JPS5868407A - Improving method of biting property in cold tandem mill - Google Patents
Improving method of biting property in cold tandem millInfo
- Publication number
- JPS5868407A JPS5868407A JP16699981A JP16699981A JPS5868407A JP S5868407 A JPS5868407 A JP S5868407A JP 16699981 A JP16699981 A JP 16699981A JP 16699981 A JP16699981 A JP 16699981A JP S5868407 A JPS5868407 A JP S5868407A
- Authority
- JP
- Japan
- Prior art keywords
- rolls
- cold tandem
- tandem mill
- roll
- range
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/005—Rolls with a roughened or textured surface; Methods for making same
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/28—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/10—Roughness of roll surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/26—Hardness of the roll surface
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、冷間タンデム・ミルにおけるかみ込み性向上
方法に関するものでるる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for improving bitability in a cold tandem mill.
冷間タンデム・ミルにおいて、第１スタンドへのストリ
ップのかみ込み性はミルの能率を大きく左右する。この
かみ込み性を向上させるために、第１スタン下のワーク
・ロール表面を粗く研摩している。第１スタンドのワー
ク・ロールは、成品の表面品質に及ぼす影響が少ないの
で、通常他のスタンドより粗く研摩している。しかし、
あまり粗すき゛ると研摩口がスｌ−ＩＪツブに転写され
、品質不良となる。一方、細かすぎるとかみ込み性が悪
化し、ミルの能率を著しく低下させる。In a cold tandem mill, the ability of the strip to be inserted into the first stand greatly influences the efficiency of the mill. In order to improve this biting property, the surface of the work roll under the first stun is roughly polished. The work rolls of the first stand are usually more coarsely ground than those of the other stands, since this has less effect on the surface quality of the finished product. but,
If it is too rough, the polishing hole will be transferred to the sl-IJ tab, resulting in poor quality. On the other hand, if it is too fine, the biting property will deteriorate and the efficiency of the mill will be significantly reduced.
したがって、本発明の目的は、ストリップのかみ込み性
を向上させ、しかも品質の低下防止を図ることにある。Therefore, an object of the present invention is to improve the biting property of the strip and to prevent deterioration in quality.
本発明の方法は、冷間タンデム・ミルの第１スタンドに
おいて、ワーク・ロールの表面硬度に応じて該ロールの
表面粗度を予め設定した範囲に調節することを特徴とし
ている。The method of the present invention is characterized in that, in the first stand of a cold tandem mill, the surface roughness of the work roll is adjusted to a preset range depending on the surface hardness of the work roll.
一般に、ワーク・ロールの表面が同一の仕上粗さでは、
ロールの径が小さく、硬度が低いほどストリップの品質
低下が大きくなる。ワーク・ロールは使用するに従って
ロール径が小さくなり、それにともなってロール表面の
硬化層も薄くなり、結果的にはロールの表面硬度も低下
する。同じ砥石でロールを研磨した場合、ロール表面の
硬度が高いときにはロール表面の研磨目は微細となるが
、硬度が低下してくると研磨目は粗くなり、結局成品に
研磨目が転写されることになる。Generally, if the surface of the work roll has the same finish roughness,
The smaller the roll diameter and the lower the hardness, the greater the quality deterioration of the strip. As the work roll is used, the roll diameter becomes smaller, and the hardened layer on the roll surface becomes thinner, resulting in a decrease in the surface hardness of the roll. When polishing rolls with the same whetstone, when the roll surface hardness is high, the polishing marks on the roll surface will be fine, but as the hardness decreases, the polishing marks will become coarser, and eventually the polishing marks will be transferred to the finished product. become.
そこで、本発明の方法では、いままでの圧延実績および
経験にもとづいてロール硬度の変化に応じて異なる粗さ
の砥石ヲ府いてワーク・ロールを研磨する。このロール
表面硬度とロール表面粗度との関係を第１図に示す。Therefore, in the method of the present invention, a work roll is polished using grindstones with different roughnesses depending on changes in roll hardness based on past rolling results and experience. The relationship between the roll surface hardness and roll surface roughness is shown in FIG.
ロール表面硬度ＣＨｓ°）が、０〜８５．８５〜９０．
９０〜９５．９５以上の範囲にあるとき、ロール表面粗
度（μＲα）をそれぞれ０．６〜０．９．０．７〜１．
２．０．８〜１．６．１．０〜２．０の範囲内にあるよ
うに研磨する。なお、参考までに、ロール表面硬度（Ｈ
ｓ’）が、０〜８５．８５〜９０．９０〜９５．９５以
上の範囲にあるとき、ロールの直径（ｍｍ）はそれぞれ
５００以下、５００〜５３０゜５３０〜５６０，５６０
以上の範囲内にある。Roll surface hardness CHs°) is 0 to 85.85 to 90.
When the roll surface roughness (μRα) is in the range of 90 to 95.95 or more, the roll surface roughness (μRα) is 0.6 to 0.9, 0.7 to 1.
2. Polish to within the range of 0.8 to 1.6. 1.0 to 2.0. For reference, the roll surface hardness (H
s') is in the range of 0 to 85.85 to 90.90 to 95.95 or more, the roll diameter (mm) is 500 or less, 500 to 530°, 530 to 560,560, respectively.
Within the above range.
このようにして研磨したロールは、第２図に示すように
、冷間タンデム・ミル１の第１スタンドのワーク・白−
ル２に取り付ける。As shown in Fig. 2, the roll polished in this way is used as a workpiece on the first stand of cold tandem mill 1.
Attach it to Le 2.
次に、本発明の方法の実施例を第１表に示す。Next, Table 1 shows examples of the method of the present invention.
第１表
以上の説明から明らかなように、本発明の方法によれば
、成品の品質を落さずにストリップのかみ込み性を向上
させることができる。As is clear from the explanations in Table 1 and above, according to the method of the present invention, the bitability of the strip can be improved without degrading the quality of the finished product.
第１図は本発明の方法が適用しえるロール表面硬度とロ
ール表面粗度との関係を示すグラフ。第２図は通常の冷
間タンデム・ミルに本発明の方法を適用する原理を示す
説明図。
１：冷間タンデム・ミル
２：ワーク・ロール
特許出願人 住友金属工業株式会社
３８FIG. 1 is a graph showing the relationship between roll surface hardness and roll surface roughness to which the method of the present invention can be applied. FIG. 2 is an explanatory diagram showing the principle of applying the method of the present invention to a normal cold tandem mill. 1: Cold tandem mill 2: Work roll Patent applicant Sumitomo Metal Industries, Ltd. 38
Claims (1)
ロールの表面硬度に応じて該ロールの表面粗度を予め設
定した範囲に調節することを％鑓とした冷間タンデム・
ミルにおけるかみ込み性向上方法。In the first stand of a cold tandem mill, the workpiece
A cold tandem method that adjusts the surface roughness of the roll to a preset range according to the surface hardness of the roll.
Method for improving biting properties in mills.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16699981A JPS5868407A (en) | 1981-10-19 | 1981-10-19 | Improving method of biting property in cold tandem mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16699981A JPS5868407A (en) | 1981-10-19 | 1981-10-19 | Improving method of biting property in cold tandem mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5868407A true JPS5868407A (en) | 1983-04-23 |
Family
ID=15841496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16699981A Pending JPS5868407A (en) | 1981-10-19 | 1981-10-19 | Improving method of biting property in cold tandem mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5868407A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0679328A (en) * | 1992-09-01 | 1994-03-22 | Kawasaki Steel Corp | High speed passing roll |
-
1981
- 1981-10-19 JP JP16699981A patent/JPS5868407A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0679328A (en) * | 1992-09-01 | 1994-03-22 | Kawasaki Steel Corp | High speed passing roll |
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