Coaxial ultrasonic vibration assisted arc fuse additive manufacturing device and method

Abstract

The invention relates to a coaxial ultrasonic vibration assisted arc fuse additive manufacturing device and method, belongs to the technical field of additive manufacturing, overcomes the directivity and sequence problems of paraxial arrangement by coaxially coupling an ultrasonic welding gun and an arc welding gun, and can perform additive manufacturing in any direction. An insulating sleeve is arranged between an ultrasonic welding gun and an electric arc welding gun for electrical isolation, a water cooling pipeline and gas protection are arranged, a welding gun head is effectively protected, oxidation bonding is prevented, a vertical reciprocating punching structure is connected to the upper portion of the ultrasonic composite welding gun, the welding gun is lifted through vertical vibration, and the welding gun is prevented from being damaged. The whole device is high in automation degree, the three-dimensional movement mechanism is combined, full-automatic additive manufacturing can be achieved, and the production efficiency and the forming quality are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and in particular to a coaxial ultrasonic vibration assisted arc fuse additive manufacturing device and method. Background Art

[0002] In traditional arc fuse additive manufacturing, metal materials are melted by arc heating and then deposited layer by layer to form parts. However, due to the slow cooling rate of the arc molten pool, the grains tend to be coarse, resulting in poor mechanical properties of the formed parts, especially insufficient tensile strength and fatigue performance. In addition, during the additive process, the high-temperature metal surface is prone to oxidation or bonding problems, affecting the forming accuracy and surface quality. In order to solve the above problems, researchers have tried to introduce ultrasonic vibration-assisted technology to improve the performance of additive parts. Ultrasonic vibration acts on the molten pool and the newly solidified metal through high-frequency mechanical oscillations, which can significantly refine the grains, promote the formation of uniform structure, and improve material strength and surface accuracy through micro-forging.

[0003] However, the existing technology mostly uses a paraxial arrangement of ultrasonic vibration devices, that is, the ultrasonic welding gun and the arc welding gun are placed in different positions. This paraxial structure has problems with directionality and sequence, and it is difficult to adapt to the additive manufacturing needs of complex paths. At the same time, during multi-axis motion, the paraxial structure may reduce the efficiency of ultrasonic vibration energy transmission, and even cause uneven energy distribution. In addition, the paraxial design has high requirements for the motion control of the equipment, which increases the complexity and cost of the system.

[0004] Since there are many deficiencies in the ultrasonic assisted vibration of the off-axis design, attempts have been made in the prior art to arrange the ultrasound and the welding gun coaxially, but there are still many problems in practical applications. One approach is to directly fix the ultrasonic device and the welding gun up and down, and transmit the ultrasonic vibration to the molten pool through the welding gun. Although this scheme overcomes the directionality and sequentiality problems of the off-axis structure, when the ultrasonic vibration is transmitted to the molten pool through the welding gun, the vibration will attenuate, and there is a problem of low energy transfer efficiency. There are also coaxial schemes that directly transmit ultrasonic energy to the molten pool through the welding wire. The vibrating welding wire will stir the molten pool, affecting the forming accuracy and stability. In addition, when the ultrasonic device is coaxially coupled with the welding gun, it is also necessary to consider the high temperature protection of the ultrasonic device and the heat dissipation of the welding gun, as well as the overall size and stiffness of the structure. The existing coaxial schemes cannot meet these requirements well. Summary of the invention

[0005] In response to the above problems, the present invention proposes a coaxial ultrasonic vibration-assisted arc fuse additive manufacturing device and method, which achieves efficient and stable additive manufacturing by coaxially coupling ultrasonic vibration with an arc welding gun and providing effective cooling and protection measures, thereby improving the mechanical properties of additively manufactured parts.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A coaxial ultrasonic vibration-assisted arc fuse additive manufacturing device comprises a multi-axis motion platform, an ultrasonic composite welding gun and a vertical reciprocating stamping structure, wherein the vertical reciprocating stamping structure is mounted on the Z-axis of the multi-axis motion platform and connected to the ultrasonic composite welding gun, wherein the ultrasonic composite welding gun comprises a coaxially coupled ultrasonic vibration pressure head and an arc welding gun, wherein the ultrasonic vibration pressure head is connected to an ultrasonic transducer, and is in a cylindrical structure, wherein an oblique opening is arranged on the side wall, wherein a conductive nozzle and welding wire of the arc welding gun enter the ultrasonic vibration pressure head from the oblique opening and are coaxially arranged with the ultrasonic vibration pressure head, wherein an insulating sleeve is arranged between the ultrasonic vibration pressure head and the conductive nozzle, and a water cooling circulation channel is arranged on the ultrasonic vibration pressure head.

[0007] Furthermore, the vertical reciprocating punching structure is connected above the ultrasonic composite welding gun and can perform up and down reciprocating motion, and the up and down reciprocating motion has a frequency of 1-50 Hz and an amplitude of 0.5-3 mm.

[0008] Furthermore, the distance between the inner wall of the ultrasonic vibration pressure head and the center of the arc is r, and the distance between the cooling edge of the molten pool on the additive manufacturing sample and the center of the arc is d, which must satisfy r≥d+2mm.

[0009] Furthermore, the outer diameter of the bottom of the ultrasonic vibration pressure head is 40-50 mm, and the inner diameter is 30-40 mm.

[0010] Furthermore, the frequency range of the ultrasonic vibration indenter is 18-22 kHz, and the amplitude range is 3-8 μm.

[0011] Furthermore, an inert gas protection gas circuit is provided inside the ultrasonic composite welding gun, and the inert gas is passed into the interior of the insulating sleeve through the inert gas protection gas circuit to form gas protection.

[0012] Furthermore, the arc welding gun adopts a MIG welding gun as an arc heat source.

[0013] Furthermore, a water cooling channel is provided inside the pressure head, and the water cooling channel connects the water inlet and the water outlet to form the water cooling circulation channel.

[0014] Furthermore, the insulating sleeve is made of ceramic material.

[0015] A coaxial ultrasonic vibration assisted arc fuse additive manufacturing method, using the above device for additive manufacturing, comprises the following steps: (1) Start the welding gun and heat the welding wire through the arc to form a molten pool with a diameter of about 12-16 mm; (2) Start the ultrasonic welding gun and the vertical reciprocating punching structure, so that the ultrasonic vibration pressure head is in close contact with the newly solidified metal, transmit the ultrasonic vibration energy, and the vertical reciprocating punching structure drives the ultrasonic composite welding gun to move up and down to prevent the welding gun head from bonding with the high-temperature metal; (3) Control the three-dimensional motion mechanism of the multi-axis motion platform to move along a preset path for additive manufacturing. The temperature of the welding gun head and the additive parts is ensured to be stable and oxidation is prevented through cooling channels and gas protection.

[0016] Beneficial effects: 1. The present invention solves the directionality and sequentiality problems of the traditional side-axis structure by coaxially coupling the ultrasonic vibration and the arc welding gun. It can perform additive manufacturing in any direction and is suitable for additive manufacturing of complex paths. It has a high degree of automation and can realize fully automatic additive manufacturing in combination with a three-dimensional motion mechanism, thereby improving production efficiency and forming quality.

[0017] 2. The present invention fully considers the problems existing in the existing coaxial ultrasonic assisted additive manufacturing devices. The ultrasonic vibration pressure head is designed to be a cylindrical structure. The welding wire and the conductive nozzle of the arc welding gun are inserted from the side and arranged coaxially with the ultrasonic vibration pressure head to form an ultrasonic composite welding gun structure. The structure is compact and small in size. The ultrasonic vibration effectively acts around the molten pool through the annular pressure head and does not directly act on the molten pool. An insulating sleeve is arranged between the pressure head and the conductive nozzle to avoid electrical interference while ensuring efficient transmission of ultrasonic vibration energy. Grain refinement is achieved through ultrasonic micro-forging.

[0018] 3. The present invention realizes the coaxial coupling of ultrasonic vibration and arc welding gun, and designs a water cooling and gas protection system in the ultrasonic composite welding gun. The insulating sleeve and inert gas are used to form a gas protection cover for the welding gun head. The water cooling pipeline is designed inside the annular pressure head, which can effectively reduce the temperature of the welding gun head and the additive parts to prevent oxidation and adhesion. At the same time, it can also perform auxiliary forced cooling on the additive metal to improve the material forming accuracy.

[0019] 4. The present invention connects a vertical reciprocating punching structure above the ultrasonic composite welding gun, which drives the ultrasonic composite welding gun to reciprocate up and down through mechanical up and down reciprocating motion, thereby preventing the composite welding gun head from adhering to or colliding with the newly solidified high-temperature metal, thereby avoiding deformation of the welding gun and ensuring the stability of the additive manufacturing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall structural diagram of the present invention; Figure 2 A front view structural schematic diagram of the present invention; Figure 3 Schematic diagram of the internal structure of the ultrasonic composite welding gun of the present invention.

[0021] Figure numerals: 1. Multi-axis motion platform; 2. Vertical reciprocating stamping structure, 2-1. Clamp; 3. Ultrasonic composite welding gun, 3-1. Ultrasonic transducer; 3-2. Ultrasonic vibration pressure head; 3-3. Insulating sleeve; 3-4. Water cooling circulation channel; 3-5. Inert gas shielding gas circuit; 3-6. Welding wire, 3-7. Arc; 4. Ultrasonic excitation power supply; 5. MIG arc welding power supply; 6 Additive manufacturing specimen; 6-1. Molten pool, 6-2. Solidified metal, 7. Fixed base plate. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] The present invention proposes a coaxial ultrasonic-assisted arc additive manufacturing device, designs a composite welding gun with coaxial coupling of an ultrasonic welding gun and an arc welding gun, and combines a three-dimensional motion mechanism to realize automatic additive manufacturing. Figure 1 As shown, the additive manufacturing device mainly includes the following structures: a multi-axis motion platform 1; a vertical reciprocating stamping structure 2; an ultrasonic composite welding gun 3; an ultrasonic excitation power supply 4; a MIG arc welding power supply 5; an additive manufacturing sample 6; and a fixed base plate 7; wherein the multi-axis motion platform 1 is provided with a three-dimensional motion mechanism, including an X-axis, a Y-axis and a Z-axis, the fixed base plate 7 is arranged on the Y-axis, an additive manufacturing sample 6 is placed on the fixed base plate 7, the vertical reciprocating stamping structure 2 and the ultrasonic composite welding gun 3 are arranged on the Z-axis, and are connected to the ultrasonic excitation power supply 4 and the MIG arc welding power supply 5, and combined with the movement of the three-dimensional motion mechanism, additive manufacturing is performed according to the set path.

[0024] The ultrasonic composite welding gun 3 of the present invention comprises a coaxially coupled arc welding gun and an ultrasonic welding gun. The arc welding gun adopts a MIG welding gun as an arc heat source, delivers welding wire through a conductive nozzle and provides the heat and material required for melting the metal; the ultrasonic welding gun part is designed with an annular ultrasonic vibration pressure head, which is hollow inside and coaxially arranged with the arc welding gun.

[0025] like Figure 2-3 As shown, the ultrasonic composite welding gun 3 includes: an ultrasonic transducer 3-1, an ultrasonic vibration pressure head 3-2, an insulating sleeve 3-3, a water-cooling circulation channel 3-4, an inert gas protection gas circuit 3-5, a welding wire 3-6 and an arc 3-7; specifically, the ultrasonic vibration pressure head 3-2 is a cylindrical structure, the ultrasonic vibration pressure head 3-2 is connected to the ultrasonic transducer 3-1 above, and an oblique opening is provided in the middle of the side, and the welding wire 3-6 and the conductive nozzle of the MIG welding gun enter from the oblique opening on the side, and then extend downward to maintain coaxiality with the cylindrical structure, ensuring coaxial coupling of the ultrasonic welding gun and the arc welding gun.

[0026] To prevent electrical interference, an insulating sleeve 3-3 is provided between the ultrasonic vibration pressure head 3-2 and the conductive nozzle of the arc welding gun. The insulating sleeve 3-3 is made of ceramic material with a wall thickness of about 2 mm. The insulating sleeve 3-3 is connected to the inert gas protection gas circuit 3-5 to form gas protection for the internal welding wire 3-6 and the conductive nozzle, effectively isolating the arc 3-7 and the ultrasonic vibration pressure head 3-2, and ensuring the efficient transmission of ultrasonic vibration energy.

[0027] A water cooling pipeline is provided in the annular inner wall of the ultrasonic vibration pressure head 3-2, connecting the water inlet and the water outlet to form a water cooling circulation channel 3-4. During additive manufacturing, the water cooling circulation channel 3-4 can cool the ultrasonic vibration pressure head 3-2, effectively reduce the temperature of the composite welding gun head, and further reduce the temperature of the additive part through contact heat conduction, thereby further refining the grains.

[0028] The ultrasonic vibration head 3-2 needs to have sufficient rigidity to avoid deformation or damage during the transmission of ultrasonic vibration. Usually, the ultrasonic vibration head 3-2 has a wall thickness of about 10 mm, a bottom outer diameter of 40-50 mm, and an inner diameter of 30-40 mm. Figure 3 As shown, the additive manufacturing sample 6 includes a molten pool 6-1 and a solidified metal 6-2; the inner wall of the annular ultrasonic vibration press head 3-2 is r away from the center of the arc 3-7, and the cooling edge of the molten pool 6-1 is d away from the center of the arc 3-7. The design requires r≥d+2mm, which can effectively apply ultrasonic vibration to a position close to the molten pool 6-1, thereby improving the effect of vibration in refining grains, and at the same time avoiding direct action between the ultrasonic vibration press head 3-2 and the molten pool 6-1 to produce large splashes.

[0029] Through the above-mentioned coaxial coupling design, the ultrasonic welding gun pressure head and the MIG welding gun copper nozzle are coaxially arranged, which solves the directionality and sequentiality problems of the traditional off-axis structure, so that the composite welding gun can perform additive manufacturing in any direction. The cylindrical ultrasonic vibration pressure head has a stable structure and high ultrasonic vibration transmission efficiency, which can better play a role in grain refinement and micro-forging for additive manufacturing.

[0030] The ultrasonic composite welding gun applies mechanical disturbances during the solidification process of the molten pool through ultrasonic vibration, promotes the formation of crystal nuclei, and refines the grains. According to tests, when titanium alloy additive manufacturing is carried out, the titanium alloy grains can be refined from the original 200-1000μm to about 50μm, significantly improving the tensile strength (10-20%); ultrasonic vibration can also perform micro-forging on high-temperature newly solidified metals, further improving the material strength and the forming surface accuracy.

[0031] Furthermore, the present invention connects a set of vertical reciprocating stamping structures 2 above the ultrasonic composite welding gun 3, and the vertical reciprocating stamping structure 2 is fixed on the fixture 2-1, and the ultrasonic composite welding gun 3 is connected below. The vertical reciprocating stamping structure 2 can reciprocate up and down along the Z axis, with a vibration frequency of 1-50Hz and an amplitude of 0.5-3mm. The ultrasonic composite welding gun is driven up and down by mechanical up and down reciprocating motion to prevent the head of the ultrasonic composite welding gun 3 from bonding or colliding with the newly solidified high-temperature metal, thereby avoiding deformation of the welding gun and ensuring the stability of the additive manufacturing process. At the same time, the structural design can directly apply the energy of ultrasonic vibration to the molten pool at the closest distance, so as to better achieve the effect of grain refinement. In addition, the circulating water-cooled ultrasonic vibration composite welding gun can further quickly cool the additive parts, thereby further achieving the effect of grain refinement.

[0032] The entire ultrasonic composite welding gun 3 is installed on a three-dimensional motion mechanism, which can automatically adjust the position and direction according to the additive manufacturing process to achieve additive manufacturing of complex paths. During manufacturing, the MIG welding gun conveys the welding wire 3-6 through the conductive nozzle, and the arc 3-7 heats the welding wire 3-6 to melt it and form a molten pool 6-1; the ultrasonic vibration pressure head 3-2 is in close contact with the newly solidified metal, and transmits the ultrasonic vibration energy to the additive part; at the same time, the vertical reciprocating stamping structure 2 vibrates up and down to prevent the welding gun head from adhering to the high-temperature metal, ensuring the continuous and stable additive process. During the solidification process of the molten pool 6-1, ultrasonic vibration plays a role in refining grains and micro-forging, improving material properties; the cooling flow channel and gas protection system ensure the temperature stability of the welding gun head and the additive part, and prevent oxidation.

[0033] The coaxial ultrasonic-assisted arc additive manufacturing device described in the present invention has at least the following advantages: 1. Grain refinement: Ultrasonic vibration is used to significantly refine the grains, thereby improving the tensile strength and fatigue performance of the additive parts; 2. Micro-forging effect: Ultrasonic vibration is used to perform micro-forging on the freshly solidified metal, thereby further improving the material strength and surface accuracy; 3. Directionality optimization: The coaxial coupling design solves the directionality and sequentiality problems of the traditional paraxial structure, and is suitable for complex path additive manufacturing; 4. Cooling protection: The water cooling and gas protection system effectively reduces the temperature of the welding gun head and the additive parts to prevent oxidation and bonding, and can also assist in forced cooling of the additive metal to improve the material forming accuracy; 5. High degree of automation: Combined with a three-dimensional motion mechanism, fully automatic additive manufacturing is achieved, thereby improving production efficiency and forming quality.

[0034] Example 1 1. Assembly of composite welding gun MIG welding gun: Use aluminum alloy welding wire 3-6 with a diameter of 1.2 mm; the inner diameter of the MIG welding gun conductive tip is 1.4 mm to ensure smooth feeding of welding wire 3-6. The welding current is set to 150A and the welding voltage is 20V to ensure stable formation of molten pool 6-1.

[0035] Ultrasonic welding gun parts: The ultrasonic transducer 3-1 adopts a piezoelectric ceramic transducer with a frequency of 20kHz and a power of 2kW. The ultrasonic vibration pressure head 3-2 is a ring structure with an outer diameter of 45mm and an inner diameter of 35mm at the bottom, and is coaxially arranged with the copper nozzle of the MIG welding gun; an oblique opening is provided in the middle of the ultrasonic vibration pressure head 3-2 for the side entry of the welding wire 3-6 and the conductive nozzle to ensure the coaxial coupling of the two. A water-cooling flow channel 3-4 is designed inside the ultrasonic vibration pressure head 3-2, with a flow channel diameter of 4mm and a cooling water flow rate of 5L / min. The inert gas protection gas circuit 3-5 adopts argon gas with a flow rate of 15L / min to prevent oxidation of the molten pool 6-1. Insulation material: A ceramic insulating sleeve 3-3 with a thickness of 2mm is installed between the ultrasonic vibration pressure head 3-2 and the copper nozzle of the MIG welding gun to avoid electrical interference.

[0036] 2. Additive Manufacturing Process The MIG welding gun is started, and the welding wire 3-6 is heated by the electric arc 3-7 to form a molten pool 6-1, and the diameter of the molten pool 6-1 is about 12-16 mm.

[0037] At the same time, the ultrasonic welding gun is started to make the ultrasonic vibration pressure head 3-2 closely contact with the newly solidified metal to transmit ultrasonic vibration energy; the ultrasonic vibration frequency is set to 20kHz and the amplitude is 5μm. The vertical reciprocating punching structure 2 drives the composite welding gun to move up and down with a frequency of 20Hz and an amplitude of 1mm to prevent the welding gun head from bonding with the high-temperature metal.

[0038] The three-dimensional motion mechanism is controlled to perform additive manufacturing along a preset path: the movement speed is 5 mm / s and the layer thickness is 1 mm until the manufacturing is completed.

[0039] 3. Additive manufacturing parameters According to the characteristics of aluminum alloy, the ultrasonic vibration parameters are adjusted to a frequency range of 18-22kHz and an amplitude range of 3-8μm. Reciprocating stamping structural parameters: frequency range of 10-30Hz, amplitude range of 1-2mm.

[0040] The cooling water flow rate range is 4-6L / min, ensuring that the temperature of the welding gun tip is lower than 80°C. The inert gas protection gas circuit 3-5 is opened to ensure that the molten pool 6-1 and the surface of the newly solidified metal are not oxidized.

[0041] 4. Test Results After testing, the grain size of aluminum alloy additive parts was refined from the original 50μm to about 10μm, and the tensile strength increased by about 15% to 320MPa.

[0042] It can be seen that the coaxial ultrasonic vibration-assisted arc fuse additive manufacturing device and method designed in the present invention effectively solve the problems of coarse grains, poor surface accuracy, and directional limitations in traditional additive manufacturing. The ultrasonic composite welding gun adopts a nested design to achieve coaxial coupling while ensuring that the functions of the ultrasonic vibration and the arc welding gun do not interfere with each other. It has a compact structure, high rigidity, good heat dissipation, and high ultrasonic vibration transmission efficiency, and has important industrial application value.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A coaxial ultrasonic vibration assisted arc fuse additive manufacturing device, characterized in that: The invention comprises a multi-axis motion platform (1), an ultrasonic composite welding gun (3) and a vertical reciprocating punching structure (2). The vertical reciprocating punching structure (2) is mounted on the Z axis of the multi-axis motion platform (1) and connected to the ultrasonic composite welding gun (3). The ultrasonic composite welding gun (3) comprises a coaxially coupled ultrasonic vibration pressure head (3-2) and an arc welding gun. The ultrasonic vibration pressure head (3-2) is connected to an ultrasonic transducer (3-1) and is in a cylindrical structure. An oblique opening is provided on the side wall. A conductive nozzle and a welding wire (3-6) of the arc welding gun enter the ultrasonic vibration pressure head (3-2) from the oblique opening and are arranged coaxially with the ultrasonic vibration pressure head (3-2). An insulating sleeve (3-3) is provided between the ultrasonic vibration pressure head (3-2) and the conductive nozzle. A water cooling circulation channel (3-4) is provided on the ultrasonic vibration pressure head (3-2).

2. A coaxial ultrasonic vibration assisted arc fuse additive manufacturing device according to claim 1, characterized in that: The vertical reciprocating punching structure (2) is connected above the ultrasonic composite welding gun (3) and is capable of performing up and down reciprocating motion, wherein the frequency of the up and down reciprocating motion is 1-50 Hz and the amplitude is 0.5-3 mm.

3. The coaxial ultrasonic vibration assisted arc fuse additive manufacturing device according to claim 1, characterized in that: The distance between the inner wall of the ultrasonic vibration pressure head (3-2) and the center of the arc (3-7) is r, and the distance between the cooling edge of the molten pool (6-1) on the additive manufacturing sample (6) and the center of the arc (3-7) is d, which must satisfy r≥d+2mm.

4. The coaxial ultrasonic vibration assisted arc fuse additive manufacturing device according to claim 3, characterized in that: The outer diameter of the bottom of the ultrasonic vibration pressure head (3-2) is 40-50 mm, and the inner diameter is 30-40 mm.

5. The coaxial ultrasonic vibration assisted arc fuse additive manufacturing device according to claim 1, characterized in that: The frequency range of the ultrasonic vibration indenter (3-2) is 18-22kHz, and the amplitude range is 3-8μm.

6. The coaxial ultrasonic vibration assisted arc fuse additive manufacturing device according to claim 1, characterized in that: An inert gas protection gas circuit (3-5) is provided inside the ultrasonic composite welding gun (3), and the inert gas is passed into the interior of the insulating sleeve (3-3) through the inert gas protection gas circuit (3-5) to form gas protection.

7. A coaxial ultrasonic vibration assisted arc fuse additive manufacturing device according to claim 6, characterized in that: The arc welding gun adopts a MIG welding gun as an arc heat source.

8. The coaxial ultrasonic vibration assisted arc fuse additive manufacturing device according to claim 1, characterized in that: A water cooling channel is provided inside the pressure head, and the water cooling channel connects the water inlet and the water outlet to form the water cooling circulation channel (3-4).

9. The coaxial ultrasonic vibration assisted arc fuse additive manufacturing device according to claim 1, characterized in that: The insulating sleeve (3-3) is made of ceramic material.

10. A coaxial ultrasonic vibration assisted arc fuse additive manufacturing method, characterized in that: Using the additive manufacturing device according to any one of claims 1 to 9 to perform additive manufacturing comprises the following steps: (1) starting the welding gun, heating the welding wire (3-6) by the electric arc (3-7) to form a molten pool (6-1), wherein the diameter of the molten pool (6-1) is about 12-16 mm; (2) starting the ultrasonic welding gun and the vertical reciprocating punching structure (2), so that the ultrasonic vibration pressure head (3-2) is in close contact with the newly solidified metal, transmitting ultrasonic vibration energy, and the vertical reciprocating punching structure (2) drives the ultrasonic composite welding gun (3) to move up and down, so as to prevent the welding gun head from adhering to the high-temperature metal; (3) Control the three-dimensional motion mechanism of the multi-axis motion platform (1) to move along a preset path for additive manufacturing, and ensure the temperature stability of the welding gun head and the additive parts through cooling channels and gas protection, and prevent oxidation.

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