Multi-tungsten-electrode argon arc coaxial wire feeding additive manufacturing device

Abstract

The utility model discloses a multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device, which relates to the technical field of electric arc additive manufacturing and comprises a mounting flange, a wire feeding head body, a wire feeding block and a tungsten electrode argon arc generating mechanism. One end of the mounting flange is used for being connected with a robot, and the other end of the mounting flange is used for being connected with the upper portion of the wire feeding block. The wire feeding block penetrates through the center of the wire feeding head body; at least two tungsten electrode argon arc generating mechanisms are symmetrically arranged on the wire feeding head body; a welding wire penetrates out of the center of the wire feeding block; and a tungsten electrode of the tungsten electrode argon arc generating mechanism is positioned below the wire feeding block and around the welding wire. According to the multi-arc coaxial wire feeding additive manufacturing device, the directionality influence of single-heat-source coaxial wire feeding can be avoided, meanwhile, daily maintenance of the wire feeding nozzle is facilitated, and the gas protection problem in the multi-arc coaxial wire feeding additive manufacturing process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of arc additive manufacturing, in particular to a multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device. Background Art

[0002] Metal additive manufacturing technology has become one of the most popular research hotspots at home and abroad. It is an advanced manufacturing technology based on three-dimensional model data. It manufactures metal parts by stacking metal powder or metal foil layer by layer. This technology has the advantages of high precision, high efficiency, high flexibility and low cost, and can accurately manufacture complex shapes and structures that are difficult to achieve with traditional processing methods. Metal additive manufacturing technology is not only suitable for traditional manufacturing industries such as medical, aerospace, automotive and medical fields, but also plays a role in emerging markets such as energy and construction industries. As a disruptive advanced manufacturing technology, metal additive manufacturing technology is profoundly changing the production methods and product design concepts of traditional manufacturing, providing a more efficient and economical choice for modern industry and service industries.

[0003] Additive manufacturing technology is divided into two development trends: wire feeding and powder feeding, depending on the deposition method. The powder feeding method is usually suitable for additive manufacturing of small-sized components, and the forming efficiency and metal powder utilization rate are not high; the wire feeding method saves materials, has low cost, and has good application development prospects. Among wire feeding additive manufacturing technologies, arc fuse additive manufacturing technology has high deposition efficiency and short production cycle, and is suitable for the manufacture of medium and large-sized metal parts with medium and low complexity. However, traditional arc additive manufacturing only allows single arc wire feeding additive. Although existing equipment has improved deposition efficiency and production cycle, there is still a lot of room for improvement. Based on this, how to invent a device that can greatly improve arc deposition efficiency while ensuring the quality of additives is a technical problem that technicians in this field urgently need to solve. Summary of the invention

[0004] In order to solve the above technical problems, the utility model provides a multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device, which can greatly improve the deposition efficiency while ensuring the quality of additive manufacturing.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides a multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device, comprising a mounting flange, a wire feeding head body, a wire feeding block and a tungsten electrode argon arc generating mechanism; one end of the mounting flange is used to be connected to a robot, and the other end of the mounting flange is used to be connected to the upper part of the wire feeding block; the wire feeding block passes through the center of the wire feeding head body; at least two tungsten electrode argon arc generating mechanisms are symmetrically arranged on the wire feeding head body; the welding wire passes through the center of the wire feeding block; the tungsten electrode of the tungsten electrode argon arc generating mechanism is located below the wire feeding block and around the welding wire.

[0007] Optionally, an insulating sleeve is provided between the wire feeding head body and the wire feeding block, and the other end of the mounting flange is connected to the insulating sleeve to avoid a short circuit between the wire feeding head body and the mounting flange.

[0008] Optionally, there is a wire feeding nozzle at the center of the wire feeding block, and the wire feeding nozzle includes a first quick connector, a wire feeding tube and a wire feeding nozzle; the wire feeding tube is a hollow columnar structure, and the outer wall of the wire feeding tube is connected to the through hole in the middle of the wire feeding block, the first quick connector is arranged on the top of the wire feeding tube, and the wire feeding nozzle is arranged on the bottom of the wire feeding channel, and the welding wire passes through the first quick connector, the wire feeding channel and the wire feeding nozzle in sequence.

[0009] Optionally, a shielding gas mechanism is also provided on the wire feeding block, and the shielding gas mechanism includes an air pipe joint, a second quick joint, a shielding gas channel and a sealing plug; one end of the shielding gas channel is connected to the through hole in the middle of the wire feeding block, and the other end of the shielding gas channel is provided with the second quick joint, one end of the air pipe joint is connected to the second quick joint, and the other end of the air pipe joint is used to be connected to the air pipe; the sealing plug is provided on the side wall of the wire feeding block.

[0010] Optionally, a through stepped hole is provided at the center of the wire feeding head body, a cooling channel is provided on the end face of the stepped hole, a liquid inlet and a liquid outlet are provided on the outer wall of the wire feeding mounting head, the liquid inlet and the liquid outlet are respectively connected to one end of the cooling channel, and a threaded water nozzle is provided on the liquid inlet and the liquid outlet.

[0011] Optionally, a water trough cover is provided at the top of the cooling channel, and sealing rings are provided at the bottom of the water trough cover, both on the inner side and the outer side of the cooling channel.

[0012] Optionally, the tungsten electrode argon arc generating mechanism includes a tightening nut, a conductive nozzle, a tungsten electrode clamp and a tungsten electrode; the conductive nozzle is connected to the wire feeding installation head, the tightening nut is arranged at the upper end of the conductive nozzle, the tungsten electrode clamp is arranged at the lower end of the conductive nozzle, the tungsten electrode is arranged in the tungsten electrode clamp, and the end of the tungsten electrode extends around the welding wire.

[0013] Optionally, the number of tungsten inert gas arc generating mechanisms disposed on the wire feeder body is 2-4, and the tungsten inert gas arc generating mechanisms share a welding power supply or use independent welding power supplies respectively.

[0014] Compared with the prior art, the utility model has achieved the following technical effects:

[0015] The utility model discloses a multi-arc coaxial wire feeding additive manufacturing device, comprising a mounting flange, a wire feeding head body, a wire feeding block and a tungsten arc generating mechanism; an insulating sleeve is provided between the tungsten arc generating mechanism and the wire feeding device, which can ensure that the welding wire and the tungsten needles of each tungsten arc generating mechanism are not at the same potential, thereby avoiding the directional influence of the coaxial wire feeding of a single heat source; a cooling channel is provided inside, which improves the heat dissipation efficiency of the device and solves the heat dissipation problem of the multi-arc coaxial wire feeding additive manufacturing device. The wire feeding nozzle is detachably provided at the axial center position of the wire feeding mounting head through a threaded structure, and is detachably provided in the wire feeding device, which is convenient for the daily maintenance of the wire feeding nozzle. The shielding gas device is provided at the top position of the wire feeding mounting head through a quick connector, and the quick connector is connected to the shielding gas channel. The shielding gas is transmitted through the shielding gas channel, thereby solving the gas protection problem in the multi-arc coaxial wire feeding additive manufacturing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device in the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the mounting flange in the multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device in the utility model;

[0019] Figure 3 It is a schematic cross-sectional structure diagram of a multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device in the utility model;

[0020] Figure 4 It is a structural schematic diagram of a tungsten electrode argon arc generating mechanism in a multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device in the utility model;

[0021] Figure 5 It is a schematic cross-sectional structural diagram of a tungsten electrode argon arc generating mechanism in a multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device in the utility model;

[0022] Figure 6 It is a structural schematic diagram of the wire feeding head body in the multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device in the utility model;

[0023] Figure 7 It is a schematic diagram of the top view of the structure of the wire feeding head body in the multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device in the utility model;

[0024] Figure 8 It is a schematic AA cross-sectional structure diagram of the wire feeding head body in the multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device in the utility model;

[0025] Fig. 9 It is a structural schematic diagram of a wire feeding device in a multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device in the utility model;

[0026] Fig.10 It is a schematic cross-sectional structural diagram of a wire feeding device in a multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device in the utility model;

[0027] Fig.11 It is a schematic cross-sectional structural diagram of a protective gas device in a multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device in the utility model.

[0028] Description of reference numerals:

[0029] 1. Mounting flange, 1-1. Fixing hole, 1-2. Through hole, 1-3. Long hole, 1-4. Positioning hole, 1-5. Positioning light hole,

[0030] 2. Wire feeding head body, 2-1. Insulating cover, 2-2. Cooling mechanism, 2-3. Cooling channel, 2-4. Liquid inlet, 2-5. Liquid outlet; 2-6. Sink cover, 2-7. Sealing ring, 2-8. Wire feeding device, 2-9. First quick connector, 2-10. Wire feeding channel, 2-11. Wire feeding nozzle, 2-12. Protective gas mechanism, 2-13. Air pipe connector, 2-14. Second quick connector, 2-15. Protective gas channel, 2-16. Sealing plug,

[0031] 3. Tungsten electrode argon arc generating mechanism, 3-1. Tightening nut, 3-2. Conductive nozzle, 3-3. Tungsten electrode clamp, 3-4. Tungsten needle,

[0032] 4. Threaded water nozzle,

[0033] 5. Welding wire,

[0034] 6. Wire feeding block. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] like Figures 1 to 11 As shown, this embodiment provides a multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device, including a mounting flange 1, a wire feeding head body 2, a wire feeding block 6 and a tungsten electrode argon arc generating mechanism 3; one end of the mounting flange 1 is used to connect to the robot, and the other end of the mounting flange 1 is used to connect to the upper part of the wire feeding block 6; the lower part of the wire feeding block 6 passes through the wire feeding head body 2; at least two tungsten electrode argon arc generating mechanisms 3 are symmetrically arranged on the wire feeding head body 2; the welding wire 5 passes through the center of the wire feeding block 6; the tungsten electrode of the tungsten electrode argon arc generating mechanism 3 is located below the wire feeding block 6 and around the welding wire 5.

[0037] In this specific embodiment, four tungsten inert gas arc generating mechanisms 3 are arranged on the wire feeder body 2, and in other specific embodiments, there are no less than two tungsten inert gas arc generating mechanisms 3. The tungsten inert gas arc generating mechanisms 3 are evenly and symmetrically distributed in the circumferential direction of the wire feeder body 2, and ensure that the extension lines of the tungsten needles 3-4 in the tungsten inert gas arc generating mechanisms 3 and the extension lines of the welding wire 5 intersect at one point. During welding, an arc is generated between each tungsten needle 3-4 and the substrate, melting the substrate and the welding wire 5, and the heat generated by each arc directly acts on the substrate and the welding wire 5, ensuring the bonding quality of the substrate and the cladding layer. In addition, during the additive manufacturing process, the tungsten inert gas arc generating mechanisms 3 are evenly distributed around the wire, and the welding wire 5 is evenly and fully melted, which greatly enhances the deposition quality while increasing the deposition efficiency.

[0038] An insulating cover 2-1 is provided between the wire feeding head body 2 and the wire feeding block 6, and the other end of the mounting flange 1 is connected to the insulating cover 2-1. The insulating cover 2-1 can be made of polytetrafluoroethylene. By providing the insulating cover 2-1 between the wire feeding device 2-8 and the tungsten electrode argon arc generating mechanism 3, the wire feeding device 2-8 and the tungsten electrode argon arc generating mechanism 3 are insulated, so that the welding wire 5 and the tungsten electrode are not at the same potential, and the tungsten electrode is energized to heat and melt the welding wire 5, thereby avoiding the welding wire 5 directly inserting into the molten pool to form a short circuit.

[0039] The mounting flange 1 includes a vertical support plate and a horizontal connecting rib; the bottom of the support plate is connected to one end of the connecting rib, and a plurality of positioning holes 1-4 and positioning light holes 1-5 are arranged on the upper part of the support plate; a fixing hole 1-1 and a long hole 1-3 are arranged on the other end of the connecting rib; one end of the long hole 1-3 is connected to the fixing hole 1-1; a through hole 1-2 is arranged on one side of the connecting rib, and the through hole 1-2 is connected to the long hole 1-3. The fixing hole 1-1 is used to connect with the wire feeding block 6. During installation, the fixing hole 1-1 is sleeved on the outer side of the wire feeding installation head 2, and then the screws are tightened to clamp the wire feeding installation head 2. In this embodiment, the support plate and the connecting rib are connected by screws. Specifically, the support plate and the connecting rib are vertically distributed, and a plurality of screw holes are arranged on the end surface of the connecting rib facing the support plate, and a plurality of through holes 1-2 are arranged at the corresponding position of the support plate. The screws pass through the through holes 1-2 and are screwed into the screw holes, thereby achieving the fixation between the support plate and the connecting rib. In other specific embodiments, the support plate and the connecting ribs may be an integrally formed structure.

[0040] The entire device can be fixed on the robot arm through the positioning holes 1-4. In addition, the two groups of positioning light holes 1-5 on the support plate are set at positions corresponding to the light holes on the robot arm. During installation, the upper and lower groups of positioning light holes 1-5 are calibrated concentrically with the light holes of the robot to maintain the accuracy of the entire multi-arc coaxial wire feeding additive manufacturing device.

[0041] A wire feeding nozzle 2-8 is arranged in the middle of the wire feeding block 6, and the wire feeding nozzle 2-8 includes a first quick connector 2-9, a wire feeding tube 2-10 and a wire feeding nozzle 2-11; the wire feeding tube 2-10 is a hollow columnar structure, and the outer wall of the wire feeding tube 2-10 is connected to the through hole in the middle of the wire feeding block 6, and the first quick connector 2-9 is arranged on the top of the wire feeding tube 2-10, and the wire feeding nozzle 2-11 is arranged on the bottom of the wire feeding tube 2-10, and the welding wire 5 passes through the first quick connector 2-9, the wire feeding tube 2-10 and the wire feeding nozzle 2-11 in sequence. It should be pointed out that: affected by the additive manufacturing environment, the wire feeding nozzle 2-11 is prone to wear and tear during operation. In this embodiment, the wire feeding nozzle 2-11 is detachably arranged in the wire feeding device 2-8, which is convenient for daily maintenance of the wire feeding nozzle 2-11; in addition, during the additive manufacturing process, different specifications of welding wires 5 need to be selected according to different process parameters. In this embodiment, the first quick connector 2-9 is detachably arranged in the wire feeding device 2-8, which is convenient for disassembly and replacement of wire feeding nozzles 2-11 and welding wires 5 of different specifications.

[0042] A shielding gas mechanism 2-12 is also provided on the wire feeding block 6, and the shielding gas mechanism 2-12 includes an air pipe joint 2-13, a second quick joint 2-14, a shielding gas channel 2-15 and a sealing plug 2-16; one end of the shielding gas channel 2-15 is connected to the through hole in the middle of the wire feeding block 6, and the other end of the shielding gas channel 2-15 is provided with a second quick joint 2-14, one end of the air pipe joint 2-13 is connected to the second quick joint 2-14, and the other end of the air pipe joint 2-13 is used to connect to the air pipe; a sealing plug 2-16 is provided on the side wall of the wire feeding block 6 to prevent gas leakage.

[0043] A through stepped hole is provided at the center of the wire feeding head body 2, and the cooling mechanism 2-2 includes a cooling channel 2-3 provided on the end surface of the stepped hole. A liquid inlet 2-4 and a liquid outlet 2-5 are provided on the outer wall of the wire feeding installation head 2, and the liquid inlet 2-4 and the liquid outlet 2-5 are respectively connected to one end of the cooling channel 2-3, and a threaded water nozzle 4 is provided on the liquid inlet 2-4 and the liquid outlet 2-5. When in use, the coolant is introduced into the channel through the liquid inlet 2-4 for cooling, so as to achieve the technical effect of cooling the tungsten electrode argon arc generating mechanism 3.

[0044] A water tank cover plate 2-6 is provided at the top of the cooling channel 2-3, and sealing rings 2-7 are provided at the bottom of the water tank cover plate 2-6, both inside and outside the cooling channel 2-3. The cooling channel 2-3 improves the heat dissipation efficiency of the device and solves the heat dissipation problem of the multi-arc coaxial wire feeding additive manufacturing device.

[0045] The tungsten electrode argon arc generating mechanism 3 includes a tightening nut 3-1, a conductive nozzle 3-2, a tungsten electrode clamp 3-3 and a tungsten needle 3-4; the conductive nozzle 3-2 is connected to the wire feeding head body 2, the tightening nut 3-1 is arranged at the upper end of the conductive nozzle 3-2, the tungsten electrode clamp 3-3 is arranged at the lower end of the conductive nozzle 3-2, the tungsten needle 3-4 is arranged in the tungsten electrode clamp 3-3, and the end of the tungsten needle 3-4 extends around the welding wire 5. Specifically, the tightening nut 3-1 is used to press the tungsten electrode clamp 3-3 to fix the tungsten needle 3-4, and the conductive nozzle 3-2 is tightened in the wire feeding installation head 2 by threading; the other end of the conductive nozzle 3-2 is inserted into the tungsten electrode clamp 3-3, and the tungsten needle 3-4 is inserted into the tungsten electrode clamp 3-3. In this specific embodiment, the conductive nozzle 3-2 and the tungsten electrode clamp 3-3 are both made of copper for easy conduction.

[0046] When the device is in use, the welding wire 5 passes through the first quick connector 2-9 and the wire feeding tube 2-10 and is directly inserted into the wire feeding nozzle 2-11. The welding wire 5 passes through the wire feeding nozzle 2-11 and intersects with the extension lines of the tungsten needles 3-4 of each tungsten inert gas arc generating mechanism 3 at the same point. The incident angle of each group of tungsten inert gas arc generating mechanisms 3 and the center direction of the wire feeding installation head 2 is 45°-70°, which can be specifically set according to needs. In addition, in this embodiment, the maximum diameter of the wire feeding head body 2 is 100mm, and the center distance between the four tungsten inert gas arc generating mechanisms 3 is 13-14mm.

[0047] The working principle of the multi-tungsten argon arc coaxial wire feeding additive manufacturing device in this embodiment is:

[0048] Four groups of tungsten electrode argon arc generating mechanisms 3 are connected to the same welding power source. This structure not only ensures good conductivity of the conductive nozzle 3-2, but also prevents the tungsten needle 3-4 from overheating, thereby increasing the continuous working time and service life of the multi-arc coaxial wire feeding additive manufacturing device.

[0049] By setting appropriate process parameters and giving the wire feeder wire output signal, welding wires of different compositions and sizes can be selected according to the composition of the workpiece to be welded to realize additive manufacturing. During the additive manufacturing process, each arc is extremely stable under the inert shielding gas, and the shielding gas always works simultaneously with the wire feeding mechanism to protect the molten pool from oxidation.

[0050] Compared with traditional arc additive manufacturing, the use of the multi-arc coaxial wire feeding additive manufacturing device in this embodiment for additive manufacturing can effectively overcome the problems of complex procedures and multiple repeated welding in the additive manufacturing process; in addition, the multi-arc coaxial wire feeding additive manufacturing device in this embodiment has a simple structure and a small volume, is easy to disassemble and repair, and is easy to use. It has stronger additive manufacturing capabilities, improves the stability of the additive process, reduces internal defects, and significantly improves additive efficiency.

[0051] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0052] This specification uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device, characterized in that: It includes a mounting flange, a wire feeding head body, a wire feeding block and a tungsten inert gas arc generating mechanism; one end of the mounting flange is used to connect to the robot, and the other end of the mounting flange is used to connect to the upper part of the wire feeding block; the wire feeding block passes through the center of the wire feeding head body; at least two tungsten inert gas arc generating mechanisms are symmetrically arranged on the wire feeding head body; the welding wire passes through the center of the wire feeding block; the tungsten electrode of the tungsten inert gas arc generating mechanism is located below the wire feeding block and around the welding wire.

2. The multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device according to claim 1, characterized in that: An insulating sleeve is arranged between the wire feeding head body and the wire feeding block, and the other end of the mounting flange is connected to the insulating sleeve.

3. The multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device according to claim 1, characterized in that: A wire feeding nozzle is arranged in the middle of the wire feeding block, and the wire feeding nozzle includes a first quick connector, a wire feeding tube and a wire feeding nozzle; the wire feeding tube is a hollow columnar structure, and the outer wall of the wire feeding tube is connected to the through hole in the middle of the wire feeding block, the first quick connector is arranged on the top of the wire feeding channel, and the wire feeding nozzle is arranged on the bottom of the wire feeding tube, and the welding wire passes through the first quick connector, the wire feeding channel and the wire feeding nozzle in sequence.

4. The multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device according to claim 1, characterized in that: A shielding gas mechanism is also provided on the wire feeding block, and the shielding gas mechanism includes an air pipe joint, a second quick joint, a shielding gas channel and a sealing plug; one end of the shielding gas channel is connected to the through hole in the middle of the wire feeding block, and the other end of the shielding gas channel is provided with the second quick joint, one end of the air pipe joint is connected to the second quick joint, and the other end of the air pipe joint is used to be connected to the air pipe; the sealing plug is provided on the side wall of the wire feeding block.

5. The multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device according to claim 1, characterized in that: A through stepped hole is provided in the middle of the wire feeding head body, a cooling channel is provided on the end face of the stepped hole, a liquid inlet and a liquid outlet are provided on the outer wall of the wire feeding head body, the liquid inlet and the liquid outlet are respectively connected to one end of the cooling channel, and a threaded water nozzle is provided on the liquid inlet and the liquid outlet.

6. The multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device according to claim 5, characterized in that: A water tank cover is arranged on the top of the cooling channel, and sealing rings are arranged on the inner and outer sides of the cooling channel at the bottom of the water tank cover.

7. The multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device according to claim 5, characterized in that: The tungsten electrode argon arc generating mechanism includes a tightening nut, a conductive nozzle, a tungsten electrode clamp and a tungsten electrode; the conductive nozzle is connected to the wire feeding head body, the tightening nut is arranged at the upper end of the conductive nozzle, the tungsten electrode clamp is arranged at the lower end of the conductive nozzle, the tungsten electrode is arranged in the tungsten electrode clamp, and the end of the tungsten electrode extends around the welding wire.

8. The multi-tungsten electrode argon arc coaxial wire feeding additive manufacturing device according to claim 1, characterized in that: The number of argon tungsten arc generating mechanisms arranged on the wire feeder body is 2-4, and the argon tungsten arc generating mechanisms share a welding power source or use independent welding power sources respectively.

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