JP2016021383A - 自動車灯のレーザ溶接方法および関連する自動車灯 - Google Patents
自動車灯のレーザ溶接方法および関連する自動車灯 Download PDFInfo
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Abstract
Description
Claims (23)
- 自動車灯(4)の製造方法であって、前記製造方法は、
第1の周囲プロファイル(20)により画定される容器本体(8)を用意するステップと、
第2の周囲プロファイル(28)により内的に画定され、前記第2の周囲プロファイル(28)に対応する外方エッジ(32)により外的に画定されたレンズ本体(24)を用意するステップと、
前記容器本体(8)の前記第1の周囲プロファイル(20)と前記レンズ本体(24)の前記第2の周囲プロファイル(28)とをそれぞれ少なくとも部分的に相互に関連付けるステップであって、前記周囲プロファイル(20、28)間の接触表面が、曲線状横座標(S)により画定された曲線に沿って延在する溶接界面(36)を画定する、少なくとも部分的に相互に関連付けるステップと、
特徴的な発光スペクトルを有する光線または放射を放出する少なくとも1つのレーザ放出デバイスを用意するステップと、
前記レーザ放出デバイスから前記レーザ光線の複数部分を受け、前記レンズ本体(24)を通して前記溶接界面(36)に向けて前記複数部分を送る複数のファイバ(44)を用意するステップであって、ここにおいて、前記容器本体(8)は、前記光線に対する吸収要素として機能し、前記レンズ本体(24)は、前記光線の透過要素として機能する、複数のファイバ(44)を用意するステップと、
少なくとも1つの所定の光軸(X−X)に全体的に沿ってレーザ光線の前記複数部分を平行化するために、前記ファイバ(44)から出る前記複数部分の広がりを変化させるための光学デバイス(52)を用意するステップと
を備え、前記製造方法はさらに、
前記溶接界面(36)のクリティカル部分に、前記溶接界面(36)の前記クリティカル部分(64)に入射する光軸面(P)上に位置する各ファイバ(44)によって放出される少なくとも第1のレーザ光線(60)を送るステップを備えることを特徴とし、
前記光軸面(P)は、前記溶接界面(36)の前記クリティカル部分(64)に対して接線方向となる面(T)との間に0〜45度の配向角度(α)を特定する、自動車灯(4)製造方法。 - 前記光軸面(P)は、前記クリティカル部分(64)に対して接線方向となる面(T)との間に0〜30度の配向角度(α)を特定する、請求項1に記載の自動車灯(4)の製造方法。
- 前記光軸面(P)は、前記クリティカル部分(64)に対して接線方向となる面(T)との間に0〜10度の配向角度(α)を特定する、請求項1または2に記載の自動車灯(4)の製造方法。
- 前記光軸面(P)は、前記クリティカル部分(64)に対して接線方向となる面(T)に対して実質的に平行である、請求項1から3のいずれか一項に記載の自動車灯(4)の製造方法。
- 前記溶接界面(36)の前記クリティカル部分(64)に一対のレーザ光線(68)を送るステップを備え、前記レーザ光線は、前記クリティカル部分(64)に対して平行な同一の光軸面(P)上に位置する各光軸(X)を有し、前記光軸(X)は、前記溶接界面(36)の前記クリティカル部分(64)の中間点に対して両側に対称に配置される、請求項1から4のいずれか一項に記載の自動車灯の製造方法。
- 前記溶接界面(36)の前記クリティカル部分(64)に、各ファイバ(44)によりそれぞれ分配される複数の「n」個のレーザ光線を送るステップを備え、前記レーザ光線は、前記クリティカル部分(64)に対して平行な前記同一の光軸面(P)上に位置する各光軸(X)を有する、請求項1から5のいずれか一項に記載の自動車灯(4)の製造方法。
- レーザ光線の複数部分を受ける前記ファイバ(44)は、前記レンズ本体(24)の前記外方エッジ(32)への前記レーザ光線の入射で発生するレーザ光線の屈折を補償するために前記各光軸面(P)に対して傾斜する光軸(X)を備える、請求項1から6のいずれか一項に記載の自動車灯(4)の製造方法。
- 少なくとも1つの不連続部(54)すなわち前記外方エッジ(32)と前記溶接界面(36)との間の距離(55)の変化を特定するステップと、
前記溶接界面(36)の前記クリティカル部分(64)に、各ファイバ(44)により放出された少なくとも第1のレーザ光線を送るステップであって、前記クリティカル部分(64)は、前記不連続部(54)に対応しており、前記第1のレーザ光線は、前記溶接界面(36)の前記クリティカル部分(64)に入射する光軸面(P)上に位置する各光軸(X)を有する、少なくとも第1のレーザ光線を送るステップと、
を備え、
前記光軸面(P)は、前記クリティカル部分(64)に対して接線方向となる面(T)との間に0〜45度の配向角度(α)を特定する、請求項1から7のいずれか一項に記載の自動車灯の製造方法。 - 前記不連続部(54)は、前記レンズ本体(24)の前記外方エッジ(32)と前記第2の周囲プロファイル(28)との間の距離の縮小を実現するために凹状部分を備える、請求項8に記載の自動車灯の製造方法。
- 前記不連続部(54)は、前記レンズ本体(24)の前記外方エッジ(32)と前記第2の周囲プロファイル(28)との間の前記距離の拡大を実現するために凸状部分を備える、請求項8に記載の自動車灯(4)の製造方法。
- 前記レンズ本体(24)の前記不連続部(54)は、前記レンズ本体(24)の表面または前記外方エッジ(32)に対して垂直な線の角度変動により規定されるものであり、この角度変動は、前記溶接界面(36)の隣接し合う被照射ゾーン(x1)と(x2)との間に距離を生じさせ、それにより、それらの間における前記溶接界面(36)への前記レーザ光線の照射は、ピーク値の25%未満となる、請求項8、9、または10のいずれか一項に記載の自動車灯(4)の製造方法。
- 前記不連続部(54)は、実質的に「U字」または「V字」形状を有する、請求項8から11のいずれか一項に記載の自動車灯(4)の製造方法。
- 不連続性すなわち前記レンズ本体(24)の前記外方エッジ(32)と前記溶接界面(36)との間の前記距離の変化を伴わない前記レンズ本体(24)の部分が存在する場合に、前記溶接界面(36)の対応する非クリティカル部分(72)に、対応するファイバ(44)により放出された少なくとも1つのレーザ光線を送るステップが実施され、
前記レーザ光線は、前記溶接界面(36)の前記非クリティカル部分(72)に入射する第2の光軸面(Z)上に位置する各光軸(Y)を有し、前記第2の光軸面(Z)は、前記非クリティカル部分(72)に対して接線方向となる面(R)との間に46〜90度の間の角度配向(β)を特定する、請求項8から12のいずれか一項に記載の自動車灯(4)の製造方法。 - 前記少なくとも1つのレーザ光線は、前記溶接界面(36)の前記非クリティカル部分(72)に対して実質的に垂直な第2の光軸面(Z)上に位置する各光軸(Y)を有する、請求項13に記載の自動車灯の製造方法。
- 前記溶接界面(36)の前記非クリティカル部分(72)に一対のレーザ光線(68)を送るステップを備え、前記レーザ光線は、前記溶接界面(36)の前記非クリティカル部分(72)に入射する前記同一の第2の光軸面(Z)に位置する各光軸(Y)を有し、前記光軸(Y)は、前記溶接界面(36)の前記非クリティカル部分(72)に対して両側に対称に配置される、請求項13または14に記載の自動車灯の製造方法。
- 前記溶接界面(36)の前記非クリティカル部分(72)に、各ファイバ(44)によりそれぞれ分配された複数の「n」個のレーザ光線を送るステップを備え、前記レーザ光線は、前記溶接界面(36)の前記非クリティカル部分(72)に対して平行な前記同一の光軸面(Z)上に位置する各光軸(Y)を有する、請求項13から15のいずれか一項に記載の自動車灯の製造方法。
- 前記ファイバ(44)から出る前記レーザ光線の広がりを変化させるための前記光学デバイス(52)は、入力(80)と出力(84)とを有するネガティブ光導波路(76)を備え、前記入力(80)は、前記ファイバ(44)に対面しており、前記出力は、前記レンズ本体(24)に対面しており、一対の反射壁部(88)が、前記レンズ本体(24)に向かって収束するように、前記レーザ光線の前記光軸が位置する中間面(92)に対して鏡面的に傾斜する、請求項1から16のいずれか一項に記載の自動車灯の製造方法。
- 前記光導波路の前記出力(84)は、前記レンズ本体(24)の前記外方エッジ(32)との間で形状結合を形成するために、前記レンズ本体(24)の前記外方エッジ(32)に対する対応形状を有する、請求項17に記載の自動車灯の製造方法。
- 前記ネガティブ光導波路(76)は、複数の部分またはローブ(Ln)を備える空間分布に従って前記出力(84)から前記レーザ放射を分配し、ここにおいて、少なくとも1つのローブL0が、前記光軸(X)に沿って延在する、請求項17または18に記載の自動車灯の製造方法。
- 前記レンズ本体(24)内における反射を被ることなく、前記レンズ本体(24)を通過し前記溶接界面(36)に入射する「0」度を有する少なくとも1つのローブ(L0)を生成するステップを備える、請求項19に記載の自動車灯の製造方法。
- 前記レンズ本体(24)内で異なる回数の反射を被って前記レンズ本体を通り前記溶接界面に入射する、異なる角度を有する少なくとも2つのローブ(Ln)を生成するステップを備える、請求項19または20に記載の自動車灯の製造方法。
- 前記ファイバ(44)から出る前記レーザ光線の広がりを変化させるための前記光学デバイスは、前記レーザ光線の少なくとも1つの部分について全内部反射条件を満たすのに適した固相本体、すなわちポジティブ光導波路を備え、前記固相本体は、入力から出力まで延在し、前記入力は、前記ファイバに対面しており、前記出力は、前記レンズ本体(24)に対面しており、ここにおいて、前記固相本体は、前記レーザ光線の前記放出波長に対して透過性を有する材料から構成される、請求項1から16のいずれか一項に記載の自動車灯の製造方法。
- 請求項1から22のいずれか一項に記載の製造方法により製造される自動車灯(4)。
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