylinder 501 extends, and at this time, with the cooperation of the first guide rod 502, the first moving frame 503 can be driven to move downward stably, and then the third moving seat 505 and the push rod 506 can be driven downward. As the push rod 506 moves downward, the push rod 506 pushes the rod, which is convenient The rod is in contact with the substrate, so it is convenient to add an additive layer on the surface of the substrate; after the rod is in contact with the substrate, the power mechanism 8 works, and at this time, with the cooperation of the pneumatic rotating clamp 10, the rod inside the rotating shaft 9 can be driven to rotate, and the stirring head 11 can also be driven to rotate, so that the rod and the substrate are in contact and friction with each other under high-speed rotation to form an additive layer in a plastic flow state, and at the same time, with the cooperation of the lifting mechanism 4, the stirring head 11 can be driven downward, so that the stirring head 11 stirs and disperses the additive layer, and fully stirs and mixes the additive layer and the substrate to complete additive manufacturing; at the same time, with the cooperation of the horizontal left and right moving mechanism 2 and the horizontal front and back moving mechanism 3, a large range of additive can be carried out on the upper end of the substrate.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A friction stir welding additive device, comprising a workbench (1), characterized in that: The workbench (1) is provided with a horizontal left-right moving mechanism (2) at the upper end, a horizontal front-back moving mechanism (3) is provided on the left side of the horizontal left-right moving mechanism (2), a lifting mechanism (4) is provided on the left side of the horizontal front-back moving mechanism (3), a second moving frame (7) is provided on the left side of the lifting mechanism (4), a rotating shaft (9) is rotatably connected to the lower end of the second moving frame (7), the interior of the rotating shaft (9) is cylindrical and hollow, and a stirring head (11) is fixedly connected to the lower end of the rotating shaft (9); a pneumatic rotating clamp (10) is fixedly connected to the lower end of the second moving frame (7). The pneumatic rotating clamp (10) is mounted on the rotating shaft (9); a support plate (12) is fixedly connected to the inside of the second movable frame (7), the support plate (12) is rotatably connected to the rotating shaft (9), and a feeding mechanism (6) is arranged at the upper end of the support plate (12); a loading mechanism (5) is arranged at the upper end of the second movable frame (7), and the loading mechanism (5) is used to push the rod inside the feeding mechanism (6) into the rotating shaft (9); a power mechanism (8) is arranged at the lower end of the second movable frame (7), and the power mechanism (8) is used to drive the stirring head (11) to rotate.

2. A friction stir welding additive device according to claim 1, characterized in that: The horizontal left-right moving mechanism (2) comprises a first slide rail (201), a moving frame (202), a first motor (203), a rotating shaft (204), a gear (205) and a rack (206); the first slide rail (201) is fixedly connected to both the front and rear sides of the workbench (1); the moving frame (202) is slidably connected to the first slide rail (201); the lower end of the moving frame (202) is internally rotatably connected to the rotating shaft (204); the circumferential surface of the rotating shaft (204) is fixedly connected to the gear (205); two gears (205) are provided and symmetrically distributed on the rotating shaft (204); both sides of the lower end of the workbench (1) are fixedly connected to the rack (206), and the rack (206) is meshed with the gear (205); the rear end of the moving frame (202) is fixedly connected to the first motor (203), and the output end of the first motor (203) is fixedly connected to the rotating shaft (204).

3. A friction stir welding additive device according to claim 2, characterized in that: The horizontal forward and backward moving mechanism (3) comprises a support seat (301), a first screw rod (302), a second motor (303), a first moving seat (304) and a second slide rail (305); the left end of the moving frame (202) is fixedly connected to the support seat (301) at both the front and rear sides; the support seat (301) is rotatably connected to the first screw rod (302) inside; the first screw rod (302) is threadedly connected to the first moving seat (304) on its circumferential surface; the moving frame (202) is fixedly connected to the second slide rail (305); the second slide rail (305) is slidably connected to the first moving seat (304); the rear end of the support seat (301) located at the rear side is fixedly connected to the second motor (303); the output end of the second motor (303) is fixedly connected to the first screw rod (302).

4. A friction stir welding additive device according to claim 3, characterized in that: The lifting mechanism (4) comprises a mounting frame (401), a third motor (402), a second screw rod (403) and a second movable seat (404); the first movable seat (304) is fixedly connected to the mounting frame (401) on the left side; the second screw rod (403) is rotatably connected inside the mounting frame (401); the second screw rod (403) is threadedly connected to the second movable seat (404) on the circumferential surface; the second movable seat (404) is fixedly connected to the second movable frame (7); the second movable seat (404) is slidably connected to the mounting frame (401); the third motor (402) is fixedly connected to the upper end of the mounting frame (401); and the output end of the third motor (402) is fixedly connected to the second screw rod (403).

5. The friction stir welding additive device according to claim 1, characterized in that: The feeding mechanism (6) comprises a containing frame (601), a second cylinder (602) and a pushing plate (603); the upper end of the support plate (12) is fixedly connected to the containing frame (601); the internal width of the containing frame (601) is equal to the diameter of the rod; the pushing plate (603) is slidably connected inside the containing frame (601); the front end of the containing frame (601) is fixedly connected to the second cylinder (602); the protruding end of the second cylinder (602) passes through the containing frame (601) and is slidably connected to the containing frame (601); the protruding end of the second cylinder (602) is fixedly connected to the pushing plate (603).

6. The friction stir welding additive device according to claim 1, characterized in that: The feeding mechanism (5) comprises a first cylinder (501), a first guide rod (502), a first moving frame (503), a second guide rod (504), a third moving seat (505) and a push rod (506); the upper end of the second moving frame (7) is fixedly connected to the first cylinder (501); the protruding end of the first cylinder (501) passes through the second moving frame (7) and is slidably connected to the second moving frame (7); the protruding end of the first cylinder (501) is fixedly connected to the first moving frame (503); the first moving frame (503) is fixedly connected to the second guide rod (504); the circumferential surface of the second guide rod (504) is slidably connected to the third moving seat (505); the third moving seat (505) is rotatably connected to the push rod (506); the upper end of the first moving frame (503) is fixedly connected to the first guide rod (502); the first guide rod (502) and the second moving frame (7) are slidably connected.

7. A friction stir welding additive device according to claim 6, characterized in that: The axis of the push rod (506) and the axis of the rotating shaft (9) are on the same straight line, and the diameter of the push rod (506) is smaller than the diameter of the rod.

8. The friction stir welding additive device according to claim 6, characterized in that: The upper end of the third movable seat (505) is rotatably connected to a transmission rod (14), and one end of the transmission rod (14) away from the third movable seat (505) is rotatably connected to a movable rod (13), and the upper end of the movable rod (13) passes through the first movable frame (503) and is slidably connected to the first movable frame (503); a spring (15) is provided on the circumferential surface of the second guide rod (504), one end of the spring (15) is fixedly connected to the first movable frame (503), and the other end of the spring (15) is fixedly connected to the third movable seat (505).

9. The friction stir welding additive device according to claim 1, characterized in that: The power mechanism (8) comprises a fourth motor (801), a driving wheel (802), a driven wheel (803) and a belt (804); the fourth motor (801) is fixedly connected to the bottom end of the second moving frame (7); the output end of the fourth motor (801) passes through the lower end of the second moving frame (7) and is rotatably connected to the second moving frame (7); the output end of the fourth motor (801) is fixedly connected to the driving wheel (802); the circumferential surface of the rotating shaft (9) is fixedly connected to the driven wheel (803); the driven wheel (803) and the driving wheel (802) are connected via a belt (804).

10. A material adding method using a friction stir welding material adding device, using the friction stir welding material adding device according to any one of claims 1 to 9, characterized in that: The following steps are included: S1: loading the bar material and feeding the bar material to the lower end of the upper feeding mechanism (5) by using the feeding mechanism (6); S2: When the rod reaches the lower end of the feeding mechanism (5), the feeding mechanism (5) works to transport the rod into the interior of the rotating shaft (9); S3: The power mechanism (8) works in cooperation with the pneumatic rotating jaw (10) to drive the rod inside the rotating shaft (9) to rotate, so that the rod contacts and rubs with the base material under high-speed rotation to form an additive layer in a plastic flow state; S4: The lifting mechanism (4) works to drive the stirring head (11) to move downward, so that the stirring head (11) stirs and disperses the additive layer, and fully stirs and mixes the additive layer and the substrate, thereby completing additive manufacturing.

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