JPH0310712A - Cutting method for hot rolled steel - Google Patents
Cutting method for hot rolled steelInfo
- Publication number
- JPH0310712A JPH0310712A JP14116289A JP14116289A JPH0310712A JP H0310712 A JPH0310712 A JP H0310712A JP 14116289 A JP14116289 A JP 14116289A JP 14116289 A JP14116289 A JP 14116289A JP H0310712 A JPH0310712 A JP H0310712A
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- hot
- cutting machine
- rolled steel
- cut
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 19
- 238000005096 rolling process Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims description 21
- 238000004513 sizing Methods 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 description 9
- 238000012545 processing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
この発明は熱間圧延鋼材の切断方法、特にそのトップク
ロップの切断に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a method for cutting hot rolled steel, particularly to cutting the top crop thereof.
［従来の技術］
第２図は熱間切断機の配列を示した説明図であり、熱間
切断機を２基有し、かつトップクロップを仕上圧延機の
直後の切断機で切断する一般的な例が図示されている。[Prior Art] Fig. 2 is an explanatory diagram showing the arrangement of hot cutting machines, and shows a general method that has two hot cutting machines and cuts the top crop with the cutting machine immediately after the finishing mill. An example is illustrated.
図において、（１）は仕上圧延機、（２）は仕上圧延機
（１４）の下流側に設けられた第１の切断機であり、（
３）は第１の切断機（２）に付属する第１の定寸機であ
る。（４）は第１の切断機（２）の更に下流側に設けら
れた第２の切断機、（５）は第２の切断機（４）に付属
する第２の定寸機であり、（８）は冷却床である。In the figure, (1) is a finishing mill, (2) is a first cutting machine installed downstream of the finishing mill (14), and (
3) is a first sizing machine attached to the first cutting machine (2). (4) is a second cutting machine provided further downstream of the first cutting machine (2), (5) is a second sizing machine attached to the second cutting machine (4), (8) is a cooling bed.
第３図は切断の対象となる熱間圧延鋼材の説明図である
。図において、（１０）は熱間圧延鋼材であり、（１０
ａ）はトップクロップ、（１０ｂ）は後端非定常部（以
下ボトムクロップと称する）である。１〜■は製品部分
である。FIG. 3 is an explanatory diagram of a hot rolled steel material to be cut. In the figure, (10) is a hot rolled steel material, (10
a) is the top crop, and (10b) is the rear end unsteady portion (hereinafter referred to as bottom crop). 1 to ■ are product parts.
ここで、第２図の熱間切断機の配列のもとて第３図の熱
間圧延材（１０）を切断する方法を説明する。Here, a method of cutting the hot rolled material (10) shown in FIG. 3 using the hot cutting machine arrangement shown in FIG. 2 will be explained.
まず、仕上圧延機（１）にて圧延された熱間圧延鋼材（
１０）は、第１の切断機（２）によりトップクロップ（
１０ａ）を切り落とすため、第１の切断機（２）の手前
で減速され、そのトップクロップ（１０ａ）が切断され
る。そして、更に熱間圧延鋼材（１０）を送り出して第
２の切断機（４）で切断し、図示のように第１の切断機
（２）と第２の切断機（４）とにより順次切断していき
、製品（１）〜（ＩＶ）を得ていた。First, hot rolled steel material (
10) is top cropped (
10a), it is decelerated before the first cutting machine (2) and its top crop (10a) is cut off. Then, the hot rolled steel material (10) is sent out and cut by the second cutting machine (4), and then sequentially cut by the first cutting machine (2) and the second cutting machine (4) as shown in the figure. As a result, products (1) to (IV) were obtained.
ところが、この切断方法は、圧延後、第１の切断機（２
）の手前で減速して、第１の切断機（２）によりトップ
クロップ（１０ａ）を切り落とすため、圧延伸び長さを
仕上圧延機（１）と第１の切断機（２）との距離よりｌ
Ｏ〜２０ｍ程度短かく抑えられるため、圧延能率・圧延
歩留が低く抑えられ、合理的とは言えなかった。However, in this cutting method, after rolling, the first cutting machine (2
), and the top crop (10a) is cut off by the first cutting machine (2), so the rolling elongation length is determined from the distance between the finishing mill (1) and the first cutting machine (2). l
Since the length was kept short by about 20 m, rolling efficiency and rolling yield were kept low, which could not be said to be rational.
そこで、製品歩留りの向上などを目的として、仕上圧延
機（１）により熱間圧延鋼材（１０）を第１の切断機（
２）を越えて圧延し、次の第１の切断方法〜第３の切断
方法のいずれかの切断方法によって切断していた。Therefore, for the purpose of improving product yield, etc., the hot rolled steel material (10) is cut into the first cutting machine (1) by the finishing mill (1).
2), and then cut by any one of the following first to third cutting methods.
第４図（Ａ）（Ｂ）は第１の切断方法を示した説明図で
ある。同図（Ａ）に示すように、仕上圧延機（１）で第
１の切断機（２）を越えて伸ばした後、同図（Ｂ）に示
すように、仕上圧延機（１）を開き、熱間圧延鋼材（ｌ
Ｏ）のトップクロップ（ｆｏａ）の切断部分を、第１の
切断機（２）に合わせるまで熱間圧延鋼材（１０）を後
退させた後、切断する。FIGS. 4A and 4B are explanatory diagrams showing the first cutting method. As shown in Figure (A), the finishing mill (1) is used to stretch the material past the first cutting machine (2), and then the finishing mill (1) is opened as shown in Figure (B). , hot rolled steel (l
The top crop (foa) of O) is cut after retracting the hot rolled steel (10) until it fits into the first cutter (2).
第５図（Ａ）（Ｂ）は第２の切断方法を示した説明図で
ある。同図（Ａ）に示すように、第１の切断機（２）で
トップクロック（ｌｏａ）付きの製品（Ｉ）の切断部分
を、第１の定寸機（３）により定寸して第１の切断機（
２）で切断する。次に、同図（Ｂ）に示すように、製品
（１）の後端面を、後端面用の定寸機（５）に当てて定
寸し、第２の切断機（４）により切断する。FIGS. 5A and 5B are explanatory views showing the second cutting method. As shown in Figure (A), the cut portion of the product (I) with the top clock (LOA) is sized by the first cutting machine (2), and the cut part is sized by the first sizing machine (3). 1 cutting machine (
Cut in step 2). Next, as shown in Figure (B), the rear end surface of the product (1) is sized by applying it to a sizing machine (5) for the rear end surface, and then cut by a second cutting machine (4). .
第３の方法は、第２図の第２の切断機（４）のみで熱間
圧延鋼材（１０）を切断する。In the third method, the hot rolled steel material (10) is cut using only the second cutting machine (4) shown in FIG.
［発明が解決しようとする課題］
第４図に示した第１の切断方法は、熱間圧延鋼材（１０
）を後退させた後第１の切断機（２）で切断するため、
仕上圧延機（１）の圧延ロールやガイド類を開くといっ
た操作が必要であり、また、現実的な設備においては衝
突の可能性が大きく、圧延材の後退のため、圧延能率低
下の要因にもなりやすいという問題点がある。[Problem to be solved by the invention] The first cutting method shown in FIG.
) is retracted and then cut by the first cutting machine (2),
Operations such as opening the rolling rolls and guides of the finishing rolling mill (1) are required, and in practical equipment, there is a high possibility of collision, and the rolling material retreats, causing a reduction in rolling efficiency. The problem is that it can easily occur.
第５図に示した第２の切断方法は、第１の切断機（２）
でトップクロップ（１０ａ）付きの製品（１）を切断し
、製品（１）の後端面を後端面用の定寸機（３）に当て
て第２の切断機（４）により切断するため、現実的には
、第１の切断機（２）と第２の切断機（４）との距離の
制約から、第２の切断機（４）の後端面用の定寸機が第
１の定寸機（３）と共用であったりするため、第２の切
断機（４）の切断中に欠切を切断しようとする第１の切
断機（２）に待ち時間が生じ、圧延能率の向上を妨げる
という問題点がある。The second cutting method shown in FIG.
In order to cut the product (1) with the top crop (10a), apply the rear end surface of the product (1) to the sizing machine (3) for the rear end surface, and cut it with the second cutting machine (4). In reality, due to the distance constraints between the first cutting machine (2) and the second cutting machine (4), the sizing machine for the rear end face of the second cutting machine (4) is used as the first sizing machine. Since it is shared with the cutting machine (3), there is a waiting time for the first cutting machine (2) to cut the notch while the second cutting machine (4) is cutting, which improves rolling efficiency. There is a problem in that it prevents
また、第３の切断方法は、第２の切断機（４）のみで切
断するため、実質的に第１の切断機（２）が無効となり
、圧延能率が大巾に低下するという問題点がある。In addition, in the third cutting method, since cutting is performed only by the second cutting machine (4), the first cutting machine (2) is effectively disabled, and there is a problem that the rolling efficiency is greatly reduced. be.
この発明は、上記のような問題点を解決するためになさ
れたもので、圧延能率を低下させることなく熱間圧延鋼
材を切断することを可能にした熱間圧延鋼材の切断方法
を提供することを目的とする。This invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a method for cutting hot-rolled steel materials that makes it possible to cut hot-rolled steel materials without reducing rolling efficiency. With the goal.
［課題を解決するための手段］
この発明に係る熱間圧延鋼材の切断方法は、熱間圧延鋼
材を圧延後に直ちに製品の熱間長さに切り分ける熱間圧
延鋼材の切断方法において、次の第１の工程及び第２の
工程を有する。[Means for Solving the Problems] A method for cutting hot rolled steel according to the present invention includes the following method for cutting hot rolled steel into the hot length of a product immediately after rolling. It has a first step and a second step.
（１）第１の工程；
まず、熱間圧延鋼材のトップクロップと最初に切り分け
るべき製品の熱間長さとを合わせた熱間長さを、定寸し
て切断する。(1) First step: First, the hot length, which is the sum of the top crop of the hot-rolled steel material and the hot length of the product to be cut first, is determined and cut.
（２）第２の工程；
第１の工程の後、前記トップクロップ付の熱間製品のト
ップクロップの熱間長さを定寸して、トップクロップを
切り落とす。(2) Second step: After the first step, the hot length of the top crop of the hot product with the top crop is determined and the top crop is cut off.
［作 用］
この発明においては、第１の工程でトップクロップ付の
熱間製品が切断され、更に第２の工程でトップクロップ
の切り落としが行われる。[Function] In the present invention, the hot product with the top crop is cut in the first step, and the top crop is further cut off in the second step.
［実施例］
第１図（Ａ）（Ｂ）はこの発明の一実施例に係る熱間圧
延鋼材の切断方法の説明図である。なお、熱間切断機の
配列は第２図に示した構成と同様であるが、第２の切断
機（４）は第２の定寸機（５）の他にクロップ処理設備
を有するものとする。[Example] FIGS. 1A and 1B are explanatory diagrams of a method for cutting hot rolled steel according to an example of the present invention. The arrangement of the hot cutting machines is the same as the configuration shown in Figure 2, but the second cutting machine (4) has crop processing equipment in addition to the second sizing machine (5). do.
第１図（Ａ）に示すように、熱間圧延鋼材（ｌＯ）の圧
延伸び長さが第１の切断機（２）を越えて伸びてくると
、熱間圧延鋼材（１０）の先端を、トップクロップ（Ｉ
Ｄａ）と製品（１）の長さとの合計の熱間長さに定寸さ
れた第１の定寸機（３）に当て、第１の切断機（２）に
より切断する。そして、その切片即ちトップクロップ（
１０ａ）付きの製品（１）を第２の切断機（４）に送る
。As shown in Fig. 1 (A), when the rolling elongation length of the hot rolled steel material (lO) extends beyond the first cutting machine (2), the tip of the hot rolled steel material (10) is cut off. , top crop (I
The product is applied to the first sizing machine (3), which is sized to the sum of the hot length of the product (1) and the length of the product (1), and cut by the first cutting machine (2). Then, the section, that is, the top crop (
The product (1) with 10a) is sent to the second cutting machine (4).
次に、第１図（Ｂ）に示すように、トップクロップ（１
０ａ）の先端を第２の定寸機（５）に当てる。Next, as shown in FIG. 1(B), top crop (1
Place the tip of 0a) on the second sizing machine (5).
このとき、トップクロップ（１０ａ）の後側の製品（１
）の切断部分が第２の切断機（４）に位置するように、
トップクロップ（１０ａ）の長さ・温度を管理して、そ
の正しい位置に設定し、その切断部分を第２の切断機（
４）により切断し、トップクロップ（ＬＯａ）を切り落
とす。At this time, the product (1
) so that the cut part is located on the second cutting machine (4),
Control the length and temperature of the top crop (10a), set it at the correct position, and then cut the cut part into the second cutting machine (
4) and cut off the top crop (LOa).
なお、上記の実施例においては、第１の切断機（２）に
より製品（１）の切断部分を切断した例を示したが、当
初切断する部分は製品（Ｉ）以降のいずれの切断部であ
ってもよい。即ち、製品長さをＬとすると、トップクロ
ップの長さ＋ＬＸＮ（Ｎは１以上の整数）の長さに切断
する。In addition, in the above example, an example was shown in which the first cutting machine (2) cut the cut part of the product (1), but the part to be initially cut can be any cutting part after the product (I). There may be. That is, if the product length is L, it is cut to the length of the top crop + LXN (N is an integer of 1 or more).
また、トップクロップ（ｌｏａ）の切り落としは、例え
ば第２の切断機（４）のライン上に更に第３の切断機、
第４の切断機がある場合であって、クロップ処理設備が
ある場合には、これらの切断機によって行ってもよいこ
とはいうまでもない。Also, for cutting off the top crop (loa), for example, a third cutting machine is installed on the line of the second cutting machine (4),
It goes without saying that if there is a fourth cutting machine and crop processing equipment, these cutting machines may be used.
［発明の効果］
以上のようにこの発明によれば、熱間圧延鋼材をトップ
クロップ付で切断し、次にトップクロップを切り落とす
ようにしたので、従来のように熱間圧延材の後退させる
必要がなく、また第１の切断機に待ち時間を生ぜず、更
に熱間切断機の稼動率を下げることもなく、熱間圧延鋼
材の圧延伸び長の拡大による製品歩留りの向上が図られ
、更に、熱間切断機の配列が圧延機から短かくなり、熱
間切断能率の向上により圧延能率を向上させ、かつ圧延
歩留りを向上させることができた。[Effects of the Invention] As described above, according to the present invention, a hot rolled steel material is cut with a top crop, and then the top crop is cut off, so there is no need to retreat the hot rolled steel material as in the conventional method. In addition, there is no waiting time in the first cutting machine, and there is no reduction in the operating rate of the hot cutting machine, and the product yield is improved by increasing the rolling elongation length of the hot rolled steel material. , the arrangement of the hot cutting machine was shortened from the rolling mill, and the hot cutting efficiency was improved, thereby improving the rolling efficiency and the rolling yield.
第１図はこの発明の一実施例に係る熱間圧延鋼材の切断
方法の説明図、第２図は熱間切断機の一般的な配列例を
示す説明図、第３図は切断対象となる熱間圧延鋼材の説
明図、第４図及び第５図は従来の熱間切断機の切断方法
の説明図である。
図において、（２）は第１の切断機、（４）は第２の切
断機、（１０）は熱間圧延鋼材である。
第３図
第４図Fig. 1 is an explanatory diagram of a method for cutting hot rolled steel materials according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing an example of a general arrangement of hot cutting machines, and Fig. 3 is an explanatory diagram showing an example of a general arrangement of hot cutting machines. FIGS. 4 and 5 are explanatory diagrams of hot rolled steel materials, and are explanatory diagrams of a cutting method using a conventional hot cutting machine. In the figure, (2) is a first cutting machine, (4) is a second cutting machine, and (10) is a hot rolled steel material. Figure 3 Figure 4
Claims (1)
尺長さ又はそれらを組み合わせた熱間長さ（以下製品の
熱間長さと称する）に切り分ける熱間圧延鋼材の切断方
法において、 まず、熱間圧延鋼材の先端非定常部（以下トップクロッ
プと称する）と最初に切り分けるべき製品の熱間長さと
を合わせた熱間長さを、定寸して切断する第１の工程と
、 該第１の工程の後、前記トップクロップ付の熱間製品の
トップクロップの熱間長さを定寸して、トップクロップ
を切り落とす第２の工程と を有する、ことを特徴とする熱間圧延鋼材の切断方法。[Claims] A hot-rolled steel product that is immediately cut into ordered lengths, multiple lengths thereof, or a hot length that is a combination thereof (hereinafter referred to as the hot length of the product) after rolling the hot-rolled steel products. In the cutting method, first, a first step is performed in which the hot length, which is the sum of the tip unsteady part (hereinafter referred to as top crop) of the hot rolled steel material and the hot length of the product to be cut first, is cut to a fixed size. and, after the first step, a second step of determining the hot length of the top crop of the hot product with the top crop and cutting off the top crop. A method for cutting hot rolled steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14116289A JPH0310712A (en) | 1989-06-05 | 1989-06-05 | Cutting method for hot rolled steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14116289A JPH0310712A (en) | 1989-06-05 | 1989-06-05 | Cutting method for hot rolled steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0310712A true JPH0310712A (en) | 1991-01-18 |
Family
ID=15285577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14116289A Pending JPH0310712A (en) | 1989-06-05 | 1989-06-05 | Cutting method for hot rolled steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0310712A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811143A (en) * | 2010-04-23 | 2010-08-25 | 攀钢集团钢铁钒钛股份有限公司 | Temperature control method for heat-preservation casting blank to be rolled |
-
1989
- 1989-06-05 JP JP14116289A patent/JPH0310712A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811143A (en) * | 2010-04-23 | 2010-08-25 | 攀钢集团钢铁钒钛股份有限公司 | Temperature control method for heat-preservation casting blank to be rolled |
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