JP2019076912A - Manufacturing method for laminate-molded component, joint method for laminate-molded component, laminate-molded component, and structure - Google Patents

Abstract

To provide a manufacturing method for laminate-molded components which enables mutual joint at a sufficient joint strength and reduction in cost, a joint method for laminate-molded components, laminate-molded components, and a structure.SOLUTION: Laminate-molded components W1, W2 are manufactured by a step of molding a body part 51 by repeatedly stacking a weld bead layer 43 formed of weld beads 25 where a filler material is fused and coagulated by using arc, and a step of molding, at the edge of the body part 51, a joint part 53 for welding with a joint counterpart by stacking the weld bead layer 43.SELECTED DRAWING: Figure 2A

Description

  The present invention relates to a method of manufacturing a laminate-molded part, a method of joining the laminate-molded part, a laminate-molded part, and a structure.

  In recent years, the need for 3D printers as a means of production has been increasing, and in particular, application to metal materials is being researched and developed for practical use in the aircraft industry and the like. In a 3D printer using a metal material, a metal powder or metal wire is melted using a heat source such as a laser or an arc, and molten metals are laminated to form a shaped object.

  As a technique for forming such a shaped object, there is known a welding technique in which molten metals are laminated to form a shaped object by moving a welding torch supplying a filler material (see, for example, Patent Document 1) ). Moreover, the technique which welds by forming at least one groove surface of the coupling of a to-be-welded member in an uneven | corrugated shaped surface is known (for example, refer patent document 2).

Japanese Patent Laid-Open No. 2000-15363 JP 2001-246486 A

  By the way, when welding and joining parts consisting of laminate-molded articles of various shapes formed by the technique of Patent Document 1, in general welding by butt welding, the joint is fragile due to residual stress or the like in the cross section of the joint. It can be Further, as described in Patent Document 2, it is difficult to secure sufficient strength simply by forming at least one grooved surface of the parts to be joined to each other into a concavo-convex shape surface, and cutting, etc. In order to form the uneven surface by post-processing, the number of processing steps increases, resulting in an increase in cost.

  The present invention has been made in view of the above-described circumstances, and an object thereof is a method of manufacturing a laminate-molded part capable of bonding laminate-molded parts to each other with sufficient bonding strength and achieving cost reduction. It is providing a bonding method of a laminate-molded part, a laminate-molded part, and a structure.

The present invention has the following constitution.
(1) forming a main body portion by repeatedly laminating a weld bead layer formed by weld beads obtained by melting and solidifying a filler metal using an arc;
A step of forming a joint on the edge of the main body to form a joint for welding with a joining partner by laminating the welding bead layer;
The manufacturing method of the lamination-molded part which has.
(2) A bonding method for bonding a pair of the layered molded parts described in (1) to each other,
A laminated molded component in which the joint formed in one of the layered molded parts and the joint formed in the other are butted, and the adjacent joints are welded along the longitudinal direction of the joint. Bonding method.
(3) A laminated molded component in which welding bead layers formed from welding beads obtained by melting and solidifying a filler material are laminated and joined together,
Body part,
A joint for welding with a joining partner at an edge of the main body;
A laminated molding component having a.
(4) A structure in which the joint portions of the pair of layered shaped parts described in (3) are butted to be welded.

  According to the present invention, the laminate-molded parts can be bonded to each other with a sufficient bonding strength, and moreover, cost reduction can be achieved.

It is a block diagram of the manufacturing apparatus used for preparation of a lamination-molded part. It is a disassembled perspective view of the lamination-molding part which shows one structural example of a structure. It is a whole perspective view which shows one structural example of a structure. It is a schematic diagram of the coupling part explaining the joint strength of layered production fabrication parts. It is a perspective view of a base plate and a lamination fabrication part for explaining a preparation procedure of a lamination fabrication part. It is process explanatory drawing which shows typically the procedure which joins the coupling parts of a lamination-molding part by groove-joining. It is process explanatory drawing which shows typically the procedure which joins the coupling parts of a lamination-molding part by groove-joining. It is process explanatory drawing which shows typically the procedure which joins the coupling parts of a lamination-molding part by groove-joining. It is process explanatory drawing which shows typically the procedure which joins the coupling parts of a lamination-molding part by backing metal joining. It is process explanatory drawing which shows typically the procedure which joins the coupling parts of a lamination-molding part by backing metal joining. It is process explanatory drawing which shows typically the procedure which joins the coupling parts of a lamination-molding part by backing metal joining. It is a perspective view which shows the other structural example of a structure.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic diagram of a manufacturing system for manufacturing the structure of the present invention.
The manufacturing system 100 of the present configuration includes a layered manufacturing apparatus 11 and a controller 15 that generally controls the layered manufacturing apparatus 11.

  The layered shaping apparatus 11 has a welding robot 19 having a torch 17 at its tip end axis, and a filler material supply unit 21 for supplying a filler material (welding wire) M to the torch 17.

  The controller 15 has a CAD / CAM unit 31, a trajectory calculation unit 33, a storage unit 35, and a control unit 37 to which these are connected.

  The welding robot 19 is an articulated robot, and the welding material M is supported so as to be continuously supplied to the torch 17 provided on the tip end shaft. The position and posture of the torch 17 can be arbitrarily set three-dimensionally in the range of the degree of freedom of the robot arm.

  The torch 17 has a shield nozzle (not shown), and shield gas is supplied from the shield nozzle. The arc welding method may be any of consumable electrode methods such as coated arc welding and carbon dioxide gas arc welding, and non-consumable electrode methods such as TIG welding and plasma arc welding. Be done.

  For example, in the case of the consumable electrode type, the contact tip is disposed inside the shield nozzle, and the filler material M to which the melting current is supplied is held by the contact tip. The torch 17 generates an arc from the tip of the filler material M in a shield gas atmosphere while holding the filler material M. The filler material M is fed from the filler material supply unit 21 to the torch 17 by a feeding mechanism (not shown) attached to a robot arm or the like. Then, while the torch 17 is moved, when the filler material M continuously fed is melted and solidified, a linear welding bead 25 which is a molten solid of the filler material M is formed on the base plate 41.

  After creating the shape data of the layered production part W to be produced, the CAD / CAM unit 31 divides it into a plurality of layers and generates layer shape data representing the shape of each layer. The trajectory calculation unit 33 obtains a movement trajectory of the torch 17 based on the generated layer shape data. The storage unit 35 stores data such as the generated layer shape data and the movement trajectory of the torch 17.

  The control unit 37 executes a drive program based on the layer shape data stored in the storage unit 35 and the movement trajectory of the torch 17 to drive the welding robot 19.

  The control unit 37 executes a drive program based on the layer shape data stored in the storage unit 35 and the movement trajectory of the torch 17 to drive the welding robot 19. That is, the welding robot 19 moves the torch 17 while melting the filler material M with an arc based on the movement trajectory of the torch 17 generated by the trajectory calculation unit 33 according to a command from the controller 15. In addition, in FIG. 1, a mode that the welding bead layer 43 which consists of several welding bead 25 is laminated | stacked on the baseplate 41 which consists of steel plates, and the cylindrical laminated-shaped shaping | molding component W is modeled is shown.

Next, a structure formed of the above-described layered production part W will be described.
One structural example of the structure is shown in FIG. 2A. Here, another laminated molded component W2 is prepared separately from the above-described laminated structural component W (here, referred to as W1 for distinction). A structure 61 shown in FIG. 2B is formed by joining these layered shaped parts W1, W2 to each other. Note that each of the layered shaped parts W1 and W2 is shaped by the manufacturing system 100 described above.

  The layered production parts W1 and W2 each have a cylindrical main body 51 and a joint 53 formed on the main body 51. The joint portion 53 has a plurality of rod-like portions 55, and the rod-like portions 55 are provided at equal intervals in the circumferential direction at one axial end which is an edge of the main body 51, It protrudes in the axial direction from the axial direction one end part of the main-body part 51, and is formed. The rod portion 55 of the layered production part W1 and the rod portion 55 of the layered formation part W2 are engaged with each other and joined by welding.

  That is, as shown in FIG. 2B, the two layered shaped components W1 and W2 are brought into a state in which the rod-like portions 55 of the joint portion 53 are engaged with each other by approaching from the state where the joint portion 53 faces each other. . Specifically, the rod-like portion 55 of the joint portion 53 of the layered production part W2 is inserted between the rod-like portions 55 of the joint portion 53 of the layered production part W1. As a result, the rod-like portion 55 of the joint portion 53 of the layered production part W1 is inserted between the rod-like portions 55 of the joint portion 53 of the layered formation part W2. And rod-shaped part 55 comrades which mutually adjoin each other of the joint part 53 of these lamination molding parts W1 and W2 are welded. As a result, the layered production part W1 and the layered formation part W2 become an integral structure 61 by joining the joint portions 53 to each other.

Here, the joint strength of the laminate-molded parts W1 and W2 of the structure 61 having the above configuration will be described.
As shown in FIG. 3, the tensile force of the laminated molded parts W1 and W2 is P, the axial length of the rod-shaped portion 55 of the laminated molded parts W1 and W2 is L1 (in the illustrated example, a linear portion is shown), the rod-shaped portion 55 The thickness of the sheet is a (not shown). When the rod-like portions 55 of the joint portion 53 of the layered shaped parts W1 and W2 are welded along the axial direction, the shear stress τ of the welded portion with respect to the tensile load P is expressed by the following equation (1).

  In general, the tensile stress σ and the shear stress τ have the relationship of the following equation (2).

  On the other hand, for example, in the case where the end faces of the laminated molded parts W1 and W2 of cylindrical shape are butted and the end faces are welded, assuming that the bonding length in the circumferential direction is L2 (not shown) The stress σ is given by the following equation (3).

  From this, the circumferential lengths of the laminated and formed parts W1 and W2 are substantially constant if they have the same diameter, and when welding the end faces, a tensile stress corresponding to the applied tensile load P is generated. On the other hand, if the rod-like portions 55 are welded along the axial direction, the number of the rod-like portions 55 and the axial length L1 can be increased regardless of the diameters of the layered shaped parts W1 and W2. Therefore, the shear stress τ generated in the weld line can be easily reduced, and the bonding strength can be easily increased as compared with the case where the end faces are welded.

  As described above, according to the layered manufacturing component of the present embodiment, the weld bead layer 43 formed of the weld bead 25 is laminated, and the joint portion 53 with the bonding partner is provided in the main body portion 51. By welding this joint portion 53, it is possible to join with the joining partner with high strength. Therefore, compared with the case where a joint part is formed by post-processing such as cutting, the joint part 53 can be formed with a smaller number of processing steps, and a laminate-molded part can be manufactured at low cost.

  Then, by engaging and welding the rod-like portions 55 of the layered production component with each other, the bonding area can be easily increased as compared with the case in which the end faces are simply butt-welded. Therefore, bonding with higher bonding strength is possible.

  Further, according to the structure 61 in which the joint parts 53 of the layered molded parts are welded, the part welded and joined in the joint part 53 is more than the case where the joint part is formed by post processing such as cutting. It can be manufactured with a small number of processing steps. Therefore, the structure 61 in which the laminate-molded parts are joined with high strength can be obtained at low cost. In addition to welding along the axial direction, welding of the rod-like portions 55 may be performed along the circumferential direction. In that case, the bonding strength is further improved, and the sealability of the bonding portion is also enhanced.

Next, a procedure for forming the above-described layered production parts W1, W2 will be described.
In addition, since all of the laminate-molded parts W1 and W2 are manufactured by the same manufacturing method, the case of manufacturing the laminate-molded part W1 will be described here. FIG. 4 is a perspective view of the base plate 41 and the layered production part W1 for explaining the manufacturing procedure of the layered formed part W1.

  The CAD / CAM unit 31 shown in FIG. 1 has shape data of the layered production part W1 shown in FIG. 4, and based on this shape data, each layer P (1), P (2), ..., generate layer shape data of P (n).

  Next, the trajectory calculation unit 33 generates a movement trajectory of the torch 17 (see FIG. 1) in each layer P (1), P (2),..., P (n) based on each layer shape data, Generate 19 drive programs. Then, the control unit 37 drives the welding robot 19 based on the generated drive program.

  The torch 17 is moved along the movement trajectory of the first layer on the base plate 41 to form a weld bead layer 43 of the first layer. In this case, the filler material M and the base plate 41 are melted by the arc, and the filler material M is raised and mounted on the base plate 41. The first layer on the base plate 41 is formed in an appropriate order determined by the trajectory calculation unit 33.

  Thereafter, similarly, the torch 17 is moved along the movement locus forming the welding bead layer 43 of the plurality of layers P (1), P (2),. , P (2),..., P (n) are sequentially laminated. Finally, the nth weld bead layer 43 is formed. When forming the joint portion 53, in each welding bead layer 43, the welding bead layer 43 is intermittently formed by the torch 17 moved along the movement locus. Thereby, from the upper end of the main body portion 51, a plurality of rod-like portions 55 in which the welding bead layers 43 formed intermittently in the circumferential direction are stacked are formed. Thereby, the rod-like portion 55 is shaped by laminating the welding bead layer 43 in the joining direction.

  By the above-described lamination molding process, the lamination molding part W1 in which the joint portion 53 having the plurality of rod portions 55 is formed at one axial end of the cylindrical main body 51 is formed. In addition, the base plate 41 is cut by a cutting machine using a wire saw, a diamond cutter, or the like, as necessary, to obtain a laminated molded component W1 having a desired shape.

  In addition, the rod-shaped portion 55 is not limited to only one end portion in the axial direction of the layered production part W1, and may be provided at an appropriate position as needed.

Next, various bonding modes of the laminated and formed parts W1, W2 will be described.
(Gap joint)
Drawing 5A-Drawing 5C are process explanatory views showing typically the procedure of joining joints part 53 comrades of layered production parts by groove joint. The figure shows a state in which the joint portion 53 disposed in a cylindrical shape is developed on a plane. In the case of this configuration, the joint portion 53 is formed to have a plurality of welding bead layers also in the radial direction.

  As shown in FIG. 5A, when the layered molding component is bonded to each other, the circumferential direction both side portions of the rod portion 55 to be the joint portion 53 are along the longitudinal direction of the rod portion 55 (axial direction of the layered molding component) The taper portion 57 is formed. The tapered portion 57 has a shape in which the axial cross section gradually spreads radially outward.

  Next, as shown to FIG. 5B, the lamination-modeling components which have the coupling part 53 in which the taper part 57 was formed in the rod-shaped part 55 are mutually abutted so that each rod-shaped part 55 may mesh. As a result, the V-shaped groove (double-sided groove) 63 is formed by the tapered portion 57 between the adjacent rod-like portions 55.

  Then, as shown in FIG. 5C, the V-shaped groove 63 between the adjacent rod-shaped portions 55 is welded, and the rod-shaped portions 55 are joined together by the welding portion 65. Thereby, the rod-like parts 55 of the respective joint parts 53 are welded to each other in the pair of layered production parts, and the rod-like parts 55 form a structure 61 firmly joined.

  In addition, a re-shaped groove (one-side groove) may be formed between the rod-shaped portions 55. For example, when the tapered portion 57 is formed only in the rod-like portion 55 of the joint portion 53 of one layered molded component, when the rod-shaped portions 55 of a pair of layered modeled components are engaged with each other, A re-shaped groove is formed. Even in this case, by welding reed-shaped grooves formed between adjacent rod-like portions 55 and joining the rod-like portions 55 to each other, a structure 61 in which the laminated and formed component is firmly joined can be obtained.

  As described above, in the groove bonding, when the rod-like portions 55 are engaged with each other, the tapered portion 57 serving as the V-shaped groove 63 for welding is formed in the rod-like portion 55. Then, the rod portions 55 are engaged with each other to form a V-shaped groove 63, and the V-shaped groove 63 is welded. As a result, a higher strength structure 61 is obtained in which the welding strength between the rod-like portions 55 is further enhanced.

(Back metal connection)
FIG. 6A to FIG. 6C are process explanatory views showing a procedure for joining the joint portions 53 of the layered manufacturing component by backing metal bonding. The figure shows a state in which the joint portion 53 disposed in a cylindrical shape is developed on a plane.

  As shown in FIG. 6A, for example, when forming a laminate-molded part that is one of a pair of laminate-molded parts to be bonded to each other, the backing metal part 67 is formed along the longitudinal direction of the rod-like part 55 of the joint part 53. Keep it. The backing metal portion 67 protrudes from both circumferential side portions of the rod portion 55 on the inner peripheral side of the rod portion 55. The rod-like portion 55 in the joint portion 53 of the other layered molded part is formed in a rod-like or plate-like shape.

  Next, as shown in FIG. 6B, the pair of layered production parts are butted against each other so that the respective rod-like parts 55 engage with each other. Then, an I-shaped groove 69 is formed between the rod-like portions 55 adjacent to each other. At the same time, the backing metal part 67 formed on the rod-like part 55 of one layered molded part is disposed on the back surface side (lower side in the figure) of the rod-shaped part 55 of the other layered molded part. Thereby, the back side of the I-shaped groove 69 is covered with the backing metal portion 67.

  Then, as shown in FIG. 6C, the I-shaped groove 69 between the adjacent rod-like portions 55 is welded. Thus, the rod-like portions 55 are joined together by the welding portion 65. The rod-shaped portions 55 of the joint portion 53 are welded to form a structure 61 firmly bonded to each other.

  As described above, when welding the bar-shaped portions 55 engaged with each other, the backing metal portion 67 disposed on the opposite side to the welding side is shaped in the bar-shaped portion 55 in advance. As a result, there is no need to prepare a separate backing member, and there is no need to fix the backing metal, so the bonding process can be simplified.

  As described above, according to the method of manufacturing a laminate-molded part according to the present embodiment, a laminate-molded part capable of obtaining a strong bonding strength can be easily manufactured by welding the joint portions 53 to each other. Moreover, even if the joint portion 53 has a complicated shape, the joint portion 53 can be easily shaped into an arbitrary shape by lamination molding in which the welding bead layer 43 is laminated. As a result, the number of processing steps can be reduced compared to the case of forming the joint portion by post processing such as cutting, and cost reduction can be achieved.

  And when joining a pair of lamination-molded parts manufactured by said manufacturing method, welding strength is greatly improved by welding along the longitudinal direction the adjacent rod-shaped part 55 of the mutually meshed joint part 53. Can.

  In the above embodiment, the structure 61 is obtained by joining a pair of laminated molded components W1 and W2 each having a joint 53 made of a plurality of rod-like parts 55 to the cylindrical main body 51 shown in FIGS. 2A and 2B. Although the case where it carries out was illustrated, the shapes of layered production parts W1 and W2 and structure 61 are not limited to the above-mentioned embodiment, but may be arbitrary shapes. In addition, the number of layered molded parts to be combined is also arbitrary, and may be a structure in which three or more layered molded parts are joined.

For example, another structure shown in FIG. 7 may be used.
The structural body 61A includes layered shaped parts W3 and W4 shaped by stacking the welding bead layers 43 in the same manner as described above. The layered production parts W 3 and W 4 each include a plate-like main body 71 and a joint 73 having a plurality of rod-like parts 75. The rod-like portions 75 are formed along the edge of the main body 71 at a predetermined interval.

  The layered shaped parts W3 and W4 mesh in the direction in which the joint portions 73 cross each other, form a groove between the rod-like portions 75, and weld the groove. Specifically, the rod-shaped portion 75 of the laminated molded component W4 is inserted between the rod-shaped portions 75 of the laminated molded component W3, and the rod-shaped portion 75 of the laminated molded component W3 is inserted between the rod-shaped portions 75 of the laminated molded component W4. The unit 75 is in the inserted state. Then, the groove formed between the rod-like portions 75 of these layered shaped parts W 3 and W 4 is welded to form a welded portion 77. Thereby, a pair of layered production parts W3 and W4 turns into one integral structure 61A joined in joint part 73 mutually.

  According to the above structure 61A, the parts welded in the joint portion 73 can be manufactured with fewer processing steps than in the case of forming the joint portion by post-processing such as cutting, so that the laminate-molded parts W3, W4 can be manufactured at low cost. , And a structure 61A is obtained.

  Thus, the present invention is not limited to the above-described embodiment, and those skilled in the art can change or apply the components of the embodiment in combination with one another, based on the description of the specification, and based on known techniques. It is also the intention of the present invention to be included in the scope for which protection is sought.

As described above, the following matters are disclosed in the present specification.
(1) forming a main body portion by repeatedly laminating a weld bead layer formed by weld beads obtained by melting and solidifying a filler metal using an arc;
A step of forming a joint on the edge of the main body to form a joint for welding with a joining partner by laminating the welding bead layer;
The manufacturing method of the lamination-molded part which has.
According to the manufacturing method of the layered production part, strong joint strength can be obtained by welding the joint parts. In addition, even if the joint portion has a complicated shape, the joint portion can be easily shaped by lamination molding in which the welding bead layer is laminated. Thereby, compared with the case where a joint part is formed by post-processing such as cutting, the number of processing steps can be reduced, and cost reduction can be achieved.

(2) The method for manufacturing a laminate-molded part according to (1), wherein the joint portion is a plurality of rod-like portions that are shaped by protruding from an edge portion of the main body portion in a joining direction with the joining partner.
According to the manufacturing method of this layered and formed component, by engaging and welding the rod-like portions with each other, it is possible to join with higher bonding strength as compared with the case of simply abutting and welding.

(3) The method for manufacturing a laminate-molded part according to (2), wherein the rod-like portion is shaped by laminating the welding bead layer orthogonal to the joining direction in the joining direction.
According to the method of manufacturing the layered and formed component, it is possible to easily manufacture the layered and formed component having the rod-like portion for joining with high bonding strength.

(4) The method for manufacturing a laminate-molded part according to (2) or (3), wherein a tapered portion which becomes a groove when welding with the joining partner is formed in the rod-shaped portion.
According to the method of manufacturing the layered and formed component, the welding strength between the rod-shaped portions can be enhanced by welding the rod-shaped portion having the groove having the tapered portion.

(5) The method for manufacturing a laminate-molded part according to any one of (2) to (4), wherein a backing metal part disposed on the opposite side to the welding side is formed in the rod-like part.
According to the manufacturing method of the layered production part, since the backing metal part is shaped into the rod-like part, it is not necessary to separately prepare a member to be the backing metal, and it is not necessary to fix the backing metal.

(6) A joining method for joining a pair of the layered molded parts according to any one of (2) to (5) to each other,
A laminated molded component in which the joint formed in one of the layered molded parts and the joint formed in the other are butted, and the adjacent joints are welded along the longitudinal direction of the joint. Bonding method.
According to the method for joining layered shaped parts, by welding the rod-like portions of the joint portions engaged with each other, the shear strength of the welded portion between the rod-like portions becomes the tensile strength in the direction to separate the layered shaped parts The tensile strength is greatly improved as compared to the case of butt welding.

(7) A laminated molded component in which welding bead layers formed from welding beads obtained by melting and solidifying a filler material are laminated and joined together,
Body part,
A joint for welding with a joining partner at an edge of the main body;
A laminated molding component having a.
According to this layered and formed component, the joint portion to be welded to the joining partner is provided in the main body portion by laminating the welding bead layer made of the welding bead. Therefore, it can manufacture with a few processing man-hours compared with the case where a joint part is formed by post-processing, such as cutting, and can provide a laminate-molded part at low cost.

(8) The laminate-molded article according to (7), wherein the joint portion is a plurality of rod-like portions formed by projecting from the edge portion of the main body portion in the joining direction with the joining partner.
According to this layered and formed component, by engaging and welding the rod-like portions with each other, it is possible to join with higher bonding strength as compared with the case of simply abutting and welding.

(9) The laminate-molded article according to (8), wherein the rod-like portion has a tapered portion which becomes a groove when welding with the joining partner.
According to this layered molded part, by welding the groove formed in the rod-shaped portion, the welding strength between the rod-shaped portions can be enhanced, and a higher bonding strength can be obtained.

(10) The layered production part according to (8) or (9), wherein the rod-like portion has a backing metal portion disposed on the opposite side to the welding side.
According to this layered molded part, since it has the backing metal part which is arranged on the opposite side to the welding side, there is no need to separately prepare a member to be the backing metal, and it is also necessary to fix the backing metal. Absent.

(11) A structure in which the joint portions of the pair of layered shaped parts described in any one of (7) to (10) are butted to be welded.
According to this structure, the laminate-molded part welded in the joint portion can be manufactured with a smaller number of processing steps than in the case of forming the joint portion by post-processing such as cutting, so the structure can be obtained at low cost. Be

Reference Signs List 25 welding bead 43 welding bead layer 51, 71 main body portion 53, 73 joint portion 55, 75 bar portion 57 taper portion 61, 61A structure 63 V-shaped groove (groove)
67 Backing metal part M filler material W, W1, W2, W3, W4 laminated molding parts

Claims (11)

Repeatedly laminating the weld bead layer formed by the weld bead obtained by melting and solidifying the filler material using an arc, and forming the body portion;
A step of forming a joint on the edge of the main body to form a joint for welding with a joining partner by laminating the welding bead layer;
The manufacturing method of the lamination-molded part which has.   The method for manufacturing a laminate-molded part according to claim 1, wherein the joint portion is a plurality of rod-like portions that are shaped by protruding from an edge portion of the main body portion in a joining direction with the joining partner.   The method for manufacturing a laminate-molded part according to claim 2, wherein the rod-like portion is shaped by laminating the welding bead layer orthogonal to the joining direction in the joining direction.   The manufacturing method of the layered production article according to claim 2 or 3 which forms a taper part which serves as a groove when welding with said junction partner in said rod-shaped part.   The method for manufacturing a laminate-molded part according to any one of claims 2 to 4, wherein a backing metal part disposed on the opposite side to the welding side is formed on the rod-like part. It is a joining method which joins a pair of above-mentioned lamination fabrication parts indicated in any 1 paragraph of Claims 2-5 mutually,
A laminated molded component in which the joint formed in one of the layered molded parts and the joint formed in the other are butted, and the adjacent joints are welded along the longitudinal direction of the joint. Bonding method. A laminated molded component in which welding bead layers formed of welding beads obtained by melting and solidifying a filler material are laminated and joined together,
Body part,
A joint for welding with a joining partner at an edge of the main body;
A laminated molding component having a.   The layered molded part according to claim 7, wherein the joint portion is a plurality of rod-like portions that are shaped by protruding from an edge portion of the main body portion in a joining direction with the joining partner.   The layered shaped part according to claim 8, wherein the rod-like portion has a tapered portion which becomes a groove when welding with the joining partner.   The layered shaped part according to claim 8 or 9, wherein the rod-like portion has a backing metal portion disposed on the opposite side to the welding side.   A structure in which the joint portions of the pair of layered shaped parts according to any one of claims 7 to 10 are butted to be welded.