JPWO2018211594A1 - 付加加工用ヘッドおよび加工機械 - Google Patents
付加加工用ヘッドおよび加工機械 Download PDFInfo
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- B23K26/21—Bonding by welding
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- B23K26/34—Laser welding for purposes other than joining
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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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
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- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
Description
(a)粉末床溶融法と比較して、材料粉末を高速で堆積することができる。
(b)複数の材料粉末を、同時に堆積することができる。
(c)ベースとなる材料とは異なる種類の材料粉末が供給されることにより、堆積される材料を被覆することができる。
(d)付加加工用ヘッドを広域で移動させることにより、大きいサイズのワークに対して付加加工を行なうことができる。
(e)材料粉末を部分的に堆積させることが可能であるため、指向性エネルギー堆積法を用いて、金型やブレードなどを修復するプロセスに利用することができる。
(a)材料粉末の堆積精度が、粉末床溶融法よりも劣る。
(b)レーザ出力、材料粉末供給量、キャリアガス供給量および送り速度など、プロセスのパラメータの組み合わせが、複雑である。そのことが、これらパラメータの最適化を困難としている。
(a)材料粉末が高価であるため、加工チャンバに積もった材料粉末を集める装置が必要となる。集められなかった材料粉末は、廃棄されることになる。
(b)加工チャンバのメンテナンスが困難になる。材料粉末がガイドのような機構に侵入した場合、加工機械の故障の原因となる。
(c)アルミニウムのような材料粉末は、適切な処理が必要となる。
Claims (5)
- ワークに対して材料粉末を供給するとともにレーザ光を照射することにより、付加加工を行なう付加加工用ヘッドであって、
レーザ光の光軸方向において対向して配置される第1アキシコンレンズおよび第2アキシコンレンズと、前記第1アキシコンレンズおよび前記第2アキシコンレンズの間に配置される凸レンズとを有し、前記第1アキシコンレンズに入射されたレーザ光をリング状にして前記第2アキシコンレンズより出射するリング状レーザ光形成部と、
前記凸レンズをレーザ光の光軸方向に移動させる第1移動機構部と、
リング状レーザ光をワークに向けて出射するレーザ光出射部と、
前記レーザ光出射部から出射されるリング状レーザ光の内側に配置され、材料粉末を排出する排出口を有し、前記排出口からワークに向けて材料粉末を供給する材料供給部とを備える、付加加工用ヘッド。 - 前記排出口およびワークの間の距離が変化するように、前記材料供給部を移動させる第2移動機構部をさらに備える、請求項1に記載の付加加工用ヘッド。
- ワークの付加加工が可能な加工機械であって、
請求項1または2に記載の付加加工用ヘッドと、
前記付加加工用ヘッドおよびワークの少なくともいずれか一方を移動させる第3移動機構部と、
前記第1移動機構部による前記凸レンズの移動、ならびに、前記第3移動機構部による前記付加加工用ヘッドおよびワークの少なくともいずれか一方の移動を制御する制御装置とを備え、
前記制御装置は、
ワークおよび前記レーザ光出射部間の距離、ならびに、レーザ光の光軸方向における前記第1アキシコンレンズおよび前記凸レンズ間の距離と、ワーク上に形成されるレーザ光の照射領域の大きさとの関係に関するデータを記憶する記憶部と、
ワーク上に形成するレーザ光の照射領域の大きさを特定し、特定したレーザ光の照射領域を前記記憶部に記憶されたデータに照らし合わせることにより、ワークおよび前記レーザ光出射部間の距離、ならびに、レーザ光の光軸方向における前記第1アキシコンレンズおよび前記凸レンズ間の距離を決定する制御部とを含む、加工機械。 - 前記リング状レーザ光形成部に向かうレーザ光を発振するレーザ光発振装置をさらに備え、
前記制御装置は、前記レーザ光発振装置において発振するレーザ光の出力をさらに制御し、
前記制御部は、レーザ光の照射領域を変化させた場合に、レーザ光の照射領域の単位面積当たりのエネルギー密度およびメルトプールの温度が一定となるように、レーザ光の出力を決定する、請求項3に記載の加工機械。 - 半径方向におけるリング状レーザ光の厚みは、レーザ光の光軸方向における前記第1アキシコンレンズおよび前記凸レンズ間の距離が増大するのに従って、極小値に向けて徐々に減少する第1区間と、極小値から徐々に増大する第2区間とを有するように変化し、
前記第2区間におけるリング状レーザ光の厚みの変化の割合は、前記第1区間におけるリング状レーザ光の厚みの変化の割合よりも小さく、
前記制御部は、前記記憶部に記憶されたデータに基づき、前記第2区間の範囲内において、レーザ光の光軸方向における前記第1アキシコンレンズおよび前記凸レンズ間の距離を決定する、請求項3または4に記載の加工機械。
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CN110545947B (zh) * | 2017-04-19 | 2021-05-28 | 沃尔沃卡车集团 | 具有用于接触钎焊焊丝并与检测器相关联地阻挡激光束的第一部分的夹具的激光钎焊系统、监测激光钎焊系统的方法 |
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EP3626383B1 (en) | 2023-09-06 |
EP3626383C0 (en) | 2023-09-06 |
US11135772B2 (en) | 2021-10-05 |
EP3626383A1 (en) | 2020-03-25 |
EP3626383A4 (en) | 2020-12-16 |
JP6535821B2 (ja) | 2019-06-26 |
WO2018211594A1 (ja) | 2018-11-22 |
US20190270246A1 (en) | 2019-09-05 |
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