JP6921920B2 - 溶融プール監視システム及びマルチレーザ付加製造プロセスにおけるエラー検出方法 - Google Patents
溶融プール監視システム及びマルチレーザ付加製造プロセスにおけるエラー検出方法 Download PDFInfo
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Description
Claims (15)
- 複数のエネルギー源(120)を利用する、粉末床付加製造プロセスを監視する方法(300)であって、
付加製造装置の粉末床に付加材料層を堆積することと、
前記付加材料層の第1の焦点(174)に向けて第1のエネルギー源(250)からエネルギーを選択的に指向させることと、
同時に、前記付加材料層の第2の焦点(174)に向けて第2のエネルギー源(120)からエネルギーを選択的に指向させることと、
溶融プール監視システム(200)を用いて、前記粉末床の前記第1の焦点(174)からの原放出信号を測定することと、
補償放出信号を取得するために、前記原放出信号と前記第2のエネルギー源(120)の動作との相互作用に少なくとも部分的に基づいて前記原放出信号を修正することと、
前記補償放出信号が所定の信号閾値を超える、前記補償放出信号からの外れ値放出を識別することと、
外れ値放出の識別に応答してアラートを生成することと、
を含む方法(300)。 - 前記補償放出信号を取得するために前記原放出信号を修正することが、
前記第1の焦点(174)と前記第2の焦点(174)の間の相対的方向と距離を表す位置ベクトル(280)である、前記第1の焦点(174)と前記第2の焦点(174)の間の位置ベクトル(280)を判定することと、
前記粉末床の前記第2の焦点(174)からの第2の放出信号を測定することと、
前記第2の放出信号と前記位置ベクトル(280)に少なくとも部分的に基づいて前記原放出信号を修正することと、
を含む、請求項1に記載の方法(300)。 - 前記補償放出信号を取得するために前記原放出信号を修正することが、
前記第1のエネルギー源(250)と前記第2のエネルギー源(120)の間の相対的軌道を判定することと、
前記粉末床の前記第2の焦点(174)からの、第2の放出信号を測定することと、
前記第2の放出信号と、前記第1のエネルギー源(250)と前記第2のエネルギー源(120)の相対的軌道とに少なくとも部分的に基づいて、前記原放出信号を修正することと、
を含む、請求項1又は請求項2に記載の方法(300)。 - 前記相対的軌道は、前記第1のエネルギー源(250)の第1の軌道(282)と、前記第2のエネルギー源(120)の第2の軌道(284)との差であり、
前記第1の軌道(282)と前記第2の軌道(284)のそれぞれは、焦点(174)の絶対位置と、前記焦点(174)の命令されたツール経路と、前記命令されたツール経路に沿う前記焦点(174)の推定速度とを含む、請求項3に記載の方法(300)。 - 前記第1の軌道(282)は、以前のタイムスタンプ、前記第1の焦点(174)の以前の位置、現在のタイムスタンプ、及び前記第1の焦点(174)の現在の位置に少なくとも部分的に基づいて算出される、請求項4に記載の方法(300)。
- 前記相対的軌道は、付加製造プロセスを促進するために使用される、命令されたツール経路(256)を画定する走査モデルに少なくとも部分的に基づいて決定される、請求項3〜請求項5のいずれか一項に記載の方法(300)。
- 前記補償放出信号を取得するために前記原放出信号を修正することが、前記原放出信号の修正に使用される放出補正因子を決定することを含む、請求項1〜請求項6のいずれか一項に記載の方法(300)。
- 前記放出補正因子は、前記第1の焦点(174)と前記第2の焦点(174)の間の相対位置と、前記第1のエネルギー源(250)と前記第2のエネルギー源(120)の相対的軌道と、前記粉末床上を通過するパージガス(270)の流れベクトル(286)のうちの少なくとも1つの関数である、請求項7に記載の方法(300)。
- 前記放出補正因子は、前記第2のエネルギー源(120)により生成される第2の溶融プール(262)から放出されるエネルギー又は副産物が、前記第1のエネルギー源(250)により生成される第1の溶融プール(252)から放出される光又は副産物として測定される確率である、請求項7又は請求項8に記載の方法(300)。
- 第3のエネルギー源(120)からのエネルギーを前記付加材料層の第3の焦点(174)に向けて選択的に指向させることをさらに備え、補償放出信号を取得することが、前記原放出信号と、前記第3のエネルギー源(120)の動作との相互作用に少なくとも部分的に基づいて、前記原放出信号を修正することを含む、請求項1〜請求項9のいずれか一項に記載の方法(300)。
- 前記原放出信号は、少なくとも1つの軸上溶融プール(176)センサによって取得される、請求項1〜請求項10のいずれか一項に記載の方法(300)。
- 前記補償放出信号を取得するために前記原放出信号を修正することが、
軸外溶融プール(176)センサを用いて粉末床放出信号を測定することと、
前記粉末床放出信号に少なくとも部分的に基づいて前記原放出信号を修正することと、
をさらに含む、請求項1〜請求項11のいずれか一項に記載の方法(300)。 - 付加製造装置であって、
前記付加製造装置の粉末床上に付加材料層を堆積させるための粉末(142)堆積システム(100)と、
前記付加材料層の第1の焦点(174)に向けて第1のエネルギービーム(122)を選択的に指向させるための第1のエネルギー源(250)と、
前記付加材料層の第2の焦点(174)に向けて第2のエネルギービーム(122)を同時に選択的に指向させるための第2のエネルギー源(120)と、
前記粉末床から放出される電磁エネルギーを測定するための溶融プール監視システム(200)と、
溶融プール監視システム(200)に動作可能に結合されたコントローラ(220)であって、
前記第1のエネルギービーム(122)によって前記第1の焦点(174)に形成される第1の溶融プール(252)から放出される第1の放出信号を測定し、
前記第2のエネルギービーム(122)によって前記第2の焦点(174)に形成される第2の溶融プール(262)から放出される第2の放出信号を測定し、
補償放出信号を取得するために、前記第2の放出信号に少なくとも部分的に基づいて前記第1の放出信号を修正し、
前記補償放出信号が所定の信号閾値を超える外れ値放出を識別し、
外れ値放出の識別に応答してアラートを生成する、
ように構成されたコントローラ(220)と、
を備える付加製造装置。 - 前記第1の放出信号を修正することが、
前記第1の焦点(174)と前記第2の焦点(174)の間の相対的方向と距離を表す位置ベクトル(280)である、前記第1の焦点(174)と前記第2の焦点(174)の間の位置ベクトル(280)を判定することと、
前記第2の放出信号と前記位置ベクトル(280)に少なくとも部分的に基づいて前記第1の放出信号を修正することと、
を含む、請求項13に記載の付加製造装置。 - 前記第1の放出信号を修正することが、
前記第1のエネルギー源(250)と前記第2のエネルギー源(120)の間の相対的軌道を判定することと、
前記第2の放出信号と、前記第1のエネルギー源(250)と前記第2のエネルギー源(120)の相対的軌道とに少なくとも部分的に基づいて、前記第1の放出信号を修正することと、
を含む、請求項13に記載の付加製造装置。
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US16/662,662 US11534961B2 (en) | 2018-11-09 | 2019-10-24 | Melt pool monitoring system and method for detecting errors in a multi-laser additive manufacturing process |
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US8728387B2 (en) * | 2005-12-06 | 2014-05-20 | Howmedica Osteonics Corp. | Laser-produced porous surface |
US11073501B2 (en) * | 2015-11-13 | 2021-07-27 | Honeywell Federal Manufacturing & Technologies, Llc | System and method for inspecting parts using dynamic response function |
US11839914B1 (en) | 2019-01-31 | 2023-12-12 | Freeform Future Corp. | Process monitoring and feedback for metal additive manufacturing using powder-bed fusion |
FR3112602B1 (fr) * | 2020-07-20 | 2023-04-07 | Office National Detudes Rech Aerospatiales | Dispositif de contrôle pour fabrication d’une piece avec ajout de matiere |
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