A device and method for coaxial deposition stir friction additive manufacturing using side-axis rod feeding

Abstract

The present invention relates to a device and method for coaxial deposition stir friction additive manufacturing with a side-axis rod feeding, and belongs to the field of additive manufacturing technology. The device comprises an additive mechanism, a rod feeding mechanism, a loading mechanism, and a support mechanism, wherein the rod feeding mechanism and the loading mechanism are both connected to the additive mechanism via the support mechanism. The side-axis continuous rod feeding device of the present invention can realize side-axis continuous feeding of rods and synchronous coaxial deposition solid-phase additive manufacturing, reducing the large axial force required for conventional coaxial rod feeding stir friction additive manufacturing, and solving the problem that coaxial rod feeding additive manufacturing is difficult to achieve continuous material feeding.

Description

Technical Field

[0001] The present invention relates to an additive manufacturing device and method, and belongs to the technical field of additive manufacturing. Background Art

[0002] Friction stir additive manufacturing technology, as a solid-phase additive manufacturing method involving low temperature and large plastic deformation, can avoid defects such as pores, cracks, and element burnout produced during the melting process of traditional melting additive manufacturing methods. It has the advantages of fine grain structure, dispersed distribution of precipitated phase, dense interface bonding, low residual stress, controllable shape control, and high mechanical properties. It has great potential in the field of integrated manufacturing of integral structural parts of lightweight materials such as aluminum alloys and magnesium alloys.

[0003] At present, mainstream stir friction additive manufacturing technology can be divided into four categories according to the form of its raw materials: plate type, rod type, powder type and wire type. According to existing literature reports, the three modes of plate type, rod type and powder type have a wide range of applications. However, during the feeding and deposition process, there are problems such as difficulty in continuous feeding of materials, large forming width, low material utilization rate and large axial force of the required equipment, such as comparative documents CN105171229A and CN117161406A. Wire, as a material that can be bent and coiled, has successfully prepared a variety of aluminum alloy or magnesium alloy wires with good toughness and processed into coiled wire or barrel wire. It is an ideal material that can achieve continuous feeding and has the conditions for realizing continuous additive manufacturing of large components. For example, CN115647569A, CN115502544A and other published patents have been published. However, there are still some unresolved problems in wire-type stir friction additive manufacturing technology: First, materials with poor plasticity are difficult to prepare into corresponding wires through deformation, which limits the application scope of stir friction solid-phase additive manufacturing; second, during the additive manufacturing process, the wire is easily softened by heat and deformed, resulting in poor feeding; third, the diameter of the wire is small, and the wire feeding rate must match the screw speed to achieve continuous shearing, resulting in a limited volume of material fed into the additive device per unit time, making it difficult to significantly improve the deposition efficiency.

[0004] Therefore, it is urgent to propose a device and method for coaxial deposition stir friction additive manufacturing with side-axis rod feeding to solve the above technical problems. Summary of the Invention

[0005] To address the above-mentioned issues, a device and method for coaxial deposition stir friction additive manufacturing with side-axis rod feeding are provided. A brief overview of the invention is provided below to provide a basic understanding of certain aspects of the invention. It should be understood that this overview is not an exhaustive overview of the invention. It is not intended to identify key or important parts of the invention, nor is it intended to limit the scope of the invention.

[0006] The technical solution of the present invention:

[0007] A side-axis rod-feeding coaxial deposition stir friction additive manufacturing device comprises an additive mechanism, a rod-feeding mechanism, a loading mechanism and a supporting mechanism. The rod-feeding mechanism and the loading mechanism are both connected to the additive mechanism via the supporting mechanism.

[0008] Preferably, the material adding mechanism comprises a screw and a sleeve, the screw is located in the sleeve, and the screw and the sleeve are coaxially arranged.

[0009] Preferably, the upper portion of the screw is a screw clamping portion, the lower side of the screw is processed with a spiral groove, and the bottom end of the screw is processed with a stirring pin;

[0010] The upper side of the sleeve is provided with a sleeve clamping portion, the lower end of the sleeve is the sleeve bottom surface, the side of the sleeve is processed with a feeding hole, the spiral groove of the screw is located in the sleeve, and the stirring needle extends from the lower end of the sleeve.

[0011] Preferably: the rod feeding mechanism includes a stepper motor, a rod feeding machine back plate, a motor gear, a rod feeding wheel gear, a rod feeding wheel, a limiting tube and a spring compression structure; the motor gear and the rod feeding wheel gear on one side are installed on the rod feeding machine back plate; the stepper motor is installed on the rod feeding machine back plate; the motor gear is connected to the output end of the stepper motor; the motor gear is meshed with the rod feeding wheel gear on one side; the rod feeding wheel gear on the other side is connected to the spring compression structure; the rod feeding wheel gears on both sides are meshed to form a rod feeding gear set; the rod feeding wheel gear is coaxially connected to the rod feeding wheel; the spring compression structure is connected to the rod feeding machine back plate; and limiting tubes are provided at the front and rear ends of the rod feeding machine back plate.

[0012] Preferably: the rod feeding mechanism further includes a bolt, the rod feeding wheel gear and the rod feeding wheel are connected by bolts, the two rod feeding wheels are correspondingly arranged, the two sets of rod feeding gear groups are arranged on both sides of the motor gear, and the two sets of rod feeding gear groups are provided with limiting tubes on both sides; the limiting tubes are arranged corresponding to the feeding holes;

[0013] The rod feeding mechanism also includes a limiting tube bracket, the limiting tube is provided with a bell mouth, the limiting tube is detachably connected to the rod feeding mechanism through the limiting tube bracket, and the position of the limiting tube corresponds to the position between the two rod feeding wheels;

[0014] A V-shaped groove matching the rod diameter is machined in the middle of the rod feeding wheel side. The taper angle should be 10 to 45 degrees, which can realize the automatic centering of the rod between the two rod feeding wheels. The side of the rod feeding wheel is laser-etched with a wheel side groove to increase the friction between the rod feeding wheel and the conveyed rod to prevent slipping during the feeding process.

[0015] The spring compression structure includes a compression frame, a spring, a compression nut and a slide rod. One end of the two compression frames is hinged, and the other end of the compression frame is provided with a U-shaped slide groove. A T-shaped slide rod is fixed on the back plate of the rod feeder. The vertical section of the slide rod is connected to the back plate of the rod feeder. A spring is mounted on the horizontal section of the slide rod. The end of the horizontal section of the slide rod is threadedly connected with a compression nut. The horizontal section of the slide rod is provided in the U-shaped slide groove of the compression frame. The U-shaped slide groove of the compression frame is located between the vertical section of the slide rod and the spring. The rod feeding wheel gear and the rod feeding wheel on the other side are connected to the middle part of the compression frame.

[0016] Preferably: the feeding mechanism includes a back plate, a V-groove, a cover plate, a bottom plate, a guide shaft, a top block, a cylinder, a photoelectric sensor and a limit hole. The cover plates are installed on both sides of the back plate, the bottom plate is installed at the lower part of the back plate, the V-groove and the cylinder are installed on the bottom plate, the guide shaft is installed on the front side of the bottom plate, and the photoelectric sensors and limit holes arranged front and back are installed on the rear side of the bottom plate. The output end of the cylinder is connected to the top block, the top block is slidably connected to the guide shaft, the end of the top block is matched with the V-groove, and the cylinder is electrically connected to the photoelectric sensor.

[0017] Preferably, the feeding mechanism further includes a guide shaft bracket and a cylinder rod, the cylinder is connected to the top block through the cylinder rod, and both ends of the guide shaft are connected to the bottom plate through the guide shaft bracket;

[0018] The photoelectric sensor includes a sensor bracket, a transmitter and a receiver. A sensor bracket mounting hole is processed on the base plate, and a light-through hole is processed on the back plate. The sensor bracket is M-shaped. A screw and a nut are provided on the middle vertical plate of the sensor bracket. The screw passes through the sensor bracket mounting hole. After adjusting the position, tighten the nuts on both sides of the screw to clamp the base plate to fix the sensor bracket. One side vertical plate of the sensor bracket is located on the left side of the light-through hole, and a receiver is installed on one side vertical plate of the sensor bracket. The other side vertical plate of the sensor bracket is located on the right side of the light-through hole, and a transmitter is installed on the other side vertical plate of the sensor bracket. The limit tube is set corresponding to the limit hole.

[0019] Preferably: the supporting mechanism includes a mounting plate, a dynamic shoulder tool holder, a static shoulder bracket, a static shoulder bracket end cover, a first rod feeder bracket, a second rod feeder bracket, a third rod feeder bracket, a channel steel beam, an aluminum profile bracket and a pull rod, the screw clamping portion of the screw is connected to the dynamic shoulder tool holder, the sleeve clamping portion of the sleeve is located between the static shoulder bracket and the static shoulder bracket end cover, the dynamic shoulder tool holder is coaxially connected to the mounting plates and the static shoulder bracket on the upper and lower sides, the mounting plate and the static shoulder bracket are relatively fixed, the front end of the rod feeder back plate is connected to the third rod feeder bracket by bolts, the two second rod feeder brackets are symmetrically arranged on the outside of the third rod feeder bracket, the upper end of the second rod feeder bracket is connected to the corresponding first rod feeder bracket, the rear end of the first rod feeder bracket is fixedly connected to the mounting plate, and the first rod feeder bracket is processed The first rectangular hole, two parallel second rectangular mounting holes are processed on the second rod feeder bracket, a threaded hole is processed on the top of the second rod feeder bracket, and a third rectangular mounting hole is processed on the third rod feeder bracket. Adjust the third rod feeder bracket to a suitable position, pass the third bolt through the second rectangular mounting hole and the third rectangular mounting hole and tighten it with the third nut to fix the third rod feeder bracket and the second rod feeder bracket. The second bolt passes through the first rectangular hole and is connected to the threaded hole of the second rod feeder bracket to fix the second rod feeder bracket to the first rod feeder bracket. The channel steel beam is connected to the back plate of the feeding mechanism through several aluminum profile brackets. The rear part of the channel steel beam is rotatably connected to the first rod feeder bracket, and the two ends of the inclined pull rod are hinged to the middle part of the channel steel beam and the upper part of the mounting plate respectively.

[0020] Preferably: the pull rod includes a hinged seat, a pull rod arm and a connecting stud, both ends of the connecting stud are respectively threadedly connected to one end of the pull rod arm, and the other end of the pull rod arm is provided with a hinged seat, and the two hinged seats are respectively detachably connected to the channel steel beam and the mounting plate bolts.

[0021] A friction stir additive manufacturing method using a coaxial deposition with a side-axis rod feeding method comprises the following steps:

[0022] The rod feeding mechanism and the loading mechanism are adjusted to fit the additive mechanism through the support mechanism. When the additive mechanism moves horizontally or vertically, the relative positions remain unchanged, and the feeding is smooth.

[0023] The bars to be transported are arranged vertically in a single piece and discharged downward due to gravity as the current transported bars. The current transported bars are on the V-groove;

[0024] The photoelectric sensor detects the current conveying bar, controls the cylinder rod to retract, drives the top block to push the front end of the current conveying bar along the V groove through the limit hole into the limit tube on one side;

[0025] The front end of the currently conveyed bar enters between the bar feeding wheels, and the motor gear drives the bar feeding wheel gear and the bar feeding wheel on the other side to rotate through the bar feeding wheel gear on one side, so that the currently conveyed bar enters the limiting tube on the other side;

[0026] After the rear end of the current conveying bar leaves the photoelectric sensor, the photoelectric sensor controls the cylinder rod to extend and drive the ejector block to return. After the ejector block returns to its initial position, the bar to be conveyed falls into the V-groove under the action of gravity without being blocked by the ejector block. The photoelectric sensor detects the subsequent current conveying bar and continues to feed.

[0027] The front end of the current conveying rod enters the additive mechanism through the feeding hole, is cut and plasticized, and then flows out from the bottom of the sleeve to the substrate. The stirring needle smoothes the bottom surface of the stirring sleeve to complete the additive manufacturing.

[0028] The present invention has the following beneficial effects:

[0029] 1. The parallel rod feeding device of the present invention can achieve parallel continuous feeding of rods and synchronize coaxial deposition solid-phase additive manufacturing, reducing the large axial force required for traditional coaxial rod-feeding friction stir additive manufacturing and solving the problem of coaxial rod-feeding additive manufacturing having difficulty in achieving continuous material feeding.

[0030] 2. The rod material used in this invention has a larger diameter and higher rigidity, effectively avoiding the problem of reduced rigidity caused by softening and deformation of the additive material due to heat, and solving the problem of easy clogging of the feed port in traditional stir friction additive manufacturing methods;

[0031] 3. During the paraxial rod feeding process, the present invention can achieve the alternating feeding and deposition of reinforcement rods of different materials, different compositions, and different volume fractions, and can realize high-performance large-scale components with gradient changes in structure or alternating changes in strength and toughness;

[0032] 4. The rod raw material used in the present invention has a larger diameter. At the same feeding rate, the volume of raw material fed into the additive mechanism is larger and the resulting material particles are larger, which is conducive to enhancing heat generation and plastic flow inside the additive device and significantly improving deposition efficiency.

[0033] 5. The rod raw materials used in the present invention are from a wider range of sources, which not only reduces the processing cost, but is also applicable to alloy materials with poor plasticity that are difficult to process into wires, such as rare earth magnesium alloys and high volume fraction aluminum-based composite materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of a side-axis rod feeding coaxial deposition friction stir additive manufacturing device according to the present invention;

[0035] Figure 2 This is a partial schematic diagram of a side-axis rod feeding coaxial deposition friction stir additive manufacturing device according to the present invention;

[0036] Figure 3 is a schematic cross-sectional view of the material adding mechanism of the present invention;

[0037] Figure 4 2 is a schematic structural diagram of the rod feeding mechanism of the present invention;

[0038] Figure 5 It is a structural schematic diagram of the feeding structure of the present invention;

[0039] Figure 6 It is a partial left side view of the feeding mechanism of the present invention;

[0040] Figure 7 This is a partial enlarged view of the position of the photoelectric sensor in the feeding mechanism of the present invention;

[0041] Figure 8 It is a structural schematic diagram of the support mechanism described in the present invention.

[0042] In the figure: 1- material adding mechanism, 2- rod feeding mechanism, 3- loading mechanism, 4- supporting mechanism, 10- currently conveyed rod, 100- rod to be conveyed, 11- screw, 110- stirring needle, 111- spiral groove, 112- screw clamping part, 12- sleeve, 120- feeding hole, 121- bottom surface of sleeve, 122- sleeve clamping part, 20- stepping motor, 21- rod feeding machine back plate, 22- motor gear, 23- rod feeding wheel gear, 24- rod feeding wheel, 240- assembly bolt, 241- V-shaped groove, 242- wheel side groove, 25- limiting tube, 250- bell mouth, 251- limiting tube bracket, 26- spring clamping structure, 260- clamping frame, 261- spring, 262- clamping nut, 263- slide rod , 264-U-shaped slide, 30-back plate, 300-sensor bracket mounting hole, 301-light hole, 31-V groove, 32-cover plate, 33-bottom plate, 34-guide shaft, 340-guide shaft bracket, 35-top block, 36-cylinder, 360-cylinder rod, 37-photoelectric sensor, 370-sensor bracket, 371-transmitter, 372-receiver, 38-limiting hole, 40-mounting plate, 41-dynamic shaft shoulder shank, 42-static shaft shoulder bracket, 43-static shaft shoulder bracket end cover, 44-first rod feeder bracket, 45-second rod feeder bracket, 46-third rod feeder bracket, 47-channel steel beam, 48-aluminum profile bracket, 49-pull rod, 490-articulated seat, 491-pull rod arm, 492-connecting stud. DETAILED DESCRIPTION

[0043] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is described below using specific implementation examples illustrated in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessary confusion about the concepts of the present invention.

[0044] Specific implementation method 1: Combination Figure 1-8 This embodiment is described. This embodiment is a coaxial deposition stir friction additive manufacturing device with a side-axis rod feeding, comprising an additive mechanism 1, a rod feeding mechanism 2, a loading mechanism 3, and a support mechanism 4. The rod feeding mechanism 2 and the loading mechanism 3 are both connected to the additive mechanism 1 via the support mechanism 4. The loading mechanism 3 is responsible for storing rods and continuously feeding out single rods in sequence. The rod feeding mechanism 2 is responsible for receiving the rods fed by the loading mechanism 3 and transporting the rods to the additive mechanism 1. The additive mechanism 1 is responsible for cutting the rods into small particles, feeding them to the bottom along the spiral groove, and forming a dense deposition layer under the action of the stirring needle and the bottom surface of the sleeve.

[0045] The additive mechanism 1 includes a screw 11 and a sleeve 12. The screw 11 is located within the sleeve 12 and is coaxially arranged with the sleeve 12. The sleeve 12 is a hollow structure. Its inner wall and the spiral groove 111 of the screw form a spiral cavity. A feeding hole 120 is provided on the side wall to communicate with the cavity for feeding a rod (currently conveying a rod 10) into the cavity.

[0046] The upper portion of the screw 11 is a screw clamping portion 112, the lower side of the screw 11 is processed with a spiral groove 111, and the bottom end of the screw 11 is processed with a stirring pin 110;

[0047] The upper side of the sleeve 12 has a sleeve clamping portion 122, the lower end of the sleeve 12 is a sleeve bottom surface 121, the side of the sleeve 12 is processed with a feeding hole 120, the spiral groove 111 of the screw 11 is located in the sleeve 12, and the stirring needle 110 extends from the lower end of the sleeve 12;

[0048] That is, during the additive test, the screw 11 rotates at high speed, and the stirring pin 110 at the bottom penetrates into the substrate. After reaching a predetermined depth, the stepper motor 20 of the rod feeding mechanism 2 is started, and the rod 10 is fed into the additive mechanism 1 through the feeding hole 120. The rod 10 is sheared into block-shaped particles by the screw 11 and transported along the spiral groove 111 to the bottom of the mechanism for extrusion. The particles are mixed with the substrate material by the stirring action of the stirring pin 110, and form a dense deposition layer under the forging action of the sleeve bottom surface 121.

[0049] The rod feeding mechanism 2 includes a stepping motor 20, a rod feeding machine back plate 21, a motor gear 22, a rod feeding wheel gear 23, a rod feeding wheel 24, a limiting tube 25 and a spring pressing structure 26. The motor gear 22 and the rod feeding wheel gear 23 on one side are installed on the rod feeding machine back plate 21 through a rotating shaft. The stepping motor 20 is installed on the rod feeding machine back plate 21 by bolts. The motor gear 22 is connected to the output end of the stepping motor 20, and the motor gear 22 is meshed with the rod feeding wheel gear 23 on one side. The rod feeding wheel gear 23 on the other side is connected to the spring pressing structure 26 through a rotating shaft. The rod feeding wheel gears 23 on the left and right sides are meshed to form a rod feeding gear set. Each rod feeding wheel gear 23 is coaxially connected to a rod feeding wheel 24. The spring pressing structure 26 is connected to the rod feeding machine back plate 21. Limiting tubes 25 are provided at the front and rear ends of the rod feeding machine back plate 21.

[0050] The rod feeding mechanism 2 further includes a bolt 240, through which the rod feeding wheel gear 23 is connected to the rod feeding wheel 24. The two rod feeding wheels 24 arranged on the left and right are arranged correspondingly. The two rod feeding gear groups are symmetrically arranged on the front and rear sides of the motor gear 22. The two rod feeding gear groups are provided with limit tubes 25 on the front and rear sides. The limit tube 25 on the output side is correspondingly arranged and connected to the feeding hole 120.

[0051] The rod feeding mechanism 2 further includes a limiting tube bracket 251. The input end of the limiting tube 25 is provided with a bell mouth 250 to facilitate feeding. The limiting tube 25 is inserted into the through hole of the limiting tube bracket 251 and is detachably connected to the rod feeding mechanism 2 by being tightened with screws. The limiting tube bracket 251 is welded to the rod feeding mechanism 2. The limiting tube 25 is provided at a position corresponding to the two corresponding rod feeding wheels 24 on the left and right.

[0052] The rod feeding wheels 24 are machined with V-shaped grooves 241 on their sides to achieve automatic centering of the rods between the two rod feeding wheels 24. The rod feeding wheels 24 are laser-etched with side grooves 242 to increase the friction between the rod feeding wheels 24 and the rods 10, preventing slippage during the feeding process.

[0053] The spring compression structure 26 includes a compression frame 260, a spring 261, a compression nut 262 and a slide bar 263. One end of the two compression frames 260 is hinged to each other, and the other end of the compression frame 260 is provided with a U-shaped slide 264. A T-shaped slide bar 263 is fixed on the back plate 21 of the rod feeder. The vertical section of the slide bar 263 is connected to the back plate 21 of the rod feeder. The horizontal section of the slide bar 263 is sleeved with a spring 261. The end of the horizontal section of the slide bar 263 is threadedly connected to a compression nut. The horizontal section of the slide bar 263 is provided in the U-shaped slide groove of the pressing frame 260, and the U-shaped slide groove of the pressing frame 260 is located between the vertical section of the slide bar 263 and the spring 261. The rod feeding wheel gear 23 and the rod feeding wheel 24 on the other side are connected to the middle part of the pressing frame 260 through a rotating shaft. By rotating the pressing nut 262, the force of the spring 261 on the pressing frame 260 is changed, thereby achieving pressure adjustment, which has good applicability.

[0054] That is, the stepping motor 20 in the rod feeding mechanism 2 is connected to the motor gear 22 through a flat key, and the motor gear 22 is meshed with the rod feeding wheel gear 23. Figure 4 The upper and lower rod feeding wheel gears 23 mesh with each other, and the rod feeding wheel 24 is mounted on the rod feeding wheel gear 23 via bolts 240. This allows the stepping motor 20 to drive the rod feeding wheels 24 on both sides to rotate synchronously. V-shaped grooves 241 are machined on the rod feeding wheels 24 to achieve automatic centering of the rods. The working surfaces of the rod feeding wheels are machined with side grooves to increase friction and prevent slipping during the rod feeding process. The spacing between the rod feeding wheels 24 on both sides is adjusted by a spring compression structure 26 to ensure that the rod feeding wheels 24 have sufficient clamping force on the rods 10. Limiting tubes 25 are respectively installed at the front and rear ends of the rod feeding mechanism to prevent the rods from deviating from the predetermined trajectory after deformation.

[0055] The feeding mechanism 3 includes a back plate 30, a V-groove 31, a cover plate 32, a bottom plate 33, a guide shaft 34, a top block 35, a cylinder 36, a photoelectric sensor 37 and a limit hole 38. The cover plates 32 are installed on both sides of the back plate 30, and the bottom plate 33 is installed at the bottom of the back plate 30. The bars 100 to be transported are stacked in the gap between the back plate 30 and the cover plate 32. A V-groove 31 is provided below the gap between the back plate 30 and the cover plate 32. The distance between the V-groove 31 and the cover plate 32 can accommodate a current transport bar 10 to pass through. After the current transport bar 10 is transported out, the bar to be transported at the bottom under the action of gravity 100 falls into the V-groove 31 as the subsequent current conveying bar 10, the V-groove 31 and the cylinder 36 are installed on the bottom plate 33, the front side of the bottom plate 33 is installed with a guide shaft 34, and the rear side of the bottom plate 33 is installed with a photoelectric sensor 37 and a limit hole 38 arranged in front and back. The photoelectric sensor 37 is located on the side of the current conveying bar 10, and the limit hole 38 is located at the front end of the feeding mechanism 3. The output end of the cylinder 36 is connected to the top block 35, and the top block 35 is slidably connected to the guide shaft 34. The end of the top block 35 is matched with the current conveying bar 10 on the V-groove 31, and the cylinder 36 is electrically connected to the photoelectric sensor 37;

[0056] The feeding mechanism 3 further includes a guide shaft bracket 340 and a cylinder rod 360. The cylinder 36 is connected to the top block 35 via the cylinder rod 360. Both ends of the guide shaft 34 are connected to the bottom plate 33 via the guide shaft bracket 340.

[0057] The photoelectric sensor 37 includes a sensor bracket 370, a transmitter 371 and a receiver 372. A keyway-shaped sensor bracket mounting hole 300 is processed on the bottom plate 33, and a light hole 301 is processed on the back plate 30 corresponding to the current conveying rod 10. The sensor bracket 370 is m-shaped. A screw and a nut are set on the middle vertical plate of the sensor bracket 370. The screw passes through the sensor bracket mounting hole 300. After adjusting the position, tighten the nuts on both sides of the screw to clamp the bottom plate 33, so that the sensor bracket 370 is fixed, one side vertical plate of the sensor bracket 370 is located on the left side of the light hole 301 and the V-groove 31, and a receiver 372 is installed on one side vertical plate of the sensor bracket 370. The other side vertical plate of the sensor bracket 370 is located on the right side of the light hole 301 and the V-groove 31, and a transmitter 371 is installed on the other side vertical plate of the sensor bracket 370. The light hole 301 avoids blocking the transmitter 371 and the receiver 372; the position of the limiting tube 25 on the input side corresponds to the position of the limiting hole 38;

[0058] That is, during the feeding process, the rod material falls from the hopper into the V-groove 31, blocking the light hole 301 at the end of the mechanism. The photoelectric sensor 37 cannot receive the light signal and sends a signal to the cylinder 36 to retract it, thereby controlling the ejector block 35 to eject the single rod 10. When the ejector block 35 moves to the limit position of the guide shaft bracket 340, it cannot move further. However, at this time, the rod 10 has been fed into the rod feeding mechanism 2 and is clamped by the rod feeding wheel 24 and continues to be transported. The stationary ejector block 35 and the rod 10 being transported jointly support the remaining rods 100. When the rod 10 being transported passes through the light hole 301, the photoelectric sensor 37 senses light and sends a signal to the cylinder 36 to eject it, thereby controlling the ejector block 35 to move to the bottom range of the discharge bin. At this time, the rod 10 being transported also just moves to the bottom range of the discharge bin, and the remaining rods 100 in the bin fall, blocking the light hole 301 again, and controlling the cylinder to retract again to eject the single rod, thereby realizing continuous feeding.

[0059] That is, the material bin of the feeding mechanism 3 is surrounded by a back plate 30 and a cover plate 32, which can arrange the bars in a single row in the vertical direction and discharge them downward due to gravity; the V groove 31 is installed on the back plate 30 and keeps Figure 7 The illustrated mounting relationship ensures that after a single bar 10 is loaded into the V-groove 31, there's insufficient space on the side for the remaining bars 100 to fall. Cylinder 36 is connected to ejector block 35 via cylinder rod 360, and is limited by guide shaft 34, allowing the ejector block to move between two guide shaft brackets 340. The ejection and retraction of cylinder rod 360 are controlled by photoelectric sensor 37, whose position is adjustable through backplate sensor bracket mounting hole 300. Receiver 372 detects light when it's ejected, and desensitizes light when it's retracted. A limit hole 38 is provided at the end of the loading mechanism to constrain the bar's trajectory.

[0060] The support mechanism 4 includes a mounting plate 40, a dynamic shoulder tool holder 41, a static shoulder bracket 42, a static shoulder bracket end cover 43, a first rod feeder bracket 44, a second rod feeder bracket 45, a third rod feeder bracket 46, a channel steel beam 47, an aluminum profile bracket 48 and a pull rod 49. The screw clamping portion 112 of the screw 11 is connected to the dynamic shoulder tool holder 41, and the sleeve clamping portion 122 of the sleeve 12 is clamped and fixed between the static shoulder bracket 42 and the static shoulder bracket end cover 43. The dynamic shoulder tool holder 41 is connected to the mounting plates 40 and the static shoulder bracket 42 on the upper and lower sides. The coaxial rotation connection is provided, the mounting plate 40 is relatively fixed to the static shoulder bracket 42, the front end of the rod feeder back plate 21 is provided with two third rod feeder brackets 46, and the two second rod feeder brackets 45 are symmetrically arranged on the outside of the two third rod feeder brackets 46. The upper end of the second rod feeder bracket 45 is connected to the corresponding horizontally arranged first rod feeder bracket 44, and the rear end of the first rod feeder bracket 44 is provided with a mounting plate. The rear end of the first rod feeder bracket 44 is fixedly connected to the mounting plate 40, and the first rectangular hole is processed on the first rod feeder bracket 44. The vertical third The second rod feeder bracket 45 is processed with two parallel second rectangular mounting holes, the top of the second rod feeder bracket 45 is processed with a threaded hole, and the third rod feeder bracket 46 is processed with a third rectangular mounting hole. The third rod feeder bracket 46 is adjusted to a suitable position, and the third bolt is passed through the second rectangular mounting hole and the third rectangular mounting hole and then tightened with the third nut to fix the third rod feeder bracket 46 and the second rod feeder bracket 45. The second bolt is passed through the first rectangular hole and connected to the threaded hole of the second rod feeder bracket 45, so that the second rod feeder bracket 45 is fixed to the first rod feeder bracket 44 and can be adjusted in various horizontal, vertical and tilt angles. The channel steel crossbeam 47 is connected to the back plate 30 of the feeding mechanism 3 through a number of aluminum profile brackets 48. The rear portion of the channel steel crossbeam 47 is rotatably connected to the mounting plate at the rear end of the first rod feeder bracket 44. The mounting plate is provided with an arc-shaped slide groove. The rear end of the channel steel crossbeam 47 is provided with a cylindrical slider, which is arranged in the arc-shaped slide groove. The two ends of the inclined pull rod 49 are respectively hinged to the middle portion of the channel steel crossbeam 47 and the upper portion of the mounting plate 40;

[0061] The pull rod 49 includes an articulated seat 490, a pull rod arm 491 and a connecting stud 492. The two ends of the connecting stud 492 are respectively threadedly connected to one end of different pull rod arms 491. The other end of the pull rod arm 491 is provided with an articulated seat 490. The two articulated seats 490 are respectively detachably connected to the channel steel beam 47 and the mounting plate 40 with bolts. By rotating the connecting stud 492, the overall length of the pull rod 49 is adjusted, thereby adjusting the feeding angle. At the same time, the angle is limited under the limiting action of the arc chute to prevent the risk of falling when the pull rod fails, thereby ensuring personnel safety and simple and convenient operation.

[0062] That is, the screw 11 and sleeve 12 in the material adding mechanism 1 are respectively installed on the friction stir welding machine through the dynamic shoulder 41 and the static shoulder bracket 42 of the support mechanism 4, and maintain good coaxiality; the rod feeding mechanism 2 is installed on the static shoulder bracket 40 through the rod feeding machine brackets 44-46, and the installation height and angle can be adjusted by bolts; the feeding mechanism 43 is installed on the channel steel beam 47 and the aluminum profile bracket 48, and the installation height and angle can be adjusted by the pull rod 49;

[0063] The present invention solves the problems of the existing stir friction additive manufacturing technology, such as difficult continuous material feeding, low deposition efficiency, and narrow material applicability. It also takes into account the technical advantages of continuous material feeding, high deposition efficiency, and wide material applicability, and has important engineering application value.

[0064] Specific implementation method 2: Combination Figure 1-8 The embodiment of the present invention is described. The embodiment of the present invention is a side-axis rod feeding coaxial deposition stir friction additive manufacturing method, which adopts the side-axis rod feeding coaxial deposition stir friction additive manufacturing device, including an additive mechanism, a rod feeding mechanism, a loading mechanism and a supporting mechanism. The additive mechanism mainly includes a screw and a sleeve. The screw can rotate around its own axis, a spiral groove is provided on the side, and a stirring needle is provided on the bottom surface; the sleeve is a hollow structure, and its inner wall and the spiral groove of the screw form a spiral cavity, and a feeding hole is provided on the side wall to feed the rod into the cavity; the rod feeding mechanism adopts a stepping motor to control the synchronous rotation of the rod feeding wheels on both sides through gear transmission, and adopts a spring compression structure to control the spacing between the rod feeding wheels on both sides. The clamping and conveying rods can stably convey the rods into the sleeve feeding hole; the feeding mechanism adopts a "magazine" structure, and the rods fall from the hopper into the V-groove below, blocking the light hole of the photoelectric sensor near the discharge port. The sensor sends a signal to drive the cylinder to retract and eject a single rod. The rod moves into the rod feeding wheel, and is then clamped by the rod feeding wheel and continued to be conveyed; when the bar moves out of the hopper range, the photoelectric sensor senses light and sends a signal to the cylinder, driving the cylinder to push the ejector block out of the hopper range, and the next bar falls, thus realizing continuous feeding; the support mechanism plays the role of installation and support, and can install other mechanisms on the friction stir welding machine, and adjust the feeding angle of the rod by the pull rod;

[0065] During the additive process, the rod material falls from the hopper in the loading mechanism into the V-groove and is fed into the rod feeding mechanism by the cylinder-driven ejector. It is then clamped by the rod feeding wheel and enters the additive mechanism through the sleeve feeding hole. It is cut into block-shaped pellets by the spiral groove of the rotating screw and moves along the spiral cavity to the bottom of the screw. During transportation, the pellets are deformed and heated by the compression and friction between the screw and the barrel wall, causing plasticization. Finally, the plasticized material is extruded through the gap between the screw and the bottom of the sleeve, mixed with the substrate or the previous layer of material by the action of the stirring pin, and formed into a dense deposition layer by the forging action of the sleeve bottom.

[0066] The method comprises the following steps:

[0067] Step 1: Based on the different materials, dimensions, and performance requirements of the additive component, select a rod material of appropriate diameter and design the dimensions of the screw 11 and sleeve 12 to ensure that the rod can enter the spiral cavity through the feed hole 120 and be sheared into particles of appropriate size through the relative rotation of the sleeve 12 and screw 11;

[0068] The rod material can be magnesium alloy, aluminum alloy, copper alloy, etc. The rod diameter is 3 to 8 mm and the length is 200 to 4000 mm;

[0069] The diameter of the screw is 4-40 mm, the length of the stirring needle is 0.3-5 mm, the depth of the screw groove is 1-5 mm, and the pitch is 10-30 mm;

[0070] The number of screw grooves can be 1 to 3, and increasing the number of grooves can improve the shearing efficiency of the screw. The number of stirring pins at the bottom of the screw can be 1 to 3, and increasing the number can improve the mixing degree of the deposition material and the substrate.

[0071] Step 2: Install the screw clamping portion 112 of the screw 11 onto the dynamic shoulder shank 41 of the friction stir welding machine, and install the sleeve 12 onto the static shoulder bracket 42. By adjusting the installation positions of the two, ensure that there is a certain gap between the inner wall of the sleeve 12 and the side wall of the screw 11 to prevent contact and wear during rotation; In addition, the bottom surface 121 of the sleeve should be at the same level as the bottom surface of the screw 11, and the stirring pin 110 should be fully extended to ensure that the stirring pin fully acts on the extruded material, which is conducive to strengthening the metallurgical bonding between the layers;

[0072] Step 3: Select a suitable rod feeding wheel according to the size of the rod, and adjust the gap between the upper and lower rod feeding wheels 24 (feeding wheels) through the spring compression structure 26 to prevent the rod from slipping during the feeding process; install and debug the rod feeding mechanism 2 so that it can operate normally, adjust the distance and inclination angle between the rod feeding mechanism and the welding machine spindle, so that the rod passes through the rod feeding wheel and the limiting tube and reaches the feeding hole of the sleeve in a straight line, and insert the limiting tube into the feeding hole of the sleeve;

[0073] The rod feeding wheel in the rod feeding mechanism adopts a "V"-shaped design, which can realize the automatic centering of the rod. The cone angle should be 10 to 45 degrees. Small grooves are etched on the contact surface between the rod feeding wheel and the rod to increase the friction coefficient between the two and avoid slipping during the feeding process.

[0074] Step 4: Install and debug the feeding mechanism 3 so that the bars can fall from the hopper into the V-groove 241. Adjust the position of the photoelectric sensor 37 so that the moment the sensor controls the cylinder 36 to eject coincides with the moment the bars are completely conveyed out of the hopper, allowing the next bar to fall smoothly. Install the feeding mechanism 3 on the bracket, keeping its tilt angle the same as that of the rod feeding mechanism 2 and maintaining a certain installation height so that the bars in the V-groove 241 can pass through the limiting hole 38 and enter the limiting tube 25 of the rod feeder.

[0075] In order to prevent the device and the workpiece from interfering in the height direction during the additive process, the rod feeding mechanism 2 and the loading mechanism 3 are designed to adjust the rod feeding angle within a range of 0 to 30°.

[0076] The stroke of the cylinder 36 in the feeding mechanism 3 should be less than the length of the bar. The function of the cylinder 36 to drive the ejector block 35 to transport the bar is only to feed the bar into the bar feeding wheel, and then the bar feeding machine will continue to complete the transportation task. Therefore, the distance between the limit hole 38 and the bar feeding wheel 24 should be 50-400mm, and the stroke of the cylinder 36 should be 100-500mm.

[0077] The position of the photoelectric sensor in the feeding mechanism 3 can be adjusted by the sensor bracket. The distance between the sensor and the right wall of the silo should be 0-50 mm to ensure that the cylinder drives the top block to move synchronously with the bar being conveyed out of the silo range, so that the next bar can fall smoothly into the V groove and continue the feeding process;

[0078] Step 5: Design a reasonable additive path based on the shape of the additive component and select appropriate process parameters; install the substrate on the workpiece platform and clamp it with a tooling, set the coordinate origin, write the additive program, and prepare for additive manufacturing;

[0079] The speed range should be 50-3000rpm, the travel speed should be 50-2000mm / min, the layer height should be 0.2-6mm, the rod feeding rate should be 100-10000mm / min, and the deposition efficiency can reach 0.5-60kg / h;

[0080] Step 6: When performing additive manufacturing, the screw 11 first rotates at high speed, and the bottom stirring pin 110 penetrates into the substrate. After reaching a predetermined depth, the rod feeding mechanism 2 is started, and the rod enters the additive manufacturing mechanism through the feeding hole, is cut into block-shaped pellets by the screw, and is transported to the bottom of the device through the spiral cavity for extrusion; initially, the device generates less heat, and it is difficult to fully plasticize the material, and the pellets exist in granular form; as the volume of the extruded pellets increases, the gap between the bottom of the screw and the substrate is gradually filled, and the friction between the bottom of the screw and the pellets generates heat, causing the pellets to deform and gradually plasticize; at this time, the welding machine is started to feed, and the plasticized pellets are continuously extruded from the bottom of the device, mixed with the substrate material through the stirring action of the stirring pin, and deposited on the substrate; as the additive process proceeds, the temperature of the screw and the bottom of the sleeve 12 gradually increases, heat accumulation occurs, and the plasticization position of the pellets is advanced, occurring in the spiral cavity, and gradually reaching a steady state, so that the additive process proceeds stably;

[0081] Step 7: After the additive device has traversed the path of one layer and needs to proceed to the next layer, the screw 11 and sleeve 12 are lifted upward by a distance of the layer height and then continue to feed; at this time, the additive process continues stably on the previous deposition layer;

[0082] Step 8: When the material addition is finished, the screw 11 and the sleeve 12 are lifted upwards, and the feeding mechanism 3 and the rod feeding mechanism 2 are closed at the same time. The screw 11 is kept rotating until the remaining material in the spiral cavity is squeezed out, and then the rotation is stopped. Then, the additive component that meets the requirements is obtained.

[0083] The present invention can solve the problems of the existing friction stir additive manufacturing technology, such as difficult continuous material feeding, low deposition efficiency, and narrow material applicability, and can also realize the additive manufacturing of large magnesium alloy and aluminum alloy components with high efficiency and high quality.

[0084] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be permuted and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutations and combinations. Therefore, the present invention will no longer describe the technical solutions after permutations and combinations one by one, but it should be understood that the technical solutions after permutations and combinations have been disclosed by the present invention.

[0085] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A coaxial deposition friction stir additive manufacturing device with a side-axis rod feeding, characterized by: It includes an additive mechanism (1), a rod feeding mechanism (2), a loading mechanism (3) and a support mechanism (4), wherein the rod feeding mechanism (2) and the loading mechanism (3) are connected to the additive mechanism (1) via the support mechanism (4); The material adding mechanism (1) comprises a screw (11) and a sleeve (12), wherein the screw (11) is located in the sleeve (12), and the screw (11) and the sleeve (12) are coaxially arranged; The upper portion of the screw (11) is a screw clamping portion (112), the lower side surface of the screw (11) is processed with a spiral groove (111), and the bottom end of the screw (11) is processed with a stirring pin (110); The upper side of the sleeve (12) has a sleeve clamping portion (122), the lower end of the sleeve (12) is a sleeve bottom surface (121), the side of the sleeve (12) is processed with a feeding hole (120), the spiral groove (111) of the screw (11) is located in the sleeve (12), and the stirring needle (110) extends from the lower end of the sleeve (12); The support mechanism (4) includes a mounting plate (40), a dynamic shoulder tool holder (41), a static shoulder bracket (42), a static shoulder bracket end cover (43), a first rod feeder bracket (44), a second rod feeder bracket (45), a third rod feeder bracket (46), a channel steel beam (47), an aluminum profile bracket (48) and a pull rod (49), a screw clamping portion (112) of the screw (11) is connected to the dynamic shoulder tool holder (41), and a sleeve clamping portion (122) of the sleeve (12) is located between the static shoulder bracket (42) and the static shoulder bracket end cover (43), the movable shoulder tool holder (41) is coaxially connected to the mounting plates (40) and the static shoulder bracket (42) on the upper and lower sides, the mounting plate (40) and the static shoulder bracket (42) are relatively fixed, the front end of the rod feeder back plate (21) is connected to the third rod feeder bracket (46) by bolts, the two second rod feeder brackets (45) are symmetrically arranged on the outside of the third rod feeder bracket (46), the upper end of the second rod feeder bracket (45) is connected to the corresponding first rod feeder bracket (44), and the rear end of the first rod feeder bracket (44) is connected to the corresponding first rod feeder bracket (44). The first rod feeding machine bracket (44) is fixedly connected to the mounting plate (40), the first rectangular hole is processed on the first rod feeding machine bracket (44), the second rod feeding machine bracket (45) is processed with two parallel second rectangular mounting holes, the top of the second rod feeding machine bracket (45) is processed with a threaded hole, the third rod feeding machine bracket (46) is processed with a third rectangular mounting hole, the third rod feeding machine bracket (46) is adjusted to a suitable position, the third bolt is passed through the second rectangular mounting hole and the third rectangular mounting hole and then tightened with a third nut, so that the third rod feeding machine bracket (46) and the second rod feeding machine bracket (46) are in a fixed position. The rod feeding machine bracket (45) is fixed, and the second bolt passes through the first rectangular hole and is connected to the threaded hole of the second rod feeding machine bracket (45), so that the second rod feeding machine bracket (45) is fixed to the first rod feeding machine bracket (44), and the channel steel beam (47) is connected to the back plate (30) of the feeding mechanism (3) through a plurality of aluminum profile brackets (48). The rear part of the channel steel beam (47) is rotatably connected to the first rod feeding machine bracket (44), and the two ends of the inclined pull rod (49) are respectively hinged to the middle part of the channel steel beam (47) and the upper part of the mounting plate (40); The pull rod (49) includes an articulated seat (490), a pull rod arm (491) and a connecting stud (492), the two ends of the connecting stud (492) are respectively threadedly connected to one end of the pull rod arm (491), and the other end of the pull rod arm (491) is provided with an articulated seat (490), and the two articulated seats (490) are respectively detachably connected to the channel steel beam (47) and the mounting plate (40) by bolts.

2. The apparatus for coaxial deposition and friction stir additive manufacturing with a side-axis rod feeding method according to claim 1, characterized in that: The rod feeding mechanism (2) comprises a stepping motor (20), a rod feeding machine back plate (21), a motor gear (22), a rod feeding wheel gear (23), a rod feeding wheel (24), a limiting tube (25) and a spring pressing structure (26). The motor gear (22) and a rod feeding wheel gear (23) on one side are mounted on the rod feeding machine back plate (21). The stepping motor (20) is mounted on the rod feeding machine back plate (21). The motor gear (22) is connected to the output end of the stepping motor (20). The motor gear (22) is meshed with the rod feeding wheel gear (23) on one side. The rod feeding wheel gear (23) on the other side is connected to the spring pressing structure (26). The rod feeding wheel gears (23) on both sides are meshed to form a rod feeding gear set. The rod feeding wheel gear (23) is coaxially connected to the rod feeding wheel (24). The spring pressing structure (26) is connected to the rod feeding machine back plate (21). Limiting tubes (25) are provided at the front and rear ends of the rod feeding machine back plate (21).

3. The apparatus for coaxial deposition and friction stir additive manufacturing with a side-axis rod feeding method according to claim 2, characterized in that: The rod feeding mechanism (2) further includes a bolt (240), the rod feeding wheel gear (23) and the rod feeding wheel (24) are connected via the bolt (240), the two rod feeding wheels (24) are correspondingly arranged, the two rod feeding gear groups are arranged on both sides of the motor gear (22), and the two rod feeding gear groups are provided with a limiting tube (25) on both sides; the limiting tube (25) is arranged corresponding to the feeding hole (120); The rod feeding mechanism (2) further comprises a position limiting tube bracket (251), the position limiting tube (25) is provided with a bell mouth (250), the position limiting tube (25) is detachably connected to the rod feeding mechanism (2) via the position limiting tube bracket (251), and the position between the position limiting tube (25) and the two rod feeding wheels (24) is correspondingly arranged; a V-shaped groove (241) matching the diameter of the rod (10) is machined in the middle of the side surface of the rod feeding wheel (24), so as to realize automatic centering of the rod between the two rod feeding wheels (24); a laser-etched wheel side groove (242) is used on the side surface of the rod feeding wheel (24) to increase the friction between the rod feeding wheel (24) and the rod (10) to prevent slipping during the rod feeding process; The spring pressing structure (26) includes a pressing frame (260), a spring (261), a pressing nut (262) and a slide bar (263). One end of the two pressing frames (260) is hinged, and the other end of the pressing frame (260) is provided with a U-shaped slide groove (264). A T-shaped slide bar (263) is fixed on the back plate (21) of the rod feeding machine. The vertical section of the slide bar (263) is connected to the back plate (21) of the rod feeding machine. The water level of the slide bar (263) is The flat section is provided with a spring (261), the end of the horizontal section of the slide rod (263) is threadedly connected with a clamping nut (262), the horizontal section of the slide rod (263) is provided in the U-shaped chute of the compression frame (260), the U-shaped chute of the compression frame (260) is located between the vertical section of the slide rod (263) and the spring (261), and the rod feeding wheel gear (23) and the rod feeding wheel (24) on the other side are connected to the middle of the compression frame (260).

4. The apparatus for coaxial deposition and friction stir additive manufacturing with a side-axis rod feeding method according to claim 1, characterized in that: The feeding mechanism (3) comprises a back plate (30), a V-groove (31), a cover plate (32), a bottom plate (33), a guide shaft (34), a top block (35), a cylinder (36), a photoelectric sensor (37) and a limiting hole (38). The cover plates (32) are installed on both sides of the back plate (30), the bottom plate (33) is installed at the lower part of the back plate (30), the V-groove (31) and the cylinder (36) are installed on the bottom plate (33), the guide shaft (34) is installed on the front side of the bottom plate (33), and the photoelectric sensor (37) and the limiting hole (38) arranged in front and back are installed on the rear side of the bottom plate (33). The output end of the cylinder (36) is connected to the top block (35), the top block (35) is slidably connected to the guide shaft (34), the end of the top block (35) is matched with the V-groove (31), and the cylinder (36) is electrically connected to the photoelectric sensor (37).

5. The device for coaxial deposition and friction stir additive manufacturing with a side-axis rod feeding method according to claim 3, characterized in that: The feeding mechanism (3) further includes a guide shaft bracket (340) and a cylinder rod (360). The cylinder (36) is connected to the top block (35) through the cylinder rod (360). Both ends of the guide shaft (34) are connected to the bottom plate (33) through the guide shaft bracket (340). The photoelectric sensor (37) includes a sensor bracket (370), a transmitter (371) and a receiver (372). A sensor bracket mounting hole (300) is processed on the bottom plate (33), and a light-through hole (301) is processed on the back plate (30). The sensor bracket (370) is m-shaped. A screw and a nut are provided on the middle vertical plate of the sensor bracket (370). The screw passes through the sensor bracket mounting hole (300). After adjusting the position, the nuts on both sides of the screw are tightened to clamp the bottom plate (33) to fix the sensor bracket (370). One side vertical plate of the sensor bracket (370) is located on the left side of the light-through hole (301). A receiver (372) is installed on one side vertical plate of the sensor bracket (370). The other side vertical plate of the sensor bracket (370) is located on the right side of the light-through hole (301). A transmitter (371) is installed on the other side vertical plate of the sensor bracket (370). The limiting tube (25) is provided corresponding to the limiting hole (38).

6. A friction stir additive manufacturing method with coaxial deposition and side-axis rod feeding, characterized by: The device for coaxial deposition and friction stir additive manufacturing using a side-axis rod feeding device according to any one of claims 1 to 5 comprises the following steps: Adjusting the positions of the rod feeding mechanism (2) and the material loading mechanism (3) through the support mechanism (4) so ​​as to adapt them to the material adding mechanism (1); The bars (100) to be transported are arranged in a single piece in the vertical direction and discharged downward due to gravity to become the currently transported bars (10). The currently transported bars (10) are on the V-groove (31); The photoelectric sensor (37) detects the current conveying rod (10), and the cylinder rod (360) is retracted to drive the top block (35) to push the front end of the current conveying rod (10) along the V groove (31) through the limiting hole (38) into the limiting tube (25) on one side; The front end of the current conveying bar (10) enters between the rod feeding wheels (24), and the motor gear (22) drives the rod feeding wheel gear (23) and the rod feeding wheel (24) on the other side to rotate through the rod feeding wheel gear (23) on one side, so that the current conveying bar (10) enters the limit tube (25) on the other side; after the rear end of the current conveying bar (10) leaves the photoelectric sensor (37), the photoelectric sensor (37) controls the cylinder rod (360) to extend and drive the top block (35) to return, and after the top block (35) returns to the initial position, the to-be-conveyed bar (100) falls into the V-groove (31) under the action of gravity without being blocked by the top block (35), and the photoelectric sensor (37) detects the subsequent current conveying bar (10) and continues to feed; The front end of the current conveying rod (10) enters the additive mechanism (1) through the feeding hole (120), is cut and plasticized, and then flows out from the lower part of the sleeve (12) to the substrate. The stirring needle (110) stirs the bottom surface (121) of the sleeve to smooth it, completing the additive manufacturing.

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