JP6074907B2 - Method for winding thin steel sheet and method for manufacturing steel strip coil - Google Patents

Method for winding thin steel sheet and method for manufacturing steel strip coil Download PDF

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JP6074907B2
JP6074907B2 JP2012095657A JP2012095657A JP6074907B2 JP 6074907 B2 JP6074907 B2 JP 6074907B2 JP 2012095657 A JP2012095657 A JP 2012095657A JP 2012095657 A JP2012095657 A JP 2012095657A JP 6074907 B2 JP6074907 B2 JP 6074907B2
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thin steel
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coil
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陽介 原井
陽介 原井
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JFE Steel Corp
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この発明は、引張強度440MPa以下の薄鋼板についてリール巻き取り後に発生するキンク現象を防止できる薄鋼板の巻き取り方法および表面形状の優れた鋼帯コイルを製造する方法に関する。   The present invention relates to a method for winding a thin steel plate and a method for producing a steel strip coil having an excellent surface shape that can prevent a kink phenomenon that occurs after reel winding on a thin steel plate having a tensile strength of 440 MPa or less.

板厚が0.6mm以下のような薄鋼板をライン出側のリールに巻き取った場合に、巻き取り後のコイルに図1に示すようなキンク現象が発生する。このキンク現象は、コイルの最も内側の1巻きないし数巻き部分が内側に撓んで、円形の1巻きないし数巻き部分の周方向の一部が内側に座屈変形する現象である。   When a thin steel plate having a thickness of 0.6 mm or less is wound around a reel on the line exit side, a kink phenomenon as shown in FIG. 1 occurs in the coil after winding. This kink phenomenon is a phenomenon in which the innermost winding or several winding portions of the coil are bent inward, and a part of the circular one winding or several winding portions in the circumferential direction is buckled inward.

このようなキンク現象を防止する手段として、従来においては、一般的にコイル内径にスリーブを装入する方法や、コイル先端部に板厚を他より大にしたオフゲージ部を50m程度つける方法がある。また、特許文献1においては、最終スタンドを経て0.3mm以下の板厚に圧延されたストリップを最終スタンドとテンションリールとの間に設置した張力制御装置により最終スタンド出側張力を5〜16kg/mmの範囲内にし、巻取張力を4〜7kg/mmの範囲内とするとともに巻取張力は最終スタンド出側張力より小さい範囲に制御することが記載されている。また、特許文献2には、板厚0.25〜0.5mmの冷延鋼板を巻き取る際に張力を3段階に分ける方法が記載されている。 As a means for preventing such a kink phenomenon, conventionally, there are a method of generally inserting a sleeve into the inner diameter of a coil and a method of attaching an off-gauge portion having a plate thickness larger than the others to the coil tip portion by about 50 m. . Moreover, in patent document 1, the final stand exit side tension | tensile_strength is set to 5-16kg / by the tension control apparatus which installed the strip rolled to the board thickness of 0.3 mm or less through the last stand between the last stand and the tension reel. It is in the range of mm 2, winding tension as well as in the range of winding tension of 4~7kg / mm 2 have been described to control the smaller ranges final stand outlet side tension. Patent Document 2 describes a method of dividing tension into three stages when a cold-rolled steel sheet having a thickness of 0.25 to 0.5 mm is wound.

また、特許文献3には、冷延ブライト鋼板をリールに巻き取りながら防錆油を塗布する際に、防錆油の噴霧量をリール電流値に反比例させて防錆油の塗布を行なう方法が記載されており、さらに特許文献4においては、ブライト鋼板に防錆油を塗布しながらリールに巻き取るに際して、表面粗度がRa=0.2μm以下で、かつRmax=2.5μm以下であるブライト鋼板に、粘度が8.0(40℃cst)以上の防錆油を50〜150mg/mの範囲で付着させる方法が記載されている。 Patent Document 3 discloses a method of applying rust-preventing oil by applying a rust-preventing oil spray amount in inverse proportion to the reel current value when applying rust-preventing oil while winding a cold rolled bright steel sheet around a reel. Further, in Patent Document 4, when winding on a reel while applying rust-preventing oil to a bright steel plate, the surface roughness is Ra = 0.2 μm or less and Rmax = 2.5 μm or less. A method is described in which a rust preventive oil having a viscosity of 8.0 (40 ° C. cst) or more is adhered to a steel plate in a range of 50 to 150 mg / m 2 .

特公昭64−028647号公報Japanese Examined Patent Publication No. 64--02647 特開平06−047435号公報Japanese Patent Laid-Open No. 06-047435 特開昭61−226120号公報JP 61-226120 A 特開平08−092770号公報Japanese Patent Laid-Open No. 08-092770

しかしながら、前記のコイル内径にスリーブを装入する方法においては、設備費が高価であると共に、スリーブの回収、スリーブの運搬等の、スリーブを取り扱うためのコストが嵩むという不具合がある。また、前記のオフゲージ部を付ける方法では、このオフゲージ部は商品ではないので歩留りが大幅に低下するとともに鋼板の製造効率がよくないという不具合がある。   However, the above-described method for inserting the sleeve into the inner diameter of the coil has the disadvantage that the equipment cost is high and the cost for handling the sleeve, such as collecting the sleeve and transporting the sleeve, increases. Further, the method of attaching the off-gauge part has the disadvantage that the yield is greatly reduced and the manufacturing efficiency of the steel sheet is not good because the off-gauge part is not a product.

また、特許文献1に記載のものでは、薄鋼板の破断その他の不利を解消できるにしても、コイル巻き取りの全工程が一様の張力条件で巻き取られるものであるから、得られたコイルにおいてキンク現象の発生を必ずしも有効に防止することができないという不具合がある。
また、特許文献2に記載のものでは、板厚0.5mm以下の冷延鋼板において有効にキンク現象を防止できるとしているが、軟質材の場合においては好ましい結果を得ることが困難である。特に、巻き取り内径が20インチ以下と小さい場合及び防錆油塗布量(以下において塗油量という場合もある)が多い場合では、巻き取り張力を制御した場合でもキンク現象の発生を抑えることができないという不具合がある。
Moreover, in the thing of patent document 1, even if it can eliminate the fracture | rupture and other disadvantages of a thin steel plate, since the whole coil winding process is wound by uniform tension conditions, the obtained coil However, it is not always possible to effectively prevent the occurrence of the kink phenomenon.
Moreover, in the thing of patent document 2, although it says that the kink phenomenon can be effectively prevented in the cold-rolled steel plate with a plate thickness of 0.5 mm or less, it is difficult to obtain a preferable result in the case of a soft material. In particular, when the winding inner diameter is as small as 20 inches or less and when the amount of rust-preventive oil applied (hereinafter sometimes referred to as oil amount) is large, the occurrence of the kink phenomenon can be suppressed even when the winding tension is controlled. There is a bug that you can not.

また、特許文献3、4に記載のものはブライト鋼板についての処理方法であって、ダル鋼板については必ずしも有効な効果を発揮できないという不具合があり、また、これらは鋼板の強度レベルと巻き取り内径によって最適条件が変化するため、キンク現象を効果的に解消することができないという不具合もある。
そこで、この発明は、一般的に軟質材ないし一般材と呼ばれる引張強度440MPa以下の薄鋼板を、例えば塗油量が多い状態で内径20インチに巻き取るという、キンク現象が発生し易い条件下でも、キンク現象を発生させることなく巻き取る方法を提供することを目的としている。
Moreover, the thing of patent document 3, 4 is a processing method about a bright steel plate, Comprising: There exists a malfunction that it cannot necessarily exhibit an effective effect about a dull steel plate, Moreover, these are the strength level and winding inner diameter of a steel plate. Since the optimum condition varies depending on the kink phenomenon, the kink phenomenon cannot be effectively eliminated.
In view of this, the present invention provides a thin steel plate generally called a soft material or a general material with a tensile strength of 440 MPa or less, for example, even under conditions where a kink phenomenon is likely to occur, such as winding up to a 20-inch inner diameter with a large amount of oil applied. An object of the present invention is to provide a winding method without causing a kink phenomenon.

先ず、薄鋼板のキンク現象が発生するメカニズムについて発明者らが詳細に検討したところ、巻き取られた薄鋼板に張力が付与されていて薄鋼板の内側と外側との間で滑ることによりコイルが縮径し、この縮径により最も内側の円形であるべき1巻きないし数巻き部分が内側に撓んで、この数巻き部分の周方向の一部が内側に座屈変形することが分かった。   First, the inventors examined in detail the mechanism of the occurrence of the kink phenomenon of the thin steel sheet. The diameter was reduced, and it was found that one or several turns, which should be the innermost circular shape, bend inward due to the diameter reduction, and a part in the circumferential direction of the several turns was buckled and deformed inward.

また、かかるキンク現象が発生する前提は、巻き取る薄鋼板には防錆油が塗布されることにより品質が維持されるようになっていることである。この防錆油の塗布がなければ、薄鋼板表面の摩擦力により、薄鋼板に張力が付与されても巻き取り時に内側と外側との間で大きく滑ることがないからコイルが縮径することがないし、したがってキンク現象も発生しない。しかし、鋼板コイルの防錆処理のために防錆油の塗布が必要になるため、特に薄鋼板においてキンク現象が発生しやすくなっている。   Moreover, the premise that such a kink phenomenon occurs is that the quality is maintained by applying antirust oil to the thin steel sheet to be wound. Without the application of this rust-preventing oil, even if tension is applied to the thin steel sheet due to the frictional force on the surface of the thin steel sheet, the coil does not slide greatly between the inside and the outside during winding, and the coil may be reduced in diameter. Therefore, the kink phenomenon does not occur. However, since it is necessary to apply a rust-preventing oil for the rust-proofing treatment of the steel sheet coil, the kink phenomenon tends to occur particularly in a thin steel sheet.

そこで、本発明は、薄鋼板に防錆油を塗布しつつ、コイル内側の一部の塗油量を制御して巻き取り時のキンク現象を防止するものである。
本発明の第一の態様の薄鋼板の巻き取り方法は、引張強度440MPa以下の薄鋼板をリールに巻き取るに際し、その薄鋼板における先端から2m〜20mの範囲内に設定される巻き取り開始部への塗布防錆油量を、この巻き取り開始部の後の部分の塗布防錆油量よりも少なくするものであり、前記薄鋼板には表面粗度がRa=0.2μmを超えかつ1.65μm以下のものを用い、前記巻き取り開始部への塗布防錆油量を、0g/m とするとともに、前記薄鋼板の前記巻き取り開始部の内側に防錆のための包装を施すことを特徴とするものである。ここで、引張強度440MPa以下の薄鋼板は、一般的に軟材質ないし一般材と呼ばれる薄鋼板である。
Therefore, the present invention prevents a kink phenomenon during winding by applying a rust preventive oil to a thin steel sheet and controlling a part of the oil inside the coil.
The winding method of the thin steel plate of the first aspect of the present invention is a winding start portion set within a range of 2 to 20 m from the tip of the thin steel plate when winding a thin steel plate having a tensile strength of 440 MPa or less onto a reel. The amount of coating rust-preventive oil is less than the amount of coating rust-preventing oil after the winding start portion, and the surface roughness of the thin steel sheet exceeds Ra = 0.2 μm and 1 .65 μm or less is used , the amount of rust preventive oil applied to the winding start portion is set to 0 g / m 2, and rust prevention packaging is applied to the inside of the winding start portion of the thin steel plate. It is characterized by this. Here, a thin steel plate having a tensile strength of 440 MPa or less is a thin steel plate generally called a soft material or a general material.

また、本発明の第の態様の薄鋼板の巻き取り方法は、前記第一態様において、前記薄鋼板には板厚が0.6mm以下のものを用いることを特徴とするものである。 The second steel sheet winding method aspect of the invention, in the first aspect, wherein the thin steel sheet is characterized in that to use a plate thickness of 0.6mm or less.

た、本発明の第の態様の製造方法は、前記第一ないし第のいずれか一態様の方法を用いて、薄鋼板をコイルに巻き取ることにより、表面形状の優れた鋼帯コイルを製造するものである。 Also, the manufacturing method of the third aspect of the present invention, using the method of the first to second in any one embodiment, by winding the steel sheet in a coil, excellent steel strip coil surface shape Is to be manufactured.

この発明によれば、例えば塗油量が多い状態で内径20インチに薄鋼板を巻き取るというキンク現象が発生し易い条件下でも、巻き取り開始部の塗油量を減らすだけでキンク現象を抑制して巻き取ることができる。また、この発明を用いることにより、表面形状の優れた鋼帯コイルを製造することができる。   According to the present invention, for example, even if the kink phenomenon in which a thin steel sheet is wound up to an inner diameter of 20 inches with a large amount of oil coating is likely to occur, the kink phenomenon can be suppressed only by reducing the oil coating amount at the winding start portion. And can be wound up. Further, by using this invention, a steel strip coil having an excellent surface shape can be manufactured.

コイルのキンク現象を表す斜視図。The perspective view showing the kink phenomenon of a coil. 塗油量とキンク現象の発生割合との関係を示すグラフ。The graph which shows the relationship between the amount of oil coating and the generation | occurrence | production ratio of a kink phenomenon. 薄鋼板のコイルの径方向の位置と塗油量との関係を示すグラフ。The graph which shows the relationship between the position of the radial direction of the coil of a thin steel plate, and the amount of oil coating. 本発明を実施する装置の一例を示す説明図。Explanatory drawing which shows an example of the apparatus which implements this invention.

以下に本発明を実施形態に基づいて説明する。まず、発明者らは、キンク現象は巻き取られた薄鋼板の最も内側にある1巻きないし数巻き部分が内側に撓んで発生することに着目して、これらの部分を含めて、薄鋼板の先端から所定長さまでの巻き取り開始部が縮径しないようにすることの発想を得た。そして、巻き取り開始部を始めとするコイルの縮径は薄鋼板の張力によるコイル内での滑りに原因があるので、少なくとも前記巻き取り開始部の滑りを防止できれば、ここで縮径を防止できてキンク現象は生じないとの知見を得て本発明の完成を見たのである。   Hereinafter, the present invention will be described based on embodiments. First, the inventors noticed that the kink phenomenon occurs when the innermost winding or several winding portions of the wound thin steel plate are bent inward, and including these portions, The idea of preventing the winding start portion from the tip to a predetermined length from being reduced in diameter was obtained. And since the diameter reduction of the coil including the winding start part is caused by slip in the coil due to the tension of the thin steel plate, at least if the slip of the winding start part can be prevented, the diameter reduction can be prevented here. He obtained the knowledge that the kink phenomenon does not occur and saw the completion of the present invention.

このため、薄鋼板のコイルの内周部、特に前記巻き取り開始部の防錆油の塗布量を少なく、又は塗油量をゼロ(塗油しない)にすれば、この部分の摩擦力が大きくなるため、この部分の縮径がなくなり、キンク現象の発生を抑制できる。
巻き取り開始部の巻き取り張力を変更する方法や鋼板の伸張率を変更する方法では、キンク現象の発生率を軽減することはできるが、特に薄鋼板が軟質材(引張強度300MPa以下)でコイル内径が20インチという小径になる場合では一定の割合でキンク現象が発生する。しかし、巻き取り開始部の塗油量を少なくすることで、内外の薄鋼板どうしの間の摩擦力を上げてキンク現象の発生を防止することができる。また、薄鋼板が前記の軟質材ではなく一般材(引張強度300MPaを超え、同440MPa以下の範囲)であっても、塗油量が多いとき(1.0g/mを超え、2.0g/m以下の範囲)にはキンク現象が発生することがあるが、この場合にも巻き取り開始部の塗油量を少なくすることで、同様にキンク現象の発生を防止できる。
For this reason, if the amount of rust preventive oil applied to the inner peripheral portion of the coil of the thin steel plate, particularly the winding start portion is small or the amount of oil applied is zero (no oil is applied), the frictional force of this portion increases. Therefore, the diameter of this portion is eliminated and the occurrence of the kink phenomenon can be suppressed.
The method of changing the winding tension at the winding start portion and the method of changing the elongation rate of the steel sheet can reduce the rate of occurrence of the kink phenomenon, but the thin steel sheet is a soft material (tensile strength of 300 MPa or less) and the coil. When the inner diameter is as small as 20 inches, the kink phenomenon occurs at a constant rate. However, by reducing the amount of oil applied to the winding start portion, it is possible to increase the frictional force between the inner and outer thin steel plates and prevent the occurrence of the kink phenomenon. Further, even if the thin steel plate is not a soft material but a general material (a tensile strength exceeding 300 MPa and a range of 440 MPa or less), when the amount of oil coating is large (exceeding 1.0 g / m 2 and exceeding 2.0 g) In a range of less than / m 2 ), a kink phenomenon may occur. In this case as well, the occurrence of the kink phenomenon can be similarly prevented by reducing the amount of oil applied to the winding start portion.

ここで、図2に示すのが鋼板の種類別における防錆油の塗布量とキンク現象の発生割合を示すグラフであり、図2(a)が軟質材、図2(b)が一般材、図2(c)が硬質材である。いずれの場合も、板厚は0.3mmを超えかつ0.6mm以下のものを用いた。
鋼板の種類は、
軟質材:引張強度300MPa以下、
一般材:引張強度300MPa超、且つ同440MPa以下、
硬質材:引張強度440MPa超である。
Here, what is shown in FIG. 2 is a graph showing the amount of rust preventive oil applied and the rate of occurrence of the kink phenomenon for each type of steel sheet, FIG. 2 (a) is a soft material, FIG. 2 (b) is a general material, FIG. 2C shows a hard material. In either case, the plate thickness was over 0.3 mm and 0.6 mm or less.
The types of steel plates are
Soft material: tensile strength of 300 MPa or less,
General material: Tensile strength over 300 MPa and 440 MPa or less,
Hard material: Tensile strength is over 440 MPa.

また、防錆油はいずれも同一のものを用い、その塗布量を変化させた。塗布量は片面当たりの量である。このうち、
条件A:1.0g/m超、且つ2.0g/m以下、
条件B:0.6g/m超、且つ1.0g/m以下、
条件C:0.3g/m超、且つ0.6g/m以下、
条件D:0.1g/m超、且つ0.3g/m以下
条件E: 無塗油(0.1g/m以下、ゼロを含む)である。
Moreover, the same rust preventive oil was used, and the coating amount was changed. The coating amount is the amount per side. this house,
Condition A: more than 1.0 g / m 2 and 2.0 g / m 2 or less,
Condition B: more than 0.6 g / m 2 and 1.0 g / m 2 or less,
Condition C: more than 0.3 g / m 2 and 0.6 g / m 2 or less,
Condition D: More than 0.1 g / m 2 and 0.3 g / m 2 or less Condition E: Oil-free (0.1 g / m 2 or less, including zero).

ちなみに、使用した防錆油は、動粘度が40℃において13.5mm/s以上で16.5mm/s以下(JIS K 2283)である。また、テンションリールによる巻き取り張力は、0.8kg/mm以上で8.0kg/mm以下の範囲とし、テンションリールによる巻き取り径は、内径が20インチ(503〜513mm)と24インチ(605〜615mm)の2つの種類について行なった。 Incidentally, the used rust preventive oil has a kinematic viscosity of 13.5 mm 2 / s to 16.5 mm 2 / s (JIS K 2283) at 40 ° C. Further, the take-up tension by the tension reel, and 8.0 kg / mm 2 or less in the range 0.8 kg / mm 2 or more, the winding diameter by tension reel has an inner diameter of 20 inches (503~513Mm) and 24 inches ( (605 to 615 mm).

その結果、軟質材の場合には図2(a)に示すように、内径が20インチの場合には、条件A、条件B、条件Cにおいて図示の割合でキンク現象が発生し、内径が24インチの場合には条件A、条件Bにおいて図示の割合でキンク現象が発生した。しかし、条件Dと条件Eの場合には内径が前記のいずれにおいてもキンク現象は発生していない。また一般材の場合には、図2(b)に示すように、条件Aの場合に内径が20インチのときに6%程度の割合でキンク現象が発生し、内径が24インチのときでも2%程度の発生が見られた。しかし、硬質材の場合には、図2(c)に示すようにキンク現象は全く見られなかった。このように、鋼板の引張強度が小さいほどキンク現象が発生している。   As a result, in the case of a soft material, as shown in FIG. 2A, when the inner diameter is 20 inches, the kink phenomenon occurs in the ratio shown in the conditions A, B and C, and the inner diameter is 24. In the case of inches, the kink phenomenon occurred at the ratio shown in the conditions A and B. However, in the conditions D and E, the kink phenomenon does not occur regardless of the inner diameter. In the case of a general material, as shown in FIG. 2B, in the case of condition A, a kink phenomenon occurs at a rate of about 6% when the inner diameter is 20 inches, and even when the inner diameter is 24 inches, 2 Occurrence of about% was observed. However, in the case of a hard material, no kink phenomenon was observed as shown in FIG. Thus, the kink phenomenon occurs as the tensile strength of the steel sheet decreases.

これらから、軟質材及び一般材において、キンク現象が発生しない範囲で防錆油を塗布するには、望ましくは条件Dか、或いは塗布しない無塗油(条件E)にすればよいことが分かる。
そこで、薄鋼板の巻き取り開始部には条件Dまたは無塗油としてテンションリールで巻き取りを行なう。巻き取り開始部としては、薄鋼板の先端から2m〜20mの範囲を具体例とする。ここで2m未満の場合にはコイルの内周に表れる面になるので、対向して接する面同士の間の摩擦力には影響しないから、条件Dまたは無塗油の処理の対象としない。また、先端から20m超についてはキンク現象の発生防止の効果に変化はないので、条件Dまたは無塗油の前記処理をしない。
From these, it can be seen that, in the soft material and the general material, in order to apply the rust-preventing oil in a range where the kink phenomenon does not occur, it is desirable to set the condition D or the non-applied oil (condition E) not applied.
Therefore, the winding start portion of the thin steel sheet is wound with a tension reel as Condition D or no oil coating. As a winding start part, the range of 2-20 m from the front-end | tip of a thin steel plate is made into a specific example. When the distance is less than 2 m, the surface appears on the inner circumference of the coil, and therefore does not affect the frictional force between the surfaces that face each other, so that it is not subject to the condition D or non-oiled treatment. Further, since the effect of preventing the occurrence of the kink phenomenon is not changed for the length of more than 20 m from the tip, the condition D or the above-described treatment without oil coating is not performed.

塗油量については、片面あたり0.3g/m以下にするのが望ましい。0.3g/m超でも一定の効果はあるが、キンク現象の発生頻度が高くなるので前記がよい。なお塗油量が少ない場合には薄鋼板に錆の発生の懸念があるから、巻き取り開始部の塗油量は0.15g/m以上とすることが好ましく、さらに塗油ムラの発生が懸念されるため、塗油ムラがあっても錆の発生を抑制することができる0.2g/m以上とすることがさらに望ましい。上記の各例は薄鋼板の両面の塗油を実行した例であるが片面の塗油でも同様の効果を得ることができる。なお、巻き取り開始部の塗油量をゼロとする場合には、コイル内側のこの部分につき防錆のための包装を施すとよい。 The oil coating amount is desirably 0.3 g / m 2 or less per side. Even if it exceeds 0.3 g / m 2 , there is a certain effect. When the amount of oil coating is small, there is a concern that rust may be generated on the thin steel sheet. Therefore, the amount of oil coating at the winding start portion is preferably set to 0.15 g / m 2 or more, and the occurrence of uneven oil coating is further caused. Since there is concern, it is more desirable to set it to 0.2 g / m 2 or more that can suppress the occurrence of rust even if there is uneven coating of oil. Each of the above examples is an example in which the application of oil on both sides of a thin steel plate is performed, but the same effect can be obtained by applying oil on one side. In addition, when making the amount of oil coating of a winding start part zero, it is good to give the packaging for rust prevention about this part inside a coil.

薄鋼板の表面粗度をRa=0.2μmを超えるものとしたのは、薄鋼板の表面は粗さが大きいほどコイルの内側に近い部分の鋼板どうしの摩擦力が大きくなってキンク現象の発生を抑制することができ、よって望ましい粗度といえる。しかし、Ra=0.2μm以下では摩擦力が小さいからキンク現象が発生しやすくなるおそれがある。また粗度の上限を1.65μmとしたのは、これを超えると鋼板粗度を決定するワークロールの制御が困難になるため、これを超える粗度は採用することが難しくなるからである。   The reason why the surface roughness of the thin steel sheet exceeds Ra = 0.2 μm is that the surface roughness of the thin steel sheet increases the frictional force between the steel sheets closer to the inside of the coil and causes the kink phenomenon. Therefore, it can be said that this is a desirable roughness. However, if Ra = 0.2 μm or less, the frictional force is small, so that there is a possibility that the kink phenomenon is likely to occur. The upper limit of the roughness is set to 1.65 μm because if it exceeds the upper limit, it becomes difficult to control the work roll that determines the roughness of the steel sheet.

図3は、薄鋼板のコイルの径方向の位置と塗油量との関係を示しており、図3(a)は本発明に相当し、図3(b)は従来技術に相当する。つまり、図3(b)ではコイルの内周端から外周端まで片面あたり1.0〜2.0g/mの同一の塗油量であることを示しており、ここでは巻き取り開始部にキンクが発生している。これに対して図3(a)は、巻き取り開始部の塗油量が条件Dまたは無塗油であり、それより外周端までは従来技術と同様の塗油量としており、ここでは巻き取り開始部にキンクは発生していないことが示されている。 FIG. 3 shows the relationship between the radial position of the coil of the thin steel plate and the amount of oil coating. FIG. 3 (a) corresponds to the present invention, and FIG. 3 (b) corresponds to the prior art. That is, FIG. 3B shows that the same oil amount is 1.0 to 2.0 g / m 2 per side from the inner peripheral end to the outer peripheral end of the coil. A kink has occurred. On the other hand, FIG. 3A shows that the amount of oil applied at the winding start portion is Condition D or no oil coating, and the oil amount is the same as that of the prior art until the outer peripheral edge. It is shown that no kink has occurred at the start.

図4は、本発明を実施する装置の一例を示すもので、薄鋼板Aが調質圧延機6により調質圧延された後にブライドルロール4を通過して、ここで張力を付与されて撓みがなくなり、オイラー7により表裏又はそれらのいずれかに塗油されてからピンチロール2に至る。その後に薄鋼板Aはシャー3を経由してテンションリール5に至り、ここで巻き取られてコイル8が形成される。ブライドルロール4の入側にはトラッキング装置9があって、ここで薄鋼板Aの溶接位置の通過を検出する。この検出された溶接位置がシャー3に至ったときに薄鋼板Aは切断されて、切断位置の前側が先行する薄鋼板Aの尾端となって、前側の薄鋼板Aで先のコイル8が巻き終わる。なお、図4中の符号1はデフレクターロールを示す。   FIG. 4 shows an example of an apparatus for carrying out the present invention. After the thin steel plate A is temper-rolled by the temper rolling mill 6, it passes through the bridle roll 4, where tension is applied and bending occurs. The oil is applied to the front and back or one of them by the Euler 7 and then reaches the pinch roll 2. Thereafter, the thin steel plate A reaches the tension reel 5 through the shear 3 and is wound up to form the coil 8. A tracking device 9 is provided on the entry side of the bridle roll 4 and detects the passage of the welding position of the thin steel plate A here. When the detected welding position reaches the shear 3, the thin steel sheet A is cut, and the front side of the cutting position becomes the tail end of the preceding thin steel sheet A, and the preceding coil 8 is formed on the front thin steel sheet A. Finish winding. In addition, the code | symbol 1 in FIG. 4 shows a deflector roll.

一方、切断位置から後側の薄鋼板Aで次のコイル8の巻き取りが開始され、よって、前記切断位置の後側の後続の薄鋼板Aの先端がコイルの内径側の先端になる。このシャー3での切断前に、切断後の後続の薄鋼板Aの先端になる位置から始まる次のコイルの巻き取り開始部に相当する位置には、オイラー7での塗油量が前記のように条件Dまたは無塗油となるように制御される。これは、トラッキング装置9により検出されて出力された溶接位置の情報が計算機に入力され、この計算機からの処理情報が入力された制御装置PLCによってオイラー7が制御される。すなわち、前記コイルの巻き取り開始部に相当する位置がオイラー7を通過するタイミングで、オイラー7が前記のようなゼロか少ない塗油量になるように制御される。オイラー7による塗油の方法は、静電塗油である。したがって、オイラー7通過後の薄鋼板Aは、シャー3で切断されて形成された後続の部分の先端からテンションリール5にて巻き取られるときには、巻き取り開始部の塗油量がすでに前記のように制御されている。よって、巻き取り開始部では内外の薄鋼板間で滑りが生じないから、ここでの縮径は生じない。このため、キンク現象は発生することがない。このように、本発明の薄鋼板の巻取り方法を適用することにより、表面形状の優れた鋼帯コイルを製造することが可能となる。   On the other hand, the winding of the next coil 8 is started by the thin steel plate A on the rear side from the cutting position, so that the tip of the subsequent thin steel plate A on the rear side of the cutting position becomes the tip on the inner diameter side of the coil. Before cutting with this shear 3, the amount of oil applied by the Euler 7 is as described above at the position corresponding to the winding start portion of the next coil starting from the position that becomes the tip of the subsequent thin steel plate A after cutting. The condition D is controlled so that no oil is applied. The information of the welding position detected and output by the tracking device 9 is input to the computer, and the Euler 7 is controlled by the control device PLC to which the processing information from the computer is input. That is, at the timing when the position corresponding to the winding start portion of the coil passes through the Euler 7, the Euler 7 is controlled so that the oil amount becomes zero or less as described above. The method of oiling by the Euler 7 is electrostatic oiling. Therefore, when the thin steel plate A after passing through the Euler 7 is wound up by the tension reel 5 from the tip of the subsequent portion formed by cutting with the shear 3, the amount of oil applied at the winding start portion is already as described above. Is controlled. Therefore, since no slip occurs between the inner and outer thin steel plates at the winding start portion, no diameter reduction occurs here. For this reason, the kink phenomenon does not occur. Thus, it becomes possible by manufacturing the winding method of the thin steel plate of this invention to manufacture the steel strip coil excellent in surface shape.

A 薄鋼板
5 リール(テンションリール)
7 オイラー
8 コイル
A Thin steel plate 5 Reel (Tension reel)
7 Euler 8 Coil

Claims (3)

引張強度440MPa以下の薄鋼板をリールに巻き取るに際し、その薄鋼板における先端から2m〜20mの範囲内に設定される巻き取り開始部への塗布防錆油量を、この巻き取り開始部の後の部分の塗布防錆油量よりも少なくするものであり、
前記薄鋼板には表面粗度がRa=0.2μmを超えかつ1.65μm以下のものを用い
前記巻き取り開始部への塗布防錆油量を、0g/m とするとともに、前記薄鋼板の前記巻き取り開始部の内側に防錆のための包装を施すことを特徴とする薄鋼板の巻き取り方法。
When winding a thin steel plate having a tensile strength of 440 MPa or less on a reel, the amount of rust preventive oil applied to the winding start portion set within a range of 2 to 20 m from the tip of the thin steel plate is set after this winding start portion. Less than the amount of rust preventive oil applied to
The thin steel plate has a surface roughness of Ra = 0.2 μm and 1.65 μm or less ,
The amount of rust preventive oil applied to the winding start portion is set to 0 g / m 2, and packaging for rust prevention is performed on the inner side of the winding start portion of the thin steel plate. Winding method.
前記薄鋼板には板厚が0.6mm以下のものを用いることを特徴とする請求項に記載の薄鋼板の巻き取り方法。 The method for winding a thin steel plate according to claim 1 , wherein the thin steel plate has a thickness of 0.6 mm or less. 請求項1又は2に記載の方法を用いて、薄鋼板をコイルに巻き取ることにより、表面形状の優れた鋼帯コイルを製造する方法。 A method for producing a steel strip coil having an excellent surface shape by winding a thin steel plate around the coil using the method according to claim 1 .
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