JPH07151622A - Method for measuring tension of process line - Google Patents

Method for measuring tension of process line

Info

Publication number
JPH07151622A
JPH07151622A JP5297643A JP29764393A JPH07151622A JP H07151622 A JPH07151622 A JP H07151622A JP 5297643 A JP5297643 A JP 5297643A JP 29764393 A JP29764393 A JP 29764393A JP H07151622 A JPH07151622 A JP H07151622A
Authority
JP
Japan
Prior art keywords
tension
strip
process line
measured
load cell
Prior art date
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.)
Withdrawn
Application number
JP5297643A
Other languages
Japanese (ja)
Inventor
Koichi Oda
晃一 小田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP5297643A priority Critical patent/JPH07151622A/en
Publication of JPH07151622A publication Critical patent/JPH07151622A/en
Withdrawn legal-status Critical Current

Links

Landscapes

  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Abstract

PURPOSE:To measure tension being applied to the strip of a process line accurately. CONSTITUTION:In a method for measuring the tension of a process line wherein a strip 1 is wound around a tension detecting roll 3 provided for the process line and the tension being applied to the strip 1 is measured by means of a load cell 5, the winding angle of the strip 1 is switched in multistage depending on the tension of the strip 1 to be measured.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、広範囲な張力制御が
必要なストリップのプロセスラインにおける張力計測方
法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension measuring method in a strip process line which requires a wide range of tension control.

【0002】[0002]

【従来の技術】装入するストリップの最大断面積が最小
断面積の10倍以上にもなるストリップのプロセスライ
ンにおいては、ユニット張力が一定の場合には、ストリ
ップにかかる最大張力は最小張力の10倍以上となる。
2. Description of the Related Art In a strip process line in which the maximum cross-sectional area of a strip to be charged exceeds 10 times the minimum cross-sectional area, the maximum tension applied to the strip is 10 times the minimum tension when the unit tension is constant. More than double.

【0003】このような張力の測定は、従来、一般には
一定の巻付け角でストリップを巻付けた張力検出ロール
の下方に配備した1個のロードセルにより行うようにし
ているが、検出精度上許容できる最大張力と最小張力の
比は6倍程度であり、上述したように張力の範囲が10
倍以上となるプロセスラインの場合、張力が正確に測定
できないという問題がある。
Conventionally, such a tension is measured by a single load cell provided below a tension detecting roll wound with a strip at a constant wrapping angle. The ratio of the maximum tension and the minimum tension that can be achieved is about 6 times, and the range of tension is 10 as described above.
In the case of a process line that doubles the tension, there is a problem that the tension cannot be measured accurately.

【0004】このような問題に対処する方法としては、
次のような二つの方法がある。 (1)定格容量の異なる2種類のロードセルを使用し、
高張力範囲と低張力範囲とでロードセルを切替える方
法。 (2)ロードセルは1種類しか使用しないが、電圧から
張力信号に切替えるときに、張力の高低で感度を2種類
の感度に切り替える。
As a method of dealing with such a problem,
There are two ways: (1) Use two types of load cells with different rated capacities,
A method of switching the load cell between the high tension range and the low tension range. (2) Only one type of load cell is used, but when the voltage is switched to the tension signal, the sensitivity is switched to two types depending on the level of tension.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、上述し
た従来の張力測定方法には、次のような問題点があっ
た。 (1)の方法では、ロードセル切り替え時に、ロードセ
ル荷重伝達部の接触状態を毎回再現できる機構が必要で
あり、再現できない場合大きいな誤差要因となる。 (2)の方法では、低張力範囲を測定するために、感度
を高くする必要があるが、これにより機械的ノイズおよ
び電気的ノイズの影響を受けやすくなり、高張力範囲の
場合と同一の精度を維持することは困難である。
However, the above-described conventional tension measuring method has the following problems. The method (1) requires a mechanism capable of reproducing the contact state of the load cell load transmitting portion every time the load cell is switched, and if it cannot be reproduced, it causes a large error factor. In the method of (2), it is necessary to increase the sensitivity in order to measure the low tension range, but this makes it more susceptible to mechanical noise and electrical noise, and has the same accuracy as in the high tension range. Is difficult to maintain.

【0006】この発明は、従来技術の上述のような問題
点を解消するためになされたものであり、1種類のロー
ドセルで感度を切り替えることなしに、広い範囲の張力
が計測できるプロセスラインの張力計測方法を提供する
ことを目的としている。
The present invention has been made in order to solve the above-mentioned problems of the prior art, and the tension of a process line capable of measuring the tension in a wide range without switching the sensitivity with one type of load cell. The purpose is to provide a measurement method.

【0007】[0007]

【課題を解決するための手段】この発明に係るプロセス
ラインの張力計測方法は、プロセスラインに設けた張力
検出ロールにストリップを巻き付けて、ストリップにか
かる張力をロードセルで計測するプロセスラインの張力
計測方法において、計測するストリップの張力に応じ
て、張力検出ロールに巻き付けたストリップの巻付け角
を段階的に切り換えて張力を計測することを特徴とする
ものである。
A tension measuring method for a process line according to the present invention is a tension measuring method for a process line, wherein a strip is wound around a tension detecting roll provided on the process line and the tension applied to the strip is measured by a load cell. In the above method, the tension is measured by gradually changing the winding angle of the strip wound around the tension detecting roll in accordance with the measured tension of the strip.

【0008】[0008]

【作用】巻付き角をθとし、張力Tの垂直方向の分力を
Xとすると、張力Tは図2の関係から(1)式で表され
る。 T=X/sinα=X/sin(θ/2) (1) 一方、張力検出ロール21のストリップ水平状態からの
押込み量をh、ストリップを支持する2本のデフレクタ
ーロール22間の距離をL、巻付き角をθとすると、図
3の関係からtan(θ/2)は(2)式で表せる。 tan(θ/2)=h/(L/2) (2) したがって、θ/2は(3)式で表せる。 θ/2=arctan(2h/L) (3) すなわち、張力Tの垂直方向の分力Xと、張力検出ロー
ルの押込み量hが分かれば、張力Tを把握することがで
きる。
When the wrapping angle is θ and the vertical component of the tension T is X, the tension T is expressed by the equation (1) from the relationship of FIG. T = X / sin α = X / sin (θ / 2) (1) On the other hand, the pushing amount of the tension detecting roll 21 from the horizontal state of the strip is h, the distance between the two deflector rolls 22 supporting the strip is L, Assuming that the winding angle is θ, tan (θ / 2) can be expressed by equation (2) from the relationship of FIG. tan (θ / 2) = h / (L / 2) (2) Therefore, θ / 2 can be expressed by the equation (3). θ / 2 = arctan (2h / L) (3) That is, the tension T can be grasped by knowing the vertical component force X of the tension T and the pushing amount h of the tension detection roll.

【0009】そこで、本発明においては、張力検出ロー
ルの押込み量hを所定の値h0 に設定して、張力Tの垂
直方向の分力Xを測定して、張力Tを前記(1)式およ
び(3)式を用いて算出する。
Therefore, in the present invention, the pushing amount h of the tension detecting roll is set to a predetermined value h 0 , the vertical component force X of the tension T is measured, and the tension T is calculated by the equation (1). And it calculates using (3) Formula.

【0010】このようにして算出した張力Tが所定の張
力T0 よりも小さくなって、測定した張力Tの垂直方向
の分力Xの値の測定精度が保てなくなったときには、張
力検出ロールの押込み量hをh0 ´とそれまでのh0
りも大きい値に設定しなおして、張力Tを同じく前記
(1)式および(3)式を用いて算出する。なお、必要
に応じて多段階に切り換えてもよく、切替え点は必要と
される精度に応じて適宜決定すればよい。
When the tension T calculated in this way becomes smaller than the predetermined tension T 0 and the measurement accuracy of the value of the component force X in the vertical direction of the measured tension T cannot be maintained, the tension detecting roll The pushing amount h is reset to h 0 ′ and a value larger than h 0 up to that point, and the tension T is calculated by using the equations (1) and (3). It should be noted that switching may be performed in multiple steps as necessary, and the switching point may be appropriately determined according to the required accuracy.

【0011】[0011]

【実施例】本発明の実施例のプロセスラインの張力計測
方法を、図1により説明する。図1はこの張力計測方法
を行うときの装置構成を示すブロック図である。この張
力計測方法においては、ストリップ1を支持する2本の
デフレクターロール2間に、張力検出ロール3を配置
し、昇降装置4で張力検出ロール3を上昇させ、ストリ
ップ1を張力検出ロール3に巻付けた状態で、張力Tの
垂直方向の分力Xを、張力検出ロール3の下方に設けた
ロードセル5で計測する。計測された分力Xの信号は張
力演算器6に送られ、前記(1)式により張力Tが演算
される。なお、巻付け角θは、張力検出ロール3の垂直
方向位置を検出する位置検出器7からの信号、および2
本のデフレクターロール間の距離Lとから、あらかじめ
算出できるので、設定器8で設定しておく。
EXAMPLE A process line tension measuring method according to an example of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a device configuration when performing this tension measuring method. In this tension measuring method, the tension detecting roll 3 is arranged between two deflector rolls 2 supporting the strip 1, and the lifting device 4 raises the tension detecting roll 3 to wind the strip 1 around the tension detecting roll 3. In the attached state, the vertical component force X of the tension T is measured by the load cell 5 provided below the tension detection roll 3. The signal of the measured component force X is sent to the tension calculator 6 and the tension T is calculated by the equation (1). The wrapping angle θ is the signal from the position detector 7 that detects the vertical position of the tension detecting roll 3, and 2
Since it can be calculated in advance from the distance L between the deflector rolls of the book, it is set by the setting device 8.

【0012】張力演算器6で演算された張力Tの値は張
力比較器9に送られ、あらかじめ設定してある張力の設
定値T0 と比較される。計測された張力Tが設定値T0
を下回ったときには、張力比較器9から昇降装置4の昇
降制御器10に位置変更の指示が行われ、昇降制御器1
0からの信号により、昇降装置4が所定の高さ上昇す
る。昇降装置4の位置の変更は、位置検出器7により検
出され、その信号が前記設定器8に送られ、張力演算器
6に設定してある巻付け角の設定変えが行われる。
The value of the tension T calculated by the tension calculator 6 is sent to a tension comparator 9 and compared with a preset tension set value T 0 . The measured tension T is the set value T 0
When the value falls below the lower limit, the tension comparator 9 instructs the lift controller 10 of the lift device 4 to change the position, and the lift controller 1
A signal from 0 raises the lifting device 4 to a predetermined height. A change in the position of the lifting device 4 is detected by the position detector 7, a signal thereof is sent to the setting device 8, and the setting of the winding angle set in the tension calculator 6 is changed.

【0013】本発明のプロセスラインの張力計測方法
は、上述のようにして行われるので、1種類のロードセ
ルでかつ感度を変更することなく、計測精度が低下する
低張力域においても、高精度で張力を検出することがで
きる。表1にストリップにかかる張力と巻付け角が変化
することにより、張力測定精度がどのように変化するか
について、測定した結果を示す。
Since the tension measuring method for the process line of the present invention is performed as described above, it is highly accurate even in the low tension region where the measuring accuracy is lowered without changing the sensitivity with one type of load cell. The tension can be detected. Table 1 shows the results of measurement of how the tension measurement accuracy changes as the tension applied to the strip and the winding angle change.

【0014】[0014]

【表1】 [Table 1]

【0015】表1から分かるように、張力が9550k
gかかっているときには、巻付け角3°で張力測定精度
は0.3%と非常によいが、巻付け角3°のままで張力
が2000kgに低下すると、張力測定精度は1.4%
と極めて悪くなる。しかしながら、張力が2000kg
でも、巻付け角を14.5°まで大きくすると、張力測
定精度は0.3%と、張力が9550kgかかっている
ときと同じ程度まで、測定精度を高めることができる。
As can be seen from Table 1, the tension is 9550 k
When g is applied, the tension measurement accuracy is 0.3% at a wrapping angle of 3 °, which is very good, but when the tension drops to 2000 kg with the wrapping angle of 3 °, the tension measurement accuracy is 1.4%.
Becomes extremely bad. However, the tension is 2000 kg
However, when the wrapping angle is increased to 14.5 °, the tension measurement accuracy is 0.3%, and the measurement accuracy can be improved to the same level as when the tension is applied at 9550 kg.

【0016】なお、測定張力と張力検出ロール3の位置
の関係については、ヒステリシス特性を持たせることに
より、切替え点付近において張力検出ロール位置の切り
換えが頻繁に行われて測定が不安定になることを防ぐこ
とができる。
Regarding the relationship between the measured tension and the position of the tension detecting roll 3, by providing a hysteresis characteristic, the position of the tension detecting roll is frequently switched near the switching point, and the measurement becomes unstable. Can be prevented.

【0017】[0017]

【発明の効果】この発明により、1種類のロードセルで
かつ感度を変更することなく、計測精度が低下する低張
力域においても、高精度で張力を検出することができ
る。
According to the present invention, the tension can be detected with high accuracy even in a low tension region where the measurement accuracy is lowered without changing the sensitivity with one type of load cell.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明のプロセスラインの張力計測方法を行う
ときの装置構成を示すブロック図である。
FIG. 1 is a block diagram showing an apparatus configuration when performing a tension measuring method for a process line according to the present invention.

【図2】張力の垂直方向分力と巻付け角とから、張力が
求められることを説明した説明図である。
FIG. 2 is an explanatory diagram illustrating that the tension is obtained from the vertical component of the tension and the winding angle.

【図3】2本のデフレクターロール間の距離と張力検出
ロールの押し込み量とから、巻付け角が求められること
を説明した説明図である。
FIG. 3 is an explanatory diagram illustrating that a wrapping angle is obtained from a distance between two deflector rolls and a pushing amount of a tension detecting roll.

【符号の説明】[Explanation of symbols]

1 ストリップ 2 デフレクターロール 3 張力検出ロール 4 昇降装置 5 ロードセル5 6 張力演算器 7 位置検出器 8 設定器 9 張力比較器 10 昇降制御器 1 Strip 2 Deflector Roll 3 Tension Detecting Roll 4 Lifting Device 5 Load Cell 5 6 Tension Calculator 7 Position Detector 8 Setting Device 9 Tension Comparator 10 Lifting Controller

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 プロセスラインに設けた張力検出ロール
にストリップを巻き付けて、ストリップにかかる張力を
ロードセルで計測するプロセスラインの張力計測方法に
おいて、計測するストリップの張力に応じて、張力検出
ロールに巻き付けたストリップの巻付け角を段階的に切
り換えて張力を計測することを特徴とするプロセスライ
ンの張力計測方法。
1. A process line tension measuring method in which a strip is wound around a tension detecting roll provided in a process line and the tension applied to the strip is measured by a load cell. The tension detecting roll is wound according to the tension of the strip to be measured. A method for measuring tension in a process line, which comprises measuring the tension by switching the winding angle of the strip in stages.
JP5297643A 1993-11-29 1993-11-29 Method for measuring tension of process line Withdrawn JPH07151622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5297643A JPH07151622A (en) 1993-11-29 1993-11-29 Method for measuring tension of process line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5297643A JPH07151622A (en) 1993-11-29 1993-11-29 Method for measuring tension of process line

Publications (1)

Publication Number Publication Date
JPH07151622A true JPH07151622A (en) 1995-06-16

Family

ID=17849244

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5297643A Withdrawn JPH07151622A (en) 1993-11-29 1993-11-29 Method for measuring tension of process line

Country Status (1)

Country Link
JP (1) JPH07151622A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108387453A (en) * 2018-05-30 2018-08-10 广州建设工程质量安全检测中心有限公司 A kind of detecting system and method for building enclosure component resistance to vertical load performance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108387453A (en) * 2018-05-30 2018-08-10 广州建设工程质量安全检测中心有限公司 A kind of detecting system and method for building enclosure component resistance to vertical load performance

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