A cross member composite additive manufacturing apparatus and method

Abstract

The application discloses a kind of cross member composite additive manufacturing device and method, the cross member composite additive manufacturing device includes movement module, main heat source module, shaping module, forging module and head module;The cross member composite additive manufacturing method includes: analysis cross member substrate size to replace required main heat source;First initial straight arm section laser scanning shaping auxiliary fusing / powder feeding composite additive manufacturing;First cross section stops wire feeding / powder feeding;First end straight arm section laser scanning shaping auxiliary fusing / powder feeding composite additive manufacturing;Second full range laser scanning shaping auxiliary fusing / powder feeding composite additive manufacturing;Interlayer exchange pass sequence and head-tail direction until completion manufacturing;The application can effectively solve the deformation continuity and flatness problem of composite additive manufacturing high-quality cross member.

Description

Technical Field

[0001] This invention belongs to the field of additive manufacturing technology, and specifically relates to a composite additive manufacturing device and method for cross-components. Background Technology

[0002] With the increasing demands for endurance in cutting-edge fields such as aerospace, cross-reinforcing rib structures with equal strength and weight reduction have become standard.

[0003] Additive manufacturing, based on the principle of discrete stacking, features high material utilization, short manufacturing cycles, and high complexity. It can significantly reduce the overall amount of back-end processing and has a significant advantage in the rapid manufacturing of cross-structures. Its main challenge lies in the tendency for protrusions and necking to occur at the intersections of two-way overlaps, which, after accumulating layer by layer, severely affect the forming quality. Furthermore, the introduction of multi-energy field composite enhancement further increases the difficulty of controlling the uniformity and consistency of shape at the intersections.

[0004] To address the aforementioned issues, current control strategies primarily include: (1) discontinuous crossover in the second pass, with direct stopping or parallel swinging at the crossover point to compensate for necking; (2) continuous crossover in the second pass, using current and voltage changes or visual monitoring to determine the height difference, and controlling the wire feeding speed, travel speed, and matching current to compensate for melting; (3) tangential overlapping of the arc paths at the crossover point; and (4) high-point milling. These strategies mitigate the protrusion or necking at the crossover point to some extent, but they also present problems such as manufacturing stoppages, mismatched width and height, or low efficiency, making direct application difficult to achieve synchronous deformation continuity and uniformity in multi-energy field composite additive manufacturing. Therefore, there is an urgent need to propose a novel cross-component composite additive manufacturing device and method to solve the problems existing in the current technology. Summary of the Invention

[0005] To address the shortcomings and defects of existing technologies, this invention provides a composite additive manufacturing apparatus and method for cross-components. By combining a laser-assisted heat source with synchronous scanning shaping and trajectory planning strategies, the problem of deformation continuity and flatness in high-quality cross-components manufactured by composite additive manufacturing can be effectively solved.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] This invention provides a composite additive manufacturing apparatus for cross-components, comprising a motion module, a main heat source module, a shaping module, a forging module, and a head-changing module. The motion module includes a first six-axis robotic arm and a second six-axis robotic arm. The first six-axis robotic arm has a rotatable dual pneumatic chuck at its end; the second six-axis robotic arm has a single pneumatic chuck at its end. The main heat source module includes a TiG welding system and a laser coaxial wire and powder feeding system. The TiG welding system includes a TiG power supply, a TiG welding torch, a wire guide device, a wire feeder, and a hot wire. The power supply, namely the Tig power supply, provides power to the Tig welding torch, and the Tig welding torch is connected to one end of the rotatable double pneumatic chuck; the laser coaxial wire and powder feeding system includes an additive laser, a powder feeder, a wire feeder, and an additive laser head; the positive terminal of the hot wire power supply is electrically connected to the wire guide device, and the negative terminal of the hot wire power supply is electrically connected to the cross-component substrate; the shaping module includes a shaping laser and a shaping laser head, the shaping laser head is disposed at the end of the shaping laser, and the shaping laser head is connected to the other end of the rotatable double pneumatic chuck;

[0008] The forging module includes a deformation mechanism; the deformation mechanism can be configured as a roll, ultrasonic impact bar, or laser impact head as needed. The deformation mechanism acts on the component deposition layer through contact or non-contact force, and the component deposition layer is located above the cross component substrate. The head changing module includes a changing device and a fixing device; the changing device includes a cutter head and a four-axis tooling; the fixing device includes a retaining ring and a tool holder, and the four-axis tooling is fixed to the top of the tool holder by the retaining ring; the cutter head and the four-axis tooling are mechanically connected; the cutter head is connected to the end clamp of the motion module by pneumatic suction; the four-axis tooling can drive the end main heat source head to perform three-axis translation and single-axis rotation.

[0009] According to a preferred embodiment of the present invention, the Tig welding torch or additive laser head and the shaping laser head are adjusted in relative position by a rotatable dual pneumatic chuck and a four-axis tooling to ensure that the main melting heat source and the auxiliary shaping heat source are located on the same plane, and the shaping laser head is vertical, with the angle between the main melting heat source and the shaping laser head being 30° to 40°.

[0010] According to a preferred embodiment of the present invention, the shaping laser head generates a transverse scanning continuous or pulsed laser through a galvanometer, which acts on the tail of the main heat source molten pool of the component deposition layer.

[0011] According to a preferred embodiment of the present invention, the deformation mechanism is connected to the cutter head via a single-axis tooling and is mounted on the end of the second six-axis robotic arm via a single pneumatic chuck; the single-axis tooling is equipped with a pressure sensor for detecting the reaction force received by the deformation mechanism and feeding back to the second six-axis robotic arm for motion compensation.

[0012] According to a preferred embodiment of the present invention, the additive laser head simultaneously delivers powder and metal wire to the laser molten pool area via a powder feeder and a wire feeder to achieve multi-material additive manufacturing.

[0013] The present invention also provides a method for composite additive manufacturing of cross-components, implemented using the composite additive manufacturing apparatus for cross-components described in the above embodiments, the method comprising the following steps:

[0014] Step S1: Analyze the dimensions of the cross-component substrate to replace the required main heat source;

[0015] Step S2: First initial straight arm segment laser scanning shaping assisted filament / powder feeding composite additive manufacturing;

[0016] Step S3: Stop feeding wire / powder at the first intersection section;

[0017] Step S4: Laser scanning and shaping of the first end straight arm segment to assist in the composite additive manufacturing of fused wire / powder feeding;

[0018] Step S5: Second full-range laser scanning shaping assisted filament / powder feeding composite additive manufacturing;

[0019] Step S6: Exchange the order and direction of the layers until manufacturing is complete.

[0020] According to a preferred embodiment of the present invention, the cross component substrate in step S1 is a single-channel thin-walled substrate, and the size boundary rules include: 1-3mm using laser coaxial powder feeding, 3-6mm using laser coaxial wire feeding, and 6-12mm using Tig off-axis wire feeding.

[0021] According to a preferred embodiment of the present invention, in steps S2 to S5, the laser scanning shaping auxiliary main heat source does not stop or change its parameters within the pass, the deformation mechanism moves synchronously and continuously in a suitable temperature zone behind the main heat source, and the intersection segment is calculated according to the theoretical width edge of the component without any additional extension or overlap.

[0022] Compared with the prior art, the embodiments of the present invention provide a composite additive manufacturing apparatus and method for cross-components, which have the following beneficial effects:

[0023] (1) Traditional additive manufacturing equipment often struggles to balance the coordinated operation of multiple heat sources with the high efficiency of material deposition, resulting in low additive manufacturing efficiency. This invention achieves simultaneous optimization of multiple heat sources by introducing the combined operation of the main heat source module (TIG welding system and laser coaxial wire powder delivery system) and the shaping module (shaping laser head), enabling efficient material deposition and surface shaping, while improving the manufacturing accuracy and process consistency of components.

[0024] (2) In the prior art, the deposited layer of additive manufacturing is prone to irregular shape and internal residual stress, which affects the performance of the component. The present invention innovatively combines a shaping laser and a forging module to significantly improve the flatness and stability of the deposited layer by real-time shaping and stress release, reduce cracks and deformation caused by residual stress, and significantly improve the reliability and quality of the component.

[0025] (3) In traditional additive manufacturing, the processing of complex components often requires multiple clamping and adjustments, resulting in complex processes and difficulty in ensuring accuracy. This invention, through the dual six-axis robotic arm of the motion module and the head-changing module, combined with a multi-functional chuck design, enables rapid head changing and flexible adjustment of components during the manufacturing process. This allows for the completion of multiple complex process operations at once, significantly simplifying the process flow and improving the flexibility and accuracy of processing complex components.

[0026] (4) Existing additive manufacturing equipment is usually limited to the processing capability of a single material, which restricts its application in the field of multi-material component manufacturing. The present invention realizes the synchronous feeding of powder and metal wire through a laser coaxial wire-powder feeding system, which can meet the needs of simultaneous processing of multiple materials. This capability greatly expands the application scenarios of additive manufacturing, especially in the fields of aerospace, automobile manufacturing and other high-performance components that require the combination of multiple materials, providing broader possibilities for industrial applications.

[0027] (5) The main heat source of melting and the deformation mechanism move synchronously and continuously, which ensures the consistency of thermal conditions during the forming process and improves manufacturing efficiency; the scanning laser always shapes the main heat source molten pool, avoiding necking in the cross section; the first pass in the layer stops feeding wire at the cross section, avoiding the deformation obstruction caused by the full forming of the first pass to the forming of the vertical subsequent passes, ensuring the uniformity and flatness of the deformation of the cross section, and realizing the uniformity of the microstructure and properties of the high-efficiency and high-precision composite additive manufacturing of cross components. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments or prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a flowchart of a cross-component composite additive manufacturing method provided in an embodiment of this application.

[0030] Figure 2 This is a schematic diagram of a cross-component composite additive manufacturing apparatus provided in an embodiment of this application.

[0031] Figure 3 This is a schematic diagram of a composite additive manufacturing path for cross-components provided in an embodiment of this application.

[0032] Figure 4 This is a schematic diagram of the first path of an odd-numbered layer in a cross-component composite additive manufacturing process, provided as an embodiment of this application.

[0033] Figure 5 This application provides a schematic diagram of the second path of an odd-numbered layer in a cross-component composite additive manufacturing process.

[0034] Reference numerals: First six-axis robotic arm 11, Second six-axis robotic arm 12, Tig welding torch 21, Wire guide device 22, Wire feeder 23, Hot wire power supply 24, Additive laser head 3, Shaping laser head 4, Deformation mechanism 5, Rotatable double pneumatic chuck 61, Single pneumatic chuck 62, Cutting head 71, Four-axis tooling 72, Snap ring 81, Tool holder 82, Cross component substrate 9, Component deposition layer 10. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] This invention employs a first six-axis robotic arm and a second six-axis robotic arm working in tandem. The first robotic arm is equipped with a rotatable dual pneumatic chuck at its end for mounting a TIG welding torch or additive laser head, as well as a shaping laser head, enabling flexible switching and precise alignment between the main heat source and the shaping module. The second robotic arm is equipped with a single pneumatic chuck at its end, connected to the deformation mechanism of the forging module (such as a roller or ultrasonic impact bar), for real-time application to the component deposition layer. Through the synchronous operation of the multi-axis robotic arms, additive manufacturing, shaping, and forging operations along complex paths can be achieved, ensuring processing accuracy and component surface quality.

[0037] The main heat source module combines a TiG welding system with a laser-coaxial wire-powder co-feeding system. The TiG welding torch generates high-temperature melting of the metal wire through an electric arc, and further increases the molten pool temperature with the support of a hot wire power supply, ensuring efficient fusion of the metal wire and the component substrate. The laser-coaxial wire-powder co-feeding system provides high-energy-density melting powder and metal wire through an additive laser, working in conjunction with a powder feeder and wire feeder to achieve a high-precision, multi-material deposition process in the laser molten pool area. This dual main heat source design can meet the high-efficiency manufacturing requirements of large-size components while also enabling localized high-precision material deposition.

[0038] The shaping module consists of a shaping laser and a shaping laser head. The shaping laser head generates a transversely scanning continuous or pulsed laser through a galvanometer, which acts on the tail of the molten pool of the main heat source. The shaping laser performs thermal shaping on the deposited layer, eliminating residual stress and improving the surface smoothness of the deposited layer. The relative position of the shaping laser head is adjusted by a rotatable dual pneumatic chuck and a four-axis tooling to keep it on the same plane as the main heat source, ensuring the consistency of the processing path. At the same time, the melting main heat source and the shaping laser head maintain an optimal angle of 30° to 40°, improving shaping efficiency.

[0039] The deformation mechanism of the forging module can be configured as a roll, ultrasonic impact bar, or laser impact head according to process requirements. It acts on the surface of the component's deposited layer through contact or non-contact methods to improve surface density and mechanical properties. The deformation mechanism is connected to the cutter head via a single-axis tooling and is equipped with a pressure sensor to detect the applied reaction force, providing real-time feedback to the second six-axis robotic arm for motion compensation, ensuring the stability of the deformation process. The head-changing module connects to the cutter head via pneumatic suction. The four-axis tooling drives the main heat source head to achieve three-axis translation and single-axis rotation, enabling flexible switching between heat sources and tools to meet the processing needs of complex components. Through the coordinated work of these modules, this invention achieves efficient integrated additive manufacturing, shaping, and forging operations.

[0040] Example of industrial application: Manufacturing of multi-material nozzles. A high-temperature alloy and copper alloy composite nozzle was manufactured using the device of the present invention. The equipment includes a Tig welding system, a laser coaxial wire and powder feeding system, and a shaping and forging module. The dual six-axis robotic arm of the motion module is equipped with dual pneumatic chucks and a single pneumatic chuck to ensure processing accuracy and head-changing efficiency. (1) The copper alloy substrate is initially deposited by the Tig welding system, and high-temperature alloy material is deposited on its surface by combining the laser coaxial wire and powder feeding system; (2) The deposited layer is shaped by galvanometer scanning using a shaping laser to ensure the surface flatness of the bonding part between the high-temperature alloy and the copper alloy material; (3) The contact part is strengthened by the ultrasonic impact bar of the forging module to improve the interfacial bonding performance of the composite material; (4) The position of the laser shaping head and the forging module is adjusted by the head-changing module to complete the processing of the nozzle. The test results show that the bonding strength between the high-temperature alloy and the copper alloy is significantly improved, meeting the requirements of the hot end component for thermal conductivity and high-temperature strength.

[0041] Specifically, such as Figure 2As shown in the schematic diagram, an embodiment of the present invention provides a cross-component composite additive manufacturing device, including a motion module, a main heat source module, a shaping module, a forging module, and a head-changing module. The motion module includes a first six-axis robotic arm 11 and a second six-axis robotic arm 12; the first six-axis robotic arm 11 has a rotatable double pneumatic chuck 61 mounted at its end; the second six-axis robotic arm 12 has a single pneumatic chuck 62 mounted at its end. The main heat source module includes a TiG welding system and a laser coaxial wire and powder feeding system; the TiG welding system includes a TiG power supply, a TiG welding torch 21, a wire guide device 22, a wire feeder 23, and a hot wire power supply 24; the TiG power supply provides power to the TiG welding torch 21, and the TiG welding torch 21 is connected to one end of the rotatable double pneumatic chuck 61. The laser coaxial filament and powder feeding system includes an additive laser, a powder feeder, a filament feeder 23, and an additive laser head 3; the positive terminal of the hot filament power supply 24 is electrically connected to the filament guide device 22, and the negative terminal of the hot filament power supply 24 is electrically connected to the cross-component substrate 9.

[0042] The shaping module includes a shaping laser and a shaping laser head 4. The shaping laser head 4 is located at the end of the shaping laser and is connected to the other end of a rotatable dual pneumatic chuck 61. The forging module includes a deformation mechanism 5. The deformation mechanism 5 is connected to a single pneumatic chuck 62. The deformation mechanism 5 can be configured as a roller, ultrasonic impact bar, laser impact head, etc., to act on the component deposition layer 10 through contact or non-contact force. The component deposition layer 10 is located above the cross component substrate 9. The head-changing module includes a changing device and a fixing device. The changing device includes a cutter head 71 and a four-axis tooling 72. The fixing device includes a retaining ring 81 and a tool holder 82. The four-axis tooling 72 is fixed to the top of the tool holder 82 by the retaining ring 81. The cutter head 71 and the four-axis tooling 72 are mechanically connected. The cutter head 71 is connected to the end chuck of the motion module by pneumatic suction. The four-axis tooling 72 can drive the end main heat source head to perform three-axis translation and single-axis rotation. The additive laser head 3 is connected to the four-axis tooling 72.

[0043] The Tig welding torch 21 or additive laser head 3 and shaping laser head 4 are adjusted relative to each other via a rotatable dual pneumatic chuck 61 and a four-axis tooling 72 to ensure that the main melting heat source and the auxiliary shaping heat source are on the same plane, and that the shaping laser head 4 is vertical, with the angle between the main melting heat source and the shaping laser head 4 being 30° to 40°.

[0044] In this embodiment, the shaping laser head 4 generates a transverse scanning continuous or pulsed laser through a galvanometer, which acts on the tail of the main heat source molten pool. The deformation mechanism 5 is connected to the cutter head 71 through a single-axis tooling and is mounted on the end of the second six-axis robotic arm 12 through a single pneumatic chuck 62; the single-axis tooling is equipped with a pressure sensor to detect the reaction force on the deformation mechanism 5 and provide feedback to the second six-axis robotic arm 12 for motion compensation.

[0045] According to the cross-component composite additive manufacturing apparatus in the above embodiments, the present invention also provides a cross-component composite additive manufacturing method, such as... Figure 1 As shown, the composite additive manufacturing method for the cross-component includes the following steps:

[0046] Step S1: Analyze the dimensions of the cross-component substrate to replace the required main heat source;

[0047] Step S2: First initial straight arm segment laser scanning shaping assisted filament / powder feeding composite additive manufacturing;

[0048] Step S3: Stop feeding wire / powder at the first intersection section;

[0049] Step S4: Laser scanning and shaping of the first end straight arm segment to assist in the composite additive manufacturing of fused wire / powder feeding;

[0050] Step S5: Second full-range laser scanning shaping assisted filament / powder feeding composite additive manufacturing;

[0051] Step S6: Exchange the order and direction of the layers until manufacturing is complete.

[0052] Preferably, the substrate of the cross member in step S1 is a single-pass thin-walled structure, and the size boundary rules include: 1-3mm using laser coaxial powder feeding, 3-6mm using laser coaxial wire feeding, and 6-12mm using Tig off-axis wire feeding. In steps S2 to S5, the laser scanning shaping auxiliary main heat source does not stop or change parameters within the pass, and the deformation mechanism moves synchronously and continuously in a suitable temperature zone behind the main heat source. The cross section is calculated according to the theoretical width edge of the member, without additional extension or overlap.

[0053] Example 1

[0054] Laser-fed powder composite additive manufacturing of 3mm thick 15-5PH stainless steel cross components. Length 100mm, height 10mm.

[0055] A rotatable dual pneumatic chuck 61 is used to replace the additive laser head 3 from the tool holder 82. The raw material is 15-5PH powder. The main heat source additive parameters are set as follows: laser power 1400W, travel speed 360mm / min, powder feeding speed 15g / min. The auxiliary heat source shaping parameters are set as follows: continuous laser power 800W, spot diameter 1mm, lateral symmetrical scanning amplitude 1.5mm, scanning speed 100mm / s. Deformation is performed using a roller with a diameter of 10mm, a deformation amount of 30%, and a deformation temperature of 950℃~1000℃. The position of the deformation mechanism is adjusted by feedback from an infrared thermal imager.

[0056] Manufacturing trajectory such as Figure 3 , Figure 4 and Figure 5As shown, the laser scanning shaping auxiliary main heat source does not stop or change parameters within the pass, while the deformation mechanism moves synchronously and continuously behind the main heat source. Specifically, powder feeding stops at the ab intersection segment in the first pass of odd-numbered layers, and powder feeding stops at the dc intersection segment in the first pass of even-numbered layers. Furthermore, the four intersection points a, b, c, and d are calculated based on the theoretical width edge of the component, with no additional extension or overlap.

[0057] Example 2

[0058] Tig arc-fed composite additive manufacturing of 10mm thick TC4 titanium alloy cross components. Length 100mm, height 15mm.

[0059] A rotatable dual pneumatic chuck 61 is used to change the Tig welding torch 21 from the tool holder 82. The raw material is TC4 welding wire with a diameter of 1.2mm. The main heat source additive parameters are set as follows: welding current 210A, travel speed 300mm / min, wire feed speed 4m / min, and hot wire current 100A. The auxiliary heat source shaping parameters are set as follows: continuous laser power 1000W, spot diameter 2mm, lateral symmetrical scanning amplitude 5mm, and scanning speed 1m / s. Deformation is performed using a roller with a diameter of 28mm, a deformation amount of 40%, and a deformation temperature of 900℃~950℃. The position of the deformation mechanism is adjusted by feedback from an infrared thermal imager.

[0060] Manufacturing trajectory such as Figures 3-5 As shown, the laser scanning shaping auxiliary main heat source does not stop or change parameters within the pass, while the deformation mechanism moves synchronously and continuously behind the main heat source. Specifically, powder feeding stops at the ab intersection segment in the first pass of odd-numbered layers, and powder feeding stops at the dc intersection segment in the first pass of even-numbered layers. Furthermore, the four intersection points a, b, c, and d are calculated based on the theoretical width edge of the component, with no additional extension or overlap.

[0061] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A cross-member composite additive manufacturing apparatus, characterized by, The application relates to a six-axis mechanical arm, a main heat source module, a shaping module, a forging module and a head changing module; wherein the six-axis mechanical arm comprises a first six-axis mechanical arm (11) and a second six-axis mechanical arm (12); the first six-axis mechanical arm (11) is provided with a rotatable double pneumatic chuck (61) at the tail end; the second six-axis mechanical arm (12) is provided with a single pneumatic chuck (62) at the tail end; the main heat source module comprises a Tig welding system and a laser coaxial wire powder feeding system; the Tig welding system comprises a Tig power supply, a Tig welding gun (21), a wire guiding device (22), a wire feeder (23) and a hot wire power supply (24); the Tig power supply provides power supply for the Tig welding gun (21); the Tig welding gun (21) is connected with one end of the rotatable double pneumatic chuck (61); the laser coaxial wire powder feeding system comprises an additive laser, a powder feeder, the wire feeder (23) and an additive laser head (3); the positive pole of the hot wire power supply (24) is electrically connected with the wire guiding device (22); the negative pole of the hot wire power supply (24) is electrically connected with a cross member base plate (9); the shaping module comprises a shaping laser and a shaping laser head (4); the shaping laser head (4) is arranged at the end of the shaping laser; the shaping laser head (4) is connected with the other end of the rotatable double pneumatic chuck (61); the forging module comprises a deformation mechanism (5); the deformation mechanism (5) can be set as a roller, an ultrasonic impact rod or a laser impact head as required; the deformation mechanism (5) acts on a component deposition layer (10) through contact or non-contact force; the component deposition layer (10) is located above the cross member base plate (9); the head changing module comprises a changing device and a fixing device; the changing device comprises a tool head (71) and a four-axis tool (72); the fixing device comprises a clamping ring (81) and a tool holder (82); the four-axis tool (72) is fixed on the top end of the tool holder (82) through the clamping ring (81); the tool head (71) and the four-axis tool (72) are connected through a mechanical connection; the tool head (71) is connected with the tail end chuck of the motion module through pneumatic suction force; the four-axis tool (72) can drive the tail end main heat source head to perform three-axis translation and single-axis rotation.

2. A cross-member composite additive manufacturing apparatus according to claim 1, wherein, The Tig welding gun (21) or the additive laser head (3) and the shaping laser head (4) are adjusted in relative position through the rotatable double pneumatic chuck (61) and the four-axis tool (72), so that the melting main heat source and the shaping auxiliary heat source are located in the same plane, and the shaping laser head (4) is vertical, and the included angle between the melting main heat source and the shaping laser head (4) is 30-40 degrees.

3. A cross-member composite additive manufacturing apparatus according to claim 1, wherein, The shaping laser head (4) generates transverse scanning continuous or pulsed laser through a galvanometer, and acts on the tail part of a main heat source molten pool of the component deposition layer (10).

4. A cross-member composite additive manufacturing apparatus according to claim 1, wherein, The deformation mechanism (5) is connected with the tool head (71) through a single-axis tool, and is installed at the tail end of the second six-axis mechanical arm (12) through the single pneumatic chuck (62); the single-axis tool is provided with a pressure sensor for detecting the reaction force received by the deformation mechanism (5) and feeding back the second six-axis mechanical arm (12) to perform motion compensation.

5. A cross-member composite additive manufacturing apparatus according to claim 2, wherein, The additive laser head (3) simultaneously delivers powder and metal wire to the laser molten pool area through the powder feeder and wire feeder (23) to realize multi-material additive manufacturing.

6. A cross-member composite additive manufacturing method, characterized by, The cross member composite additive manufacturing method is realized by the cross member composite additive manufacturing device of any one of claims 1-5, and comprises the following steps: Step S1, analyzing the cross member substrate size to replace the required main heat source; Step S2, first initial straight arm segment laser scanning shaping auxiliary fused filament / powder composite additive manufacturing; Step S3, first cross section stops wire feeding / powder feeding; Step S4, first end straight arm segment laser scanning shaping auxiliary fused filament / powder composite additive manufacturing; Step S5, second full range laser scanning shaping auxiliary fused filament / powder composite additive manufacturing; Step S6, interlayer exchange path sequence and head-tail direction until the manufacturing is completed.

7. A cross-member composite additive manufacturing method according to claim 6, wherein, The cross member substrate in step S1 is a single thin wall, and the size boundary rules include: 1-3mm uses laser coaxial powder feeding, 3-6mm uses laser coaxial wire feeding, and 6-12mm uses Tig side shaft wire feeding.

8. A cross-member composite additive manufacturing method according to claim 6, wherein, In steps S2-S5, the laser scanning shaping auxiliary main heat source does not stop and does not change parameters inside the path, the deformation mechanism moves synchronously and continuously in the suitable temperature zone behind the main heat source, and the cross section is calculated according to the theoretical width of the member, without additional extension lap.

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