JP2013166351A - レーザー溶着状態判定方法およびレーザー溶着状態判定装置 - Google Patents
レーザー溶着状態判定方法およびレーザー溶着状態判定装置 Download PDFInfo
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
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- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
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- B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
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- B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
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- B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
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- B29C66/05—Particular design of joint configurations
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- B29C66/112—Single lapped joints
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- B29C66/05—Particular design of joint configurations
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- B29C66/114—Single butt joints
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Abstract
【解決手段】レーザー光に対して透過性のある樹脂部材とレーザー光に対して吸収性のある樹脂部材とをレーザー溶着で接合する際の溶着状態を判定するレーザー溶着状態判定方法が提供される。この方法は、レーザー溶着中に溶着位置における温度に相関のある指標値をセンサーを用いて検出する工程と、レーザー溶着期間を構成する複数の小期間のそれぞれにおける指標値の平均値を算出する工程と、特定の2つの小期間における平均値の差が所定の範囲内であるか否かを判定する工程と、を備える。
【選択図】図4
Description
レーザー溶着中に溶着位置における温度に相関のある指標値をセンサーを用いて検出する工程と、
レーザー溶着期間を構成する複数の小期間のそれぞれにおける前記指標値の平均値を算出する工程と、
特定の2つの前記小期間における前記平均値の差が所定の範囲内であるか否かを判定する工程と、を備える、レーザー溶着状態判定方法。
前記複数の小期間は、前記レーザー溶着期間の内の有効期間を均等に分割した各期間であり、
前記特定の2つの小期間は、前記平均値が最大の前記小期間と前記平均値が最小の前記小期間である、レーザー溶着状態判定方法。
前記有効期間は、前記レーザー溶着期間から、最初の所定の期間と最後の所定の期間との少なくとも一方を除いた期間である、レーザー溶着状態判定方法。
前記複数の小期間は、前記レーザー溶着の溶着軌跡上の各部分に対応する各期間であり、
前記特定の2つの小期間は、前記溶着軌跡における互いに形状が類似する2つの部分に対応する前記小期間である、レーザー溶着状態判定方法。
前記算出する工程の前に、前記検出された指標値に対して、異常データのマスキング処理と、ノイズ除去処理と、の少なくとも一方を実行する工程を備える、レーザー溶着状態判定方法。
A.第1実施例:
A−1.レーザー溶着システムの構成:
A−2.溶着状態判定処理:
B.第2実施例:
C.変形例:
A−1.レーザー溶着システムの構成:
図1は、本発明の第1実施例におけるレーザー溶着システム10の構成を示す説明図である。レーザー溶着システム10は、樹脂部材同士をレーザー溶着によって接合すると共に、溶着状態を判定するシステムである。
図3は、本実施例における溶着状態判定処理の流れを示すフローチャートである。溶着状態判定処理は、レーザー溶着された透過性樹脂部材22と吸収性樹脂部材24との間の溶着状態の良否を判定する処理であり、より具体的には、図2に示す例のように溶着軌跡WLの一部において透過性樹脂部材22と吸収性樹脂部材24との間に間隙GAが存在していることに起因する溶着状態の不良を検出する処理である。レーザー溶着の際に透過性樹脂部材22と吸収性樹脂部材24との間に間隙GAがあると、レーザー光LAによって発熱した吸収性樹脂部材24から透過性樹脂部材22に熱が十分に伝わらないために透過性樹脂部材22が十分に発熱・溶融せず、溶着強度の低下や溶着位置における隙間の発生といった溶着状態の不良が発生する場合がある。このような溶着状態の不良は、溶着後の製品において、不良部分を介して異物(水やガス)が侵入し、内部の設置物(例えば電子回路)の動作に悪影響を及ぼしたり金属部分の腐食につながったりすると共に、被溶着部材が脱落するおそれもあり、好ましくない。溶着状態判定処理は、このような溶着状態の不良の有無を判定するために実行される。
図6は、第2実施例における溶着状態判定処理の流れを示すフローチャートである。第2実施例における溶着状態判定処理において、温度データの読み込み(ステップS110)からノイズ除去処理(ステップS140)までの処理内容は図3に示した第1実施例と同様であるため、ここでは説明を省略する。以下、第1実施例とは異なるそれ以降の処理内容について説明する。
なお、この発明は上記の実施例や実施形態に限られるものではなく、その要旨を逸脱しない範囲において種々の態様において実施することが可能であり、例えば次のような変形も可能である。
12…レーザー照射装置
14…赤外線センサー
16…センサーアンプ
18…判定装置
22…透過性樹脂部材
24…吸収性樹脂部材
26…溶着部
Claims (6)
- レーザー光に対して透過性のある樹脂部材とレーザー光に対して吸収性のある樹脂部材とをレーザー溶着で接合する際の溶着状態を判定するレーザー溶着状態判定方法において、
レーザー溶着中に溶着位置における温度に相関のある指標値をセンサーを用いて検出する工程と、
レーザー溶着期間を構成する複数の小期間のそれぞれにおける前記指標値の平均値を算出する工程と、
特定の2つの前記小期間における前記平均値の差が所定の範囲内であるか否かを判定する工程と、を備える、レーザー溶着状態判定方法。 - 請求項1に記載のレーザー溶着状態判定方法であって、
前記複数の小期間は、前記レーザー溶着期間の内の有効期間を均等に分割した各期間であり、
前記特定の2つの小期間は、前記平均値が最大の前記小期間と前記平均値が最小の前記小期間である、レーザー溶着状態判定方法。 - 請求項2に記載のレーザー溶着状態判定方法であって、
前記有効期間は、前記レーザー溶着期間から、最初の所定の期間と最後の所定の期間との少なくとも一方を除いた期間である、レーザー溶着状態判定方法。 - 請求項1に記載のレーザー溶着状態判定方法であって、
前記複数の小期間は、前記レーザー溶着の溶着軌跡上の各部分に対応する各期間であり、
前記特定の2つの小期間は、前記溶着軌跡における互いに形状が類似する2つの部分に対応する前記小期間である、レーザー溶着状態判定方法。 - 請求項1ないし請求項4のいずれかに記載のレーザー溶着状態判定方法であって、さらに、
前記算出する工程の前に、前記検出された指標値に対して、異常データのマスキング処理と、ノイズ除去処理と、の少なくとも一方を実行する工程を備える、レーザー溶着状態判定方法。 - レーザー光に対して透過性のある樹脂部材とレーザー光に対して吸収性のある樹脂部材とをレーザー溶着で接合する際の溶着状態を判定するレーザー溶着状態判定装置において、
レーザー溶着中に溶着位置における温度に相関のある指標値をセンサーを用いて検出する検出部と、
レーザー溶着期間を構成する複数の小期間のそれぞれにおける前記指標値の平均値を算出する算出部と、
特定の2つの前記小期間における前記平均値の差が所定の範囲内であるか否かを判定する判定部と、を備える、レーザー溶着状態判定装置。
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JP2015208958A (ja) * | 2014-04-28 | 2015-11-24 | ハジメ産業株式会社 | レーザ溶着装置 |
WO2023176349A1 (ja) * | 2022-03-18 | 2023-09-21 | パナソニックIpマネジメント株式会社 | 評価方法、溶着物の製造方法、評価装置および溶着物製造装置 |
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JPH05337663A (ja) * | 1991-10-22 | 1993-12-21 | Mitsubishi Heavy Ind Ltd | 溶接状況監視装置 |
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WO2023176349A1 (ja) * | 2022-03-18 | 2023-09-21 | パナソニックIpマネジメント株式会社 | 評価方法、溶着物の製造方法、評価装置および溶着物製造装置 |
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