JP7312063B2 - Three-dimensional object manufacturing method and three-dimensional modeling apparatus - Google Patents

Description

TECHNICAL FIELD Embodiments of the present invention relate to a three-dimensional object manufacturing method and a three-dimensional modeling apparatus.

Recently, attention has been paid to a three-dimensional molding technique called AM process (Additive Manufacturing). The AM process is a method of manufacturing a desired three-dimensional object by sequentially laminating layers made of materials such as metal powder and resin. In the AM process, a three-dimensional object with a complicated shape can be directly manufactured, in other words, it can be manufactured without requiring a process such as assembly. Therefore, researches are being advanced in various fields.

For example, in steam turbines, studies are underway to manufacture moving blades, rotors, and the like by the AM process. If it becomes possible to efficiently manufacture parts with complicated shapes such as rotor blades by the AM process, it may be possible to achieve high quality and significant cost reduction.

In AM processes using metal powder, a method called a powder bed type is often adopted. In this type of AM process, metal powder is spread on a base plate placed in a chamber, and then the metal powder is irradiated with, for example, an electron beam in a predetermined pattern. Form layers of shape. After that, the metal powder is laid again on the base plate so as to cover the layer of melted metal powder, and then the electron beam is irradiated again in a predetermined pattern to form another desired shape layer of melted metal powder. to form

By repeating the supply of the metal powder and the irradiation of the electron beam as described above, a three-dimensional object in which a plurality of layers are laminated is manufactured. In this process, each layer and the surrounding metal powder are typically held at elevated temperatures until all the layers that make up the three-dimensional object have been formed. Such a holding operation in a high temperature state is generally called "preheating".

In the powder bed type AM process described above, a laser beam may be used as an energy source for melting the metal powder.

JP 2015-507092 A

In the AM process using metal powder, when a layer forming a three-dimensional object is formed from a position right above the base plate, the separation of the base plate and the three-dimensional object becomes difficult, and the three-dimensional object may be undesirably damaged. It can happen. Therefore, the layers that make up the three-dimensional object are usually formed from a remote position with respect to the base plate.

Moreover, if only the metal powder is interposed between the three-dimensional object and the base plate, the posture of the three-dimensional object may become unstable. Therefore, a support may be provided between the three-dimensional object and the base plate to support the three-dimensional object. Such supports are made of metal powder melted by electron beams or laser beams, and are formed in a plurality of shapes such as plates or columns.

The support remains connected to both the three-dimensional object and the baseplate to support the weight of the three-dimensional object to maintain the position of the three-dimensional object relative to the baseplate. However, when the support is connected to both the three-dimensional object and the base plate in this way, the difference in coefficient of linear expansion between the three-dimensional object and the base plate causes undesirable deformation of the three-dimensional object, which reduces modeling accuracy. It may happen.

Specifically, the three-dimensional object is cooled after all of its constituent layers have been formed. At this time, if the linear expansion coefficient of the base plate is larger than the linear expansion coefficient of the three-dimensional object, the base plate contracts more than the three-dimensional object during cooling. stress is transmitted to the three-dimensional object, and deformation may occur in the three-dimensional object. Such deformation of the three-dimensional object requires post-processing such as correction processing, which may prolong the construction period and increase costs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for manufacturing a three-dimensional object and a three-dimensional modeling apparatus capable of improving the modeling accuracy of a three-dimensional object.

A method for manufacturing a three-dimensional object according to an embodiment includes:
By repeating the supply of the raw material powder onto the base plate and the formation of the molten support layer made of the raw material powder melted by irradiating the raw material powder with an energy beam, a plurality of the molten support layers are laminated, a support forming step of forming a plurality of vertical supports extending upwardly from the base plate and at least one horizontal support extending from one of the adjacent vertical supports toward the other;
Supplying the raw material powder onto the base plate so as to cover the vertical support and the horizontal support, and melting the raw material powder on the vertical support and the horizontal support by irradiating an energy beam. a forming step of forming a three-dimensional object on the vertical support and the lateral support by repeating the formation of the molten layer for modeling made of the raw material powder and laminating a plurality of the molten layer for modeling; be prepared.
The support forming step and the shaping step are performed in an environment maintained at a high temperature.

Further, the three-dimensional modeling apparatus according to the embodiment includes a chamber, a base plate arranged in the chamber, a dispenser that supplies raw material powder onto the base plate, and an irradiation device that irradiates the raw material powder with an energy beam. A head and a controller for controlling the operation of the dispenser and the irradiation head.
The controller controls the dispenser and the irradiation head, and repeats the supply of the raw material powder onto the base plate and the formation of a support melting layer made of the raw material powder melted by irradiating the raw material powder with an energy beam. By stacking a plurality of dissolution layers for support, a plurality of vertical supports extending upwardly from the base plate and at least one horizontal support extending from one of the adjacent vertical supports toward the other. to form
Further, the controller controls the dispenser and the irradiation head to supply the raw material powder onto the base plate so as to cover the vertical support and the lateral support, and By repeating formation of a molten layer for modeling made of the raw material powder melted by irradiating the raw material powder on the horizontal support with an energy beam, and stacking a plurality of the molten layers for modeling, the vertical support and A three-dimensional object is formed on the lateral support.

ADVANTAGE OF THE INVENTION According to this invention, the modeling precision of a three-dimensional object can be improved.

1 is a schematic configuration diagram of a three-dimensional modeling apparatus according to one embodiment; FIG. FIG. 4 is a diagram for explaining a method of manufacturing a three-dimensional object by a three-dimensional modeling apparatus according to one embodiment, and is a diagram showing the flow of forming supports for the three-dimensional object. FIG. 4 is a diagram for explaining a method of manufacturing a three-dimensional object by a three-dimensional modeling apparatus according to one embodiment, and showing a flow of forming a three-dimensional object; FIG. It is a figure explaining the modification of one embodiment. It is a figure explaining other modifications of one embodiment.

An embodiment will be described in detail below with reference to the accompanying drawings.

(three-dimensional modeling device)
First, a three-dimensional modeling apparatus 1 according to one embodiment will be described. FIG. 1 is a schematic configuration diagram of a three-dimensional modeling apparatus 1. As shown in FIG. The three-dimensional modeling apparatus 1 is a 3D printer that uses the AM process, and can manufacture various three-dimensional objects. The three-dimensional modeling apparatus 1 may be used, for example, to manufacture turbine blades, more specifically rotor blades for steam turbines.

A three-dimensional modeling apparatus 1 includes a chamber 2 whose internal atmosphere can be adjusted to, for example, an inert gas or vacuum atmosphere, a base plate 3 arranged in the chamber 2, and a dispenser 4 that supplies raw material powder onto the base plate 3. , an irradiation head 5 for irradiating the raw material powder supplied by the dispenser 4 with an energy beam, and a controller 6 for controlling the operations of the dispenser 4 and the irradiation head 5 .

The base plate 3 is arranged in a layered manufacturing chamber 32 formed in the chamber 2 , and can be raised and lowered in the layered manufacturing chamber 32 by driving the plate driving section 31 . The base plate 3 is made of metal, and is made of stainless steel in this embodiment, and may be made of SUS316, for example.

A three-dimensional object manufactured by the three-dimensional modeling apparatus 1 is formed by laminating a plurality of layers on the base plate 3 . Although the details will be described later, the base plate 3 is lowered by a predetermined distance driven by the plate driving unit 31 each time one layer forming a three-dimensional object is formed on the upper surface of the base plate 3 . After that, one of the next layers constituting the three-dimensional object is formed on the upper surface of the base plate 3 . By repeating such operations, a three-dimensional object is gradually formed in the layered manufacturing chamber 32 .

Note that the direction in which the base plate 3 moves up and down, in other words, the direction in which the layers forming the three-dimensional object to be manufactured are stacked is sometimes referred to as the stacking direction below. The stacking direction may be aligned with the vertical direction, or may be inclined with respect to the vertical direction.

The dispenser 4 is connected to a powder tank 41 that stores raw material powder, and supplies the raw material powder stored in the powder tank 41 onto the base plate 3 . The dispenser 4 is arranged above the base plate 3 and is movable across the base plate 3 above the base plate 3 . The dispenser 4 is controlled by the controller 6 to form a leveled layer of raw powder of a predetermined thickness on the base plate 3 .

Note that the description “on the base plate 3” does not mean that it is limited to the case where the raw material powder is directly supplied onto the base plate 3 or the layer is formed directly on the base plate 3. It is used as a concept including the case where powder is newly supplied onto the layer when another layer is formed, or the case where a new layer is formed.

Further, in the present embodiment, the dispenser 4 supplies powder having an alloy composition as the raw material powder, but the type and composition are not particularly limited.

The irradiation head 5 is arranged above the base plate 3 and is movable across the base plate 3 above the base plate 3 . The irradiation head 5 is configured to irradiate an electron beam as an energy beam, and irradiates the raw material powder supplied onto the base plate 3 by the dispenser 4 with the electron beam. The raw material powder melted by such electron beam irradiation forms a melted layer, and this melted layer becomes a layer constituting a three-dimensional object. In this embodiment, the irradiation head 5 irradiates the electron beam, but instead of this, a laser beam may be radiated.

The controller 6 controls the dispenser 4 and the irradiation head 5 so that the supply of the raw material powder onto the base plate 3 by the dispenser 4 and the irradiation of the raw material powder by the irradiation head 5 with the electron beam are repeatedly performed. When the controller 6 controls the irradiation of the electron beam from the irradiation head 5, the controller 6 moves the irradiation head 5 and irradiates the electron beam so as to form a layer having a desired shape constituting the three-dimensional object. Toggles illumination on and off. Further, the controller 6 controls the plate driving section 31 so that the base plate 3 descends after the raw material powder is supplied and the electron beam is irradiated.

As described above, the supply of the raw material powder by the dispenser 4 and the irradiation of the electron beam by the irradiation head 5 are repeated until the formation of the layers constituting the three-dimensional object to be manufactured is finally completed. In the form of (1), each layer composed of the raw material powder melted by electron beam irradiation and the surrounding metal powder are preheated and held at a high temperature. After that, the preheating is canceled and the three-dimensional object is cooled to complete the production of the three-dimensional object. When the preheating is canceled, the temperature inside the chamber 2 drops, and the temperature of the base plate 3 and the like also drops.

Further, the three-dimensional modeling apparatus 1 according to the present embodiment, which will be described later in detail, is to be manufactured after the vertical support 100 and the horizontal support 110 (see FIG. 2(h)) are formed on the base plate 3. It is designed to start modeling a three-dimensional object. The vertical support 100 and the horizontal support 110 are formed by laminating melted layers obtained by melting raw material powder with an electron beam, and the manufacturing procedure is the same as that for the three-dimensional object to be manufactured. Therefore, the controller in this embodiment first controls the dispenser 4 and the irradiation head 5 to form the vertical support 100 and the lateral support 110, and then controls the dispenser 4 and the irradiation head 5 to form the three-dimensional object. to control.

A plurality of vertical supports 100 are provided between the base plate 3 and the three-dimensional object, and each extend to rise from the base plate 3 . The lateral support 110 is formed to extend from one of the adjacent vertical supports 100, 100 toward the other. It should be noted that the vertical support 100 and lateral support 110 shown in FIG. Dimensions and shapes are different from those shown. For example, the practical thickness of the vertical support 100 is very thin.

The vertical support 100 is provided to support the load of the three-dimensional object, and the lateral support 110 is provided to support the load that is transmitted to the three-dimensional object due to contraction of the base plate 3 when the temperature is lowered. The vertical support 100 is formed in a plate-like or columnar shape, and the horizontal support 110 is also formed in a plate-like or columnar shape, but the dimensions and shapes of the vertical support 100 and the horizontal support 110 are not particularly limited. yes.

(Method for manufacturing three-dimensional object)
Next, a method for manufacturing a three-dimensional object according to this embodiment using the three-dimensional modeling apparatus 1 will be described. FIG. 2 is a diagram showing the flow of forming the vertical support 100 and the lateral support 110 for the three-dimensional object, and FIG. 3 is a diagram showing the flow of forming the three-dimensional object 120 to be manufactured. . In the following description, the supporting dissolution layer 82 constituting the vertical support 100 and the lateral support 110 and the modeling dissolving layer 83 constituting the three-dimensional object 120 are exaggerated for convenience of explanation. It differs from the actual one.

First, as shown in FIG. 2A, the plate driving section 31 (see FIG. 1) is driven to position the base plate 3 at a position lower than the upper end edge of the layered manufacturing chamber 32 by a predetermined amount.

Subsequently, as shown in FIG. 2B, the dispenser 4 supplies raw material powder onto the base plate 3 . As a result, a powder layer 81 made of raw material powder is formed on the base plate 3 .

Subsequently, as shown in FIG. 2C, the powder layer 81 is irradiated with an electron beam from the irradiation head 5 . At this time, the irradiation head 5 switches the irradiation of the electron beam on and off while being moved across the base plate 3 . In the powder layer 81 irradiated with the electron beam, a melted support layer 82 made of melted raw material powder is formed. FIG. 2(c) shows only the dissolution layer 82 for support that constitutes the vertical support 100, and a plurality of dissolution layers 82 for support are formed with a gap therebetween. An electron beam is intermittently irradiated when forming such a plurality of dissolution layers 82 for support.

Subsequently, as shown in FIG. 2(d), the plate driving section 31 is driven to lower the base plate 3 by a predetermined amount. After that, the dispenser 4 supplies raw material powder onto the base plate 3 again. As a result, a new powder layer 81 made of raw material powder is formed on the base plate 3 .

Thereafter, as shown in FIG. 2(e), an electron beam is irradiated in the same manner as described above to form a new dissolution layer 82 for support on the new powder layer 81. Next, as shown in FIG. FIG. 2( e ) shows the dissolution layer 82 for support that integrally constitutes the vertical support 100 and the lateral support 110 . In FIG. 2(e), a portion of the dissolvable support layer 82 that constitutes the lateral support 110 is positioned between adjacent portions of the dissolvable support layer 82 that constitute the vertical support 100. In FIG. there is

Subsequently, as shown in FIG. 2(f), the plate driving section 31 is driven to lower the base plate 3 by a predetermined amount. After that, the dispenser 4 supplies raw material powder onto the base plate 3 again. As a result, a new powder layer 81 made of raw material powder is formed on the base plate 3 .

After that, as shown in FIG. 2(g), the electron beam is irradiated in the same manner as described above to form a new dissolution layer 82 for support on the new powder layer 81. Next, as shown in FIG. The newly formed dissolving layer 82 for support in FIG.

By repeating the supply of the raw material powder onto the base plate 3 and the irradiation of the raw material powder with the electron beam (support forming step) as described above, the vertical support 100 and the horizontal support 100 as shown in FIG. A support 110 is formed. In the vertical support 100 and the lateral support 110 shown in FIG. 2(h), the lateral support 110 is connected to both of the adjacent vertical supports 100. As shown in FIG. Adjacent lateral supports 110 are formed at the same height in the stacking direction.

Next, a three-dimensional object 120 (see FIG. 3(n)) to be manufactured is formed. At this time, first, as shown in FIG. 3(i), the plate driving section 31 is driven to lower the base plate 3 by a predetermined amount.

After that, as shown in FIG. 3(j), the dispenser 4 supplies raw material powder onto the base plate 3, and the raw material powder covers the vertical support 100 and the horizontal support 110 to form a new powder layer 81. do.

Thereafter, as shown in FIG. 3(k), the powder layer 81 is irradiated with an electron beam from the irradiation head 5. Then, as shown in FIG. At this time, the irradiation head 5 switches ON/OFF of irradiation of the electron beam while being moved across the base plate 3 in the same manner as described above. In FIG. 3(k), a powder layer 81 irradiated with an electron beam is formed with a modeling melt layer 83 made of raw material powder melted by the electron beam, and a supporting melt layer 82 is formed. . When the three-dimensional object to be modeled is formed with a recess that is recessed from the end face, for example, as shown in FIG. .

Subsequently, as shown in FIG. 3(l), the plate driving section 31 is driven to lower the base plate 3 by a predetermined amount. After that, the dispenser 4 supplies raw material powder onto the base plate 3 again. As a result, a new powder layer 81 made of raw material powder is formed on the base plate 3 .

After that, as shown in FIG. 3(m), the electron beam is irradiated in the same manner as described above to form a new melting layer 83 for modeling on the new powder layer 81. Next, as shown in FIG. The newly formed dissolution layer 83 for modeling in FIG.

By repeating the supply of the raw material powder onto the base plate 3 and the irradiation of the raw material powder with the electron beam as described above (modeling step), a three-dimensional object 120 as shown in FIG. 3(n) is formed. . After that, preheating is canceled and the three-dimensional object 120 is cooled to complete the manufacture of the three-dimensional object 120 .

In the method for manufacturing the three-dimensional object 120 according to the present embodiment as described above, when the preheating is canceled, the temperature inside the chamber 2 is lowered, and the temperature of the base plate 3 and the like is also lowered. At this time, for example, if the linear expansion coefficient of the base plate 3 is larger than the linear expansion coefficient of the three-dimensional object 120, the base plate 3 shrinks more than the three-dimensional object 120 during cooling, causing the base plate 3 to contract vertically. A stress may be imparted to the three-dimensional object 120 through the directional support 100 and into the three-dimensional object 120 .

However, in this embodiment, lateral supports 110 are provided between adjacent vertical supports 100 . As a result, when the contraction of the base plate 3 is transmitted to the three-dimensional object 120 via the vertical support 100, the lateral support 110 is compressed, so the force generated by the contraction of the base plate 3 is transmitted to the three-dimensional object 120. is suppressed.

As a result, in the present embodiment, deformation of the three-dimensional object 120 is suppressed, so that the modeling accuracy of the three-dimensional object 120 can be improved.

By the way, in this embodiment, as is clear from FIG. A vertical support 100 and a lateral support 110 are formed to be larger than . With such a configuration, it is possible to prevent the number of lateral supports 110 from becoming excessively large.

Further, in the present embodiment, the shear strength of the joining portion of one vertical support 100 to the base plate 3 is lower than the compressive strength of one lateral support 110 adjacent to the vertical support 100. A vertical support 100 and a lateral support 110 are formed. In such a configuration, when the base plate 3 and the three-dimensional object 120 contract after preheating is canceled, the joint portion of the vertical support 100 to the base plate 3 is likely to be sheared, and the vertical support 100 is easily separated from the base plate 3 , it is possible to effectively suppress the force generated by contraction of the base plate 3 from being transmitted to the three-dimensional object 120 . As a result, it is possible to effectively protect the three-dimensional object 120 from deformation.

Next, a modification of the above embodiment will be described.

In the above-described embodiment, when viewed in the above-described lamination direction in which the dissolution layer 82 for support is laminated, the plurality of vertical supports 100 are formed so as to be aligned in a straight line in the direction crossing the lamination direction. A horizontal support 110 is formed between each of the plurality of vertical supports 100 aligned in parallel. Lateral supports 110 that are adjacent in the crossing direction, in other words, adjacent to each other with the vertical support 100 interposed therebetween are formed at the same height position in the stacking direction.

On the other hand, in the modification shown in FIG. 4, the lateral supports 110 that are adjacent in the cross direction described above, in other words, adjacent to each other with the vertical support 100 interposed therebetween, are shifted from each other in the stacking direction.

When the lateral support 110 as shown in FIG. 4 is formed, deformation of the three-dimensional object 120 can be effectively suppressed. That is, when a plurality of lateral supports 110 are connected in a straight line, the plurality of lateral supports 110 form a relatively large columnar object, and solidification shrinkage of the lateral supports 110 as a whole occurs. As a result, the contraction of the lateral supports 110 increases the risk of deformation of the three-dimensional object 120 . In this case, it may be necessary to take measures such as increasing the number of vertical supports 100 in order to suppress this risk.

On the other hand, when the positions of the lateral supports 110 are shifted as in the modified example of FIG. It is possible to effectively suppress deformation of the three-dimensional object 120 due to contraction without increasing the number of vertical supports 100 .

Moreover, in the modification shown in FIG. 5, the horizontal support 110 is formed so as to be divided into a plurality of parts between the adjacent vertical supports 100. As shown in FIG. The lateral support 110 shown in FIG. 5 is composed of a first half portion 110A and a second half portion 110B that are divided at approximately the midpoint between adjacent vertical supports 100. As shown in FIG. The positions and number of divisions of the lateral support 110 are not particularly limited.

Even if the lateral support 110 is split as shown in FIG. 5, the first and second halves 110A and 110B may collide during contraction or provide compression resistance by sandwiching the raw material powder between them. Therefore, deformation of the three-dimensional object 120 is suppressed. In addition, removal of the lateral support 110 is facilitated, thereby improving productivity.

Next, examples and comparative examples will be described. In the example, the three-dimensional object 120 was formed after forming the vertical support 100 and the lateral support 110 described in the above embodiment. In addition, in the comparative example, a three-dimensional object similar to the example was formed under the same conditions as in the example except that the lateral support 110 was not formed.

In the examples, the composition by mass % is C: 0.1%, Ni: 0.6%, Cr: 10.5%, W: 2.5%, Co: 1%, N: 0.05% A metal powder containing Fe as the balance was prepared by gas atomization and classified to 45 to 125 μm, and used as a raw material powder.

The beam current value for the electron beam was set to 15 mA, and the scanning speed of the electron beam over the raw material powder was set to 1 m/s.

As the base plate 3, a SUS316 steel plate having a square shape in a plan view and having a width of 150 mm, a depth of 150 mm, and a thickness of 10 mm was used. The width is the distance in the horizontal direction of the base plate 3 shown in FIG. directional distance. The width, depth, and thickness of the three-dimensional object 120 and supports 100, 110 below are also defined in the same directions as above.

A three-dimensional object 120 was formed from a position 10 mm away from the base plate 3 . As shown in FIG. 3(n), the three-dimensional object 120 has a plate-like portion 121 and a pair of legs 122 hanging from the plate-like portion 121. As shown in FIG. The plate-like portion 121 has a square shape in plan view, and has a width W of 100 mm, a depth of 100 mm, and a thickness T of 10 mm. The leg 122 has a width of 10 mm, a depth of 100 mm, and a thickness H of 10 mm.

Regarding the vertical support 100, below the legs 122, the vertical support 100 was made with a width of 2 mm, a depth of 100 mm, and a thickness of 10 mm. A vertical support 100 having a width of 2 mm, a depth of 100 mm, and a thickness of 20 mm was created between the pair of legs 122 . Also, the vertical supports 100 were formed so as to line up at intervals of 10 mm.

A lateral support 110 was formed at a position 5 mm away from the base plate 3 . The lateral support 110 was formed with a width of 10 mm, a depth of 100 mm, and a thickness of 5 mm.

The temperature of the raw material powder heated by preheating was set to 1000 degrees. Preheating was performed by electron beam irradiation.

After cooling the three-dimensional object 120 according to the example and the three-dimensional object according to the comparative example formed under the above conditions, the dimension between the pair of legs 122 was measured and compared. The dimension of the three-dimensional object 120 of the example was deformed by 1 mm from the design dimension (target value), and the dimension of the three-dimensional object of the comparative example was deformed by 4 mm from the design dimension (target value). . This result also confirms that the lateral support 110 is effective.

An embodiment and its modification have been described above, but the above embodiment and modification are presented as examples and are not intended to limit the scope of the invention. The novel embodiments and modifications can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. The above-described embodiments, modifications, and other modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 1... Three-dimensional modeling apparatus, 2... Chamber, 3... Base plate, 31... Plate drive part, 32... Layered modeling chamber, 4... Dispenser, 41... Powder tank, 5... Irradiation head, 6... Controller, 81... Powder layer, 82... Melting layer for support, 83... Melting layer for modeling, 100... Vertical direction support, 110... Lateral direction support, 120... Three-dimensional object

Claims (7)

By repeating the supply of the raw material powder onto the base plate and the formation of the molten support layer made of the raw material powder melted by irradiating the raw material powder with an energy beam, a plurality of the molten support layers are laminated, a support forming step of forming a plurality of vertical supports extending upwardly from the base plate and at least one horizontal support extending from one of the adjacent vertical supports toward the other;
Supplying the raw material powder onto the base plate so as to cover the vertical support and the horizontal support, and melting the raw material powder on the vertical support and the horizontal support by irradiating an energy beam. a forming step of forming a three-dimensional object on the vertical support and the lateral support by repeating the formation of the molten layer for modeling made of the raw material powder and laminating a plurality of the molten layer for modeling; with
When viewed in the lamination direction in which the dissolution layer for support is laminated, the plurality of vertical supports are formed so as to be aligned in a straight line in a direction crossing the lamination direction,
the horizontal support is formed between each of the plurality of vertical supports arranged in the cross direction;
the lateral supports are formed such that positions of the lateral supports adjacent to each other in the cross direction are shifted from each other in the stacking direction;
A method for manufacturing a three-dimensional object, wherein the support forming step and the modeling step are performed in an environment maintained at a high temperature. By repeating the supply of the raw material powder onto the base plate and the formation of the molten support layer made of the raw material powder melted by irradiating the raw material powder with an energy beam, a plurality of the molten support layers are laminated, a support forming step of forming a plurality of vertical supports extending upwardly from the base plate and at least one horizontal support extending from one of the adjacent vertical supports toward the other;
Supplying the raw material powder onto the base plate so as to cover the vertical support and the horizontal support, and melting the raw material powder on the vertical support and the horizontal support by irradiating an energy beam. a forming step of forming a three-dimensional object on the vertical support and the lateral support by repeating the formation of the molten layer for modeling made of the raw material powder and laminating a plurality of the molten layer for modeling; with
the lateral support is formed so as to be divided into a plurality of adjacent vertical supports;
A method for manufacturing a three-dimensional object, wherein the support forming step and the modeling step are performed in an environment maintained at a high temperature. By repeating the supply of the raw material powder onto the base plate and the formation of the molten support layer made of the raw material powder melted by irradiating the raw material powder with an energy beam, a plurality of the molten support layers are laminated, a support forming step of forming a plurality of vertical supports extending upwardly from the base plate and at least one horizontal support extending from one of the adjacent vertical supports toward the other;
Supplying the raw material powder onto the base plate so as to cover the vertical support and the horizontal support, and melting the raw material powder on the vertical support and the horizontal support by irradiating an energy beam. a forming step of forming a three-dimensional object on the vertical support and the lateral support by repeating the formation of the molten layer for modeling made of the raw material powder and laminating a plurality of the molten layer for modeling; with
The vertical support and the lateral support are formed such that the shear strength of the joining portion of the vertical support to the base plate is lower than the compressive strength of the lateral support adjacent to the vertical support,
A method for manufacturing a three-dimensional object, wherein the support forming step and the modeling step are performed in an environment maintained at a high temperature. The vertical direction is such that the total projected area of the lateral support onto the base plate in the lamination direction in which the dissolution layer for support is laminated is larger than the total bonding area of the vertical support and the base plate. 4. A method for manufacturing a three-dimensional object according to any one of claims 1 to 3 , wherein supports and said lateral supports are formed. a chamber, a base plate arranged in the chamber, a dispenser for supplying raw material powder onto the base plate, an irradiation head for irradiating the raw material powder with an energy beam, and operation of the dispenser and the irradiation head being controlled. A three-dimensional modeling apparatus comprising a controller for
The controller controls the dispenser and the irradiation head, and repeats the supply of the raw material powder onto the base plate and the formation of a support melting layer made of the raw material powder melted by irradiating the raw material powder with an energy beam. By stacking a plurality of dissolution layers for support, a plurality of vertical supports extending upwardly from the base plate and at least one horizontal support extending from one of the adjacent vertical supports toward the other. and supplying the raw material powder onto the base plate so as to cover the vertical support and the lateral support, and energy for the raw material powder on the vertical support and the lateral support A three-dimensional object is formed on the vertical support and the horizontal support by repeating the formation of the molten layer for modeling made of the raw material powder melted by beam irradiation and stacking a plurality of the molten layers for modeling. death,
Under the control of the controller, when viewed in the lamination direction in which the dissolution layer for support is laminated, a plurality of vertical supports are formed so as to be aligned in a straight line in a direction intersecting the lamination direction, and in the intersecting direction The horizontal supports are formed between each of the plurality of vertical supports arranged side by side, and the horizontal supports are formed such that the positions of the horizontal supports adjacent to each other in the cross direction in the stacking direction are shifted from each other. A three-dimensional modeling device. a chamber, a base plate arranged in the chamber, a dispenser for supplying raw material powder onto the base plate, an irradiation head for irradiating the raw material powder with an energy beam, and operation of the dispenser and the irradiation head being controlled. A three-dimensional modeling apparatus comprising a controller for
The controller controls the dispenser and the irradiation head, and repeats the supply of the raw material powder onto the base plate and the formation of a support melting layer made of the raw material powder melted by irradiating the raw material powder with an energy beam. By stacking a plurality of dissolution layers for support, a plurality of vertical supports extending upwardly from the base plate and at least one horizontal support extending from one of the adjacent vertical supports toward the other. and supplying the raw material powder onto the base plate so as to cover the vertical support and the lateral support, and energy for the raw material powder on the vertical support and the lateral support A three-dimensional object is formed on the vertical support and the horizontal support by repeating the formation of the molten layer for modeling made of the raw material powder melted by beam irradiation and stacking a plurality of the molten layers for modeling. death,
The three-dimensional modeling apparatus according to claim 1, wherein the horizontal support is divided into a plurality of adjacent vertical supports under the control of the controller. a chamber, a base plate arranged in the chamber, a dispenser for supplying raw material powder onto the base plate, an irradiation head for irradiating the raw material powder with an energy beam, and operation of the dispenser and the irradiation head being controlled. A three-dimensional modeling apparatus comprising a controller for
The controller controls the dispenser and the irradiation head, and repeats the supply of the raw material powder onto the base plate and the formation of a support melting layer made of the raw material powder melted by irradiating the raw material powder with an energy beam. By stacking a plurality of dissolution layers for support, a plurality of vertical supports extending upwardly from the base plate and at least one horizontal support extending from one of the adjacent vertical supports toward the other. and supplying the raw material powder onto the base plate so as to cover the vertical support and the lateral support, and energy for the raw material powder on the vertical support and the lateral support A three-dimensional object is formed on the vertical support and the horizontal support by repeating the formation of the molten layer for modeling made of the raw material powder melted by beam irradiation and stacking a plurality of the molten layers for modeling. death,
The controller controls the vertical support and the horizontal support so that the shear strength of the joint portion of the vertical support to the base plate is lower than the compressive strength of the horizontal support adjacent to the vertical support. A three-dimensional fabrication device in which directional supports are formed .