Laser wire powder cooperation and electric arc composite additive manufacturing device and method

Abstract

The invention provides a laser wire powder cooperation and electric arc composite additive manufacturing device and method.The laser wire powder cooperation and electric arc composite additive manufacturing device comprises a plurality of printing areas, connecting areas and a printing module, the multiple printing areas are continuously arranged, each connecting area is arranged between every two adjacent printing areas, and each connecting area is provided with a plurality of first connecting areas and second connecting areas; the corresponding first connecting areas and second connecting areas are arranged in an overlapping manner; the printing modules and the printing area are oppositely arranged, the printing modules move along a preset printing path and print and form the metal component, the preset printing path passes through the printing area and the first connecting area or the printing area and the second connecting area, one-time forming of the metal structural component is achieved, additive connection and performance weak areas are avoided, and the product quality is improved. The connecting strength of the metal component is enhanced, and the forming efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of printing technology, and in particular to a laser silk powder collaborative and arc composite additive manufacturing device and method. Background Art

[0002] The level of development in fields such as aerospace, shipbuilding and ocean is an important consideration for a country's comprehensive strength, and componentization and integration are an inevitable trend in their development. Additive manufacturing is an important technology that is expected to facilitate their realization. However, traditional additive manufacturing technology is gradually showing signs of fatigue in the face of increasingly complex components. Low efficiency and difficulty in one-time forming are key difficulties that need to be overcome as a priority.

[0003] The laser powder feeding additive manufacturing device and powder flow control method disclosed in the publication number CN110052606A, wherein the laser powder feeding additive manufacturing device includes a powder feeding nozzle for ejecting powder flow, a powder feeder connected to the powder feeding nozzle, a powder flow controller and a monitoring mechanism, the monitoring mechanism includes a light source and an illumination sensor respectively arranged on both sides of the powder flow and arranged oppositely, the light source emits a light beam to the powder flow, the illumination sensor is electrically connected to the powder flow controller for receiving the light beam passing through the powder flow and converting the light signal into an electrical signal and sending the electrical signal to the powder flow controller, the powder flow controller is electrically connected to the powder feeder for receiving the electrical signal and adjusting the powder feeding speed of the powder feeder according to the electrical signal. The change of the powder feeding speed is reflected by the change of the voltage signal, and the powder flow controller adjusts and controls the powder feeding speed of the powder feeder according to the change of the voltage signal, thereby realizing long-term monitoring of the powder flow and adjusting and controlling the powder feeding speed of the powder feeder.

[0004] At present, when the additive manufacturing process is used to form metal components larger than 3 meters, it is necessary to print them multiple times and then connect them together. This method is not only time-consuming and inefficient, but also leads to the appearance of weak performance areas that are prone to failure, significantly reducing the structural strength and serviceability of the metal components. Summary of the invention

[0005] In view of this, the present invention proposes a laser silk powder collaborative and arc composite additive manufacturing device and method to achieve one-time forming of metal structural parts, avoid the appearance of additive connections and weak performance areas, enhance the connection strength of metal components, and improve forming efficiency.

[0006] The technical solution of the present invention is implemented as follows: In the first aspect, the present invention provides a laser silk powder collaborative and arc composite additive manufacturing device, comprising a plurality of printing areas, a connection area and a printing module, wherein:

[0007] The plurality of printing areas are arranged continuously, and each connecting area is arranged between two adjacent printing areas, the connecting area has a plurality of first connecting areas and second connecting areas, and the corresponding first connecting areas are arranged to overlap with the second connecting areas;

[0008] Each printing module is arranged opposite to the printing area. The printing module moves along a preset printing path and prints to form a metal component. The preset printing path passes through the printing area and the first connecting area or the printing area and the second connecting area.

[0009] On the basis of the above technical solution, preferably, the number of the printing areas is two, and the two printing modules are respectively moved toward the connecting area side along the starting positions of their corresponding printing area boundaries for printing and forming, and the starting positions of the boundaries of the two printing modules are symmetrically arranged with respect to the central axis of the connecting area.

[0010] On the basis of the above technical solution, preferably, the number of the printing areas is at least three, the printing module located at the head end moves along the starting position of its corresponding printing area boundary toward the adjacent connection area side for printing and forming, and the two adjacent printing modules away from the head end take the central axis of the connection area between them as the starting position and move toward the connection area sides on the adjacent sides for printing and forming.

[0011] On the basis of the above technical solution, preferably, the printing path of each printing module includes a plurality of bending segments, the plurality of bending segments are connected end to end, and the corners of each bending segment are arranged at right angles.

[0012] On the basis of the above technical solution, preferably, the printing module moves along the lateral direction of the printing area to the connecting area, and moves along the longitudinal direction thereof at the connecting area by a distance of the connecting area to form a bending section.

[0013] On the basis of the above technical solution, preferably, an auxiliary module is further included, wherein the auxiliary module is arranged on one side of the printing module, and is used to remelt and spread the overlapping area of ​​the first connection area and the second connection area.

[0014] On the basis of the above technical solution, preferably, the longitudinal widths of the connecting area and the printing area are equal, and the end surfaces of the connecting area and the printing area are arranged in the same plane.

[0015] On the basis of the above technical scheme, preferably, the printing module includes a laser coaxial silk and powder co-feeding main print head, a side-axis multi-wire co-feeding auxiliary print head and a side-axis multi-channel powder feeding auxiliary print head, wherein the laser coaxial silk and powder co-feeding main print head is arranged opposite to the printing area, and is used to make the laser beam and silk powder coaxially and synchronously transported, and the side-axis multi-wire co-feeding auxiliary print head is arranged on one side of the laser coaxial silk and powder co-feeding main print head, and is used to transport multiple wires; the side-axis multi-channel powder feeding auxiliary print head is arranged on one side of the laser coaxial silk and powder co-feeding main print head, and is symmetrically arranged with the side-axis multi-wire co-feeding auxiliary print head, and is used to transport powder materials.

[0016] In a second aspect, the present invention further provides a silk powder composite laser additive manufacturing method for a metal component, using a laser silk powder collaborative and arc composite additive manufacturing device, the method comprising:

[0017] S1, cleaning, drying and filling raw materials, wherein the raw materials include wire and powder, the wire diameter is 1.2-3.0 mm, and the powder particle size is 50-300 μm;

[0018] S2, placing the substrate into the printing chamber, washing the chamber to make the chamber pressure meet the requirements of 1-10mbar, water content of 50-100ppm, and oxygen content of 500-1000ppm;

[0019] S3, setting the printing parameters of each printing module;

[0020] If there are two printing areas, the two printing modules move toward the connection area along the starting positions of the boundaries of their respective printing areas to print. There is a time difference of 1-5s between the two printing modules moving toward each other, and the printing module moves one step after printing into the connection area, and then moves horizontally to print.

[0021] If the number of printing areas is at least three, the printing module at the head end moves along the starting position of the corresponding printing area boundary toward the adjacent connection area side for printing, and the central axis of the connection area between two adjacent printing modules away from the head end is the starting position and moves toward the adjacent connection area sides for printing;

[0022] S4, the auxiliary module remelts and spreads the overlapping area of ​​the first connection area and the second connection area so that the connection area is at the same height as the printing area;

[0023] S5, when the printing path of each printing module moves to the end point, the metal component is formed, and after the metal component is cooled, the cabin is opened for sampling.

[0024] On the basis of the above technical scheme, preferably, the laser power of the printing parameters is 4000-30000W; the powder feeding speed is 20-60cm3 / min; the wire feeding speed is 1-10m / min; the spot diameter is 0.8-2mm; the defocus amount is 80-100mm; the overlap rate is 40-60%; the lifting amount is 2-5mm; the hot wire current is 10-70A; the auxiliary laser is 300-1500W, and the deposition current is 50-300A.

[0025] The laser wire powder synergy and arc composite additive manufacturing device and method of the present invention have the following beneficial effects compared with the prior art:

[0026] (1) By setting a plurality of continuously arranged printing areas, the manufacturing process can be carried out continuously, and each printing module is relatively independent and does not interfere with each other but works in coordination, and the connection area is arranged between two adjacent printing areas, and a plurality of overlapping first connection areas and second connection areas are arranged therein. The overlapping design ensures the continuity and uniformity of the forming layer when transitioning between the printing areas, enhances the strength of the connection area, realizes the integrated rapid forming of the metal structural parts, and thus improves the efficiency and quality of the printing of the metal parts;

[0027] (2) Printing is performed according to the corresponding printing paths according to the number of printing areas, so that two adjacent printing paths are symmetrical along the central axis of the connecting area, effectively reducing the performance difference caused by inconsistent printing paths, thereby improving the uniformity and consistency of the entire metal component;

[0028] (3) The thickened overlapped part is remelted and spread out through the auxiliary module, so that the overlapped part is finally made equal in height to the rest of the area, thus ensuring the continuity and smoothness of the printing path, and improving the printing quality and the stability of the joint structure;

[0029] (4) Through the cooperation of the laser coaxial silk-powder co-feeding main print head, the side-axis multi-wire co-feeding auxiliary print head and the side-axis multi-channel powder feeding auxiliary print head set in the printing module, silk-powder co-feeding can be used; multiple feeding methods such as coaxial multi-wire co-feeding, side-axis multi-wire co-feeding, coaxial multi-channel powder feeding, and side-axis multi-channel powder feeding can be coupled and the forming material can be quickly filled in by fast scanning. Moreover, the multiple feeding methods can be dynamically started and paused according to the actual forming needs. Fast scanning can ensure the rapid forming of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic top view of the structure of the laser silk powder collaborative and arc composite additive manufacturing device of the present invention;

[0032] Figure 2 It is a schematic front view of the structure of the laser silk powder coordinated and arc composite additive manufacturing device of the present invention;

[0033] Figure 3 It is a schematic diagram of the printing path of the first embodiment of the laser silk powder collaborative and arc composite additive manufacturing device and method of the present invention;

[0034] Figure 4 It is a schematic diagram of the printing path of the second embodiment of the laser silk powder coordinated and arc composite additive manufacturing device and method of the present invention;

[0035] Figure 5 The present invention is a flow chart of the laser wire powder collaborative and arc composite additive manufacturing method. DETAILED DESCRIPTION

[0036] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The existing additive printing technology for metal components has the following problems:

[0038] Low process efficiency: The current metal deposition efficiency of laser additive manufacturing is 230cm 3 / h, it often takes more than 40 days to form a structure larger than 3m, and the production time is extremely long;

[0039] One-time forming is difficult: The existing process solutions for additive manufacturing of metal components are often limited by efficiency and adopt the method of separate printing and joint connection. This will introduce additive connection areas into the overall components. This area is usually a weak area in performance and a high-risk area for component failure.

[0040] like Figure 1-5 As shown, a laser silk powder collaborative and arc composite additive manufacturing device of the present invention includes multiple printing areas 1, connecting areas 2 and printing modules 3, wherein the multiple printing areas 1 are continuously arranged, and each connecting area 2 is arranged between two adjacent printing areas 1, and the connecting area 2 has a plurality of first connecting areas 21 and second connecting areas 22, and the corresponding first connecting areas 21 and second connecting areas 22 are overlapped; each printing module 3 is arranged opposite to the printing area 1, and the printing module 3 moves along a preset printing path and prints to form a metal component, and the preset printing path passes through the printing area 1 and the first connecting area 21 or the printing area 1 and the second connecting area 22.

[0041] It should be noted that each printing area 1 is the main working area where metal powder or metal wire is deposited and formed into metal components through laser melting. The device includes multiple printing areas 1 arranged continuously, so that the manufacturing process can be carried out continuously without frequent shutdown adjustments, which greatly improves production efficiency. Taking a general 3m-grade aviation titanium alloy component as an example, traditional additive manufacturing usually only has a 200cm 3 / h (titanium alloy deposition efficiency: 1kg / h), and this method can achieve at least 3600cm 3 / h (titanium alloy deposition efficiency > 15kg / h), which is more than 15 times higher than that of the traditional method; and the connection area 2 is arranged between two adjacent printing areas 1, and is provided with a plurality of overlapping first connection areas 21 and second connection areas 22. The overlapping design ensures the continuity and uniformity of the forming layer during the transition between the printing areas, solves the problems of poor performance of the additive connection area and major structural failure nodes, realizes the one-time forming of / super metal structural parts, and avoids the appearance of additive connection and performance weak areas; thus, the method realizes the integrated rapid forming of structural parts.

[0042] Example 1

[0043] The number of printing areas 1 in this embodiment is two, and the two printing modules 3 are respectively moved toward the connecting area 2 along the starting positions of the boundaries of their corresponding printing areas 1 for printing and forming, and the starting positions of the boundaries of the two printing modules 3 are symmetrically arranged with respect to the central axis of the connecting area 2.

[0044] It should be noted that the number of printing areas 1 in this embodiment is two, and the printing starting position of the printing module 3 is located at the corner position of the corresponding printing area 1, and the initial positions of the two printing modules 3 are on the same horizontal straight line, and the two printing modules 3 move toward each other during the printing process; starting from their respective boundary starting positions, they move horizontally to the connection area 2, and the two printing modules 3 respectively print the corresponding first connection area 21 and the second connection area 22. The overlapping part between the first connection area 21 and the second connection area 22 forms a lap area to ensure the strength and continuity of the connection area. As the reciprocating zigzag path printing proceeds, the metal powder or wire gradually melts under the irradiation of the laser and is deposited on the substrate to form the required metal component.

[0045] According to this embodiment, since the boundary starting positions of the two printing modules 3 are symmetrically arranged with respect to the central axis of the connection area 2, their printing paths within the connection area 2 are also symmetrically arranged, and the printing speeds and parameters of the two printing modules 3 are the same, thereby effectively reducing the performance differences caused by inconsistent printing paths, thereby improving the uniformity and consistency of the entire metal component.

[0046] Example 2

[0047] The number of printing areas 1 in this embodiment is at least three, and the printing module 3 located at the head end moves along the starting position of the corresponding printing area 1 boundary toward the adjacent connection area 2 for printing and forming, and the two adjacent printing modules 3 away from the head end take the central axis of the connection area 2 between them as the starting position and move toward the adjacent connection areas 2 on both sides for printing and forming.

[0048] Specifically, the number of the printing areas 1 in this embodiment is three, and the three printing areas 1 are divided into an A printing area, a B printing area, and a C printing area in sequence, wherein the printing module 3 located at the head end moves along the initial position of the boundary of the A printing area toward the side of the connection area 2 set between the A printing area and the B printing area for printing, and the initial printing positions of the two printing modules 3 corresponding to the B printing area and the C printing area are located at the central axis of the connection area 2 set between the B printing area and the C printing area, and the printing modules 3 corresponding to the B printing area and the C printing area respectively move in opposite directions, wherein the printing module 3 corresponding to the B printing area moves in the opposite direction to the printing module 3 corresponding to the A printing area, and the three printing modules 3 are on the same straight line in the horizontal direction, and the printing module 3 at the head end moves from the initial position of the boundary of the A printing area to The moving distance at the central axis of the connection area 2 is the same as the distance from the central axis of the connection area 2 set between the B printing area and the C printing area to the central axis of the connection area 2 set between the A printing area and the B printing area, and to the boundary position of the C printing area, that is, the printing module 3 corresponding to the A printing area and the printing module 3 corresponding to the B printing area move toward each other, and are correspondingly arranged along the central axis of the connection area 2 between the A printing area and the B printing area, and the printing module 3 corresponding to the B printing area moves away from the printing module 3 corresponding to the C printing area, and are correspondingly arranged along the central axis of the connection area 2 between the B printing area and the C printing area; the printing speed and parameters of each printing module 3 are the same, which ensures the balance and continuity of the printing process, while reducing the errors caused by the printing path being too long or too complicated, thereby improving the uniformity and consistency of the entire metal component.

[0049] According to Embodiment 1 and Embodiment 2, the printing path of each printing module 3 includes a plurality of bending segments 31, the plurality of bending segments 31 are connected end to end, and the corners of each bending segment are arranged at right angles.

[0050] It should be noted that, in the present embodiment, the printing path of each printing module 3 is designed to include a plurality of bending segments 31, and these bending segments 31 are connected end to end to form a complete printing track. During the printing process, each printing module 3 will move according to the preset printing path, and the laser beam will adjust its irradiation position and energy output according to the changes in the printing path, and the laser beam can realize the deflection of the laser beam by adjusting the deflection of the galvanometer, thereby ensuring that the metal powder or wire can be accurately melted and deposited on the substrate. As the printing progresses, the entire printing area 1, i.e., the connecting area 2, is scanned and printed until the metal component in the entire printing area 1 is completely formed.

[0051] In addition, the printing module 3 moves along the transverse direction of the printing area 1 to the connecting area 2 , and moves along the longitudinal direction of the connecting area 2 by a connecting area distance to form a bending section 31 .

[0052] It should be noted that after the printing module 3 moves to the overlapping part connecting the first connection area 21 and the second connection area 22, the printing module 3 is moved in the longitudinal direction by the distance of a connection area, and then the printing module 3 is moved toward the boundary of the corresponding printing area 1 for printing. Similarly, the reciprocating printing performs a comprehensive scanning and printing of the entire printing area 1 and the connection area 2.

[0053] This embodiment also includes an auxiliary module 4, wherein the auxiliary module 4 is arranged on one side of the printing module 3, and is used to remelt and spread out the overlapping area of ​​the first connection area 21 and the second connection area 22; the longitudinal width of the connection area 2 is equal to that of the printing area 1, and the end faces of the connection area 2 and the printing area 1 are arranged in the same plane.

[0054] It should be noted that when the printing modules 3 on both sides move to the connection area 2, they are connected to the first connection area 21 and the second connection area 22 of the connection area 2 respectively. There is an overlapping part between the first connection area 21 and the second connection area 22, which leads to partial overlap and thickening during printing. At the same time, the auxiliary module 4 remelts and spreads the overlapping and thickened part, and finally makes the overlapping part equal to the remaining area, thereby ensuring the continuity and smoothness of the printing path, and improving the printing quality and the stability of the connection structure.

[0055] The printing module 3 in this embodiment includes a laser coaxial silk and powder co-feeding main print head 31, a side-axis multi-wire co-feeding auxiliary print head 32 and a side-axis multi-channel powder feeding auxiliary print head 33, wherein the laser coaxial silk and powder co-feeding main print head 31 is arranged opposite to the printing area 1, and is used to make the laser beam and silk powder coaxially and synchronously transported, the side-axis multi-wire co-feeding auxiliary print head 32 is arranged on one side of the laser coaxial silk and powder co-feeding main print head 31, and is used to transport multiple silk materials; the side-axis multi-channel powder feeding auxiliary print head 33 is arranged on one side of the laser coaxial silk and powder co-feeding main print head 31, and is symmetrically arranged with the side-axis multi-wire co-feeding auxiliary print head 32, and is used to transport powder materials.

[0056] It should be noted that, through the laser coaxial wire-powder feeding main print head 31, only wire material, only powder or wire and powder can be fed simultaneously; the side-axis multi-wire feeding auxiliary print head 32 can feed multiple wires simultaneously; the side-axis multi-channel powder feeding auxiliary print head 33 can feed powder in multiple channels. Through this structure, the printing module 3 can use wire-powder feeding; multiple feeding methods such as coaxial multi-wire feeding, side-axis multi-wire feeding, coaxial multi-channel powder feeding, and side-axis multi-channel powder feeding are coupled and the forming material is quickly filled in a rapid scanning manner; and the multiple feeding methods can be dynamically started and paused according to actual forming needs, and rapid scanning can ensure rapid forming of parts.

[0057] In a second aspect, the present invention further provides a laser silk powder synergistic and arc composite additive manufacturing method, which is implemented by using the above-mentioned laser silk powder synergistic and arc composite additive manufacturing device, and is characterized in that: the method comprises:

[0058] S1, cleaning, drying and filling raw materials, wherein the raw materials include wire and powder, the wire diameter is 1.2-3.0 mm, and the powder particle size is 50-300 μm;

[0059] S2, placing the substrate into the printing chamber, washing the chamber to make the chamber pressure meet the requirements of 1-10mbar, water content of 50-100ppm, and oxygen content of 500-1000ppm;

[0060] S3, set the printing parameters of each printing module 3; the laser power of the printing parameters is 4000-30000W; the powder feeding speed is 20-60cm 3 / min; wire feeding speed is 1-10m / min; spot diameter is 0.8-2mm; defocus is 80-100mm; overlap rate is 40-60%; lift is 2-5mm; hot wire current is 10-70A; auxiliary laser is 300-1500W, and deposition current is 50-300A.

[0061] If there are two printing areas 1, the two printing modules 3 move toward the connecting area 2 along the starting positions of the boundaries of their respective printing areas 1 to print. There is a time difference of 1-5s between the two printing modules 3 moving toward each other, and the printing module 3 moves one step after printing into the connecting area 2, and then moves horizontally to print.

[0062] If the number of printing areas 1 is at least three, the printing module 3 at the head end moves along the starting position of the border of the corresponding printing area 1 toward the adjacent connection area 2 for printing, and the central axis of the connection area 2 between the two adjacent printing modules 3 away from the head end is the starting position and moves toward the adjacent connection areas 2 on both sides for printing;

[0063] S4, the auxiliary module 4 remelts and spreads the overlapping area of ​​the first connection area 21 and the second connection area 22, so that the connection area 2 is at the same height as the printing area 1;

[0064] S5, when the printing path of each printing module 3 moves to the end point, the metal component is formed, and after the metal component is cooled, the cabin is opened for sampling.

[0065] It should be noted that, first, the wire and powder raw materials are cleaned and dried to ensure the quality of the materials, and then the processed raw materials are filled into the corresponding feeding system; the substrate is placed in the printing chamber, and the chamber is air-washed to meet the forming chamber pressure of 1-10mbar, water content of 50-100ppm; oxygen content of 500-1000ppm, which effectively reduces oxidation and pollution during the printing process and improves the printing quality; during the printing process, the printing module 3 completes the printing of each part according to the preset printing path, and each printing module is relatively independent and does not interfere with each other but works together to complete the one-time forming of the structural parts.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser wire powder collaborative and arc composite additive manufacturing device and method, characterized in that: It comprises a plurality of printing areas (1), a connection area (2) and a printing module (3), wherein: A plurality of printing areas (1) are arranged in succession, and each connection area (2) is arranged between two adjacent printing areas (1), the connection area (2) having a plurality of first connection areas (21) and second connection areas (22), and the corresponding first connection areas (21) and second connection areas (22) are arranged in an overlapping manner; Each printing module (3) is arranged opposite to the printing area (1), and the printing module (3) moves along a preset printing path and prints to form a metal component, wherein the preset printing path passes through the printing area (1) and the first connecting area (21) or the printing area (1) and the second connecting area (22).

2. The laser wire powder synergistic and arc composite additive manufacturing device according to claim 1, characterized in that: The number of the printing areas (1) is two, and the two printing modules (3) are respectively moved toward the connection area (2) along the starting positions of the boundaries of their corresponding printing areas (1) to print and form, and the starting positions of the boundaries of the two printing modules (3) are symmetrically arranged with respect to the central axis of the connection area (2).

3. The laser wire powder synergistic and arc composite additive manufacturing device according to claim 1, characterized in that: The number of the printing areas (1) is at least three, the printing module (3) located at the head end moves along the starting position of the boundary of its corresponding printing area (1) toward the adjacent connection area (2) for printing, and the two adjacent printing modules (3) away from the head end move toward the adjacent connection areas (2) on both sides for printing with the central axis of the connection area (2) between them as the starting position.

4. The laser wire powder synergistic and arc composite additive manufacturing device according to claim 2 or 3, characterized in that: The printing path of each printing module (3) comprises a plurality of bending segments (31), the plurality of bending segments (31) are connected end to end, and the corners of each bending segment are arranged at right angles.

5. The laser wire powder synergistic and arc composite additive manufacturing device according to claim 4, characterized in that: The printing module (3) moves along the transverse direction of the printing area (1) to the connecting area (2), and moves along the longitudinal direction of the connecting area (2) by a connecting area distance to form a bending section (31).

6. The laser wire powder synergistic and arc composite additive manufacturing device according to claim 5, characterized in that: The auxiliary module (4) is also included, wherein the auxiliary module (4) is arranged on one side of the printing module (3), and the heat source type of the auxiliary module (4) includes a high-energy beam heat source such as a laser and an electric arc, and its main functions include: shaping, i.e. remelting and spreading the overlapping area of ​​the first connection area (21) and the second connection area (22) or shaping the main forming part; forming, i.e. providing energy as an auxiliary off-axis heat source to directly melt and form the silk / powder.

7. The laser wire powder synergistic and arc composite additive manufacturing device according to claim 5, characterized in that: The longitudinal widths of the connecting area (2) and the printing area (1) are equal, and the end surfaces of the connecting area (2) and the printing area (1) are arranged in the same plane.

8. The laser wire powder synergistic and arc composite additive manufacturing device according to claim 1, characterized in that: The printing module (3) comprises a laser coaxial silk powder co-feeding main printing head (31), a side-axis multi-filament co-feeding auxiliary printing head (32) and a side-axis multi-channel powder feeding auxiliary printing head (33), wherein the laser coaxial silk powder co-feeding main printing head (31) is arranged relative to the printing area (1) for coaxially and synchronously conveying the laser beam and silk powder, the side-axis multi-filament co-feeding auxiliary printing head (32) is arranged on one side of the laser coaxial silk powder co-feeding main printing head (31) for conveying a plurality of silk materials; the side-axis multi-channel powder feeding auxiliary printing head (33) is arranged on one side of the laser coaxial silk powder co-feeding main printing head (31) and is symmetrically arranged with the side-axis multi-filament co-feeding auxiliary printing head (32) for conveying powder materials.

9. A laser silk powder synergistic and arc composite additive manufacturing method, using the laser silk powder synergistic and arc composite additive manufacturing device according to any one of claims 1 to 8, characterized in that: The method comprises: S1, cleaning, drying and filling raw materials, wherein the raw materials include wire and powder, the wire diameter is 1.2-3.0 mm, and the powder particle size is 50-300 μm; S2, placing the substrate into the printing chamber, washing the chamber to make the chamber pressure meet the requirements of 1-10mbar, water content of 50-100ppm, and oxygen content of 500-1000ppm; S3, setting printing parameters of each printing module (3); If the number of the printing areas (1) is two, the two printing modules (3) respectively move toward the connecting area (2) along the starting positions of the boundaries of their respective printing areas (1) to print and form, and there is a time difference of 1-5 seconds between the two printing modules (3) moving toward each other, and after the printing module (3) prints into the connecting area (2), it moves one step and then moves horizontally to print; If the number of the printing areas (1) is at least three, the printing module (3) at the head end moves along the starting position of the boundary of the corresponding printing area (1) toward the adjacent connection area (2) to print and form, and the central axis of the connection area (2) between two adjacent printing modules (3) away from the head end is the starting position to move toward the adjacent connection areas (2) on both sides to print and form; S4, the auxiliary module (4) remelts and spreads the overlapping area of ​​the first connection area (21) and the second connection area (22) so that the connection area (2) and the printing area (1) are at the same height; S5, when the printing path of each printing module (3) moves to the end point, a metal component is formed, and after the metal component is cooled, the chamber is opened for sampling.

10. The laser wire powder synergistic and arc composite additive manufacturing method according to claim 9, characterized in that: The printing parameters include laser power of 4000-30000W and powder feeding speed of 20-60cm. 3 / min; wire feeding speed is 1-10m / min; spot diameter is 0.8-2mm; defocus is 80-100mm; overlap rate is 40-60%; lift is 2-5mm; hot wire current is 10-70A; auxiliary laser is 300-1500W, and deposition current is 50-300A.

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