JP2017007221A - Powder bed melting and binding apparatus, and powder bed melting and binding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a powder bed melting and binding apparatus comprising a conveyance member which can prevent large load from being partially applied to a lower layer when conveying a powder material even when a powder material is heavy.SOLUTION: A powder bed melting and binding apparatus has: a powder material housing container housing a powder material; a thin layer forming container which is placed in parallel with the powder material housing container and forms a thin layer of the powder material; and a conveyance member 104 which moves on a top face of the powder material housing container and the thin layer forming container to carry the powder material, in which the conveyance member 104 has a plurality of horizontally-long blades 52a to 52e, and each blade 52a to 52e is arrayed opposing to each other in a moving direction and with a gap.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a powder bed fusion bonding apparatus and a powder bed fusion bonding method for laminating thin layers of powder material that are selectively melted and bonded to form a three-dimensional structure.

  The powder bed melting and bonding apparatus includes an energy beam emitting unit that emits an energy beam for heating, and a thin layer forming unit that forms a thin layer of a powder material and melts and bonds with the energy beam.

  Further, as shown in FIG. 11, the thin layer forming section includes powder material storage containers 12a and 12b for storing the powder material 19, a thin layer forming container 11 for forming the thin layer 19a of the powder material, and a thin layer forming section. And a recoater 105 that carries the powder material 19.

  Using this powder bed melting and bonding apparatus, as shown in FIGS. 11A to 11C and FIG. 12A, the recoater 105 is moved to the right side to push the powder material 19 from the powder material storage container 12a. Then, it is carried into the thin layer forming container 11 to form a thin layer 19a of the powder material on the part table 15. The remaining powder material 19 is stored in the powder material storage container 12b.

  Thereafter, as shown in FIG. 12 (b), the specific region of the thin layer 19a is heated by the energy beam 20, so that the powder material 19 is melted and bonded and solidified to form the first bonding layer 19b. To do.

  Subsequently, by moving the recoater 105 to the left according to the above operation, the second coupling layer 19b is formed. In this case, the powder material storage container 12b is the powder material supply side, and the powder material storage container 12a is the storage side for storing the powder material remaining after forming the thin layer.

  Thereafter, the above operation is repeated, and the bonding layer 19b is laminated over several hundreds or thousands of layers to produce a three-dimensional structure.

  Patent Documents 1 and 2 below describe such a powder bed fusion bonding method. In particular, the invention according to Patent Document 2 discloses a method for suppressing the warping of the bonding layer 19b without using an object support and a flat plate support means for fixing the bonding layer as in Patent Document 3. Yes.

JP 2008-155538 A Japanese Patent Laying-Open No. 2015-038237 Patent 4054075

  When the recoater 105 shown in FIGS. 11 and 12 is used, a large amount of the powder material 19 is accumulated in front of the recoater 105 as shown in FIG.

  At this time, when the powder material 19 is heavy, as shown in FIG. 13, a large load is applied to the lower layer partially in front of the recoater 105. Therefore, if the bonding layer 19b is formed in the lower layer, the powder While the material 19 is being transported, a force is applied to the bonding layer 19b. Therefore, the coupling layer 19b is tilted and is dragged by the recoater 105 as it is. As a result, there is a problem that the position of the bonding layer 19b is shifted and normal modeling cannot be performed.

  The present invention has been created in view of the above-mentioned problems, and a conveying member that can prevent a large load from being partially applied to the lower layer when conveying the powder material even when the powder material is heavy. The present invention provides a powder bed fusion bonding apparatus and a powder bed fusion bonding method provided with a (recoater).

  In order to solve the above problems, according to one aspect, a powder material storage container that stores a powder material, a thin layer forming container that is placed side by side with the powder material storage container and forms a thin layer of the powder material, and the powder A material storage container and a transport member for moving the upper surface of the thin layer forming container and transporting the powder material, the transport member comprising a plurality of horizontally long blades, each blade facing the moving direction; There is provided a powder bed melt-bonding device characterized in that they are spaced apart from one another.

  According to another aspect, a step of preparing a conveying member having a plurality of horizontally long blades, each of the blades facing each other in the moving direction and arranged at intervals, and the conveying member is powdered Moving the material onto the material, pushing the powder material up and supplying it between the blades; and moving the conveying member to hold the powder material between the blades A powder bed melt bonding method characterized in that it comprises a step of conveying the material.

  According to the present invention, a plurality of horizontally long blades face each other in the moving direction and have a conveying member that is arranged at a distance from each other.

  Therefore, by moving the conveying member and placing it on the powder material and pushing up the powder material to supply the powder material between the multiple blades, the conveying powder material is distributed among the blades. Can be arranged. Therefore, the amount of powder material carried by one blade can be reduced.

  This reduces the amount and weight of the powder material that accumulates in front of one blade while moving the conveying member and conveying the powder material, so that the lower layer is partially transferred when conveying the powder material. It is possible to prevent a large load from being applied.

  Accordingly, during transportation of the powder material on the layer on which the bonding layer is formed, the bonding layer can be prevented from being displaced and normal modeling can be performed.

  Thus, the carrying member of the present invention is particularly effective when applied to a powder bed melt bonding method in which a bonding layer is laminated without being fixed to a support means.

It is a figure which shows the powder bed fusion | bonding apparatus which concerns on embodiment of this invention. (A) is a top view which shows the powder bed fusion | bonding apparatus of FIG. 1, (b) is sectional drawing which follows the II line | wire of (a). It is a perspective view which shows the recoater which concerns on embodiment of this invention. It is sectional drawing which shows an aspect when the recoater of FIG. 3 is arrange | positioned on the upper surface of a powder material storage container. (A)-(c) is sectional drawing which shows the conveyance aspect of the powder material by the recoater of FIG. It is sectional drawing which shows the comparison with the conveyance aspect of the powder material by the recoater of embodiment of this invention, and the conveyance aspect of the powder material by the recoater of a prior art example. (A)-(c) is sectional drawing (the 1) which shows the powder bed fusion | bonding method using the recoater of FIG. (A)-(c) is sectional drawing (the 2) which shows the powder bed fusion | melting bonding method using the recoater of FIG. (A)-(c) is sectional drawing (the 3) which shows the powder bed fusion | bonding method using the recoater of FIG. (A)-(c) is sectional drawing (the 4) which shows the powder bed fusion | bonding method using the recoater of FIG. (A)-(c) is sectional drawing (the 1) which shows the powder bed fusion | melting bonding method using the recoater of a prior art example. It is sectional drawing (the 2) which shows the powder bed fusion | melting bonding method using the recoater of a prior art example. It is sectional drawing explaining the problem of a prior art example.

  Embodiments of the present invention will be described below with reference to the drawings.

(1) About powder bed fusion | bonding apparatus FIG. 1: is a schematic diagram shown about the structure of the powder bed fusion | bonding apparatus which concerns on embodiment of this invention.

  As a heating energy beam source for emitting a heating energy beam for melting and bonding powder materials, there are a laser light source for emitting laser light, an electron beam source for emitting electron beams and other particle beams, and other particle beam sources. Yes, it can be applied to the present invention. In the following, description will be made using a laser light source.

  Examples of the powder material include iron, stainless steel, copper alloy, cobalt chrome, gold, tungsten, aluminum, aluminum alloy, titanium or other metal powder, resin powder, or ceramic powder, which can be applied to the present invention. The resin is particularly effective when applied to the present invention in the case of a resin that has poor fluidity or a glass bead that is made of glass fibers and glass flakes mixed with strength to give strength.

  As shown in FIG. 1, the powder bed melting and bonding apparatus includes a laser beam emitting unit (energy beam emitting unit) 101 and a recoater (powder material conveying member) 104, and a thin layer forming unit 102 on which modeling is performed, It has a control unit (control means) 103 that controls modeling.

  The control unit 103 is connected to the laser beam emitting unit 101 and the thin layer forming unit (including the recoater 104) 102, exchanges electrical signals with each unit 101, 102, controls each unit 101, 102, and based on it Control the modeling. Thereby, it is possible to control modeling automatically.

  Below, the detail of each part 101,102,103 in this powder bed fusion | bonding apparatus is demonstrated.

  FIGS. 2A and 2B are diagrams showing the configuration of the laser beam emitting portion 101 and the thin layer forming portion 102. FIG. 2A is a top view, and FIG. 2B is a cross-sectional view taken along the line II of FIG. 2A. In FIG. 2A, the laser beam emitting unit 101 is omitted.

(I) Configuration of Laser Light Emitting Unit 201 The laser light emitting unit 101 shown in FIG. 2B includes a laser light source, an optical system, and an XYZ driver.

As the laser light source, a YAG laser light source that emits laser light having a wavelength of around 1,070 nm, a fiber laser light source, a high-output CO ₂ laser light source that emits laser light with a wavelength of 10.6 μm, or the like is mainly used. In consideration of not only the wavelength absorptivity of the powder material 19 but also cost performance, the use wavelength is properly selected.

  A semiconductor laser (LD) having a wavelength of about 700 nm to 940 nm is preferably used if a high-power semiconductor laser can be obtained in the future. This is because the shorter the wavelength, the higher the absorption rate of the laser beam by the metal powder.

  The optical system has a galvanometer mirror (comprised of an X mirror and a Y mirror) and a lens.

The XYZ driver sends a control signal for operating the X mirror, the Y mirror, and the lens together with the laser light source in accordance with a control signal from the control unit 103, and performs the following operation.

  That is, based on the slice data (drawing pattern) of the three-dimensional structure to be produced, the angle of the X mirror and the Y mirror is changed to scan the laser light 19 and to turn the laser light source on and off as appropriate.

  During this time, the lens is continuously moved in accordance with the movement of the laser beam 21 so that the laser beam 21 is focused on the surface of the thin layer 19a of the powder material.

  In this manner, the laser light 21 is selectively irradiated to the thin layer 19a of the powder material to heat a specific region. The thin layer 19a of the powder material is melted by controlling the electric power applied to the laser light source.

  Note that “melting” includes both melting the entire powder particle to fluidize the powder material and melting the surface of the powder particle mainly as in the case of sintering. The same applies to the following description.

(Ii) Configuration of Thin Layer Forming Unit 102 As shown in FIGS. 2A and 2B, the thin layer forming unit 102 includes a thin layer forming container 11 in which modeling is performed on the thin layer 19a of the powder material. The first powder material storage container 12a and the second powder material storage container 12b installed on both sides of the container 12a, 11b, and 12b are moved to carry the powder material 19 to form a thin layer 19a of the powder material. And a recoater 104.

  Further, a left flange 13a is provided between the thin layer forming container 11 and the first powder material storage container 12a, and a right flange 13b is provided between the thin layer forming container 11 and the second powder material storage container 12b. .

  The first powder material storage container 12a, the left side flange 13a, the thin layer forming container 11, the right side flange 13b, and the second powder material storage container 12b are joined so that their upper surfaces are flush with each other. As a result, the recoater 104 can smoothly move over the entire area on the upper surfaces of all the containers 12a, 11, 12b.

  In the thin layer forming container 11, as shown in FIG. 2B, a thin layer 19a of a powder material is formed on a part table (first lifting platform) 15 which also serves as the bottom of the container 11, and the thin layer 19a The coupling layer 19b is formed by irradiation with the laser beam 20. The region where the thin layer 19a is formed has a square planar shape.

  Then, the part table 15 is sequentially lowered to laminate the bonding layer 19b, and a three-dimensional structure is produced.

  In the first powder material storage container 12a, the powder material 19 is stored on a first feed table (second lifting platform) 17a that also serves as the bottom of the container 12a. In the second powder material storage container 12b, the bottom of the container 12b is stored. The powder material 19 is accommodated on the second feed table (third lifting platform) 17b which also serves as the second feed table 17b. The area | region which accommodates the powder material 19 of both the 1st powder material storage container 12a and the 2nd powder material storage container 12b has the same shape and dimension, and has a rectangular planar shape whose depth is longer than a horizontal width. The lateral width is the width of the region in the moving direction of the recoater 104, and the depth is the width of the region in the direction orthogonal to the moving direction of the recoater 104.

  When one of the first powder material storage container 12a and the second powder material storage container 12b is used as the supply side of the powder material 19, the other powder material 19 remaining after the thin layer 19a of the powder material is formed. The storage side.

  Support shafts 16, 18a, and 18b are attached to the lower surfaces of the part table 15, the first feed table 17a, and the second feed table 17b, respectively. The support shafts 16, 18a, and 18b are connected to a drive device (not shown) that moves the support shafts 16, 18a, and 18b up and down.

  The driving device is controlled by a control signal from the control unit 103 to raise the feed-side feed table 17a or 17b to supply the powder material 19, and to lower the storage-side feed table 17b or 17a to remain. Houses the powder material 19.

  In addition, a heating means is provided to preheat and raise the temperature of the powder material 19 accommodated in the containers 12a and 12b and the thin layer 19a of the powder material formed in the container 11. In the embodiment, the heaters 14a and 14b are displayed only on the lower surfaces of the left flange 13a and the right flange 13b, but the heaters not shown in the partition walls of the containers 11, 12a and 12b, the part table 15 and the feed table 17a or 17b are also shown. Built in. Further, infrared irradiation means may be provided above the left flange 13a and the right flange 13b.

  Next, the recoater 104 will be described in detail with reference to FIGS.

  As shown in FIG. 3, the recoater 104 has five horizontally long plate-like blades 52a to 52e facing each other in the moving direction of the recoater 104 and arranged at equal intervals.

  The blades 52a to 52e are fixed by support members 53a to 53c that penetrate the surfaces of the blades 52a to 52e. The blades 52a and 52e at both ends are reinforced by plate-like reinforcing members 51a and 51b having substantially the same length as the blades 52a and 52e, respectively.

  The distance between the blades 52a and 52e at both ends is slightly larger than the lateral width (both are about 340 mm) of the powder material storage containers 12a and 12b in which the powder material 19 is stored, for example, about 344 mm. Accordingly, the interval between the blades 52a to 52e is about 86 mm.

  Thereby, as shown in FIG. 4, the blades 52a and 52e at both ends are respectively edge portions Ea, Eb facing in the lateral width direction of the powder material storage containers 12a and 12b, just outside the region where the powder material 19 is stored. Can be placed on top. Therefore, the intermediate blades 52b to 52d are disposed on the powder material 19 accommodated in the containers 12a and 12b, respectively.

  The width of each blade 52a to 52e is slightly larger than the depth of the powder material storage containers 12a and 12b and the thin layer forming container 11 (both are about 560 mm), for example, about 580 mm.

  The lower ends of the blades 52a to 52e are the first powder material storage container 12a, the left flange 13a, the thin layer forming container 11, the right flange 13b, the upper surface of the second powder material storage container 12b, and the powder. Move over the top surface of a thin layer of material or powder material. Therefore, the lower end portions of the blades 52a to 52e are thin like the cutting edges so that the movement can be performed smoothly.

  The blades 52a and 52e at both ends, one of which is the last when the recoater 104 is reciprocated, determine the thickness of the thin layer of the powder material to be formed and the flatness of the surface by the lower ends. Therefore, the lower end portion is brought into contact with the upper surfaces of the first powder material storage container 12a, the left side flange 13a, the thin layer forming container 11, the right side flange 13b, and the second powder material storage container 12b, and the flatness of the lower end part In addition, it is necessary to provide high accuracy with respect to the level.

  On the other hand, the intermediate blades 52b to 52d are mainly responsible for transporting the powder material 19, so it is not always necessary to contact the upper surface of the thin layer forming container 11, etc. High accuracy is not required. From such a viewpoint, the lower ends of the intermediate blades 52b to 52d are made higher than the positions of the lower ends of the blades 52a and 52e at both ends, whereby the blades 52a and 52e at both ends are placed on the upper surface of the thin layer forming container 11 or the like. When placed in contact with each other, the lower end portions of the intermediate blades 52b to 52d are preferably slightly lifted from the upper surface of the thin layer forming container 11 or the like in accordance with the accuracy. There is an advantage that the movement of the recoater 104 becomes smoother.

  Next, how the powder material is conveyed by the recoater 104 will be described. The movement of the recoater 104 described below is controlled by the control unit 103.

  FIG. 5A shows that the recoater 104 is moved onto the powder material 19 accommodated in the powder material storage container 12a or 12b, and the powder material 19 is pushed up by the feed table 17a or 17b. A state in which the powder material 19 is placed in between is shown.

  An amount of powder material 19 that is slightly larger than one thin layer is distributed in four spaces between the blades 52a to 52e.

  FIG.5 (b) shows the conveyance aspect of powder material when moving to the right side from the state shown to Fig.5 (a).

  In this case, the leftmost blade 52a is the last part. Since the powder material 19 is transported while substantially maintaining the dispersed state in the four spaces between the blades 52a to 52e, the transport amount of the powder material 19 per blade is a quarter of the conventional transport amount. It becomes about one. Therefore, the amount of the powder material 19 that accumulates in front of each of the blades 52a to 52d during the conveyance of the powder material 19 is significantly smaller than that of the prior art as shown in FIG. Therefore, it is possible to prevent a large load from being partially applied to the lower layer.

  FIG.5 (c) shows the conveyance aspect of powder material when moving to the left side from the state shown to Fig.5 (a).

  In FIG. 5C, the rightmost blade 52e is the last part. Also in this case, the carrying amount of the powder material 19 per blade is approximately one-fourth of the conventional carrying amount. As a result, the amount of powder material 19 that accumulates in front of each blade 52b-52e during transportation of the powder material 19 is significantly reduced, so that it is possible to prevent partial application of a large load to the lower layer. it can.

(2) About the powder bed fusion | bonding method of this embodiment With reference to FIGS. 7-10, the powder bed fusion | melting method of this embodiment is demonstrated.

  7 to 10 are cross-sectional views showing the powder bed melting and bonding apparatus operating under the control of the control unit 103. FIG.

  First, as shown in FIG. 7A, the recoater 104 is placed on the first powder material storage container 12a. At this time, the blades 52a and 52e at both ends are respectively disposed on opposing edges of the first powder material storage container 12a, and the blades 52b to 52d at the intermediate portions are disposed on the powder material 19.

  Next, as shown in FIG. 7B, the first feed table 17a on which the powder material 19 is placed is raised to cause the powder material 19 to protrude from the first powder material storage container 12a. As a result, the powder material 19 is distributed and placed between the blades of the recoater 104.

  Further, the part table 15 is lowered by one thin layer. Further, the second feed table 17b is lowered to such an extent that the powder material 19 remaining after the thin layer is formed is sufficiently stored.

  Next, as shown in FIG. 7 (c), the recoater 104 is moved to the right side, and the powder material 19 protruded from the first powder material storage container 12 a is pushed and carried to the thin layer forming container 11.

  Next, as shown in FIG. 8 (a), the recoater 104 is moved to the right to bring the powder material 19 into the thin layer forming container 11 and level the surface, and the thin layer 19a of the powder material is placed on the part table 15. To form.

  Further, in order to carry the remaining powder material 19 to the second powder material storage container 12b, the recoater 104 is moved to the right side.

  Next, as shown in FIG. 8B, the remaining powder material 19 is stored on the second feed table 17 b of the second powder material storage container 12 b by the recoater 104. The recoater 104 is disposed on the second powder material storage container 12b.

  Next, as shown in FIG. 8C, based on the slice data (drawing pattern), the thin layer 19a of the powder material is irradiated with the laser light 20 to form the first bonding layer 19b.

  Next, FIG. 9A shows a state after the laser beam 20 is irradiated. At this time, the blades 52a and 52e at both ends are respectively placed on opposing edges of the second powder material storage container 12b, and the blades 52b to 52d at the intermediate portions are placed on the powder material 19.

  Next, as shown in FIG. 9B, the second feed table 17b on which the powder material 19 is placed is raised to cause the powder material 19 to protrude from the upper surface of the second powder material storage container 12b. As a result, the powder material 19 is distributed and placed between the blades of the recoater 104.

  Further, the part table 15 is lowered by one thin layer, and the first feed table 17a is lowered.

  Next, as shown in FIG. 9 (c), the recoater 104 is moved to the left side to push away the powder material 19 protruding from the second powder material storage container 12 b and carry it to the thin layer forming container 11.

  Next, as shown in FIG. 10A, the recoater 104 is further moved to the left, and the recoater 104 brings the powder material 19 into the thin layer forming container 11 to level the surface, and the first bonding layer 19b. A thin layer 19a of powder material is formed on the substrate.

  Next, as shown in FIG. 10B, the recoater 104 is further moved to the left side, and the remaining powder material 19 is carried to the first powder material storage container 12a and stored on the first feed table 17a. The recoater 104 is disposed on the first powder material storage container 12a.

  Next, as shown in FIG. 10C, based on the slice data (drawing pattern), the thin layer 19a of the powder material is irradiated with the laser light 20 to form the second coupling layer 19b.

  Thereafter, the steps shown in FIGS. 7A to 10C are repeated, and a required number of bonding layers 19b are stacked to produce a three-dimensional structure.

  According to the embodiment of the present invention described above, the five horizontally long blades 52a to 52e are provided with the recoater 104 which faces the moving direction and is arranged at intervals.

  Then, the recoater 104 is moved onto the powder material storage container 12a or 12b, the feed table 17a or 17b is raised to push up the powder material 19, and the powder material 19 is supplied between the five blades 52a to 52e of the recoater 104. Like to do.

  Accordingly, since the powder material 19 to be conveyed can be distributed and arranged between the blades, the amount of the powder material 19 carried by one blade can be reduced.

  Thereby, while moving the recoater 104 to convey the powder material 19, the amount of the powder material 19 that accumulates in front of one blade 52a-52e, and hence its weight, can be reduced.

  For this reason, it is possible to prevent a large load from being partially applied to the lower layer while the powder material 19 is being transported in the thin layer forming container 11. As a result, it is possible to prevent the displacement of the bonding layer 19b formed in the lower layer and perform normal modeling.

  As described above, the powder bed fusion bonding method using the recoater 104 of the present invention is effective particularly when the bonding layer 19b is laminated without being fixed to the base.

  Although the present invention has been described in detail with the embodiments, the scope of the present invention is not limited to the examples specifically shown in the above embodiments, and the scope of the above embodiments within the scope not departing from the gist of the present invention. Modifications are within the scope of this invention.

  For example, the horizontal width and interval of the blades 52a to 52e of the recoater 104 are not limited to the above-described numerical values. The powder material storage containers 12a and 12b can be changed as appropriate according to the size of the area for storing the powder material 19 therein.

  In addition, the lower ends of the blades 52b to 52d provided at the intermediate portion of the recoater 104 are made higher than the lower ends of the blades 52a and 52e provided at both ends, but the lower ends of all the blades 52a to 52e are the same. You may make it high.

  Further, although the blades 52a to 52e of the recoater 104 are arranged at equal intervals, some or all of them may be arranged at different intervals.

  Further, as shown in FIG. 4, the blades 52a and 52e at both ends of the recoater 104 are arranged on the opposing edges Ea and Eb of the powder material storage containers 12a and 12b, respectively. I can't.

  All the blades 52a to 52e may be disposed on the powder material 19.

  Alternatively, when the last blade 52a or 52e with respect to the moving direction is disposed on one of the opposing edges Ea and Eb of the powder material storage containers 12a and 12b, the remaining one or more blades 52b to 52e, Alternatively, 52a to 52d may be arranged on the powder material 19.

  Although the number of blades of the recoater 104 is five, two or more can be appropriately changed within a practical range.

  At this time, in particular, when the number of blades of the recoater 104 is two, the rear blade is arranged on one of the facing edges Ea and Eb of the powder material storage containers 12a and 12b with respect to the moving direction. Sometimes it is necessary for the front blade to be placed on the powder material 19.

  Finally, the invention described in the above embodiment is summarized as an appendix below.

(Appendix 1)
A transporting member that moves the upper surface of the thin layer forming portion to carry the powder material, and has the thin layer forming portion that forms a thin layer of the powder material;
The powder bed fusion bonding apparatus, wherein the conveying member has a plurality of horizontally long blades, and the blades face each other in a moving direction and are arranged at intervals.

(Appendix 2)
2. The powder bed fusion bonding apparatus according to claim 1, wherein at least a lower end portion of the last blade of the plurality of blades moves in contact with an upper surface of the thin layer forming portion with respect to the moving direction. .

(Appendix 3)
The powder bed fusion bonding apparatus according to appendix 1, further comprising an energy beam emitting unit that emits an energy beam for heating the thin layer of the powder material.

(Appendix 4)
The thin layer forming part is
A powder material storage container for storing the powder material;
The powder bed fusion bonding apparatus according to claim 1, further comprising a thin layer forming container that is placed side by side with the powder material storage container and forms a thin layer of the powder material.

(Appendix 5)
The powder material storage container has a lifting platform on which the powder material is placed on the bottom, and when the last blade of the plurality of blades in the moving direction is arranged at the edge of the powder material storage container The powder bed fusion bonding apparatus according to appendix 4, wherein the remaining one or more blades have a size to be disposed on the powder material.

(Appendix 6)
A control means;
The control means includes
Moving the conveying member to dispose the last blade on the edge of the powder material storage container containing the powder material, and disposing one or more remaining blades on the powder material; ,
Raising the elevator to push up the powder material and supplying between the blades;
The powder bed fusion bonding apparatus according to claim 5, further comprising a step of moving the conveying member and conveying the powder material while holding the powder material between the plurality of blades.

(Appendix 7)
Providing a conveying member having a plurality of horizontally long blades, each of the blades facing in the moving direction and arranged at a distance from each other;
Moving the conveying member over the powder material, pushing up the powder material and supplying it between the blades;
Moving the conveying member to carry the powder material while holding the powder material between the plurality of blades.

(Appendix 8)
The powder material is stored in a powder material storage container having a lifting platform for placing the powder material on the bottom,
In the powder material storage container, when the last blade of the plurality of blades with respect to the moving direction is arranged on the edge of the powder material storage container, the remaining one or more blades are placed on the powder material. The powder bed fusion bonding method according to appendix 7, wherein the powder bed fusion bonding method has a size arranged in the above.

(Appendix 9)
The step of moving the conveying member onto the powder material and pushing up the powder material and supplying it between the plurality of blades includes moving the conveying member to move the last blade to the powder material storage container. And placing the remaining one or more blades on the powder material, raising the lifting platform to push up the powder material, and supplying it between the plurality of blades 9. The powder bed fusion bonding method according to appendix 8, which is characterized by the following.

(Appendix 10)
After carrying the powder material,
Forming a thin layer of powder material;
The powder bed according to claim 7, further comprising: irradiating an energy beam to the thin layer of the powder material, melting and bonding the thin layer of the powder material, and solidifying to form a bonded layer. Melt bonding method.

(Appendix 11)
The step of forming the thin layer of the powder material is a step of forming the thin layer of the powder material by leveling the surface while moving the conveying member and bringing the powder material into the thin layer forming container. The powder bed fusion bonding method according to appendix 10, characterized by:

(Appendix 12)
Additional remark 11 characterized in that at least a lower end portion of the blade at the rearmost part of the plurality of blades moves in contact with upper surfaces of the powder material storage container and the thin layer forming container. Powder bed melt bonding method.

11 ... Thin layer forming container, 12a ... First powder material storage container, 12b ... Second powder material storage container, 13a ... Left flange, 13b ... Right flange, 14a, 14b ...・ Heater, 15 ・ ・ Part table (first elevator), 16, 18a, 18b ・ ・ ・ Support shaft, 17a ・ ・ ・ First feed table (second elevator), 17b ・ ・ ・ Second feed table (third Elevating platform), 19 ... Powder material, 19a ... Thin layer (or thin layer) of powder material, 19b ... Binding layer, 20 ... Laser light, 51a, 51b ... Reinforcement material, 52a-52e ... Blade, 53a-53c ... Support member, 101 ... Laser light emitting part (energy beam emitting part), 102 ... Thin layer forming part, 103 ... Control part (control means), 104, 105 ... Recoater (conveying member), Ea, Eb ... Powder material storage container Edges facing each other in the width direction.

Claims (6)

A powder material storage container for storing the powder material;
A thin layer forming container that is placed side by side with the powder material storage container to form a thin layer of the powder material;
Moving the powder material storage container and the upper surface of the thin layer forming container, and having a conveying member for carrying the powder material,
The powder bed fusion bonding apparatus, wherein the conveying member has a plurality of horizontally long blades, and the blades face each other in a moving direction and are arranged at intervals.   2. The powder bed fusion bonding apparatus according to claim 1, further comprising an energy beam emitting unit that emits an energy beam for heating the thin layer of the powder material.   2. The lower end portion of the blade at the rearmost part of the plurality of blades in the moving direction moves in contact with the upper surfaces of the powder material storage container and the thin layer forming container. The powder bed melt bonding apparatus as described.   The powder material storage container has a lifting platform on which the powder material is placed on the bottom, and when the last blade of the plurality of blades in the moving direction is arranged at the edge of the powder material storage container The powder bed melt bonding apparatus of claim 1, wherein the remaining one or more blades are sized to be disposed on the powder material. A control means;
The control means includes
Moving the conveying member to dispose the last blade on the edge of the powder material storage container containing the powder material, and disposing one or more remaining blades on the powder material; ,
Raising the elevator to push up the powder material and supplying between the blades;
The powder bed fusion bonding apparatus according to claim 4, further comprising a step of moving the conveying member and conveying the powder material in a state where the powder material is held between the plurality of blades. Providing a conveying member having a plurality of horizontally long blades, each of the blades facing in the moving direction and arranged at a distance from each other;
Moving the conveying member over the powder material, pushing up the powder material and supplying it between the blades;
Moving the conveying member to carry the powder material while holding the powder material between the plurality of blades.

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