JP2021520310A - 選択的付加製造装置のための磁気閉じ込め加熱デバイス - Google Patents
選択的付加製造装置のための磁気閉じ込め加熱デバイス Download PDFInfo
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Abstract
Description
−プラズマ閉じ込めアセンブリは、荷電粒子を閉じ込めるのに適するマグネトロンタイプのデバイスを含む;
−マグネトロンデバイスは、線形パターンに従って電子を閉じ込めるように構成された磁石の配置を含む;
−マグネトロンタイプのデバイスは、イオンのソースを形成するスリットを含み、スリットは、電極を通して形成され、粉末床に面して現れる;
−ガスが、スリットの中に注入される;
−プラズマ発生デバイスは、主変位構成要素を用いてそれが延びる方向に対して直角に変位されるようになっている;
−プラズマ発生デバイスのための電力供給ユニットは、直流及び/又は無線周波数及び/又はパルス高電圧のソースを含む。
−加熱する段階中に、プラズマ発生デバイスは、電極に給電する際の放電の形成を制御するために正確な場所に荷電粒子を閉じ込めて、プラズマと粉末床の間の熱伝達を最大にするために閉じ込められたプラズマを発生させる;
−加熱する段階中に、ガスが、プラズマ発生デバイスの中にそこでイオン化されるように注入され、磁場が、粉末に向けて配向された閉じ込められたプラズマジェットを発生させるためにイオン化ガスの噴霧を誘起する;
−少なくとも1つの加熱する段階は、硬化段階の前及び/又は後に実行される。
図1の選択的付加製造装置1は、3次元物体(図のモミの木の形態の物体2)を製造することを可能にする付加製造粉末(金属粉末、セラミック粉末など)の様々な層がその上に連続して堆積される水平板3のような支持体と、板3の上方に位置する粉末7のタンクと、例えば粉末の異なる連続層を広げる(双方向矢印Aによる変位)ための層化スクレーパー5又はローラーを含む板上に金属粉末を分配するための配置4と、広がった薄層の溶融(全体的又は部分的)のためのエネルギソースのセット8と、事前格納情報(メモリM)に従って装置1の異なる構成要素の駆動を保証する制御ユニット9と、層が堆積された時にデッキ3の支持体を下げること(双方向矢印Bによる変位)を可能にするための機構10とを含む。
−電子ビームガン11、及び
−レーザタイプのソース12
を含む。
図2に示す例では、加熱デバイス19は、金属粉末床(マイクロ又はナノ粉末から構成される固形又は粒状面21)の上方で変位されるプラズマ発生デバイス20を含む。
低圧プラズマ(<0.1mbar)を発生させるためにかつプラズマ発生デバイス20の効率を高めるために、このデバイスは、磁気プラズマ閉じ込めシステムを含む。
磁石の配置25は、従って、決定されたゾーンに電子を集中させる磁場を発生させるように構成される。説明した例では、それは線形パターン29であるが、磁石は、円又は曲線のようないずれかの他の幾何学モデルを形成するように配置することができると考えられる。
電極と粉末床の間のプラズマの形成は、長期に及ぶ活性化の場合に電極の有意な加熱を引き起こす。
変形マグネトロンカソードは、線形及び均質プラズマを得ることも可能にする。
20 プラズマ発生デバイス
21 粉末床の面
22 励振ソース
23 マグネトロンデバイス
Claims (13)
- 付加製造装置内で粉末床を加熱するためのデバイスであって、
当該デバイスが、
プラズマ発生デバイス(20)であって、当該デバイスが、その上でプラズマの発生を可能にする前記粉末床からの距離で、該粉末床の上方に位置決めされ、かつ変位されるようになったプラズマ発生デバイス(20)と、
前記プラズマ発生デバイスのための電力供給ユニット(22)と、
前記電力供給と前記プラズマ発生デバイスの前記変位とを制御するための制御ユニット(9)と、
を含み、かつ
前記プラズマ発生デバイス(20)が、磁気プラズマ閉じ込めアセンブリを含む、
ことを特徴とするデバイス。 - 前記プラズマ閉じ込めアセンブリは、荷電粒子を閉じ込めるのに適するマグネトロンタイプのデバイス(23)を含むことを特徴とする請求項1に記載の加熱デバイス。
- 前記マグネトロンデバイス(23)は、線形パターン(29)に従って電子を閉じ込めるように構成された磁石の配置(25)を含むことを特徴とする請求項2に記載の加熱デバイス。
- 前記マグネトロンタイプのデバイス(23)は、イオンのソースを形成するスリット(30)を含み、該スリット(30)は、電極(24)を通して形成され、かつ前記粉末床に面して現れることを特徴とする請求項3に記載の加熱デバイス。
- ガスが、前記スリット(30)の中に注入されることを特徴とする請求項4に記載の加熱デバイス。
- 前記プラズマ発生デバイス(20)は、主変位構成要素を用いてそれが延びる方向に対して直角に変位されるようになっていることを特徴とする請求項1から請求項5のいずれか1項に記載の加熱デバイス。
- 前記プラズマ発生デバイス(20)のための前記電力供給ユニット(22)は、高い直流及び/又は無線周波数及び/又はパルス電圧のソースを含むことを特徴とする請求項1から請求項6のいずれか1項に記載の加熱デバイス。
- 選択的付加製造によって3次元物体を製造するための装置であって、
筐体内に、
付加製造粉末の連続層の堆積のための支持体(3)と、
前記支持体(3)上の又は事前に硬化された層上に粉末の層を付加するのに適切な分配配置(4)と、
前記分配配置(4)によって付加された粉末の層の選択的硬化に適切な少なくとも1つの電源(8)と、
を含み、
前記装置が、
請求項1から請求項7のいずれか1項に記載の加熱デバイス(19)、
を含み、
前記加熱デバイス(19)のプラズマ発生デバイス(20)が、粉末床の上方でプラズマのその上への発生を可能にする該粉末床からの距離に位置決めされて変位されるようになっており、
前記プラズマ発生デバイス(20)は、磁気プラズマ閉じ込めアセンブリも含む、
ことを特徴とする装置。 - 前記分配配置(4)は、層化スクレーパー(5)又はローラーを含み、前記プラズマ発生デバイス(20)は、該スクレーパー(5)又はローラーの近位に延び、かつそれと共に可動である又は独立に変位されることを特徴とする請求項8に記載の装置。
- 選択的付加製造による3次元物体を製造する方法であって、
支持体(3)又は事前に固化された層上の粉末の層の堆積と、
電源(8)により実行される前記事前に堆積された層の少なくとも1つのゾーンの硬化と、
の段階を含み、
前記方法が、
請求項1から請求項7のいずれか1項に記載の加熱デバイス(19)を用いて前記粉末の層の少なくとも1つの局在化されたゾーンを加熱する作動、
も含み、
前記粉末床の前記加熱は、閉じ込められたプラズマによって実行される、
ことを特徴とする方法。 - 前記加熱する段階中に、前記プラズマ発生デバイス(20)は、電極(24)を給電する際の放電の形成を制御するために正確な場所内に荷電粒子を閉じ込め、前記プラズマと前記粉末床の間の熱伝達を最大にするように閉じ込められたプラズマを発生させることを特徴とする請求項10に記載の方法。
- 前記加熱する段階中に、ガスが、前記プラズマ発生デバイス(20)の中にそこでイオン化されるように注入され、磁場が、前記粉末に向けて配向された閉じ込められたプラズマジェットを発生させるために該イオン化されたガスの噴霧を誘起することを特徴とする請求項10及び請求項11のいずれか1項に記載の方法。
- 少なくとも加熱する段階が、前記硬化する段階の前及び/又は後に実行されることを特徴とする請求項10から請求項12のいずれか1項に記載の方法。
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PCT/FR2019/050809 WO2019193299A1 (fr) | 2018-04-06 | 2019-04-05 | Dispositif de chauffage a confinement magnétique pour appareil de fabrication additive sélective |
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