JP2017226877A - Manufacturing method of three-dimensional shaped object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder bed melting coupling method capable of obtaining a three-dimensional molded article more suitably conformable to a service condition.SOLUTION: A present invention is a method for producing a three-dimensional molded article by laminating alternately and repeatedly a powder layer and a solidification layer by (i) a step of forming the solidification layer by sintering or melting/solidifying powder of a predetermined place by irradiating a light beam on the predetermined place of the powder layer, and (ii) a step of forming a new powder layer on the obtained solidification layer and by irradiating the light beam on a predetermined place of the new powder layer so as to form a further solidification layer. A different kind of powder different from the powder is supplied to a laminating region for producing the three-dimensional molded article so as to form an alloy part from at least one of the different kind of powder and the solidification layer and the powder layer by the light beam.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for manufacturing a three-dimensional shaped object. In more detail, this invention relates to the manufacturing method of the three-dimensional shaped molded article which forms a solidified layer by light beam irradiation to a powder layer.

A method for producing a three-dimensional shaped object by irradiating a powder material with a light beam (generally referred to as “powder bed fusion bonding method”) has been conventionally known. In this method, a three-dimensional shaped object is manufactured by alternately and repeatedly laminating a powder layer and a solidified layer based on the following steps (i) and (ii).
(I) A step of irradiating a predetermined portion of the powder layer with a light beam and sintering or melting and solidifying the powder at the predetermined portion to form a solidified layer.
(Ii) A step of forming a new powder layer on the obtained solidified layer and similarly irradiating a light beam to form a further solidified layer.

  According to such a manufacturing technique, it becomes possible to manufacture a complicated three-dimensional shaped object in a short time. When an inorganic metal powder is used as the powder material, the obtained three-dimensional shaped object can be used as a mold. On the other hand, when organic resin powder is used as the powder material, the obtained three-dimensional shaped object can be used as various models.

  The case where metal powder is used as the powder material and the three-dimensional shaped object obtained thereby is used as a mold is taken as an example. As shown in FIG. 8, first, the squeezing blade 23 is moved to form a powder layer 22 having a predetermined thickness on the modeling plate 21 (see FIG. 8A). Next, a light beam L is applied to a predetermined portion of the powder layer 22 to form a solidified layer 24 from the powder layer 22 (see FIG. 8B). Subsequently, a new powder layer is formed on the obtained solidified layer and irradiated with a light beam again to form a new solidified layer. When the powder layer formation and the solidified layer formation are alternately performed in this manner, the solidified layer 24 is laminated (see FIG. 8C), and finally, a three-dimensional structure composed of the laminated solidified layer 24 is formed. A shaped object can be obtained. Since the solidified layer 24 formed as the lowermost layer is coupled to the modeling plate 21, the three-dimensional modeled object and the modeling plate 21 form an integrated object, and the integrated object can be used as a mold.

JP 2008-291317 A

  Here, the present inventors have found the following matters. Specifically, when a three-dimensional shaped object used as a mold has, for example, a vent hole inside, an area where the hole exists due to the hole forming a void. The structural strength of can be relatively weak. Therefore, depending on the use conditions of the three-dimensional shaped object, there is a possibility that the generation of cracks may be promoted starting from the hole. That is, there is a possibility that the finally obtained three-dimensional shaped object is not suitably adapted to the use conditions.

  The present invention has been made in view of such circumstances. That is, a main object of the present invention is to provide a powder bed fusion bonding method capable of obtaining a three-dimensional shaped article that is more suitable for use conditions.

In order to achieve the above object, in the present invention,
(I) irradiating a predetermined portion of the powder layer with a light beam to sinter or melt and solidify the powder at the predetermined portion to form a solidified layer; and (ii) a new powder layer on the obtained solidified layer. Forming a three-dimensional shaped object by alternately and repeatedly laminating a powder layer and a solidified layer in a step of forming a further solidified layer by irradiating a predetermined portion of a new powder layer with a light beam Because
A three-dimensional shape in which a different type of powder different from the powder is supplied to a lamination region for manufacturing a three-dimensional shaped object, and an alloy part is formed from the different type powder and at least one of a solidified layer and a powder layer by a light beam. A method for manufacturing a shaped article is provided.

  In the manufacturing method of the present invention, it is possible to obtain a three-dimensional shaped object that is suitably adapted to the use conditions.

Sectional view schematically showing the technical idea of the present invention Sectional drawing which showed the aspect for manufacturing the three-dimensional shape molded article which has an alloy part typically (FIG. 2 (a): At the time of arrangement | positioning of a solidified layer, FIG.2 (b): To the surface of a solidified layer 2 (c) at the time of formation of the alloy part, FIG. 2 (d): at the time of formation of the powder layer, FIG. 2 (e): manufacture of a three-dimensional shaped object having the alloy part When completed) Sectional drawing (FIG. 3 (a): At the time of formation of a solidified layer, FIG.3 (b): The surface of a solidified layer) which showed the other aspect for manufacturing the three-dimensional shaped molded object which has an alloy part. Fig. 3 (c): At the time of forming the powder layer, Fig. 3 (d): At the completion of the production of the three-dimensional shaped article having the alloy part) Sectional drawing (FIG. 4 (a): At the time of formation of a powder layer, FIG.4 (b): The surface of a powder layer) which showed the other aspect for manufacturing the three-dimensional shaped molded object which has an alloy part 4 (c): at the time of forming the alloy part and at the time of forming the solidified layer, FIG. 4 (d): at the time of the completion of the production of the three-dimensional shaped object having the alloy part) Sectional view schematically showing an embodiment for forming a modeling plate having an alloy part (FIG. 5A: when dissimilar powder is placed on the surface of the modeling plate, FIG. 5B: alloy part When forming) Sectional view schematically showing the supply mode of different types of powder Sectional view schematically showing another supply mode of different types of powder Cross-sectional views schematically showing a process aspect of stereolithography combined processing in which the powder bed fusion bonding method is performed (FIG. 8A: at the time of forming the powder layer, FIG. 8B: at the time of forming the solidified layer, FIG. c): During lamination The perspective view which showed the composition of the optical modeling compound processing machine typically Flow chart showing general operation of stereolithography combined processing machine

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The forms and dimensions of the various elements in the drawings are merely examples, and do not reflect actual forms and dimensions.

  In the present specification, the “powder layer” means, for example, a “metal powder layer made of metal powder”. The “predetermined portion of the powder layer” substantially refers to the region of the three-dimensional shaped object to be manufactured. Therefore, by irradiating the powder existing at the predetermined location with a light beam, the powder is sintered or melted and solidified to form a three-dimensional shaped object.

  Further, the “up and down” direction described directly or indirectly in the present specification is based on, for example, the positional relationship between the modeling plate and the three-dimensional shaped object. Specifically, the side on which the three-dimensional shaped object is manufactured with reference to the modeling plate is defined as “upward”, and the opposite side is defined as “downward”.

[Powder bed fusion bonding method]
First, the powder bed fusion bonding method which is the premise of the production method of the present invention will be described. In particular, an optical modeling combined processing that additionally performs a cutting process of a three-dimensional shaped object in the powder bed fusion bonding method will be given as an example. FIG. 8 schematically shows a process mode of stereolithography combined processing, and FIGS. 9 and 10 are flowcharts of the main configuration and operation of the stereolithography combined processing machine capable of performing the powder bed fusion bonding method and the cutting process. Respectively.

  As shown in FIG. 9, the stereolithography combined processing machine 1 includes a powder layer forming unit 2, a light beam irradiation unit 3, and a cutting unit 4.

  The powder layer forming means 2 is means for forming a powder layer by spreading metal powder with a predetermined thickness. The light beam irradiation means 3 is a means for irradiating a predetermined portion of the powder layer with the light beam L. The cutting means 4 is means for cutting the surface of the laminated solidified layer, that is, the surface of the three-dimensional shaped object.

  As shown in FIG. 8, the powder layer forming unit 2 mainly includes a powder table 25, a squeezing blade 23, a modeling table 20, and a modeling plate 21. The powder table 25 is a table that can be moved up and down in a powder material tank 28 whose outer periphery is surrounded by a wall 26. The squeezing blade 23 is a blade that can move in the horizontal direction to obtain the powder layer 22 by supplying the powder 19 on the powder table 25 onto the modeling table 20. The modeling table 20 is a table that can be moved up and down in a modeling tank 29 whose outer periphery is surrounded by a wall 27. The modeling plate 21 is a plate that is arranged on the modeling table 20 and serves as a base for a three-dimensional modeled object.

  As shown in FIG. 9, the light beam irradiation means 3 mainly includes a light beam oscillator 30 and a galvanometer mirror 31. The light beam oscillator 30 is a device that emits a light beam L. The galvanometer mirror 31 is means for scanning the emitted light beam L into the powder layer 22, that is, scanning means for the light beam L.

  As shown in FIG. 9, the cutting means 4 mainly includes an end mill 40 and a drive mechanism 41. The end mill 40 is a cutting tool for cutting the surface of the laminated solidified layer, that is, the surface of the three-dimensional shaped object. The drive mechanism 41 is means for moving the end mill 40 to a desired location to be cut.

  The operation of the optical modeling complex machine 1 will be described in detail. As shown in the flowchart of FIG. 10, the operation of the optical modeling complex machine 1 includes a powder layer forming step (S1), a solidified layer forming step (S2), and a cutting step (S3). The powder layer forming step (S1) is a step for forming the powder layer 22. In the powder layer forming step (S1), first, the modeling table 20 is lowered by Δt (S11) so that the level difference between the upper surface of the modeling plate 21 and the upper end surface of the modeling tank 29 becomes Δt. Next, after raising the powder table 25 by Δt, the squeezing blade 23 is moved in the horizontal direction from the powder material tank 28 toward the modeling tank 29 as shown in FIG. Thereby, the powder 19 arranged on the powder table 25 can be transferred onto the modeling plate 21 (S12), and the powder layer 22 is formed (S13). Examples of the powder material for forming the powder layer 22 include “metal powder having an average particle diameter of about 5 μm to 100 μm”. When the powder layer 22 is formed, the process proceeds to a solidified layer forming step (S2). The solidified layer forming step (S2) is a step of forming the solidified layer 24 by light beam irradiation. In the solidified layer forming step (S2), the light beam L is emitted from the light beam oscillator 30 (S21), and the light beam L is scanned to a predetermined location on the powder layer 22 by the galvano mirror 31 (S22). As a result, the powder at a predetermined location of the powder layer 22 is sintered or melted and solidified to form the solidified layer 24 as shown in FIG. 8B (S23). As the light beam L, a carbon dioxide laser, an Nd: YAG laser, a fiber laser, an ultraviolet ray, or the like may be used.

  The powder layer forming step (S1) and the solidified layer forming step (S2) are alternately repeated. As a result, a plurality of solidified layers 24 are laminated as shown in FIG.

  When the laminated solidified layer 24 reaches a predetermined thickness (S24), the process proceeds to the cutting step (S3). The cutting step (S3) is a step for cutting the surface of the laminated solidified layer 24, that is, the surface of the three-dimensional shaped object. A cutting step is started by driving the end mill 40 (see FIG. 8C and FIG. 9) (S31). For example, when the end mill 40 has an effective blade length of 3 mm, a cutting process of 3 mm can be performed along the height direction of the three-dimensional shaped object. When the solidified layer 24 is laminated, the end mill 40 is driven. Specifically, the surface of the laminated solidified layer 24 is subjected to a cutting process while moving the end mill 40 by the drive mechanism 41 (S32). At the end of such a cutting step (S3), it is determined whether or not a desired three-dimensional shaped object has been obtained (S33). When the desired three-dimensional shaped object is not yet obtained, the process returns to the powder layer forming step (S1). Thereafter, by repeatedly performing the powder layer forming step (S1) to the cutting step (S3) to further laminate the solidified layer and perform the cutting process, a desired three-dimensional shaped object is finally obtained.

[Production method of the present invention]
The present invention has a feature in the formation mode of the solidified layer among the above-described powder bed fusion bonding methods.

  Specifically, in the present invention, as shown in FIG. 1, the dissimilar powder 19 ′ and the solidified layer are supplied by the light beam L by supplying the dissimilar powder 19 ′ to the laminated region 5 for manufacturing the three-dimensional shaped object 100. The alloy part 50 is formed from at least one of 24 and the powder layer 22.

  The “lamination region 5” here substantially refers to a region where the powder layer 22 and the solidified layer 24 are alternately and repeatedly laminated. As used herein, the “different powder 19 ′” refers to a different type of powder from the powder 19 used as a main material for producing the three-dimensional shaped object 100. The “powder 19 used as a main material for manufacturing the three-dimensional shaped object 100” herein may be, for example, an Fe-based powder. On the other hand, the “foreign powder 19 ′” herein may be made of at least one material selected from the group consisting of Ti, C, Co, Cr, Cu, Nb, Ni, W, and Zn. In addition, the “alloy portion 50” here refers to a component composed of two or more metal elements or a component composed of a metal element and a non-metal element in a broad sense. The “alloy part 50” here is, in a narrow sense, two or more kinds of metal components melted and newly alloyed, or a metal component and a nonmetal component are melted and newly alloyed. Refers to things. The “alloy portion 50” herein may include those in which two or more kinds of metal components are kept independent at the crystal level, or those in which a metal component and a non-metal component are kept independent.

  In the present invention, in the laminated region 5 for manufacturing the three-dimensional shaped object 100 as described above, the alloy part is formed from the different powder 19 ′ and at least one of the solidified layer 24 and the powder layer 22 using the light beam L. 50 is formed. That is, in the present invention, the three-dimensional shaped article 100 having the alloy part 50 locally is manufactured. Since the alloy part 50 can be newly alloyed from the main powder material and the dissimilar powder material for producing the three-dimensional shaped object 100, compared with the solidified layer formed from the main powder material, Different characteristics may be provided. Therefore, depending on the use conditions of the finally obtained three-dimensional structure 100, only a predetermined region of the three-dimensional structure 100 can be provided with different characteristics compared to other regions. Different characteristics can be provided due to the characteristics of the material used for the dissimilar powder 19 ′ when, for example, an Fe-based powder or the like is used as the powder 19. For example, when the above-described materials such as C and W are used as the material of the different kind of powder 19 ′, it is possible to provide the alloy part 50 with a property of improving hardness. For example, when the above-described materials such as Ni and Cr are used as the material of the dissimilar powder 19 ′, it is possible to provide the alloy part 50 with a characteristic of improving corrosion resistance. For example, when the above-described materials such as Ni, Zn, and Nb are used as the material of the dissimilar powder 19 ′, it is possible to provide the alloy part 50 with the property of improving toughness. For example, when the material such as Cu described above is used as the material of the different kind of powder 19 ′, it is possible to provide the alloy part 50 with a characteristic of improving thermal conductivity. For example, when the material such as Ni described above is used as the material of the different kind of powder 19 ′, the alloy portion 50 can be provided with a characteristic of reducing the linear expansion coefficient. Also from the above thing, in this invention, according to the use conditions of the finally obtained three-dimensional structure 100, only a predetermined region of the three-dimensional structure 100 is provided with different characteristics compared to other regions. Therefore, it is possible to obtain the three-dimensional shaped article 100 that is suitably adapted to the use conditions. In the present invention, it is confirmed that the alloy powder prealloyed is not used as a material for forming the powder layer. In short, the present invention confirms that “alloying” is not carried out before the production of the three-dimensional shaped object, and is carried out during the production of the three-dimensional shaped object. Keep it.

  In the present invention, the alloy part may be formed according to the following embodiment.

  In one aspect, in the laminated region, the dissimilar powder 19 ′ is provided on the surface 24a of the solidified layer 24, and the alloy part is formed from the dissimilar powder 19 ′ provided on the surface 24a and the solidified layer 24 positioned immediately below the dissimilar powder 19 ′. 50 may be formed (see FIG. 2).

  Specifically, as shown in FIG. 2A and FIG. 2B, the dissimilar powder 19 ′ is provided on the surface 24 a of the solidified layer 24 already formed, for example, the upper surface of the solidified layer 24. After the dissimilar powder 19 ′ is provided, the dissimilar powder 19 ′ is irradiated with the light beam L as shown in FIGS. 2 (b) and 2 (c). At this time, the light beam L is applied to the different powder 19 ′ so that the predetermined region 24b of the solidified layer 24 located immediately below the different powder 19 ′ can be melted by the irradiation heat energy of the light beam L. Irradiate. When the dissimilar powder 19 ′ and the predetermined region 24b of the solidified layer 24 are melted together, the components of the dissimilar powder 19 ′ and the metal component (for example, iron-based component) contained in the predetermined region 24b are caused due to the molten state. Can be mixed. When the mixed portion is cooled, an alloy portion 50 alloyed from the components of the different powder 19 ′ and the metal components (for example, iron-based components) included in the predetermined region 24 b can be formed.

  After forming the alloy portion 50, a new powder layer 22 is formed as shown in FIG. Although not particularly limited, for example, a new powder layer 22 is formed so as to be positioned on the solidified layer 24. After forming a new powder layer 22, the new powder layer 22 is irradiated with a light beam L to form a new solidified layer 24 'as shown in FIG. As described above, the three-dimensional shaped object 100 having the alloy part 50 can be finally manufactured.

  Note that the present invention is not limited to the above-described embodiment. For example, in the stacked region, the dissimilar powder 19 ′ is provided on the surface 24a of the solidified layer 24, and the dissimilar powder 19 ′ provided on the surface 24a is positioned immediately above the dissimilar powder 19 ′. The alloy part 50 may be formed from the powder layer 22 and the solidified layer 24 located immediately below the different powder 19 ′ (see FIG. 3).

  Specifically, as shown in FIG. 3A and FIG. 3B, the dissimilar powder 19 ′ is provided on the surface 24 a of the solidified layer 24 already formed, for example, the upper surface of the solidified layer 24. After the dissimilar powder 19 'is provided, in this embodiment, a new powder layer 22 is formed on the solidified layer 24 provided with the dissimilar powder 19' as shown in FIG. After forming the new powder layer 22, the new powder layer 22 is irradiated with the light beam L as shown in FIGS. 3C and 3D to form a new solidified layer 24 '. At this time, in addition to the new powder layer 22, the different powder 19 ′ located immediately below the predetermined region 22 b of the new powder layer 22 and the lower powder 19 ′ are located by the irradiation heat energy of the light beam L. The new powder layer 22 is irradiated with the light beam L so that the predetermined region 24b of the solidified layer 24 can be melted.

  More specifically, when forming a new solidified layer 24 ′ from the new powder layer 22, the new powder layer 22 is not irradiated with the light beam L with the same irradiation energy as a whole, but different from below. The irradiation energy of the light beam L may be appropriately changed between a predetermined region of the powder layer 22 where the powder 19 ′ is present and a predetermined region of the powder layer 22 where the dissimilar powder 19 ′ is not present below. At this time, from the viewpoint of melting the lower foreign powder 19 ′ and the predetermined region 24b of the solidified layer 24 located immediately below the different powder 19 ′, the predetermined region of the powder layer 22 where the different powder 19 ′ exists below is You may irradiate with the light beam L which has irradiation energy larger than the predetermined area | region of the powder layer 22 in which the dissimilar powder 19 'does not exist below. When the different powder 19 ′, the predetermined region 22 b of the new powder layer 22, and the predetermined region 24 b of the solidified layer 24 are melted together, the components of the different powder 19 ′ are included in the predetermined region 22 b due to the molten state. A metal component (for example, an iron-based component) and a metal component (for example, an iron-based component) included in the predetermined region 24b can be mixed. When the mixed portion is cooled, it is alloyed from the components of the different powder 19 ′, the metal component (for example, iron-based component) included in the predetermined region 22b, and the metal component (for example, iron-based component) included in the predetermined region 24b. The alloy part 50 can be formed. As described above, the three-dimensional shaped object 100 having the alloy part 50 can be finally manufactured.

  In one aspect, the dissimilar powder 19 ′ is provided on the surface 22 a of the powder layer 22 in the laminated region, and the alloy part is formed from the dissimilar powder 19 ′ provided on the surface 22 a and the powder layer 22 positioned immediately below the dissimilar powder 19 ′. 50 may be formed (see FIG. 4).

  Specifically, as shown in FIG. 4A and FIG. 4B, the dissimilar powder 19 ′ is provided on the surface 22 a of the powder layer 22, for example, the upper surface of the powder layer 22. After the dissimilar powder 19 'is provided, the light beam L is irradiated to the powder layer 22 having the dissimilar powder 19' on the surface as shown in FIGS. 4 (b) and 4 (c). At this time, the powder layer 22 is irradiated with the light beam L such that the different heat powder 19 ′ and the predetermined region 22 c of the powder layer 22 positioned immediately below the different powder 19 ′ can be melted by the irradiation heat energy of the light beam L. . Here, the “predetermined region 22c of the powder layer 22” is a region located immediately below the dissimilar powder 19 ′ as shown in FIG. 4 (b), for example, and includes the solidified layer 24 and the dissimilar powder 19 ′. Substantially all areas in between. When the dissimilar powder 19 ′ and the predetermined region 22c of the powder layer 22 positioned immediately below the dissimilar powder 19 ′ are melted together, the dissimilar powder 19 ′ is included in the predetermined region 22c due to the molten state. A metal component (for example, an iron-based component) can be mixed. When the mixed portion is cooled, as shown in FIG. 4 (d), an alloy part 50 is formed which is alloyed from the component of the different powder 19 'and the metal component (for example, iron-based component) contained in the predetermined region 22c. You can get. As described above, the three-dimensional shaped object 100 having the alloy part 50 can be finally manufactured. In the present embodiment, as described above, the different powder 19 ′ and the predetermined region 22c of the powder layer 22 located immediately below the different powder 19 ′ are melted by the light beam L in order to form the alloy part 50. obtain. In this regard, since the powder layer 22, specifically, the predetermined region 22c of the powder layer 22, is in a state before being melted and solidified, the range to be melted when irradiated with the light beam L is the solidified layer that is in a state after being melted and solidified. Can be relatively large. Therefore, due to the fact that the melting range can be relatively large, the alloy portion 50 is compared with the embodiment (see FIGS. 2 and 3) in which the above-described different powder 19 ′ is provided on the surface 24a of the solidified layer 24. The formed range can be large.

  In one embodiment, as shown in FIG. 5, the powder layer and the solidified layer are stacked on the modeling plate 21, and prior to the stacking, the dissimilar powder 19 ′ is supplied to the modeling plate 21, and the light beam L The alloy part 50 a may be formed on the surface 21 a of the modeling plate 21.

  Specifically, as shown in FIG. 5A, the different type powder 19 ′ is provided in the laminated region 5 in the surface 21 a of the modeling plate 21. After the dissimilar powder 19 ′ is provided, the dissimilar powder 19 ′ is irradiated with the light beam L. At this time, the light beam L is applied to the dissimilar powder 19 ′ so that the predetermined region 21b of the modeling plate 21 positioned immediately below the dissimilar powder 19 ′ can be melted by the irradiation heat energy of the light beam L. Irradiate. When the dissimilar powder 19 ′ and the predetermined region 21b of the modeling plate 21 are melted together, the components of the dissimilar powder 19 ′ and the metal component (for example, iron-based material) included in the predetermined region 21b of the modeling plate 21 due to the molten state. Ingredients) can be mixed. When the mixed portion cools as shown in FIG. 5B, the alloy portion 50a newly alloyed from the component of the different powder 19 ′ and the metal component (for example, iron-based component) contained in the predetermined region 21b. Can be formed. When the alloy part 50a can be formed, the alloy part 50a can be composed of a component of the different powder 19 'and a metal component (for example, an iron-based component) contained in the predetermined region 21b. Compared with the case where it consists only of a system metal component, a different characteristic can be provided. Although not particularly limited, for example, when the above-described materials such as Ni, Zn, and Nb are used as the material of the dissimilar powder 19 ′, it is possible to provide the alloy portion 50 a with a property of improving toughness. Residual stress occurs in the interface region between the modeling plate 21 and the solidified layer, that is, the three-dimensional modeled object, and cracks may occur in the three-dimensional modeled object due to “warp deformation” that may occur due to the residual stress. . In this regard, when the alloy part 50a having the characteristic of improving toughness is formed, the occurrence of the crack can be suitably suppressed.

  However, the present invention is not limited to this, and for example, the material of the different powder 19 ′ may be made of the above-described material such as Ni, and the alloy portion 50 a may be provided with a characteristic of reducing the linear expansion coefficient. For example, the above-described materials such as Ni and Cr may be used as the material of the dissimilar powder 19 'to provide the alloy part 50a with the characteristics of improving corrosion resistance. Further, for example, the above-described material such as Cu may be used as the material of the different powder 19 ′ to provide the alloy part 50 a with the property of improving thermal conductivity. Also from the above thing, since it can provide a different characteristic compared with another area | region in the predetermined area | region (for example, lamination | stacking area | region 5) of the shaping | molding plate 21, a solidified layer in the lamination | stacking area | region 5 of the shaping | molding plate 21 resulting from it. That is, a three-dimensional shaped object can be suitably formed.

  In addition, about the different kind powder used for the above-mentioned alloy part formation, you may supply with the following method.

  In one embodiment, as shown in FIG. 6, the dissimilar powder 19 ′ may be sprayed on the surface of at least one of the solidified layer 24 and the powder layer 22.

  Although not particularly limited, examples of the means for spraying the foreign powder 19 ′ include an ink jet. For example, when the different type powder 19 ′ is sprayed using an ink jet or the like, the different type powder 19 ′ can be suitably supplied to a local region on at least one surface of the solidified layer 24 and the powder layer 22. Thereby, the use condition of the finally obtained three-dimensional structure 100 can be taken into account, and the alloy part 50 can be suitably formed in the local region of the three-dimensional structure 100. Therefore, since the characteristics of the local region of the three-dimensional shaped object 100 can be suitably changed as compared with other areas, it can be possible to obtain the three-dimensional shaped object 100 that is suitably adapted to the use conditions.

  In one embodiment, as shown in FIG. 7, the different powder 19 ′ is dispersed from the member 90 made of the different powder 19 ′ arranged at a predetermined position, and the different powder is applied to at least one surface of the solidified layer 24 and the powder layer 22. 19 'may be provided.

  Specifically, as shown in FIG. 7, the light beam L entering through the light transmission window 70 provided in the chamber 60 is irradiated to the member 90 made of the different powder 19 ′ disposed at a predetermined position, thereby The dissimilar powder 19 ′ may be dispersed from the member 90. More specifically, as shown in the lower view (partially enlarged view) of FIG. 7, the movable covering member 60 a provided in the chamber 60 is slid onto the solidified layer 24 or the powder layer 22. The movable covering member 60a is slidable in the left-right direction, and has a member made of different kinds of powder 19 'inside. After the movable covering member 60a is slid onto the solidified layer 24 or the powder layer 22, the light beam L is caused to enter through the light transmission window 70a provided in the movable covering member 60a. Then, the incident light beam L is irradiated to a predetermined portion, for example, the member 90 made of the different powder 19 ′ disposed on the side of the movable covering member 60a, thereby dispersing the different powder 19 ′ from the member 90. Good. The direction of the light beam L may be changed as appropriate by the mirror 80 shown in FIG. Specifically, by changing the installation direction of the mirror 80 as appropriate, the direction of the light beam L can be changed so that, for example, the members made of the powder layer 22 and the dissimilar powder 19 ′ are irradiated with the light beam L, respectively. Good.

  As mentioned above, although one Embodiment of this invention was described, it has only illustrated the typical example of the application scope of this invention. Therefore, those skilled in the art will readily understand that the present invention is not limited thereto and various modifications can be made.

L Light beam 5 Laminated area 19 Powder 19 'Different powder 21 Molding plate
21a Surface of modeling plate 22 Powder layer 24 Solidified layer 24a Surface of solidified layer 50 Alloy part 50a Alloy part 100 Three-dimensional shaped object

Claims (6)

(I) a step of irradiating a predetermined portion of the powder layer with a light beam to sinter or melt solidify the powder at the predetermined portion to form a solidified layer; and (ii) a new powder on the obtained solidified layer A three-dimensional shaped object is produced by forming a layer and repeatedly laminating a powder layer and a solidified layer by a process of forming a further solidified layer by irradiating a predetermined portion of the new powder layer with a light beam. A way to
A different kind of powder different from the powder is supplied to a lamination region for manufacturing the three-dimensional shaped object, and an alloy part is formed from the different powder and at least one of the solidified layer and the powder layer by the light beam. A manufacturing method of a three-dimensional shaped object to be formed.   2. The alloy part is formed from the dissimilar powder provided on the surface of the solidified layer in the laminated region, and the dissimilar powder provided on the surface and the solidified layer located immediately below the dissimilar powder. The manufacturing method of the three-dimensional shape molded article of description.   2. The alloy part is formed from the dissimilar powder provided on the surface of the layered region and the dissimilar powder provided on the surface and the powder layer located immediately below the dissimilar powder in the laminated region. Or the manufacturing method of the three-dimensional shape molded article of 2.   The method for producing a three-dimensional shaped object according to any one of claims 1 to 3, wherein the dissimilar powder is provided by spraying the solidified layer and the at least one surface of the powder layer. Laminating the powder layer and the solidified layer on a modeling plate,
Prior to the lamination, the three-dimensional shape modeling according to any one of claims 1 to 4, wherein the dissimilar powder is supplied to the modeling plate, and the alloy part is formed on the surface of the modeling plate by the light beam. Manufacturing method.   The powder is made of an iron-based metal, and the dissimilar powder is made of at least one material selected from the group consisting of Ti, C, Co, Cr, Cu, Nb, Ni, W, and Zn. 5. A method for producing a three-dimensional shaped object according to any one of 5 above.