JP5367752B2 - 半田メッキ線の製造方法及び製造装置 - Google Patents
半田メッキ線の製造方法及び製造装置 Download PDFInfo
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Description
しかし、太陽電池セルが薄型化すると強度が弱くなり、太陽電池セルにおける太陽電池用リード線を半田接続した接続部分は、互いの膨張率の違いにより太陽電池セルに反りや破損が発生し易くなるという問題があった。
特許文献2における太陽電池用平角導体の製造方法は、導体を圧延などの工程により平角状に成形した後、熱処理工程により0.2%耐力を低減することや、導体の表面に半田メッキ膜を施す製造方法である。
本実施形態の半田メッキ線の製造装置10は、図1に示すように、被メッキ線1aに対してメッキ前処理を行うメッキ前処理手段2と、被メッキ線1aの表面に半田メッキを施すメッキ手段61と、表面にメッキを施したメッキ線1bを巻取る巻取り手段71とで構成している。
巻取り手段71は、巻取り張力調節機72、及び、ボビントラバース方式巻取り機75で構成している。
槽上方向転換ローラ65は、巻取り手段上流側配置ローラ73Aよりも高い位置に配置している。
半田メッキ線の製造方法は、被メッキ線1aに対してメッキ前処理を行うメッキ前処理工程と、被メッキ線1aの表面に半田メッキを施すメッキ工程と、表面にメッキを施したメッキ線1bを巻取る巻取り工程とを経て製造される。
軟化焼鈍工程では、内部を還元ガス雰囲気とした軟化焼鈍炉51の内部に被メッキ線1aを走行させることで該被メッキ線1aを軟化焼鈍して低耐力化するとともに、被メッキ線1aの表面の酸化層を還元する工程である。
半田メッキ線の製造装置10は、メッキ前処理手段2としてのサプライヤ11、加熱処理炉22、酸洗浄槽31、超音波水洗浄槽41、及び、軟化焼鈍炉51と、メッキ手段61としての溶融半田メッキ槽62と、巻取り手段71を、それぞれメッキ線1bの走行方向の上流側から下流側へこの順に一連配置している。
但し、上述した半田メッキ線の製造装置10および製造方法によれば、加熱処理工程において、軟化焼鈍炉51の上流側に配置した加熱処理炉22で0.2%耐力値が所定の値に完全に低下するまで被メッキ線1aに対して軟化焼鈍せずに、軽度の軟化焼鈍に留めておく。そして、加熱処理工程後の洗浄工程において、被メッキ線1aに対して必要な洗浄を完了しておき、その後、メッキ工程の直前である軟化焼鈍工程で0.2%耐力値が所定の値に低下するまで被メッキ線1aに対して軟化焼鈍を行う。
まず、加熱処理工程、及び、軟化焼鈍工程に関する効果確認実験として行った焼鈍効果確認実験A,Bの2つの実験について説明する。
(焼鈍効果確認実験A)
焼鈍効果確認実験Aでは、加熱処理温度が100度という低い温度設定の下で加熱処理工程を行い、その後、軟化焼鈍工程において、様々な焼鈍温度の下で軟化焼鈍を行う場合における焼鈍温度の設定と、巻き取り工程後の銅線の低耐力値との関係を明らかにし、この関係をもとに、所望の低耐力値を得るために軟化焼鈍工程において設定すべき焼鈍温度について確認した。
焼鈍効果確認実験Bでは、様々な加熱処理温度の下で加熱処理工程を行い、加熱処理工程後の被メッキ線1aの0.2%耐力値と加熱処理温度との関係を明らかにするとともに、これら被メッキ線1aに対して、850℃という一定の焼鈍温度の設定の下で軟化焼鈍工程を行い、軟化焼鈍工程後の0.2%耐力値と加熱処理温度との関係を明らかにした。
表4(b)は、上述した所定の加熱処理温度の設定ごとに、加熱処理工程を行った各被メッキ線1aに対して、軟化焼鈍工程において焼鈍温度を850度という共通の設定の下で焼鈍を行い、巻取り後の半田メッキ線1bの0.2%耐力値を測定した結果を示している。
一方、加熱処理工程において加熱処理温度が高ければ、該加熱処理工程においても十分に焼鈍効果を得ることができ、その分、軟化焼鈍工程での焼鈍効果が小さくなった。
焼鈍炉水素濃度検証実験Aでは、本発明例のメッキ線1bと比較例のメッキ線とを供試体として上述した製造工程を経て作成した。
本発明例のメッキ線1bと比較例のメッキ線とは、軟化焼鈍工程のみが異なるが、その他の工程は全て同じ工程を経てそれぞれ作成している。
焼鈍炉水素濃度検証実験Bでは、軟化焼鈍炉51の内部に対して還元ガス供給部57から供給する還元ガスGを、少なくとも窒素を含有する水素との混合ガスとし、混合ガスに対して水素ガスが占める体積比率であらわれる混合率の違いによるメッキ線1b(被メッキ線1a)の0.2%耐力値の影響について検証する実験を、上述した製造装置を用いて表5に示す実験条件の下で行った。
例えば、他の実施形態における製造装置10Aには、図8(a),(b)に示すように、超音波水洗浄槽41と軟化焼鈍炉51との間にプレ加熱炉51Pを設けることができる。
プレ加熱炉51Pは、図8(b)に示すように、被メッキ線1aの走行時間、及び、走行距離が短い場合においても、被メッキ線1aの温度を急激に高めることに特化して構成している。
加熱処理炉22は、この発明の加熱処理手段に対応するも、
この発明は、上述の実施形態の構成のみに限定されるものではなく、多くの実施の形態を得ることができる。
1b…メッキ線
2…メッキ前処理手段
10…メッキ線の製造装置
12…サプライヤ
22…加熱処理炉
31…酸洗浄槽
41…超音波水洗浄槽
51…軟化焼鈍炉
57…還元ガス供給部
61…メッキ手段
63…溶融半田メッキ液
71…巻取り手段
72…巻取り張力調節機
75…ボビントラバース方式巻取り機
83…引き取りキャプスタン部
G…還元ガス
Claims (2)
- 純銅系材料で形成した銅線に対してメッキ前処理を行うメッキ前処理手段と、
銅線の表面に半田メッキを施すメッキ手段と、
表面にメッキを施した銅線を巻取る巻取り手段とで構成される半田メッキ線の製造装置であって、
前記メッキ前処理手段に、銅線を軟化焼鈍して低耐力化する軟化焼鈍手段を備え、
低耐力化した前記銅線を、該銅線の耐力よりも低い巻取り力で前記巻取り手段により巻取る構成とし、
前記軟化焼鈍手段、前記メッキ手段、及び、前記巻取り手段を、銅線の走行方向の上流側からこの順に一連配置し、
前記メッキ前処理手段に、銅線に対して加熱処理を行う加熱処理手段と、洗浄手段とを備え、
前記加熱処理手段と前記洗浄手段とを、前記軟化焼鈍手段よりも銅線走行方向の上流側にこの順に配置し、
前記加熱処理手段を、
100〜300度の加熱処理温度に設定可能に構成するとともに、
前記軟化焼鈍手段を、
800〜900度の軟化焼鈍温度に設定可能に構成した
半田メッキ線の製造装置。 - 純銅系材料で形成した銅線に対してメッキ前処理を行うメッキ前処理工程と、
銅線の表面に半田メッキを施すメッキ工程と、
表面にメッキを施した銅線を巻取る巻取り工程とを経て製造される半田メッキ線の製造方法であって、
前記メッキ前処理工程では、銅線を軟化焼鈍して低耐力化する軟化焼鈍工程を行い、
前記巻取り工程を、
低耐力化した前記銅線の耐力よりも低い巻取り力で巻取る工程とし、
前記巻取り工程の間、前記軟化焼鈍工程と前記メッキ工程とを連続して行い、
前記メッキ前処理工程において、
前記軟化焼鈍工程の前に銅線に対して加熱処理工程と、洗浄工程とをこの順で行い、
加熱処理工程において、100〜300度の加熱処理温度に設定するとともに、
前記軟化焼鈍工程において、800〜900度の軟化焼鈍温度に設定する
半田メッキ線の製造方法。
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