JP2021143405A - 付加造形装置および付加造形装置の制御方法 - Google Patents
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- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
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- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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Abstract
Description
なお、本発明は上記の実施例に限られず、種々の変形、応用が可能なものである。上述した実施例は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されない。
2…金属粉末
3…溶融池
4…造形面
5…造形物
7…使用済み金属粉末
10…造形空間
20…供給タンク(粉末供給装置)
22…供給機構(粉末供給装置)
24…リコータ(粉末供給装置)
26…造形タンク(粉末供給装置)
28…回収タンク
30…レーザシステム(ビーム照射装置)
32…レーザスキャナ
34…レーザ発振器
36…第1温度計(温度測定装置)
40…レーザシステム(ビーム照射装置)
42…レーザスキャナ
44…レーザ発振器
46…第1温度計(温度測定装置)
50…第2温度計(温度測定装置)
60…第3温度計
70…制御装置
72…照射領域熱伝導率解析部
74…供給装置制御部
76…レーザシステム制御部
Claims (13)
- 粉末を造形面に供給する粉末供給装置と、
前記造形面に供給された前記粉末の所定の位置の粉末を溶融させるビーム照射装置と、
造形面の各領域の温度変化を測定する温度測定装置と、
前記ビーム照射装置を制御する制御装置と、を備え、
前記制御装置は、前記造形面のビーム照射後の温度変化に基づいて次層のビーム照射条件を決定する
ことを特徴とする付加造形装置。 - 請求項1に記載の付加造形装置において、
前記制御装置は、前記温度測定装置で測定された前記造形面の温度変化の測定結果と表面から任意の積層数の造形容積とから造形物の熱伝導率を解析し、前記熱伝導率も用いて次層のビーム照射条件を決定する
ことを特徴とする付加造形装置。 - 請求項1に記載の付加造形装置において、
前記制御装置は、前記ビーム照射条件として、ビームの出力、ビームの走査速度、ビームのハッチディスタンスのうち少なくともいずれか一つの条件の決定する
ことを特徴とする付加造形装置。 - 請求項1に記載の付加造形装置において、
前記制御装置は、前記ビーム照射条件として、待機時間、前記粉末供給装置による前記粉末の供給厚さも決定する
ことを特徴とする付加造形装置。 - 請求項1に記載の付加造形装置において、
前記ビーム照射装置は、出力の異なる複数のビームを有している
ことを特徴とする付加造形装置。 - 請求項5に記載の付加造形装置において、
前記制御装置は、前記造形面の温度変化の測定結果と表面から任意の積層数の造形容積とから造形物の熱伝導率を解析し、前記熱伝導率が基準値より悪いと解析された領域の次層のビーム照射時は出力の小さい側のビームを用いる
ことを特徴とする付加造形装置。 - 請求項6に記載の付加造形装置において、
前記制御装置は、超過率に応じて当該領域の次層のビーム照射時の入熱を減少させる
ことを特徴とする付加造形装置。 - 請求項5に記載の付加造形装置において、
前記制御装置は、前記造形面の温度変化の測定結果と表面から任意の積層数の造形容積とから造形物の熱伝導率を解析し、前記熱伝導率が前記基準値以上であると解析された領域の次層のビーム照射時は出力が大きい側のビームを用いる
ことを特徴とする付加造形装置。 - 請求項8に記載の付加造形装置において、
前記制御装置は、超過率に応じて当該領域の次層のビーム照射時の入熱を増加させる
ことを特徴とする付加造形装置。 - 請求項1に記載の付加造形装置において、
前記制御装置は、前記温度測定装置で測定された前記造形面の温度変化の測定結果を基準値と比較し、前記測定結果が前記基準値より高い領域については、当該領域の次層の形成を省略する
ことを特徴とする付加造形装置。 - 付加造形により造形物を製造するための付加造形装置の制御方法であって、
粉末を造形面に供給する粉末供給工程と、
前記粉末供給工程によって供給された前記粉末にビームを照射して、前記粉末のうち前記造形物を構成する部分の粉末を溶融させるビーム照射工程と、
前記ビーム照射工程によるビーム照射後の造形面の温度変化を測定する温度測定工程と、
前記温度測定工程で測定された前記造形面のビーム照射後の温度変化に基づいて次層でのビーム照射条件を決定する照射条件決定工程と、を有する
ことを特徴とする付加造形装置の制御方法。 - 請求項11に記載の付加造形装置の制御方法において、
前記照射条件決定工程では、前記温度測定工程における測定結果において温度変化が基準値以下であると判断されたときは、超過率に応じて当該領域の次層のビーム照射時の入熱を減少させる
ことを特徴とする付加造形装置の制御方法。 - 請求項11に記載の付加造形装置の制御方法において、
前記照射条件決定工程では、前記温度測定工程における測定結果において温度変化が基準値より大きいと判断されたときは、超過率に応じて当該領域の次層のビーム照射時の入熱を増加させる
ことを特徴とする付加造形装置の制御方法。
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