Friction stir additive manufacturing device and control method

Abstract

The present invention relates to the technical field of friction stir additive manufacturing, and the present invention discloses a friction stir additive manufacturing device and a control method, wherein the friction stir additive manufacturing device comprises: a wire feeding mechanism and an additive manufacturing welding tool; the wire feeding mechanism comprises: a wire feeder, the wire feeder is suitable for driving wire to feed wire to the additive manufacturing welding tool; a first bracket, the first bracket is located at the rear end of the wire feeder, and the first bracket is suitable for vertical elastic deformation; a wire feeding nozzle, the wire feeding nozzle is located at the rear end of the first bracket, and the wire feeding nozzle is suitable for rotating in the horizontal direction, one end of the wire feeding nozzle extends obliquely toward the main axis of the additive manufacturing welding tool, and the aperture of the inlet of the wire feeding nozzle is larger than the aperture of the outlet of the wire feeding nozzle. The wire feeding mechanism of the present invention can deform adaptively, prevent wire blockage, and improve the smoothness of wire feeding.

Description

Technical Field

[0001] The present invention relates to the technical field of friction stir additive manufacturing, and in particular to a friction stir additive manufacturing device and a control method. Background Art

[0002] During the wire feeding process of friction stir additive manufacturing, the wire needs to be fed in continuously to achieve continuous additive manufacturing. However, since the cutting of wire by the additive manufacturing welding tool is an intermittent process, the wire will be blocked. At the same time, the cutting of wire by the additive manufacturing welding tool involves a reciprocating process of cutting and not cutting the wire. This reciprocating process will also cause the wire to be subjected to huge stress, which may cause deformation of the welding tool and increase the difficulty of wire feeding.

[0003] In order to solve these problems, the present invention proposes a friction stir additive manufacturing device. Summary of the invention

[0004] The purpose of the present invention is to provide a stir friction additive manufacturing device and a control method to address the deficiencies in the prior art, thereby solving the problem in the prior art that the wire cutting process of the additive manufacturing welding tool is an intermittent process, which may cause the wire to experience wire blockage.

[0005] To achieve the above-mentioned objectives, on the one hand, the present invention provides a friction stir additive manufacturing device, comprising: a wire feeding mechanism and an additive manufacturing welding tool; the wire feeding mechanism comprises: a wire feeder, the wire feeder is suitable for driving the wire to feed the additive manufacturing welding tool; a first bracket, the first bracket is located at the rear end of the wire feeder, and the first bracket is suitable for vertical elastic deformation; a wire feeding nozzle, the wire feeding nozzle is located at the rear end of the first bracket, and the wire feeding nozzle is suitable for rotating in the horizontal direction, one end of the wire feeding nozzle extends obliquely toward the main axis of the additive manufacturing welding tool, and the aperture of the inlet of the wire feeding nozzle is larger than the aperture of the outlet of the wire feeding nozzle.

[0006] The advantage of the friction stir additive manufacturing equipment over the prior art is that the present invention provides a first bracket suitable for elastic deformation in the vertical direction. When wire blockage occurs, the first bracket can be deformed to absorb deformation resistance and reduce wire stress at the same time. When the wire is fed normally, the first bracket can be deformed and restored to facilitate the absorption of stress next time. In addition, the wire feeding nozzle is suitable for rotating in the horizontal direction and can adapt to changes to avoid wire blockage. Therefore, even if the additive manufacturing welding tool cuts the wire intermittently, the wire feeding mechanism of the present invention can deform adaptively to prevent wire blockage and improve the smoothness of wire feeding.

[0007] In some embodiments, the wire feeding mechanism further includes: a second bracket, the second bracket is connected to the first bracket, and the wire feeding nozzle is rotatably connected to the first bracket through the second bracket.

[0008] In some embodiments, a vertical slide groove is provided in the first bracket, and the second bracket can be slidably installed in the slide groove.

[0009] In some embodiments, the second bracket includes: a rotating part, at least a portion of the second bracket extends out of the slide groove to form the rotating part; a wire feeding part, the wire feeding nozzle is installed on the wire feeding part, and the wire feeding part is rotatably connected to the rotating part along the horizontal direction, wherein a side of the rotating part facing the wire feeding nozzle is an arc surface, and the wire feeding part is provided with a rotating groove matching the shape of the arc surface, so that the arc surface fits in the rotating groove.

[0010] In some embodiments, the wire feeder includes: a frame, which is arranged on one side of the additive manufacturing welding tool; a wire feeding tube, which is arranged on the frame; a wire guide nozzle, which is arranged on the frame and opposite to the wire feeding tube; a transmission mechanism, which is arranged on the frame and located between the wire feeding tube and the wire guide nozzle, and the transmission mechanism is used to transport the wire in the wire feeding tube to the wire guide nozzle, and the wire in the wire guide nozzle to the wire feeding nozzle.

[0011] In some embodiments, the transmission mechanism includes: two wire feeding wheels, the two wire feeding wheels are axially parallel, and the wire passes between the two wire feeding wheels so that the wire feeding wheels drive the wire to the wire guide nozzle; a driving member, the driving member is power-coupled with the two wire feeding wheels to drive the wire feeding wheels to rotate.

[0012] In some embodiments, the driving member includes: a driving motor; a first transmission shaft, the first transmission shaft is rotatably mounted on the frame, the input end of the first transmission shaft is dynamically coupled to the output end of the driving motor, and the output end of the first transmission shaft is fixedly connected to one of the wire feeding wheels.

[0013] In some embodiments, the wire feeding wheel includes a guide portion and a driving portion, the driving portion is located at an end of the guide portion away from the first transmission shaft, the guide portions of the two wire feeding wheels are suitable for clamping the wire, and the driving portions of the two wire feeding wheels are constructed as gears that mesh with each other.

[0014] In some embodiments, the drive motor is connected to the first transmission shaft through a steering member, and the steering member includes: a second transmission shaft, the second transmission shaft is rotatably mounted on the frame, the axis of the second transmission shaft is perpendicular to the axis of the first transmission shaft, the second transmission shaft includes a first shaft section and a second shaft section connected to each other, the diameter of the first shaft section is larger than the diameter of the second shaft section, one end of the first shaft section has a keyway, the output end of the drive motor is connected to the keyway through a spline, and the length of the output end of the drive motor located in the keyway is less than the groove depth of the keyway; a first bevel gear, the first bevel gear is arranged on the second shaft section; a second bevel gear, the second bevel gear is arranged on the first transmission shaft, and the first bevel gear is meshed with the second bevel gear.

[0015] On the other hand, the present invention also proposes a control method for a stir friction additive manufacturing device, which is used to control the stir friction additive manufacturing device described in the above technical solution, and the control method includes the following steps: S1, feeding the wire into the wire feeding tube so that one end of the wire is clamped between the two wire feeding wheels, and extends between the two wire feeding wheels to the wire guide nozzle, and then fed from the wire guide nozzle to the wire feeding nozzle; S2, starting the drive motor to rotate at a predetermined speed, thereby driving the wire feeding wheel to rotate, and continuously feeding the wire into the wire feeding nozzle through the transmission mechanism, and the position of the wire feeding nozzle changes adaptively; S3, the wire feeding nozzle further transports the wire to the main shaft of the additive manufacturing welding tool to realize the wire feeding process.

[0016] The control method of the friction stir additive manufacturing device has the same advantages as the above-mentioned friction stir additive manufacturing device over the prior art, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a structural schematic diagram of a wire feeding mechanism according to an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of a connection structure of a first bracket and a second bracket according to an embodiment of the present invention;

[0020] Figure 3 Schematic diagram of the cooperation between the wire feeding nozzle and the additive manufacturing welding tool according to an embodiment of the present invention;

[0021] Figure 4 is a schematic structural diagram of a transmission mechanism according to an embodiment of the present invention;

[0022] Figure 5It is a flow chart of a control method of a friction stir additive manufacturing device according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] 10. Wire feeding mechanism; 11. Wire feeding machine; 111. Machine frame; 112. Wire feeding tube; 113. Wire guide nozzle; 12. First bracket; 13. Wire feeding nozzle; 131. Inlet; 132. Outlet; 14. Second bracket; 141. Slide; 142. Rotating part; 143. Wire feeding part; 144. Rotating groove; 20. Additive manufacturing welding tool; 30. Transmission mechanism; 31. Wire feeding wheel; 311. Guide part; 312. Driving part; 32. Driving member; 321. Driving motor; 322. First transmission shaft; 33. Steering member; 331. Second transmission shaft; 332. First bevel gear; 333. Second bevel gear. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] Reference below Figure 1-Figure 4The friction stir additive manufacturing device according to an embodiment of the present invention is described, comprising a wire feeding mechanism 10 and an additive manufacturing welding tool 20, wherein the wire feeding mechanism 10 is used to feed wire to the additive manufacturing welding tool 20. The wire feeding mechanism 10 comprises: a wire feeder 11, a first bracket 12 and a wire feeding nozzle 13, and the wire feeder 11 is suitable for driving the wire to feed the additive manufacturing welding tool 20. The first bracket 12 is located at the rear end of the wire feeder 11, and the first bracket 12 is suitable for elastic deformation in the vertical direction, that is, the first bracket 12 can adaptively deform with the movement of the wire, thereby making the wire feeding nozzle 13 installed on the first bracket 12 move, and the elastic deformation of the first bracket 12 moves with the wire, so that the wire feeding nozzle 13 can adapt to the change of the feeding speed of the wire or the swing of the wire, wherein the elastic deformation of the first bracket 12 is that the first bracket 12 maintains a fixed shape when no force is applied, and deforms and stores elastic potential energy after being subjected to force such as wire swing, and has the ability to restore the above-mentioned fixed shape when the first bracket 12 is not subjected to force. Therefore, the first bracket 12 can move with the wire, and then adapt to the change and swing of the wire feeding speed of the wire. When wire blockage occurs, the first bracket 12 can be elastically deformed vertically to absorb deformation resistance, thereby preventing wire blockage. The wire feeding nozzle 13 is located at the rear end of the first bracket 12, and the wire feeding nozzle 13 is suitable for rotating in the horizontal direction, that is, the wire feeding nozzle 13 can rotate and the rotation axis is in the horizontal direction. When the wire feeding nozzle 13 is subjected to the pressure of the wire feeding, it will rotate along the horizontal axis, thereby driving the end of the wire feeding nozzle 13 that outputs the wire to approach or move away from the additive manufacturing welding tool 20. One end of the wire feeding nozzle 13 extends obliquely toward the main axis of the additive manufacturing welding tool 20. The wire feeding nozzle 13 can adjust the direction according to the actual situation to ensure that the wire can be accurately delivered to the additive manufacturing welding tool 20, and when the wire is blocked, the wire feeding nozzle 13 can rotate to adapt to the deformation of the wire.

[0027] like Figure 2 As shown, the aperture of the inlet 131 of the wire feeding nozzle 13 is larger than the aperture of the outlet 132 of the wire feeding nozzle 13, so that when the wire is input from the inlet 131 of the wire feeding nozzle 13, the edge at the inlet 131 can leave a margin for the disturbance of the wire, thereby preventing the wire from being excessively constrained and causing breakage. After the wire is output from the outlet 132 of the wire feeding nozzle 13, it can provide a limitation for the wire conveying process, so that the wire can be better conveyed to the additive manufacturing welding tool 20 through the wire feeding nozzle 13.

[0028] Specifically, in the embodiment of the present invention, the direction of wire feeding is used as the reference direction, and the end located in the wire forward direction is defined as the front end. When the wire moves along this direction, it will first reach this end; the other end opposite to the front end is defined as the rear end. When the wire moves along the reference direction, it will finally reach this end. In the embodiment of the present invention, the length direction of the wire feeding mechanism 10 is used as a reference, and the direction extending in the length direction of the wire feeding mechanism 10 is defined as the horizontal direction, that is, Figure 1The X direction shown in FIG. 1 is defined as the vertical direction, that is, the direction in which the height direction of the wire feeding mechanism 10 is extended. Figure 1 The first bracket 12 has a fixed end connected to the additive manufacturing welding tool 20 and a movable end arranged opposite to the fixed end. The movable end of the first bracket 12 extends away from the additive manufacturing welding tool 20. When the first bracket 12 is not subjected to force, it maintains a fixed shape. When wire blockage occurs, the pressure of the wire on the first bracket 12 causes the movable end of the first bracket 12 to elastically deform upward or downward with the fixed end as the base point.

[0029] In some specific examples, the first bracket 12 is configured as a plate-like structure, including a first plate and a second plate, both of which are arranged horizontally, wherein the area of ​​the first plate is greater than that of the second plate, and the first plate is fixedly connected to one side of the additive manufacturing welding tool 20, the second plate and the first plate can be integrally formed, and the second plate extends horizontally to a side away from the additive manufacturing welding tool 20. By connecting the first plate with a larger area to the additive manufacturing welding tool 20, the stability of the installation of the wire feed nozzle 13 can be improved.

[0030] According to one embodiment of the present invention, referring to Figure 2 , Figure 3 The wire feeding mechanism 10 further includes: a second bracket 14, the second bracket 14 is connected to the first bracket 12, and the wire feeding nozzle 13 is rotatably connected to the first bracket 12 through the second bracket 14. By providing the second bracket 14, a stable support is provided for the wire feeding nozzle 13, so that the wire feeding nozzle 13 can be smoothly and accurately rotated to a desired position.

[0031] According to one embodiment of the present invention, referring to Figure 2 A vertical slide groove 141 is provided in the first bracket 12, and the second bracket 14 is slidably installed in the slide groove 141. The second bracket 14 and the slide groove 141 can be connected by bolts to facilitate adjustment of the position of the second bracket 14 relative to the first bracket 12. Through the restriction of the vertical slide groove 141, the overall height of the wire feeding nozzle 13 can be easily adjusted, and then the specific position of the wire feeding nozzle 13 can be adjusted according to actual needs.

[0032] In some specific examples, the first bracket 12 also includes a third plate, which is fixedly connected to the lower end surface of the second plate and is arranged vertically. A slide groove 141 is formed on the third plate, and multiple slide grooves 141 can be arranged at intervals along the horizontal direction of the third plate. The second bracket 14 is formed with multiple vertical strip grooves, and the multiple strip grooves correspond one-to-one to the multiple slide grooves 141. Each slide groove 141 is provided with at least one bolt, and the first bracket 12 and the second bracket 14 are connected by the bolts passing through the slide groove 141 and the corresponding strip groove in sequence. By setting multiple slide grooves 141 and multiple strip grooves, the contact area between the first bracket 12 and the second bracket 14 can be increased, thereby improving the connection stability between the first bracket 12 and the second bracket 14.

[0033] According to one embodiment of the present invention, referring to Figure 2 The second bracket 14 includes: a rotating part 142 and a wire feeding part 143. At least a portion of the second bracket 14 extends out of the slide groove 141 to form the rotating part 142. The wire feeding nozzle 13 is installed on the wire feeding part 143. The wire feeding part 143 is rotatably connected to the rotating part 142 along the horizontal direction. The side of the rotating part 142 facing the wire feeding nozzle 13 is an arc surface. The wire feeding part 143 is provided with a rotating groove 144 matching the shape of the arc surface so that the arc surface fits in the rotating groove 144.

[0034] Since the wire feeding part 143 is rotatably connected to the rotating part 142 in the horizontal direction, the position of the wire feeding nozzle 13 can be flexibly adjusted according to the processing needs. The side of the rotating part 142 facing the wire feeding nozzle 13 is an arc surface, and the wire feeding part 143 is provided with a rotating groove 144 matching the shape of the arc surface. This matching mode enables the arc surface to move smoothly in the rotating groove 144 when the wire feeding part 143 is adjusted in angle, reducing the shaking or displacement of the wire feeding nozzle 13 caused by unstable connection, thereby improving the stability of the entire wire feeding system.

[0035] In some specific examples, the wire feed nozzle 13 is installed at one end of the wire feeding part 143 facing the additive manufacturing welding tool 20, and a guide hole is formed at one end of the wire feeding part 143 facing away from the additive manufacturing welding tool 20, and the axis of the guide hole is located on the same straight line as the axis of the wire feed nozzle 13. The end of the wire passes through the guide hole and enters the wire feeding nozzle 13, and is transported to the main shaft of the additive manufacturing welding tool 20 through the wire feeding nozzle 13, and the aperture of the guide hole is larger than the diameter of the wire, so as to allow the wire to be adjusted within a certain range in the guide hole, thereby reducing the friction between the wire and the wire feeding part 143. Preferably, the aperture of the guide hole decreases from the end facing away from the wire feeding nozzle 13 to the end adjacent to the wire feeding nozzle 13, so as to smoothly guide the wire into the wire feeding nozzle 13.

[0036] According to one embodiment of the present invention, referring to Figure 1 , Figure 2 and Figure 4The wire feeder 11 includes: a frame 111, a wire feeding tube 112, a wire guide nozzle 113 and a transmission mechanism 30. The frame 111 is arranged on one side of the additive manufacturing welding tool 20 to improve the compactness of the overall structural layout. The wire feeding tube 112 is arranged on the frame 111, and the wire guide nozzle 113 is arranged on the frame 111 and is arranged opposite to the wire feeding tube 112. The transmission mechanism 30 is arranged on the frame 111 and is located between the wire feeding tube 112 and the wire guide nozzle 113. The end of the wire feeding tube 112 close to the transmission mechanism 30 is aligned with the end of the wire guide nozzle 113 close to the transmission mechanism 30. The transmission mechanism 30 is used to transport the wire in the wire feeding tube 112 to the wire guide nozzle 113 to avoid bending during the wire transportation process and improve the stability of the wire transportation process. The wire in the wire guide nozzle 113 is transported to the wire feeding nozzle 13.

[0037] According to one embodiment of the present invention, referring to Figure 1 , Figure 4 The transmission mechanism 30 includes: two wire feeding wheels 31 and a driving member 32. The two wire feeding wheels 31 are axially parallel, and the wire passes between the two wire feeding wheels 31 so that the wire feeding wheels 31 drive the wire to the wire guide nozzle 113. The driving member 32 is power-coupled with the two wire feeding wheels 31 to drive the wire feeding wheels 31 to rotate.

[0038] Specifically, the axes of the two wire feeding wheels 31 are arranged vertically, the wire passes through the two wire feeding wheels 31, and the two wire feeding wheels 31 are driven to rotate by the driving member 32. The wire is clamped and pushed by the two wire feeding wheels 31 and moves along a predetermined path to the wire guide nozzle 113 to ensure stability during the wire transportation process.

[0039] According to one embodiment of the present invention, referring to Figure 4 The driving member 32 includes: a driving motor 321 and a first transmission shaft 322. The first transmission shaft 322 is rotatably mounted on the frame 111. The input end of the first transmission shaft 322 is coupled to the output end of the driving motor 321 by power coupling, and the output end of the first transmission shaft 322 is fixedly connected to one of the wire feeding wheels 31. The driving motor 321 is mounted on the frame 111. When the driving motor 321 is started, the power generated by the driving motor 321 is transmitted to the wire feeding wheel 31 connected to the first transmission shaft 322 through the first transmission shaft 322, driving the wire feeding wheel 31 to rotate to achieve stable conveying of the wire material.

[0040] According to one embodiment of the present invention, referring to Figure 1 and Figure 4The wire feeding wheel 31 includes a guide portion 311 and a driving portion 312. The driving portion 312 is located at one end of the guide portion 311 away from the first transmission shaft 322. The guide portions 311 of the two wire feeding wheels 31 are suitable for clamping the wire, and the driving portions 312 of the two wire feeding wheels 31 are constructed as gears that mesh with each other. The guide portion 311 is responsible for clamping the wire to ensure its straight-line travel and stable position during the conveying process. When one wire feeding wheel 31 receives power from the first transmission shaft 322 and starts to rotate, the power can be directly transmitted to the other wire feeding wheel 31 through the gears that mesh with each other to achieve synchronous rotation. Constructing the driving portions 312 of the two wire feeding wheels 31 as gears that mesh with each other is conducive to realizing that the two wire feeding wheels 31 rotate at the same speed, avoiding the distortion or breakage of the wire due to the inconsistent rotation speed of the two wire feeding wheels 31.

[0041] During the wire feeding process, the wire is first fed between the guide parts 311 of the two wire feeding wheels 31. With the start of the drive motor 321, the power is transmitted to one of the wire feeding wheels 31 through the first transmission shaft 322, and then transmitted to the other wire feeding wheel 31 through the meshing gears. Due to the precise clamping of the guide part 311 and the synchronous rotation of the driving part 312, the wire can move toward the wire guide nozzle 113 under a stable thrust. Specifically, the circumferential surfaces of the two wire feeding wheels 31 are formed with circumferential guide grooves, and the wire is adapted to the guide grooves, which can further improve the stability of wire feeding.

[0042] According to one embodiment of the present invention, referring to Figure 4 , the axis of the driving motor 321 is perpendicular to the axis of the first transmission shaft 322 .

[0043] The axis of the driving motor 321 is arranged perpendicular to the axis of the first transmission shaft 322. Usually, a bevel gear, belt drive or other type of steering member 33 is required to convert the direction of movement, which helps save space and makes the entire wire feeding system more compact.

[0044] In some specific examples, the driving motor 321 is connected to the first transmission shaft 322 through a steering member 33. The steering member 33 includes: a second transmission shaft 331, a first bevel gear 332, and a second bevel gear 333. The second transmission shaft 331 is rotatably mounted on the frame 111. The axis of the second transmission shaft 331 is perpendicular to the axis of the first transmission shaft 322. The first bevel gear 332 is disposed on the second transmission shaft 331, and the second bevel gear 333 is disposed on the first transmission shaft 322. The first bevel gear 332 and the second bevel gear 333 are meshed with each other. The output end of the driving motor 321 is connected to the input end of the second transmission shaft 331 by power coupling. When the driving motor 321 is started, the rotational power it generates is first transmitted to the second transmission shaft 331. Due to the meshing action of the first bevel gear 332 and the second bevel gear 333, the rotational motion of the second transmission shaft 331 is effectively converted into the rotational motion of the first transmission shaft 322, thereby driving the wire feeding wheel 31 connected to the first transmission shaft 322 to rotate, which not only maintains the high efficiency of power transmission, but also ensures the accuracy and stability of movement.

[0045] In another example, the second transmission shaft 331 includes a first shaft section and a second shaft section connected to each other, the axes of the first shaft section and the second shaft section are located on the same straight line, and the diameter of the first shaft section is greater than the diameter of the second shaft section. Specifically, the output end of the drive motor 321 is connected to one end of the first shaft section by power coupling, one end of the second shaft section is fixedly connected to the other end of the first shaft section, the first bevel gear 332 is provided on the second shaft section, and the first bevel gear 332 is adjacent to the first transmission shaft 322. One end of the first shaft section has a keyway, the output end of the drive motor 321 is connected to the keyway by a spline, and the length of the output end of the drive motor 321 in the keyway is less than the groove depth of the keyway, so that there is a clearance between the output end of the drive motor 321 and the groove wall of the keyway close to the second shaft section. The second shaft section is provided with a load bearing and the load bearing is stopped against the other end of the first shaft section.

[0046] When wire blockage occurs and the resistance is large, the load bearing will be slightly deformed. At this time, the clearance absorbs the deformation of the load bearing to prevent the wire blockage resistance from directly acting on the output end of the drive motor 321.

[0047] According to one embodiment of the present invention, the spindle sleeve of the additive manufacturing welding tool 20 is provided with a Hall sensor, and the handle of the additive manufacturing welding tool 20 is provided with a magnetic block, and the position of the magnetic block is consistent with the position of the additive manufacturing welding tool 20 cutting the welding wire. When the Hall sensor senses the magnetic block, the wire feeding stops; when the Hall sensor is away from the magnetic block, the wire feeding starts. The Hall sensor can also be replaced with a proximity sensor, a position sensor, etc. to achieve this function.

[0048] The present invention provides a first bracket 12 suitable for elastic deformation in the vertical direction. When not subjected to external force, the first bracket 12 remains in its natural state, i.e., a fixed shape; when wire blocking occurs, when the wire moves on the first bracket 12, the first bracket 12 can deform adaptively, i.e., the first bracket 12 can deform upward or downward to absorb deformation resistance and reduce wire stress at the same time; when the wire is normally fed, the first bracket 12 can deform and recover to facilitate the next stress absorption. It should be noted that the elastic deformation of the first bracket 12 occurs within the elastic range of its material. In addition, the wire feeding nozzle 13 is suitable for rotating in the horizontal direction and can change adaptively, i.e., as the wire is fed, the wire feeding nozzle 13 can rotate with the horizontal axis as the rotation axis, so that one end of the wire feeding nozzle 13 outputting the wire is close to or away from the additive manufacturing welding tool 20 to avoid wire blocking. Therefore, even if the additive manufacturing welding tool 20 cuts the wire intermittently, the wire feeding mechanism 10 of the present invention can deform adaptively to prevent wire blocking and improve the smoothness of wire feeding.

[0049] According to another aspect of the present invention, referring to Figure 5 The present invention proposes a control method for a friction stir additive manufacturing device, the control method comprising the following steps:

[0050] S1. Feed the wire into the wire feeding tube 112, so that one end of the wire is clamped between the two wire feeding wheels 31, and extends between the two wire feeding wheels 31 to the wire guide nozzle 113, and then fed from the wire guide nozzle 113 to the wire feeding nozzle 13. The two wire feeding wheels 31 need to have moderate clamping force on the wire, ensuring that the wire is not flattened or damaged, and ensuring sufficient friction to push the wire forward.

[0051] S2, start the drive motor 321, make it rotate at a predetermined speed, and then drive the wire feeding wheel 31 to rotate, and continuously feed the wire into the wire feeding nozzle 13 through the transmission mechanism 30, and the position of the wire feeding nozzle 13 changes adaptively. The speed of the drive motor 321 needs to be precisely controlled to maintain the continuity and consistency of wire feeding. Too fast speed may cause wire breakage or accumulation, and too slow speed may affect manufacturing efficiency.

[0052] S3. The wire feeding nozzle 13 further feeds the wire to the main shaft of the additive manufacturing welding tool 20 to realize the wire feeding process.

[0053] Through the detailed steps of the control method, the present invention ensures that the stir friction additive manufacturing device can achieve efficient and accurate wire feeding during use. This automated wire feeding system not only improves production efficiency, but also improves the quality and reliability of the final product.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0055] Although the 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A friction stir additive manufacturing device, characterized in that: include: A wire feeding mechanism (10) and an additive manufacturing welding tool (20); The wire feeding mechanism (10) comprises: A wire feeder (11), wherein the wire feeder (11) is suitable for driving a wire material to feed the additive manufacturing welding tool (20); A first bracket (12), the first bracket (12) being located at the rear end of the wire feeder (11), and the first bracket (12) being suitable for elastic deformation in the vertical direction; A wire feeding nozzle (13), the wire feeding nozzle (13) is located at the rear end of the first bracket (12), and the wire feeding nozzle (13) is suitable for rotating in the horizontal direction, one end of the wire feeding nozzle (13) extends obliquely toward the main axis of the additive manufacturing welding tool (20), and the aperture of the inlet (131) of the wire feeding nozzle (13) is larger than the aperture of the outlet (132) of the wire feeding nozzle (13).

2. The friction stir additive manufacturing equipment according to claim 1, characterized in that: The wire feeding mechanism (10) further comprises: A second bracket (14), wherein the second bracket (14) is connected to the first bracket (12), and the wire feeding nozzle (13) is rotatably connected to the first bracket (12) via the second bracket (14).

3. The friction stir additive manufacturing device according to claim 2, characterized in that: A vertical sliding groove (141) is provided in the first bracket (12), and the second bracket (14) is slidably installed in the sliding groove (141).

4. The friction stir additive manufacturing device according to claim 3, characterized in that: The second bracket (14) comprises: a rotating portion (142), wherein at least a portion of the second bracket (14) extends out of the sliding groove (141) to form the rotating portion (142); A wire feeding portion (143), wherein the wire feeding nozzle (13) is installed on the wire feeding portion (143), and the wire feeding portion (143) is rotatably connected to the rotating portion (142) along the horizontal direction, wherein a side of the rotating portion (142) facing the wire feeding nozzle (13) is an arc surface, and the wire feeding portion (143) is provided with a rotating groove (144) matching the shape of the arc surface, so that the arc surface fits in the rotating groove (144).

5. The friction stir additive manufacturing equipment according to claim 1, characterized in that: The wire feeding machine (11) comprises: A frame (111), the frame (111) being arranged on one side of the additive manufacturing welding tool (20); A wire feeding tube (112), wherein the wire feeding tube (112) is arranged on the frame (111); A wire guide nozzle (113), wherein the wire guide nozzle (113) is disposed on the frame (111) and is arranged opposite to the wire feeding tube (112); A transmission mechanism (30), wherein the transmission mechanism (30) is arranged on the frame (111) and is located between the wire feeding tube (112) and the wire guide nozzle (113), and the transmission mechanism (30) is used to transport the wire in the wire feeding tube (112) to the wire guide nozzle (113), and to transport the wire in the wire guide nozzle (113) to the wire feeding nozzle (13).

6. The friction stir additive manufacturing device according to claim 5, characterized in that: The transmission mechanism (30) comprises: Two wire feeding wheels (31), the two wire feeding wheels (31) are axially parallel, and the wire passes between the two wire feeding wheels (31), so that the wire feeding wheels (31) drive the wire to the wire guide nozzle (113); A driving member (32) is connected to the two wire feeding wheels (31) by power coupling to drive the wire feeding wheels (31) to rotate.

7. The friction stir additive manufacturing device according to claim 6, characterized in that: The driving member (32) comprises: A driving motor (321); A first transmission shaft (322), the first transmission shaft (322) is rotatably mounted on the frame (111), the input end of the first transmission shaft (322) is power-coupled with the output end of the drive motor (321), and the output end of the first transmission shaft (322) is fixedly connected to one of the wire feeding wheels (31).

8. The friction stir additive manufacturing device according to claim 7, characterized in that: The wire feeding wheel (31) comprises a guide portion (311) and a driving portion (312); the driving portion (312) is located at an end of the guide portion (311) away from the first transmission shaft (322); the guide portions (311) of the two wire feeding wheels (31) are suitable for clamping the wire material; and the driving portions (312) of the two wire feeding wheels (31) are configured as gears meshing with each other.

9. The friction stir additive manufacturing device according to claim 7, characterized in that: The driving motor (321) is connected to the first transmission shaft (322) via a steering member (33), and the steering member (33) comprises: a second transmission shaft (331), the second transmission shaft (331) being rotatably mounted on the frame (111), the axis of the second transmission shaft (331) being perpendicular to the axis of the first transmission shaft (322), the second transmission shaft (331) comprising a first shaft section and a second shaft section connected to each other, the diameter of the first shaft section being larger than the diameter of the second shaft section, one end of the first shaft section being provided with a keyway, the output end of the drive motor (321) being connected to the keyway via a spline, and the length of the output end of the drive motor (321) in the keyway being smaller than the depth of the keyway; A first bevel gear (332), wherein the first bevel gear (332) is arranged on the second shaft section; A second bevel gear (333), wherein the second bevel gear (333) is disposed on the first transmission shaft (322), and the first bevel gear (332) is meshed with the second bevel gear (333).

10. A control method for a friction stir additive manufacturing device, used to control the friction stir additive manufacturing device according to claim 7, characterized in that: The control method comprises the following steps: S1, feeding the wire into the wire feeding tube (112), so that one end of the wire is clamped between the two wire feeding wheels (31), and extends between the two wire feeding wheels (31) to the wire guide nozzle (113), and then fed from the wire guide nozzle (113) to the wire feeding nozzle (13); S2, starting the driving motor (321) to rotate at a predetermined speed, thereby driving the wire feeding wheel (31) to rotate, continuously feeding the wire into the wire feeding nozzle (13) through the transmission mechanism (30), and the position of the wire feeding nozzle (13) changes adaptively; S3. The wire feeding nozzle (13) further feeds the wire material to the main shaft of the additive manufacturing welding tool (20) to realize the wire feeding process.

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