JP6520232B2 - 金属部材のレーザ加工方法 - Google Patents
金属部材のレーザ加工方法 Download PDFInfo
- Publication number
- JP6520232B2 JP6520232B2 JP2015043577A JP2015043577A JP6520232B2 JP 6520232 B2 JP6520232 B2 JP 6520232B2 JP 2015043577 A JP2015043577 A JP 2015043577A JP 2015043577 A JP2015043577 A JP 2015043577A JP 6520232 B2 JP6520232 B2 JP 6520232B2
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- Prior art keywords
- laser processing
- metal member
- laser
- processing method
- perforated
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
- B29C66/7428—Transition metals or their alloys
- B29C66/74281—Copper or alloys of copper
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
- B29C66/7428—Transition metals or their alloys
- B29C66/74283—Iron or alloys of iron, e.g. steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0079—Liquid crystals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2012/00—Frames
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3431—Telephones, Earphones
- B29L2031/3437—Cellular phones
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Description
図1は、本実施形態に係る接合構造体1における接合部を模式的に示す拡大断面図である。この接合構造体1は、本実施形態に係るレーザ加工方法を用いて加工された金属部材2と、樹脂部材3とが接合されたものである。接合構造体1における金属部材2と樹脂部材3との接合界面を構成する金属部材2の表面部には、レーザ光を照射することによって、当該金属部材2の表面で開口する穿孔部4が形成されている。そうして、この接合構造体1では、溶融または軟化した状態で穿孔部4に充填された樹脂部材3が、穿孔部4内で固化することで、金属部材2と樹脂部材3とが接合されている。
上記接合構造体1における金属部材2には、図1に示すように、平板状の部位2aに形成された穿孔部4の近傍に折り曲げ部5が設けられている。以下、平板状の部位2aにおける穿孔部4の近傍にこのような折り曲げ部5を設ける理由について説明する。
金属部材2を構成する金属材料の一例としては、鉄系金属、ステンレス系金属、銅系金属、アルミニウム系金属、マグネシウム系金属およびそれらの合金が挙げられる。また、金属部材2は、金属成型体であってもよく、亜鉛ダイカスト、アルミダイカスト、粉末冶金等であってもよい。なお、後述する他の実施形態および変形例における金属部材12,22,32,42,52,62,72についても、金属部材2を構成する金属材料と同じ金属材料を適用することができる。
穿孔部4は、例えば、加工用のレーザ光が照射されることによって形成される。レーザの種類としては、パルス発振が可能なものが好ましく、ファイバレーザ、YAGレーザ、YVO4レーザ、半導体レーザ、炭酸ガスレーザ、エキシマレーザが選択でき、レーザ光の波長を考慮すると、ファイバレーザ、YAGレーザ、YAGレーザの第2高調波、YVO4レーザ、半導体レーザが好ましい。
金属部材2と樹脂部材3とを接合する際には、例えば、金属部材2と樹脂部材3とを重ねた状態で金属部材2の表面にレーザ光を照射して樹脂部材3を溶融または軟化させたり(レーザ照射)、金属部材2を金型(図示せず)にセットして溶融した樹脂部材3を射出したり(射出成型)することにより、樹脂部材3を穿孔部4に充填する。そうして、穿孔部4に充填された樹脂部材3が、穿孔部4内で固化することによって、金属部材2と樹脂部材3とが接合され、図1に示すような接合構造体1が形成される。なお、金属部材2と樹脂部材3とは熱プレスによって接合してもよい。
本実施形態は、折り曲げ部15の形状が上記実施形態1と異なるものである。以下、実施形態1と異なる点を中心に説明する。
次に、上記実施形態1および2の変形例について説明する。
本変形例は、レーザ加工部26,36を挟んだ両側に折り曲げ部25,35が形成されている点が、上記実施形態1および2と異なるものである。以下、実施形態1および2と異なる点を中心に説明する。
本変形例は、レーザ加工部46,56の近傍にT字状部45,55が形成されている点が、上記実施形態1および2と異なるものである。以下、実施形態1および2と異なる点を中心に説明する。なお、T字状部45,55は、厳密には「折り曲げ部」ではないが、断面二次モーメントが大きくなるようなコーナ部を有する形状の変形例として、便宜上ここで説明する。
本実施形態は、レーザ加工部66の近傍部に、折り曲げ部5,15ではなく凹凸部65を形成する点が、上記実施形態1および2と異なるものである。以下、実施形態1および2と異なる点を中心に説明する。
次に、上記実施形態3の変形例について説明する。
本変形例は、レーザ加工部76に凹凸部75が形成されている点が、上記実施形態3と異なるものである。以下、実施形態3と異なる点を中心に説明する。
次に、上記実施形態1、2および3に係るレーザ加工方法の効果を確認するために行った実験例について説明する。
レーザ:ファイバレーザ(波長1062nm)
周波数:10kHz
出力:3.8W
走査速度:1000mm/sec
走査回数:20回
照射間隔:1000μm
サブパルス数:20
評価は、目視によってレーザ加工痕の有無を確認し、レーザ加工痕の浮き出しが確認されなかったものを「合格」とし、レーザ加工痕の浮き出しが確認されたものを「不合格」とした。実施例1、実施例2、実施例3および比較例について得られた評価結果を表1に示す。
本発明は、実施形態に限定されず、その精神または主要な特徴から逸脱することなく他の色々な形で実施することができる。
2,12,22,32,42,52,62,72 金属部材
2a 平板状の部位
3 樹脂部材
4 穿孔部
5,15,25,35 折り曲げ部
6,16,26,36,46,56,66,76 レーザ加工部
45,55 T字状部
65,75 凹凸部
Claims (4)
- 金属部材のレーザ加工方法であって、
穿孔部を形成するためのレーザ光を照射する前に、前記金属部材の平板状の部位における、レーザ光の照射が予定されるレーザ加工部またはその近傍部の断面形状を、前記平板状の部位のままである場合と比較して、前記平板状の部位と平行な軸に関する断面二次モーメントが大きくなるような形状にプレス加工または打痕加工により形成することを特徴とする金属部材のレーザ加工方法。 - 請求項1に記載の金属部材のレーザ加工方法において、
前記レーザ加工部またはその近傍部に、折り曲げ部または凹凸部を形成することを特徴とする金属部材のレーザ加工方法。 - 請求項2に記載の金属部材のレーザ加工方法において、
前記折り曲げ部または凹凸部は、前記レーザ加工部の加工中心からの距離が0.00〜5.00mmの範囲に形成されていることを特徴とする金属部材のレーザ加工方法。 - 請求項1〜3のいずれか一つに記載の金属部材のレーザ加工方法において、
前記金属部材における前記レーザ加工部となる部位の厚みが、0.05〜1.00mmであることを特徴とする金属部材のレーザ加工方法。
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