Additive rolling composite manufacturing equipment and method for thin-walled rotating shell with ribs

Abstract

An additive rolling composite manufacturing method and equipment for a ribbed thin-walled rotary shell includes a substrate, a feeding device mounted on the substrate, two symmetrically arranged lateral support plates connected to the feeding device, and an additive rolling composite structure mounted on the lateral support plates. A rotary lifting platform is connected to the feeding device between the two lateral support plates, and a support mold is mounted on the rotary lifting platform. Gantry supports are mounted on the substrate on both sides of the rotary lifting platform, and hydraulic cylinders are connected to the gantry supports. The additive manufacturing of the ribbed thin-walled rotary shell and the micro-rolling of the deposited layer are realized simultaneously. The micro-rolling of the deposited layer leads to recrystallization, refines the grains of the deposited layer, and reduces its anisotropy. At the same time, micro-rolling can also promote the closure of pores during the additive manufacturing process, thereby comprehensively improving the microstructure and mechanical properties of the additively manufactured ribbed thin-walled rotary shell.

Description

Technical Field

[0001] This invention belongs to the field of additive rolling composite manufacturing technology, and specifically relates to an additive rolling composite manufacturing equipment and method for a thin-walled rotating shell with ribs. Background Technology

[0002] Thin-walled rotating body shells are widely used in aerospace, weaponry, petrochemical, and other fields. Due to system assembly and structural stability requirements, these components generally require internal ribs on their inner walls. Currently, the main methods for manufacturing these components are casting and welding assembly. The disadvantages of these methods are that they cannot manufacture complex structures. Casting results in coarse grains, shrinkage porosity and cracks, and low mechanical properties. Furthermore, welding the internal ribs to the inner wall of the shell is prone to interference from the welding torch, and the welding area is susceptible to material inhomogeneity, stress concentration, and welding deformation, which reduces the structural dimensional accuracy of the component and limits its performance improvement.

[0003] Metal additive manufacturing is an emerging manufacturing technology that uses digital models to build up materials layer by layer to create physical objects. Its high flexibility enables the manufacture of high-performance non-equilibrium materials and complex structures. The formed components exhibit rapid solidification non-equilibrium structures with no macroscopic segregation, uniform composition, and dense microstructure, resulting in excellent comprehensive mechanical properties. Metal additive manufacturing technology has been widely used in the rapid manufacturing and repair of high-performance key components in aerospace and defense technologies. However, due to the complex alloy phase transformations and microstructure evolution under strong non-equilibrium conditions, additively manufactured parts often suffer from problems such as columnar grains, anisotropy, and void defects. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention aims to provide an additive rolling composite manufacturing equipment and method for a ribbed thin-walled rotating shell, which simultaneously realizes the additive manufacturing of the ribbed thin-walled rotating shell and the micro-rolling of the deposited layer. The micro-rolling of the deposited layer leads to recrystallization, refines the grains of the deposited layer, and reduces its anisotropy. At the same time, micro-rolling can also promote the closure of pores during the additive manufacturing process, thereby comprehensively improving the microstructure and mechanical properties of the additively manufactured ribbed thin-walled rotating shell.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An additive rolling composite manufacturing equipment for a thin-walled rotating shell with ribs includes a base 1, a feeding device 2 mounted on the base 1, two symmetrically arranged lateral support plates 3 connected to the feeding device 2, and an additive rolling composite structure 5 mounted on the lateral support plates 3; a rotary lifting platform 4 connected to the feeding device 2 between the two lateral support plates 3, and a support mold 8 mounted on the rotary lifting platform 4; gantry supports 7 mounted on the base 1 on both the front and rear sides of the rotary lifting platform 4, and hydraulic cylinders 6 connected to the gantry supports 7.

[0007] The feeding device 2 includes a first servo motor 2-1, which is connected to the input end of a double-ended lead screw 2-7, which is mounted on the base 1. First guide rails 2-6 are symmetrically arranged on both sides of the double-ended lead screw 2-7, and are mounted on the base 1. A first slider 2-8 and a second slider 2-11 are mounted on each side of the first guide rail 2-6. A lateral support plate 3 is mounted on each of the two first sliders 2-8 and the two second sliders 2-11, and the two lateral support plates 3 are respectively connected to a first feed nut 2-9 and a second feed nut 2-12 on the double-ended lead screw 2-7. A third slider 2-10 is mounted on each side of the first guide rail 2-6, positioned between the first sliders 2-8 and the second sliders 2-11. A rotary lifting platform 4 is connected to each of the two third sliders 2-10.

[0008] The lateral support plate 3 is equipped with a second guide rail 3-1, which is connected to the rotary lifting platform 4.

[0009] The rotary lifting platform 4 includes a base plate 4-1, which is connected to a top plate 4-9 via a shear support structure. The shear support structure includes four support arms 4-4, arranged symmetrically in pairs. The bottom ends of the two support arms 4-4 are connected to the base plate 4-1 via a lower rotating shaft 4-3 and a lower shaft seat 4-2. The bottom ends of the two support arms 4-4 are connected to a movable rotating shaft 4-14, a first movable shaft seat 4-15, and a second movable shaft seat 4-18. An intermediate rotating shaft 4-5 is connected to the support arms 4-4. The upper ends of the four support arms 4-4 are mounted on the top plate 4-9 via an upper rotating shaft 4-7 and an upper shaft seat 4-8. A rotary motor 4-10 is mounted on the top plate 4-9. The output end of the rotary motor 4-10 is connected to a cylindrical gear 4-11, which meshes with an outer cylindrical gear 4-12 of the turntable. The outer cylindrical gear 4-12 of the turntable is mounted on the top plate 4-9 via a turntable bearing 4-13.

[0010] The first movable shaft seat 4-15 and the second movable shaft seat 4-18 are mounted on the third guide rail 4-19, which is connected to the base plate 4-1. The movable rotating shaft 4-14 is connected to the slider of the lifting screw 4-16, which is mounted on the base plate 4-1. The lifting screw 4-16 is connected to the third servo motor 4-23, which is also connected to the base plate 4-1.

[0011] The additive rolling composite structure 5 includes a second servo motor 5-1, which is connected to a lead screw module 5-3. The slide rod 5-4 on the lead screw module 5-3 is connected to a mounting base plate 5-6. A laser 5-5, a universal ball joint 5-8, and a wire feed head 5-7 are connected to the mounting base plate 5-6.

[0012] The supporting mold 8 includes a processing base 8-1, a lower mold 8-3 connected to the processing base 8-1, an upper mold 8-4 connected above the lower mold 8-3, a part 8-2 on the outer side of the lower mold 8-3 and the upper mold 8-4, and the inner rib plate of the part 8-2 as the dividing line between the upper mold 8-4 and the lower mold 8-3.

[0013] The lower mold 8-3 is an integral mold; the upper mold 8-4 is a segmented mold with an upper mold core 8-5 inserted in the middle.

[0014] The lower mold 8-3 and the upper mold 8-4 are made of heat-resistant ceramic.

[0015] A manufacturing method using an additive rolling composite manufacturing apparatus for a thin-walled rotating body shell with ribs includes the following steps:

[0016] Step 1: Control the first servo motor 2-1 to drive the two side support plates 3 to move to the designated position, so that the side support plates 3 support the rotating lifting platform 4;

[0017] Step 2: Control the third servo motor 4-23 to move and raise the top plate 4-9 to the highest point;

[0018] Step 3: Install the lower mold 8-3 in the processing base 8-1, and use the upper surface of the processing base 8-1 as the substrate for laser deposition;

[0019] Step 4: Control the second servo motor 5-1 to move the laser 5-5 and the universal ball head 5-8 to the corresponding positions. At this time, the laser 5-5 meets the optimal distance for laser printing, and the universal ball head 5-8 rolls the deposited layer.

[0020] Step 5: Control hydraulic cylinder 6 so that the front end of hydraulic cylinder 6 supports the lower mold 8-3;

[0021] Step 6: Turn on the laser 5-5 and feed the wire through the wire feeder 5-7 to begin additive manufacturing of the thin-walled rotating shell with ribs. Control the rotary motor 4-10 and the third servo motor 4-23 to move synchronously, the processing base 8-1 to rotate, and the rotary lifting platform 4 to gradually descend and deposit in a spiral pattern. Calculate the lifting speed of the rotary lifting platform 4 based on the width of the laser-deposited single-pass weld, the overlap rate between welds, and the diameter of the part's cross-section. Simultaneously, control the movement of the second servo motor 5-1 according to the curvature change of the part, so that the universal ball head 5-8 can evenly roll the deposited layer.

[0022] Step 7: After processing the inner rib plate, stop the movement, turn off the laser 5-5 and stop the wire feeding, control the hydraulic cylinder 6 to rise, and assemble the upper mold 8-4 and the upper mold core 8-5 and install them on the lower mold 8-3.

[0023] Step 8: Control the hydraulic cylinder 6 to descend so that the front end of the hydraulic cylinder 6 supports the upper mold 8-4, and proceed with processing as in Step 6;

[0024] Step 9: After the additive manufacturing is completed, stop the movement, turn off the laser 5-5 and stop the wire feeding, control the hydraulic cylinder 6 to rise, control the second servo motor 5-1 to move backward, remove the upper mold 8-4 and take off the part 8-2.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] This invention combines micro-rolling with additive manufacturing. Compared to traditional single additive repair techniques, this invention introduces micro-rolling deformation during the additive manufacturing process, leading to recrystallization, refining the grain size of the deposited layer, and reducing its anisotropy. Simultaneously, micro-rolling also promotes the closure of pores during additive manufacturing, thereby comprehensively improving the microstructure and mechanical properties of the ribbed thin-walled rotating shell produced by additive manufacturing. Furthermore, this invention also has the following advantages:

[0027] 1) The additive composite rolling process is highly integrated. This invention integrates a feeding device and an additive rolling composite structure. The manufacturing of a thin-walled rotating shell with ribs can be completed using this invention.

[0028] 2) A symmetrical additive rolling composite structure is adopted. By controlling the lifting speed of the rotary lifting platform, multi-line spiral manufacturing can be achieved, which improves processing efficiency.

[0029] 3) The manufacturing equipment is simple, low-cost, and highly flexible. The top plate 4-9 of the rotating lifting platform 4 and the processing base 8-1 can be replaced according to the size of different parts, which is convenient for implementation. Attached Figure Description

[0030] Figure 1This is a schematic diagram of the overall device according to an embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of the equipment feeding device according to an embodiment of the present invention.

[0032] Figure 3 This is a schematic diagram of the additive rolling composite structure of the equipment in an embodiment of the present invention.

[0033] Figure 4 This is a schematic diagram of the rotating lifting platform of the equipment in an embodiment of the present invention.

[0034] Figure 5 This is a schematic diagram of the equipment support mold according to an embodiment of the present invention. Detailed Implementation

[0035] The present invention will now be described in conjunction with the accompanying drawings and embodiments. The embodiments described are for illustrative purposes only and are not intended to limit the scope of the invention.

[0036] like Figure 1 As shown, an additive rolling composite manufacturing equipment for a thin-walled rotating shell with ribs includes a base 1, a feeding device 2 mounted on the base 1, two symmetrically arranged lateral support plates 3 connected to the feeding device 2, and an additive rolling composite structure 5 mounted on the lateral support plates 3; a rotary lifting platform 4 connected to the feeding device 2 between the two lateral support plates 3, and a support mold 8 mounted on the rotary lifting platform 4; gantry supports 7 mounted on the base 1 on both the front and rear sides of the rotary lifting platform 4, and hydraulic cylinders 6 connected to the gantry supports 7;

[0037] like Figure 2As shown, the feeding device 2 includes a first servo motor 2-1, which is connected to one side of a first reducer 2-2 and a first coupling 2-3. The first servo motor 2-1 is mounted on the base 1 via a motor mounting head seat 2-4. The other side of the first coupling 2-3 is connected to the head input end of a double-ended lead screw 2-7, and the tail end of the double-ended lead screw 2-7 is connected to a motor mounting tail seat 2-13, which is mounted on the base 1. First guide rails 2-6 are symmetrically arranged on both sides of the double-ended lead screw 2-7. The first guide rails 2-6 are connected to guide rail supports 2-5, which are mounted on the base 1. A first slider is mounted on each of the first guide rails 2-6. 2-8 and 2-11 are first sliders 2-8 and second sliders 2-11 respectively. A side support plate 3 is installed on each of the two first sliders 2-8 and the two second sliders 2-11. The two side support plates 3 are connected to the first feed nut 2-9 and the second feed nut 2-12 on the double-ended lead screw 2-7 respectively. The first feed nut 2-9 and the second feed nut 2-12 drive the two side support plates 3 to move in opposite directions, thereby realizing the adaptation and installation of components of different sizes. In addition, a third slider 2-10 is also installed on the first guide rail 2-6 on each side. The third slider 2-10 is located between the first slider 2-8 and the second slider 2-11. A rotary lifting platform 4 is connected to the two third sliders 2-10.

[0038] like Figure 3 As shown, a second guide rail 3-1 is installed on the lateral support plate 3. The second guide rail 3-1 is connected to the rotary lifting platform 4 to ensure that the rotary lifting platform 4 can be raised and lowered smoothly.

[0039] like Figure 4 As shown, the rotary lifting platform 4 includes a base plate 4-1, which is connected to a top plate 4-9 via a shear support structure. The shear support structure includes four support arms 4-4, arranged symmetrically in pairs. The bottom ends of the two support arms 4-4 are connected via a lower pivot 4-3 and a lower bearing 4-2, which is connected to the base plate 4-1 to form the fixed bottom end of the shear support structure. The bottom ends of the two support arms 4-4 are connected via a movable pivot 4-14, a first movable bearing 4-15, and a second movable bearing 4-18 to form the movable bottom end of the shear support structure. An intermediate pivot 4-5 and a support plate 4-6 are connected to the support arms 4-4. The upper ends of the four support arms 4-4 are connected via an upper pivot 4-7 and an upper bearing 4-8, which is mounted on the top plate 4-9.

[0040] The first movable shaft seat 4-15 and the second movable shaft seat 4-18 are mounted on the third guide rail 4-19, which is connected to the base plate 4-1. The movable rotating shaft 4-14 is connected to the slider of the lifting screw 4-16. One end of the lifting screw 4-16 is mounted on the bearing tail seat 4-17, which is connected to the base plate 4-1. The other end of the lifting screw 4-16 is connected via the third coupling 4-21, the third reducer 4-22, and the third servo motor 4-23. The third servo motor 4-23 is mounted on the bearing seat 4-20, which is connected to the base plate 4-1. The third servo motor 4-23 drives the movable rotating shaft 4-14 to move, thereby driving the rotation of the support arm 4-4, which ultimately results in the lifting and lowering of the top plate 4-9.

[0041] A rotary motor 4-10 is installed on the top plate 4-9. The output end of the rotary motor 4-10 is connected to a cylindrical gear 4-11. The cylindrical gear 4-11 meshes with the outer ring cylindrical gear 4-12 of the turntable. The outer ring cylindrical gear 4-12 of the turntable is mounted on the turntable bearing 4-13, and the turntable bearing 4-13 is mounted on the top plate 4-9.

[0042] like Figure 3 As shown, the additive rolling composite structure 5 includes a second servo motor 5-1, which is connected to a lead screw module 5-3 via a second coupling 5-2. A slide rod 5-4 is connected to the lead screw module 5-3, which is connected to a mounting base 5-6. A laser 5-5 and a universal ball joint 5-8 are connected to the mounting base 5-6. The universal ball joint 5-8 can realize the rolling of surfaces with different curvatures. A wire feed head 5-7 is connected to the side of the mounting base 5-6.

[0043] like Figure 5 As shown, the supporting mold 8 includes a processing base 8-1, a lower mold 8-3 connected to the processing base 8-1, and an upper mold 8-4 connected above the lower mold 8-3. The outer sides of the lower mold 8-3 and the upper mold 8-4 are parts 8-2, with the inner rib plate of part 8-2 serving as the dividing line between the upper mold 8-4 and the lower mold 8-3. The materials of the lower mold 8-3 and the upper mold 8-4 are heat-resistant ceramics. The lower mold 8-3 is an integral mold, while the upper mold 8-4 is a segmented mold with an upper mold core 8-5 inserted in the middle. The segmented mold design facilitates later disassembly.

[0044] A manufacturing method using an additive rolling composite manufacturing apparatus for a thin-walled rotating body shell with ribs includes the following steps:

[0045] Step 1: Control the first servo motor 2-1 to drive the two side support plates 3 to move to the designated position, so that the side support plates 3 support the rotating lifting platform 4;

[0046] Step 2: Control the third servo motor 4-23 to move and raise the top plate 4-9 to the highest point;

[0047] Step 3: Install the lower mold 8-3 in the processing base 8-1, and use the upper surface of the processing base 8-1 as the substrate for laser deposition;

[0048] Step 4: Control the second servo motor 5-1 to move the laser 5-5 and the universal ball head 5-8 to the corresponding positions. At this time, the laser 5-5 meets the optimal distance for laser printing, and the universal ball head 5-8 rolls the deposited layer with a rolling force greater than 10KN.

[0049] Step 5: Control the hydraulic cylinder 6 so that the front end of the hydraulic cylinder 6 supports the lower mold 8-3 to prevent excessive rolling force from causing structural eccentricity;

[0050] Step 6: Turn on the laser 5-5 and feed the wire through the wire feeder 5-7 to begin additive manufacturing of the thin-walled rotating shell with ribs. Control the rotary motor 4-10 and the third servo motor 4-23 to move synchronously, the processing base 8-1 to rotate, and the rotary lifting platform 4 to gradually descend and deposit in a spiral pattern. Calculate the lifting speed of the rotary lifting platform 4 based on the width of the laser-deposited single-pass weld, the overlap rate between welds, and the diameter of the part's cross-section. Simultaneously, control the movement of the second servo motor 5-1 according to the curvature change of the part, so that the universal ball head 5-8 can evenly roll the deposited layer.

[0051] Step 7: After processing the inner rib plate, stop the movement, turn off the laser 5-5 and stop the wire feeding, control the hydraulic cylinder 6 to rise, and assemble the upper mold 8-4 and the upper mold core 8-5 and install them on the lower mold 8-3.

[0052] Step 8: Control the hydraulic cylinder 6 to descend so that the front end of the hydraulic cylinder 6 supports the upper mold 8-4, and proceed with processing as in Step 6;

[0053] Step 9: After the additive manufacturing is completed, stop the movement, turn off the laser 5-5 and stop the wire feeding, control the hydraulic cylinder 6 to rise, control the second servo motor 5-1 to move backward, remove the upper mold 8-4 and take off the part 8-2.

Claims

1. An additive rolling hybrid manufacturing apparatus for a girdle thin-walled rotary shell, comprising a base body (1), characterized in that: The base body (1) is provided with a feeding device (2), two laterally symmetrical lateral support plates (3) are connected to the feeding device (2), and an additive rolling composite structure (5) is installed on the lateral support plates (3); a rotary lifting platform (4) is connected to the feeding device (2) between the two lateral support plates (3), and a support mold (8) is installed on the rotary lifting platform (4); gantry supports (7) are installed on the base body (1) on the front and rear sides of the rotary lifting platform (4), and hydraulic cylinders (6) are connected to the gantry supports (7); The feeding device (2) comprises a first servo motor (2-1), the first servo motor (2-1) is connected with the input end of a double-head screw (2-7), and the double-head screw (2-7) is installed on the base body (1); first guide rails (2-6) are symmetrically arranged on the two sides of the double-head screw (2-7), and the first guide rails (2-6) are installed on the base body (1); a first sliding block (2-8) and a second sliding block (2-11) are installed on each first guide rail (2-6), one lateral support plate (3) is installed on each of the two first sliding blocks (2-8) and the two second sliding blocks (2-11), and the two lateral support plates (3) are connected with first feeding nuts (2-9) and second feeding nuts (2-12) on the double-head screw (2-7) respectively; a third sliding block (2-10) is installed on each first guide rail (2-6), and the third sliding block (2-10) is arranged between the first sliding block (2-8) and the second sliding block (2-11), and the two third sliding blocks (2-10) are connected with the rotary lifting platform (4); The additive rolling composite structure (5) comprises a second servo motor (5-1), the second servo motor (5-1) is connected with a screw module (5-3), a sliding table connecting rod (5-4) on the screw module (5-3) is connected to a mounting base plate (5-6), and a laser (5-5), a universal ball head (5-8) and a wire feeding head (5-7) are connected to the mounting base plate (5-6); The support mold (8) comprises a machining base (8-1), a lower mold (8-3) is connected to the machining base (8-1), an upper mold (8-4) is connected above the lower mold (8-3), and the lower mold (8-3) and the upper mold (8-4) are divided by an inner rib plate of a part (8-2) as a boundary; The lower mold (8-3) is a whole mold, the upper mold (8-4) is a split mold, and an upper mold core (8-5) is inserted in the middle.

2. The apparatus of claim 1, wherein: A second guide rail (3-1) is installed on the lateral support plate (3), and the second guide rail (3-1) is connected with the rotary lifting platform (4).

3. The apparatus of claim 1, wherein: The rotating lifting platform (4) comprises a bottom plate (4-1), the bottom plate (4-1) is connected through a shearing support structure and a top plate (4-9), the shearing support structure comprises four support arms (4-4), and every two support arms (4-4) are symmetrically arranged and cross each other; the bottom ends of the two support arms (4-4) are connected to the bottom plate (4-1) through a lower rotating shaft (4-3) and a lower shaft seat (4-2); the bottom ends of the two support arms (4-4) are connected through a moving rotating shaft (4-14) and a first moving shaft seat (4-15) and a second moving shaft seat (4-18); an intermediate rotating shaft (4-5) is connected to the support arm (4-4); the upper ends of the four support arms (4-4) are installed on the top plate (4-9) through an upper rotating shaft (4-7) and an upper shaft seat (4-8); a rotating motor (4-10) is installed on the top plate (4-9), the output end of the rotating motor (4-10) is connected with a cylindrical gear (4-11), the cylindrical gear (4-11) is engaged with a rotating disc outer circle cylindrical gear (4-12), and the rotating disc outer circle cylindrical gear (4-12) is installed on the top plate (4-9) through a rotating disc bearing (4-13).

4. The apparatus of claim 3, wherein: The first moving shaft seat (4-15) and the second moving shaft seat (4-18) are installed on a third guide rail (4-19), and the third guide rail (4-19) is connected to the bottom plate (4-1); the moving rotating shaft (4-14) is connected to the sliding block of a lifting lead screw (4-16), the lifting lead screw (4-16) is installed on the bottom plate (4-1), the lifting lead screw (4-16) is connected with a third servo motor (4-23), and the third servo motor (4-23) is connected to the bottom plate (4-1).

5. The apparatus of claim 1, wherein: The lower mold (8-3) and the upper mold (8-4) are made of heat-resistant ceramic.

6. A manufacturing method using the apparatus according to claim 4, characterized by, The method comprises the following steps: Step 1: control the first servo motor (2-1) to drive the two lateral support plates (3) to move to the specified position, so that the lateral support plates (3) support the rotating lifting platform (4); Step 2: control the third servo motor (4-23) to move, and lift the top plate (4-9) to the highest point; Step 3: install the lower mold (8-3) in the processing base (8-1), and take the upper surface of the processing base (8-1) as the substrate for laser deposition; Step 4: control the second servo motor (5-1) to move, so that the laser (5-5) and the universal ball head (5-8) move to the corresponding position, at this time, the laser (5-5) satisfies the optimal distance for laser printing, and the universal ball head (5-8) rolls and deposits the layer; Step 5: control the hydraulic cylinder (6), so that the front end of the hydraulic cylinder (6) supports the lower mold (8-3); Step 6: Turn on the laser (5-5) and feed the wire through the wire feeder (5-7), start the additive manufacturing of the ribbed plate thin-walled rotary shell, control the synchronous movement of the rotary motor (4-10) and the third servo motor (4-23), process the base (8-1) to rotate, and gradually lower the rotary lifting platform (4) to deposit in the form of a spiral line. According to the width of the laser deposition single pass weld and the overlap rate between the welds, as well as the diameter of the part cross section, the lifting speed of the rotary lifting platform (4) is calculated; at the same time, according to the change of the curvature of the part, the second servo motor (5-1) is controlled to move, so that the universal ball head (5-8) uniformly rolls on the deposited layer; Step 7: After the inner rib plate is processed, stop moving, turn off the laser (5-5) and stop feeding the wire, control the hydraulic cylinder (6) to rise, assemble the upper mold (8-4) and the upper mold core (8-5) to the lower mold (8-3); Step 8: Control the hydraulic cylinder (6) to descend to support the front end of the hydraulic cylinder (6) with the upper mold (8-4), and process according to step 6; Step 9: After the additive manufacturing is completed, stop moving, turn off the laser (5-5) and stop feeding the wire, control the hydraulic cylinder (6) to rise, control the second servo motor (5-1) to retreat, remove the upper mold (8-4) and take down the part (8-2).

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