JP2018145526A - Three-dimensional lamination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce quality reduction of a three-dimensional article.SOLUTION: A three-dimensional lamination device 1 forms a three-dimensional article by laminating a molding layer on a base part 100. The three-dimensional lamination device 1 has: a powder feed part for feeding a powder material; a light irradiation part for irradiating light beam to the powder material and sintering or dissolving and solidifying at least a part of the powder material to which the light beam is irradiated to form a molding layer; a three-dimensional lamination chamber 2 sealed from outside and housing the powder feed part, the light irradiation part, and the base part 100; a gas discharge part 37 for discharging a gas in the three-dimensional lamination chamber 2; and a gas introduction part 38 for introducing a prescribed gas into the three-dimensional lamination chamber 2. The gas discharge part 37 discharges the gas in the three-dimensional lamination chamber 2 and the gas introduction part 38 introduces the prescribed gas, and then a prescribed gas atmosphere is made in the three-dimensional lamination chamber 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a three-dimensional laminating apparatus for producing a three-dimensional shape object by laminating.

  As a technique for manufacturing a three-dimensional shape, a layered manufacturing technique for manufacturing a three-dimensional shape by irradiating a metal powder material with a light beam is known. For example, Patent Document 1 discloses a three-dimensional shape in which a powder layer formed of a metal powder material is irradiated with a light beam to form a sintered layer, and a plurality of sintered layers are laminated integrally by repeating this process. A method for manufacturing a shaped object is described.

JP 2006-124732 A

  By the way, when manufacturing a three-dimensional shape thing, alteration, such as oxidation, may arise in metal powder material, for example. When the metal powder material is altered, the quality of the three-dimensional shape may be deteriorated.

  An object of this invention is to provide the three-dimensional lamination apparatus which suppresses the quality degradation of a three-dimensional shaped object.

  In order to solve the above-described problems and achieve the object, the three-dimensional laminating apparatus of the present invention is a three-dimensional laminating apparatus that forms a three-dimensional shaped object by laminating a molding layer on a base part, and a powder material A powder supply unit that irradiates the powder material with a light beam, and sinters or melts and solidifies at least a part of the powder material irradiated with the light beam to form the molding layer; A three-dimensional stacking chamber that is sealed from the outside and stores the powder supply unit, the light irradiation unit, and the base unit; a gas discharge unit that discharges gas in the three-dimensional stacking chamber; and the three-dimensional stacking chamber. A gas introduction part for introducing a predetermined gas, the gas discharge part discharges the gas in the three-dimensional stacking chamber, and the gas introduction part introduces the predetermined gas, thereby the three-dimensional A predetermined gas atmosphere is set in the stacking chamber.

  This three-dimensional laminating apparatus forms a molding layer in a sealed predetermined gas atmosphere. Therefore, this three-dimensional laminating apparatus can suppress the deterioration of the powder material and suppress the quality deterioration of the three-dimensional shape.

  In the three-dimensional laminating apparatus, the powder supply unit injects the powder material from the opening at the tip toward the base, and the light irradiation unit from the powder supply unit through the opening at the tip. The powder material moving toward the base part is irradiated with a light beam, the powder material is melted, and the melted powder material is solidified on the base part. It is preferable to accommodate the opening of the powder supply unit and the opening of the light irradiation unit. Since this three-dimensional laminating apparatus forms a molding layer in a predetermined gas atmosphere, it is possible to suppress the quality deterioration of the three-dimensional shape.

  In the three-dimensional laminating apparatus, the powder supply unit and the light irradiation unit are configured such that the powder supply unit is disposed concentrically on the outer periphery of the light irradiation unit, and a path through which the light beam of the light irradiation unit passes. An inner tube that surrounds the outer tube, and an outer tube that covers the inner tube and forms a powder flow path through which the powder material flows, and forms a laminated portion that is movable in one direction. It is preferable to have an expansion / contraction part that is attached to a part and expands and contracts along the one direction while sealing the three-dimensional stacking chamber from the outside as the stacking part moves. This three-dimensional laminating apparatus can suitably seal the inside of the three-dimensional laminating chamber even when the powder supply unit moves by having the expansion / contraction part.

  In the three-dimensional laminating apparatus, it is preferable that the laminating unit is movable only in a uniaxial direction. Thereby, the three-dimensional laminating apparatus can arrange the expansion / contraction part that seals the three-dimensional lamination chamber so that it can extend and contract in the uniaxial direction, and can expand and contract following the movement while reducing the load on the expansion / contraction part. It is possible to seal the inside of the three-dimensional stacking chamber more preferably. Thereby, compared with the case where it is set as the structure which moves a laminated part to a multi-axis direction, an apparatus structure can be made small and it can make it easier to maintain sealing performance.

  The three-dimensional laminating apparatus includes a cover unit that is attached to the powder supply unit and the light irradiation unit and covers a portion of the base unit where the molding layer is formed, and a cover unit gas that discharges the gas in the cover unit A discharge part and a cover part gas introduction part for introducing a predetermined gas into the cover part, wherein the cover part gas discharge part discharges the gas in the cover part and the cover part gas introduction part is the predetermined part. By introducing this gas, it is preferable that the cover part has the predetermined gas atmosphere around the base part. In this three-dimensional laminating apparatus, the periphery of the molding layer is placed in a predetermined gas atmosphere by the cover portion. Therefore, this three-dimensional laminating apparatus can more suitably suppress the quality deterioration of the three-dimensional shape object.

  The three-dimensional laminating apparatus includes a spare chamber that connects the three-dimensional laminating chamber and the outside of the three-dimensional laminating chamber and is sealed from the outside of the three-dimensional laminating chamber and the three-dimensional laminating chamber, It is preferable that the pedestal is accommodated in the three-dimensional stacking chamber by being moved from the outside of the three-dimensional stacking chamber into the three-dimensional stacking chamber via the preliminary chamber. Since this three-dimensional laminating apparatus has a spare chamber, it is possible to suitably discharge and introduce gas in the three-dimensional laminating chamber even when the base portion is taken in and out of the three-dimensional laminating chamber.

  According to the present invention, it is possible to suppress deterioration in quality of a three-dimensional shape object.

FIG. 1 is a schematic diagram illustrating a three-dimensional laminating apparatus according to the first embodiment. FIG. 2 is a cross-sectional view of the main part in the AA cross section in FIG. 1 of the laminated head storage chamber. 3 is a drawing of the laminated head storage chamber as viewed from the direction L in FIG. FIG. 4 is a cross-sectional view showing an example of a nozzle of a laminated head. FIG. 5 is a schematic diagram illustrating the configuration of the control device. FIG. 6A is a schematic diagram illustrating an example of a powder introduction unit. FIG. 6B is a schematic diagram illustrating an example of a powder introduction unit. FIG. 7 is a schematic diagram illustrating an example of a powder recovery unit. FIG. 8 is a schematic diagram illustrating a method of manufacturing a three-dimensional shape by the three-dimensional stacking apparatus according to the first embodiment. FIG. 9 is a flowchart illustrating a manufacturing process of a three-dimensional shape by the three-dimensional stacking apparatus according to the first embodiment. FIG. 10 is a cross-sectional view illustrating an example of a cover unit according to the second embodiment. FIG. 11 is a flowchart illustrating a process of adjusting the gas atmosphere around the powder by the cover unit according to the second embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, Moreover, when there are two or more embodiments, what comprises a combination of each Example is also included.

  FIG. 1 is a schematic diagram illustrating a three-dimensional laminating apparatus 1 according to the first embodiment. Here, in the first embodiment, one direction in the horizontal plane is the X-axis direction, and a direction orthogonal to the X-axis direction in the horizontal plane is a direction orthogonal to the Y-axis direction, the X-axis direction, and the Y-axis direction (that is, the vertical direction). ) Is the Z-axis direction.

  A three-dimensional laminating apparatus 1 shown in FIG. 1 is an apparatus that manufactures a three-dimensional shape on a base part 100. The base part 100 is a member that becomes a base on which a three-dimensional shaped object is formed, and is transported to a predetermined position by the three-dimensional laminating apparatus 1 to form a three-dimensional formed object on the surface. The base part 100 of Embodiment 1 is a plate-shaped member. The base unit 100 is not limited to this. The base unit 100 may use a member that becomes a base of a three-dimensional shape object, or may use a member that adds a three-dimensional shape object. A member that becomes a part or product may be used as the base part 100 by forming a three-dimensional formed object at a predetermined position.

  The three-dimensional laminating apparatus 1 includes a three-dimensional laminating chamber 2, a preliminary chamber 3, a laminating head storage chamber 4, a machining unit storage chamber 5, a bed 10, a table unit 11, and a laminating head 12 as a laminating unit. The machining unit 13, the bellows 18, the bellows 19, the control device 20, the shape measuring unit 30, the heating head 31, the machining unit measuring unit 32, the tool changing unit 33, and the nozzle changing unit 34. And a powder introduction part 35, a base movement part 36, a gas discharge part 37, a gas introduction part 38, and a powder recovery part 39.

  The three-dimensional stacking chamber 2 is a casing (chamber) in which a portion other than a designed communication portion such as a connected pipe is sealed from the outside. In addition, the designed communication part is provided with a valve or the like for switching between a sealed state and an open state, and the three-dimensional stacking chamber 2 can be sealed if necessary. The three-dimensional laminating chamber 2 includes a bed 10, a table unit 11, a part of the laminating head 12, a part of the machining unit 13, a part of the heating head 31, a machining unit measuring unit 32, and a tool. The replacement part 33 and the nozzle replacement part 34 are arranged inside.

  The preliminary chamber 3 is provided adjacent to the three-dimensional stacking chamber 2. The spare chamber 3 is sealed from the outside and the three-dimensional stacking chamber 2 except for designed communication portions such as connected pipes. The preliminary chamber 3 is a decompression chamber that connects the outside and the three-dimensional stacking chamber 2. A base moving unit 36 is provided in the preliminary chamber 3. Here, the preliminary chamber 3 is provided with a door 6 having airtightness, for example, at a connection portion with the three-dimensional stacking chamber 2. In addition, the preliminary chamber 3 is connected to the outside by a door 7 having airtightness. In addition, the preliminary chamber 3 is provided with a preliminary chamber gas discharge unit 25 that discharges a gas such as air from the preliminary chamber 3. The preliminary chamber 3 can carry in a necessary member from the outside by opening the door 7. Moreover, the preliminary | backup chamber 3 can carry in and carrying out a member between the three-dimensional lamination | stacking chambers 2 by opening the door 6. FIG. That is, the preliminary chamber 3 is isolated from the outside by closing the door 7 and sealed from the outside. Further, the preliminary chamber 3 is isolated from the three-dimensional stacking chamber by closing the door 6.

  The stacking head storage chamber 4 is provided on the upper surface of the three-dimensional stacking chamber 2 in the Z-axis direction. The stacking head storage chamber 4 is supported by the Z-axis slide portion 4a so as to be movable in the Z-axis direction (the direction of the arrow 102) with respect to the three-dimensional stacking chamber 2. FIG. 2 is a cross-sectional view of the main part of the laminated head storage chamber 4 taken along the line AA in FIG. 3 is a drawing of the laminated head storage chamber 4 as viewed from the direction L in FIG. As shown in FIG. 2, the stacking head storage chamber 4 has an opening 43 on the upper surface 42 in the Z-axis direction of the three-dimensional stacking chamber 2 along the outer periphery of the opening 43 on the lower surface 41 in the Z-axis direction. And connected by a bellows 18 as an expansion / contraction part.

  As shown in FIGS. 2 and 3, the laminated head storage chamber 4 has openings 44 and 45 on the inner side in the radial direction from the bellows 18 of the surface 41. The laminated head storage chamber 4 supports the laminated head 12, the shape measuring unit 30, and the heating head 31. In the stacking head storage chamber 4, a part including the nozzle 23 of the stacking head 12 is protruded toward the three-dimensional stacking chamber 2 through the opening 44. Further, the stacking head storage chamber 4 has a part including the distal end portion 24 of the heating head 31 protruding toward the three-dimensional stacking chamber 2 through the opening 45. The opening 44 and the lamination head 12 are fixed, and the opening 44 and the lamination head 12 are connected to each other in a state of sealing the three-dimensional lamination chamber 2. The opening 45 and the heating head 31 are fixed, and the opening 45 and the lamination head 12 are connected to each other in a state of sealing the three-dimensional lamination chamber 2.

  Next, the bellows 18 will be described. The bellows 18 includes a bellows portion 51 and a guide portion 53. The bellows portion 51 is provided along the outer periphery of the opening 43 of the surface 42 of the three-dimensional stacking chamber 2, and extends from the surface 42 of the three-dimensional stacking chamber 2 to the surface 41 of the stacking head storage chamber 4 along the Z-axis direction. Extend. The bellows portion 51 has a shape in which a crest 55 that extends radially outward and a trough 56 that travels radially inward are alternately repeated along the Z-axis direction. Therefore, the bellows portion 51 can be expanded and contracted along the Z-axis direction.

  The guide part 53 is provided along the outer periphery of the bellows part 51. The guide part 53 has a function of protecting the bellows part 51. The guide portion 53 has sub guide portions 53a, 53b, and 53c. The sub-guide portion 53a extends downward from the surface 41 of the laminated head storage chamber 4 in the Z-axis direction, and is attached to the peak portion 55a of the bellows portion 51 at the movable portion 58a at the tip at the bottom in the Z-axis direction. . The sub guide portion 53b is attached to the movable portion 58a of the sub guide portion 53a at the movable portion 59b at the upper end portion in the Z axis direction, and extends toward the lower portion in the Z axis direction. The sub guide part 53b is attached to the peak part 55b of the bellows part 51 at the movable part 58b at the lower end in the Z-axis direction. The peak portion 55b is located below the peak portion 55a in the Z-axis direction. The sub guide portion 53c is attached to the movable portion 58b of the sub guide portion 53b at the movable portion 59c at the upper end portion in the Z-axis direction, and is attached to the surface 42 of the three-dimensional stacking chamber 2 at the lower end portion in the Z-axis direction.

  The movable parts 58a, 58b, 59b, 59c of the sub guide parts 53a, 53b, 53c can be deformed, respectively. Accordingly, the sub guide portions 53a, 53b, and 53c expand and contract as the bellows portion 51 expands and contracts. The guide portion 53 is not limited to this structure as long as it is provided on the outer periphery of the bellows portion 51 and expands and contracts with the expansion and contraction of the bellows portion 51. For example, when it is not necessary to protect the bellows part 51, the bellows 18 does not need to have the guide part 53. FIG.

  As described above, the openings 44 and 45 of the laminated head storage chamber 4 and the laminated head 12 are sealed with each other. In the bellows 18, the bellows portion 51 is provided along the outer periphery of the opening 43 of the surface 42 of the three-dimensional stacking chamber 2. Accordingly, the space 50 surrounded by the inner periphery of the bellows portion 51 and the surface 41 of the laminated head storage chamber 4 is connected to the three-dimensional laminated chamber 2 by the opening 43 of the three-dimensional laminated chamber 2 and together with the three-dimensional laminated chamber 2 It is sealed.

  The laminated head storage chamber 4 moves in the Z-axis direction by the Z-axis slide portion 4a, thereby moving the held laminated head 12, the shape measuring unit 30, and the heating head 31 in the Z-axis direction. Further, the stacked head storage chamber 4 is connected to the three-dimensional stacked chamber 2 via the bellows 18 so that the bellows 18 is expanded and contracted in the Z-axis direction as the Z-axis direction moves. At this time, the bellows 18 expands and contracts in the Z-axis direction while sealing the three-dimensional stacking chamber 2. Note that the stacking head storage chamber 4 may move the stacking head 12, the shape measuring unit 30, and the heating head 31 in the X-axis direction and the Y-axis direction.

  The bellows portion 51 is not limited to the shape described in the first embodiment as long as it can expand and contract along the Z-axis direction and can seal the inside of the three-dimensional stacking chamber 2. For example, the bellows portion 51 is obtained by connecting a plurality of cylindrical members having different diameters in the axial direction, and accommodating another cylindrical member having a smaller diameter in a cylindrical member having a larger diameter. For example, a cylindrical elastic member may be used.

  The machined part storage chamber 5 is provided on the upper surface of the three-dimensional stacking chamber 2 in the Z-axis direction. Further, the machining section storage chamber 5 is disposed adjacent to the laminated head storage chamber 4. The machining section storage chamber 5 is supported by the Z-axis slide section 5a so as to be movable in the Z-axis direction (the direction of the arrow 104) with respect to the three-dimensional stacking chamber 2. The machined portion storage chamber 5 is connected to the three-dimensional stacking chamber 2 by a bellows 19 on the lower surface in the Z-axis direction. The bellows 19 is connected to the lower surface of the machining unit storage chamber 5 in the Z-axis direction and the three-dimensional stacking chamber 2, and the lower surface of the machining unit storage chamber 5 in the Z-axis direction is part of the three-dimensional stacking chamber 2. And The three-dimensional stacking chamber 2 has an opening formed in a region surrounded by the bellows 19. A space surrounded by the Z-axis direction lower surface of the machined portion storage chamber 5 and the bellows 19 is connected to the three-dimensional stacking chamber 2 and sealed together with the three-dimensional stacking chamber 2. The machining unit storage chamber 5 supports the machining unit 13. Further, in the machining portion storage chamber 5, a part including the tool 22 of the machining portion 13 protrudes from the lower surface in the Z-axis direction toward the three-dimensional stacking chamber 2. Since the structure of the bellows 19 is the same as the structure of the bellows 18, the description is omitted.

  The machining section storage chamber 5 moves in the Z-axis direction by the Z-axis slide section 5a, thereby moving the held machining section 13 in the Z-axis direction. Further, the machined portion storage chamber 5 is connected to the three-dimensional stacking chamber 2 via the bellows 19 so that the bellows 19 is expanded and contracted in the Z-axis direction along with the movement in the Z-axis direction. At this time, the bellows 19 expands and contracts in the Z-axis direction while sealing the three-dimensional stacking chamber 2. The machining unit storage chamber 5 may move the machining unit 13 in the X-axis direction and the Y-axis direction.

  The bed 10 is provided at the bottom in the Z-axis direction in the three-dimensional stacking chamber 2. The bed 10 supports the table unit 11. The bed 10 is provided with various wirings, piping, and driving mechanisms.

  The table unit 11 is disposed on the upper surface of the bed 10 and supports the base unit 100. The table unit 11 includes a Y-axis slide unit 15, an X-axis slide unit 16, and a rotary table unit 17. The table part 11 attaches the base part 100 and moves the base part 100 on the bed 10.

  The Y-axis slide part 15 moves the X-axis slide part 16 with respect to the bed 10 along the Y-axis direction (the direction of the arrow 106). The X-axis slide unit 16 is fixed to a member that is an operation unit of the Y-axis slide unit 15, and the rotary table unit 17 is moved along the X-axis direction (the direction of the arrow 108) with respect to the Y-axis slide unit 15. Let The rotary table unit 17 is fixed to a member that is an operation unit of the X-axis slide unit 16 and supports the base unit 100. The rotary table unit 17 is, for example, an inclined circular table, and includes a fixed base 17a, a rotary table 17b, an inclined table 17c, and a rotary table 17d. The fixed base 17 a is fixed to a member that becomes an operating part of the X-axis slide part 16. The rotary table 17b is supported by the fixed base 17a, and rotates around the rotary shaft 110 parallel to the Z-axis direction. The tilt table 17c is supported by the rotary table 17b, and is rotated about the rotary shaft 112 orthogonal to the surface of the rotary table 17b. The rotary table 17d is supported by the tilt table 17c, and is rotated about a rotary shaft 114 orthogonal to the surface of the tilt table 17c that is supported. The rotary table 17d fixes the base unit 100. In this way, the rotary table unit 17 can rotate the base unit 100 around three orthogonal axes by rotating each unit around the rotation shafts 110, 112, and 114. The table unit 11 moves the base unit 100 fixed to the rotary table unit 17 in the Y-axis direction and the X-axis direction by the Y-axis slide unit 15 and the X-axis slide unit 16. Moreover, the table part 11 rotates the base part 100 around three orthogonal axes by rotating each part around the rotation axes 110, 112, and 114 by the rotary table part 17. The table unit 11 may further move the base unit 100 along the Z-axis direction.

  The laminating head 12 injects a powder material toward the base part 100, further melts the powder by irradiating the injected powder material with laser light, and solidifies the molten powder on the base part 100. A molding layer is formed. The powder introduced into the lamination head 12 is a powder of a material that is a raw material for a three-dimensional shape. In Embodiment 1, for example, a metal material such as iron, copper, aluminum, or titanium can be used as the powder. In addition, you may use materials other than metal materials, such as a ceramic, as a powder. The laminated head 12 is provided at a position facing the upper surface of the bed 10 in the Z-axis direction, and faces the table unit 11. The laminated head 12 is provided with a nozzle 23 at the bottom in the Z-axis direction. In the laminated head 12, the nozzle 23 is attached to the main body 66.

  FIG. 4 is a cross-sectional view showing an example of the nozzle 23 of the laminated head 12. As shown in FIG. 4, the nozzle 23 is a double tube having an outer tube 61 and an inner tube 62 inserted into the outer tube 61. The outer tube 61 is a tubular member, and has a diameter that decreases toward the tip (lower side in the Z-axis direction). The inner tube 62 is inserted into the outer tube 61. The inner tube 62 is also a tubular member and has a shape whose diameter decreases toward the tip (lower side in the Z-axis direction). The outer tube 61 constitutes a powder flow path 63 through which the powder material (powder) P passes between the inner periphery and the outer periphery of the inner tube 62. The inner tube 62 forms a laser path 64 through which laser light passes on the inner peripheral surface side. Here, the main body 66 to which the nozzle 23 is mounted is a double tube like the nozzle 23, and the powder flow path 63 and the laser path 64 are formed in the same manner. In the laminated head 12, a powder flow path 63 is arranged so as to surround the laser path 64. In the first embodiment, the powder flow path 63 is a powder injection unit that injects powder. In the stacking head 12, the powder P introduced from the powder introduction part 35 flows through the powder flow path 63 and is ejected from a powder ejection port part 65 a which is an opening at the tip between the outer pipe 61 and the inner pipe 62.

  In the first embodiment, the laser path 64 is a light irradiation unit. The laminated head 12 includes a light source 67, an optical fiber 68, and a condensing unit 69 in the laser path 64. The light source 67 outputs laser light. The optical fiber 68 guides the laser output from the light source 67 to the laser path 64. The condensing unit 69 is disposed in the laser path 64 and is disposed in the optical path of the laser output from the optical fiber 68. The condensing unit 69 condenses the laser light L output from the optical fiber 68. The laser beam L condensed by the condensing unit 69 is output from a laser irradiation port 65 b that is an opening at the tip of the inner tube 62. In the laminated head 12, the light collecting unit 69 is arranged in the main body 66, but a part or all of the light collecting unit 69 may be arranged in the nozzle 23. When a part or all of the light condensing unit 69 is arranged in the nozzle 23, the focal position can be set to a different position by exchanging the nozzle 23.

  The stacking head 12 ejects the powder P from the powder flow path 63 and outputs the laser light L from the laser path 64. The powder P ejected from the lamination head 12 enters the region irradiated with the laser beam L output from the lamination head 12 and is heated by the laser beam L. After the powder P irradiated with the laser beam L is melted, it reaches the base 100. The powder P that has reached the base 100 in a molten state is cooled and solidified. Thereby, a molding layer is formed on the base part 100.

  Here, the laminated head 12 according to the first embodiment may not include an optical fiber that guides the laser light L output from the light source 67 through the optical fiber 68. Further, the condensing unit 69 may be provided on the main body 66, the nozzle 23, or both. Since the laminated head 12 of the first embodiment can be processed effectively, the powder flow path 63 for injecting the powder P and the laser path 64 for irradiating the laser light L are provided coaxially, but the present invention is not limited to this. The stacking head 12 may have a mechanism for spraying the powder P and a mechanism for irradiating the laser beam L as separate bodies. The laminated head 12 according to the first embodiment irradiates the powder material with the laser light L, but may irradiate a light beam other than the laser light as long as the powder material can be dissolved or sintered.

  The machining unit 13 performs machining of a molded layer or the like, for example. As shown in FIG. 1, the machining portion 13 is provided at a position facing the upper surface of the bed 10 in the Z-axis direction, and faces the table portion 11. The machined portion 13 is provided with a tool 22 at the lower end in the Z-axis direction. In addition, the machining part 13 should just be provided in the Z-axis direction upper side from the bed 10 in the movable range of the base part 100 by the table part 11, and an arrangement position is not restricted to the position of Embodiment 1. .

  FIG. 5 is a schematic diagram illustrating the configuration of the control device 20. The control device 20 is electrically connected to each part of the three-dimensional laminating apparatus 1 and controls the operation of each part of the three-dimensional laminating apparatus 1. The control device 20 is installed outside the three-dimensional stacking chamber 2 and the spare chamber 3. As illustrated in FIG. 5, the control device 20 includes an input unit 71, a control unit 72, a storage unit 73, an output unit 74, and a communication unit 75. Each part of the input part 71, the control part 72, the memory | storage part 73, the output part 74, and the communication part 75 is electrically connected.

  The input unit 71 is, for example, an operation panel. The worker inputs information, commands, and the like to the input unit 71. The control unit 72 is, for example, a CPU (Central Processing Unit) and a memory. The control unit 72 outputs a command for controlling the operation of each part of the three-dimensional laminating apparatus 1 to each part of the three-dimensional laminating apparatus 1. In addition, information from each unit of the three-dimensional laminating apparatus 1 is input to the control unit 72. The storage unit 73 is, for example, a storage device such as a RAM (Random Access Memory) or a ROM (Read Only Memory). The storage unit 73 stores an operation program of the three-dimensional laminating apparatus 1 that controls the operation of each unit by being executed by the control unit 72, information on the three-dimensional laminating apparatus 1, design information of a three-dimensional shape object, and the like. Is done. The output unit 74 is a display, for example. The output unit 74 displays, for example, information from each unit of the three-dimensional laminating apparatus 1. The communication unit 75 communicates with a communication line such as the Internet or a LAN (Local Area Network) and exchanges information with the communication line. In addition, the control apparatus 20 should just have the control part 72 and the memory | storage part 73 at least. If the control device 20 includes the control unit 72 and the storage unit 73, it can output a command to each unit of the three-dimensional stacking device 1.

  The shape measuring unit 30 is fixed to the laminated head storage chamber 4. The shape measuring unit 30 is disposed adjacent to the laminated head 12. The shape measuring unit 30 measures the surface shape of the molding layer formed on the base unit 100. As the shape measuring unit 30, for example, a 3D scanner or a device that measures a relative distance can be used. For example, the shape measuring unit 30 scans (scans) a laser beam on the surface of the molding layer on the base unit 100, and calculates position information on the surface of the molding layer from the reflected light, thereby determining the surface shape of the molding layer. measure. Further, in the first embodiment, the shape measuring unit 30 is attached to the stacked head storage chamber 4, but it is only necessary to measure the surface shape of the molding layer formed on the base unit 100 and is attached to another position. May be.

  The heating head 31 heats the molding layer on the base 100 or the molten powder P. The heating head 31 is fixed to the laminated head storage chamber 4. The heating head 31 is disposed adjacent to the laminated head 12. The heating head 31 irradiates laser light, infrared light, or electromagnetic waves, for example, and heats the molding layer or the melted powder P. By heating the molding layer or the melted powder P with the heating head 31, the temperature of the molding layer or the melted powder P can be controlled. Thereby, the rapid temperature fall of the shaping | molding layer or the fuse | melted powder P can be suppressed, or the atmosphere (high temperature environment) where the powder P is easy to fuse | melt can be formed. The heating head 31 may further include, for example, a temperature sensor that measures the temperature of the surface of the molding layer, and may control heating based on the measurement result of the temperature sensor.

  The machining unit measurement unit 32 measures the position of the tip of the tool 22 of the machining unit 13. The machining unit measurement unit 32 measures the position of the tip of the tool 22 of the machining unit 13 by imaging. Therefore, the machining unit measurement unit 32 can measure the position of the tip of the tool 22 while operating the machining unit 13. However, the machining unit measurement unit 32 is not limited to the one based on imaging, and may measure the tip position of the tool 22 of the machining unit 13 with a laser beam, for example.

  The tool changer 33 is disposed inside the three-dimensional stacking chamber 2. The tool exchange unit 33 exchanges the tool 22 attached to the machining unit 13. The tool changer 33 moves a portion that does not hold the tool 22 to a position facing the machining unit 13. Thereafter, the tool changer 33 moves the tool 22 to a position where the tool 22 is not gripped at a position facing the machining unit 13. Then, the process which removes the tool 22 with which the machining part 13 was mounted | worn is performed. Thereafter, the part holding another tool 22 to be mounted on the machining unit 13 is moved to a position facing the machining unit 13, and the other tool 22 is attached to the machining unit 13. Thus, the tool changer 33 can replace the tool 22 of the machining unit 13 by attaching and detaching the tool 22 of the machining unit 13. The tool changing unit 33 is not limited to this configuration as long as the tool 22 of the machining unit 13 can be changed.

  The nozzle replacement unit 34 is disposed inside the three-dimensional stacking chamber 2. The nozzle replacement unit 34 replaces the nozzles 23 attached to the stacking head 12. The nozzle changer 34 can use the same structure as the tool changer 33.

  The powder introduction unit 35 introduces a powder material, which is a raw material for the three-dimensional shape, into the lamination head 12. 6A and 6B are schematic views showing examples of the powder introduction part, respectively. As shown in FIG. 6A, in Embodiment 1, the powder is managed in a state of being enclosed in a cartridge 83. That is, the powder is shipped in a cartridge 83 for each type of material, for example. The cartridge 83 is provided with a material display portion 84. The material display part 84 is a display which shows the information of powder, such as the kind of material, for example. The material display unit 84 is not limited to information that can be visually confirmed, and may be a display such as an IC chip, a two-dimensional code, or a mark that can acquire information by reading with a reader. The material display part 84 will not be restricted to these, if the kind of powder material can be shown. In addition to the type of powder material, the material display unit 84 can show information on powder necessary for manufacturing a three-dimensional shape such as powder particle size, weight, purity, or oxide film. Moreover, the material display part 84 may contain the information which shows whether powder is a regular product.

  The powder introduction unit 35 includes a powder storage unit 81 and a powder identification unit 82. The powder storage unit 81 is a box-shaped member, for example, and stores the cartridge 83 therein. The powder storage unit 81 is connected to a conveyance air supply unit for carrying out the powder and a conveyance path for conveying the powder to the lamination head 12. When the cartridge 83 is stored, the powder storage unit 81 introduces the powder stored in the cartridge 83 to the stacking head 12. When the powder identification unit 82 detects that the cartridge 83 is stored in the powder storage unit 81, the powder identification unit 82 reads the material display unit 84 of the cartridge 83 and reads information on the powder stored in the cartridge 83. The powder introduction unit 35 can supply known powder to the stacking head 12 by acquiring powder information by the powder identification unit 82.

  Here, the powder introduction unit 35 may supply powder that is not managed in a state of being enclosed in the cartridge 83 to the stacking head 12. FIG. 6B shows the powder introduction portion 35A when the powder is not enclosed in the cartridge. The powder introduction unit 35A includes a powder storage unit 81A, a powder identification unit 82A, and a powder guide tube 89 that connects the powder storage unit 81A and the powder identification unit 82A. The powder storage unit 81A is, for example, a box-shaped member, and stores the powder P therein. The powder identification unit 82A analyzes the powder supplied via the powder guide tube 89, and the powder necessary for manufacturing the three-dimensional shape product such as the type, particle size, weight, purity, or oxide coating of the powder. Measure information. As the powder identification unit 82, a spectroscopic analysis device that identifies a powder material by spectroscopic analysis, a particle size analysis device that measures the particle size of powder by particle size analysis, a weigh scale that measures the weight of powder, or the like can be used. The powder identification unit 82A measures the purity of the powder from, for example, the type, particle size, and weight of the measured powder material. Moreover, the powder identification part 82A measures the powder oxide film by, for example, conductivity. The powder introduction unit 35 </ b> A can also supply known powder to the stacking head 12 by acquiring powder information by the powder identification unit 82 </ b> A.

  The base moving unit 36 is disposed in the preliminary chamber 3. The base moving unit 36 moves the base unit 100 a from the preliminary chamber 3 into the three-dimensional stacked chamber 2, and moves the base unit 100 in the three-dimensional stacked chamber 2 into the preliminary chamber 3. The base moving part 36 is attached with a base part 100a carried into the spare chamber 3 from the outside. The base moving part 36 carries the attached base part 100a from the preliminary chamber 3 into the three-dimensional stacking chamber 2. More specifically, the base moving part 36 moves the base part 100 a attached to the base moving part 36 into the three-dimensional stacking chamber 2 and attaches it to the rotary table part 17. The base moving unit 36 moves the base unit 100 using, for example, a robot arm or an orthogonal axis transfer device.

  The gas discharge part 37 is a vacuum pump, for example, and discharges the air in the three-dimensional stacking chamber 2. The gas introduction unit 38 introduces a predetermined component gas, for example, an inert gas such as argon or nitrogen, into the three-dimensional stacking chamber 2. The three-dimensional stacking apparatus 1 discharges air from the three-dimensional stacking chamber 2 through a gas discharge unit 37 and introduces a predetermined component gas, for example, an inert gas such as argon or nitrogen, into the three-dimensional stacking chamber 2 through a gas introduction unit 38. To do. Thereby, the three-dimensional laminating apparatus 1 can make the inside of the three-dimensional laminating chamber 2 a desired gas atmosphere. Here, in Embodiment 1, the gas introduction part 38 is provided below the gas discharge part 37 in the Z-axis direction. When the three-dimensional laminating apparatus 1 is used as a gas for introducing argon or the like having a higher specific gravity than a gas such as oxygen in the air by providing the gas introduction unit 38 below the gas discharge unit 37 in the Z-axis direction, Argon gas can be suitably filled in the three-dimensional stacking chamber 2. In addition, what is necessary is just to reverse arrangement | positioning of piping, when making the gas introduced into a gas lighter than air. Moreover, the gas discharge part 37 may discharge | emit gases other than the air in the three-dimensional lamination | stacking chamber 2. FIG.

  The powder recovery unit 39 recovers the powder P that has been ejected from the powder ejection port 65a of the stacking head 12 and that has not formed the molding layer. The powder recovery unit 39 sucks the gas in the three-dimensional stacking chamber 2 and recovers the powder P contained in the gas. The powder P sprayed from the lamination head 12 is melted and solidified by the laser light L to form a molding layer. However, a part of the powder P may remain in the three-dimensional stacking chamber 2 as it is, for example, when the laser beam L is not irradiated. Further, the chips cut by the machining unit 13 and discharged from the molding layer remain in the three-dimensional stacking chamber 2. The powder recovery unit 39 recovers the powder P and chips remaining in the three-dimensional stacking chamber 2. The powder recovery unit 39 may include a mechanism for mechanically recovering powder such as a brush.

  FIG. 7 is a schematic diagram illustrating an example of the powder recovery unit 39. As shown in FIG. 7, the powder recovery unit 39 includes an introduction unit 85, a cyclone unit 86, a gas discharge unit 87, and a powder discharge unit 88. The introduction portion 85 is, for example, a tubular member, and one end portion is connected to, for example, the three-dimensional stacking chamber 2. The cyclone portion 86 is, for example, a hollow frustoconical member, and its diameter decreases, for example, downward in the vertical direction. The other end of the introduction part 85 is connected to the cyclone part 86 along the tangential direction of the outer periphery of the cyclone part 86. The gas discharge part 87 is a tubular member, and one end part is connected to the upper end part of the cyclone part 86 in the vertical direction. The powder discharge portion 88 is a tubular member, and one end portion is connected to the end portion of the cyclone portion 86 on the lower side in the vertical direction.

  For example, a pump for sucking gas is connected to the other end of the gas discharge portion 87. Therefore, the gas discharge part 87 draws gas from the cyclone part 86, and makes the cyclone part 86 into a negative pressure. Since the cyclone portion 86 has a negative pressure, the introduction portion 85 sucks gas from the three-dimensional stacking chamber 2. The introduction part 85 sucks the powder P that has not formed the molding layer together with the gas in the three-dimensional stacking chamber 2. The introduction part 85 is connected to the cyclone part 86 along the tangential direction of the outer periphery of the cyclone part 86. Accordingly, the gas and the powder P sucked into the introduction part 85 swirl along the inner periphery of the cyclone part 86. Since the specific gravity of the powder P is higher than that of the gas, the powder P is centrifuged outward in the radial direction of the inner periphery of the cyclone portion 86. The powder P is discharged from the powder discharge unit 88 toward the powder discharge unit 88 below the stretching direction by its own weight. Further, the gas is discharged by the gas discharge unit 87.

  The powder recovery unit 39 recovers the powder P that has not formed the molding layer in this way. Moreover, the powder collection | recovery part 39 in Embodiment 1 may collect | recover and collect the powder P for every specific gravity. For example, a powder having a low specific gravity is sucked into the gas discharge unit 87 without going to the powder discharge unit 88 because its own weight is small. Therefore, the powder recovery unit 39 can separate and recover the powder P for each specific gravity. In addition, the powder collection | recovery part 39 will not be restricted to such a structure, if the powder P which did not form a shaping | molding layer can be collect | recovered.

  Next, the manufacturing method of the three-dimensional shape object by the three-dimensional laminating apparatus 1 is demonstrated. FIG. 8 is a schematic diagram illustrating a method for manufacturing a three-dimensional shape by the three-dimensional laminating apparatus 1 according to the first embodiment. Further, the manufacturing method shown in FIG. 8 can be executed by the control device 20 controlling the operation of each part. Embodiment 1 demonstrates as a case where a three-dimensional shape thing is manufactured on the base 91. FIG. The pedestal 91 is, for example, a metal plate-like member, but the shape and material are arbitrary as long as a three-dimensional shape is manufactured on the top. The pedestal 91 is attached on the base part 100. The base unit 100 is fixed to the rotary table unit 17 of the table unit 11 together with the base 91. The pedestal 91 can also be used as the base part 100.

  As shown in step S <b> 1, the control device 20 causes the table unit 11 to move the base unit 100 so that the pedestal 91 on the base unit 100 is disposed below the stacking head 12 in the Z-axis direction.

  Next, as shown in step S <b> 2, the control device 20 introduces powder from the powder introduction unit 35 to the stacking head 12, and irradiates the laser beam L while injecting the powder P together with gas from the stacking head 12. The powder P is sprayed toward the base 91 on the base 100 with a predetermined convergence diameter. The laser beam L is applied to the powder P with a predetermined spot diameter between the laminated head 12 and the pedestal 91. Here, the spot diameter in the Z-axis direction of the spot diameter of the laser beam L with respect to the position in the Z-axis direction of the convergence diameter of the powder P and the spot diameter at the position in the Z-axis direction of the convergence diameter of the powder P are, for example, condensing It can be controlled by moving the position of the portion 49.

  The control device 20 sprays the powder P while irradiating the laser beam L from the laminated head 12, so that the powder P is melted by the irradiation of the laser beam L as shown in step S <b> 3. The melted powder P falls as a melt A downward toward the pedestal 91 on the base part 100 in the Z-axis direction.

  The melt A that has dropped downward in the Z-axis direction reaches a predetermined position of the base 91 on the base portion 100. The melt A on the pedestal 91 is cooled, for example, by being allowed to cool at a predetermined position on the pedestal 91. The cooled melt A is solidified as a solidified body B on the pedestal 91 as shown in step S4.

  The control device 20 forms the solidified body B on the base unit 100 by the stacking head 12 according to the procedure shown in steps S2 to S4 while moving the base unit 100 to a predetermined position by the table unit 11. By repeating these procedures, the solidified body B forms a molding layer 92 having a predetermined shape on the pedestal 91 as shown in step S5.

  As shown in step S <b> 6, the control device 20 moves the base 91 of the base portion 100 by the table portion 11 so that the molding layer 92 formed on the base 91 is disposed below the machining portion 13 in the Z-axis direction. Move. Further, the control device 20 performs machining on the molded layer 92 by the machining unit 13. The control device 20 selects whether or not the machining by the machining unit 13 is performed, and may not be performed if unnecessary. Therefore, the machining shown in step S6 may not be performed depending on the command of the control device 20.

  Next, as shown in step S <b> 7, the control device 20 causes the table portion 11 to place the pedestal of the base portion 100 so that the molding layer 92 formed on the pedestal 91 is disposed below the laminated head 12 in the Z-axis direction. 91 is moved. And the procedure shown to step S2 to step S6 is repeated, the shaping | molding layer 93 is laminated | stacked sequentially on the shaping | molding layer 92, and a three-dimensional shape thing is manufactured.

  In summary, the three-dimensional stacking apparatus 1 according to the first embodiment manufactures a three-dimensional object as follows. The powder injection unit 63 of the laminated head 12 injects the powder P toward the pedestal 91 on the base unit 100. Further, the powder flow path 63 of the lamination head 12 irradiates the powder P with the laser light L between the lamination head 12 and the pedestal 91. The powder P irradiated with the laser light L is melted and solidified on a pedestal 91 on the base part 100 to form a molding layer 92. The three-dimensional laminating apparatus 1 sequentially laminates the molding layer 93 on the molding layer 92, and applies appropriate machining to the molding layers 92, 93 by the machining unit 13 to produce a three-dimensional shape product.

  In the first embodiment, the three-dimensional shape is manufactured on the pedestal 91, but the three-dimensional shape may not be manufactured on the pedestal 91. The three-dimensional shape may be manufactured directly on the base 100, for example. Moreover, the three-dimensional laminating apparatus 1 may perform what is called build-up welding by laminating a molding layer on an existing modeled object.

  Next, a detailed process of manufacturing a three-dimensional object by the three-dimensional laminating apparatus 1 according to the first embodiment will be described. FIG. 9 is a flowchart illustrating a manufacturing process of a three-dimensional shape by the three-dimensional stacking apparatus 1 according to the first embodiment. For example, the control device 20 reads design information of a three-dimensional shape object stored in the storage unit 73.

  Next, the control apparatus 20 discharges the air in the three-dimensional stacking chamber 2 by the gas discharge part 37 (step S11). Here, the three-dimensional stacking chamber 2 has a door 6 closed and is separated from the preliminary chamber 3. Further, the three-dimensional stacking chamber 2 is also closed and sealed at a portion communicating with other outside air. For example, the control device 20 discharges air by the gas discharge unit 37 so that the oxygen concentration in the three-dimensional stacked chamber 2 is 100 ppm or less, preferably 10 ppm or less. The control device 20 can be in an inactive state when the oxygen concentration in the three-dimensional stacking chamber 2 is 100 ppm or less, and can be more reliably in an inactive state by being 10 ppm or less.

  Next, the base part 100 having the base 91 is attached to the base moving part 36 in the preliminary chamber 3 (step S12). Note that the three-dimensional laminating apparatus 1 may perform the process of step S12 prior to the process of step S11.

  When the base moving part 36 in the spare room 3 is attached, the control device 20 closes the door 7 of the spare room 3, and discharges the air in the spare room 3 by the spare room gas discharge part 25 (step S13). . The control device 20 reduces the oxygen concentration in the preliminary chamber 3 by discharging air from the preliminary chamber gas discharge unit 25. The oxygen concentration in the preliminary chamber 3 is preferably the same as that in the three-dimensional stacked chamber 2, for example.

  When the discharge of the air in the preliminary chamber 3 is completed, the control device 20 opens the door 6 of the three-dimensional stacking chamber 2, and the base moving unit 36 moves the base unit 100 to the rotary table unit 17 in the three-dimensional stacking chamber 2. Attach (step S14). The base unit 100 is fixed to the rotary table unit 17. When the base unit 100 is attached to the turntable unit 17, the control device 20 returns the base moving unit 36 into the spare chamber 3 and closes the door 6.

  If the control apparatus 20 sets the base part 100 to the turntable part 17, gas will be introduce | transduced in the three-dimensional lamination | stacking chamber 2 by the gas introduction part 38 (step S15). The control device 20 brings the inside of the three-dimensional stacked chamber 2 into the introduced gas atmosphere by the gas introduction unit 38. In the first embodiment, the gas introduced by the gas introduction unit 38 is an inert gas such as nitrogen or argon. The gas introduction unit 38 introduces an inert gas so that the residual oxygen concentration in the three-dimensional stacking chamber 2 is 100 ppm or less.

  Moreover, the three-dimensional laminating apparatus 1 may omit step S11, step S13, and step S15 depending on the type of powder material. For example, when the quality of the three-dimensional shape does not become a problem even when the powder material is oxidized, these steps may be omitted, and the three-dimensional stacking chamber 2 and the preparatory chamber 3 may be set to an air atmosphere. Moreover, step S13 and step S15 may be performed continuously also after step S16. That is, the gas discharge unit 37 may appropriately discharge air from the three-dimensional stacking chamber 2 while manufacturing the three-dimensional shape object. In addition, the gas introduction unit 38 may appropriately introduce an inert gas into the three-dimensional stacking chamber 2 while manufacturing the three-dimensional object.

  When the introduction of the inert gas into the three-dimensional stacking chamber 2 is completed, the control device 20 determines whether to machine the pedestal 91 on the base unit 100 (step S16). For example, the control device 20 causes the shape measuring unit 30 to measure the surface shape of the pedestal 91. The control device 20 determines whether to machine the pedestal 91 based on the measurement result of the shape measuring unit 30. For example, when the surface roughness of the pedestal 91 is larger than a predetermined value, the control device 20 determines to machine the pedestal 91. However, the necessity determination of the machining of the pedestal 91 by the control device 20 is not limited to this, and may not be based on the measurement result of the shape measuring unit 30. For example, the control device 20 may store information on the pedestal 91 in the storage unit 73, and determine whether the processing of the pedestal 91 is necessary from the information on the pedestal 91 and the design information of the three-dimensional shape object. Moreover, the control apparatus 20 is good also as the setting which always processes the base 91. FIG.

  When the control device 20 determines that the machining of the pedestal 91 is necessary (Yes in step S16), the machining unit 13 performs machining of the pedestal 91 under predetermined conditions (step S17). The control device 20 determines the machining conditions of the pedestal 91 based on, for example, the shape measurement result of the pedestal 91 by the shape measuring unit 30 or the information on the pedestal 91 and the design information of the three-dimensional shape.

  When the control device 20 determines that machining of the pedestal 91 is not necessary (No in step S16), or when machining the pedestal 91 under a predetermined condition, for example, a three-dimensional shape object read from the storage unit 73 Based on the design information, the formation condition of the molding layer is determined (step S18). The forming conditions of the forming layer include, for example, the shape of each layer of the forming layer, the type of powder P, the spraying speed of the powder P, the spraying pressure of the powder P, the irradiation condition of the laser light L, the convergent diameter of the powder P and the laser light L. The positional relationship between the spot diameter and the surface of the molding layer, the size of the powder P melted in the air, the temperature, the size of the molten pool formed on the surface of the molding layer being formed, the cooling rate, or the base portion by the table portion 11 These are necessary conditions for forming the molding layer, such as a moving speed of 100.

  After determining the forming conditions of the molding layer, the control device 20 sprays the powder P toward the pedestal 91 on the base portion 100 by the lamination head 12, and starts the irradiation with the laser light L (step S19). The control device 20 can melt the powder P with the laser light L by irradiating the laser light L while injecting the powder P, and solidify the melted powder P. Form.

  The control apparatus 20 irradiates the laser beam L while injecting the powder P, and moves the base part 100 by the table part 11, thereby forming the molding layer 92 on the pedestal 91 (step S20). The control device 20 may heat the molding layer 92 with the heating head 31 or heat a portion before the solidified body B adheres.

  After forming the molding layer 92, the control device 20 determines whether the molding layer 92 needs to be machined (step S21). For example, the control device 20 causes the shape measuring unit 30 to measure the surface shape of the molding layer 92. The control device 20 determines whether machining of the molding layer 92 is necessary based on the measurement result of the shape measuring unit 30. For example, the control device 20 determines that the molding layer 92 is to be machined when the surface roughness of the molding layer 92 is larger than a predetermined value. However, the criteria for determining whether machining of the molded layer 92 is necessary are not limited to this. For example, the control device 20 may determine whether or not the molding layer 92 needs to be machined based on the design information of the three-dimensional shape and the formation conditions of the molding layer. For example, when the surface roughness of the molding layer 92 calculated from the molding layer forming conditions is larger than the necessary surface roughness based on the design information of the three-dimensional shape, the control device 20 needs to machine the molding layer 92. You may make it judge that it is.

  When the control device 20 determines that machining of the molded layer 92 is not necessary (No in step S21), the control device 20 proceeds to step S24. When determining that the molding layer 92 needs to be machined (Yes in step S21), the control device 20 determines machining conditions for the molding layer 92 (step S22). For example, the control device 20 determines the processing condition based on the measurement result of the shape measuring unit 30, or the design information of the three-dimensional shape object, the forming layer forming condition, and the like. After determining the molding layer processing conditions, the control device 20 causes the machining unit 13 to machine the molding layer 92 based on the determined processing conditions (step S23).

  When the control device 20 performs machining of the molding layer 92 or determines that the machining of the molding layer 92 is not necessary, is it necessary to further stack the molding layer 93 on the molding layer 92? Is determined (step S24). The control device 20 determines, for example, whether it is necessary to further laminate the molding layer 93 on the molding layer 92 based on the design information of the three-dimensional shape read from the storage unit 73.

  When determining that the molding layer 93 needs to be stacked (Yes in Step S24), the control device 20 returns to Step S18 and stacks the molding layer 93 on the molding layer 92. When the control device 20 determines that the formation of the molding layer 93 is unnecessary (No in step S24), the manufacture of the three-dimensional shape is completed.

  When the gas concentration of, for example, oxygen or nitrogen is high in the three-dimensional stacking chamber 2, the powder P may cause alteration such as oxidation or nitridation. However, in the first embodiment, the gas discharge unit 37 discharges the air in the three-dimensional stacking chamber 2, and the gas introduction unit 38 introduces an inert gas into the three-dimensional stacking chamber 2. Therefore, the three-dimensional laminating apparatus 1 according to the first embodiment can suppress the deterioration of the powder P and suppress the deterioration of the quality of the three-dimensional shape. Furthermore, the gas introduction unit 38 can introduce an arbitrary gas. Therefore, the three-dimensional laminating apparatus 1 according to the first embodiment can manufacture a three-dimensional shape object in an optimal gas atmosphere, for example, depending on the type of powder.

  In the three-dimensional laminating apparatus 1 according to the first embodiment, the molding layer is formed by the laminating head 12. Therefore, in the first embodiment, the nozzle 23 including the powder injection port portion 65 a and the laser irradiation port portion 65 b of the stacking head 12 is disposed in the three-dimensional stacking chamber 2. Here, the lamination head 12 is a machine that moves in the Z-axis direction. The three-dimensional laminating apparatus 1 according to the first embodiment includes a bellows 18 that seals the inside of the three-dimensional laminating chamber 2 while expanding and contracting as the laminating head 12 moves. Therefore, the three-dimensional laminating apparatus 1 suppresses a decrease in airtightness in the three-dimensional laminating chamber 2 even when a movable machine such as the laminating head 12 is accommodated in the three-dimensional laminating chamber 2, and the quality of the three-dimensional shaped object Can be suppressed. Furthermore, the three-dimensional laminating apparatus 10 may be configured such that the bellows 18 can be expanded and contracted in the uniaxial direction by using a mechanism that moves the laminating head 12 only in the uniaxial direction as in this embodiment. Thereby, it can be expanded and contracted following the movement while reducing the load on the bellows 18, and the inside of the three-dimensional stacking chamber 2 can be sealed more suitably. Thereby, compared with the case where it is set as the structure which moves the lamination | stacking head 12 to a multi-axis direction, an apparatus structure can be made small and it can make it easier to maintain sealing performance. Further, the bellows 18 can arrange only the nozzle 23 of the lamination head 12 in the three-dimensional lamination chamber 2. Therefore, the three-dimensional laminating apparatus 1 can reduce the volume of the three-dimensional laminating chamber 2 as compared to arranging all the laminating heads 12 in the three-dimensional laminating chamber 2. Therefore, the three-dimensional stacking apparatus 1 can easily discharge the gas in the three-dimensional stacking chamber 2 and introduce a predetermined gas. The relationship between the bellows 19 and the machined portion 13 is the same.

  Furthermore, the three-dimensional laminating apparatus 1 has a preliminary chamber 3. The preliminary chamber 3 suppresses the direct connection between the three-dimensional stacked chamber 2 and the outside. Therefore, when the base part 100 is taken in and out of, for example, the three-dimensional stacking chamber 2, the spare chamber 3 flows into the three-dimensional stacking chamber 2 from the outside, or the inert gas in the three-dimensional stacking chamber 2. Can be prevented from flowing out to the outside. Therefore, the three-dimensional stacking apparatus 1 can shorten the time for exhausting the gas in the three-dimensional stacking chamber 2 or introducing a predetermined gas into the three-dimensional stacking chamber 2. In addition, the base moving unit 36 moves the base unit 100 into the three-dimensional stacking chamber 2. In the three-dimensional stacking chamber 2, the internal air may be discharged. The base moving unit 36 can move the base unit 100 to the inside of the three-dimensional stacking chamber 2 without, for example, an operator entering the three-dimensional stacking chamber 2.

(Embodiment 2)
Next, Embodiment 2 of the present invention will be described with reference to the drawings. The three-dimensional laminating apparatus 1A according to the second embodiment is different from the three-dimensional laminating apparatus 1 according to the first embodiment in that the laminating head 12 includes a cover portion 120. Since the three-dimensional laminating apparatus 1A according to the second embodiment has the same configuration as that of the three-dimensional laminating apparatus 1 according to the first embodiment in other points, the description of overlapping parts is omitted.

  FIG. 10 is a cross-sectional view illustrating an example of the cover unit 120 according to the second embodiment. The cover part 120 is a box-shaped member that forms a space 121 therein. The cover part 120 covers the place where the three-dimensional shape object of the base part 100 is manufactured. The cover part 120 adjusts the gas atmosphere around the powder P ejected from the laminated head 12 by the cover part gas discharge part 122 and the cover part gas introduction part 124 connected to the cover part 120.

  As shown in FIG. 10, the cover part 120 includes an attachment part 132, a wall part 134, a gas discharge opening part 136, a gas introduction opening part 138, and an opening part 140.

  The attachment portion 132 is a plate-like member to which the laminated head 12 is attached, and has an opening 133. The wall part 134 is provided along the circumferential direction of the attachment part 132. The wall portion 134 extends from the outer periphery of the attachment portion 132 to the end portion 135 in a direction intersecting the surface of the attachment portion 132. The wall portion 134 forms an opening 140 on the inner periphery of the end portion 135. A portion surrounded by the attachment portion 132 and the wall portion 134 forms a space 121.

  The gas discharge opening 136 is provided in the wall portion 134 and allows the space 121 and the outside of the cover portion 120 to conduct. The gas introduction opening 138 is provided in the wall portion 134, and conducts the space 121 and the outside of the cover portion 120. The gas discharge opening 136 is provided closer to the mounting portion 132 than the gas introduction opening 138. However, the gas discharge opening 136 and the gas introduction opening 138 are not limited to these positions as long as the space 121 and the outside of the cover 120 are electrically connected. The gas discharge opening 136 may be provided closer to the opening 140 than the gas introduction opening 138. Further, the gas discharge opening 136 and the gas introduction opening 138 may be provided in the mounting portion 132, for example.

  The gas discharge opening 136 is connected to the cover gas discharge unit 122 via the discharge pipe 142. The cover part gas discharge part 122 is, for example, a vacuum pump. The cover part gas discharge part 122 is controlled by the control device 20 and discharges the air in the space 121 of the cover part 120. The cover part gas discharge part 122 is controlled by the control device 20. The cover part gas discharge part 122 is provided outside the three-dimensional stacking chamber 2, but may be provided in the three-dimensional stacking chamber 2, for example. Further, the cover part gas discharge part 122 may discharge a gas other than the air in the space 121 of the cover part 120.

  The gas introduction opening 138 is connected to the cover part gas introduction part 124 via the introduction pipe 144. The cover part gas introduction part 124 is controlled by the control device 20 and introduces a predetermined component gas, for example, an inert gas such as argon or nitrogen into the space 121 of the cover part 120. In the second embodiment, the same gas as the gas introduced into the three-dimensional stacking chamber 2 is introduced into the cover portion gas introduction portion 124. The cover part gas introduction part 124 is provided outside the three-dimensional stacking chamber 2, but may be provided in the three-dimensional stacking chamber 2, for example. Note that a gas different from the gas introduced into the three-dimensional stacking chamber 2 may be introduced into the space 121 of the cover part 120.

  The cover part 120 is attached to the laminated head 12. More specifically, the cover portion 120 is attached to the laminated head 12 so that the nozzle 23 of the laminated head 12 is accommodated in the space 121 through the opening 133 of the attachment portion 132. The laminated head 12 and the opening 133 of the attachment portion 132 are sealed from each other. The cover part 120 is attached to the laminated head 12 to open the opening part 140 toward the lower part in the Z-axis direction. Next, a method for adjusting the gas atmosphere around the powder P using the cover 120 will be described.

  FIG. 11 is a flowchart illustrating a process of adjusting the gas atmosphere around the powder P by the cover unit 120 according to the second embodiment. The control device 20 discharges air in the three-dimensional stacking chamber 2 and introduces an inert gas into the three-dimensional stacking chamber 2. Next, the control apparatus 20 moves the base part 100 by the table part 11 so that the cover part 120 may cover the base 91 on the base part 100 (step S31). The end part 135 of the cover part 120 is located above the base part 100 in the Z-axis direction. Since the cover part 120 moves together with the laminated head 12, the control device 20 forms a space 137 without bringing the end part 135 of the cover part 120 and the base part 100 into contact with each other. In addition, the cover part 120 does not need to cover the whole base 91, if the location where the three-dimensional shape object of the base part 100 is manufactured is covered. For example, the cover unit 120 may cover only the upper surface of the base 91 in the Z-axis direction. In step S <b> 31, the control device 20 may move the stacking head 12 in the Z-axis direction so that the cover unit 120 covers the base 91 on the base unit 100.

  When the control device 20 moves the base portion 100 so that the cover portion 120 covers the base 91, the control device 20 discharges the air in the space 121 in the cover portion 120 by the cover portion gas discharge portion 122 ( Step S32). For example, the control device 20 discharges air by the cover portion gas discharge portion 122 so that the oxygen concentration in the cover portion 120 is 100 ppm or less, preferably 10 ppm or less. The control device 20 can be inactivated by setting the oxygen concentration in the cover 120 to 100 ppm or less, and can be more reliably inactivated by setting it to 10 ppm or less.

  If the control apparatus 20 discharges the air in the space 121 of the cover part 120, the control apparatus 20 will introduce an inert gas into the space 121 in the cover part 120 by the cover part gas introduction part 124 (step S33). . The control device 20 makes the introduced inert gas atmosphere in the space 121 in the cover part 120 by the cover part gas introduction part 124. In the second embodiment, the gas introduced by the cover part gas introduction part 124 is the same inert gas such as nitrogen or argon as the gas introduced into the three-dimensional stacking chamber 2 by the gas introduction part 38. The gas introduction unit 38 introduces an inert gas so that the residual oxygen concentration in the three-dimensional stacking chamber 2 is 100 ppm or less.

  If the control apparatus 20 introduce | transduces an inert gas in the space 121 of the cover part 120, the control apparatus 20 will manufacture a three-dimensional shape by the lamination | stacking head 12 (step S34). That is, the control device 20 starts manufacturing a three-dimensional shape after the control device 20 introduces an inert gas into the space 121 of the cover part 120. Since the pedestal 91 is accommodated in the space 121, the molding layer 92 is formed in the space 121 under an inert gas atmosphere. If the manufacture of the three-dimensional shape is completed, this process is finished. Note that step S32 and step S33 are also continued in step S34. That is, the control device 20 continues to discharge the air in the space 121 in the cover portion 120 by the cover portion gas discharge portion 122 while manufacturing the three-dimensional shape object. Further, the control device 20 continues to introduce an inert gas as appropriate into the space 121 in the cover part 120 while the three-dimensional shape is being manufactured. However, the control device 20 may appropriately discharge the air in the space 121 and appropriately introduce the inert gas into the space 121 according to, for example, the oxygen concentration and the inert gas concentration in the space 121.

  As described above, the three-dimensional laminating apparatus 1 </ b> A according to the second embodiment includes the cover unit 120. The cover part 120 covers the pedestal 91, discharges air in the space 121 in which the pedestal 91 is accommodated, and introduces an inert gas into the space 121. That is, the three-dimensional laminating apparatus 1A according to the second embodiment is inactive by exhausting air from a place where the molding layer 92 is formed after the inside of the three-dimensional laminating chamber 2 is placed in an inert gas atmosphere. Introduce gas. Therefore, the three-dimensional laminating apparatus 1A according to the second embodiment can make the periphery of the molding layer 92 more preferably in an inert gas atmosphere. Therefore, the three-dimensional laminating apparatus 1A according to the second embodiment can suppress the quality change of the powder P and suppress the deterioration of the quality of the three-dimensional shape object. Furthermore, the cover part gas introduction part 124 can introduce any gas. Therefore, the three-dimensional laminating apparatus 1A according to the second embodiment can manufacture a three-dimensional shape object under an optimum gas atmosphere according to, for example, the type of powder.

  Further, the three-dimensional laminating apparatus 1A according to the second embodiment discharges air in the cover part 120 and introduces an inert gas while manufacturing a three-dimensional shape object. Therefore, in the three-dimensional laminating apparatus 1A according to the second embodiment, even if the space 137 is formed between the end portion 135 of the cover portion 120 and the base portion 100, the inside of the cover portion 120 is preferably in an inert gas atmosphere. Can be down.

  In addition, the gas introduction opening 138 is provided below the gas discharge opening 136 in the Z-axis direction. As the gas for introducing argon or the like having a higher specific gravity than a gas such as oxygen in the air, the three-dimensional laminating apparatus 1A provides the gas introduction opening 138 below the gas discharge opening 136 in the Z-axis direction. When used, the cover portion 120 can be suitably filled with argon gas. When the gas to be introduced is lighter than air, the arrangement of the gas introduction opening 138 and the gas discharge opening 136 may be reversed.

  When introducing argon gas or the like having a higher specific gravity than a gas such as oxygen in the air into the cover portion 120, the gas introduction opening 138 is preferably formed above the pedestal 91 in the Z-axis direction. Argon gas having a higher specific gravity than gas such as oxygen in the air is likely to move downward in the Z-axis direction. By providing the gas introduction opening 138 above the pedestal 91 in the Z-axis direction, the three-dimensional laminating apparatus 1A according to the second embodiment allows the introduced argon gas to move more favorably around the molding layer 92. Can do. When the gas to be introduced is lighter than air, the gas introduction opening 138 is preferably formed below the pedestal 91 in the Z-axis direction.

  As mentioned above, although embodiment of this invention was described, these embodiment is not limited by the content of these embodiment. In addition, the above-described constituent elements include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Furthermore, the above-described components can be appropriately combined. Furthermore, various omissions, substitutions, or changes of the constituent elements can be made without departing from the spirit of the above-described embodiments and the like. Furthermore, various omissions, substitutions, or changes of the constituent elements can be made without departing from the spirit of the above-described embodiments and the like. For example, the three-dimensional laminating apparatus 1 according to the present embodiment is not limited to the configuration in which the powder P is ejected by the laminating head 12 and the powder P is irradiated with the laser light L. The three-dimensional laminating apparatus 1 is only required to supply the powder P, irradiate the powder P with the laser light L, form a molding layer, and appropriately apply machining to the molding layer. For example, the three-dimensional laminating apparatus 1 may form a molding layer by forming a powder layer with a powder supply unit and irradiating a part of the powder layer with laser light L to sinter the powder. Good. Further, for example, the three-dimensional laminating apparatus is connected to an external device through a communication line such as the Internet, and the processing condition, for example, the forming layer forming condition is changed based on an instruction input from the external device. It may be set. That is, the three-dimensional laminating apparatus may communicate using a communication line and change processing conditions from an external device.

DESCRIPTION OF SYMBOLS 1 Three-dimensional laminating apparatus 2 Three-dimensional laminating chamber 3 Preliminary chamber 4 Laminating head storage chamber 4a, 5a Z-axis slide part 5 Machining part storage chamber 6, 7 Door 10 Bed 11 Table part 12 Laminating head 13 Machining part 15 Y-axis Slide part 16 X-axis slide part 17 Rotary table part 18, 19 Bellows 20 Control device 22 Tool 23 Nozzle 25 Preliminary chamber gas discharge part 30 Shape measurement part 31 Heating head 32 Machining part measurement part 33 Tool exchange part 34 Nozzle exchange part 35 35A Powder introduction part 36 Base moving part 37 Gas discharge part 38 Gas introduction part 39 Powder recovery part 41, 42 Surface 43, 44, 45 Opening part 50 Space 51 Bellows part 53 Guide part 53a, 53b, 53c Sub guide part 55 Mountain part 56 Valley part 58a, 58b, 59b, 59c Movable part 61 Outer pipe 62 Inner pipe 63 Powder Flow path 64 Laser path 65a Powder injection port 65b Laser irradiation port 66 Main body 67 Light source 68 Optical fiber 69 Condensing unit 71 Input unit 72 Control unit 73 Storage unit 74 Output unit 75 Communication unit 80 Space 81, 81A Powder storage unit 82 , 82A Powder identification part 83 Cartridge 84 Material display part 85 Introduction part 86 Cyclone part 87 Gas discharge part 88 Powder discharge part 91 Base 92, 93 Molding layer 100 Base part 102, 104, 106, 108 Arrow 120 Cover part 121 Space 122 Cover part gas discharge part 124 Cover part gas introduction part 132 Attachment part 133 Opening part 134 Wall part 135 End part 136 Gas discharge opening part 137 Space 138 Gas introduction opening part 140 Opening part A Melting body B Solidified body L Laser beam P Powder

Claims (11)

A three-dimensional laminating apparatus for producing a three-dimensional shaped object by laminating a molding layer by irradiating a laser beam while injecting a powder material onto a base part, a pedestal, or an existing modeled object,
A gas introduction unit for adjusting a residual oxygen concentration when producing the three-dimensional shape by supplying an inert gas into the three-dimensional lamination chamber of the three-dimensional lamination apparatus;
A control device for controlling a supply condition of the inert gas in the gas introduction unit,
The control device includes:
A storage unit for storing at least one of the operation program of the three-dimensional laminating apparatus, the information of the three-dimensional laminating apparatus, and the design information of the three-dimensional shape object for determining the forming condition of the molding layer;
Supply of the inert gas in the gas introduction unit based on the information in the storage unit so as to obtain a predetermined gas atmosphere in which the residual oxygen concentration is adjusted according to the type of powder material used for stacking the molding layer A three-dimensional laminating apparatus comprising: a control unit that determines conditions. A reader for reading a material display portion displayed on a cartridge in which the powder material is enclosed;
The powder material is introduced from the cartridge from which the material display unit is read by the reader, and a conveyance path for conveying the powder material into the three-dimensional stacking chamber;
The three-dimensional laminating apparatus according to claim 1, further comprising: a powder identification unit that determines a type of the powder material based on information of the material display unit from the reader. The storage unit stores the type of the powder material used for laminating the molding layer and the conditions necessary for forming the molding layer,
The tertiary unit according to claim 2, wherein the control unit determines a necessary condition for forming the molding layer by comparing the determined type of the powder material with information stored in the storage unit. Original laminating equipment.   The three-dimensional stacking apparatus according to claim 1, wherein the gas introduction unit introduces an inert gas so that the entire three-dimensional stacking chamber has a predetermined gas atmosphere.   2. The three-dimensional laminating apparatus according to claim 1, wherein the gas introduction unit locally introduces an inert gas so that a periphery of the powder material injected to the molding layer has a predetermined gas atmosphere.   The gas introduction unit includes a first gas introduction unit that introduces an inert gas so that the entire three-dimensional stacking chamber has a predetermined gas atmosphere, and a predetermined gas atmosphere around the powder material injected into the molding layer. The three-dimensional laminating apparatus according to claim 1, further comprising: a second gas introduction unit that locally introduces an inert gas.   The three-dimensional laminating apparatus according to claim 1, wherein the residual oxygen concentration is 100 ppm or less.   The three-dimensional laminating apparatus according to claim 7, wherein the residual oxygen concentration is 10 ppm or less.   The three-dimensional stacking apparatus according to claim 1, further comprising a gas discharge unit that discharges the gas in the three-dimensional stacking chamber.   The gas introduction part has a first opening for taking in an inert gas into the three-dimensional stacking chamber, and the gas discharge part is a second opening for discharging gas from the three-dimensional stacking chamber. The three-dimensional laminating apparatus according to claim 9, wherein the first opening is disposed below the second opening. A cover portion covering a portion where the molding layer is laminated;
A cover part gas introduction part for introducing a predetermined gas into the cover part,
When the cover gas introduction part introduces the predetermined gas, the cover part makes the periphery of the base part the predetermined gas atmosphere.
The three-dimensional laminating apparatus according to claim 1.

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