JP7276007B2 - Three-dimensional modeling method - Google Patents

Description

The present invention relates to a three-dimensional modeling method for modeling a three-dimensional object.

Conventionally, as a three-dimensional modeling method, for example, as described in Japanese Unexamined Patent Application Publication No. 2018-523008, a powder material is irradiated with an electron beam to melt and solidify the powder material, thereby forming a three-dimensional object. It has been known. In this method, a support (supporting element) may be shaped together with the object, such as a horizontally extending portion of the object being supported by the support.

Japanese Patent Publication No. 2018-523008

By the way, in the three-dimensional modeling method described above, it is necessary to remove the support adhered to the object after the object is modeled. For example, it is conceivable to blow the powder material together with air onto the support to break and remove the pre-sintered material in the support. However, although it is easy to remove the pre-sintered material near the surface, if the pre-sintered material is deposited deeply, it takes labor to remove the pre-sintered material to a deep place.

Therefore, it is desired to develop a three-dimensional modeling method capable of efficiently removing a support that supports an object.

A three-dimensional fabrication method according to an aspect of the present disclosure is a three-dimensional fabrication method that irradiates a powder material with an energy beam to melt the powder material to form a three-dimensional object, wherein the powder material is irradiated with the energy beam. , a molding step of molding an object and molding a support including a rod-shaped member below the object, a pulling-out step of pulling out the rod-shaped member from the molded support, and a space formed by pulling out the rod-shaped member. and a removing step of blowing air and particles to remove the support. According to this three-dimensional modeling method, an object is modeled, a support including a rod-shaped member is modeled below the object, the rod-shaped member is pulled out from the modeled support, and a space is formed by pulling out the rod-shaped member. The support is removed by blowing air and granules against it. Therefore, air and particles can be blown into the inside of the support, and the support can be easily removed. Therefore, the object can be modeled efficiently.

In addition, in the three-dimensional modeling method according to an aspect of the present disclosure, the modeling step may be performed with the rod-shaped member oriented in the vertical direction.

In addition, in the three-dimensional modeling method according to an aspect of the present disclosure, the modeling step may be performed with the rod-shaped member oriented horizontally.

According to the three-dimensional modeling method of the present disclosure, the support for supporting the object can be removed efficiently.

1 is a schematic configuration diagram of a three-dimensional modeling apparatus used in a three-dimensional modeling method according to a first embodiment of the present disclosure; FIG. FIG. 4 is an explanatory diagram of an object and a support that are modeled by the three-dimensional modeling method according to the first embodiment; Figure 3 is a cross-sectional view of the body and support on III-III of Figure 2; It is a figure which shows the process of the three-dimensional fabrication method which concerns on 1st embodiment. FIG. 5 is an explanatory diagram of an object and a support that are modeled by a three-dimensional modeling method according to a second embodiment; Figure 6 is a cross-sectional view of the body and support on IV-IV of Figure 5; It is explanatory drawing of the extraction process of the three-dimensional fabrication method which concerns on 2nd embodiment. It is explanatory drawing of the removal process of the three-dimensional fabrication method which concerns on 2nd embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

FIG. 1 is a schematic configuration diagram of a three-dimensional modeling apparatus used in a three-dimensional modeling method according to the first embodiment of the present disclosure. The three-dimensional modeling method according to the present embodiment is a method of forming a three-dimensional object O by irradiating the powder material A with an electron beam B to melt the powder material A. FIG. Here, before explaining the three-dimensional modeling method, the three-dimensional modeling apparatus 1 used for the three-dimensional modeling method will be explained.

The three-dimensional modeling apparatus 1 is an apparatus that irradiates a powder material A with an electron beam B to melt and solidify the powder material A, thereby modeling a three-dimensional object O. FIG. The three-dimensional modeling apparatus 1 performs, for example, a process of irradiating the powder material A with an electron beam B to preheat the powder material A, and a process of irradiating the powder material A with the electron beam B to melt the powder material A to form an object. The process of forming a part of O is repeated, and the object O is formed by layering the solidified powder material. Preheating, also referred to as preheating, is a process of heating the powder material A to a temperature below the melting point of the powder material A before the object O is shaped. By this preheating, the powder material A is heated and pre-sintered, the accumulation of negative charges in the powder material A due to the irradiation of the electron beam B is suppressed, and the powder material A scatters when the electron beam B is irradiated. It is possible to suppress the rising smoke phenomenon. Here, preliminary sintering is the bonding of the particles of the powder material A by heating, and is a state before the particles are completely melted and bonded.

A three-dimensional modeling apparatus 1 includes a beam emitting section 2 , a modeling section 3 and a control section 4 . The beam emitting unit 2 emits an electron beam B to the powder material A of the modeling unit 3 to melt the powder material A. As shown in FIG. The electron beam B is an energy beam formed by linear motion of electrons, which are charged particles. Further, the beam emitting unit 2 irradiates the powder material A with the electron beam B to preheat the powder material A, and then irradiates the powder material A with the electron beam B to melt the powder material A into a three-dimensional shape. We are going to shape the object O.

The beam emission section 2 includes an electron gun section 21 , an aberration coil 22 , a focus coil 23 , a deflection coil 24 and a scattering detector 25 . The electron gun section 21 is electrically connected to the control section 4, operates upon receiving a control signal from the control section 4, and emits an electron beam B. As shown in FIG. The electron gun section 21 is provided, for example, so as to emit an electron beam B downward. The aberration coil 22 is electrically connected to the controller 4 and operates upon receiving a control signal from the controller 4 . The aberration coil 22 is installed around the electron beam B emitted from the electron gun section 21 and corrects the aberration of the electron beam B. FIG. The focus coil 23 is electrically connected to the controller 4 and operates upon receiving a control signal from the controller 4 . The focus coil 23 is installed around the electron beam B emitted from the electron gun part 21, converges the electron beam B, and adjusts the focus state at the irradiation position of the electron beam B. FIG. The deflection coil 24 is electrically connected to the controller 4 and operates upon receiving a control signal from the controller 4 . The deflection coil 24 is installed around the electron beam B emitted from the electron gun section 21, and adjusts the irradiation position of the electron beam B according to a control signal. Since the deflection coil 24 performs electromagnetic beam deflection, the scanning speed during irradiation of the electron beam B can be increased compared to mechanical beam deflection. The electron gun section 21, the aberration coil 22, the focus coil 23, and the deflection coil 24 are installed, for example, in a column 26 having a cylindrical shape. Note that the installation of the aberration coil 22 may be omitted.

The scattering detector 25 is a device that detects scattering of the powder material A by irradiation of the electron beam B to the powder material A. As shown in FIG. In other words, the scattering detector 25 detects a smoke phenomenon in which the powder material A scatters and rises like a mist when the electron beam B is applied to the powder material A. FIG. As the scattering detector 25, for example, an X-ray detector is used. In this case, the scattering detector 25 detects X-rays generated when smoke is generated, and the scattering of the powder material A can be detected by detecting the X-rays. Scatter detector 25 is mounted, for example, on column 26 and positioned to face electron beam B. As shown in FIG. In addition, the scattering detector 25 may be provided in the vicinity of the irradiation area of the powder material A in some cases. Moreover, installation of the scattering detector 25 may be omitted.

The molding section 3 is a part for molding the desired object O, and the powder material A is arranged in the chamber 30 . The shaping section 3 is provided below the beam emitting section 2 . The modeling section 3 has a box-shaped chamber 30 , and in the chamber 30 , a plate 31 , an elevator 32 , a powder supply mechanism 33 and a hopper 34 are provided. The chamber 30 is coupled with the column 26, and the internal space of the chamber 30 communicates with the internal space of the column 26 in which the electron gun section 21 is arranged.

The plate 31 is a member that supports the object O to be shaped. The object O is shaped on the plate 31, and the plate 31 supports the object O being shaped. A circular plate-like body is used as the plate 31, for example. The plate 31 is arranged on an extension line of the emission direction of the electron beam B, and is provided, for example, in the horizontal direction. The plate 31 is arranged to be supported by an elevating stage 35 installed below, and moves vertically together with the elevating stage 35 . The elevator 32 is a device that raises and lowers the elevation stage 35 and the plate 31 . The elevator 32 is electrically connected to the controller 4 and operates upon receiving a control signal from the controller 4 . For example, the elevator 32 moves the plate 31 upward together with the elevator stage 35 at the beginning of the modeling of the object O, and lowers the plate 31 each time the powder material A is melted and solidified on the plate 31 and stacked. Any mechanism may be used as the elevator 32 as long as it can lift the plate 31 up and down.

On the plate 31 the support 8 together with the object O is shaped. The support 8 is a support member that supports part or all of the object O from below. The support 8 includes a rod-shaped member 81 . The rod-shaped member 81 is a member for breaking and removing the support 8 . This rod-shaped member 81 is shaped, for example, in the vertical direction. Details of the support 8 will be described later.

The plate 31 is arranged in a build tank 36 . A modeling tank 36 is installed in the lower part of the chamber 30 . The modeling tank 36 is, for example, cylindrical and extends in the moving direction of the plate 31 . The modeling tank 36 is formed with a circular cross-section that is concentric with the plate 31 . A lift stage 35 is formed to match the inner shape of the modeling tank 36 . That is, when the inner shape of the modeling tank 36 is circular in horizontal cross section, the external shape of the elevating stage 35 is also circular. This makes it easier to prevent the powder material A supplied to the modeling tank 36 from leaking downward from the lifting stage 35 . In addition, in order to prevent the powder material A from leaking downward from the lifting stage 35, a sealing material may be provided at the outer edge of the lifting stage 35. FIG. In addition, the shape of the modeling tank 36 is not limited to a cylindrical shape, and may be a rectangular tubular shape having a rectangular cross section.

The powder supply mechanism 33 is a member that supplies the powder material A above the plate 31 and smoothes the surface of the powder material A, and functions as a recoater. For example, the powder supply mechanism 33 is a rod-shaped or plate-shaped member that moves in the horizontal direction to supply the powder material A to the irradiation area R of the electron beam B and level the surface of the powder material A. The movement of the powder supply mechanism 33 is controlled by an actuator and mechanism (not shown). As a mechanism for leveling the powder material A, a mechanism other than the powder supply mechanism 33 can be used. The hopper 34 is a container for containing the powder material A. A discharge port 34a for discharging the powder material A is formed in the lower part of the hopper 34 . The powder material A discharged from the discharge port 34 a flows onto the plate 31 or is supplied onto the plate 31 by the powder supply mechanism 33 . A plate 31 , an elevator 32 , a powder feeding mechanism 33 and a hopper 34 are installed within the chamber 30 . The inside of the chamber 30 is in a vacuum or almost vacuum state. Further, the inside of the chamber 30 is heated by a heater (not shown) or the like, and is in a high temperature state. As a mechanism for supplying the powder material A in layers onto the plate 31, a mechanism other than the powder supply mechanism 33 and the hopper 34 can be used.

Powder material A is composed of a large number of powder bodies. As the powder material A, metal powder is used, for example. As the powder material A, granules having a particle diameter larger than that of the powder may be used as long as they can be melted and solidified by irradiation with the electron beam B.

The control unit 4 is an electronic control unit that controls the entire apparatus of the three-dimensional modeling apparatus 1, and includes, for example, a computer including a CPU, a ROM, and a RAM. The control unit 4 performs elevation control of the plate 31, operation control of the powder supply mechanism 33, emission control of the electron beam B, operation control of the deflection coil 24, and scattering detection of the powder material A. The control unit 4 controls the elevation of the plate 31 by outputting a control signal to the elevator 32 to operate the elevator 32 and adjust the vertical position of the plate 31 . The controller 4 operates the powder supply mechanism 33 before the electron beam B is emitted to supply the powder material A onto the plate 31 and spread it evenly. The control unit 4 outputs a control signal to the electron gun unit 21 to control the emission of the electron beam B so that the electron beam B is emitted from the electron gun unit 21 .

The controller 4 controls the irradiation position of the electron beam B by outputting a control signal to the deflection coil 24 as operation control of the deflection coil 24 . For example, when preheating the powder material A, the control unit 4 outputs a control signal to the deflection coil 24 of the beam emission unit 2 to scan and irradiate the electron beam B on the plate 31 .

When the object O and the support 8 are modeled, the controller 4 uses, for example, three-dimensional CAD (Computer-Aided Design) data of the object O to be modeled and the support 8 . The three-dimensional CAD data of the object O and the support 8 are shape data of the object O and the support 8 that are input in advance. The control unit 4 generates two-dimensional slice data based on the three-dimensional CAD data. The slice data is, for example, horizontal cross-sectional data of the object O to be shaped and the support 8, and is a collection of a large number of data corresponding to vertical positions. Based on this slice data, the control unit 4 determines the area of the powder material A to be irradiated with the electron beam B, and outputs a control signal to the deflection coil 24 according to the area. As a result, the control unit 4 outputs a control signal to the deflection coil 24 of the beam emission unit 2 to irradiate the powder material A in the irradiation area R with the electron beam B. FIG.

2 is a side view of the object O and the support 8, and FIG. 3 is a horizontal cross-sectional view of the object O and the support 8 along III-III in FIG. A part of the object O is modeled while being supported by the support 8 . That is, the horizontally extending portion of the object O is shaped while being supported by the support 8 that is shaped below. The support 8 includes a rod-shaped member 81 . For example, the support 8 has a rod-shaped member 81 and a support member 82 . The support member 82 is a member that supports the object O. As shown in FIG. The support member 82 is a vertically extending plate. By arranging a plurality of support members 82 below the object O and modeling, the object O can be efficiently supported by the support members 82 . The support members 82 are arranged in a lattice, for example. The upper end of the support member 82 is joined to the object O. As shown in FIG. For example, only a portion of the support member 82 is joined to the object O at its upper end. As a result, the bonding area of the support member 82 with respect to the object O can be reduced, and the support member 82 can be easily separated from the object O. FIG. The lower end of the support member 82 may be positioned above the lower end of the object O. FIG. In this case, the support 8 can be made smaller, and the manufacturing cost can be reduced. Even if the lower end of the support member 82 is not in contact with the plate 31 , the support member 82 can support the object O by being supported by the powder material A surrounding the support member 82 .

A rod-shaped member 81 is provided in a region surrounded by the plurality of support members 82 . The rod-shaped member 81 is a rod-shaped member, and is formed to have a circular cross section, for example. A temporary sintering material 83 exists around the rod-shaped member 81 . The temporary sintered material 83 is the powder material A that is temporarily sintered. The powder material A is temporarily sintered by preheating or heat in the chamber 30 and adheres to the periphery of the rod-shaped member 81 . The rod-shaped member 81 is formed vertically. The rod-shaped member 81 is provided with its upper end separated from the object O, for example. Due to the gap G between the upper end of the rod-shaped member 81 and the object O, the rod-shaped member 81 is not joined to the object O, so that the rod-shaped member 81 can be easily pulled out. The rod-shaped member 81 is provided, for example, so that its lower end is positioned below the lower end of the support member 82 . That is, the lower end of the rod-shaped member 81 protrudes downward from the support member 82 . Accordingly, by pulling the lower end of the rod-shaped member 81 downward, the rod-shaped member 81 can be easily pulled out.

Next, a three-dimensional modeling method according to this embodiment will be described.

FIG. 4 is a diagram showing an overview of the steps of the three-dimensional modeling method according to this embodiment. (a) of FIG. 4 shows the forming process, (b) of FIG. 4 shows the drawing process, and (c) of FIG. 4 shows the removing process.

As shown in (a) of FIG. 4, first, a modeling process is performed. The modeling step is a step of irradiating the powder material A with the electron beam B to shape the object O and the support 8 . This modeling process is performed by the three-dimensional modeling apparatus 1 . As shown in FIG. 1, in the forming process, for example, each process of spreading the powder material A evenly over the irradiation region R, preheating, and forming the object O and the support 8 is repeatedly performed. At this time, the plate 31 is moved downward each time the spreading, preheating, and shaping of the object O and the support 8 are completed, and the powder material A is layered on the object O and the support 8 being shaped. I will let you. At this time, as shown in FIG. 2, in the support body 8, the rod-shaped member 81 and the support member 82 are formed by melting the powder material A and then solidifying it. The pre-sintered material 83 is formed by pre-sintering particles of the powder material A by preheating or heat in the chamber 30 .

Next, as shown in FIG. 4(b), a drawing process is performed. The pulling step is a step of pulling out the rod-shaped member 81 from the shaped support 8 . FIG. 4B shows the extraction of the bar member 81 from a part of the support 8 . In this pulling-out step, for example, the rod-shaped member 81 is pulled out from between the support members 82 by gripping and pulling the end of the rod-shaped member 81 . Since the end of the rod-shaped member 81 protrudes from the end of the support member 82, the projecting portion can be grasped and the rod-shaped member 81 can be easily pulled out.

The bar-shaped member 81 may be pulled out manually by an operator, using a jig or the like, or using a puller or the like. In addition, in FIG. 4B, the rod-shaped member 81 is pulled downward to be pulled out. The member 81 may be pulled out horizontally. At this time, since the rod-shaped member 81 is not joined to the object O, there is no need to separate the rod-shaped member 81 from the object O, and the rod-shaped member 81 can be easily pulled out from the support 8.

Then, as shown in (c) of FIG. 4, a removal step is performed. The removing step is a step of removing the support 8 by blowing air and granules to the space S formed by pulling out the rod-shaped member 81 . (c) of FIG. 4 shows a step of removing a portion of the support 8 . For example, the removing step is performed using a blasting device. The blasting device is a device that injects air compressed by a compressor or the like from nozzles 91 together with granules. The pressure of the air injected from the blasting device is, for example, 0.3-0.5 MPa. By directing the nozzle 91 toward the space S and ejecting air containing particles from the nozzle 91 , the particles collide with the pre-sintered material 83 together with the air. As a result, the temporary sintering material 83 is crumbled and removed. Here, powder material A, for example, is used as the granules. In this case, the sprayed powder material A and the crushed pre-sintered material 83 can be recovered and reused as the powder material A.

Since the space S extends close to the object O, the air and particles can be blown deep into the support 8. - 特許庁Therefore, the temporary sintering material 83 can be removed efficiently, and the removing process can be performed in a short time. After the temporary sintering material 83 is removed from the support 8, the support member 82 is separated from the object O, and the removal of the support 8 is completed. The separation of the support member 82 may be performed manually by an operator, or may be performed using a jig or a device for separation. After the support 8 is removed from the object O by the removal step, the surface of the object O is polished, etc., and the object O is completed.

As described above, according to the three-dimensional modeling method according to the present embodiment, the object O is modeled, the support body 8 including the rod-shaped member 81 is modeled below the object O, and the modeled support body 8 is formed. The support 8 is removed by blowing air and granules to the space S formed by pulling out the rod-shaped member 81 from the support 8 . Therefore, the air and the particles can be blown into the inside of the support 8, and the support 8 can be easily removed. Therefore, the object O can be modeled efficiently.

For example, if an attempt is made to remove the support 8 without pulling out the rod-shaped member 81 from the support 8, air and particles can be blown only to the surface of the pre-sintered material 83, and the pre-sintered material 83 is removed. It takes a lot of time to remove. On the other hand, in the three-dimensional modeling method according to the present embodiment, the rod-shaped member 81 is pulled out from the support 8, and the air and the particles are blown into the space S formed by the pulling out of the rod-shaped member 81. The body can be sprayed inside the pre-sintered material 83 and the support 8 can be easily removed.

Next, a three-dimensional modeling method according to a second embodiment of the present disclosure will be described.

The three-dimensional modeling method according to the second embodiment is a method in which the rod-shaped member 81 is oriented horizontally in the modeling process. That is, in the three-dimensional modeling method according to the first embodiment described above, the rod-shaped member 81 is oriented vertically in the modeling process. It is different in that it is shaped toward. The three-dimensional modeling method according to this embodiment can also perform the modeling process using the three-dimensional modeling apparatus 1 described above.

FIG. 5 is a diagram showing the modeling process of the three-dimensional modeling method according to this embodiment. FIG. 6 is a cross-sectional view of the object O and the support 8 at VI-VI of FIG. As shown in FIG. 5 , the rod-shaped member 81 is shaped horizontally in the upper part of the support 8 . For example, a plurality of rod-shaped members 81 are arranged and modeled at a position near the object O of the support 8 . The rod-shaped member 81 is arranged so as to pass through the support 8 in the horizontal direction. The modeling of the object O and the support 8 can be performed in the same manner as in the first embodiment.

FIG. 7 is an explanatory diagram of the drawing process, and FIG. 8 is an explanatory diagram of the removing process. As shown in FIG. 7, the rod-shaped member 81 is pulled out from the support 8 . As a result, a space S is formed at a position near the object O on the support 8 . The bar-shaped member 81 may be pulled out manually by an operator, using a jig or the like, or using a puller or the like.

Then, as shown in FIG. 8, a removal step is performed. The removing step is a step of removing the support 8 by blowing air and granules to the space S formed by pulling out the rod-shaped member 81 . For example, the removal step is performed using a blasting device, as in the first embodiment. That is, by directing the nozzle 91 toward the space S and blowing out air containing granules from the nozzle 91, the granules collide with the pre-sintered material 83 together with the air, and the pre-sintered material 83 is collapsed and removed. Here, powder material A, for example, is used as the granules. In this case, the sprayed powder material A and the crushed pre-sintered material 83 can be recovered and reused as the powder material A.

Since the space S is formed so as to penetrate the support 8 , air and particles can be blown to the center position of the support 8 . Therefore, the temporary sintering material 83 can be removed efficiently, and the removing process can be performed in a short time. Also, by removing the temporary sintering material 83 around the space S, the portion of the support 8 that is joined to the object O becomes smaller. Therefore, the support 8 can be separated from the object O without removing all the pre-sintered material 83 . Therefore, the support 8 can be removed efficiently, and the removal time can be shortened. Then, the support member 82 is separated from the object O, and the removal of the support 8 is completed. The separation of the support member 82 may be performed manually by an operator, or may be performed using a jig or a device for separation. After the support 8 is removed from the object O by the removal step, the surface of the object O is polished, etc., and the object O is completed.

As described above, according to the three-dimensional modeling method according to this embodiment, the same effects as those of the above-described first embodiment can be obtained. That is, the object O is modeled, a support 8 including a rod-shaped member 81 is modeled below the object O, the rod-shaped member 81 is pulled out from the modeled support 8, and a space is formed by pulling out the rod-shaped member 81. By blowing air and granules against S, the support 8 is removed. Therefore, the air and the particles can be blown into the inside of the support 8, and the support 8 can be easily removed. Therefore, the object O can be modeled efficiently.

Further, according to the three-dimensional modeling method according to the present embodiment, the rod-shaped member 81 is modeled in the horizontal direction. Then, the support 8 can be removed by pulling out the rod-like member 81 from the support 8 . At this time, since the object O and the support 8 are easily separated, the support 8 can be separated from the object O without removing all the temporary sintering material 83 . Therefore, the support 8 can be removed efficiently.

In the above, each embodiment of the present disclosure has been described in detail. However, the invention is not limited to the embodiments described above. The present invention can be modified in various ways without departing from the gist of the claims.

For example, in each of the above-described embodiments, the rod-shaped member 81 is a cylindrical body with no irregularities on the surface and is pulled out, but the rod-shaped member 81 may have another shape. Specifically, the rod-shaped member 81 may have a square or rectangular cross section. Even in this case, effects similar to those of the three-dimensional modeling method according to each embodiment described above can be obtained.

Moreover, the rod-like member 81 may have spiral projections extending in the longitudinal direction on its surface, or may have a plurality of ring-shaped projections along the longitudinal direction on its surface. In these cases, much of the preliminary sintered material 83 can be removed when the rod-shaped member 81 is pulled out.

Moreover, in each of the above-described embodiments, the object O and the support 8 are formed on the plate 31 that does not rotate, but the plate 31 may be rotated to form the object O and the support 8 . For example, the plate 31 may be rotated with the center of the plate 31 as the rotation axis, and the area for supplying the powder material A, the area for preheating, and the area for modeling may be set in the circumferential direction on the plate 31 . In this case, feeding of powder material A, preheating and shaping can take place simultaneously on plate 31 . Therefore, the modeling process can be performed in a short time, and the object O can be efficiently shaped. In particular, it is effective when forming a large-sized object O.

Further, in each of the above-described embodiments, the case of irradiating the powder material A with the electron beam B as the energy beam to shape the object O has been described. good. For example, the object O may be shaped by irradiating an ion beam.

1 Three-dimensional modeling apparatus 2 Beam emission unit 3 Modeling unit 4 Control unit 8 Support member 21 Electron gun unit 22 Aberration coil 23 Focus coil 24 Deflection coil 25 Scattering detector 31 Plate 32 Elevator 33 Powder supply mechanism 34 Hopper 81 Bar member 82 Support Member 83 Temporarily sintered material A Powder material B Electron beam R Irradiation area O Object

Claims (3)

In a three-dimensional modeling method for forming a three-dimensional object by irradiating a powder material with an energy beam to melt the powder material,
irradiating the powder material with the energy beam to shape the object, and including a rod-shaped member and a support member positioned below the object , wherein a lower end of the rod-shaped member protrudes downward from the support member; a shaping step of shaping a support that is
a pulling step of pulling out the rod-shaped member from the shaped support;
a removing step of removing the support by blowing air and granules into the space formed by pulling out the rod-shaped member;
Three-dimensional modeling method including. In the modeling step, the rod-shaped member is shaped in a vertical direction.
The three-dimensional fabrication method according to claim 1. In the shaping step, the rod-shaped member is shaped in a horizontal direction.
The three-dimensional fabrication method according to claim 1.

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