An arc additive manufacturing method of a large aspect ratio aluminum alloy cabin body

Abstract

The application discloses an arc additive manufacturing method for a large-length-diameter-ratio aluminum alloy cabin body, and belongs to the technical field of additive manufacturing, and comprises the following steps: S1, parameter setting; S2, starting printing; S3, suspending printing and adjusting a two-axis displacement machine; S4, continuing printing; and S5, installing an auxiliary support tool, and then continuing printing until printing is completed. The movement speed, the track and the rotating speed of the displacement machine are cooperatively controlled, the two-axis displacement machine and the auxiliary support tool are cooperated, and the large-length-diameter-ratio aluminum alloy cabin body is formed and printed. The application is different from the traditional displacement machine platform horizontal placement and the gun head vertical printing. The two-axis displacement machine and the auxiliary support tool on the six-axis robot and the guide rail are cooperated with each other, the printing stability and accuracy are ensured, the problem that the length of the aluminum alloy cabin body cannot be integrally prepared due to the limited robot stroke in the traditional vertical forming is solved, and the integral forming of the large-length-diameter-ratio cabin body is realized.

Description

Technical Field

[0001] This invention relates to the field of additive manufacturing technology, specifically to an arc additive manufacturing method for a large aspect ratio aluminum alloy cabin. Background Technology

[0002] In advanced manufacturing sectors such as aerospace and shipbuilding, the demand for larger and more integrated equipment is increasing, leading to continuous upgrades in the size, structural complexity, and performance requirements of high-strength aluminum alloy components. Producing large, integrated, high-performance aluminum alloy parts using traditional casting, forging, and machining techniques requires heavy-duty casting, forging, and machining equipment, as well as large molds, making production extremely difficult. Furthermore, this method results in significant material cutting, low material utilization, long lead times, and high costs. In contrast, additive manufacturing technology achieves moldless production through layer-by-layer deposition, which greatly shortens production cycles, improves material utilization, and reduces manufacturing costs, possessing immense market value and application potential for the development of high-end equipment.

[0003] Arc additive manufacturing is an advanced digital manufacturing technology based on the principle of layer-by-layer cladding. This technology uses an electric arc generated by metal inert gas welding (MIG), tungsten inert gas welding (TIG), or plasma welding (A) as a heat source. Combined with wire feeding, and driven by a program, guided by a three-dimensional digital model, it progressively fabricates metal parts along lines, surfaces, and volumes.

[0004] In the aerospace field, typical cabin structures often follow a high length-to-diameter ratio design, as this effectively reduces the mass of the launch vehicle and minimizes air resistance. However, this design presents significant challenges during the cabin molding process. Traditional cabin manufacturing methods, such as casting, cannot be formed in one piece due to mold limitations and require segmented fabrication. However, multi-segment fabrication adds fixed locations such as flanges, further increasing weight. Furthermore, casting is typically cumbersome and inefficient. Therefore, developing a manufacturing device and method capable of integrally molding high length-to-diameter ratio aluminum alloy cabins is of paramount importance.

[0005] CN114043042A discloses a flexible arc additive manufacturing equipment, including a cabin unit, a robot unit, a positioner unit, an arc welding unit, a monitoring unit, and a central control unit. It features high integration, flexibility, scalability, and online monitoring capabilities, meeting the requirement for controllable entire forming process in arc additive manufacturing. While this equipment boasts high integration and is suitable for fabricating small-sized parts or cabins, it is difficult to fabricate large-sized parts or cabins with a large length-to-diameter ratio.

[0006] CN216990288U discloses a multi-degree-of-freedom arc-wire additive manufacturing device, including a main control cabinet, a robot module, a welding module, an atmosphere protection device, and a work platform module. The printed parts are mainly printed vertically. When the length of the printed parts is too long, the working range of the robot is limited, which limits the printing. At the same time, the stability of the printed parts in the horizontal state is poor, which makes the printing accuracy easily affected. Summary of the Invention

[0007] The technical problem to be solved by this invention is to solve the problem that the cabin cannot be integrally molded due to its excessive length, so as to realize the integral manufacturing of the cabin, improve production efficiency, and reduce production costs.

[0008] The technical solution adopted by this invention to solve the technical problem is: an arc additive manufacturing method for aluminum alloy cabins with a large aspect ratio, comprising the following steps:

[0009] S1: Set parameters for the arc additive manufacturing device used for arc additive manufacturing of the aluminum alloy cabin body. The arc additive manufacturing device includes a printing component arranged sequentially in the working area, a guide rail arranged along the length of the aluminum alloy cabin body, a two-axis positioner for mounting the aluminum alloy cabin body substrate, and an auxiliary support fixture for supporting the aluminum alloy cabin body during the printing process. The two-axis positioner is driven and connected to the guide rail. The auxiliary support fixture is detachably installed on the guide rail. The printing component is electrically connected to the two-axis positioner.

[0010] S2: The printing component begins printing the aluminum alloy cabin body on the aluminum alloy cabin body substrate, at which time the two-axis positioner is in a fixed state;

[0011] S3: After printing a certain distance, the printing component stops printing, and the two-axis positioner drives the already printed aluminum alloy cabin to move a first preset distance away from the printing component along the guide rail.

[0012] S4: After the two-axis positioner moves the first preset distance, it stops moving, and the printing component continues to print;

[0013] S5: Repeat steps S2-S4. After the printed aluminum alloy cabin body moves a second preset distance under the drive of the two-axis positioner, the printing assembly stops working. According to the length of the printed aluminum alloy cabin body at this time, an auxiliary support fixture is installed on the guide rail near the end of the aluminum alloy cabin body. The second preset distance is 2-10 times the first preset distance. After the auxiliary support fixture is installed, the printing assembly continues printing. As the length of the aluminum alloy cabin body increases, several auxiliary support fixtures are added until printing is completed.

[0014] As a preferred embodiment of the present invention, the second preset distance is 2-5 times the first preset distance.

[0015] As a preferred embodiment of the present invention, the auxiliary support fixture includes a base frame, a semi-circular seat, and several V-shaped supports. The semi-circular seat is disposed on the base frame, and the several V-shaped supports are evenly disposed on the upper surface of the semi-circular seat. The distance between the auxiliary support fixture and the two-axis positioner is 0.7 to 2 m. The support diameter of the semi-circular seat in the auxiliary support fixture ranges from 0.2 to 3 m, and the number of auxiliary support fixtures is 1 to 10.

[0016] As a preferred embodiment of the present invention, step S5 further includes the following steps:

[0017] When the auxiliary support fixture is installed on the guide rail near the end of the aluminum alloy cabin, the edge of the end of the aluminum alloy cabin protrudes from the auxiliary support fixture by a distance of 5-10cm.

[0018] As a preferred embodiment of the present invention, the printing assembly includes a heat source, a control cabinet, a computer platform, a six-axis robot, and a gas cylinder. The control cabinet is electrically connected to the heat source, the six-axis robot, the two-axis positioner, and the computer platform. The six-axis robot is equipped with a printing gun head, on which aluminum alloy wire is mounted and can be conveyed. The heat source is used to regulate the heat input and melt the conveyed aluminum alloy wire. The heat source is an electric arc heat source. The gas cylinder is used to provide protective gas to the printing gun head during the printing process. The computer platform and the control cabinet cooperate to set the working stroke of the six-axis robot and the two-axis positioner.

[0019] As a preferred embodiment of the present invention, step S2 specifically includes the following steps:

[0020] S2.1: The two-axis positioner is in a fixed state;

[0021] S2.2: According to the set parameters, the printing gun head performs single-layer or multi-layer printing on the aluminum alloy cabin substrate, and the distance between the printing gun head and the printed aluminum alloy cabin is dynamically adjusted.

[0022] As a preferred embodiment of the present invention, the printing gun head has a movement speed range of 1 to 100 mm / s, the two-axis positioner has a rotation speed range of 0.1 to 10 rpm, and the two-axis positioner has a lateral movement speed range of 0.1 to 500 mm / min along the guide rail.

[0023] As a preferred embodiment of the present invention, the aluminum alloy cabin has a diameter ranging from 0.2 to 3 m, a length ranging from 1 to 10 m, and a length-to-diameter ratio ranging from 0.3 to 50.

[0024] As a preferred embodiment of the present invention, the wire feeding speed of the aluminum alloy wire in the printing gun head is in the range of 5 to 10 m / min.

[0025] As a preferred embodiment of the present invention, the aluminum alloy wire includes 2-series, 4-series, 5-series, 6-series and 7-series aluminum alloys, and the diameter of the aluminum alloy wire is applicable in the range of 0.8 to 2.6 mm.

[0026] The beneficial effects of this invention are reflected in:

[0027] 1. Optimized Integrated Production Process: The arc additive manufacturing method of this invention achieves integrated production of aluminum alloy cabins with large aspect ratios through horizontal printing of the printing gun head and vertical placement of the positioner platform. Unlike the traditional method of vertical printing of the printing gun head and horizontal placement of the positioner, this method overcomes the limitation of traditional manufacturing methods that make it difficult to form the cabin in one go due to its excessive length. This greatly improves production efficiency and overall product performance. This integrated production not only improves manufacturing efficiency but also reduces the loss of precision and increase in weight caused by multiple forming processes, thereby ensuring the quality and performance of the cabin. At the same time, by adding auxiliary support fixtures to support the printed aluminum alloy cabin during the printing process, and cooperating with the pause of printing when the two-axis positioner is adjusting its position, the smoothness and accuracy of printing are ensured.

[0028] 2. Flexible Printing Parameter Configuration: This invention utilizes a six-axis robot and a print head to rationally configure printing parameters according to a preset path, adapting to the printing needs of different parts. This personalized parameter configuration further improves printing accuracy and consistency based on the characteristics and requirements of each part of the cabin.

[0029] 3. Precise Printing Process Control: This invention utilizes a control cabinet and computer platform to achieve precise control of the printing process. Furthermore, this automated control method reduces the operator's workload, improves production efficiency, and also increases operational safety and reduces work risks. Attached Figure Description

[0030] Figure 1 This is a front view schematic diagram of the present invention;

[0031] Figure 2 This is a schematic diagram of the two-axis positioner and other components of the present invention;

[0032] Figure 3 This is a schematic diagram illustrating the movement of the two-axis positioner as the length of the aluminum alloy cabin increases according to the present invention.

[0033] Figure 4 This is a schematic diagram of the auxiliary support tooling part of the present invention;

[0034] Figure 5 This is a schematic diagram of the V-shaped support portion of the present invention.

[0035] In the diagram: 1. Heat source; 2. Control cabinet; 3. Computer platform; 4. Six-axis robot; 5. Gas cylinder; 6. Printer head; 7. Aluminum alloy cabin; 8. Aluminum alloy cabin base plate; 9. Two-axis positioner; 10. Guide rail; 11. Auxiliary support fixture; 111. Base frame; 112. Semi-circular seat; 113. V-shaped bracket; 1131. Connecting part; 1132. V-shaped support rod; 1133. Bearing part. Detailed Implementation

[0036] The invention will now be described in further detail with reference to the accompanying drawings.

[0037] Combined with appendix Figure 1-5 As shown, an arc additive manufacturing method for a large aspect ratio aluminum alloy cabin includes a heat source 1, a control cabinet 2, a computer platform 3, a six-axis robot 4, a gas cylinder 5, a two-axis positioner 9, a guide rail 10, an auxiliary support fixture 11, a base frame 111, a semi-circular seat 112, a V-shaped bracket 113, a connecting part 1131, a V-shaped support rod 1132, and a load-bearing part 1133.

[0038] Combined with appendix Figure 1-5 As shown, an arc additive manufacturing method for a large aspect ratio aluminum alloy cabin includes the following steps:

[0039] S1: Set parameters for the arc additive manufacturing apparatus used for arc additive manufacturing of the aluminum alloy cabin body. The arc additive manufacturing apparatus includes a printing component arranged sequentially in the working area, a guide rail 10 arranged along the length of the aluminum alloy cabin body 7, a two-axis positioner 9 for mounting the aluminum alloy cabin body substrate 8, and an auxiliary support fixture 11 for supporting the aluminum alloy cabin body 7 during the printing process. The two-axis positioner 9 is driven and connected to the guide rail 10. The auxiliary support fixture 11 is detachably installed on the guide rail 10. The printing component is electrically connected to the two-axis positioner 9.

[0040] Preferably, the two-axis positioner 9 includes a base connected to the guide rail, a flipping platform disposed on the base, and a rotating platform disposed on the flipping platform. The flipping platform can drive the rotating platform to flip to the side toward the location of the printing component. The rotating platform can rotate 360°. The drive units of the flipping platform and the rotating platform are both precision stepper motors, or servo motors, to achieve precise multi-angle position control. The drive connection between the base and the guide rail 10 is achieved by using a linear drive motor, or a lead screw mechanism, or a gear and rack mechanism. Alternatively, other linear drive mechanisms can be used to achieve the purpose of linear movement of the base along the guide rail 10.

[0041] The aluminum alloy cabin base plate 8 is used to print and form the aluminum alloy cabin 7 on it. The aluminum alloy cabin base plate 8 is installed on the rotating platform and the installation method is a detachable installation method.

[0042] Specifically, the printing assembly includes a heat source 1, a control cabinet 2, a computer platform 3, a six-axis robot 4, and a gas cylinder 5. The control cabinet 2 is electrically connected to the heat source 1, the six-axis robot 4, the two-axis positioner 9, and the computer platform 3, respectively.

[0043] The six-axis robot 4 is equipped with a printing gun head 6. Preferably, the printing gun head 6 is located at the end of the robotic arm of the six-axis robot 4. The printing gun head 6 is parallel to the extension direction of the aluminum alloy cabin 7 to be printed, so as to perform lateral printing. The diameter of the aluminum alloy cabin 7 to be printed ranges from 0.2 to 3 m, the length ranges from 1 to 10 m, and the aspect ratio ranges from 0.3 to 50. Under the action of the six-axis robot 4, the movement trajectory of the printing gun head 6 includes linear, linear reciprocating, triangular oscillating, and circular oscillating types. The movement speed of the printing gun head 6 ranges from 1 to 100 mm / s.

[0044] The printing head 6 is equipped with aluminum alloy wire and can feed the aluminum alloy wire. Preferably, the printing head 6 feeds the aluminum alloy wire through a wire feeding device, which is installed on the printing head 6. The aluminum alloy wire includes 2-series, 4-series, 5-series, 6-series and 7-series aluminum alloys. The applicable diameter of the aluminum alloy wire is 0.8 to 2.6 mm, and the wire feeding speed range is 5 to 10 m / min.

[0045] The heat source 1 is used to regulate the heat input and melt the conveyed aluminum alloy wire. The heat source 1 adopts an electric arc heat source, and the heating end of the electric arc heat source is located at the printing gun head 6. The working mode of the heat source 1 includes automatic mode and semi-automatic mode to adapt to the melting and printing needs of aluminum alloy wires of different diameters.

[0046] The gas cylinder 5 is used to provide protective gas to the print head 6 during the printing process. The protective gas is an inert gas. The gas cylinder 5 is placed on the side of the six-axis robot 4.

[0047] The computer platform 3 and control cabinet 2 work together to set the working stroke of the six-axis robot 4 and the two-axis positioner 9. Under the coordinated action of the computer platform 3 and control cabinet 2, the movement speed and trajectory of the six-axis robot 4 driving the print head 6 and the rotation speed of the rotating platform in the two-axis positioner 9 are controlled. At the same time, the movement stroke of the base in the two-axis positioner 9 relative to the guide rail is adjusted. User input can also be accepted for control. With the cooperation of the computer platform 3 and control cabinet 2, the six-axis robot 4 can achieve precise control of complex three-dimensional trajectories with a repeatability accuracy of no more than 0.2mm.

[0048] S2: The printing assembly begins printing the aluminum alloy cabin 7 on the aluminum alloy cabin substrate 8, at which time the two-axis positioner 9 is in a fixed state.

[0049] Specifically:

[0050] S2.1: The two-axis positioner 9 is in a fixed state;

[0051] S2.2: According to the set parameters, the printing head 6 performs single-layer or multi-layer printing on the aluminum alloy cabin substrate 8, and the distance between the printing head 6 and the printed aluminum alloy cabin 7 is dynamically adjusted.

[0052] S3: After printing a certain distance, the printing component stops printing, and the two-axis positioner 9 drives the already printed part of the aluminum alloy cabin to move a first preset distance away from the printing component along the guide rail.

[0053] S4: After the two-axis positioner 9 moves the first preset distance, it stops moving, and the printing component continues to print;

[0054] S5: Repeat steps S2-S4. After the printed aluminum alloy cabin 7 moves a second preset distance under the drive of the two-axis positioner 9, the printing assembly stops working. According to the length of the printed aluminum alloy cabin 7 at this time, an auxiliary support fixture 11 is installed on the guide rail 10 near the end of the aluminum alloy cabin 7. The second preset distance is 2-10 times the first preset distance. After the auxiliary support fixture 11 is installed, the printing assembly continues to print. As the length of the aluminum alloy cabin 7 increases, several auxiliary support fixtures 11 are added until printing is completed.

[0055] Specifically:

[0056] The second preset distance is 2-5 times the first preset distance;

[0057] The auxiliary support fixture 11 includes a base frame 111, a semi-circular seat 112, and several V-shaped supports 113. The semi-circular seat 112 is mounted on the base frame 111, and the several V-shaped supports 113 are evenly arranged on the upper surface of the semi-circular seat 112. The distance between the auxiliary support fixture 11 and the two-axis positioner 9 is 0.7 to 2 m. The support diameter of the semi-circular seat 112 in the auxiliary support fixture 11 ranges from 0.2 to 3 m. The number of auxiliary support fixtures 11 is 1 to 10.

[0058] Specifically, the V-shaped bracket 113 includes a seat connecting part 1131, a V-shaped support rod 1132 and a bearing part 1133. The bottom end of the V-shaped support rod 1132 is movably connected to the semi-circular seat 112 through the seat connecting part 1131, and the bearing parts 1133 are installed at the two top ends of the V-shaped support rod 1132.

[0059] Furthermore, when the auxiliary support fixture 11 is installed on the guide rail 10 near the end of the aluminum alloy cabin 7, the edge of the end of the aluminum alloy cabin 7 protrudes from the auxiliary support fixture 11 by a distance of 5-10cm.

[0060] Preferably, the auxiliary support fixture 11 is detachably installed on the guide rail 10 via a guide rail connector and a buckle. The guide rail connector is pre-installed on the guide rail 10. The auxiliary support fixture 11 is connected by the guide rail connector and the buckle partially engages with the guide rail connector. By rotating the external control rod, the buckle and the guide rail connector can be locked or separated, thereby achieving the purpose of detachable installation of the auxiliary support fixture 11.

[0061] Working principle:

[0062] Taking an aluminum alloy cabin 7 with a length of 3m, a diameter of 0.5m, an aspect ratio of 6, and made of ZCL4220 as an example, arc additive manufacturing is performed. A two-axis positioner 9 is located on a guide rail 10. The aluminum alloy cabin substrate 8 is mounted on the two-axis positioner 9, specifically on its rotating platform. Additive manufacturing parameters are set via a computer platform 3. These parameters include, but are not limited to, a filament feed speed of 7.5m / min, a reciprocating linear trajectory for the print head 6, a print head 6 movement speed of 10mm / s, a rotating platform rotation speed of 0.5rpm in the two-axis positioner 9, and a base movement speed of 0.1mm / min relative to the track in the two-axis positioner 9. ZCL4220 aluminum alloy filament is loaded into the filament feed device. The initial position of the six-axis robot 4 is adjusted, and printing is performed according to the additive manufacturing parameters. Simultaneously, the computer platform 3 and control cabinet 2 are used to ensure precise operation of the six-axis robot 4 and smooth printing. During printing, the arc heat source heats the print head 6. The end of the aluminum alloy wire is melted, and then the molten aluminum alloy pool is deposited layer by layer along a preset path to form an aluminum alloy chamber 7 with a large aspect ratio. During the layer-by-layer printing process, the forming effect can be monitored in real time and the working parameters can be finely adjusted in real time. During the layer-by-layer deposition process, the heat of the aluminum alloy continuously accumulates, and the wire feed speed can be adjusted to 6.0 m / min according to the printing quality. After the length of the aluminum alloy chamber 7 exceeds 1 m, auxiliary support fixtures 11 are added. Since the length is 3 m, a total of 3 auxiliary support fixtures 11 are added. The distance between the first auxiliary support fixture 11 and the two-axis positioner 9 is 0.8m, and the distance between the remaining auxiliary support fixtures 11 is 0.8m. After the additive manufacturing is completed, the aluminum alloy cabin 7 is subjected to necessary post-processing, such as solution aging treatment and machining. The solution aging treatment is performed at a solution temperature of 540℃ for 12 hours and an aging temperature of 175℃ for 6 hours. This is to improve and optimize the performance of the cabin and finally obtain a ZCL4220 aluminum alloy cabin that meets the requirements for use.

[0063] The final mechanical properties and dimensional deviations of the components are shown in Table 1.

[0064]

[0065]

[0066] Table 1

[0067] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An arc additive manufacturing method for a large aspect ratio aluminum alloy cabin body, characterized in that: Includes the following steps: S1: Set parameters for the arc additive manufacturing device used for arc additive manufacturing of the aluminum alloy cabin body. The arc additive manufacturing device includes a printing component arranged sequentially in the working area, a guide rail arranged along the length of the aluminum alloy cabin body, a two-axis positioner for mounting the aluminum alloy cabin body substrate, and an auxiliary support fixture for supporting the aluminum alloy cabin body during the printing process. The two-axis positioner is driven and connected to the guide rail. The auxiliary support fixture is detachably installed on the guide rail. The printing component is electrically connected to the two-axis positioner. The auxiliary support fixture includes a base frame, a semi-circular seat, and several V-shaped supports. The semi-circular seat is mounted on the base frame, and the several V-shaped supports are evenly arranged on the upper surface of the semi-circular seat. The distance between the auxiliary support fixture and the two-axis positioner is 0.7~2m. The support diameter of the semi-circular seat in the auxiliary support fixture ranges from 0.2~3m. The number of auxiliary support fixtures is 1~10. The printing assembly includes a heat source, a control cabinet, a computer platform, a six-axis robot, and a gas cylinder. The control cabinet is electrically connected to the heat source, the six-axis robot, the two-axis positioner, and the computer platform. The six-axis robot is equipped with a printing gun head, which is fitted with aluminum alloy wire and can transport the aluminum alloy wire. The heat source is used to regulate the heat input and melt the transported aluminum alloy wire. The heat source is an electric arc heat source. The gas cylinder is used to provide protective gas to the printing gun head during the printing process. The computer platform and the control cabinet work together to set the working stroke of the six-axis robot and the two-axis positioner. S2: The printing component begins printing the aluminum alloy cabin body on the aluminum alloy cabin body substrate, at which time the two-axis positioner is in a fixed state; S3: After printing a certain distance, the printing component stops printing, and the two-axis positioner drives the already printed aluminum alloy cabin to move a first preset distance away from the printing component along the guide rail. S4: After the two-axis positioner moves the first preset distance, it stops moving, and the printing component continues to print; S5: Repeat steps S2-S4. After the printed aluminum alloy cabin body moves a second preset distance under the drive of the two-axis positioner, the printing assembly stops working. According to the length of the printed aluminum alloy cabin body at this time, an auxiliary support fixture is installed on the guide rail near the end of the aluminum alloy cabin body. The second preset distance is 2-10 times the first preset distance. After the auxiliary support fixture is installed, the printing assembly continues printing. As the length of the aluminum alloy cabin body increases, several auxiliary support fixtures are added until printing is completed.

2. The method for arc additive manufacturing of a large aspect ratio aluminum alloy cabin according to claim 1, characterized in that: The second preset distance is 2 to 5 times the first preset distance.

3. The method for arc additive manufacturing of a large aspect ratio aluminum alloy cabin according to claim 1, characterized in that: Step S5 further includes the following steps: When the auxiliary support fixture is installed on the guide rail near the end of the aluminum alloy cabin, the edge of the end of the aluminum alloy cabin protrudes from the auxiliary support fixture by a distance of 5-10cm.

4. The method for arc additive manufacturing of a large aspect ratio aluminum alloy cabin according to claim 1, characterized in that: Step S2 specifically includes the following steps: S2.1: The two-axis positioner is in a fixed state; S2.2: According to the set parameters, the printing gun head performs single-layer or multi-layer printing on the aluminum alloy cabin substrate, and the distance between the printing gun head and the printed aluminum alloy cabin is dynamically adjusted.

5. The method for arc additive manufacturing of a large aspect ratio aluminum alloy cabin according to claim 1, characterized in that: The printing gun head has a movement speed range of 1~100mm / s, the two-axis positioner has a rotation speed range of 0.1~10rpm, and the two-axis positioner has a movement speed range of 0.1~500mm / min along the guide rail.

6. The method for arc additive manufacturing of a large aspect ratio aluminum alloy cabin according to claim 1, characterized in that: The aluminum alloy cabin has a diameter ranging from 0.2 to 3 meters, a length ranging from 1 to 10 meters, and an aspect ratio ranging from 0.3 to 50.

7. The method for arc additive manufacturing of a large aspect ratio aluminum alloy cabin according to claim 1, characterized in that: The feed speed of the aluminum alloy wire in the printing gun head is in the range of 5~10m / min.

8. The method for arc additive manufacturing of a large aspect ratio aluminum alloy cabin according to claim 1, characterized in that: The aluminum alloy wire is made of 2-series, 4-series, 5-series, 6-series and 7-series aluminum alloys, and the diameter of the aluminum alloy wire is applicable in the range of 0.8~2.6mm.

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