JP5979323B1 - 金属帯の安定装置およびこれを用いた溶融めっき金属帯の製造方法 - Google Patents
金属帯の安定装置およびこれを用いた溶融めっき金属帯の製造方法 Download PDFInfo
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Abstract
Description
図1は、本発明の実施の形態にかかる金属帯の安定装置の一構成例を示す図である。図1に示すように、本発明の実施の形態にかかる金属帯の安定装置1は、走行中の金属帯15に対して振動抑制および位置矯正のための磁力を作用させる電磁石ユニット2と、走行中の金属帯15の変位を非接触で測定する変位測定部5と、必要な情報を入力する入力部6と、変位測定部5からの入力信号に基づいて電磁石ユニット2を制御する制御部7とを備える。
つぎに、本発明の実施の形態にかかる金属帯の安定装置1の一構成部である電磁石ユニット2の電磁石構成について説明する。図3は、本発明の実施の形態にかかる金属帯の安定装置における電磁石ユニットの電磁石構成の一例を示す図である。なお、図3には、電磁石ユニット2のうちの表面側電磁石群3に含まれる電磁石3a(図2参照)の一構成例が図示されている。以下では、電磁石ユニット2を代表して、表面側電磁石群3の電磁石3aの構成を説明する。この電磁石3aの構成は、例えば図2に示す裏面側電磁石群4の電磁石4a等、電磁石ユニット2を構成する全ての電磁石について同様である。
つぎに、上述した電磁石ユニット2を構成する各電磁石の回路構成について説明する。図4は、本発明の実施の形態にかかる金属帯の安定装置における電磁石の回路構成の一例を示す図である。なお、図4には、電磁石ユニット2のうちの表面側電磁石群3に含まれる電磁石3a(図2参照)の回路構成の一例が図示されている。以下では、電磁石ユニット2を代表して、表面側電磁石群3の電磁石3aの回路構成を説明する。
つぎに、本発明の基本原理、具体的には、電磁石におけるコイルの巻き数と、電磁石の応答性および吸引力との関係について説明する。コアにコイルを巻回して構成される電磁石の動作は、一般に、印加電圧eと、コイルに流れる電流iと、コイルのインダクタンスLと、コイルの抵抗Rと、時間tとを用い、次式(1)の方程式によって表現される。
e=L×(di/dt)+R×i ・・・(1)
T=L/R ・・・(2)
F∝N2×i2 ・・・(3)
したがって、電磁石が、同じ電流iによって大きな吸引力Fを得るためには、コイルの巻き数Nを増やすことが有利である。
e1=−M×(di2/dt) ・・・(4)
e2=−M×(di1/dt) ・・・(5)
M=k×√(L1×L2) ・・・(6)
M=k´×Ns2×α/(1+α)2 ・・・(7)
つぎに、本発明の実施の形態にかかる金属帯の安定装置1を適用した溶融めっき金属帯の製造ラインについて説明する。図7は、本発明の実施の形態にかかる溶融めっき金属帯の製造ラインの一構成例を示す図である。図8は、本発明の実施の形態にかかる溶融めっき金属帯の製造ラインのガスワイパ近傍を示す拡大図である。
つぎに、図7,8を参照しつつ、本発明の実施の形態にかかる溶融めっき金属帯の製造方法について説明する。本発明の実施の形態にかかる溶融めっき金属帯の製造方法では、金属帯の安定装置1が、製造ライン100に沿って走行中の金属帯15の振動抑制および位置矯正を行いながら、製造ライン100によって金属帯15から溶融めっき金属帯が順次製造される。
つぎに、本発明の実施例について説明する。本実施例は、図7に示したように溶融めっき金属帯の製造ライン100に適用した状態の金属帯の安定装置1を用い、製造ライン100に沿って走行中の金属帯15の振動抑制および位置矯正の効果を具体的に検証するものである。すなわち、本実施例では、上述した金属帯の安定装置1の効果を検証するための検証実験を行い、これにより、金属帯の安定装置1による走行中の金属帯15の振動抑制能力および位置矯正能力が評価される。以下、振動抑制能力は、金属帯の安定装置1が走行中の金属帯15の振動を振動抑制用磁力によって抑制する能力を意味する。位置矯正能力は、金属帯の安定装置1が走行中の金属帯15の位置を位置矯正用磁力によって矯正する能力を意味する。
2 電磁石ユニット
3 表面側電磁石群
3a,4a 電磁石
4 裏面側電磁石群
5 変位測定部
5a 非接触変位センサ
6 入力部
7 制御部
8 演算処理部
9a,9b 信号分配部
10,11,12,13 アンプ部
10a,11a アンプ
15 金属帯
17 振動抑制用コイル
18 位置矯正用コイル
19 コア
100 製造ライン
101 焼鈍炉
102 溶融金属浴
103 溶融金属
104 引き込みローラー
105,107 引き上げローラー
106 ガスワイパ
108 合金化炉
109 冷却帯
110 化成処理部
D1 長手方向
D2 幅方向
D3 厚さ方向
D4 走行方向
Claims (5)
- 走行中の金属帯の変位を非接触で測定する変位測定部と、
前記変位測定部による前記金属帯の変位の測定信号をもとに、前記金属帯の振動抑制を制御するための振動抑制信号と前記金属帯の位置矯正を制御するための位置矯正信号とを生成する制御部と、
前記制御部による前記振動抑制信号に基づいて第1の磁力を発生する振動抑制用コイルと、前記制御部による前記位置矯正信号に基づいて第2の磁力を発生する位置矯正用コイルと、前記振動抑制用コイルおよび前記位置矯正用コイルが同心に巻かれ、前記第1の磁力および前記第2の磁力を前記金属帯へ導くコアとを有し、前記第1の磁力によって前記金属帯の振動を抑制するとともに、前記第2の磁力によって前記金属帯の位置を矯正する電磁石ユニットと、
を備え、
前記位置矯正用コイルの巻き数は、前記振動抑制用コイルの巻き数の2倍以上、5倍以下の範囲内であることを特徴とする金属帯の安定装置。 - 前記電磁石ユニットは、
前記金属帯の表面側から、前記第1の磁力によって前記金属帯の振動を抑制するとともに前記第2の磁力によって前記金属帯の位置を矯正する表面側電磁石と、
前記金属帯の裏面側から、前記第1の磁力によって前記金属帯の振動を抑制するとともに前記第2の磁力によって前記金属帯の位置を矯正する裏面側電磁石と、
を備えたことを特徴とする請求項1に記載の金属帯の安定装置。 - 前記表面側電磁石および前記裏面側電磁石は、前記金属帯を挟んで互いに対向することを特徴とする請求項2に記載の金属帯の安定装置。
- 前記表面側電磁石および前記裏面側電磁石は、各々、前記金属帯の幅方向に複数並んで配置されることを特徴とする請求項2または3に記載の金属帯の安定装置。
- 製造ラインに沿って走行中の金属帯に溶融金属を付着させる付着工程と、
前記金属帯に付着させた前記溶融金属のうちの過剰分をガスワイパによって払拭して、前記金属帯における前記溶融金属の付着量を調整する調整工程と、
請求項1〜4のいずれか一つに記載の金属帯の安定装置によって、前記金属帯の振動および位置を非接触で制御する制御工程と、
を含むことを特徴とする溶融めっき金属帯の製造方法。
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