JP2009006509A - Method and apparatus for manufacture of three-dimensional article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a three-dimensional article which enables efficient molding with plural light beams. <P>SOLUTION: A metal light forming machine 1 has a forming plate 3 on which a powder layer 21 of a metal powder 2 is laid, a forming table 31 holding the forming plate 3 and moving vertically, a powder layer forming section 4 forming the powder layer 21, an irradiation section 5 irradiating the powder layer 21 with two or more light beams, a camera 6 photographing the status of molding and a control section controlling the metal light molding machine 1. In the molding area of each powder layer 21, a molding area for molding is assigned preliminarily to each light beam L, and the irradiation section 5 is made to carry out scanning data sequences for individual molding areas at the same time, with each of the scanning data sequences carried out in order, so as to mold a three-dimensionally shaped molding through these parallel operations. Because a target powder layer can be irradiated with two or more light beams through parallel operations, a three-dimensionally shaped forming can be manufactured efficiently. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a manufacturing method and a manufacturing apparatus for a three-dimensional shaped object that irradiates a light beam onto an inorganic or organic powder material.

  Conventionally, a powder layer formed of an inorganic or organic powder material is irradiated with a light beam, the powder layer is melted to form a sintered layer, and a new powder layer is formed on the sintered layer. There is known a manufacturing method for manufacturing a three-dimensional shaped object by repeatedly irradiating a light beam to form a sintered layer.

  Further, a method of manufacturing a three-dimensional shaped object using a plurality of light beams is known (for example, see Patent Document 1).

However, the manufacturing method as shown in Patent Document 1 does not show a method for controlling a plurality of light beams for efficient modeling.
Japanese translation of PCT publication No. 7-501998

  The present invention solves the above-described problems, and an object of the present invention is to provide a manufacturing method and a manufacturing apparatus for a three-dimensional shaped object capable of performing efficient modeling with a plurality of light beams.

  In order to achieve the above object, the invention of claim 1 includes a powder layer forming step of supplying an inorganic or organic powder material to form a powder layer, and irradiating the powder layer with a light beam to melt the powder layer. An irradiation step for forming a sintered hardened layer, and by repeating the powder layer forming step and the irradiation step, a new sintered hardened layer integrated with the lower sintered hardened layer is laminated to form a three-dimensional structure. In the manufacturing method of the three-dimensional modeled object that models the modeled model, the three-dimensional modeled object has a plurality of light beam scanning means for scanning the light beam, and irradiates the light beam to a plurality of locations of the powder layer. A modeling area to be formed by a plurality of light beams is determined in advance with respect to the modeling area of the layer, and the light beam scanning unit simultaneously executes different scanning data corresponding to each modeling area in a three-dimensional manner by parallel operation. form It is intended to shape the molded article.

  According to a second aspect of the present invention, in the method for manufacturing a three-dimensional shaped article according to the first aspect, the modeling area handled by one light beam is subdivided into regions per unit area, and the modeling ends for each divided region. Is detected.

  The invention of claim 3 is the method of manufacturing a three-dimensional shaped article according to claim 1 or claim 2, and when the modeling of the modeling area that one light beam is in charge of, the modeling area of the other light beam It is for modeling.

  According to a fourth aspect of the present invention, in the method for manufacturing a three-dimensional shaped article according to any one of the first to third aspects, the area of the modeling area of each layer that each light beam takes charge of becomes equal. The entire modeling area is divided.

  The invention of claim 5 is the method of manufacturing a three-dimensional shaped article according to any one of claims 1 to 4, wherein each modeling area that each light beam takes charge scans the light beam. The entire modeling area is divided so as to be close to the light beam scanning means.

  The invention of claim 6 is the method for producing a three-dimensional shaped article according to claim 1 or claim 2, wherein the light beam to be irradiated is sintered density in the modeling of the three-dimensional shaped article having different sintered densities. Everything is different.

  The invention of claim 7 is the method for producing a three-dimensional shaped article according to any one of claims 1 to 6, wherein each light is emitted before shaping and / or during any shaping. The origin correction of the beam irradiation position is performed.

  Invention of Claim 8 was obtained by laminating until then after formation of the sintered hardened layer in the method for producing a three-dimensional shaped article according to any one of Claims 1 to 6. It further includes a cutting step for cutting and removing either or both of the surface portion and unnecessary portion of the three-dimensional shaped object, and each light beam irradiation position before or during any one of the forming operations In addition, the origin correction of the cutting deletion position is performed.

  According to a ninth aspect of the present invention, in the method for manufacturing a three-dimensionally shaped object according to any one of the first to eighth aspects, the light beam is branched to form a plurality of light beams.

  According to a tenth aspect of the present invention, in the method for manufacturing a three-dimensionally shaped object according to the ninth aspect, the light beam is branched by a half mirror.

  The invention of claim 11 is the method of manufacturing a three-dimensional shaped article according to claim 9, wherein the three-dimensional shaped article has a rotation axis that is installed on the optical axis of the light beam and is perpendicular to the optical axis, and the light is reflected by the rotation axis. The light beam is split by dividing the light beam into a light beam reflected by the rotating mirror and a light beam passing outside the end of the rotating mirror by a rotating mirror that changes an angle with the axis, The reflected light from the rotating mirror is received by a moving mirror that moves to the position where the reflected light is irradiated, reflected in the irradiation direction, and the angle between the rotating mirror and the optical axis is changed to change the branching amount of the light beam. Is.

  According to a twelfth aspect of the present invention, in the method for manufacturing a three-dimensional shaped article according to any one of the ninth to eleventh aspects, the power of the light beam is controlled.

  According to a thirteenth aspect of the present invention, in the method for manufacturing a three-dimensional shaped article according to the twelfth aspect, the power control of the light beam is performed by a hole having a different diameter provided on the optical axis of the light beam. By passing the light beam and limiting a part of the light beam.

  The invention of claim 14 is a powder layer forming means for forming a powder layer by supplying an inorganic or organic powder material, and irradiating the powder layer with a light beam to melt the powder layer to form a sintered hardened layer. A three-dimensional shape by laminating a new sintered hardened layer integrated with the lower sintered hardened layer by repeating the formation of the powder layer and the formation of the sintered hardened layer. In the apparatus for manufacturing a three-dimensional shaped object for modeling a three-dimensional object, the irradiation unit includes a plurality of light beam scanning units that scan a light beam, and each of the plurality of light beams is irradiated to a plurality of portions of the powder layer. , A modeling area to be performed by each of a plurality of light beams is determined in advance for a modeling area of one layer, and the light beam scanning unit is caused to sequentially execute different scanning data corresponding to each modeling area at the same time. By parallel operation With shaping the dimension shaped object, small portions a shaped area in which one of the light beams is responsible to the area per unit area, and detects the shaped ends each divided region.

  According to the first aspect of the present invention, since a plurality of light beams are irradiated in a parallel operation, a three-dimensional shaped object can be formed efficiently.

  According to the invention of claim 2, since the progress of modeling can be understood in detail, a three-dimensional shaped object can be efficiently modeled.

  According to invention of Claim 3, since each light beam also models the modeling area of another light beam, it can model efficiently.

  According to invention of Claim 4, since the modeling area area of each light beam is equal, modeling can be performed efficiently.

  According to the invention of claim 5, the positional accuracy of the light beam irradiation is improved, and the dimensional accuracy of the three-dimensional shaped object is improved.

  According to the invention of claim 6, since the condition of the light beam is not changed during modeling, modeling can be performed efficiently.

  According to the invention of claim 7, the dimensional accuracy of the three-dimensional shaped object is improved.

  According to the invention of claim 8, the dimensional accuracy of the three-dimensional shaped object is improved even in the manufacturing method having a cutting process.

  According to invention of Claim 9, while being able to achieve cost reduction of a manufacturing apparatus, a manufacturing apparatus can be reduced in size.

  According to the invention of claim 10, the light beam can be easily branched.

  According to the eleventh aspect of the present invention, the amount of branching of the light beam can be adjusted, and modeling can be performed efficiently.

  According to the twelfth aspect of the present invention, the power can be changed for each branched light beam, and modeling can be performed efficiently. Further, it is possible to control passage / blocking for each light beam.

  According to invention of Claim 13, the power for every branched light beam can be controlled easily, and modeling can be performed efficiently.

  According to the fourteenth aspect of the present invention, a plurality of light beams are irradiated by a parallel operation, so that a three-dimensional shaped object can be efficiently modeled.

(First embodiment)
A method for manufacturing a three-dimensional shaped object according to the first embodiment of the present invention will be described with reference to the drawings. FIG.1 and FIG.2 shows the structure of the metal stereolithography processing machine used for the manufacturing method. The metal stereolithography machine 1 includes a modeling plate 3 on which a powder layer 21 of metal powder 2 is laid, a modeling table 31 that holds the modeling plate 3 and moves up and down, and a powder layer that forms the powder layer 21. A forming unit 4, an irradiation unit 5 that irradiates the powder layer 21 with a light beam, a camera 6 that captures the progress of modeling, and a control unit 71 that controls the operation of each unit of the metal optical modeling machine 1 are provided.

  The powder layer forming unit 4 includes a supply tank 41 that supplies the metal powder 2, a material table 42 that raises the metal powder 2 in the supply tank 41, and a squeegee 43 that forms the powder layer 21. The squeegee 43 moves in the direction D and supplies the metal powder 2 on the material table 41 onto the modeling plate 3. The irradiation unit 5 adjusts the diameter of the light beam L, a light beam oscillator 51 that emits the light beam L, a demultiplexer 52 that divides the light beam L into a plurality, a switching device 53 that passes / blocks the light beam L, and A spot diameter changing device 54, a scanner 55 that scans the light beam L onto the powder layer 21 by a galvano mirror, and a reflection mirror 59 that reflects the light beam L and advances it to the optical path. The number of branches of the light beam L is not limited to three, and may be two or more. Further, instead of the configuration in which the light beam L is branched, a plurality of light beam oscillators 51 may be used to irradiate a plurality of light beams. The metal powder 2 is, for example, a spherical iron powder having an average particle diameter of 20 μm, and the light beam oscillator 51 is, for example, an oscillator of a carbon dioxide laser or a YAG laser.

  Next, the duplexer will be described. FIG. 3 shows a configuration example of the duplexer 52. The duplexer 52 includes a half mirror 52a and a reflection mirror 52b. The demultiplexer 52 divides the light beam L into transmitted light and reflected light by the half mirror 52a, and further branches the reflected light by reflecting it by the reflecting mirror 52b. When the light beam L is branched into three or more, the light beam L is further branched using the half mirror 52a. In this way, the light beam can be easily branched by using the half mirror.

  4A and 4B show a first modification of the duplexer 52. FIG. The duplexer 52 is made of a polyimide-based material, and an optical waveguide 52c branched in a Y shape is formed therein. The light beam L travels while totally reflecting the optical waveguide 52c, and is branched by the branching portion 52d. By configuring the duplexer 52 in such a configuration, the light beam can be easily branched.

  FIG. 5A shows a second modification of the duplexer 52, and FIG. 5B shows an enlarged reflection portion. The duplexer 52 includes a rotating mirror 52f having a rotating shaft 52e and a moving mirror 52g that reflects light reflected by the rotating mirror 52f. The rotating mirror 52f reflects a part of the light beam L, but allows the light beam L passing outside the end of the rotating mirror 52f to pass. The rotating mirror 52f changes the reflection amount of the light beam L by changing the angle with the optical axis of the light beam L. At this time, the moving mirror 52g moves in the direction of the arrow E, so that even if the angle between the optical axis of the light beam L and the rotating mirror 52f changes and the reflection direction of the reflected light changes, the reflected light is received and the irradiation direction Reflect to. As described above, the branching filter 52 can branch the light beam L and change the branching amount of the light beam L by changing the angle between the rotating mirror 52 f and the optical axis of the light beam L.

  Next, the switching device 53 will be described with reference to FIG. 6A and 6B show a configuration example of the switching device 53. FIG. The switching device 53 includes a reflection mirror 53b having a rotation axis 53a and a damper 53c that absorbs the light beam L. FIG. 6A shows a state where the switching device 53 blocks the light beam L. FIG. When blocking the light beam L, the reflecting mirror 53b is rotated by the rotating shaft 53a, the light beam L is reflected toward the damper 53c, and is absorbed by the damper 53c. FIG. 6B shows a state in which the light beam L is allowed to pass. When passing the light beam L, the reflection mirror 53b is rotated so as not to block the light beam L. With this configuration, the light beam L can be easily passed and blocked.

  6C and 6D show a modification of the switching device 53. FIG. The switching device 53 includes a damper 53e having a rotation shaft 53d. FIG. 6C shows a state where the switching device 53 blocks the light beam L. When blocking the light beam L, the damper 53e is rotated by the rotating shaft 53d so that the damper 53e is perpendicular to the optical axis of the light beam L, and the light beam L is absorbed by the damper 53d. FIG. 6D shows a state where the light beam L is allowed to pass. When passing the light beam L, the damper 53e is rotated so as to be parallel to the optical axis so that the damper 53e does not block the light beam L. With the switching device 53 having such a configuration, the light beam L can be easily passed and blocked.

  Next, a method for manufacturing a three-dimensional shaped object will be described with reference to FIGS. FIG. 7 shows the flow, and FIG. 8 shows a time-series state when the manufacturing method is performed. First, as shown in FIG. 8A, the modeling plate 3 is placed on the modeling table 31 (step S1). Next, the control unit lowers the modeling table 31 so that the step between the upper surface of the modeling plate 3 and the upper surface of the reference table 32 has a length Δt (step S2). Next, the control unit supplies the metal powder 2 on the material table 42 onto the modeling plate 3 by the squeegee 43. The squeegee 43 moves in the horizontal direction at the same height as the upper surface of the reference table 32, and forms the powder layer 21 having a thickness Δt on the modeling plate 3 (step S3). Steps S2 and S3 constitute a powder layer forming process.

  After step S3, as shown in FIG. 8B, the control unit scans the light beam L to an arbitrary position with a scanner (step S4), melts the powder layer 21, and is integrated with the modeling plate 3. A Δt sintered hardened layer 22 is formed (step S5). Steps S4 and S5 constitute an irradiation process.

  After step S5, the control unit determines whether or not the modeling is finished (step S6). If not finished, as shown in FIGS. 8C and 8D, the control unit returns to step S2, and steps S3 to S3 are performed. S5 is repeatedly executed, and the sintered hardened layer 22 is laminated. In this way, as shown in FIG. 8E, steps S2 to S6 are repeated until the modeling is completed, and the sintered layer 22 is laminated.

  Next, the operation of irradiating a plurality of light beams L will be described with reference to FIG. FIG. 9 shows a configuration for controlling irradiation. The light beam L is branched by the branching filter 52 into three light beams LA, LB, and LC. The control unit 71 transmits the scanning data of each light beam LA, LB, LC to the corresponding scanner controller 72. Based on the scanning data, the scanner controller 72 performs passage / blocking of the light beams LA, LB, and LC by the switching devices 53A, 53B, and 53C, and performs scanning by the scanners 55A, 55B, and 55C. In this way, the control unit 71 controls the light beams LA, LB, and LC.

  Next, the operation of sensing modeling will be described with reference to FIG. 10A shows a modeling area S, and FIG. 10B shows a sharing area for each light beam in the modeling area S. The modeling area S is divided into shared areas S1 and S2 that each of the two light beams models. FIG. 10C shows a modeling area that is subdivided into small areas S3 per unit area in order to manage the progress of modeling. A control part detects whether modeling was completed with the camera for every small area S3. FIG. 10D shows the state of the shared areas S1 and S2 in the middle of modeling, and the end areas S1E and S2E are areas where modeling is completed.

  Then, when the modeling of the sharing area S2 is not completed when the modeling of the sharing area S1 is completed as shown in FIG. 10 (e), the sharing area S1 is modeled as shown in FIG. 10 (f). The light beam that has been formed forms the shared area S2. In this way, since the modeling area is subdivided into small areas S3 per unit area and the progress of modeling is managed, the completion status of modeling is easy to understand, and when the modeling of the shared area planned by one light beam is completed The light beam can perform modeling of the shared area of other light beams, and can perform modeling efficiently.

  The sharing area dividing method is based on a method of equalizing the areas of the sharing areas. 11A shows the configuration of the three-dimensional shaped object to be shaped, FIG. 11B shows the horizontal cross-sectional position of the three-dimensional shaped object, and FIGS. 11C to 11E show the cross sections. 2 shows two shared areas S1 and S2. At the position of the cross section A, the dividing line M1 that divides the modeling area into the two shared areas S1 and S2 is at the upper and lower intermediate positions in the sectional view. At the position of the cross section B, the cross sectional shape is different from the shape of the cross section A, and the dividing line M2 in the cross section B moves in the lower direction in the cross sectional view than the dividing line M1. Then, at the position of the cross section C, the dividing line M3 moves in the upper direction in the sectional view from the dividing line M1. Thus, modeling can be performed efficiently by changing the position of the dividing line according to the position of the cross section so that the area of the shared area becomes equal.

  Further, the sharing area dividing method may be a method in which the sharing area of each light beam is close to the scanner 55 that irradiates each light beam. Fig.12 (a) shows the planar view of the divided | segmented modeling area, FIG.12 (b) shows the front view. The sharing area S1 of the scanner 55A is set under the scanner 55A. Similarly, the sharing area S2 is set below the scanner 55B, and the sharing area S3 is set below the scanner 55C. Since the shared area is close to each scanner 55, the positional accuracy of irradiation with the light beams LA, LB, and LC is good, and the precision of modeling is improved. This sharing area may be set to be close even if it is not under the scanner 55.

  Moreover, the method of dividing | segmenting the said shared area may be the method of dividing | segmenting for every sintering density of a modeling area, when the three-dimensional molded item is comprised from the area | region where a sintering density differs. FIGS. 13A and 13B show configurations of the divided modeling areas in plan view and front view, respectively. The three-dimensional shaped object is divided into three regions of a high density region S11, a medium density region S12, and a low density region S13 having different sintering densities. The scanner 55 for irradiating the light beam is different for each region, the high-density region S11 is irradiated with the high-density light beam LA from the scanner 55A, and similarly, the medium-density region S12 is scanned with the scanner. The light beam LB is irradiated from 55B, and the light beam LC is irradiated from the scanner 55C to the low density region S13.

  In this way, the sintering density is changed by changing the output of the light beam, the scanning speed, and the scanning pitch. By setting the light beam for each sintering density, the condition of the light beam can be changed. Since it is not necessary to change during scanning, it is efficient. Further, when a plurality of light beam oscillators 51 are used, if the output of the specific light beam oscillator 51 is increased for high density, the scanning speed does not have to be slowed down, which is efficient.

  Next, a modification of the manufacturing method of the first embodiment will be described with reference to FIG. FIG. 14 shows the configuration of a metal stereolithography machine used in this modification. In the figure, only the scanner 55 is shown for the irradiation unit. In the present modification, in addition to the first manufacturing method, the surroundings of the modeled object are further cut. The metal stereolithography machine 1 includes, in addition to the metal stereolithography machine according to the first embodiment, a milling head 73 that scrapes the periphery of the modeled object, and an XY drive mechanism 74 that moves the milling head 73 to a cutting location. Have. In this modification, the powder layer forming step and the irradiation step are repeated, and when the thickness of the sintered hardened layer becomes equal to or greater than the thickness determined from the effective blade length of the milling head 73, the milling head 73 is moved by the arrow X and the arrow by the XY drive mechanism 74. It is moved in the Y direction, and a cutting process for cutting the surface portion and unnecessary portion of the modeled object is performed. The surface roughness of the manufactured three-dimensional shaped object becomes fine, and the dimensional accuracy is improved.

(Second Embodiment)
A method for manufacturing a three-dimensionally shaped object according to the second embodiment of the present invention will be described with reference to FIG. In the present embodiment, in addition to the manufacturing method of the first embodiment, the origin correction of the irradiation position of the light beam and the cutting deletion position is further performed. Fig.15 (a) shows the structure of the metal stereolithography machine used for this embodiment. The metal stereolithography machine 1 includes a milling head 73, and has an imaging camera 75 and an illumination unit 76 next to the milling head 73. For the origin correction, the target plate 77 is set on the modeling table 31 before modeling, the target plate 77 is marked by cutting with the milling head 73 or the light beam L, and the imaging camera 75 and the illumination unit are placed at the position of the mark. 76 is moved by the XY drive mechanism 74, and the coordinates of the mark are measured. When the origin correction is performed during the modeling, the modeling is stopped, the target plate 77 is placed on the modeled object, and the target plate 77 is used to perform the same method as described above.

  As an example of the origin correction, a method for correcting the origin of the irradiation position of the light beam will be described. FIG. 15B shows a plan view of the target plate 77, and FIG. 15C shows an enlarged lattice pattern marked on the target plate 77. First, the target plate 77 is set on the modeling table 31. When the light beam is a carbon dioxide laser, the target plate 77 is, for example, a thermal paper or an acrylic plate, and when the light beam is a YAG laser, for example, a plate having an opaque acrylic surface coated with white is used. Subsequently, a lattice pattern 78 is marked on the target plate 77 by the light beam L.

  Subsequently, the imaging camera 75 is moved to each grid point 79 by the XY drive mechanism 74, the coordinates of each grid point 79 are measured, and an error from the original coordinate is measured in the X direction and the Y direction. The averages ΔX and ΔY of errors of all grid points 79 are calculated, and the deviation between the X direction and the Y direction is corrected. Subsequently, the coordinates of the four corner points E1 to E4 of the grid pattern 78 are measured, and the distances between the points E1, E2, E1, E3, E2, E4, and E3 are measured. Measure the error from the desired distance. From this error, the gain (enlargement ratio) in the X direction and the Y direction is corrected. In this way, the correction of the origin is performed by repeating the correction in the X and Y directions and the correction of the gain. The origin correction of the cutting deletion position is performed in the same manner as the origin correction of the irradiation position of the light beam. By performing the origin correction, the dimensional accuracy of the three-dimensional shaped object is improved.

(Third embodiment)
A method for manufacturing a three-dimensionally shaped object according to the third embodiment of the present invention will be described with reference to FIG. In the present embodiment, the power of the light beam is controlled in addition to the first embodiment.

  FIG. 16A shows the configuration of the power variable device 56. The power variable device 56 is installed on the optical axis of the light beam, has a disk shape with an axis 57 at the center, and includes a plurality of holes 58a to 58c having different diameters at the periphery of the disk. A hole 58 is provided. The variable power device 56 rotates about the axis 57 to align the hole 58 of a predetermined diameter with the optical axis of the light beam L. At this time, the hole 58 is formed so that the center of the hole 58 and the optical axis of the light beam L are aligned. FIG. 16B shows a state where the light beam L is transmitted 100%. A hole 58a having a hole diameter larger than the diameter of the light beam L is aligned with the optical axis of the light beam L, and the light beam L passes through the hole 58a without being limited in power. FIG. 16C shows a state where the transmission amount of the light beam L is limited. The optical axis of the light beam L is matched with a hole 58b or 58c whose hole diameter is smaller than the diameter of the light beam L, and the light beam L is limited in power by an amount larger than the hole diameter. Yes.

  The power variable device 56 is also provided with a portion where the hole 58 is not opened. By aligning the portion where the hole 58 is not opened with the optical axis of the light beam L, the light beam L can be blocked. In this way, by using the power variable device 56, even for a light beam divided from the same light beam, the output can be adjusted for each light beam and the density of the modeled object can be changed. It is also possible to control passage / blocking of the light beam.

  Next, a modification of the power variable device will be described. FIGS. 17A to 17C show a state where the power variable device limits the power of the light beam. The power variable device 56 includes a liquid crystal panel, and the transmittance can be changed by applying a voltage to the liquid crystal panel. The power of the light beam is adjusted by installing the liquid crystal panel on the optical axis of the light beam and adjusting the transmittance of the liquid crystal panel. In FIG. 17A, the light beam L is transmitted 100%, in FIG. 17B, the light beam L is transmitted 50%, and in FIG. 17C, the light beam is blocked. is doing. Since the transmittance of the liquid crystal can be changed finely, the power of the light beam can be finely controlled.

  In addition, this invention is not restricted to the structure of the said various embodiment, A various deformation | transformation is possible in the range which does not change the meaning of invention. For example, the composition of the metal powder is not limited to the configuration of the above embodiment, and may be an organic powder material.

The perspective view of the metal stereolithography processing machine used for the manufacturing method which concerns on the 1st Embodiment of this invention. The block diagram of the metal stereolithography machine. The block diagram of the splitter of the metal stereolithography machine. (A) is a perspective view of the 1st modification of the splitter of the metal stereolithography machine, (b) is a top view. (A) is a front view of the 2nd modification of the duplexer of the metal stereolithography processing machine, (b) is an enlarged view of the reflective part of a duplexer. (A) And (b) is a front view of the switching device of the metal stereolithography machine, (c) And (d) is a front view of the modification of a switching device. The flowchart of the manufacturing method which concerns on 1st Embodiment. The figure which shows the manufacturing method in time series. The figure which shows the control method of the light beam in the manufacturing method. The figure which shows the detection method of modeling in the manufacturing method. The figure which shows the assignment area divided | segmented from the modeling area in the manufacturing method. The figure which shows the 1st modification of the division | segmentation method of modeling area. The figure which shows the 2nd modification of the division | segmentation method of modeling area. The perspective view of the metal stereolithography machine used for the manufacturing method which concerns on the 2nd Embodiment of this invention. (A) is a front view of the metal stereolithography machine, (b) is a plan view of a target plate used in the metal stereolithography machine, and (c) is an enlarged view of the target plate. (A) is a perspective view of the power variable device used for the manufacturing method which concerns on the 3rd Embodiment of this invention, (b) And (c) is a figure which shows the state in which the power variable device is controlling the power of the light beam. . (A) thru | or (c) is a figure which shows the state in which the power variable device of a modification is controlling the power of a light beam.

Explanation of symbols

1 Metal Stereolithography Machine (Three-dimensional shaped object manufacturing equipment)
21 Powder layer 22 Sintered hardened layer 4 Powder layer forming part (powder layer forming means)
5 Irradiation part (irradiation means)
52a Half mirror 52e Rotating shaft 52f Rotating mirror 52g Moving mirror 55 Scanner (light beam scanning means)
L Light beam

Claims (14)

A powder layer forming step of forming a powder layer by supplying an inorganic or organic powder material, and an irradiation step of irradiating the powder layer with a light beam to melt the powder layer to form a sintered hardened layer, A method for producing a three-dimensional shaped article that forms a three-dimensional shaped article by laminating a new sintered hardened layer integrated with a lower sintered hardened layer by repeating the powder layer forming step and the irradiation step. In
A plurality of light beam scanning means for scanning the light beam;
While irradiating a plurality of locations of the powder layer with the light beam, a modeling area to be performed by a plurality of light beams is determined in advance for a modeling area of one layer,
A method of manufacturing a three-dimensional shaped object, wherein the light beam scanning unit simultaneously executes different scanning data corresponding to each modeling area and forms a three-dimensional shaped object by a parallel operation.   The method for producing a three-dimensional shaped object according to claim 1, wherein a modeling area handled by one light beam is subdivided into areas per unit area, and the completion of modeling is detected for each divided area.   3. The method for manufacturing a three-dimensional shaped object according to claim 1, wherein, when the modeling of the modeling area handled by one light beam is completed, modeling of the modeling area of the other light beam is performed.   The three-dimensional shape according to any one of claims 1 to 3, wherein the entire modeling area is divided so that the areas of the modeling areas of the respective layers handled by the respective light beams are equal to each other. Manufacturing method of a model.   5. The entire modeling area is divided so that the modeling area that each light beam takes charge is close to each light beam scanning means that scans the light beam. The manufacturing method of the three-dimensional shape molded article as described in any one of Claims.   3. The method for producing a three-dimensional shaped object according to claim 1, wherein a light beam to be irradiated is different for each sintered density in modeling of a three-dimensional shaped object having different sintered densities.   The three-dimensional shape according to any one of claims 1 to 6, wherein an origin correction of an irradiation position of each light beam is performed before modeling or during any modeling or both. Manufacturing method of a model.   After the formation of the sintered hardened layer, the method further comprises a cutting step for cutting and removing one or both of the surface portion and the unnecessary portion of the three-dimensionally shaped object obtained by stacking up to that time, before shaping and optionally The three-dimensional shape according to any one of claims 1 to 6, wherein the origin correction of the irradiation position of each light beam and the cutting deletion position is performed during either one or both of the forming steps. Manufacturing method of a model.   The method for manufacturing a three-dimensional shaped object according to any one of claims 1 to 8, wherein the light beam is branched to form a plurality of light beams.   The method of manufacturing a three-dimensional shaped object according to claim 9, wherein the light beam is branched by a half mirror.   A light beam reflected on the rotating mirror by a rotating mirror that is installed on the optical axis of the light beam and has a rotation axis perpendicular to the optical axis, and changes an angle with the optical axis by the rotation axis. And the light beam that passes outside the end of the rotating mirror is split, and the reflected light from the rotating mirror is received and irradiated by a moving mirror that moves to the irradiation position of the reflected light. The method for manufacturing a three-dimensional shaped object according to claim 9, wherein the branching amount of the light beam is changed by reflecting in a direction and changing an angle between the rotating mirror and the optical axis.   The method of manufacturing a three-dimensional shaped object according to any one of claims 9 to 11, wherein power of the light beam is controlled.   The power control of the light beam is performed by passing the light beam through holes of different diameters provided on the optical axis of the light beam and limiting a part of the light beam. The manufacturing method of the three-dimensional shape molded article of 12. A powder layer forming means for supplying an inorganic or organic powder material to form a powder layer; and an irradiation means for irradiating the powder layer with a light beam to melt the powder layer to form a sintered hardened layer. Three-dimensional modeling of a three-dimensional shaped object by laminating a new sintered hardened layer integrated with a lower sintered hardened layer by repeating the formation of the powder layer and the sintered hardened layer In the apparatus for manufacturing a shaped object,
The irradiating means has a plurality of light beam scanning means for scanning the light beam, irradiates the plurality of light beams to a plurality of portions of the powder layer, and applies a plurality of light beams to a modeling area of one layer. Predetermining the modeling area that each performs,
At the same time, the light beam scanning unit simultaneously executes different scanning data corresponding to each modeling area to form a three-dimensional shaped object by parallel operation,
An apparatus for producing a three-dimensional shaped object, characterized in that a modeling area handled by one light beam is subdivided into areas per unit area, and the completion of modeling is detected for each divided area.

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