JPH04154916A - Method for operating seamless pipe manufacturing plant - Google Patents
Method for operating seamless pipe manufacturing plantInfo
- Publication number
- JPH04154916A JPH04154916A JP2275678A JP27567890A JPH04154916A JP H04154916 A JPH04154916 A JP H04154916A JP 2275678 A JP2275678 A JP 2275678A JP 27567890 A JP27567890 A JP 27567890A JP H04154916 A JPH04154916 A JP H04154916A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- pitch
- cooling bed
- heating furnace
- extraction pitch
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000003303 reheating Methods 0.000 claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 238000011017 operating method Methods 0.000 claims abstract description 4
- 238000000605 extraction Methods 0.000 claims description 54
- 239000000463 material Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 239000003638 chemical reducing agent Substances 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
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
- B21B37/005—Control of time interval or spacing between workpieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Control Of Heat Treatment Processes (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、加熱炉からのビレットの抽出ピッチおよび
再熱炉からの圧延材の抽出ピッチを適正に制御して、圧
延材の冷却床出側ての温度を目標温度以下に維持するよ
うにした継目無管製造工場の操業方法に関する。Detailed Description of the Invention [Industrial Field of Application] The present invention properly controls the extraction pitch of billets from a heating furnace and the extraction pitch of rolled material from a reheating furnace, thereby allowing the rolling material to exit the cooling bed. The present invention relates to a method of operating a seamless pipe manufacturing factory that maintains the temperature at the side below a target temperature.
［従来の技術］
継目無管は、例えば、第２図に示すような製造ラインに
より製造される。すなわち、回転式のヒレット加熱炉２
１により丸ビレットか所定の温度に加熱され、ピアサ−
２２により丸ビレットの中心に貫通孔が穿孔される。そ
して、マンドレルミル２３て所定の外径および肉厚に近
い形状まで圧延され、再熱炉２４で再加熱される。再加
熱後ストレッチレジューサ−２５により、最終寸法の継
目無管か形成され、冷却床２６で冷却された後、精整ラ
イン２７に送られる。[Prior Art] Seamless pipes are manufactured, for example, on a manufacturing line as shown in FIG. That is, the rotary hillet heating furnace 2
1, the round billet is heated to a predetermined temperature and pierced.
22, a through hole is bored in the center of the round billet. Then, it is rolled in a mandrel mill 23 to a shape close to a predetermined outer diameter and wall thickness, and then reheated in a reheating furnace 24. After reheating, the stretch reducer 25 forms a seamless tube of final size, which is cooled on a cooling bed 26 and then sent to a finishing line 27.
このような継目無管の製造工場において、加熱炉の抽出
ピッチは、
（１）ローリングスケジュール等により定まるミル等の
各工程の能力を勘案し、一番ネツクとなる工程の能力に
応じて決定する、
（２）ライン途中のバッファ上の圧延材の滞留本数等に
よって決定する、 ′
等が一般的である。In such a seamless pipe manufacturing factory, the extraction pitch of the heating furnace is determined according to the capacity of the most critical process, taking into account the capacity of each process such as the mill, which is determined by the rolling schedule, etc. , (2) Determined by the number of rolled materials retained on the buffer in the middle of the line, etc. ' is common.
［発明か解決しようとする課題］
しかしなから、従来の加熱炉の抽出ピッチ決定方法にお
いては、製造ラインのレイアウト等の条件により、冷却
床出側での継目無鋼管の温度をある温度以下にする必要
がある場合には、最適抽出ピッチを得ることができずに
、ラインを部分的に停止したり、ライン上の圧延材を間
引いたりして冷却床出側ての継目無鋼管の温度をある温
度以下にするという作業を強いられるので、製造ライン
の稼働率が低下するという問題点があった。[Problem to be solved by the invention] However, in the conventional heating furnace extraction pitch determination method, depending on conditions such as the layout of the production line, the temperature of the seamless steel pipe at the outlet side of the cooling bed must be kept below a certain temperature. If necessary, if the optimal extraction pitch cannot be obtained, the line may be partially stopped or the rolled material on the line may be thinned out to lower the temperature of the seamless steel pipe at the outlet of the cooling bed. There was a problem in that the operating rate of the production line decreased because the work was forced to lower the temperature below a certain level.
この発明は、従来技術の上記のような問題点を解消し、
冷却床出側での継目無鋼管の温度を所定温度になるよう
に再熱炉の抽出ピッチを制御することにより、ラインを
部分的に停止したり、ライン上の圧延材を間引いたりす
ることなしに継目無管の製造ができる継目無管製造工場
の操業方法を提供することを目的としている。This invention solves the above-mentioned problems of the prior art,
By controlling the extraction pitch of the reheating furnace so that the temperature of seamless steel pipes at the outlet side of the cooling bed reaches a predetermined temperature, there is no need to partially stop the line or thin out the rolled material on the line. The purpose of this study is to provide a method for operating a seamless pipe manufacturing plant that can manufacture seamless pipes.
［課題を解決するための手段］
この発明に係る継目無管製造工場の操業方法は、加熱炉
、再熱炉および冷却床を有する継目無管製造工場の操業
方法において、加熱炉からのビレットの抽出ピッチを、
一番のネック工程である工程の能力以上にならないよう
にするとともに、冷却床出側で圧延された圧延材の温度
を測定し、測定した温度が目標温度より高い場合には、
再熱炉の抽出ピッチを圧延材の再熱炉滞留可能最長時間
以下の範囲で延ばして圧延材の再熱炉から冷却床への単
位時間当たりの流入本数を減少させるとともに、延ばし
た再熱炉の抽出ピッチが加熱炉の抽出ピッチよりも遅い
ときには、加熱炉の抽出ピッチを再熱炉の抽出ピッチに
合わせて遅くする継目無管製造工場の操業方法である。[Means for Solving the Problems] A method of operating a seamless pipe manufacturing factory according to the present invention includes a method of operating a seamless pipe manufacturing factory having a heating furnace, a reheating furnace, and a cooling bed. Extract pitch,
In addition to ensuring that the temperature does not exceed the capacity of the process, which is the biggest bottleneck process, the temperature of the rolled material at the exit side of the cooling bed is measured, and if the measured temperature is higher than the target temperature,
The extraction pitch of the reheating furnace is extended to a range that is less than the maximum time that the rolled material can stay in the reheating furnace, thereby reducing the number of rolled materials flowing from the reheating furnace to the cooling bed per unit time. When the extraction pitch of the heating furnace is slower than the extraction pitch of the heating furnace, the extraction pitch of the heating furnace is slowed down to match the extraction pitch of the reheating furnace.
［作用］
この発明に係る継目無管製造工場の操業方法は、加熱炉
、再熱炉および冷却床を存する継目無管製造工場の操業
方法において、加熱炉からのビレットの抽出ピッチを、
一番のネック工程である工程の能力以上にならないよう
にするとともに、冷却床出側で圧延された圧延材の温度
を測定し、測定した温度が目標温度より高い場合には、
再熱炉の抽出ピッチを圧延材の再熱炉滞留可能最長時間
以下の範囲て延ばして圧延材の再熱炉から冷却床への単
位時間当たりの流入本数を減少させるとともに、延ばし
た再熱炉の抽出ピッチが加熱炉の抽出ピッチよりも遅い
ときには、加熱炉の抽出ピッチを再熱炉の抽出ピッチに
合わせて遅くするようにしている。このようにしている
ので、継目無管の冷却床出側での温度が上がりすぎて、
ラインの一部を停止したり、ライン上にある圧延材の一
部を間引いたりすることがなく、継目無管製造工場の稼
働率を向上させることができる。[Function] The method of operating a seamless pipe manufacturing factory according to the present invention is a method of operating a seamless pipe manufacturing factory that includes a heating furnace, a reheating furnace, and a cooling bed, in which the extraction pitch of billets from the heating furnace is
In addition to ensuring that the temperature does not exceed the capacity of the process, which is the biggest bottleneck process, the temperature of the rolled material at the exit side of the cooling bed is measured, and if the measured temperature is higher than the target temperature,
A reheating furnace that extends the extraction pitch of the reheating furnace to a range that is less than the maximum time that the rolled material can stay in the reheating furnace to reduce the number of rolled materials flowing from the reheating furnace to the cooling bed per unit time. When the extraction pitch of the heating furnace is slower than the extraction pitch of the heating furnace, the extraction pitch of the heating furnace is slowed down to match the extraction pitch of the reheating furnace. Because this is done, the temperature at the exit side of the cooling bed of the seamless pipes will rise too much.
The operating rate of a seamless pipe manufacturing factory can be improved without stopping part of the line or thinning out part of the rolled material on the line.
［実施例］
本発明の１実施例の継目無管製造工場の操業方法を、第
１図により説明する。本発明の１実施例＝ ５ ＝
の継目無管製造工場の操業方法においては、第２図にお
いて示した冷却床２６の出側に、圧延された継目無管の
温度を測定する冷却床温度計１を設けて、通過する継目
無管の温度を測定している。[Example] A method of operating a seamless pipe manufacturing factory according to an example of the present invention will be explained with reference to FIG. 1. In the operating method of a seamless pipe manufacturing factory according to one embodiment of the present invention = 5 =, a cooling bed thermometer for measuring the temperature of the rolled seamless pipe is installed on the outlet side of the cooling bed 26 shown in FIG. 1 is installed to measure the temperature of the seamless pipe passing through it.
そして、測定した温度の信号は、時々刻々再熱炉抽出ピ
ッチ演算手段２に送られている。この温度が継目無管の
寸法や鋼種により設定された温度（Ｔ）に対して＋α高
くなると、再熱炉抽出ピッチ演算手段２により設定され
た温度（Ｔ）に戻すための再熱炉抽出ピッチ変更量が演
算される。そして、その演算結果に応じた抽出ピッチ変
更指令が再熱炉抽出ピッチ制御手段３に送られ、再熱炉
の抽出ピッチが遅くなるように制御される。また、同時
に再熱炉抽出ピッチ演算手段２により演算された演算結
果は加熱炉抽出ピッチ演算手段４に送られ、それまでの
加熱炉抽出ピッチと比較されて、再熱炉の変更後の抽出
ピッチが加熱炉の今までの抽出ピッチよりも遅いときに
は、その差に応じた加熱炉抽出ピッチの変更量が加熱炉
抽出ピッチ演算手段４で演算される。そして、その演算
結果に応じた抽出ピッチ変更指令が加熱炉抽出ピッチ制
御手段５に送られ、加熱炉の抽出ピッチか遅くなるよう
に制御される。The measured temperature signal is sent to the reheating furnace extraction pitch calculating means 2 from time to time. When this temperature becomes +α higher than the temperature (T) set by the dimensions and steel type of the seamless pipe, the reheating furnace extraction pitch is used to return to the temperature (T) set by the reheating furnace extraction pitch calculation means 2. The amount of change is calculated. Then, an extraction pitch change command according to the calculation result is sent to the reheating furnace extraction pitch control means 3, and the extraction pitch of the reheating furnace is controlled to be slow. At the same time, the calculation result calculated by the reheating furnace extraction pitch calculation means 2 is sent to the heating furnace extraction pitch calculation means 4, and compared with the previous heating furnace extraction pitch, the extraction pitch after the change of the reheating furnace is determined. is slower than the existing extraction pitch of the heating furnace, the heating furnace extraction pitch calculating means 4 calculates the amount of change in the heating furnace extraction pitch according to the difference. Then, an extraction pitch change command corresponding to the calculation result is sent to the heating furnace extraction pitch control means 5, and the extraction pitch of the heating furnace is controlled to become slower.
上記のように再熱炉抽出ピッチを遅くしたことにより、
継目無管の温度か設定温度（Ｔ）に対して−α低くなる
と、設定された温度（Ｔ）に戻すための抽出ピッチの変
更量か再熱炉抽出ピッチ演算手段２により演算され、再
熱炉抽出ピッチ制御手段３により、再熱炉抽出ピッチか
もとの抽出ピッチに戻される。そして、同様に、加熱炉
抽出ピッチ演算手段４ても加熱炉抽出ピッチの変更量か
演算され、加熱炉抽出ピッチ制御手段５により、加熱炉
抽出ピッチか再熱炉の抽出ピッチに合うように変更され
る。By slowing down the reheating furnace extraction pitch as described above,
When the temperature of the seamless pipe becomes -α lower than the set temperature (T), the amount of change in the extraction pitch to return to the set temperature (T) is calculated by the reheating furnace extraction pitch calculation means 2, and the reheating The furnace extraction pitch control means 3 returns the reheating furnace extraction pitch to the original extraction pitch. Similarly, the heating furnace extraction pitch calculation means 4 also calculates the amount of change in the heating furnace extraction pitch, and the heating furnace extraction pitch control means 5 changes the heating furnace extraction pitch to match the extraction pitch of the reheating furnace. be done.
［発明の効果］
この発明により、ラインを停止したり圧延材を間引いた
りすることなしに、継目無管の冷却床出側での温度を目
標温度以下に維持することかできる。[Effects of the Invention] According to the present invention, the temperature at the exit side of the cooling bed of the seamless pipe can be maintained at a target temperature or lower without stopping the line or thinning out the rolled material.
第１図は本発明の１実施例の継目無管製造工場の操業方
法を実施するための機器構成を示すブロック図、第２図
は継目無管製造工場のレイアウトを示す配置図である。
ｌ・・・冷却床温度計、２・・再熱炉抽出ピッチ演算手
段、３・・・再熱炉抽出ピッチ制御手段、４・・加熱炉
抽出ピッチ演算手段、５・・加熱炉抽出ピンチ制御手段
。FIG. 1 is a block diagram showing the equipment configuration for carrying out the operating method of a seamless pipe manufacturing factory according to an embodiment of the present invention, and FIG. 2 is a layout diagram showing the layout of the seamless pipe manufacturing factory. 1. Cooling bed thermometer, 2. Reheating furnace extraction pitch calculation means, 3. Reheating furnace extraction pitch control means, 4. Heating furnace extraction pitch calculation means, 5. Heating furnace extraction pinch control. means.
Claims (1)
の操業方法において、加熱炉からのビレットの抽出ピッ
チを、一番のネック工程である工程の能力以上にならな
いようにするとともに、冷却床出側で圧延された圧延材
の温度を測定し、測定した温度が目標温度より高い場合
には、再熱炉の抽出ピッチを圧延材の再熱炉滞留可能最
長時間以下の範囲で延ばして圧延材の再熱炉から冷却床
への単位時間当たりの流入本数を減少させるとともに、
延ばした再熱炉の抽出ピッチが加熱炉の抽出ピッチより
も遅いときには、加熱炉の抽出ピッチを再熱炉の抽出ピ
ッチに合わせて遅くすることを特徴とする継目無管製造
工場の操業方法。In the operating method of a seamless pipe manufacturing plant that has a heating furnace, a reheating furnace, and a cooling bed, the extraction pitch of billets from the heating furnace should not exceed the capacity of the process, which is the biggest bottleneck process, and the cooling Measure the temperature of the rolled material on the exit side, and if the measured temperature is higher than the target temperature, extend the extraction pitch of the reheating furnace to a range that is less than the maximum time that the rolled material can stay in the reheating furnace. In addition to reducing the number of rolled materials flowing from the reheating furnace to the cooling bed per unit time,
A method for operating a seamless pipe manufacturing factory, characterized in that when the extended extraction pitch of the reheating furnace is slower than the extraction pitch of the heating furnace, the extraction pitch of the heating furnace is slowed to match the extraction pitch of the reheating furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2275678A JPH04154916A (en) | 1990-10-15 | 1990-10-15 | Method for operating seamless pipe manufacturing plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2275678A JPH04154916A (en) | 1990-10-15 | 1990-10-15 | Method for operating seamless pipe manufacturing plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04154916A true JPH04154916A (en) | 1992-05-27 |
Family
ID=17558824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2275678A Pending JPH04154916A (en) | 1990-10-15 | 1990-10-15 | Method for operating seamless pipe manufacturing plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04154916A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0688121A (en) * | 1992-09-07 | 1994-03-29 | Mitsui Eng & Shipbuild Co Ltd | Method for discharging material to be heated in induction heating apparatus and device therefor |
| JP2007283316A (en) * | 2006-04-13 | 2007-11-01 | Nippon Steel Corp | Method for producing thick steel plate |
| US20130074563A1 (en) * | 2010-01-05 | 2013-03-28 | Sms Innse Spa | Tube rolling plant |
-
1990
- 1990-10-15 JP JP2275678A patent/JPH04154916A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0688121A (en) * | 1992-09-07 | 1994-03-29 | Mitsui Eng & Shipbuild Co Ltd | Method for discharging material to be heated in induction heating apparatus and device therefor |
| JP2007283316A (en) * | 2006-04-13 | 2007-11-01 | Nippon Steel Corp | Method for producing thick steel plate |
| US20130074563A1 (en) * | 2010-01-05 | 2013-03-28 | Sms Innse Spa | Tube rolling plant |
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