JPS6049048B2 - Leeramil control device - Google Patents
Leeramil control deviceInfo
- Publication number
- JPS6049048B2 JPS6049048B2 JP56029914A JP2991481A JPS6049048B2 JP S6049048 B2 JPS6049048 B2 JP S6049048B2 JP 56029914 A JP56029914 A JP 56029914A JP 2991481 A JP2991481 A JP 2991481A JP S6049048 B2 JPS6049048 B2 JP S6049048B2
- Authority
- JP
- Japan
- Prior art keywords
- mill
- wall thickness
- reel
- rolling
- outer diameter
- 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.)
- Expired
Links
- 238000005096 rolling process Methods 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- GZPBVLUEICLBOA-UHFFFAOYSA-N 4-(dimethylamino)-3,5-dimethylphenol Chemical compound CN(C)C1=C(C)C=C(O)C=C1C GZPBVLUEICLBOA-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/06—Rolling hollow basic material, e.g. Assel mills
- B21B19/10—Finishing, e.g. smoothing, sizing, reeling
-
- 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
- B21B37/78—Control of tube rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/08—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills
- B21B17/12—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills in a discontinuous process, e.g. plug-rolling mills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Description
【発明の詳細な説明】
本発明はリーラミルの制御装置に係り、特にプラグミ
ルから搬送される被圧延材を圧延条件の制御装置により
与えられる圧延条件下に圧延するようになされたリーラ
ミルの制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a reel mill, and more particularly to a control device for a reel mill configured to roll a material to be rolled conveyed from a plug mill under rolling conditions given by a rolling condition control device. .
リーラミルはプラグミル圧延時におけるロール 耳部
の肉厚の不均一さを是正するために使用されているが、
この形式の圧延機ではロードセル等の使用により簡単に
圧延条件を制御することがてきないため、圧延前および
圧延後の被圧延材の圧延仕様毎にロール開度、プラグ径
、フィード角度等が予め固定的に設定される。したがつ
て、圧延中の圧延実績値等のフィードバックによつて目
標外径や肉厚を自動的に制御することがてきす、製品の
仕上げ寸法形状にはばらつきが生じ、リーラミルの下流
側にさらにサイジング等の工程を設ける必要があつた。
本発明の目的はこのような従来技術の欠点を解消し、
仕上げ精度にばらつきのない製品を自動的に得ることの
できるリーラミルの制御装置を提供することにある。Leela mills are used to correct uneven wall thickness of roll ears during plug mill rolling.
In this type of rolling mill, it is not possible to easily control the rolling conditions by using load cells, etc., so the roll opening degree, plug diameter, feed angle, etc. are set in advance for each rolling specification of the material to be rolled before and after rolling. Fixed. Therefore, if the target outer diameter and wall thickness are automatically controlled by feedback of actual rolling values during rolling, there will be variations in the finished dimensions and shape of the product, and further damage will occur on the downstream side of the reel mill. It was necessary to add processes such as sizing.
The purpose of the present invention is to eliminate such drawbacks of the prior art,
An object of the present invention is to provide a control device for a reel mill that can automatically produce products with uniform finishing accuracy.
本発明は、プラグミルから搬送される被圧延管材を圧
延条件制御装置により加えられる圧延条件下に圧延する
ようになされたリーラミルの制御装置において、前記被
圧延管材の前記プラグミル出ノ側の外径および肉厚なら
びに前記リーラミル出側の目標外径に基づいて被圧延管
材のリーラミル出側の目標肉厚を演算する目標肉厚演算
装置と、前記リーラミルに供給される圧延駆動力に基づ
いて被圧延材の圧延による実績肉厚減少量を演算する肉
厚減少量演算装置と、これら目標肉厚演算装置および肉
厚減少量演算装置からの夫々の演算出力に基づいて前記
リーラミル出側の被圧延管材の外径が一定となるように
前記圧延条件制御装置の設定制御量を補正演算する演算
装置とを備えていることを特徴とする。The present invention provides a control device for a reeler mill configured to roll a tube material to be rolled conveyed from a plug mill under rolling conditions applied by a rolling condition control device. a target wall thickness calculation device that calculates a target wall thickness on the outlet side of the reeler mill of the pipe material to be rolled based on the wall thickness and a target outer diameter of the outlet side of the reeler mill; a wall thickness reduction calculation device that calculates the actual wall thickness reduction due to rolling; and a wall thickness reduction calculation device that calculates the actual wall thickness reduction amount due to rolling. It is characterized by comprising a calculation device that corrects and calculates the set control amount of the rolling condition control device so that the outer diameter is constant.
すなわち、被圧延管材の圧延中に圧延プラグのリード位
置を、リーラミル出側での鋼管の目標肉厚値からの肉厚
減少量（後述（３）式）と実圧延においてリーラミルに
供給される実績肉厚減少量（後述（４）式）との偏差に
より修正制御することによつて目標の管外径を得るよう
にしたことに特徴がある。In other words, the lead position of the rolling plug during rolling of the pipe material to be rolled is determined by the amount of wall thickness reduction from the target wall thickness value of the steel pipe at the exit side of the reel mill (Equation (3) described below) and the actual value supplied to the reel mill during actual rolling. The feature is that the target tube outer diameter is obtained by corrective control based on the deviation from the wall thickness reduction amount (Equation (4) described below).
以下本発明を図面に基づいて詳細に説明する。The present invention will be explained in detail below based on the drawings.
第１図に本発明の一実施例としてのリーラミルの制御装
置の概要を示す。図中、プラグミルの圧延ロール１で圧
延された鋼管２はリーラミルの圧延ロール１１の入側に
搬送され（図中、１２て示す）圧延ロール１１で圧延さ
れる。プラグミルの出側には鋼管２の長さを計測する長
さ計３、外径を計測する外径計牡前記計測された長さと
外径とを対応付けて記憶する記憶装置５、およびプラク
ミル出側の鋼管２の肉厚を演算する演算装置６が設けら
れている。さらに、リーラミル出側の目；標外径設定装
置７からの設定外径値ならびに前記記憶装置５および演
算装置６からのプラグミル出側の外径値および肉厚値に
基づいてリーラミル出側の鋼管の目標肉厚値を演算する
目標肉厚演算装置８が設けられている。一方、リーラミ
ルを駆動ｊするモータ１５の制御部１６からの駆動力デ
ータ（電流、電圧、回転力等）に基づいてリーラミルに
おける実績肉厚減少量を演算する肉厚減少量演算装置９
が設けられている。前記目標肉厚演算装置８および肉厚
減少量演算装置９の演算出力の差３は乗算器１０を介し
て位置決め装置１３さらにゴージ制御装置１４に接続さ
れている。その他図中、１３は自動位置決め装置を示す
。以上このような装置の制御動作について説明する。FIG. 1 shows an outline of a control device for a reel mill as an embodiment of the present invention. In the figure, a steel pipe 2 rolled by a rolling roll 1 of a plug mill is conveyed to the entry side of a rolling roll 11 of a reel mill (indicated by 12 in the diagram) and rolled by the rolling roll 11. On the outlet side of the plug mill, there are a length meter 3 for measuring the length of the steel pipe 2, an outer diameter meter for measuring the outer diameter, a storage device 5 for storing the measured length and outer diameter in association with each other, and a plug mill outlet. A calculation device 6 is provided to calculate the wall thickness of the side steel pipe 2. Further, a target for the reeler mill exit side; a steel pipe for the reeler mill exit side based on the set outer diameter value from the standard outer diameter setting device 7 and the outer diameter value and wall thickness value of the plug mill outlet side from the storage device 5 and the arithmetic device 6. A target wall thickness calculation device 8 is provided to calculate a target wall thickness value of . On the other hand, a wall thickness reduction calculation device 9 calculates the actual wall thickness reduction in the reel mill based on driving force data (current, voltage, rotational force, etc.) from the control unit 16 of the motor 15 that drives the reel mill.
is provided. The difference 3 between the calculation outputs of the target thickness calculation device 8 and the thickness reduction amount calculation device 9 is connected to a positioning device 13 and further to a gorge control device 14 via a multiplier 10. Others In the figure, 13 indicates an automatic positioning device. The control operation of such a device will be described above.
プラグミルの圧延ロール１，１で圧延された４鋼管２は
ミル出側て長さ計３により長さをまた外径計４により外
径ＤｌＡが計測され、長さに対応付けられた外径データ
が記憶装置５に記憶される。演算装置６ではプラグミル
出入側での鋼管体積を一定なものとして前記長さおよび
外径からミル出側の肉厚ＴｌＡが計算される。目標肉厚
演算装置８は目標外径Ｄ２、記憶装置５から得られる外
径ＤｌＡおよび演算装置６からの肉厚ＴｌＡに基づきか
つリーラミルの出入側で鋼管体積が一定であるものとし
て次式にしたがつてリーラミル出側の目標肉厚Ｔ２を演
算する。窩式中、ｂπ−および〒＝は夫々プラグミル出
側（すなわちリーラミル入側）の平均外径および平均肉
厚であり、ＬｌＡおよびＬ２は夫々リーラミル入側およ
び出側の長さを示す。The four steel pipes 2 rolled by the rolling rolls 1 and 1 of the plug mill are measured at the mill outlet by a length meter 3 and an outer diameter DlA by an outer diameter meter 4, and outer diameter data corresponding to the length is obtained. is stored in the storage device 5. The arithmetic unit 6 calculates the wall thickness TlA on the mill exit side from the length and outer diameter, assuming that the volume of the steel pipe on the plug mill entrance side is constant. The target wall thickness calculating device 8 uses the following formula based on the target outer diameter D2, the outer diameter DlA obtained from the storage device 5, and the wall thickness TlA from the calculating device 6, assuming that the steel pipe volume is constant on the entrance and exit sides of the reel mill. Then, the target wall thickness T2 on the exit side of the reel mill is calculated. In the cavity formula, bπ- and 〒= are the average outer diameter and average wall thickness of the plug mill exit side (ie, the reel mill entry side), respectively, and LlA and L2 represent the lengths of the reel mill entry side and exit side, respectively.
ここで入側および出側の長さを一定にして外径、肉厚を
制御するためにＬｌＡとＬ２をほぼ等しくすると前記式
（１）は近似的に次式（２）によつて示される。したが
つて目標肉厚Ｔ２を得るために必要な肉厚減少量ΔＴ２
は？式昌）て与えられる。Here, if LlA and L2 are made approximately equal in order to control the outer diameter and wall thickness by keeping the lengths of the inlet and outlet sides constant, the above equation (1) can be approximately expressed by the following equation (2). . Therefore, the wall thickness reduction amount ΔT2 required to obtain the target wall thickness T2
teeth? (Shikisho) is given.
式（３）を実行するために繭１゜図中、目標肉厚演ｉ装
置８の演算出力Ｔ２から記憶装置５の肉厚値Ｔ、９が減
算されている。In order to execute equation (3), the thickness value T, 9 of the storage device 5 is subtracted from the calculation output T2 of the target thickness calculation device 8 in the cocoon 1° diagram.
ここでプラグミル出側（リーラミル入側）の鋼管の外径
は第２Ａ図および第２Ｂ図に示すように、長さ方向に沿
つて変化しており、前記式（２）、（３）の演算は実際
には第３図に示すように外径を最大外径ＤＭＡＸと最小
外径ＤＭＯＮとの平均外径：ｈ■＝（ＤＭＡＸ＋ＤＭ，
Ｎ） ・１１２とし、これにともなつて演算装置６て計
算される肉厚を平均肉厚〒＝としたものについて行なわ
れている。Here, the outer diameter of the steel pipe on the outlet side of the plug mill (inlet side of the leeler mill) changes along the length direction, as shown in Figures 2A and 2B, and the calculations of equations (2) and (3) above are performed. In reality, as shown in Figure 3, the outer diameter is the average outer diameter of the maximum outer diameter DMAX and the minimum outer diameter DMON: h = (DMAX + DM,
N) ・112, and the wall thickness calculated by the arithmetic unit 6 is taken as the average wall thickness 〒=.
一方、リーラミルにおける実績肉厚減少量はモータ１５
に対して制御部１６から圧延中に入力されるミルの実績
電流１Ａ、実績電圧圧Ｖ１モータ回転数Ｎ１変形抵抗Ｒ
ｆおよび出側目標外径Ｄ２等から次式によつて与えられ
る。On the other hand, the actual amount of wall thickness reduction in Leela Mill is motor 15
The actual mill current 1A, the actual voltage voltage V1, the motor rotation speed N1, the deformation resistance R, which are input from the control unit 16 during rolling.
It is given by the following equation from f, the exit target outer diameter D2, etc.
但し式中、Ｕはロール径、プラグ径等によつて決定され
ている定数である。However, in the formula, U is a constant determined by the roll diameter, plug diameter, etc.
肉厚減少量演算装置９は前記式（４）にしたがう演算を
行なう。The wall thickness reduction amount calculation device 9 performs calculation according to the above equation (4).
前記目標肉厚演算装置８の演算出力とプラグミル出側平
均肉厚値との差によつて求められた式（３）の所要肉厚
減少量ΔＴ２とこの肉厚減少量演算装置９の前記式（４
）による実績肉厚減少量ΔＴＡとの差がリーラミルに対
して与えられる減肉補正量ΔＴとなる。 ΔＴ＝
ΔＴ２−ΔＴＡ・・・・（５）乗算器１０はこの演算値
としてのこの減肉補正量ΔＴをリード制御装置１４の補
正量ΔＬに変換するため所定量のゲインＫｐを乗算する
。The required wall thickness reduction amount ΔT2 of equation (3) obtained from the difference between the calculation output of the target wall thickness calculation device 8 and the average wall thickness value on the outlet side of the plug mill, and the above-mentioned equation of the wall thickness reduction amount calculation device 9. (4
) and the actual wall thickness reduction amount ΔTA becomes the thickness reduction correction amount ΔT given to the reel mill. ΔT=
ΔT2−ΔTA (5) The multiplier 10 multiplies the thinning correction amount ΔT as the calculated value by a predetermined amount of gain Kp to convert it into the correction amount ΔL of the lead control device 14.
ΔＬ＝Ｋｐ●ΔＴ ・・・・（６）
自動位置決装置１３に出力するリード設定値Ｌはリード
制御装置１４からの現在の設定値ＬＡに前記補正量ΔＬ
を加えたものとなる。ΔL=Kp●ΔT...(6)
The lead set value L output to the automatic positioning device 13 is the current set value LA from the lead control device 14 and the correction amount ΔL.
is added.
Ｌ＝ＬＡ＋ΔＬ ・・・・（７）前
記リード設定値をリーラミル圧延開始時に設定しておく
ことにより、圧延中を通してモータの制御部１６からの
実績電流等のフィードバックにより目標外径（肉厚）が
常に一定に制御される。L=LA+ΔL (7) By setting the lead setting value at the start of reel mill rolling, the target outer diameter (thickness) can be adjusted throughout rolling by feedback of actual current etc. from the motor control section 16. Always controlled at a constant level.
このように本実施例においては、プラグミル出側におい
て計測した鋼管の長さおよび外径ＤｌＡ（平均外径）か
ら演算した肉厚ＴｌＡと目標外径とに基づいて目標肉厚
Ｔ２を演算する目標肉厚演算装置８、ならびにモータ制
御装置１６からのりーラミル圧延駆動力（実績電流値等
）に基づいて実績肉厚減少量ΔＴＡを演算する肉厚減少
量演算装置を設けたことにより、前記演算装置８の目標
肉厚Ｔ２およびプラグミル出側の肉厚ＴｌＡの差によつ
て求められる所要肉厚減少量ΔＴ２と演算装置９の実績
肉厚減少量ΔＴＡとを比較してリーラミルの肉厚減少補
正量を得ることができ、これをリード制御装置１４にフ
ィードバックすることによリリーラミルの圧延条件を圧
延実績により自動的に制御して常に一定の外径および肉
厚の鋼管を高い仕上げ精度で得ることができる。前記実
施例においては、目標肉厚を得る減肉量の演算のための
データとしてのプラグミル出側（リーラミル入側）の外
径を第３図に示すように平均外径ＤｌＡとしており、こ
れによつて実用上支障のない精度での制御が可能である
。As described above, in this embodiment, the target wall thickness T2 is calculated based on the target outer diameter and the wall thickness TlA calculated from the length of the steel pipe and the outer diameter DlA (average outer diameter) measured at the exit side of the plug mill. By providing the wall thickness calculation device 8 and the wall thickness reduction amount calculation device that calculates the actual wall thickness reduction amount ΔTA based on the roller mill rolling driving force (actual current value, etc.) from the motor control device 16, the calculation device Compare the required wall thickness reduction amount ΔT2 obtained from the difference between the target wall thickness T2 of 8 and the wall thickness TlA on the outlet side of the plug mill with the actual wall thickness reduction amount ΔTA of the arithmetic unit 9 to determine the wall thickness reduction correction amount of the reeler mill. By feeding this back to the lead control device 14, it is possible to automatically control the rolling conditions of the reel mill based on the rolling results and to always obtain a steel pipe with a constant outer diameter and wall thickness with high finishing accuracy. can. In the above embodiment, the outer diameter of the plug mill outlet side (reeler mill inlet side) as data for calculating the amount of thinning to obtain the target wall thickness is the average outer diameter DlA as shown in FIG. Therefore, control can be performed with a precision that does not pose a problem in practical use.
しかし、この場合プラグミル出側の長さの計測を第４図
に示すように多数の区分（１−，／Ｎ）によつて行ない
、各区分毎に平均して求められた外径値を演算データと
して用いることもできる。このように所要減肉量を長さ
の関数として演算することにより、リード制御装置１４
の設定制御量の補正がさらに精度の高いものとなり、プ
ラグミル側の仕上げ精度に対応してリーラミル側の仕上
げ精度を常に一定なものとすることができる。However, in this case, the length of the exit side of the plug mill is measured using a large number of sections (1-, /N) as shown in Figure 4, and the average outer diameter value for each section is calculated. It can also be used as data. By calculating the required thickness reduction amount as a function of length in this way, the lead control device 14
The correction of the set control amount becomes more accurate, and the finishing accuracy on the reel mill side can always be kept constant in correspondence with the finishing accuracy on the plug mill side.
叙上のように本発明によれば、リーラミル出側における
被圧延管材の仕上げ外径を常に一定の高精度なものとす
ることができる。ノ図面の簡単な説明
第１図は本発明実施例の概要を示す説明図、第２Ａ図お
よび第２Ｂ図は夫々プラグミル出側の管材の縦断面図お
よび端面図を示すモデル図、第３図および第４図は前記
管材から外径データを得る７方法を示す説明図である。As described above, according to the present invention, the finished outer diameter of the rolled pipe material on the outlet side of the reel mill can always be kept constant and highly accurate. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing an outline of an embodiment of the present invention, FIGS. 2A and 2B are model diagrams showing a longitudinal cross-sectional view and an end view of the pipe material on the exit side of the plug mill, respectively. FIG. and FIG. 4 is an explanatory diagram showing seven methods for obtaining outer diameter data from the tube material.
Claims (1)
御装置により加えられる圧延条件下に圧延するようにな
されたリーラミルの制御装置において、前記被圧延管材
の前記プラグミル出側の外径および肉厚ならびに前記リ
ーラミル出側の目標外径設定値に基づいて被圧延管材の
リーラミル出側の目標肉厚を演算する肉厚演算装置と、
前記リーラミルに供給される圧延駆動力に基づいて被圧
延材の圧延による実積肉厚減少量を演算する肉厚減少量
演算装置と、前記目標肉厚演算装置の出力信号と前記演
算されたプラグミル出側の肉厚との偏差と、前記肉厚減
少量演算装置の出力信号との偏差を演算する偏差演算手
段とを具備し、前記偏差演算手段の出力信号に基づいて
前記リーラミルのプラグ位置を制御することを特徴とす
るリーラミルの制御装置。1. In a control device for a reel mill configured to roll a rolled tube material conveyed from a plug mill under rolling conditions applied by a rolling condition control device, the outside diameter and wall thickness of the rolled tube material on the exit side of the plug mill and the a wall thickness calculation device that calculates a target wall thickness of the rolled pipe material on the exit side of the reel mill based on a target outer diameter setting value on the exit side of the reel mill;
a wall thickness reduction amount calculation device that calculates an actual wall thickness reduction amount due to rolling of the material to be rolled based on the rolling driving force supplied to the reel mill; and an output signal of the target wall thickness calculation device and the calculated plug mill. and a deviation calculating means for calculating a deviation from the wall thickness on the outlet side and a deviation from an output signal of the wall thickness reduction amount calculating device, and the plug position of the reel mill is determined based on the output signal of the deviation calculating means. A control device for a Leela mill characterized by controlling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56029914A JPS6049048B2 (en) | 1981-03-04 | 1981-03-04 | Leeramil control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56029914A JPS6049048B2 (en) | 1981-03-04 | 1981-03-04 | Leeramil control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57146412A JPS57146412A (en) | 1982-09-09 |
| JPS6049048B2 true JPS6049048B2 (en) | 1985-10-30 |
Family
ID=12289253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56029914A Expired JPS6049048B2 (en) | 1981-03-04 | 1981-03-04 | Leeramil control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6049048B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455369C (en) * | 2005-06-30 | 2009-01-28 | 宝山钢铁股份有限公司 | Feed forward control method for wall thickness of tension reducing machine |
-
1981
- 1981-03-04 JP JP56029914A patent/JPS6049048B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57146412A (en) | 1982-09-09 |
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