Method for manufacturing a laminated object and a laminating system

Abstract

To provide a production method of a laminated molding capable of improving surface accuracy of the laminated molding; and to provide a laminating molding system.SOLUTION: A production method of a laminated molding includes a contour part molding step for laminating and molding a contour part which is an outside part of the laminated molding, with contour part bead formed by weaving welding, and a core part molding step for laminating and molding a core part which is an inside part of the laminated molding, with core part bead formed by welding.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present disclosure relates to a method for manufacturing a laminated object and a laminating system.

Background Art

[0002] Patent Document 1 discloses a method for manufacturing a laminated object by laminating weld beads formed by melting and solidifying a filler material.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the method for manufacturing a laminated object described in Patent Document 1, sagging or undulation may occur on the side surface of the laminated object, and the surface accuracy of the laminated object may decrease.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide a method for manufacturing a laminated object and a laminating system capable of improving the surface accuracy of the laminated object.

Means for Solving the Problems

[0006] In order to solve the above problems, a method for manufacturing a laminated object according to the present disclosure includes a contour forming step of laminating and forming a contour portion, which is an outer portion of the laminated object, with contour beads continuously formed in a welding direction by weaving welding, and a core forming step of laminating and forming a core portion, which is an inner portion of the laminated object, with core beads formed in the welding direction by straight welding. to The core forming step includes forming the core beads in the welding direction.

[0007] The additive manufacturing system according to the present disclosure includes a welding head and an additive manufacturing control device that controls the welding head so that the additive manufacturing object is formed. The additive manufacturing control device includes a contour part manufacturing control unit that controls the welding head so that a contour part, which is an outer part of the additive manufacturing object, is additively manufactured with contour part beads that are continuously formed in a plurality in the welding direction by weaving welding, and a core part manufacturing control unit that controls the welding head so that a core part, which is an inner part of the additive manufacturing object, is additively manufactured with core part beads formed by straight welding in the welding direction to and has a core part manufacturing control unit that controls the welding head so that the core part is additively manufactured with core part beads formed in the welding direction

Advantages of the Invention

[0008] According to the method for manufacturing an additive manufacturing object and the additive manufacturing system of the present disclosure, it is possible to provide a method for manufacturing an additive manufacturing object and an additive manufacturing system that can improve the surface accuracy of the additive manufacturing object.

Brief Description of the Drawings

[0009]

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Mode for Carrying Out the Invention

[0010] <First Embodiment> (Laminated Manufacturing System) Hereinafter, a laminated manufacturing system 1 and a manufacturing method of a laminated object 10 according to a first embodiment of the present disclosure will be described with reference to FIGS. 1 to 9. The laminated manufacturing system 1 of the present embodiment builds up a build-up on the surface of the stage 2 using a metal filler material to shape the laminated object 10. The laminated manufacturing system 1 of the present embodiment is applicable to various three-dimensional laminated manufacturing technologies such as, for example, a 3D printer. As shown in FIG. 1, the additive manufacturing system 1 includes a stage 2, a welding head 20, and an additive manufacturing controller 40. A cross-section of the additive manufactured object 10 is schematically shown in FIG. 1.

[0011] (Stage) The stage 2 is a plate-like member formed of a metal material. The surface of the stage 2 on which the additive manufactured object 10 is manufactured is a flat surface. The surface of the stage 2 is along a horizontal plane. Hereinafter, the normal direction of the surface of the stage 2 may be simply referred to as the "normal direction", and the direction along the surface of the stage 2 may be simply referred to as the "surface direction".

[0012] (Welding Head) The welding head 20 is disposed opposite to the surface of the stage 2. The welding head 20 melts the filler material and forms droplet-shaped welding beads 3 on the surface of the stage 2. The filler material is a metal material. Examples of the filler material include stainless steel, titanium alloy, nickel alloy, aluminum alloy, chromium alloy, etc. The filler material may be the same metal as the stage 2 or a different metal from the stage 2. A plurality of welding beads 3 are continuously formed in the surface direction of the surface of the stage 2. By laminating a plurality of welding beads 3 in the normal direction of the surface of the stage 2, the target additive manufactured object 10 is manufactured. The welding bead 3 is the minimum unit constituting the additive manufactured object 10. Therefore, the size of the welding bead 3 is a factor that determines the shape accuracy of the additive manufactured object 10. Hereinafter, the maximum dimension of the welding bead 3 in the surface direction of the surface of the stage 2 may be simply referred to as the "bead width".

[0013] In the manufacturing process of the additive manufactured object 10, since it appears to be dotted by the welding bead 3, the size of the bead width may be expressed as the resolution of the welding bead 3. Hereinafter, it is assumed that the larger the bead width, the lower the resolution of the welding bead 3, and the smaller the bead width, the higher the resolution of the welding bead 3. The welding head 20 can form two types of welding beads 3, namely, welding beads 3 having a first resolution and welding beads 3 having a second resolution higher than the first resolution.

[0014] The welding head 20 has a head body 21 that is movable relative to the stage 2. The welding head 20 forms a weld bead 3 while moving the head body 21. The welding head 20 can swing the heat source and the filler material in an arbitrary direction with respect to the moving direction of the head body 21. Hereinafter, the moving direction of the head body 21 during welding may be referred to as the welding direction. By swinging the heat source and the filler material and performing welding, weaving welding can be performed. Note that straight welding can also be performed by performing welding without swinging the heat source and the filler material with respect to the welding direction.

[0015] Note that the welding head 20 may be a laser welding head 20a or an arc welding head 20b. The welding method in this embodiment can be changed as appropriate.

[0016] (Laser welding head) As shown in FIG. 2, when the welding head 20 is a laser welding head 20a, the heat source is a laser beam L. Further, for example, powder P is used as the filler material. The laser welding head 20a includes a head body 21, a laser source 22, and a powder supply unit (not shown).

[0017] The head body 21 is provided at a position spaced in the normal direction from the surface of the stage 2. The head body 21 is formed in a frustum shape that tapers as it approaches the surface of the stage 2. The central axis of the head body 21 extends in the normal direction of the surface of the stage 2. The central axis of the head body 21 may be slightly inclined with respect to the normal of the surface of the stage 2. A laser passage 23 and a powder supply passage 24 are formed in the head body 21.

[0018] The laser passage 23 penetrates the head body 21 along the central axis of the head body 21. The laser passage 23 is formed in a tapered shape that tapers as it approaches the surface of the stage 2 in a side view.

[0019] The powder supply path 24 penetrates the head body 21 in the axial direction. The powder supply path 24 is formed along the outer peripheral surface of the head body 21. The powder supply path 24 is symmetrically formed with the laser passage 23 interposed therebetween in a side view. As it approaches the stage 2, the powder supply path 24 linearly and gradually approaches the central axis of the head body 21.

[0020] The laser source 22 is disposed at a position spaced apart from the stage 2. The laser source 22 emits laser light L toward the surface of the stage 2. The laser light L travels straight in the axial direction within the laser passage 23 of the head body 21 and irradiates the surface of the stage 2. A spot of the laser light L is generated on the surface of the stage 2.

[0021] A powder supply unit (not shown) supplies powder P to the head body 21. The powder P is supplied into the powder supply path 24 of the head body 21. A carrier gas flows in the powder supply path 24 toward the surface of the stage 2. For this reason, the powder P is jetted onto the spot of the laser light L on the stage 2 by the flow of the carrier gas in the powder supply path 24. The jetted powder P is melted by the laser light L and becomes a weld bead 3.

[0022] When the welding head 20 is the laser welding head 20a, the shape and bead width of the weld bead 3 can be adjusted by adjusting the energy of the laser light L and the spot shape of the laser light L. The spot shape of the laser light L is changed by an optical element (not shown) through which the laser light L passes before being irradiated onto the surface of the stage 2. The optical element is, for example, a diffuser plate and a focusing lens. The spot shape of the laser light L can be controlled by precise curvature control of the optical element.

[0023] (Arc welding head) As shown in FIG. 3, when the welding head 20 is the arc welding head 20b, the heat source is an arc A. Also, for example, a wire W is used as the filler metal. The arc welding head 20b includes a head body 21, an electrode 26, and a wire W.

[0024] The head body 21 is provided at a position spaced apart in the normal direction from the surface of the stage 2. The head body 21 is formed in a cylindrical shape. The central axis of the head body 21 is aligned along the normal direction to the surface of the stage 2.

[0025] The electrode 26 is formed in a rod shape extending in one direction. The electrode 26 is inserted into the head main body 21. The end of the electrode 26 on the surface side of the stage 2 is covered from the radial outside by the head main body 21.

[0026] The electrode 26 also has a wire insertion passage 27 that penetrates it in the axial direction. The wire W is inserted through the wire insertion passage 27. The tip of the wire W protrudes from the electrode 26 and is covered from the radial outside by the head body 21. A positive voltage is applied to the wire W via the electrode 26. When the voltage difference between the wire W and the stage 2 exceeds a predetermined value, insulation breakdown occurs in the air between the wire W and the stage 2, causing a discharge. This generates an arc A in the space between the wire W and the stage 2. The tip of the wire W is melted by this arc A, becoming a weld bead 3. The wire W is fed sequentially toward the arc A by the amount necessary to form the weld bead 3.

[0027] When welding head 20 is arc welding head 20b, the shape and bead width of weld bead 3 can be adjusted by adjusting the energy of arc A by adjusting the voltage applied to wire W, for example.

[0028] In the above embodiment, the welding head 20 is a laser welding head 20a or an arc welding head 20b, but this is not limited thereto, and the welding head 20 may be an electron beam shaping head. The electron beam shaping head uses a metal wire W as a filler material, similar to the arc welding head 20b. The electron beam shaping head melts the wire W with an electron beam to form a weld bead 3. This method of supplying metal filler material from the welding head 20 and melting it with a heat source such as laser light L, arc A, or electron beam and depositing it at the desired location is called the "deposition method."

[0029] (Laminated Structure Control Device) Next, the configuration of the laminated structure control device 40 of the present embodiment will be described with reference to FIG. 4. The laminated structure control device 40 controls the welding head 20 so that the welding head 20 forms the laminated structure 10. The laminated structure control device 40 is connected to the welding head 20 by wire or wirelessly. The laminated structure control device 40 includes processing units such as a shaped object data acquisition unit 41, an area specification unit 42, an operation setting unit 43, a contour part shaping control unit 45, and a core part shaping control unit 44.

[0030] (Shaped Object Data Acquisition Unit) The shaped object data acquisition unit 41 acquires the shaped object data of the laminated structure 10. The shaped object data includes data on the final shape of the laminated structure 10. Here, the laminated structure 10 can be distinguished into a core part 11 that is the inner part of the laminated structure 10 and a contour part 12 that is the outer part of the laminated structure 10 (see FIG. 1).

[0031] (Area Specification Unit) The area specification unit 42 specifies a core area for shaping the core part 11 and a contour area for shaping the contour part 12 based on the final shape of the laminated structure 10. Hereinafter, the welding bead 3 for laminating and shaping the contour part 12 may be referred to as a contour part bead 3b, and the welding bead 3 for laminating and shaping the core part 11 may be referred to as a core part bead 3a. The contour part bead 3b and the core part bead 3a are formed of the same welding material.

[0032] (Operation Setting Unit) The operation setting unit 43 sets the operation of the welding head 20 to shape the core part 11 based on the core area, and sets the operation of the welding head 20 to shape the contour part 12 based on the contour area.

[0033] (Contour Part Shaping Control Unit) The contour part shaping control unit 45 controls the welding head 20 to laminate and shape the contour part 12 with the contour part bead 3b.

[0034] (Core part forming control unit) The core part forming control unit 44 controls the welding head 20 so as to form the core part 11 by laminating with the core part bead 3a.

[0035] (Procedure of the method for manufacturing a laminated object) Hereinafter, the procedure of the method for manufacturing the laminated object 10 using the laminating system 1 will be described with reference to the flowchart shown in FIG. 5. The method for manufacturing the laminated object 10 includes a model data acquisition step S11, a region identification step S12, an operation setting step S13, a contour part forming step S14, and a core part forming step.

[0036] In the model data acquisition step S11, the model data acquisition unit 41 acquires the model data of the laminated object 10.

[0037] After the model data acquisition step S11, the region identification step S12 is performed. In the region identification step S12, the region identification unit 42 identifies the core region and the contour region based on the model data. As shown in FIG. 1 here, the laminated object 10 can be distinguished into a core part 11 which is the inner part of the laminated object 10 and a contour part 12 which is the outer part of the laminated object 10. In the region identification step S12, the outer part with a predetermined thickness including the surface of the model in the model data is identified as the contour region, and the part inside the contour part is identified as the core region.

[0038] After the region identification step S12, the operation setting step S13 is performed. In the operation setting step S13, the operation setting unit 43 sets the operation of the welding head 20 to form the contour part 12 based on the contour region, and sets the operation of the welding head 20 to form the core part 11 based on the core region.

[0039] After the operation setting step S13, the contour forming step S14 is performed. As shown in FIG. 6, in the contour forming step S14, the contour 12 is laminated and formed with the contour bead 3b. The contour bead 3b is formed with a second resolution higher than the first resolution. FIG. 6 shows a cross section of the formed contour 12. In the contour forming step S14, the contour forming control unit 45 controls the welding head 20 based on the settings of the operation setting unit 43, and laminates and forms the contour 12 in the contour area.

[0040] The head body 21 of the welding head 20 is arranged at a position separated by a predetermined distance in the normal direction from the contour area on the surface of the stage 2. The head body 21 moves in the plane direction of the surface of the stage 2 while maintaining the separation distance from the surface of the stage 2. More specifically, the head body 21 moves in a direction orthogonal to the direction of the reciprocating motion while repeating a linear reciprocating motion along the plane direction. The welding head 20 repeats the temporary stop of the head body 21 and the formation of the contour bead 3b. In this way, a plurality of contour beads 3b are continuously formed in the core area on the surface of the stage 2. The plurality of formed contour beads 3b all have substantially the same resolution. By integrating the plurality of contour beads 3b, the first layer of the contour 12 is formed.

[0041] When the first layer is formed, the process proceeds to the formation of the second layer. In the formation of the second layer, the head body 21 is separated from the surface of the stage 2 in the normal direction by a height corresponding to one layer. Thereafter, the welding head 20 operates in the same manner as when forming the first layer, and forms the second layer on top of the first layer. The third layer and subsequent layers are formed in the same manner as the second layer. In this way, in one contour forming step S14, the contour 12 is formed in multiple layers. It is desirable that each layer of the contour 12 is formed only during the forward stroke of the reciprocating motion of the head body 21.

[0042] As shown in FIG. 7, the contour portion 12 is formed to extend along the welding direction when viewed from the normal direction. FIG. 7 is a schematic view of the contour portion 12 during shaping, viewed from the normal direction. The contour beads 3b constituting the contour portion 12 are formed by weaving welding. In weaving welding, the contour beads 3b are formed while oscillating both the heat source and the filler material in a direction orthogonal to the welding direction and in the plane direction. The contour beads 3b are formed in a rectangular shape with the welding direction as the short side direction when viewed from the normal direction. The width W1 of the contour beads 3b in the welding direction is, for example, 1 / 10 times or more and 1 / 2 times or less, preferably 1 / 8 times or more and 1 / 6 times or less, the width of the contour beads 3b in the direction orthogonal to the welding direction.

[0043] After the contour shaping step S14, a core shaping step S15 is performed. As shown in FIG. 8, in the core shaping step S15, the core 11 is laminated and shaped on the inside of the contour portion 12 shaped in the immediately preceding contour shaping step S14 and on the surface of the stage 2 with the core beads 3a. FIG. 8 shows a cross section of the formed core 11 and contour portion 12. In the core shaping step S15, the core shaping control unit 44 controls the welding head 20 based on the settings of the operation setting unit 43, and laminates and shapes the core 11 in the core region.

[0044] In the core shaping step S15, the core 11 is shaped by the same height as the contour portion 12 shaped in the immediately preceding contour shaping step S14. The head body 21 of the welding head 20 moves in the plane direction while repeating a linear reciprocating motion, similar to the contour shaping step S14. The welding head 20 repeats the temporary stop of the head body 21 and the formation of the core beads 3a. In this way, a plurality of core beads 3a are continuously formed inside the contour portion 12 when viewed from the normal direction. All of the formed plurality of core beads 3a have substantially the same resolution. By integrating the plurality of core beads 3a, the first layer of the core 11 is shaped.

[0045] Once the first layer is formed, the process proceeds to the formation of the second layer. In the formation of the second layer, the head body 21 is spaced apart from the surface of the stage 2 in the normal direction by a height corresponding to one layer. Thereafter, the welding head 20 operates in the same manner as during the formation of the first layer to form the second layer on top of the first layer. For the third layer and subsequent layers, the formation is carried out in the same manner as for the second layer. The core part 11 is formed until it reaches the same height as the contour part 12 formed in the immediately preceding contour part forming step S14.

[0046] As shown in FIG. 9, the core bead 3a is formed by straight welding. FIG. 9 is a schematic view of the core part 11 during formation, seen from the normal direction. In straight welding, the core bead 3a is formed without oscillating both the heat source and the filler material with respect to the welding direction. The width W2 in the direction orthogonal to the welding direction in the core bead 3a is, for example, 2 times or more and 10 times or less, desirably 6 times or more and 8 times or less, the width W1 of the contour bead 3b.

[0047] The core part forming step S15 and the contour part forming step S14 may be carried out by laser welding using the powder P as the filler material, or may be carried out by arc A welding using the wire W as the filler material.

[0048] After the contour part forming step S15, a determination of the end of the process is made. In the determination of the end of the process, the layer forming control device 40 determines whether the production of the laminated formed object 10 has been completed based on the formed object data (step S16). If the layer forming control device 40 determines that the production of the laminated formed object 10 has not been completed (step S16; NO), it proceeds to the core part forming step S15.

[0049] If the layer forming control device 40 determines that the production of the laminated formed object 10 has been completed (step S16; YES), it terminates the operation of the welding head 20. Thereafter, finishing processing is performed on the surface of the laminated formed object 10. Examples of the finishing processing include cutting and polishing. The surface accuracy of the laminated formed object 10 is improved by the finishing processing. Note that the finishing processing can be omitted as appropriate. In this way, the production of the laminated formed object 10 is completed.

[0050] (Function and Effect) According to the laminated modeling system 〇 and the method for manufacturing the laminated molded object 10 as described above, by forming the contour bead 3b by weaving welding, the contour portion 12 can be formed more densely. As a result, the surface accuracy of the laminated molded object 10 can be improved.

[0051] Here, generally, the welding speed of weaving welding is slower than that of straight welding. However, by performing weaving welding, it is possible to suppress the variation in the amount of the weld bead 3 in the welding region as compared with straight welding. Further, by performing weaving welding, the number of welding passes can be reduced as compared with straight welding, so that heat input control can be easily performed. Therefore, by forming the contour bead 3b by weaving welding, it is possible to suppress the variation in the amount of the contour bead 3b in the welding region. Thereby, the contour portion 12 can be accurately shaped, so that the surface accuracy of the laminated molded object 10 can be improved. In addition, since the number of welding passes can be reduced, heat input control can be easily performed. Further, for example, the contour portion 12 can be laminated and molded by weaving welding, and the core portion 11 can be laminated and molded by straight welding. In this case, the manufacturing time of the laminated molded object 10 can be shortened as compared with the case where all of the laminated molded object 10 is laminated and molded by weaving welding, and the accuracy of the contour portion 12 can be improved as compared with the case where the contour portion 12 is laminated and molded by straight welding, and the surface accuracy of the laminated molded object 10 can be improved.

[0052] Further, in the present embodiment, after the contour portion 12 is laminated and molded, the core portion 11 is laminated and molded. Thereby, the core portion 11 can be shaped so that the side surface of the core portion 11 is supported by the contour portion 12. Therefore, it is possible to suppress the occurrence of sagging due to its own weight on the side surface of the core portion 11. Therefore, the surface accuracy of the laminated molded object 10 can be improved.

[0053] Furthermore, in this embodiment, the core is shaped by the core bead 3a having the first resolution, and the contour is shaped by the contour bead 3b having the second resolution. Therefore, compared with the case of shaping the core 11 and the contour 12 with the welding bead 3 having the first resolution, the surface accuracy of the laminated object 10 immediately after laminated manufacturing can be improved. As a result, the amount of finishing work can be reduced, so that the time required for finishing work can be shortened. Also, the manufacturing cost can be reduced. Also, compared with the case of shaping the core 11 and the contour 12 with the welding bead 3 having the second resolution higher than the first resolution, the time required to shape the entire laminated object 10 can be shortened. Therefore, the laminated object 10 can be efficiently manufactured.

[0054] Here, the laser beam L of laser welding is easy to adjust the spot shape. Therefore, when laser welding is used, the resolution of the welding bead 3 can be easily adjusted by adjusting the spot shape of the laser beam L. By increasing the resolution of the welding bead 3, the accuracy of the laminated object 10 can be improved.

[0055] Also, even when electron beam welding is used, the same effects as those when laser welding is used can be achieved. However, laser welding has an advantage in that it can be miniaturized because it does not require a vacuum state compared to electron beam welding. On the other hand, electron beam welding has advantages in that, compared with laser welding, defects can be reduced in the case of metals where the filler material is likely to oxidize because welding is performed in a vacuum state, and the energy efficiency can be made close to 100% because the electron beam is not reflected.

[0056] Also, when arc welding is used, the welding bead 3 can be formed at high speed, so that the time required for shaping the laminated object 10 can be shortened. Also, since the wire W is relatively inexpensive as a filler material, the manufacturing cost can be reduced.

[0057] Furthermore, in the present embodiment, in the contour forming step S14, both the heat source and the filler material are swung to perform weaving welding. Since the welding head 20 may be controlled so that the heat source and the filler material follow the same locus, the control of the weaving welding can be easily performed.

[0058] <Modification Example of the First Embodiment> Here, as a modification example of the first embodiment, for example, the configuration shown in FIG. 10 may be adopted. In this modification example, the contour forming control unit 45 in the additive manufacturing system 1 and the contour forming step S14 in the method for manufacturing the additive manufactured object 10 are different from those in the first embodiment.

[0059] (Contour Forming Control Unit) The contour forming control unit 45 controls the welding head 20 so as to form the contour portion 12 such that the outer surface of the contour portion 12 has an overhang shape that forms an acute angle with respect to the horizontal plane.

[0060] (Procedure of the Method for Manufacturing the Additive Manufactured Object) The method for manufacturing the additive manufactured object 10 is performed in the same order as in the above-described first embodiment. First, the object data acquisition step S11 is performed. After the object data acquisition step S11, the region specifying step S12 is performed. After the region specifying step S12, the operation setting step S13 is performed. After the operation setting step S13, the contour forming step S14 is performed. After the contour forming step S14, the core forming step S15 is performed. After the core forming step S15, a determination of the end of the process is made. Hereinafter, the contour forming step S14, which is different from the first embodiment, will be described.

[0061] (Contour Forming Step) As shown in FIG. 10, in the contour portion shaping step S14, when laminating and shaping the second layer of the contour portion 12, the second layer is laminated and shaped at a position slightly shifted in a direction intersecting the extending direction of the first layer with respect to the first layer. Hereinafter, the direction shifted from the first layer to the second layer may be simply referred to as the "slide direction". Similarly, when laminating and shaping each other layer of the contour portion 12, each layer of the contour portion 12 is sequentially laminated and shaped by slightly shifting it in the slide direction with respect to the previous layer. The contour portion 12 shaped in this way has an overhang shape in which the outer surface forms an acute angle with respect to the horizontal plane. That is, the outer surface of the manufactured laminated object 10 is formed to form an acute angle with respect to the horizontal plane. The angle θ formed between the outer surface of the laminated object 10 and the surface of the stage 2 is, for example, 45 degrees or more and 89 degrees or less.

[0062] (Function and effect) According to this modification, before laminating and shaping the core portion 11, the contour portion 12 can be laminated and shaped in an overhang shape. Since the contour portion 12 forms only the surface of the laminated object 10, it is often lighter than the core portion 11. Therefore, the possibility that the contour portion 12 collapses due to its own weight before solidifying is less than that of the core portion 11. In addition, after the contour portion 12 has solidified, the core portion 11 can be laminated and shaped in an overhang shape. After the core portion 11 is laminated and shaped, the core portion 11 solidifies while being supported by the contour portion 12. Therefore, it is possible to prevent the core portion 11 from collapsing due to its own weight before solidifying. Therefore, the laminated object 10 can be manufactured in an overhang shape without degrading the accuracy of the laminated object 10.

[0063] <Second Embodiment> Hereinafter, the additive manufacturing system 1 and the method for manufacturing the additive manufactured object 10 according to the second embodiment of the present disclosure will be described with reference to FIGS. 11 to 16. For the same components as those in the first embodiment, the same reference numerals are given and the detailed description thereof will be appropriately omitted. The additive manufacturing system 1 of the second embodiment further includes a state detection unit 4, and the additive manufacturing control device 40 does not have the region specifying unit 42 of the first embodiment and further has a surface state acquisition unit 46. The method for manufacturing the additive manufactured object 10 of the second embodiment performs a contour forming step S25 after the core forming step S23, and further includes a surface state acquisition step S24 of acquiring the uneven state of the surface of the core 11 between the core forming step S23 and the contour forming step S25.

[0064] (Additive manufacturing system) As shown in FIG. 11, the additive manufacturing system 1 includes a stage 2, a welding head 20, an additive manufacturing control device 40, and a state detection unit 4.

[0065] (State detection unit) The state detection unit 4 is a device that detects the uneven state of the surface of the core 11. Examples of the uneven state of the surface of the core 11 include the surface roughness of the core 11. Examples of the state detection unit 4 include a sensor, a camera, and the like.

[0066] (Additive manufacturing control device) Subsequently, the configuration of the additive manufacturing control device 40 of the present embodiment will be described with reference to FIG. 12. As shown in FIG. 12, the additive manufacturing control device 40 includes a manufactured object data acquisition unit 41, an operation setting unit 43, a core manufacturing control unit 44, a surface state acquisition unit 46, and a contour manufacturing control unit 45.

[0067] (Surface state acquisition unit) The surface state acquisition unit 46 controls the state detection unit 4 so as to acquire the uneven state of the surface of the core 11.

[0068] (Contour manufacturing control unit) The contour part forming control unit 45 controls the welding head 20 to form the contour part bead 3b while changing the inner peripheral end of the swing width of the weaving welding according to the uneven state of the surface of the core part 11 acquired by the surface state acquisition unit 46.

[0069] (Procedure of the method for manufacturing a laminated object) Hereinafter, the procedure of the method for manufacturing the laminated object 10 using the laminated manufacturing system 1 will be described with reference to the flowchart shown in FIG. 13. The method for manufacturing the laminated object 10 includes a modeling data acquisition step S21, an operation setting step S22, a core part modeling step S23, a surface state acquisition step S24, and a contour part modeling step S25.

[0070] First, the modeling data acquisition step S21 is performed. After the modeling data acquisition step S21, the operation setting step S22 is performed. In the operation setting step S22, the operation setting unit 43 sets the operation of the welding head 20 to separately model the core part 11 and the contour part 12 based on the modeling data.

[0071] After the operation setting step S22, the core part modeling step S23 is performed. As shown in FIG. 14, in the core part modeling step S23, the core part 11 is laminated and modeled with the core part bead 3a. FIG. 14 shows a cross section of the formed core part 11. In the core part modeling step S23, the core part forming control unit 44 controls the welding head 20 based on the setting of the operation setting unit 43 to laminate and model the core part 11.

[0072] After the core part modeling step S23, the surface state acquisition step S24 is performed. As shown in FIG. 15, in the surface state acquisition step S24, the surface state acquisition unit 46 controls the state detection unit 4 to acquire the uneven state of the surface of the core part 11 formed in the immediately preceding core part modeling step S23. FIG. 15 is a view of the core part 11 immediately after modeling as seen from the normal direction. The surface state acquisition unit 46 transmits the information on the acquired uneven state to the contour part forming control unit 45.

[0073] After the surface state acquisition step S24, a contour portion shaping step S25 is performed. As shown in FIG. 16, in the contour portion shaping step, the contour portion 12 is laminated and shaped on the surface of the core portion 11 shaped in the immediately preceding core portion shaping step S23 by the contour portion bead 3b. FIG. 16 is a schematic view of the contour portion 12 during shaping as viewed from the normal direction. In the contour portion shaping step S25, the contour portion shaping control unit 45 controls the welding head 20 based on the setting of the operation setting unit 43 and the uneven state of the surface of the core portion 11, and laminates and shapes the contour portion 12. The contour portion shaping control unit 45 controls the welding head 20 according to the uneven state of the surface of the core portion 11, and forms the contour portion bead 3b while changing the inner peripheral end of the swing width of the weaving welding.

[0074] After the contour portion shaping step S25, a determination of the end of the process is made. In the determination of the end of the process, the lamination shaping control device 40 determines whether the manufacturing of the laminated shaped object 10 has been completed based on the shaped object data (step S26). When the lamination shaping control device 40 determines that the manufacturing of the laminated shaped object 10 has not been completed (step S26; NO), it proceeds to the core portion shaping step S23.

[0075] When the lamination shaping control device 40 determines that the manufacturing of the laminated shaped object 10 has been completed (step S26; YES), it ends the operation of the welding head 20. Thereafter, finishing processing is performed on the surface of the laminated shaped object 10. In this way, the manufacturing of the laminated shaped object 10 is completed.

[0076] (Function and Effect)

[0077] According to the second embodiment, after the core portion 11 is laminated and shaped, the contour portion 12 can be laminated and shaped. Thereby, even if a bulge occurs on the side surface of the core portion 11, the bulge on the side surface of the core portion 11 can be absorbed by shaping the contour portion 12. Therefore, the surface accuracy of the laminated shaped object 10 can be improved.

[0078] Also, in the second embodiment, a method is adopted in which the uneven state of the surface of the core portion 11 is acquired, and based on this, the contour portion bead 3b is formed while changing the inner peripheral end of the swing width of the weaving welding. Therefore, the undulation on the side surface of the core part 11 can be more appropriately absorbed by the shape of the contour part 12, and the surface on the side opposite to the core part 11 of the contour part 12 can be made into a smooth surface. Thereby, the outer surface of the laminated object 10 can be made into a smooth surface. Therefore, the surface accuracy of the laminated object 10 can be further improved.

[0079] <Modification Example of the Second Embodiment> Here, as a modification example of the second embodiment, for example, the configuration shown in FIG. 17 may be adopted. In this modification example, the contour part shape control unit 45 in the laminated manufacturing system 1 and the contour part shaping step S25 in the manufacturing method of the laminated object 10 are different from those in the second embodiment.

[0080] (Contour Part Shape Control Unit) As shown in FIG. 17, the contour part shape control unit 45 controls the welding head 20 so as to laminate and shape the contour part 12 having an outer surface that smoothly curves with respect to the side surface of the core part 11. FIG. 17 is a view of the contour part 12 during shaping as seen from the normal direction.

[0081] (Procedure of the Manufacturing Method of the Laminated Object) The manufacturing method of the laminated object 10 is performed in the same order as in the second embodiment described above. First, the object data acquisition step S21 is performed. After the object data acquisition step S21, the operation setting step S22 is performed. After the operation setting step S22, the core part shaping step S23 is performed. After the core part shaping step S23, the surface state acquisition step S24 is performed. After the surface state acquisition step S24, the contour part shaping step S25 is performed. After the contour part shaping step S25, a determination of the end of the process (step S26) is performed. Hereinafter, the contour part shaping step S25, which is different from the second embodiment, will be described.

[0082] (Contour Part Shaping Step) In the contour part shaping step S25, the contour part shape control unit 45 controls the welding head 20 to laminate and shape the contour part 12 so as to absorb the undulation on the side surface of the core part 11. Further, the contour part 12 is laminated and shaped so as to have an outer surface that smoothly curves with respect to the side surface of the core part 11.

[0083] (Function and effect) Moreover, according to this modified example, while absorbing the unevenness on the side surface of the core part 11, it is possible to perform laminated molding of the contour part 12 having an outer surface that is smoothly curved with respect to the side surface of the core part 11. Thereby, while improving the surface accuracy of the laminated molded object 10, the laminated molded object 10 can be manufactured in an arbitrary shape.

[0084] Note that FIG. 18 is a hardware configuration diagram showing the configuration of the computer 1100 according to the present embodiment. The computer 1100 includes a processor 1110, a main memory 1120, a storage 1130, and an interface 1140.

[0085] The above-described laminated molding control device 40 is implemented in a computer. And the operations of the above-described respective processing units are stored in the storage 1130 in the form of a program. The processor 1110 reads the program from the storage 1130, expands it in the main memory 1120, and executes the above processing according to the program. Further, the processor 1110 secures a storage area in the main memory 1120 according to the program.

[0086] The program may be for realizing a part of the functions to be exerted by the computer. For example, the program may exert functions by combination with other programs already stored in the storage 1130 or by combination with other programs implemented in other devices. Further, in addition to or instead of the above configuration, the computer may include a custom LSI (Large Scale Integrated Circuit) such as a PLD (Programmable Logic Device). Examples of the PLD include PAL (Programmable Array Logic), GAL (Generic Array Logic), CPLD (Complex Programmable Logic Device), and FPGA (Field Programmable Gate Array). In this case, part or all of the functions realized by the processor 1110 may be realized by the integrated circuit.

[0087] Examples of the storage 1130 include a magnetic disk, a magneto-optical disk, a semiconductor memory, etc. The storage 1130 may be an internal medium directly connected to the bus of the computer, or may be an external medium connected to the computer via the interface 1140 or a communication line. Further, when the program is distributed to the computer via a communication line, the computer that has received the distribution may expand the program in the main memory 1120 and execute the above processing.

[0088] Also, the program may be for realizing a part of the functions described above. Furthermore, the program may be a so-called difference file (difference program) that realizes the functions described above in combination with other programs already stored in the storage 1130.

[0089] (Other Embodiments) As described above in detail with reference to the drawings for the embodiments of the present disclosure, the specific configuration is not limited to this embodiment, and design changes and the like within the scope not departing from the gist of the present disclosure are also included. In the above embodiment, the surface of the stage 2 is assumed to be along the horizontal plane, but it is not limited to this, and for example, it may be inclined with respect to the horizontal plane.

[0090] In the above embodiment, the filler material is assumed to be a metal material, but it is not limited to this, and for example, it may be a resin material.

[0091] In the above embodiment, the contour bead 3b is assumed to be formed in a rectangular shape with the welding direction as the short side direction when viewed from the normal direction, but it is not limited to this. The contour bead 3b may be formed, for example, in an elliptical shape with the welding direction as the minor axis direction or in a circular shape when viewed from the normal direction.

[0092] In the above embodiment, the contour bead 3b and the core bead 3a are assumed to be formed by the same filler material, but it is not limited to this, and they may be formed by different filler materials.

[0093] In the above embodiment, the core bead 3a is assumed to be formed by straight welding, but it is not limited to this, and the core bead 3a may be formed, for example, by weaving welding in the same manner as the contour bead 3b.

[0094] In the above embodiment, the filler material is the powder P when the welding head 20 is the laser welding head 20a, but it is not limited to this, and for example, the filler material may be the wire W. Also, the filler material is the wire W when the welding head 20 is the arc welding head 20b, but it is not limited to this, and for example, the filler material may be the powder P.

[0095] In the above-described embodiment, when shaping the core part 11 and the contour part 12, only the welding head 20 is operated. However, the present invention is not limited to this. For example, the stage 2 may be operated, or both the welding head 20 and the stage 2 may be operated.

[0096] In the above-described embodiment, after partially laminating and shaping the core part 11, the contour part 12 is laminated and shaped. However, the present invention is not limited to this. For example, after laminating and shaping all of the core part 11, the contour part 12 may be laminated and shaped.

[0097] In the core part shaping step S23 of the above-described embodiment, it is assumed that all of the formed plurality of core part beads 3a have substantially the same resolution. However, the present invention is not limited to this. For example, the core part 11 may be subdivided into a plurality of regions, and the resolution of the core part beads 3a may be changed for each region.

[0098] In the above-described embodiment, in one core part shaping step S23, the core part 11 is formed in multiple layers. However, the present invention is not limited to this. In one core part shaping step S23, only one layer of the core part 11 may be formed.

[0099] In the contour part shaping step S25 of the above-described embodiment, it is assumed that all of the formed plurality of contour part beads 3b have substantially the same resolution. However, the present invention is not limited to this. For example, the contour part 12 may be subdivided into a plurality of regions, and the resolution of the contour part beads 3b may be changed for each region.

[0100] In the above-described embodiment, the second resolution of the contour part bead 3b is higher than the first resolution of the core part bead 3a. However, the present invention is not limited to this. The contour part bead 3b and the core part bead 3a may be formed with the same resolution.

[0101] In the weaving welding of the above-described embodiment, although the heat source and the filler material are swung in a direction orthogonal to the welding direction, the present invention is not limited thereto. In weaving welding, the heat source and the filler material may be swung, for example, in an 8-shaped manner as viewed from the normal direction, in a circular shape as viewed from the normal direction, in a U-shaped manner that opens in the welding direction as viewed from the normal direction, or in an asymmetric shape that straddles the welding direction as viewed from the normal direction.

[0102] In the weaving welding of the above-described embodiment, although it is assumed that both the heat source and the filler material are swung, the present invention is not limited thereto, and it may be performed by swinging only the heat source, or it may be performed by swinging only the filler material. When only the heat source is swung, the stability of the shaping can be improved. When only the filler material is swung, the heat input controllability can be improved.

[0103] <Appendix> The method for manufacturing the laminated object 10 and the laminating system 1 described in each embodiment are understood, for example, as follows.

[0104] (1) The method for manufacturing the laminated object 10 according to the first aspect includes a contour shaping step S14, S25 of laminating and shaping a contour portion 12, which is a portion outside the laminated object 10, with a contour bead 3b formed by weaving welding, and a core shaping step S15, S23 of laminating and shaping a core portion 11, which is a portion inside the laminated object 10, with a core bead 3a formed by welding.

[0105] Thereby, the contour bead 3b can be formed by weaving welding, and the contour portion 12 can be formed more densely.

[0106] (2) The method for manufacturing the laminated object 10 according to the second aspect is the method for manufacturing the laminated object 10 in (1), and the core shaping step S15 may be performed after the contour shaping step S14.

[0107] Thus, after the contour portion 12 is laminated and formed, the core portion 11 can be laminated and formed. Therefore, the core portion 11 can be formed such that the side surface of the core portion 11 is supported by the contour portion 12. For this reason, it is possible to suppress the occurrence of sagging due to its own weight on the side surface of the core portion 11. Therefore, the surface accuracy of the laminated object 10 can be improved.

[0108] (3) The method for manufacturing the laminated object 10 according to the third aspect is the method for manufacturing the laminated object 10 according to (2), wherein in the contour portion forming step S14, the contour portion 12 may be formed so that the outer surface of the contour portion 12 has an overhang shape that forms an acute angle with respect to the horizontal plane.

[0109] Thereby, before the core portion 11 is laminated and formed, the contour portion 12 can be laminated and formed in an overhang shape.

[0110] (4) The method for manufacturing the laminated object 10 according to the fourth aspect is the method for manufacturing the laminated object 10 according to (1), and the contour portion forming step S25 may be performed after the core portion forming step S23.

[0111] Thereby, after the core portion 11 is laminated and formed, the contour portion 12 can be laminated and formed. Thereby, even if undulations occur on the side surface of the core portion 11, the undulations on the side surface of the core portion 11 can be absorbed by forming the contour portion 12.

[0112] (5) The method for manufacturing the laminated object 10 according to the fifth aspect is the method for manufacturing the laminated object 10 according to (4), further including a surface state acquisition step S24 for acquiring the uneven state of the surface of the core portion 11 between the core portion forming step S23 and the contour portion forming step S25, and in the contour portion forming step S25, the inner peripheral end of the swing width of the weaving welding may be changed according to the uneven state of the surface of the core portion 11 acquired in the surface state acquisition step S24 while forming the contour portion bead 3b.

[0113] Accordingly, the contour portion 12 can be shaped according to the surface state of the core portion 11. Therefore, while absorbing the undulation on the side surface of the core portion 11, the surface on the side opposite to the core portion 11 of the contour portion 12 can be made into a smooth surface. Thereby, the outer surface of the laminated object 10 can be made into a smooth surface.

[0114] (6) The manufacturing method of the laminated object 10 according to the sixth aspect is the manufacturing method of the laminated object 10 according to any one of (1) to (5), and in the core portion shaping step S15, the core bead 3a is formed at a first resolution, and in the contour portion shaping step S14, the contour bead 3b may be formed at a second resolution higher than the first resolution.

[0115] Thereby, compared with the case where the core portion 11 and the contour portion 12 are shaped by the welding bead 3 having the first resolution, the surface accuracy of the laminated object 10 immediately after laminated manufacturing can be improved. Also, compared with the case where the core portion 11 and the contour portion 12 are shaped by the welding bead 3 having the second resolution, the time required to shape the entire laminated object 10 can be shortened. Therefore, the laminated object 10 can be manufactured efficiently.

[0116] (7) The manufacturing method of the laminated object 10 according to the seventh aspect is the manufacturing method of the laminated object 10 according to any one of (1) to (6), and the core portion shaping steps S15, S23 and the contour portion shaping steps S14, S25 may be performed by laser welding or electron beam welding.

[0117] By adjusting the spot shape of the laser beam L, the resolution of the welding bead 3 can be easily adjusted. By increasing the resolution of the welding bead 3, the accuracy of the laminated object 10 can be improved.

[0118] (8) The manufacturing method of the laminated object 10 according to the eighth aspect is the manufacturing method of the laminated object 10 according to any one of (1) to (6), and the core portion shaping steps S15, S23 and the contour portion shaping steps S14, S25 may be performed by arc welding.

[0119] As a result, the welding bead 3 can be formed at high speed, so that the time required for forming the laminated object 10 can be shortened.

[0120] (9) The laminated manufacturing system 1 according to the ninth aspect includes a welding head 20 and a laminated manufacturing control device 40 that controls the welding head 20 so that the welding head 20 manufactures the laminated object 10. The laminated manufacturing control device 40 includes a contour part manufacturing control part 45 that controls the welding head 20 so as to laminate and manufacture a contour part 12, which is a part outside the laminated object 10, with a contour part bead 3b formed by weaving welding, and a core part manufacturing control part 44 that controls the welding head 20 so as to laminate and manufacture a core part 11, which is a part inside the laminated object 10, with a core part bead 3a formed by welding.

[0121] (10) The laminated manufacturing system 1 according to the tenth aspect is the laminated manufacturing system 1 according to (9), and the core part manufacturing control part 44 may control the welding head 20 so as to laminate and manufacture the core part 11 after the contour part 12 is laminated and manufactured.

[0122] (11) The laminated manufacturing system 1 according to the eleventh aspect is the laminated manufacturing system 1 according to (10), and the contour part manufacturing control part 45 may control the welding head 20 so as to manufacture the contour part 12 so that the outer surface of the contour part 12 has an overhang shape that forms an acute angle with respect to the horizontal plane.

[0123] (12) The laminated manufacturing system 1 according to the twelfth aspect is the laminated manufacturing system 1 according to (9), and the contour part manufacturing control part 45 may control the welding head 20 so as to laminate and manufacture the contour part 12 after the core part 11 is laminated and manufactured.

[0124] (13) The additive manufacturing system 1 of the 13th aspect is the additive manufacturing system 1 of (12), wherein the additive manufacturing control device 40 further includes a surface state acquisition unit 46 that acquires the uneven state of the surface of the core part 11, and the contour part manufacturing control unit 45 controls the welding head 20 to form the contour part bead 3b while changing the inner peripheral end of the swing width of the weaving welding according to the uneven state of the surface of the core part 11 acquired by the surface state acquisition unit 46.

[0125] (14) The additive manufacturing system 1 of the 14th aspect is the additive manufacturing system 1 of any one of (9) to (13), wherein the core part manufacturing control unit 44 controls the welding head 20 to form the core part bead 3a at a first resolution, and the contour part manufacturing control unit 45 controls the welding head 20 to form the contour part bead 3b at a second resolution higher than the first resolution.

[0126] (15) The additive manufacturing system 1 of the 15th aspect is the additive manufacturing system 1 of any one of (9) to (14), wherein the welding head 20 may be a laser welding head 20a that performs additive manufacturing by laser welding.

[0127] (16) The additive manufacturing system 1 of the 16th aspect is the additive manufacturing system 1 of any one of (9) to (14), wherein the welding head 20 may be an arc welding head 20b that performs additive manufacturing by arc welding or an electron beam forming head that performs additive manufacturing by electron beam welding.

Explanation of Signs

[0128] 1... Additive manufacturing system 2... Stage 3... Weld bead 3a... Core bead 3b... Contour bead 4... Condition detection unit 10... Additive manufactured object 11... Core part 12... Contour part 20... Welding head 20a... Laser welding head 20b... Arc welding head 21... Head body 22... Laser source 23... Laser passage 24... Powder supply passage 26... Electrode 27... Wire insertion passage 40... Additive manufacturing control device 41... Manufactured object data acquisition unit 42... Region specification unit 43... Operation setting unit 44... Core part manufacturing control unit 45... Contour part manufacturing control unit 46... Surface condition acquisition unit 1110... Processor 1120... Main memory 1130... Storage 1140... Interface A... Arc L... Laser beam P... Powder S11, S21... Manufactured object data acquisition process S12... Region specification process S13, S22... Operation setting process S14, S25... Contour part manufacturing process S15, S23... Core part manufacturing process S24... Surface condition acquisition process W... Wire W1... Width W2... Width

Claims

1. A contour portion forming step of forming a contour portion, which is an outer portion of a laminated object, by a plurality of continuously formed contour portion beads in a welding direction by weaving welding; A core portion forming step of forming a core portion, which is an inner portion of the laminated object, by a core portion bead formed in the welding direction by straight welding; A method for manufacturing a laminated object, including the above steps.

2. The method for manufacturing a laminated object according to Claim 1, wherein the core portion forming step is performed after the contour portion forming step.

3. The method for manufacturing a laminated object according to Claim 2, wherein in the contour portion forming step, the contour portion is formed so that an outer surface of the contour portion has an overhang shape that forms an acute angle with a horizontal plane.

4. The method for manufacturing a laminated object according to Claim 1, wherein the contour portion forming step is performed after the core portion forming step.

5. The method further includes a surface state acquisition step of acquiring an uneven state of a surface of the core portion between the core portion forming step and the contour portion forming step; In the contour portion forming step, the contour portion bead is formed while changing an inner peripheral end of a swing width of the weaving welding according to the uneven state of the surface of the core portion acquired in the surface state acquisition step. The method for manufacturing a laminated object according to Claim 4.

6. In the core portion forming step, the core portion bead is formed at a first resolution; In the contour portion forming step, the contour portion bead is formed at a second resolution higher than the first resolution. The method for manufacturing a laminated object according to any one of Claims 1 to 5.

7. The method for manufacturing a laminated object according to any one of Claims 1 to 6, wherein the core portion forming step and the contour portion forming step are performed by laser welding or electron beam welding.

8. The method for manufacturing a laminated object according to any one of Claims 1 to 6, wherein the core portion forming step and the contour portion forming step are performed by arc welding.

9. In the core portion forming step, the core portion bead is formed so that a width in a direction orthogonal to the welding direction and a vertical direction is larger than a width of the contour portion bead in the welding direction. The method for manufacturing a laminated object according to any one of Claims 1 to 8.

10. A welding head; A lamination control device that controls the welding head so that the welding head forms a laminated object; Comprising; The lamination control device is A contour part control unit that controls the welding head so that a contour part, which is an outer part of the laminated object, is laminated and formed by contour part beads that are continuously formed in a plurality in the welding direction by weaving welding; A core part control unit that controls the welding head so that a core part, which is an inner part of the laminated object, is laminated and formed by core part beads that are formed in the welding direction by straight welding; A laminated manufacturing system having the above.

11. The laminated manufacturing system according to claim 10, wherein the core part control unit controls the welding head so that the core part is laminated and formed after the contour part is laminated and formed.

12. The laminated manufacturing system according to claim 11, wherein the contour part control unit controls the welding head so that the contour part is shaped so that an outer surface of the contour part has an overhang shape that forms an acute angle with respect to a horizontal plane.

13. The laminated manufacturing system according to claim 10, wherein the contour part control unit controls the welding head so that the contour part is laminated and formed after the core part is laminated and formed.

14. The laminated manufacturing apparatus further includes: A surface state acquisition unit that acquires an uneven state of a surface of the core part, The laminated manufacturing system according to claim 13, wherein the contour part control unit controls the welding head so as to form the contour part beads while changing an inner peripheral end of a swing width of the weaving welding according to the uneven state of the surface of the core part acquired by the surface state acquisition unit.

15. The core part control unit controls the welding head so as to form the core part beads at a first resolution, The laminated manufacturing system according to any one of claims 10 to 14, wherein the contour part control unit controls the welding head so as to form the contour part beads at a second resolution higher than the first resolution.

16. The laminated manufacturing system according to any one of claims 10 to 15, wherein the welding head is a laser welding head that performs laminated manufacturing by laser welding or an electron beam forming head that performs laminated manufacturing by electron beam welding.

17. The laminated manufacturing system according to any one of claims 10 to 15, wherein the welding head is an arc welding head that performs laminated manufacturing by arc welding.

18. The core part shape control unit controls the welding head so as to form the core bead such that the width in the direction orthogonal to the welding direction and the vertical direction is larger than the width in the welding direction of the contour bead, in the laminating manufacturing system according to any one of claims 10 to 17.

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