JPH0347621A - Coil diameter arithmetic unit - Google Patents

Coil diameter arithmetic unit

Info

Publication number
JPH0347621A
JPH0347621A JP1181406A JP18140689A JPH0347621A JP H0347621 A JPH0347621 A JP H0347621A JP 1181406 A JP1181406 A JP 1181406A JP 18140689 A JP18140689 A JP 18140689A JP H0347621 A JPH0347621 A JP H0347621A
Authority
JP
Japan
Prior art keywords
coil diameter
correction value
plate thickness
coil
average
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.)
Granted
Application number
JP1181406A
Other languages
Japanese (ja)
Other versions
JP2624841B2 (en
Inventor
Masatoshi Masumori
増森　正敏
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP1181406A priority Critical patent/JP2624841B2/en
Publication of JPH0347621A publication Critical patent/JPH0347621A/en
Application granted granted Critical
Publication of JP2624841B2 publication Critical patent/JP2624841B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control
    • B21B37/52—Tension control; Compression control by drive motor control
    • B21B37/54—Tension control; Compression control by drive motor control including coiler drive control, e.g. reversing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0057—Coiling the rolled product

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

PURPOSE:To operate a coil diameter with high accuracy by operating the correction value of the coil diameter of a grip part corresponding to the grip position based on the set plate thickness and the average coil diameter and adding the operated value to the average coil diameter. CONSTITUTION:An arithmetic means 8 for a coil diameter correction value operates based on the set plate thickness of a plate thickness setting device 7, further, a coil diameter correction DELTAr is operated based on a grip position thetadetected by this operated result and a grip position detecting means 6 and the average coil diameter (r) operated by a coil diameter operating means 9. Besides, an adder 10 adds this coil diameter correction value DELTAr and the average coil diameter (r) of the coil diameter arithmetic means 9 and outputs a correction coil diameter r'. In this way, the coil diameter can be operated with high accuracy.

Description

【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） この発明は、圧延機で圧延された材料を巻取る巻取機、
または、圧延機に材料を供給する巻戻機に巻かれたコイ
ル径を、グリップ位置に対応させて演算するコイル径演
算装置に関するものである。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention relates to a winding machine that winds up material rolled by a rolling mill;
Alternatively, the present invention relates to a coil diameter calculation device that calculates the diameter of a coil wound on an unwinding machine that supplies material to a rolling mill in correspondence with a grip position.

（従来の技術） 圧延された材料の先端を巻取機のマンドレルに巻付ける
には、ベルトラッパによる方法と、グリップによる方法
とがある。(Prior Art) There are two methods for winding the tip of a rolled material around a mandrel of a winding machine: a method using a belt wrapper and a method using a grip.

このうち、グリップによる方法は材料の厚みや剛性によ
る膨らみ等により段差を生じて真円とはならず、歪みを
持つことになる。このため、巻取中の材料に作用する張
力は、グリップ位置に同期して変動する。Among these methods, the method using a grip causes a difference in level due to bulges due to the thickness and rigidity of the material, and the shape is not a perfect circle, resulting in distortion. Therefore, the tension acting on the material being wound varies synchronously with the grip position.

一方、圧延機と、巻戻機または巻戻機（以下、こらを併
せてリールという）との間の材料に作用する張力を一定
に保つことは、圧延された材料の板厚精度を確保するた
めに極めて重要である。しかし、巻取コイルが真円でな
いことに起因する張力変動は、これを分離除去すること
の難しさから無視され、真円と見做して板厚制御されて
いた。On the other hand, maintaining a constant tension acting on the material between the rolling mill and the unwinding machine or unwinding machine (hereinafter collectively referred to as the reel) ensures the thickness accuracy of the rolled material. This is extremely important. However, tension fluctuations caused by the fact that the wound coil is not a perfect circle are ignored because it is difficult to separate and remove them, and the plate thickness is controlled assuming that the winding coil is a perfect circle.

ところで、近年は板厚精度の高いものが要求されるよう
になり、巻取コイルが真円でないことに起因する張力変
動分を無視できなくなってきている。Incidentally, in recent years, there has been a demand for highly accurate plate thicknesses, and it has become impossible to ignore tension fluctuations caused by the fact that the wound coil is not a perfect circle.

そこで、圧延機の荷重や、圧延機とリールとの間の材料
張力をｎ１定し、リール回転周波数に同期した信号のみ
を通す狭帯域フィルタにより、張力変動分を取出してこ
れを補正する装置が、例えば、特開昭６２−２４８８１
９号公報に開示されている。Therefore, a device that fixes the load of the rolling mill and the material tension between the rolling mill and the reel by using a narrow band filter that passes only signals synchronized with the reel rotation frequency, extracts the tension fluctuation and corrects it. , for example, JP-A-62-24881
It is disclosed in Publication No. 9.

以下、この公開公報に示された張力補正装置を、第４図
を用いて簡単に説明する。Hereinafter, the tension correction device disclosed in this publication will be briefly explained using FIG. 4.

第４図において、圧延機１の出側に設けられたデフレク
タロール２を通って、材料５はリールのマンドレル３に
巻取られてコイル４となる。このうち、圧延機１とデフ
レクタロール２との間に張力検出器１１が設けられ、そ
の検出値が狭帯域フィルタ１２に入力される。また、リ
ールを駆動するリール駆動装置１４には、その回転を検
出する回転検出装置１５が結合され、回転位置信号が狭
帯域フィルタ１２に入力される。これにより、狭帯域フ
ィルタ１２からはリールの回転に同期した張力偏差分が
出力される。このようにして得られた張力偏差分は回転
検出装置１５の回転位置信号と共に、張力偏差保存装置
１７に加えられ、回転位置に対応させて記憶装置１８に
保存される。また、回転検出装置１５の出力信号は張力
偏差取出装置１９にも加えられ、リールの回転に同期さ
せて張力偏差分が読み出される。この張力偏差分は張力
設定器１３の張力設定値と共に、リール張力制御装置２
０に加えられる。リール張力制御装置２０は張力設定器
１３の張力設定値を張力偏差分で補正して、リール駆動
装置１４を駆動する電源装置２１を制御する。In FIG. 4, the material 5 passes through a deflector roll 2 provided on the exit side of the rolling mill 1 and is wound onto a mandrel 3 of a reel to form a coil 4. Among these, a tension detector 11 is provided between the rolling mill 1 and the deflector roll 2, and its detected value is input to a narrow band filter 12. Furthermore, a rotation detection device 15 that detects the rotation of the reel is coupled to the reel drive device 14 that drives the reel, and a rotation position signal is input to the narrow band filter 12 . As a result, the narrowband filter 12 outputs a tension deviation component that is synchronized with the rotation of the reel. The tension deviation thus obtained is added to the tension deviation storage device 17 together with the rotational position signal from the rotation detection device 15, and is stored in the storage device 18 in correspondence with the rotational position. Further, the output signal of the rotation detection device 15 is also applied to the tension deviation extraction device 19, and the tension deviation amount is read out in synchronization with the rotation of the reel. This tension deviation is calculated by the reel tension control device 2 along with the tension setting value of the tension setting device 13.
Added to 0. The reel tension control device 20 corrects the tension setting value of the tension setting device 13 by the tension deviation amount and controls the power supply device 21 that drives the reel drive device 14.

かくして、リールのコイル径か真円でないことに起因す
る張力変動分が補正され、板厚精度の高い製品が得られ
る。In this way, tension fluctuations caused by the reel coil diameter being not a perfect circle are corrected, and a product with high plate thickness accuracy can be obtained.

（発明が解決Ｃようとする課題） 上述した張力補正装置は、コイルが真円でないことに起
因する張力変動を確実に除去できるものではある。しか
し、この装置は構成が複雑で高価であるがために、母材
の板厚変動分、圧延機ロールの偏芯、熱等に起因する張
力変動をも除去して板厚精度の高いものを得るものに適
当である。しかし、コイルが真円でないことに起因する
張力変動分、すなわち、板厚に最も大きな影響を及ぼす
張力変動分の除去を主眼とする場合には、装置が高価す
ぎて、汎用の装置たり得なかった。(Problem to be Solved by the Invention C) The tension correction device described above can reliably eliminate tension fluctuations caused by the coil not being perfectly circular. However, this equipment has a complicated configuration and is expensive, so it eliminates tension fluctuations caused by changes in the thickness of the base material, eccentricity of rolling mill rolls, heat, etc. It's appropriate for what you get. However, if the main objective is to remove the tension fluctuations caused by the coil not being a perfect circle, that is, the tension fluctuations that have the greatest effect on the plate thickness, the equipment is too expensive and cannot be used as a general-purpose equipment. Ta.

本来、コイル径が真円でないことに起因する張力変動の
除去は、必ずしも、張力検出値を用いる必要はなく、例
えば、特公昭５０−２２１９２号公報に示されたように
、コイル径に基づいて張力制御する技術を用いるならば
、歪みを持ったコイル径を演算するだけでグリップに起
因する張力変動を除去することができる。Originally, it is not necessary to use the detected tension value to remove tension fluctuations caused by the coil diameter being not a perfect circle. If tension control technology is used, tension fluctuations caused by the grip can be removed simply by calculating the distorted coil diameter.

しかし、従来はグリップに起因して歪んだコイル径を求
めようとしても、これを演算する装置がなく、従ってコ
イル径を基準にして張力変動））を除去することができ
なかった。However, in the past, even if an attempt was made to determine the coil diameter distorted due to the grip, there was no device for calculating this, and therefore it was not possible to eliminate tension fluctuations based on the coil diameter.

この抛明は上記の問題点を解決するためになされたもの
で、グリップに起因して歪みを持ったコイル径を比較的
高精度で演算し得、これを用いることによって、グリッ
プに起因する張力変動を容易に除去することのできるコ
イル径演算装置を？）ることを目的とする。This technique was developed to solve the above problem, and it is possible to calculate the diameter of the coil that is distorted due to the grip with relatively high accuracy. A coil diameter calculation device that can easily remove fluctuations? )The porpose is to do.

【発明の構成〕[Structure of the invention]

（Ｅｌｍを解決するための手段） この発明は、圧延機で圧延された材料を巻取る巻取機、
または、圧延機に材料を供給する巻戻機のグリップ位置
を検出するグリップ位置検出手段と、材料の板厚を設定
する板厚設定器と、前記巻取機または巻戻機に巻かれた
コイルの・１４均コイル径を演算するコイル径演算手段
と、前記板厚設定器の設定板厚および前記コイル径演算
手段で演算された平均コイル径とに基づき、グリップ部
分のコイル径補正値を演算すると共に、検出された前記
グリップ位置に対応させて出力する補正値ａ算手段と、
この補正値演算手段のコイル径補正値を前記コイル径演
算手段で演算された平均コイル径に加算して出力する加
算器とを備えたことを特徴とするものである。(Means for solving Elm) This invention provides a winding machine that winds up material rolled by a rolling mill;
Alternatively, a grip position detection means for detecting the grip position of an unwinding machine that supplies material to the rolling mill, a thickness setting device for setting the thickness of the material, and a coil wound on the winding machine or the unwinding machine. A coil diameter calculation means for calculating a 14-average coil diameter, and a coil diameter correction value for the grip portion is calculated based on the set plate thickness of the plate thickness setting device and the average coil diameter calculated by the coil diameter calculation means. and a correction value a calculation means that outputs a correction value a corresponding to the detected grip position;
The present invention is characterized by comprising an adder that adds the coil diameter correction value of the correction value calculation means to the average coil diameter calculated by the coil diameter calculation means and outputs the result.

（作　用） この発明においては、グリップに起因するコイル径の歪
み分が、おおよそ、板厚と一１シ均コイル径によって決
まることに着目し、設定板厚および」シ均コイル径に基
づいて、グリップ部分のコイル径補正値をグリップ位置
に対応させて演算し、このコイル径補正値を平均コイル
径に加えてコイル径を求めている。(Function) In this invention, focusing on the fact that the distortion in the coil diameter caused by the grip is approximately determined by the plate thickness and the uniform coil diameter, , a coil diameter correction value for the grip portion is calculated in correspondence with the grip position, and this coil diameter correction value is added to the average coil diameter to obtain the coil diameter.

（実施例） 第１図はこの発明の一実施例の概略構成図で、図中、第
４図と同一の要素には同一のね号を付してその説明を省
略する。ここでは、マンドレル３に結合することにより
グリップ位置θを検出するグリップ位置検出手段６と、
圧延板厚ｔを設定する板厚設定器７と、マンドレル３の
回転および材料５の移動距離に基づいてコイル４の平均
コイル径ｒを演算するコイル径演算手段９と、グリップ
位置θ、設定板厚ｔおよび平均コイル径ｒに基づいて、
グリップ部分の歪み量、すなわち、コイル径補正値Δｒ
を演算するコイル径補正値演算手段８と、このコイル径
補正値Δ「をコイル径演算子段９の平均コイル径ｒに加
算してコイル径ｒ′を出力する加算器１０とを備えた構
成になっている。(Embodiment) FIG. 1 is a schematic configuration diagram of an embodiment of the present invention. In the figure, the same elements as those in FIG. Here, grip position detection means 6 detects the grip position θ by being coupled to the mandrel 3;
A plate thickness setting device 7 that sets the rolled plate thickness t, a coil diameter calculation means 9 that calculates the average coil diameter r of the coil 4 based on the rotation of the mandrel 3 and the moving distance of the material 5, and a grip position θ and a setting plate. Based on the thickness t and average coil diameter r,
The amount of distortion in the grip portion, that is, the coil diameter correction value Δr
, and an adder 10 that adds the coil diameter correction value Δ' to the average coil diameter r of the coil diameter operator stage 9 and outputs the coil diameter r'. It has become.

なお、コイル径演算手段つとしては、マンドレル３の回
転数と、材料５の移動距離に対応するデフレクタロール
２の回転数とに基づいて算出する周知のものを用いてい
る。As the coil diameter calculating means, a well-known method is used which calculates based on the rotational speed of the mandrel 3 and the rotational speed of the deflector roll 2 corresponding to the moving distance of the material 5.

上記のように構成された本実施例の動作を以ドに説明す
る。The operation of this embodiment configured as described above will be explained below.

圧延機１により圧延された材料５は、デフレクタロール
２を通して、マンドレル３に巻き付けられ、・コイル４
として巻き取られる。このとき、材料５の先端はマンド
レル３にグリップされるが、材料５の弾性や、板厚その
ものによりマンドレル３の表面に対して滑らかには巻き
付かず、膨らみを生じてしまう。その様子を第２図に示
す。ユニで、平均コイル径「に、グリップ部分のコイル
径補正値Δｒを加算すると補正コイル径ｒ′が得られる
が、コイル径補正値Δｒのピーク値Δｒ　は次式で演算
することができる。The material 5 rolled by the rolling mill 1 is passed through a deflector roll 2 and wound around a mandrel 3, and is wound around a coil 4.
It is wound up as. At this time, the tip of the material 5 is gripped by the mandrel 3, but due to the elasticity of the material 5 and the thickness itself, it does not wrap smoothly around the surface of the mandrel 3, resulting in a bulge. The situation is shown in Figure 2. In Uni, the corrected coil diameter r' is obtained by adding the coil diameter correction value Δr of the grip portion to the average coil diameter ``, but the peak value Δr of the coil diameter correction value Δr can be calculated by the following equation.

Δｒ　　−ｆ　（ｔ、　Ｔ、　　Ｅ）　　　　＝・（１
）ただし ｔ：設定板厚 Ｔ：ユニット張力 Ｅ：材質によって決まる係数 である。Δr −f (t, T, E) =・(1
) However, t: Set plate thickness T: Unit tension E: It is a coefficient determined by the material.

一方、グリップ部分の周方向距離をｇとすると、コイル
径補正値Δ「は第３図（ａ）のように三角波状に変化す
るが、この周方向距離ｇは次式によりて演算することが
できる。On the other hand, if the circumferential distance of the grip part is g, the coil diameter correction value Δ'' changes in a triangular wave shape as shown in Figure 3 (a), but this circumferential distance g can be calculated using the following formula. can.

ｆＪ　−ｇ　（ｔ、　”ｒ、　　Ｅ）　　　　　　・・
・（２）ここで、第３図（ａ）に示した三角波を、第３
図（ｂ）に示すように波長ｇの正弦波と考えると、コイ
ル径補正値Δｒは次式によって演算することができる。fJ −g (t, “r, E) ・・
・(2) Here, the triangular wave shown in Figure 3(a) is
Considering a sine wave of wavelength g as shown in FIG. 2(b), the coil diameter correction value Δr can be calculated by the following equation.

Δｒ謹Δｒ　　　ｅＯ８α（θ−θ　）・・・（３）ｐ ただし α：平均コイル径の如何に拘らず波長Ωを一定にするた
めの係数 θニゲリップ位置 θ、：ビーク値Δｒ、が得られるグリップ位置である。Δr謹Δr eO8α(θ−θ )...(3)p Where α: Coefficient θ to make the wavelength Ω constant regardless of the average coil diameter.Nigerip position θ: Grip that provides the peak value Δr. It's the location.

コイル径補正値演算手段８は、板厚設定器７の設定板厚
に基づいて上記（１）　、　（２）式の演算を行い、さ
らに、この演算結果とグリップ位置検出−１段６で検出
されたグリップ位置θおよびコイル径演算手段９で演算
された平均コイル径ｒとに基づいて、θ　を基準とした
コイル周長 −ｇ／２〜十ＩＩ／２の範囲に限って（３）式の演算を
行ってコイル径補正値Δｒを演算する。The coil diameter correction value calculation means 8 calculates the above equations (1) and (2) based on the plate thickness set by the plate thickness setting device 7, and further calculates the calculation result and the grip position detection by the first stage 6. Based on the obtained grip position θ and the average coil diameter r calculated by the coil diameter calculation means 9, formula (3) is applied only within the range of the coil circumference −g/2 to 10II/2 with θ as the reference. Then, the coil diameter correction value Δr is calculated.

また、加算器１０はこのコイル径捕ｉＥ値Δｒと、コイ
ル径演算手段９の平均コイル径「とを加算して補正コイ
ル径ｒ′を出力する。Further, the adder 10 adds this coil diameter calculated iE value Δr and the average coil diameter ``of the coil diameter calculation means 9, and outputs a corrected coil diameter r'.

しかして、この修正コイル径ｒ′を、例えば、特公昭５
０−２２１９２号公報に示された張力制御装置のコイル
径とすれば、グリップに起因する張力変動を容易に補正
することができる。Therefore, this modified coil diameter r' can be changed to, for example,
By using the coil diameter of the tension control device disclosed in Japanese Patent No. 0-22192, tension fluctuations caused by the grip can be easily corrected.

なお、上記実施例では巻戻機の場合について説明したが
、本発明はこれに限定されるものではなく、巻戻機にも
適用できることは言うまでもない。In addition, although the case of the rewinding machine was demonstrated in the said Example, it cannot be overemphasized that this invention is not limited to this and can be applied also to a rewinding machine.

〔発明の効果〕〔Effect of the invention〕

以上の説明によって明らかなように１．この発明によれ
ば、板厚設定器の設定板厚およびコイル径演算手段の平
均コイル径に基づいて、コイル径補正値演算手段がグリ
ップ部分のコイル径補正値を演算すると共に、グリップ
位置に対応させて出力し、加算器がこのコイル径補正値
を平均コイル径に加えるようにしたため、コイル径を高
精度で演算することができる。また、ｑれによって、グ
リップ部のコイルの歪みに起因する張力変動を除去する
簡易な装置を提供できるという効果もある。As is clear from the above explanation, 1. According to this invention, the coil diameter correction value calculation means calculates the coil diameter correction value of the grip portion based on the set plate thickness of the plate thickness setting device and the average coil diameter of the coil diameter calculation means, and also corresponds to the grip position. Since the adder adds this coil diameter correction value to the average coil diameter, the coil diameter can be calculated with high precision. Furthermore, the q deviation has the effect that it is possible to provide a simple device that eliminates tension fluctuations caused by distortion of the coil in the grip portion.

同実施例の動作を説明するために、グリップ位置とコイ
ル径補正値との関係を示した線図、第４図は本発明を張
力制御に適用ｌ−たと同様な制御を行う、従来の張力制
御装置を示し、たブロック図である。In order to explain the operation of this embodiment, a diagram showing the relationship between the grip position and the coil diameter correction value, and FIG. 4 is a diagram showing the relationship between the grip position and the coil diameter correction value. FIG. 2 is a block diagram showing a control device.

１・・・圧延機、２・・・デフ１ノクタロールＳ３・・
・マンドレル、４・・・コイル、５・・・材料、１６・
・・グリップ位置検出手段、７・・・板厚設定器、８・
・・コイル径補正値演算手段、９・・・コイル径演算手
段、１０・・・加算器。1...Rolling mill, 2...Differential 1 Noctarol S3...
・Mandrel, 4...Coil, 5...Material, 16.
...Grip position detection means, 7...Plate thickness setting device, 8.
... Coil diameter correction value calculation means, 9 ... Coil diameter calculation means, 10 ... Adder.

Claims (1)

【特許請求の範囲】[Claims] 圧延機で圧延された材料を巻取る巻取機、または、圧延
機に材料を供給する巻戻機のグリップ位置を検出するグ
リップ位置検出手段と、材料の板厚を設定する板厚設定
器と、前記巻取機または巻戻機に巻かれたコイルの平均
コイル径を演算するコイル径演算手段と、前記板厚設定
器の設定板厚および前記コイル径演算手段で演算された
平均コイル径とに基づき、グリップ部分のコイル径補正
値を演算すると共に、検出された前記グリップ位置に対
応させて出力する補正値演算手段と、この補正値演算手
段のコイル径補正値を前記コイル径演算手段で演算され
た平均コイル径に加算して出力する加算器とを備えたこ
とを特徴とするコイル径演算装置。Grip position detection means for detecting the grip position of a winding machine that winds up material rolled by a rolling mill or an unwinding machine that supplies material to the rolling mill; and a plate thickness setting device that sets the plate thickness of the material. , a coil diameter calculating means for calculating the average coil diameter of the coil wound on the winder or the unwinding machine, and a set plate thickness of the plate thickness setting device and the average coil diameter calculated by the coil diameter calculating means. a correction value calculation means for calculating a coil diameter correction value of the grip portion based on the above-mentioned grip position and outputting the coil diameter correction value in accordance with the detected grip position; A coil diameter calculation device comprising: an adder that adds to the calculated average coil diameter and outputs the result.
JP1181406A 1989-07-13 1989-07-13 Coil diameter calculator Expired - Fee Related JP2624841B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1181406A JP2624841B2 (en) 1989-07-13 1989-07-13 Coil diameter calculator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1181406A JP2624841B2 (en) 1989-07-13 1989-07-13 Coil diameter calculator

Publications (2)

Publication Number Publication Date
JPH0347621A true JPH0347621A (en) 1991-02-28
JP2624841B2 JP2624841B2 (en) 1997-06-25

Family

ID=16100204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1181406A Expired - Fee Related JP2624841B2 (en) 1989-07-13 1989-07-13 Coil diameter calculator

Country Status (1)

Country Link
JP (1) JP2624841B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5566524B2 (en) * 2011-03-18 2014-08-06 株式会社日立製作所 Rolling control device, rolling control method, and rolling control program

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5566524B2 (en) * 2011-03-18 2014-08-06 株式会社日立製作所 Rolling control device, rolling control method, and rolling control program

Also Published As

Publication number Publication date
JP2624841B2 (en) 1997-06-25

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