JP5108884B2 - 3次元物体を生成する方法および装置 - Google Patents
3次元物体を生成する方法および装置 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 54
- 239000000843 powder Substances 0.000 claims description 132
- 238000010894 electron beam technology Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 9
- 238000007711 solidification Methods 0.000 claims description 9
- 230000008023 solidification Effects 0.000 claims description 9
- 238000009825 accumulation Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
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- 239000002245 particle Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000008571 general function Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
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- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/141—Processes of additive manufacturing using only solid materials
- B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/362—Process control of energy beam parameters for preheating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/366—Scanning parameters, e.g. hatch distance or scanning strategy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Powder Metallurgy (AREA)
Description
図1は3次元生成物を生成する従来の装置1の実施例を表している。装置1は、3次元生成物3が積み重ねられる垂直方向に調整可能である作業台2と、1台以上の粉末ディスペンサ4と、粉末ベッド5を形成するために作業台2上に粉末の薄層を分布するように工夫されている手段28と、粉末ベッド5の複数の部分を互いに融合するようにエネルギーを粉末ベッド5に届ける電子銃の形をしている放射線銃6と、上記作業台2の上で放射線銃6によって放出された電子ビームを導く偏向コイル7と、装置1の種々の部分を制御するように工夫されている制御ユニット8とを備える。典型的な作業サイクルでは、作業台2が下げられ、新しい粉末の層が粉末ベッド5に塗布され、電子ビームが粉末ベッド5の上層5’の選択された部分の上に走査される。主として、このサイクルは、生成物が仕上がるまで繰り返される。当該分野の専門家は、図1に概要が説明されたタイプと、電子銃の代わりにレーザー銃を装備している装置の両方に関して、3次元生成物を生成する装置の一般的な機能および構成に精通している。
tp=t0−kr*r
に設定され得る。ここで、t0はビームがt=0であったときと同じ位置へ戻ることができるまでに経過すべき時間であり、rはt=0であったときのビーム位置とtであったときの新しいビーム位置との間の距離であり、krは比例係数である。ここで、tpは0とt0との間の値を取ることが仮定され、累積効果は十分に大きなrの値に対し無視できると考えられることを意味している。
Vs=ビーム走査速度、
I0=初期ビーム電流、
ΔI=予熱エリア10の再走査と再走査の間のビーム電流増加、
Nr=予熱エリア10が走査される回数、
ΔY=連続的に走査される2本のパスの間の距離、すなわち、最小安全距離、および、
δY=隣接した2本のパスの距離、すなわち、中間距離
所与の粉末層エリアに対し、すなわち、Lx、Lyの値が与えられている場合に、問題になっている粉末エリアの適切な予熱のため必要とされるVs、I0、ΔI、Nr、ΔYおよびδYの値を経験的に取得することが可能である。
kr=(t0−Lx/Vs)/ΔY、
k1=I0/Vs、
k2=ΔI/Vs、および、
k3=(I0+Nr・ΔI)・Nr/(Vs・δY・2)
式中、t0は、ビームが前に走査されたパスの直近に戻る前に経過することが許されるべき最小期間であり(すなわち、t0はビームが、たとえば、線PM.Nから線PM.N+1へ戻ることができる前に経過すべき期間であり)、krは前に走査されたパスから距離ΔYにあるビームがx=0へ戻る前に経過すること許されるべき期間を決定するため使用される倍率であり、k1は予熱エリア10の1回目の走査中にパスの単位mm当たりに堆積した最大電荷量に比例し、k2は予熱エリア10の再走査毎に単位mm当たりの最大電荷堆積増加に比例し、k3は粉末表面をある特定の温度に保つため必要とされる単位mm2当たりの平均エネルギー堆積に比例する。
Claims (11)
- 高エネルギーの電子ビームを照射することにより凝固され得る粉末材料(5)を使用して層毎に3次元物体(3)を生成する方法において、
前記粉末材料(5)を均一に予熱するという一般的な目的を有する予熱ステップと、
前記予熱ステップの後に前記粉末材料を融合させるという一般的な目的を有する凝固ステップと、
を備え、
前記予熱ステップが、予熱粉末層エリア(10)の上に分布されたパス(P1.1−P5.20)に沿って前記ビームを走査することにより前記予熱粉末層エリア(10)を走査するサブステップを備え、
連続的に走査されるパス(PM.N,P(M+1).N)が少なくとも最小安全距離(ΔY)で分離され、前記最小安全距離(ΔY)は前記予熱粉末層エリア(10)内における、前記連続的に走査されるパスからの望ましくない電荷累積効果を防止するために適した距離である、ことを特徴とする方法。 - 前記予熱ステップが前記予熱粉末層エリア(10)を再走査するサブステップを更に備えることを特徴とする請求項1に記載の方法。
- 前記予熱粉末層エリア(10)の再走査中に辿られる前記パスが、前記予熱粉末層エリア(10)の前の走査中に辿られた前記パスに対して中間距離(δY)だけ変位されており、前記中間距離(δY)は前記最小安全距離(ΔY)より短いことを特徴とする請求項2に記載の方法。
- 前記ビームのパワーが前記予熱ステップ中に増加されることを特徴とする請求項1〜3のいずれか一項に記載の方法。
- 前記電子ビームのパワーが前記予熱粉末層エリア(10)の連続的な走査と走査の間にまたは前記予熱粉末層エリア(10)の連続的な再走査と再走査の間に段階的に増加されることを特徴とする請求項2〜4のいずれか一項に記載の方法。
- 前記電子ビームのパワーは、前記電子ビームの電流を増加することにより増加されることを特徴とする請求項4または5に記載の方法。
- 前記パス(PM.N)が一方の端(x=0)から他方の端(x=Lx)まで走査されることを特徴とする請求項1〜6のいずれか一項に記載の方法。
- 前記パス(PM.N)が実質的に平行であることを特徴とする請求項1〜7のいずれか一項に記載の方法。
- 前記パス(PM.N)が実質的に直線を形成することを特徴とする請求項1〜8のいずれか一項に記載の方法。
- 前記予熱粉末層エリア(10)が、後続の前記凝固ステップで融合されるべき前記粉末層の対応する部分(3)より広く、該対応する部分(3)に関して安全マージン(12)を形成することを特徴とする請求項1〜9のいずれか一項に記載の方法。
- 高エネルギーのビームを照射することにより凝固され得る粉末材料(5)を使用して層毎に3次元物体(3)を生成する装置(1)において、
請求項1〜10のいずれか一項に記載の方法に従って作動されるように構成されていることを特徴とする装置。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/SE2006/000917 WO2008013483A1 (en) | 2006-07-27 | 2006-07-27 | Method and device for producing three-dimensional objects |
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JP2009544501A JP2009544501A (ja) | 2009-12-17 |
JP5108884B2 true JP5108884B2 (ja) | 2012-12-26 |
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US (2) | US8187521B2 (ja) |
EP (1) | EP2049289B1 (ja) |
JP (1) | JP5108884B2 (ja) |
KR (1) | KR101271243B1 (ja) |
CN (1) | CN101479064B (ja) |
WO (1) | WO2008013483A1 (ja) |
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US11077613B2 (en) | 2016-09-02 | 2021-08-03 | Technology Research Association For Future Additive Manufacturing | Three-dimensional laminating and shaping apparatus, control method of three-dimensional laminating and shaping apparatus, and control program of three-dimensional laminating and shaping apparatus |
US12005635B2 (en) | 2017-09-06 | 2024-06-11 | Ihi Corporation | Three-dimensional shaping device and three-dimensional shaping method |
WO2019088114A1 (ja) * | 2017-10-31 | 2019-05-09 | 株式会社Ihi | 三次元造形装置及び三次元造形方法 |
US11780159B2 (en) | 2017-10-31 | 2023-10-10 | Ihi Corporation | Additive manufacturing device and additive manufacturing method |
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EP2049289A4 (en) | 2012-07-04 |
US20120211926A1 (en) | 2012-08-23 |
CN101479064A (zh) | 2009-07-08 |
US20100007062A1 (en) | 2010-01-14 |
EP2049289B1 (en) | 2014-04-30 |
WO2008013483A1 (en) | 2008-01-31 |
CN101479064B (zh) | 2011-08-31 |
EP2049289A1 (en) | 2009-04-22 |
JP2009544501A (ja) | 2009-12-17 |
US8187521B2 (en) | 2012-05-29 |
KR20090049576A (ko) | 2009-05-18 |
KR101271243B1 (ko) | 2013-06-07 |
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