JP3947284B2 - Method for manufacturing rolled coil - Google Patents

Description

【００１２】
【発明の実施の形態】
図１は、レバースミル型の圧延機４を示し、図２は、供給・巻取りリール３ａ，３ｂの駆動部、図３は、供給・巻取りリール３ａ，３ｂの概略断面図を示している。
レバースミル型の圧延機４は、圧延ロール２の両側に供給・巻取りリール３ａ，３ｂが配設され、一側方の供給・巻取りリール３ｂ側には、ペイオフリール１０が配設され、ペイオフリール１０に装着されたコイル原材５がスリーロールフィーダー６をへて圧延ロール２に供給され、圧延ロール２の上下ロール間にて金属板１が圧延され、一方の供給・巻取りリール３ａの駆動回転にて巻取り、次に、他方の供給・巻取りリール３ｂが駆動回転されて、一方の供給・巻取りリール３ａの金属板１が圧延ロール２に通されて再度圧延がおこなわれ、圧延された金属板１が他方の供給・巻取りリール３ｂに巻取られるものである。このようなレバースミル型の圧延機４によって、金属板１を複数回圧延するのである。このようなレバースミル型の圧延機４の構成は周知なものである。
【００１３】
供給・巻取りリール３ａ，３ｂは、図２及び図３に示すように、軸状の芯金７が軸受け１１にて回転自在にかつ軸芯方向に移動自在に保持され、電動モータにてカップリング１２を介して駆動回転され、そして、ピストン１３の両側に油室１４，１５を形成したシリンダー９にて軸芯方向に駆動移動自在になされるとともに、シリンダー９にかかる油圧力により、芯金７が軸芯方向に移動するのを阻止するようにしている。
【００１４】
芯金７の外周には、周方向に複数に分割したセグメント８…が外装されている。芯金７には楔状の傾斜面７ａが軸芯方向に間隔を隔てて形成され、セグメント８には斜面８ａが形成され、しかして、軸芯方向の位置決めがなされているセグメント８…に対して、芯金７を軸芯方向に移動させることで、セグメント８を半径方向に移動させて、供給・巻取りリール３ａ，３ｂの外径を変更可能にしている。つまり、圧油口１７から作動油が油室１４に供給されてピストン１３を図２の右方に移動させて、リール径ｄを縮小し、また、圧油口１７から作動油が油室１５に供給されてピストン１３を同図の左方に移動させて、リール径ｄを拡大できるようにしている。
【００１５】
このように、供給・巻取りリール３ａ，３ｂの外径を変更することで、圧延された金属板１を供給・巻取りリール３ａ，３ｂに巻取る場合に、圧延を能率よくおこなうとともに品質のよい板を得るため、供給・巻取りリール３ａ，３ｂで金属板に張力をかけながら巻取るものである。このとき、供給・巻取りリール３ａ，３ｂに巻取られた金属板１が巻太るにしたがって生じる巻太りのための金属板１による巻締め力は比例的に増大するのであり、供給・巻取りリール３ａ，３ｂには大なる圧縮力が作用するのであり、この巻締め力のため供給・巻取りリール３ａ，３ｂを構成する複数枚のセグメント８…は半径方向に収縮し、傾斜面７ａ及び斜面８ａによる楔機能を介してセグメント８…にて押圧された芯金７が軸芯方向に逃げるようにしている。つまり、金属板１が巻太る程、リリーフ弁１８から排油がなされ、セグメント８の外径が細くなり、供給・巻取りリール３ａ，３ｂの径が細くなり、芯金７及びセグメント８を保護するのである。
【００１６】
ところで、レバースミル型の圧延機４を使って圧延をおこなう中間パスの圧延時には、芯金７は自由に軸芯方向に移動でき、巻取り張力に応じて供給・巻取りリール３ａ，３ｂの径が変更されて、芯金７にセグメント８を介しての過大な押圧力がかかるのを回避し、芯金７の損傷を回避し、供給・巻取りリール３ａ，３ｂの寿命を短くするのを回避するものである。
【００１７】
そして、最終の圧延（仕上げ圧延）工程においてのみ、圧延される金属板１の板厚，幅Ｗ，巻取り外径Ｄに起因する特定の巻取り最大張力を見越して、供給・巻取りリール３ａの最小径を規制するようにリール径制御手段を制御するのである。具体的には、最終に圧延される金属板１の板厚，幅Ｗ，巻取り外径Ｄに起因する特定の巻取り最大張力に対抗できるようにするのであり、即ち、シリンダー９への油圧回路のリリーフ弁１８のリリーフ圧を設定変更することで、芯金７がそれ以上移動するのを阻止するようにするものである。即ち、図４に示すように、比例制御（電磁）弁１９をアンプ２０からの電気入力信号に比例した出力（圧力流量）の制御をおこない、油路ａ，ｂ，ｃの圧力を制御し、リリーフ弁１８のリリーフ圧を変更するようにしている。図中２１ａ，２１ｂは減圧弁、２２は可変絞り弁、２３は電磁パイロット切換弁、２４ａ，２４ｂはスロットルストップチェック弁である。そして、このような油圧回路の構成は変更することができ、要するに、リリーフ弁１８の排油を段階的にロックできるようにすればよい。
【００１８】
以上のようなコイルの製造方法によれば、最終圧延以外の圧延においては、リール径制御手段は制御されることがなく、つまり、中間パスにおいては、供給・巻取りリール３ａ，３ｂのリール径ｄは巻取り荷重に応じて変更され、供給・巻取りリール３を損傷するのを回避し、レバースミル型の圧延機により生産性を高める圧延をおこなうことができながら、最終圧延工程においては、圧延される金属板１の板厚，幅Ｗ，巻取り外径Ｄに起因する特定の巻取り最大張力を見越して、供給・巻取りリール３ａのリール径制御手段により、供給・巻取りリール３ａの最小径を規制するように制御することで、供給・巻取りリール３ａは、最終に圧延される金属板１の板厚，幅Ｗ，巻取り外径Ｄに起因する特定の巻取り最大張力には耐えて、損傷されたり、寿命が短くなるのを回避しながら、不測に巻取り最大張力を越えるような場合には、この時だけ、供給・巻取りリール３ａが収縮しないように制御されて、供給・巻取りリール３ａの径が収縮することで、仕上がりコイルＣの中心部分の緩みを回避し、製造されたコイルＣが崩れるのを回避できるのである。
【００１９】
【発明の効果】
請求項１の発明においては、圧延ロールの両側に、巻取荷重の変更に応じて、リール径の縮小、拡大が可能な供給・巻取りリールを備え、供給・巻取りリールのリール径を制御するリール径制御手段を備え、圧延ロールの一側方に配設された供給・巻取りリールに巻取られた金属板を圧延ロールを通して圧延するとともに圧延ロールの他側方に配設された供給・巻取りリールにて巻取り、次に、他方の供給・巻取りリールに巻取られた金属板を圧延ロールを通して再度圧延するとともに一方の供給・巻取りリールに巻取るという圧延機により金属板を複数回圧延してコイルを製造する圧延コイルの製造方法であって、圧延回数を設定して中間パスにおいては、リール径制御手段を制御せず巻取荷重に従ってリール径が自動的に拡縮しうるようにするとともに、最終の圧延工程においてのみ、最終に圧延される金属板の板厚，幅，巻取り外径等に起因する特定の巻取り最大張力をリール径制御手段に入力設定して、上記供給・巻取りリールの最小径を所定の径に設定するから、最終圧延以外の圧延（中間パス）においては、リール径制御手段は制御されることがなく、供給・巻取りリールは巻取り荷重に応じて変更され、供給・巻取りリールを損傷するのを回避し、レバースミル型の圧延機により生産性を高める圧延をおこなうことができながら、最終圧延工程においては、圧延される金属板の板厚，幅，巻取り外径に起因する特定の巻取り最大張力を見越して、供給・巻取りリールのリール径制御手段により、供給・巻取りリールの最小径を所定の径に設定することで、不測に巻取り最大張力を越えるような場合にも、供給・巻取りリールが収縮しないように制御されて、供給・巻取りリールの径が収縮することで、コイルの中心部分の緩みを回避し、製造されたコイルが崩れるのを回避できるという利点がある。
【図面の簡単な説明】
【図１】本発明のコイルの製造方法において使用するレバースミル型圧延機の概略側面図である。
【図２】供給・巻取りリールの駆動部を示す概略断面図である。
【図３】（ａ）（ｂ）は供給・巻取りリールの概略断面図である。
【図４】油圧回路図である。
【符号の説明】
１ 金属板
２ 圧延ロール
３ａ 供給・巻取りリール
３ｂ 供給・巻取りリール
４ 圧延機[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a rolling coil, and more specifically, rolls a metal plate wound around a supply / take-up reel disposed on one side of the rolling roll through the rolling roll and the other side of the rolling roll. Next, the metal plate wound on the other supply / take-up reel is rolled again through a rolling roll and wound on one supply / take-up reel. Regarding the rolling coil manufacturing method of rolling a metal plate a plurality of times by a rolling mill to manufacture a coil, more specifically, while significantly increasing productivity, so as not to damage the supply and take-up reel that is subjected to great stress, The present invention also relates to a technique for extending the life and preventing the coil removed from the supply / take-up reel from being broken.
[0002]
[Prior art]
Conventionally, a metal plate wound on a supply / take-up reel arranged on one side of a rolling roll is rolled through the rolling roll and a supply / take-up reel arranged on the other side of the rolling roll. Next, the metal plate wound on the other supply / take-up reel is rolled again through a rolling roll, and the metal plate is rolled a plurality of times by a lever mill type rolling mill that takes up the other supply / take-up reel. The coil is rolled to a desired thickness, a metal plate is wound on the supply / take-up reel in a coil state, and the coil is extracted by shrinking the diameter of the supply / take-up reel.
[0003]
[Problems to be solved by the invention]
Generally, when a rolled metal plate is wound around a supply / take-up reel, the metal plate is wound while applying tension to the metal plate with the supply / take-up reel in order to efficiently perform rolling and to obtain a high-quality plate. For this reason, as the metal plate wound on the supply / take-up reel is rolled up, the tightening force by the metal plate for thickening is proportionally increased, and the supply / take-up reel has a large compressive force. Works. Due to this tightening force, the plurality of segments constituting the supply / take-up reel contract in the radial direction so that the angled core pressed by the segment via the wedge function escapes in the axial direction. .
[0004]
By the way, the conventional reel diameter control configuration of the supply / take-up reel is such that the amount of movement of the cored bar is kept within a certain range as disclosed in Japanese Utility Model Laid-Open No. 54-50025. In such a control configuration, the outer diameter of the segment is reduced within the range, and the supply / take-up reel can be contracted, but the segment can be moved in contact with the mandrel beyond that range. For this reason, there was a problem that the segment and the wedge portion of the metal core were damaged by an excessive pressing force, or the coil collapsed when being extracted from the reel due to excessive contraction.
[0005]
On the other hand, the coil removed from the supply / take-up reel is placed on a sleeper and stored, but the supply / take-up reel does not exist in the center hole of the coil and the outer periphery of the coil is pressed. When the coil is pulled out, a load is applied to the coil in the tangential direction, and the central hole portion of the hoop-shaped coil removed from the supply / take-up reel naturally collapses toward the center side, so-called back Rings often occurred and the central hole of the coil was frequently destroyed.
[0006]
Thus, when the central hole of the coil collapses, the coil itself cannot be shipped, and cannot be sent to the next plating process, for example, and the coil becomes a defective product, resulting in a great loss.
Therefore, as a means of avoiding such collapse of the central hole, leave a thick portion that does not roll at the beginning of winding of the coil, and wrap the thick portion several times to reinforce the central hole portion However, in order to leave the thick part that does not roll in this way long, in each rolling process of rolling a metal plate multiple times with a lever mill type rolling mill, it is performed each time, and productivity However, there is a problem that the number of parts to be discarded increases and the yield decreases.
[0007]
The present invention is intended to solve such a problem, and while performing continuous rolling by a rolling mill, while significantly increasing productivity, so as not to damage the supply and take-up reel that takes a great load, Another object of the present invention is to provide a method for manufacturing a rolled coil in which the coil removed from the supply / take-up reel does not collapse.
[0008]
[Means for Solving the Problems]
According to the first aspect of the present invention, supply and take-up reels 3a and 3b are provided on both sides of the rolling roll 2 so that the reel diameter can be reduced and expanded in accordance with the change in the take-up load. , 3b is provided with reel diameter control means for controlling the reel diameter, and the metal plate 1 wound around the supply and take-up reel 3a disposed on one side of the rolling roll 2 is rolled through the rolling roll 2 and rolled. Winding is performed by the supply / take-up reel 3b disposed on the other side of the roll 2, and then the metal plate 1 wound on the other supply / take-up reel 3b is rolled again through the rolling roll 2. a method of manufacturing a rolling coil for producing a coil by rolling several times a metal plate 1 by the rolling mill of taking one winding to supply and take-up reel 3a of the intermediate path by setting the rolling count, reel diameter Control the control means Together so that the reel diameter can scaled automatically according winding load is not, in the final rolling step alone, the thickness of the metal plate 1 to be rolled to a final width W, due to the winding outer diameter D and the like A specific maximum winding tension is input and set to the reel diameter control means, and the minimum diameter of the supply / take-up reels 3a and 3b is set to a predetermined diameter.
[0009]
In the configuration of claim 1 , in the rolling other than final rolling, the reel diameter control means is not controlled, and the supply / take-up reels 3a and 3b are changed in accordance with the take-up load. While avoiding damage to the reels 3a and 3b and performing rolling to increase productivity with a lever mill type rolling mill, in the final rolling step, the thickness, width W, and winding of the metal plate 1 to be rolled. When the maximum take-up tension is unexpectedly exceeded by setting the minimum diameter of the supply and take-up reels 3a, 3b to a predetermined diameter in anticipation of a specific take-up maximum tension due to the outer diameter D, etc. In addition, the supply and take-up reels 3a and 3b are controlled so as not to contract, and the diameter of the supply and take-up reels 3a and 3b contracts to avoid loosening of the central portion of the coil C. Coil C collapses The can be avoided.
[0010]
By the way, the specific winding maximum tension is a damage to the supply / winding reels 3a and 3b when the thickness, width W, winding outer diameter D, etc. of the metal plate 1 obtained by rolling are determined. There is a fear that the maximum winding tension and the maximum winding tension that requires a certain level of tightening force so that the center hole of the manufactured coil C does not collapse. These values are based on many years of experience and many experiments. This is well known from the results. A specific example is shown below.
[0011]
[Table 1]

[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a lever mill type rolling mill 4, FIG. 2 shows a drive unit for the supply / take-up reels 3 a and 3 b, and FIG. 3 shows a schematic cross-sectional view of the supply / take-up reels 3 a and 3 b.
The lever mill type rolling mill 4 is provided with supply / take-up reels 3a and 3b on both sides of the roll 2, and a payoff reel 10 is provided on one side of the supply / take-up reel 3b. The coil raw material 5 mounted on the reel 10 is supplied to the rolling roll 2 through the three-roll feeder 6, the metal plate 1 is rolled between the upper and lower rolls of the rolling roll 2, and one of the supply / winding reels 3a Winding by drive rotation, then the other supply / take-up reel 3b is driven and rotated, the metal plate 1 of one supply / take-up reel 3a is passed through the rolling roll 2 and rolled again, The rolled metal plate 1 is wound around the other supply / take-up reel 3b. The metal plate 1 is rolled a plurality of times by such a lever mill type rolling mill 4. Such a structure of the lever mill type rolling mill 4 is well known.
[0013]
As shown in FIGS. 2 and 3, the supply and take-up reels 3a and 3b are configured such that a shaft-shaped metal core 7 is held rotatably by a bearing 11 and movable in the axial direction, and is cupped by an electric motor. The cylinder 9 is driven and rotated through the ring 12 and has oil chambers 14 and 15 formed on both sides of the piston 13. The cylinder 9 can be driven and moved in the axial direction. 7 is prevented from moving in the axial direction.
[0014]
On the outer periphery of the cored bar 7, segments 8... Divided into a plurality in the circumferential direction are packaged. A wedge-shaped inclined surface 7a is formed on the metal core 7 at intervals in the axial direction, and an inclined surface 8a is formed on the segment 8, so that the segment 8 is positioned in the axial direction. By moving the cored bar 7 in the axial direction, the segment 8 is moved in the radial direction so that the outer diameters of the supply and take-up reels 3a and 3b can be changed. In other words, the hydraulic oil is supplied from the pressure oil port 17 to the oil chamber 14 to move the piston 13 to the right in FIG. 2 to reduce the reel diameter d, and the hydraulic oil is supplied from the pressure oil port 17 to the oil chamber 15. The piston 13 is moved to the left in the figure so that the reel diameter d can be enlarged.
[0015]
Thus, when the rolled metal plate 1 is wound around the supply / take-up reels 3a, 3b by changing the outer diameter of the supply / take-up reels 3a, 3b, the rolling is efficiently performed and the quality is improved. In order to obtain a good plate, the supply / take-up reels 3a and 3b are wound while applying tension to the metal plate. At this time, as the metal plate 1 taken up on the supply / take-up reels 3a and 3b gets thicker, the tightening force by the metal plate 1 for the thickening generated proportionally increases. A large compressive force acts on the reels 3a and 3b. Due to this tightening force, the plurality of segments 8 constituting the supply and take-up reels 3a and 3b contract in the radial direction, and the inclined surfaces 7a and 3b The metal core 7 pressed by the segments 8 through the wedge function by the inclined surface 8a escapes in the axial direction. That is, as the metal plate 1 gets thicker, oil is discharged from the relief valve 18, the outer diameter of the segment 8 becomes thinner, the diameters of the supply / take-up reels 3 a and 3 b become thinner, and the cored bar 7 and the segment 8 are protected. To do.
[0016]
By the way, at the time of rolling in an intermediate pass in which rolling is performed using the lever mill type rolling mill 4, the cored bar 7 can be freely moved in the axial direction, and the diameters of the supply and take-up reels 3a and 3b can be adjusted according to the winding tension. It is changed to avoid applying excessive pressing force to the cored bar 7 via the segment 8, to avoid damage to the cored bar 7, and to avoid shortening the life of the supply / take-up reels 3a and 3b. To do.
[0017]
Then, only in the final rolling (finish rolling) step, the supply and take-up reel 3a is anticipated in anticipation of a specific maximum winding tension resulting from the thickness, width W, and outer diameter D of the rolled metal plate 1. The reel diameter control means is controlled so as to regulate the minimum diameter. Specifically, a specific maximum winding tension caused by the thickness, width W, and winding outer diameter D of the metal plate 1 to be finally rolled can be countered, that is, the hydraulic pressure applied to the cylinder 9. By changing the setting of the relief pressure of the relief valve 18 of the circuit, the metal core 7 is prevented from moving further. That is, as shown in FIG. 4, the proportional control (electromagnetic) valve 19 controls the output (pressure flow rate) in proportion to the electric input signal from the amplifier 20, and controls the pressure in the oil passages a, b, c. The relief pressure of the relief valve 18 is changed. In the figure, 21a and 21b are pressure reducing valves, 22 is a variable throttle valve, 23 is an electromagnetic pilot switching valve, and 24a and 24b are throttle stop check valves. The configuration of such a hydraulic circuit can be changed. In short, it is only necessary to lock the drainage of the relief valve 18 in stages.
[0018]
According to the coil manufacturing method as described above, the reel diameter control means is not controlled in rolling other than the final rolling, that is, in the intermediate pass, the reel diameter of the supply / take-up reels 3a and 3b. In the final rolling process, d is changed in accordance with the winding load, avoiding damage to the supply / take-up reel 3 and capable of rolling with a lever mill type rolling mill to increase productivity. In anticipation of a specific maximum winding tension resulting from the thickness, width W, and winding outer diameter D of the metal plate 1 to be applied, the reel diameter control means of the supply / take-up reel 3a controls the supply / take-up reel 3a. By controlling so as to regulate the minimum diameter, the supply / take-up reel 3a has a specific take-up maximum tension due to the plate thickness, width W, and take-up outer diameter D of the metal plate 1 to be finally rolled. Is bearable and damaged When the maximum take-up tension is unexpectedly exceeded while avoiding shortening the service life, the supply / take-up reel 3a is controlled so as not to contract only at this time. By contracting the diameter of 3a, it is possible to avoid loosening of the center portion of the finished coil C and to prevent the manufactured coil C from collapsing.
[0019]
【The invention's effect】
According to the first aspect of the present invention, the supply and take-up reels are provided on both sides of the rolling roll so that the reel diameter can be reduced and expanded in accordance with the change of the take-up load, and the reel diameter of the supply and take-up reel is controlled A reel diameter control means, and a metal plate wound on a supply / winding reel disposed on one side of the rolling roll is rolled through the rolling roll and supplied on the other side of the rolling roll. -A metal plate is wound by a take-up reel, and then the metal plate wound on the other supply / take-up reel is rolled again through a rolling roll and wound on one supply / take-up reel. A rolling coil manufacturing method in which a coil is manufactured by rolling a plurality of times, and the reel diameter is automatically expanded or reduced according to the winding load without controlling the reel diameter control means in the intermediate pass after setting the number of rolling. Sour As well as, in the final rolling step alone, the thickness of the metal plate is rolled to a final width, type set specific winding up tension due to the winding outer diameter and the like on a reel diameter control means, the supply・ Since the minimum diameter of the take-up reel is set to a predetermined diameter, the reel diameter control means is not controlled in rolling other than final rolling (intermediate pass), and the supply / take-up reel has a take-up load. In the final rolling process, the thickness of the metal sheet to be rolled can be changed depending on the situation, while avoiding damage to the supply and take-up reels and enabling the rolling to increase productivity with a lever mill type rolling mill. By setting the minimum diameter of the supply and take-up reel to a predetermined diameter by the reel diameter control means of the supply and take-up reel in anticipation of a specific maximum take-up tension due to the width and outer diameter of the take-up reel, Winding unexpectedly Even when the maximum tension is exceeded, the supply / take-up reel is controlled so that it does not shrink, and the diameter of the supply / take-up reel shrinks to avoid loosening of the central part of the coil. There is an advantage that the coil can be prevented from collapsing.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a lever mill type rolling mill used in the method for producing a coil of the present invention.
FIG. 2 is a schematic cross-sectional view showing a drive unit of a supply / take-up reel.
FIGS. 3A and 3B are schematic cross-sectional views of a supply / take-up reel.
FIG. 4 is a hydraulic circuit diagram.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Metal plate 2 Rolling roll 3a Supply and winding reel 3b Supply and winding reel 4 Rolling machine

Claims (1)

Provided on both sides of the rolling roll with a supply and take-up reel capable of reducing and expanding the reel diameter according to the change of the take-up load, and with a reel diameter control means for controlling the reel diameter of the supply and take-up reel, A metal plate wound on a supply / take-up reel disposed on one side of the rolling roll is rolled through the rolling roll and wound on a supply / take-up reel disposed on the other side of the rolling roll. Next, the metal plate wound on the other supply / take-up reel is rolled again through a rolling roll, and the metal plate is rolled a plurality of times by a rolling mill that winds up on the one supply / take-up reel to form a coil. A rolling coil manufacturing method to be manufactured, in which the number of rollings is set, and in the intermediate pass, the reel diameter can be automatically expanded / contracted according to the winding load without controlling the reel diameter control means . rolling Only in degree, the thickness of the metal plate is rolled to a final width, type set specific winding up tension due to the winding outer diameter and the like on a reel diameter control means, the supply and take-up reel top A method for manufacturing a rolled coil, wherein the small diameter is set to a predetermined diameter.

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