JPS64126B2 - - Google Patents
Info
- Publication number
- JPS64126B2 JPS64126B2 JP24215284A JP24215284A JPS64126B2 JP S64126 B2 JPS64126 B2 JP S64126B2 JP 24215284 A JP24215284 A JP 24215284A JP 24215284 A JP24215284 A JP 24215284A JP S64126 B2 JPS64126 B2 JP S64126B2
- Authority
- JP
- Japan
- Prior art keywords
- strip
- speed
- cooling
- cooling device
- sheared
- 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
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
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- 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
- B21B37/72—Rear end control; Front end control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0224—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
-
- 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
- B21B15/0007—Cutting or shearing the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2273/00—Path parameters
- B21B2273/12—End of product
- B21B2273/16—Tail or rear end
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、条材の熱間圧延ラインにおける熱間
圧延後の条材の均一冷却方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for uniformly cooling a strip after hot rolling in a strip hot rolling line.
（従来の技術）
従来の熱間圧延後の条材を冷却する一例を図に
より説明する。第３図において１は熱間圧延ライ
ンに設けられた加熱炉、２は熱間圧延機、３は走
間剪断機を示す。条材の素材である鋼片は熱間圧
延機２により圧延されて走間剪断機３により所定
の長さに切断された後、冷却装置（クーリングト
ラフ）４により冷却され、冷却床５に送られて徐
冷される。この後注文長さに従つて冷間切断機６
にて再度所定の長さに切断されて完成する。(Prior Art) An example of conventional cooling of a strip material after hot rolling will be explained with reference to the drawings. In FIG. 3, 1 is a heating furnace installed in a hot rolling line, 2 is a hot rolling mill, and 3 is a running shearing machine. Steel slabs, which are the raw material for strips, are rolled by a hot rolling mill 2 and cut into predetermined lengths by a running shearer 3, cooled by a cooling device (cooling trough) 4, and sent to a cooling bed 5. and slowly cooled. After this, according to the ordered length, cold cutting machine 6
It is then cut to a predetermined length again to complete the process.
ところが走間剪断機３で所定の長さに剪断を行
なうと第４図ａに示すごとく剪断前の条材は剪断
機の前後ともV0、即ち圧延速度で通過移動する
が、剪断後は第３図に示した冷却床５に剪断後の
条材を衝突せず取込むためには、第４図ｂ，ｃに
示すようにV1、即ち冷却床取込み速度まで加速
してやる必要がある。なぜなら冷却床５が剪断さ
れた各々の条材を１本づつ取り込むためには、剪
断条材の間隔を最低限必要な取込み長さ以上にす
る事が不可欠のためである。取り込み長さ以上の
間隔が得られないと冷却床５に１本づつの配列が
できなくなり、冷却床５上での均一な徐冷が保証
できない。このため走間剪断機３以降のテーブル
ローラー７を一般にV1で回転させておいて、走
間剪断機３による剪断後条材をV1の速度で搬送
する様にする。冷却床取込み速度V1は通常、圧
延速度V0の110〜150％程度である。しかしこの
様にすると、条材は冷却装置通過時の速度が第５
図に示される様に走間剪断機の前後で変化するパ
ターンとなり問題が生ずる。 However, when shearing is carried out to a predetermined length by the running shearer 3, as shown in Fig. 4a, the strip before shearing passes through the shearer at V 0 , that is, the rolling speed, but after shearing, the strip moves at the rolling speed. In order to take the sheared strips into the cooling bed 5 shown in FIG. 3 without colliding, it is necessary to accelerate to V 1 , that is, the cooling bed intake speed, as shown in FIGS. 4b and 4c. This is because, in order for the cooling bed 5 to take in each sheared strip one by one, it is essential that the interval between the sheared strips be equal to or longer than the minimum required length. If the interval is not greater than the intake length, it will not be possible to arrange the tubes one by one on the cooling bed 5, and uniform slow cooling on the cooling bed 5 cannot be guaranteed. For this reason, the table rollers 7 after the running shearing machine 3 are generally rotated at a speed of V1 , and the strip material after shearing by the running shearing machine 3 is conveyed at a speed of V1 . The cooling bed intake speed V 1 is usually about 110-150% of the rolling speed V 0 . However, in this case, the speed of the strip when passing through the cooling device is 5th.
As shown in the figure, a problem arises because the pattern changes before and after the running shear.
即ち、圧延後後面の冷却装置４を通過する速度
が先端部は始めV0（圧延速度）、走間剪断機３で
の条材後端剪断完了後より加速されて、V1に上
昇することとなる。この様な速度パターンにて冷
却装置４を通過させると条材長手方向に不均一の
冷却が行なわれ、長手方向の材質の均一性が保て
ないこととなり、極めて不都合であつた。 That is, the speed at which the strip passes through the cooling device 4 on the rear surface after rolling is initially V 0 (rolling speed) at the leading end, and is accelerated to V 1 after shearing of the trailing end of the strip is completed in the running shearing machine 3. becomes. When the strip passes through the cooling device 4 at such a speed pattern, non-uniform cooling occurs in the longitudinal direction of the strip, making it impossible to maintain uniformity of the material in the longitudinal direction, which is extremely inconvenient.
この様な不都合に対して特に特許情報としては
存在しないが従来から一般に行なわれている方法
として第６図ａに示す様に、冷却装置４を走間剪
断機３の前に配置し、剪断前に冷却を行なう方法
がある。しかしこの方法は均一冷却は行ないうる
が、冷却装置４による条材の冷却で条材の硬度、
強度が大きくなり、走間剪断機の能力を非常に大
きなものとしなければならず、太径の条材は剪断
不能となることがある。 As shown in Fig. 6a, there is no specific patent information regarding this kind of inconvenience, but as a conventionally commonly used method, a cooling device 4 is placed in front of the running shearer 3, and the cooling device 4 is placed in front of the running shearer 3, There is a method for cooling. However, although this method can achieve uniform cooling, the cooling of the strip by the cooling device 4 reduces the hardness of the strip.
The strength increases, and the running shearing machine must have a very large capacity, which may make it impossible to shear large-diameter strips.
又他の対策として、第６図ｂに示すように走間
剪断機３による剪断後の条材搬送速度に合せて、
冷却装置４の水量を増減させるか又は条材の速度
上昇に伴なつて特定の冷却装置セクシヨン８の水
量を制御して冷却能を保証するという方法がある
が、いずれも条材の速度アツプ率が過大で、１鋼
片を多数の条材成品に剪断する場合などは制御系
がついてゆけず有効な方法とはなり得ない。 As another measure, as shown in FIG.
There are methods to guarantee the cooling capacity by increasing or decreasing the amount of water in the cooling device 4 or by controlling the amount of water in a specific cooling device section 8 as the speed of the strip increases, but both methods depend on the speed increase rate of the strip. is too large and the control system cannot keep up with it, such as when shearing one steel piece into a large number of strip products, making it impossible to use this method effectively.
（発明が解決しようとする問題点）
本発明は前述のように、剪断後の条材を冷却す
る際の均一な冷却が困難である点の解決を計つて
なされたものである。(Problems to be Solved by the Invention) As described above, the present invention has been made to solve the problem of the difficulty in uniformly cooling the strip after shearing.
（問題点を解決するための手段）
本発明は剪断後の条材が冷却装置を通過する速
度を一定とすることにより、長さ方向の冷却不均
一を解消するもので、冷却装置の出側に条材検出
器を設け、条材が冷却装置を通過中はテーブルロ
ーラーの速度を変化させない方法を採用するもの
で、その要旨は熱間圧延機で圧延された条材を剪
断後、条材長手方向に搬送しながら冷却する方法
において、剪断後の条材が冷却装置内にある時は
一定速度で搬送し、条材後端が冷却装置を抜け出
た後は、速度を上昇させて搬送することを特徴と
する熱間圧延条材の均一冷却方法にある。(Means for Solving the Problems) The present invention eliminates non-uniform cooling in the longitudinal direction by making the speed at which the sheared strip passes through the cooling device constant. This method uses a method in which a strip detector is installed in the strip, and the speed of the table roller does not change while the strip passes through the cooling device. In the method of cooling while conveying in the longitudinal direction, when the sheared strip is in the cooling device, it is conveyed at a constant speed, and after the trailing end of the strip leaves the cooling device, the speed is increased and conveyed. The present invention provides a method for uniformly cooling a hot rolled strip material.
（実施例） 以下本発明を図を用いて説明する。(Example) The present invention will be explained below using the drawings.
第１図ａ，ｂ，ｃは本発明の説明図であり、第
２図は本発明を採用した時の条材の送り速度の説
明図である。 FIGS. 1a, b, and c are explanatory diagrams of the present invention, and FIG. 2 is an explanatory diagram of the feeding speed of the strip material when the present invention is adopted.
第１図において条材検出器９は冷却装置４の後
面直後に設けた光学的条材検出器である。該条材
検出器９により条材の先端、後端を検出するもの
で、条材検出器９により、走間剪断機３による剪
断された条材の後端を検出後、テーブローラー７
の速度制御を、テーブル速度制御装置１０を介し
て行なう。 In FIG. 1, the strip detector 9 is an optical strip detector provided immediately after the rear surface of the cooling device 4. The strip detector 9 detects the front end and rear end of the strip. After the strip detector 9 detects the rear end of the strip sheared by the running shearer 3, the table roller 7
The speed control is performed via the table speed control device 10.
第２図に条材速度とテーブルローラー７の速度
を示す。従来法と大きく異なる点は、テーブルロ
ーラー７の速度が、従来は剪断前の圧延速度に比
べて大きくとつた値で、一定であつたものが、本
発明ではテーブルローラー７の速度を条材検出器
９による条材後端検出、すなわち走関剪断された
走行条材の後端の検出により、加速して搬送し、
一定時間To（＝t1−t0）経過後再び次条材の冷却
装置内定速搬送のため減速するという点である。
t1は走間剪断機３が動作してから次にまた動作す
るまでの時間、すなわち先行の条材が走間剪断さ
れてから次の条材の走間剪断されるまでの時間で
あり、こうすることにより剪断後の次の条材は冷
却装置内を一定速度で通過させることができる。
t0は先行の条材が走間剪断されてから該先行の条
材の後端が条材検出器９で検出されるまでの時間
である。 FIG. 2 shows the speed of the strip material and the speed of the table roller 7. The major difference from the conventional method is that the speed of the table roller 7 was conventionally constant at a value larger than the rolling speed before shearing, but in the present invention, the speed of the table roller 7 is detected by detecting the strip material. By detecting the rear end of the strip by the device 9, that is, detecting the rear end of the running strip that has been sheared, the strip is accelerated and conveyed.
After a certain period of time To (=t 1 −t 0 ) has elapsed, the speed is reduced again in order to transport the next strip at a constant speed within the cooling device.
t1 is the time from when the running shearing machine 3 operates until it operates again, that is, the time from when the preceding strip is sheared to when the next strip is sheared, By doing so, the next strip after shearing can be passed through the cooling device at a constant speed.
t 0 is the time from when the preceding strip is sheared during running until the trailing end of the preceding strip is detected by the strip detector 9.
ここで、走間剪断とは条材が走行している間に
該条材を剪断することを言い、又条材冷却装置内
とはクーリングトラフと云われるもので筒形状と
なつており、この筒内に条材を貫通させ筒内に水
を流すことにより条材を冷却することである。尚
前記において次条材が剪断されるまでの間、その
先端部は既に冷却装置内に入つている場合が多い
が、この時の条材の速度は熱間圧延機２の速度に
律速され、テーブルローラー７の速度とはなら
ず、条材とテーブルローラー間ではスベリが起き
ている。又前記一定時間Toがゼロより小さい場
合、即ち冷却装置４の長さが剪断後の条材長さよ
り十分大きい場合は、先行条材の後端が冷却装置
を抜ける前に、次条材の剪断が完了することとな
り、Toがとれない事となる。このような場合は、
テーブルローラー７を分割、即ち冷却装置長さ内
のテーブルローラーと冷却装置より後部のテーブ
ルローラーにブロツク分けして、それぞれ別個の
駆動源に連結することにより、冷却装置を抜け出
た条材のみを高速で搬送し、冷却装置内の条材は
一定速度で搬送できる。又更にテーブルローラー
を１本毎に夫々駆動源と連結する方式として個々
に速度制御できる設備としても、前記と同様の条
材搬送は可能である。 Here, shearing during running refers to shearing the strip while it is running, and inside the strip cooling device is a cooling trough that is cylindrical in shape. The method is to cool the strip by passing it through the cylinder and letting water flow into the cylinder. In the above-mentioned process, the tip end of the next strip is often already in the cooling device until it is sheared, but the speed of the strip at this time is limited by the speed of the hot rolling mill 2. The speed is not the same as that of the table roller 7, and slipping occurs between the strip and the table roller. In addition, when the certain time To is smaller than zero, that is, when the length of the cooling device 4 is sufficiently larger than the length of the strip after shearing, the shearing of the next strip occurs before the rear end of the preceding strip passes through the cooling device. will be completed, and To will not be taken. In such a case,
By dividing the table roller 7 into blocks, that is, the table roller within the length of the cooling device and the table roller at the rear of the cooling device, and connecting each block to a separate drive source, only the strips that have passed through the cooling device can be moved at high speed. The strips inside the cooling device can be transported at a constant speed. Furthermore, the same strip conveyance as described above is also possible using a system in which each table roller is connected to a drive source so that the speed can be controlled individually.
（発明の効果）
第７図、第８図に本発明の効果を示す。第７図
ａ，ｂは条材先端の表面、中心の硬度を表わした
もので、第７図ａが従来法、第７図ｂが本発明法
である。第７図ｃ，ｄは条材後端の表面、中心の
硬度を表わしたもので、第７図ｃが従来法、第７
図ｄが本発明法である。(Effects of the invention) Figures 7 and 8 show the effects of the invention. Figures 7a and 7b show the hardness of the surface and center of the tip of the strip, where Figure 7a is the conventional method and Figure 7b is the method of the present invention. Figures 7c and d show the hardness of the surface and center of the rear end of the strip; Figure 7c is the conventional method;
Figure d shows the method of the present invention.
これらから従来法では条材内の後端部硬度が、
先端部硬度に比べ低くなつており、これは後端部
は速度が上昇して硬度分布が一様でなかつた。こ
れが本発明法では先端部、後端部とも同じあり、
冷却の均一性が確保できる。尚冷却はかなりの強
冷却であり、熱間圧延後の棒鋼は直接焼入れが入
つた状態で表面が中心に比べ高い硬度を示す。 From these, in the conventional method, the hardness of the rear end of the strip is
The hardness was lower than that at the tip, because the speed at the rear end increased and the hardness distribution was not uniform. In the method of the present invention, this is the same for both the tip and rear ends.
Uniform cooling can be ensured. Note that the cooling is quite intense, and the steel bar after hot rolling shows higher hardness at the surface than at the center when directly quenched.
このように本発明によれば第８図に示すように
条材内長手方向の硬度はほぼ一様であり、棒鋼な
どを生産するラインで走間剪断機を備え、その直
後に冷却装置を配置して強制冷却する際、条材長
手方向に均一な品質を得る有効な方法である。 According to the present invention, as shown in Fig. 8, the hardness in the longitudinal direction within the strip is almost uniform, and a line for producing steel bars etc. is equipped with a running shearer, and a cooling device is placed immediately after it. This is an effective method to obtain uniform quality in the longitudinal direction of the strip when forced cooling.
第１図ａ，ｂ，ｃは本発明方法の構成の説明
図、第２図は本発明における条材の速度変化の説
明図、第３図は熱間条材圧延ラインの一例図、第
４図ａ，ｂ，ｃは従来法における問題点の説明
図、第５図は従来法の条材速度の説明図、第６図
ａ，ｂは従来の問題解決法の例を示す図、第７図
ａ，ｂ，ｃ，ｄ、第８図は本発明の効果の説明図
である。
１……加熱炉、２……熱間圧延機、３……走間
剪断機、４……冷却装置、５……冷却床、６……
冷間切断機、７……テーブルローラー、８……冷
却装置セクシヨン、９……条材検出器、１０……
テーブル速度制御装置。
Figures 1a, b, and c are explanatory diagrams of the configuration of the method of the present invention, Figure 2 is an explanatory diagram of the speed change of the strip in the present invention, Figure 3 is an example of a hot strip rolling line, and Figure 4 is an illustration of the configuration of the method of the present invention. Figures a, b, and c are explanatory diagrams of problems in the conventional method. Figure 5 is an explanatory diagram of the strip speed in the conventional method. Figures 6 a and b are diagrams showing an example of the conventional problem-solving method. Figure 7 Figures a, b, c, d and Fig. 8 are explanatory diagrams of the effects of the present invention. 1... Heating furnace, 2... Hot rolling mill, 3... Running shear, 4... Cooling device, 5... Cooling bed, 6...
Cold cutting machine, 7...Table roller, 8...Cooling device section, 9...Strip material detector, 10...
Table speed control device.
Claims (1)
長手方向に搬送しながら冷却する方法において、
剪断後の条材が冷却装置内にある時は一定速度で
搬送し、条材後端が冷却装置を抜け出た後は、冷
却床へ剪断後の条材を一本づつ衝突しないように
取込むために速度を上昇させて搬送することを特
徴とする熱間圧延条材の均一冷却方法。1. A method in which a strip rolled by a hot rolling mill is sheared and then cooled while being conveyed in the longitudinal direction of the strip,
When the sheared strips are in the cooling device, they are transported at a constant speed, and after the rear end of the strips leaves the cooling device, the sheared strips are taken into the cooling bed one by one to avoid collisions. A method for uniformly cooling hot-rolled strips, which is characterized by conveying the hot-rolled strips at an increased speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24215284A JPS61123410A (en) | 1984-11-16 | 1984-11-16 | Uniform cooling method of hot rolled bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24215284A JPS61123410A (en) | 1984-11-16 | 1984-11-16 | Uniform cooling method of hot rolled bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61123410A JPS61123410A (en) | 1986-06-11 |
| JPS64126B2 true JPS64126B2 (en) | 1989-01-05 |
Family
ID=17085096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24215284A Granted JPS61123410A (en) | 1984-11-16 | 1984-11-16 | Uniform cooling method of hot rolled bar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61123410A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107497867A (en) * | 2017-09-21 | 2017-12-22 | 江苏省沙钢钢铁研究院有限公司 | A Stelmer Cooling Method for Improving the Uniformity of Tool Steel 6150 Wire Rod |
-
1984
- 1984-11-16 JP JP24215284A patent/JPS61123410A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61123410A (en) | 1986-06-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |