Paraxial rod feeding coaxial deposition friction stir additive manufacturing device and method

Abstract

The invention relates to a paraxial rod feeding coaxial deposition friction stir additive manufacturing device and method, and belongs to the technical field of additive manufacturing. Comprising a material adding mechanism, a rod conveying mechanism, a feeding mechanism and a supporting mechanism, and the rod conveying mechanism and the feeding mechanism are connected with the material adding mechanism through the supporting mechanism. According to the paraxial continuous bar feeding device, paraxial continuous feeding of bars and synchronous coaxial deposition solid-phase additive manufacturing can be achieved, large axial force needed by traditional coaxial bar feeding stirring friction additive manufacturing is reduced, and the problem that continuous feeding of materials is difficult to achieve in coaxial bar feeding additive manufacturing is solved.

Description

Technical Field

[0001] The 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, the mainstream stir friction additive manufacturing technology can be divided into four categories according to the form of its raw materials, namely, 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, but in 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, CN117161406A, etc. Wire, as a material that can be bent and coiled, has successfully prepared a variety of aluminum alloys or magnesium alloys with good toughness, and processed into coiled wires or barrel wires. It is an ideal material that can achieve continuous feeding and has the conditions for realizing continuous additive manufacturing of large components, such as CN115647569A, CN115502544A and other published patents. However, there are still some unresolved problems in wire-type friction stir additive manufacturing technology: First, materials with poor plasticity are difficult to prepare into corresponding wires through deformation, which limits the application scope of friction stir 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 limited material volume fed into the additive device per unit time, and it is difficult to significantly improve the deposition efficiency.

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

[0005] In order to solve the above problems, a device and method for stir friction additive manufacturing with coaxial deposition by a side-axis rod feeding are provided. A brief overview of the invention is given 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 determine the 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 parallel axis rod feeding coaxial deposition stir friction additive manufacturing device comprises an additive mechanism, a rod feeding mechanism, a feeding mechanism and a supporting mechanism. The rod feeding mechanism and the feeding mechanism are both connected to the additive mechanism through 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 part of the screw is a screw clamping part, 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 limit tube and a spring clamping structure; the motor gear and a 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 clamping 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 clamping structure is connected to the rod feeding machine back plate; and limit tubes are arranged at the front and rear ends of the rod feeding machine back plate.

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

[0013] The rod feeding mechanism also includes a limit tube bracket, the limit tube is provided with a bell mouth, the limit tube is detachably connected to the rod feeding mechanism through the limit tube bracket, and the position of the limit tube is correspondingly arranged 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, and the taper angle should be 10-45°, which can realize the automatic centering of the rod between the two rod feeding wheels. The side of the rod feeding wheel adopts laser etching wheel side groove to increase the friction between the rod feeding wheel and the conveying rod to prevent slipping during the feeding process;

[0015] The spring clamping structure includes a clamping frame, a spring, a clamping nut and a sliding rod. One end of the two clamping frames is hinged, and the other end of the clamping frame is provided with a U-shaped slide groove. A T-shaped slide rod is fixed on the back plate of the rod feeding machine. The vertical section of the slide rod is connected to the back plate of the rod feeding machine. 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 clamping nut. The horizontal section of the slide rod is arranged in the U-shaped slide groove of the clamping frame. The U-shaped slide groove of the clamping 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 clamping 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, the photoelectric sensor and the limit hole 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 comprises 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 bottom plate, a light-through hole is processed on the back plate, the sensor bracket is M-shaped, a screw and a nut are arranged on the middle vertical plate of the sensor bracket, the screw passes through the sensor bracket mounting hole, and after adjusting the position, the nuts on both sides of the screw are tightened to clamp the bottom plate to fix the sensor bracket. A vertical plate on one side of the sensor bracket is located on the left side of the light-through hole, a receiver is installed on a vertical plate on one side of the sensor bracket, a vertical plate on the other side of the sensor bracket is located on the right side of the light-through hole, a transmitter is installed on the vertical plate on the other side of the sensor bracket, and the limit tube is arranged corresponding to the limit hole.

[0019] Preferably: the supporting mechanism comprises a mounting plate, a dynamic shoulder tool holder, a static shoulder bracket, an end cover of the static shoulder bracket, 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 end cover of the static shoulder bracket, the dynamic shoulder tool holder is coaxially rotatably 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, the second rod feeder bracket is processed with two parallel second rectangular mounting holes, the top of the second rod feeder bracket is processed with a threaded hole, the third rod feeder bracket is processed with a third rectangular mounting hole, the third rod feeder bracket is adjusted to a suitable position, the third bolt passes through the second rectangular mounting hole and the third rectangular mounting hole and is tightened 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 a number of 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 respectively hinged to the middle part of the channel steel beam and the upper part of the mounting plate.

[0020] Preferably: the pull rod includes an articulated 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 an articulated seat, and the two articulated 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, using a coaxial deposition friction stir additive manufacturing device using a side-axis rod feeding method, comprising the following steps:

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

[0023] The bars to be transported are arranged in a single piece in the vertical direction, and are 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 and 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 transported rod enters between the rod feeding wheels, and the motor gear drives the rod feeding wheel gear and the rod feeding wheel on the other side to rotate through the rod feeding wheel gear on one side, so that the currently transported rod 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 top block to return. After the top block returns to the initial position, the conveying bar falls into the V groove under the action of gravity without the obstruction of the top 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, and after being cut and plasticized, it 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 axis continuous rod feeding device of the present invention can realize the parallel axis continuous feeding of rods and synchronous coaxial deposition solid phase additive manufacturing, which reduces the large axial force required for traditional coaxial rod feeding friction stir additive manufacturing and solves the problem that it is difficult to realize continuous material feeding in coaxial rod feeding additive manufacturing;

[0030] 2. The rod material used in the present invention has a larger diameter and higher rigidity, which effectively avoids the problem of reduced rigidity of the additive material due to softening and deformation due to heat, and solves the problem of easy clogging of the feed port in the traditional stir friction additive manufacturing method;

[0031] 3. In the process of feeding rods in the side axis, the present invention can realize the alternate feeding and deposition of reinforcing phase rods of different materials, different compositions and different volume fractions, and can realize high-performance large-size components with organizational gradient changes or alternating strength and toughness changes;

[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 size of the formed material particles is larger, which is beneficial to enhancing the heat generation and plastic flow inside the additive device and significantly improving the deposition efficiency.

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

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

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

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

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

[0040] Figure 7 It 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-support mechanism, 10-currently conveyed rod, 100-to-be conveyed rod, 11-screw, 110-stirring needle, 111-spiral groove, 112-screw clamping part, 12-sleeve, 120-feeding hole, 121-sleeve bottom surface, 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-groove, 242-wheel side groove, 25-limiting tube, 250-bell mouth, 251-limiting tube bracket, 26-spring clamping structure, 260-compression frame, 261-spring, 262-compression nut, 263-sliding 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-moving shaft shoulder handle, 42-static shaft shoulder bracket, 43-static shaft shoulder bracket end cover, 44-first rod feeding machine bracket, 45-second rod feeding machine bracket, 46-third rod feeding machine bracket, 47-channel steel beam, 48-aluminum profile bracket, 49-pull rod, 490-hinged seat, 491-pull rod arm, 492-connecting stud. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described below by specific implementation cases shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0044] Specific implementation method 1: Combination Figure 1-8 The present embodiment is described. A side-axis rod feeding coaxial deposition stir friction additive manufacturing device of the present embodiment comprises an additive mechanism 1, a rod feeding mechanism 2, a feeding mechanism 3 and a support mechanism 4. The rod feeding mechanism 2 and the feeding mechanism 3 are connected to the additive mechanism 1 through the support mechanism 4; the feeding 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 out by the feeding mechanism 3 and transporting the rods to the additive mechanism 1, the additive mechanism 1 is responsible for cutting the rods into small particles, transporting 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 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 sleeve 12 is a hollow structure, and its inner wall and the spiral groove 111 of the screw enclose a spiral cavity, and a feeding hole 120 is provided on the side wall to communicate with the cavity, so as to feed the rod (currently conveying the rod 10) into the cavity;

[0046] The upper part of the screw 11 is a screw clamping part 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, when the additive test is performed, the screw 11 rotates at a high speed, and the bottom stirring pin 110 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, cut into block-shaped particles by the screw 11, and transported to the bottom of the mechanism along the spiral groove 111 for extrusion; the particles are mixed with the substrate material through 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 limit tube 25 and a spring clamping 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 through bolts. 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 clamping 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 clamping structure 26 is connected to the rod feeding machine back plate 21. Limit tubes 25 are set at the front and rear ends of the rod feeding machine back plate 21.

[0050] The rod feeding mechanism 2 also includes a bolt 240, and the rod feeding wheel gear 23 is connected to the rod feeding wheel 24 through the bolt 240. The two rod feeding wheels 24 arranged on the left and right are arranged correspondingly, and 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 also includes a limit tube bracket 251. The input end of the limit tube 25 is provided with a bell mouth 250 for easy feeding. The limit tube 25 is inserted into the through hole of the limit tube bracket 251 and is detachably connected to the rod feeding mechanism 2 by being tightened and fixed with screws. The limit tube bracket 251 is welded to the rod feeding mechanism 2. The limit tube 25 is arranged correspondingly between the two corresponding rod feeding wheels 24 on the left and right.

[0052] The side of the rod feeding wheel 24 is processed with a V-shaped groove 241, which can realize the automatic centering of the rod between the two rod feeding wheels 24. The side of the rod feeding wheel 24 is laser-etched with a wheel side groove 242 to increase the friction between the rod feeding wheel 24 and the rod 10 to prevent slipping during the rod feeding process;

[0053] The spring clamping structure 26 includes a clamping frame 260, a spring 261, a clamping nut 262 and a slide bar 263. One end of the two clamping frames 260 is hinged to each other, and the other end of the clamping 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 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 with a clamping nut 262. The tightening nut 262, the horizontal section of the slide bar 263 is arranged in the U-shaped slide groove of the pressing frame 260, 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, and the rod feeding wheel gear 23 on the other side 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 tightening nut 262, the force of the spring 261 on the pressing frame 260 is changed, so that the pressure adjustment is realized, 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 installed on the rod feeding wheel gear 23 by bolts 240, so that the stepping motor 20 can drive the rod feeding wheels 24 on both sides to rotate synchronously; the rod feeding wheel 24 is processed with a V-shaped groove 241 to realize the automatic centering of the rod material, and the working surface of the rod feeding wheel is processed with a wheel side groove to increase the friction force and prevent slipping during the rod feeding process; the rod feeding wheels 24 on both sides are adjusted to have sufficient clamping force on the rod material 10 by a spring clamping structure 26; the front and rear ends of the rod feeding mechanism are respectively installed with limit tubes 25 to prevent the rod material from deviating from the predetermined track 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 lower part of the back plate 30. The rods 100 to be transported are stacked in the gap between the back plate 30 and the cover plate 32. A V-groove 31 is arranged 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 rod 10 to pass through. After the current transport rod 10 is transported out, the rods 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 bottom plate 33 is installed with the V-groove 31 and the cylinder 36, the front side of the bottom plate 33 is installed with the guide shaft 34, the rear side of the bottom plate 33 is installed with the photoelectric sensor 37 and the limit hole 38 arranged front and back, the photoelectric sensor 37 is located on the side of the current conveying bar 10, the limit hole 38 is located at the front end of the feeding mechanism 3, the output end of the cylinder 36 is connected with the top block 35, the top block 35 is slidably connected with 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 with the photoelectric sensor 37;

[0056] The feeding mechanism 3 also 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.

[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-through hole 301 is processed on the back plate 30 at a position corresponding to the current conveying rod 10. The sensor bracket 370 is M-shaped. A screw and a nut are arranged 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, a vertical plate on one side of the sensor bracket 370 is located on the left side of the light hole 301 and the V groove 31, a receiver 372 is installed on the vertical plate on one side of the sensor bracket 370, and a vertical plate on the other side 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 vertical plate on the other side of the sensor bracket 370, and the light hole 301 avoids the shielding of 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 silo into the V-groove 31, blocking the light hole 301 at the end of the mechanism, and the photoelectric sensor 37 cannot receive the light signal, so it sends a signal to the cylinder 36 to retract it, and controls the top block 35 to eject the single rod 10; when the top block 35 moves to the limit position of the guide shaft bracket 340, it cannot continue to move, but at this time the rod 10 has been fed into the rod feeding mechanism 2, and is clamped by the rod feeding wheel 24 to continue to be transported, and the static top block 35 and the rod 10 being transported together play a role in supporting the remaining rods 100; when the rod 10 being transported passes through the light hole 301, the photoelectric sensor 37 senses light, sends a signal to the cylinder 36 to eject it, and controls the top block 35 to move out of the bottom range of the silo, and at this time the rod 10 being transported also just moves out of the bottom range of the silo, and the remaining rods 100 in the silo fall down, blocking the light hole 301 again, and controlling the cylinder to retract and eject the single rod again, 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 the bars downward due to gravity; the V groove 31 is installed on the back plate 30 and keeps Figure 7 The installation relationship shown in the figure makes it possible for the side space to be insufficient for the remaining bars 100 to fall after a single bar 10 is fed into the V-groove 31; the cylinder 36 is connected to the ejector block 35 through the cylinder rod 360, and is limited by the guide shaft 34, so that the ejector block can move between the two guide shaft brackets 340; the ejection and retraction of the cylinder rod 360 are controlled by the photoelectric sensor 37, and its position can be adjusted through the back plate sensor bracket mounting hole 300, and the receiver 372 is light-sensitive for ejection and not light-sensitive for retraction. A limit hole 38 is set at the end of the feeding mechanism to constrain the movement trajectory of the bar;

[0060] The supporting mechanism 4 includes a mounting plate 40, a moving shoulder tool holder 41, a stationary shoulder bracket 42, a stationary 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 crossbeam 47, an aluminum profile bracket 48 and a pull rod 49. The screw clamping portion 112 of the screw 11 is connected to the moving shoulder tool holder 41, and the sleeve clamping portion 122 of the sleeve 12 is clamped and fixed between the stationary shoulder bracket 42 and the stationary shoulder bracket end cover 43. The moving shoulder tool holder 41 is connected to the mounting plates 40 and the stationary shoulder bracket 42 on the upper and lower sides. The mounting plate 40 is relatively fixed to the static shoulder bracket 42, and two third rod feeder brackets 46 are arranged at the front end of the rod feeder back plate 21. The two second rod feeder brackets 45 are symmetrically arranged on the outside of the two third rod feeder brackets 46. The upper ends of the second rod feeder brackets 45 are connected to the corresponding horizontally arranged first rod feeder brackets 44. 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. The first rectangular hole is processed on the first rod feeder bracket 44, and 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 passes through the second rectangular mounting hole and the third rectangular mounting hole and is tightened with the third nut to fix the third rod feeder bracket 46 and the second rod feeder bracket 45. The second bolt passes through the first rectangular hole and is 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 feeding machine bracket 44, and can be adjusted in various horizontal directions, vertical directions, and tilt angles. 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 portion of the channel steel beam 47 is rotatably connected to the mounting plate at the rear end of the first rod feeding machine bracket 44. The mounting plate is provided with an arc-shaped slide groove. The rear end of the channel steel beam 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 beam 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 by 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 effect 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 the 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 existing in the existing friction stir additive manufacturing technology, such as difficulty in continuous material feeding, low deposition efficiency, and narrow material applicability, while taking 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 present embodiment is described. A side-axis rod feeding coaxial deposition stir friction additive manufacturing method of the present embodiment adopts the side-axis rod feeding coaxial deposition stir friction additive manufacturing device described above, 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; the sleeve is a hollow structure, and its inner wall and the spiral groove of the screw enclose 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 clamping 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 silo 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, and the rod moves into the rod feeding wheel, and then is clamped by the rod feeding wheel to continue conveying; when the rod moves out of the silo range, the photoelectric sensor senses light and sends a signal to the cylinder, driving the cylinder to push the ejector block out of the silo range, and the next rod falls, thereby 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 through the pull rod;

[0065] During the additive process, the rod material falls into the V-groove from the hopper in the feeding mechanism, and is fed into the rod feeding mechanism by the top block driven by the cylinder. 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 particles by the spiral groove of the rotating screw and moves to the bottom of the screw along the spiral cavity. During the transportation process, the particles are deformed and heated by the extrusion and friction between the screw and the barrel wall, and plasticized. Finally, the plasticized material is extruded through the gap between the screw and the bottom of the sleeve, mixed with the substrate or the upper layer of material under the action of the stirring needle, and forms a dense deposition layer under the forging action of the bottom surface of the sleeve.

[0066] The method comprises the following steps:

[0067] Step 1: According to the different materials, sizes and performance requirements of the additive components, select a rod material with a suitable diameter, design the dimensions of the screw 11 and the sleeve 12, ensure that the rod can enter the spiral cavity through the feeding hole 120, and be sheared into material particles of suitable size through the relative rotation of the sleeve 12 and the 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 to 40 mm, the length of the stirring needle is 0.3 to 5 mm, the depth of the screw groove is 1 to 5 mm, and the pitch is 10 to 30 mm;

[0070] The number of screw grooves of the screw can be 1 to 3, and an increase in 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 an increase in the number of stirring pins can improve the mixing degree of the deposition material and the substrate;

[0071] Step 2: Install the screw clamping part 112 of the screw 11 onto the dynamic shoulder handle 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 needle 110 should be fully extended to ensure that the stirring needle 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 rod size, and adjust the gap between the upper and lower rod feeding wheels 24 (feeding wheels) through the spring clamping 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 material. The cone angle should be 10-45°. Small grooves are etched on the contact surface between the rod feeding wheel and the rod material to increase the friction coefficient between the two and avoid slipping during the rod feeding process.

[0074] Step 4: Install and debug the feeding mechanism 3 so that the bar material can fall from the silo into the V-shaped groove 241, adjust the position of the photoelectric sensor 37 so that the moment when the sensor controls the cylinder 36 to eject coincides with the moment when the bar material is completely transported out of the silo, so that the next bar material can fall smoothly; install the feeding mechanism 3 on the bracket, keep its inclination angle the same as that of the rod feeding mechanism 2, and maintain a certain installation height so that the bar material in the V-shaped groove 241 can enter the limiting tube 25 of the rod feeding machine through the limiting hole 38;

[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 rod. The cylinder 36 drives the top block 35 to transport the rod, which is only to send the rod into the rod feeding wheel, and then the rod feeding machine continues to complete the transportation task. Therefore, the distance between the limit hole 38 and the rod 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 into the V groove smoothly and continue the feeding process;

[0078] Step 5: According to the shape of the additive component, design a reasonable additive path 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;

[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 speed 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 needle 110 penetrates into the substrate. After reaching a predetermined depth, the rod feeding mechanism 2 is started, and the rod enters the additive mechanism through the feeding hole, is cut into block-shaped particles 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 particles exist in a granular form; as the volume of the extruded particles 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 particles generates heat, and the particles are deformed and gradually plasticized; at this time, the welding machine is started to feed, and the plasticized particles are continuously extruded from the bottom of the device, mixed with the substrate material through the stirring action of the stirring needle, 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, the plasticization position of the particles is advanced, occurs in the spiral cavity, and gradually reaches 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 the sleeve 12 are lifted upward by a layer height and then continue to feed; at this time, the additive process continues to proceed stably on the previous deposition layer;

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

[0083] The present invention can solve the problems existing in the existing friction stir additive manufacturing technology, such as difficulty in continuous material feeding, low deposition efficiency, and narrow material applicability, and can also realize 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 arranged and combined, and those skilled in the art can exhaust all possibilities based on the mathematical knowledge of arrangement and combination. Therefore, the present invention will no longer describe the technical solutions after arrangement and combination one by one, but it should be understood that the technical solutions after arrangement and combination have been disclosed by the present invention.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A coaxial deposition stir friction additive manufacturing device with a side-axis rod feeding, characterized in that: It comprises a material adding mechanism (1), a rod feeding mechanism (2), a loading mechanism (3) and a supporting mechanism (4); the rod feeding mechanism (2) and the loading mechanism (3) are both connected to the material adding mechanism (1) via the supporting mechanism (4).

2. The device for coaxial deposition and friction stir additive manufacturing with a side-axis rod feeding method according to claim 1, characterized in that: The material adding mechanism (1) comprises a screw (11) and a sleeve (12); the screw (11) is located inside the sleeve (12), and the screw (11) and the sleeve (12) are coaxially arranged.

3. The device for coaxial deposition and friction stir additive manufacturing with a side-axis rod feeding method according to claim 2, characterized in that: The upper part of the screw (11) is a screw clamping part (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) is provided with 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).

4. The device 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 stop 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) and the stepping motor (20) are connected to each other. ), the motor gear (22) is meshed with a rod feeding wheel gear (23) on one side, the rod feeding wheel gear (23) on the other side is connected to a 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 a rod feeding wheel (24), the spring pressing structure (26) is connected to a rod feeding machine back plate (21), and limit tubes (25) are provided at the front and rear ends of the rod feeding machine back plate (21).

5. The device for coaxial deposition and friction stir additive manufacturing with a side-axis rod feeding method according to claim 4, characterized in that: The rod feeding mechanism (2) further comprises a bolt (240), the rod feeding wheel gear (23) is connected to the rod feeding wheel (24) via the bolt (240), the two rod feeding wheels (24) are arranged correspondingly, the two rod feeding gear groups are arranged on both sides of the motor gear (22), and the two sides of the two rod feeding gear groups are provided with a limit tube (25); the limit tube (25) is arranged correspondingly to the feeding hole (120); The rod feeding mechanism (2) further comprises a position limiting tube support (251), the position limiting tube (25) being provided with a bell mouth (250), the position limiting tube (25) being detachably connected to the rod feeding mechanism (2) via the position limiting tube support (251), and the position between the position limiting tube (25) and the two rod feeding wheels (24) being arranged correspondingly; a V-shaped groove (241) matching the diameter of the rod (10) is processed 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 wheel side groove (242) is laser-etched on the side surface of the rod feeding wheel (24), so as to increase the friction between the rod feeding wheel (24) and the rod (10), so as to prevent slipping during the rod feeding process; The spring clamping structure (26) comprises a clamping frame (260), a spring (261), a clamping nut (262) and a slide bar (263). One end of the two clamping frames (260) is hinged, and the other end of the clamping 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. A spring (261) is mounted on the flat section, a clamping nut (262) is threadedly connected to the end of the horizontal section of the slide bar (263), the horizontal section of the slide bar (263) is arranged in the U-shaped slide groove of the clamping frame (260), the U-shaped slide groove of the clamping frame (260) is located between the vertical section of the slide bar (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 part of the clamping frame (260).

6. The device for coaxial deposition and friction stir additive manufacturing with side-axis rod feeding 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 bottom plate (33) is installed with a V-groove (31) and a cylinder (36), the front side of the bottom plate (33) is installed with a guide shaft (34), the rear side of the bottom plate (33) is installed with a photoelectric sensor (37) and a limiting hole (38) arranged front and rear, 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).

7. The device for coaxial deposition and friction stir additive manufacturing with a side-axis rod feeding method according to claim 6, characterized in that: The feeding mechanism (3) further comprises a guide shaft bracket (340) and a cylinder rod (360), wherein the cylinder (36) is connected to the top block (35) via the cylinder rod (360), and the two ends of the guide shaft (34) are connected to the bottom plate (33) via the guide shaft bracket (340); The photoelectric sensor (37) comprises 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 arranged on a 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) so that the sensor bracket (370) is fixed. A vertical plate on one side of the sensor bracket (370) is located on the left side of the light-through hole (301). A receiver (372) is installed on a vertical plate on one side of the sensor bracket (370). A vertical plate on the other side of the sensor bracket (370) is located on the right side of the light-through hole (301). A transmitter (371) is installed on a vertical plate on the other side of the sensor bracket (370). The limit tube (25) is arranged corresponding to the limit hole (38).

8. The device for coaxial deposition and friction stir additive manufacturing with a side-axis rod feeding method according to claim 1, characterized in that: The support mechanism (4) includes a mounting plate (40), a dynamic shoulder tool handle (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 crossbeam (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 handle (41); 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 handle (41) is coaxially rotatably connected with 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 with 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 ends of the second rod feeder brackets (45) are connected with the corresponding first rod feeder brackets (44), and the rear ends of the first rod feeder brackets (44) are connected with the corresponding first rod feeder brackets (44). The first rod feeder bracket (44) is fixedly connected to the mounting plate (40), a first rectangular hole is processed on the first rod feeder bracket (44), two second rectangular mounting holes arranged in parallel are processed on the second rod feeder bracket (45), a threaded hole is processed on the top of the second rod feeder bracket (45), and a third rectangular mounting hole is processed on the third rod feeder bracket (46). The third rod feeder bracket (46) is adjusted to a suitable position, and a third bolt is passed through the second rectangular mounting hole and the third rectangular mounting hole and then tightened with a third nut to make the third rod feeder bracket (46) and the second rod feeder bracket (45) 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).

9. The device for coaxial deposition and friction stir additive manufacturing with a side-axis rod feeding method according to claim 8, characterized in that: 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.

10. A friction stir additive manufacturing method with coaxial deposition and side-axis rod feeding, characterized in that: The device for coaxial deposition and friction stir additive manufacturing using a side-axis rod feeding device as claimed in any one of claims 1 to 9 comprises the following steps: The positions of the rod feeding mechanism (2) and the material loading mechanism (3) are adjusted by means of the supporting 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 current transport bar (10), and the current transport bar (10) is on the V groove (31); The photoelectric sensor (37) detects the currently conveyed rod (10), and the cylinder rod (360) is retracted to drive the top block (35) to push the front end of the currently conveyed rod (10) along the V groove (31) through the limiting hole (38) and enter the limiting tube (25) on one side; The front end of the currently conveyed bar material (10) enters between the bar feeding wheels (24), and the motor gear (22) drives the bar feeding wheel gear (23) and the bar feeding wheel (24) on the other side to rotate through the bar feeding wheel gear (23) on one side, so that the currently conveyed bar material (10) enters the limit tube (25) on the other side; after the rear end of the currently conveyed bar material (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 bar material (100) to be conveyed 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 that the subsequent currently conveyed bar material (10) continues to be fed; The front end of the current conveying rod (10) enters the additive mechanism (1) through the feeding hole (120), and after being sheared and plasticized, it flows out from the lower part of the sleeve (12) onto the substrate, and the stirring needle (110) stirs the bottom surface (121) of the sleeve to smoothen it, thus completing the additive manufacturing.

Images