WO2011055458A1 - 冷間圧延材製造設備および冷間圧延方法 - Google Patents
冷間圧延材製造設備および冷間圧延方法 Download PDFInfo
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- WO2011055458A1 WO2011055458A1 PCT/JP2009/069064 JP2009069064W WO2011055458A1 WO 2011055458 A1 WO2011055458 A1 WO 2011055458A1 JP 2009069064 W JP2009069064 W JP 2009069064W WO 2011055458 A1 WO2011055458 A1 WO 2011055458A1
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- coil
- cold rolling
- strip
- rolling
- reversible
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- 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
- B21B1/30—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 non-continuous process
- B21B1/32—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 non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
- B21B1/36—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 non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by cold-rolling
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- 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
-
- 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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/18—Automatic gauge control
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- 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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
- B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
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- 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
- B21B15/0085—Joining ends of material to continuous strip, bar or sheet
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- 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
- B21B2015/0057—Coiling the rolled product
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- 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
- B21B2015/0064—Uncoiling the rolled product
Definitions
- the present invention relates to a cold rolled material manufacturing facility and a cold rolling method.
- RCM equipment Reversible cold rolling equipment for rolling
- the end of the strip is passed through unrolled, and also in the pass after the third pass, the path switching unit Then, the front pass rolling part must be left unrolled. For this reason, there is a problem that the unrolled portion of the strip front end and the tail end is out of the product thickness range and cannot be sold as a product. Strips outside these product thicknesses are called off-gauges.
- the off-gauge ratio is defined as the off-gauge rate as the ratio of the off-gauge amount to the total production.
- the off-gauge rate in each rolling equipment is about 2.5% for the RCM equipment and about 6.0% for the 2-stand reverse equipment.
- the off-gauge rate of the PL-TCM facility in which the pickling process and the cold tandem rolling process are continued is only about 0.2%.
- the problem with reversible rolling equipment is that the off-gauge rate is about 2.5% to 6.0%, which is very high compared to PL-TCM equipment.
- Patent Document 1 the two-stand reverse facility described in Patent Document 1 generates an off-gage of about 6.0%, the yield is remarkably low, and the manufacturing cost is greatly increased.
- the rolling mill when the coil approaches the tail end of the coil in the previous pass, the rolling mill is decelerated and rolling is stopped. In the next pass, a new acceleration is performed to roll in the reverse direction of the previous pass.
- acceleration / deceleration and rolling stop are repeated by the number of passes until the desired product sheet thickness is reached, so that the actual rolling time in the operation time is short and the production efficiency is poor.
- a cold rolling mill a coil build-up line that joins multiple coils to form a long single coil, and a built-up long coil (build-up coil) are reversible a predetermined number of times.
- a cold rolling facility has been proposed that has a reversible rolling line that performs rolling and divides it into coil lengths that can be conveyed in the final pass (see Patent Document 2).
- the strip length of the build-up coil can be increased by an amount equivalent to the total length of the strips of the joined coils, and the unrolled portion of the coil leading end is the innermost circumference of the built-up coil. Since this occurs only in the outermost part and the outermost peripheral part, the off-gauge rate can be significantly reduced. Further, since the number of acceleration / decelerations at the coil tail end can be reduced by the number of joined coils, the production efficiency is improved.
- Patent Document 2 solves the problems of the prior art described in Patent Document 1 and enables high efficiency and high yield, but has the following problems.
- the first is a problem related to the complexity of the configuration and the increase in size of the apparatus.
- Patent Document 2 The prior art described in Patent Document 2 is to build up a plurality of coils to form a buildup coil, and then to roll the buildup coil, and to wind up the buildup coil for forming the buildup coil An unwinding device is required, and the number of winding and unwinding devices is increased as compared with the prior art described in Patent Document 1.
- Patent Document 2 builds up a plurality of coils to form a build-up coil having a large diameter.
- the outer diameter of the coil increases, and the coil winding force that tends to shrink toward the inner diameter side of the coil increases due to the rolling tension acting on the coil.
- Patent Document 2 requires a winding / unwinding device for a solid block type reel during rolling, and a winding device for a collaps type reel during unloading. The number of unwinding devices increases. Such a complicated structure increases initial costs.
- joining apparatuses applied to cold rolling applications are a laser beam welding machine and a flash butt welding machine that are butt joining methods. These welding machines can ensure high butt accuracy, but on the other hand, the use of a large number of high-rigidity and high-precision parts makes the equipment large and expensive compared to other joining methods.
- these welding machines are applied to large-scale production facilities that exceed 1 million tons per year, such as PL-TCM, the ratio of welding machine costs to the overall capital investment costs is relatively low, which is a problem.
- the ratio becomes large, which is problematic in terms of cost effectiveness and difficult to apply.
- Patent Document 2 forms a build-up coil, and the build-up coil becomes longer.
- the torque required for the reel is increased in a form that is linearly proportional to the outer diameter of the coil in order to apply the tension necessary for rolling with the reel, and the reel drive device becomes larger. was there.
- Patent Document 2 proposes a cold rolling facility that divides the coil into sizes that can be conveyed in the final pass.
- the rolling speed when dividing is 0 mpm.
- the rolling stops so that the stop coefficient can be generated by changing the coefficient of friction between the work roll and the strip on the surface of the strip sandwiched between the work rolls. Therefore, stop marks may be transferred to the strip surface at regular intervals at the rotation pitch of the work roll during subsequent rolling.
- this stop mark occurs in the first pass, the stop mark may become inconspicuous to a level that cannot be visually observed by continuing rolling a plurality of times.
- the quality of the surface gloss is impaired, and a material with strict quality has a problem of becoming a defective product.
- An object of the present invention is to provide a cold rolled material that maintains high efficiency and high yield and is highly cost effective in a small to medium-sized production facility with an annual production of about 300,000 to 600,000 tons. It is to provide equipment and cold rolling method.
- the reversible cold rolling method according to the first invention for solving the first problem described above includes a winding device for unwinding a coil, at least one reversible cold rolling mill, and the cold rolling mill.
- First and second winding / unwinding devices respectively disposed on the entry side and the exit side of the first path, and a joining device disposed between the unwinding device and the first winding / unwinding device.
- the first coil strip unwound from the unwinding device is directly guided to the cold rolling mill and rolled.
- a rolling step of winding around the second winding / unwinding device and a second step of continuing unwinding from the first coil tail end and the unwinding device when the first coil tail end reaches the joining device.
- a joining step for joining the coil tips, and the second and subsequent coils to be followed, And the joining step is repeated, and the first pass rolling by the cold rolling mill and the leading coil tail end and the trailing coil tip by the joining device are joined, and a plurality of coils are built up into one coil.
- a one-pass coil build-up rolling process a reversible rolling process in which the built-up coil is subjected to reversible rolling a predetermined number of times until a desired product thickness is obtained, and the build-up in the final pass of the reversible rolling process.
- a coiling process in which the coil is cut by a cutting device and wound around one of the first and second winding / unwinding devices to form a plurality of coils.
- the reversible cold rolling method according to the second aspect of the present invention for solving the above-mentioned newly occurring problem is the reversible cold rolling method according to the first aspect of the invention, in which the strip is stored between the cold rolling mill and the joining device.
- An apparatus is provided, and the rolling speed during joining of the leading coil tail end and the trailing coil tip in the joining step is more than 0 mpm and 50 mpm or less.
- the reversible cold rolling method according to the third invention for solving the above-mentioned fourth problem is the reversible cold rolling method according to any one of the first invention to the second invention, wherein the split winding is performed.
- the rolling speed at the time of dividing the coil in the final pass is more than 0 mpm and 50 mpm or less.
- the thickness gauge used for thickness control is installed at a distance away from the work roll of the rolling mill, and when the rolling speed is reduced, feedback control of the thickness is performed with the measured value of the thickness gauge. Due to the time delay, the plate thickness control accuracy decreases.
- the reversible cold rolling method according to a fourth aspect of the present invention for solving the above-mentioned newly occurring problem is the reversible cold rolling method according to the first to third aspects of the invention, in the joining step, the cold cooling method.
- the inlet side rolling speed and inlet side sheet thickness and outlet side rolling speed of the cold rolling mill are measured, and based on these measured values, the thickness of the cold rolling mill immediately under the work roll is calculated, and the cold rolling mill has It is characterized in that the plate thickness is controlled so as to obtain a desired plate thickness by a hydraulic pressure reducing device.
- the shape detector for measuring the shape of the strip is also arranged at a position away from the work roll of the rolling mill in the same manner as the thickness gauge, so when the rolling speed is reduced, the shape detector is used. It takes time to recognize the shape and correct the shape by the actuator, and the shape control accuracy decreases.
- the coefficient of friction between the work roll and the strip increases, resulting in an increase in rolling load and disorder of the shape.
- the reversible cold rolling method according to a fifth aspect of the present invention for solving the above-mentioned newly occurring problem is the reversible cold rolling method according to any one of the first to fourth aspects of the invention, wherein the joining step In the coil cutting and winding step, the strip shape is controlled by roll bender control or coolant control or both of these controls based on the roll deflection calculation result due to the change in rolling load of the cold rolling mill.
- the reversible cold rolling method according to the sixth invention for solving the second problem described above is the reversible cold rolling method according to any one of the first invention to the fifth invention, wherein the rolling step Before, the order of the coils carried into the unwinding device is adjusted in advance so that the absolute value of the plate thickness difference between the preceding coil and the succeeding coil is 1 mm or less.
- the reversible cold rolling method according to the seventh invention for solving the first problem described above is the reversible cold rolling method according to any one of the first to sixth inventions, wherein the joining step includes The joining device is joined by using a joining device of a mash seam welding system.
- the mash seam welding machine employs a method in which materials to be joined are sandwiched between overlapping electrode wheels and energized to generate heat in the contact resistance and internal resistance of the materials and join them.
- finish of joining increases to about 1.2 to 1.5 times.
- the thickened joint becomes a step, and an excessive force acts on the roll when passing through a rolling mill. Further, the step may be transferred as a mark to the work roll. That is, a problem similar to the second problem occurs.
- the reversible cold rolling method according to the eighth invention for solving the same problem as the second problem newly generated as described above is the reversible cold rolling according to any one of the first invention to the seventh invention.
- a cross swaging process is performed immediately after joining by the mash seam welding type joining device.
- a reversible cold rolling method according to a ninth invention for solving the third problem described above is the reversible cold rolling method according to any one of the first to eighth inventions, wherein the coil buildup is performed.
- the outer diameter of the coil that has been built up is set to ⁇ 3000 or less.
- the reversible cold rolling method according to the tenth invention for solving the third problem described above is the reversible cold rolling method according to any one of the first to ninth inventions, wherein the coil outer diameter is The strip tension at the time of the large diameter is compared with the tension of the strip at the small diameter, and is set to be gradually lower.
- the reversible cold rolling method according to an eleventh aspect of the invention is the reversible cold rolling method according to any one of the first to tenth aspects of the invention, in the rolling step and the coil buildup rolling step. It is characterized by rolling using a 2 stand cold rolling mill as a cold rolling mill.
- the reversible cold rolling method according to the twelfth invention for solving the second problem described above is the reversible cold rolling method according to any one of the first invention to the eleventh invention, wherein the split winding is performed. In the process, the coil is cut in the final pass immediately after the joint passes through the cutting device.
- the reversible cold rolling method according to the thirteenth invention for solving the second problem described above is the reversible cold rolling method according to the twelfth invention, wherein the coil is cut at the final pass in the split winding step. Are immediately before the joining portion passes the cutting device and immediately after the joining portion passes the cutting device.
- a reversible cold rolling method is the reversible cold rolling method according to any one of the first to thirteenth aspects of the present invention, before the rolling of the final pass in the divided winding step.
- the work roll is rearranged into a dull weight work roll in a state in which the strip is passed, and the final pass rolling is performed.
- a reversible cold rolling facility for solving the first problem described above includes an unwinding device for unwinding a coil, at least one reversible cold rolling mill, and the cold rolling mill.
- First and second winding / unwinding devices respectively disposed on the entry side and the exit side of the first path, and a joining device disposed between the unwinding device and the first winding / unwinding device.
- the first coil strip unwound from the unwinding device is directly guided to the cold rolling mill and rolled. And when the first coil tail end reaches the joining device, the second coil tip is continuously unwound from the first coil tail end and the unwinding device.
- the first pass rolling by the cold rolling mill and the joining of the leading coil tail end and the trailing coil leading edge by the joining device are performed, and a plurality of coils are built up into one coil, and the build up is performed in the cold rolling mill.
- the coil is subjected to a predetermined number of reversible rollings until a desired product thickness is obtained, and the built-up coil is divided by a cutting device in the final pass of the reversible rolling, so that the first and second windings are wound.
- the unwinding device, the cold rolling mill, the first and second unwinding / unwinding devices, the joining device, and the cutting device are wound around one of the unwinding devices to form a plurality of coils.
- a control device for controlling is provided.
- a reversible cold rolling facility according to a sixteenth aspect of the present invention that solves a problem newly generated in association with the first problem described above is the reversible cold rolling facility according to the fifteenth aspect of the present invention.
- a strip storage device is disposed between the cold rolling mills.
- a reversible cold rolling facility according to a seventeenth aspect of the present invention that solves a problem newly generated in association with the first problem described above is the reversible cold rolling facility according to the fifteenth and sixteenth aspects of the present invention.
- the strip storage length of the strip storage device is more than 0 m and not more than 100 m.
- a reversible cold rolling facility that solves a problem newly generated in association with the first problem described above is the reversible cold rolling facility according to any one of the fifteenth and thirteenth aspects of the present invention.
- the control device controls the rolling speed of the cold rolling mill during coil joining by the joining device and during coil cutting by the cutting device to be more than 0 mpm and 50 mpm or less. .
- a reversible cold rolling facility that solves a problem newly generated in association with the first problem described above is the reversible cold rolling facility according to any one of the fifteenth aspect to the eighteenth aspect.
- the control device measures the inlet side rolling speed, the inlet side plate thickness, and the outlet side rolling speed of the cold rolling mill during coil joining by the joining device and at the time of coil cutting by the cutting device. Based on these measured values, the thickness of the cold rolling mill is calculated directly below the work roll, and the thickness is controlled by the hydraulic reduction device of the cold rolling mill so as to obtain a desired thickness.
- a reversible cold rolling facility that solves a problem newly generated in association with the first problem described above is the reversible cold rolling facility according to any one of the fifteenth to nineteenth aspects.
- the control device is configured to perform roll bender control or coolant based on a roll deflection calculation result due to a change in rolling load of the cold rolling mill during coil joining by the joining device and at the time of coil division by the cutting device.
- the strip shape is controlled by the control or both of the controls.
- the reversible cold rolling facility according to the twenty-first invention for solving the third problem described above is the reversible cold rolling facility according to any one of the fifteenth to twentieth inventions, wherein the controller is In the first pass coil build-up rolling and during the subsequent reversible rolling, the tension of the strip when the coil outer diameter is large is set lower than the tension of the strip when the coil outer diameter is small.
- a reversible cold rolling facility according to a twenty-second invention is the reversible cold rolling facility according to any one of the fifteenth to twenty-first inventions, wherein the cold rolling mill has two stands.
- a reversible cold rolling facility according to a twenty-third invention for solving the second problem described above is the reversible cold rolling facility according to any one of the fifteenth to twenty-second inventions, wherein the joining device is It is a mash seam welder.
- the reversible cold rolling facility according to the twenty-fourth invention for solving the second problem described above is the reversible cold rolling facility according to the twenty-third invention, wherein the mash seam welder of the joining device A swaging roller having a mechanism for inclining the swaging roller axis with respect to a horizontal plane is provided.
- the joint portion is also smaller than the prior art described in Patent Document 1.
- rolling can be performed at a rolling speed, and production efficiency is improved.
- produces only in the innermost peripheral part and outermost peripheral part of the coil which built up, it becomes possible to reduce an off-gauge rate significantly.
- the portion of the unsteady rolling speed is reduced and the plate thickness accuracy is improved. That is, it is possible to maintain a high efficiency and a high yield as high as those of the prior art described in Patent Document 2.
- the rolling and joining after the second coil are repeated, and the first pass rolling by a cold rolling mill.
- the winding winding for the buildup coil that is essential in the prior art described in Patent Document 2 A dispensing device is not required. Thereby, the equipment configuration can be simplified, and as a result, the initial cost can be reduced.
- a strip storage device is provided between the cold rolling mill and the joining device, the strip is stored in the strip storage device except during joining, and stored in the strip storage device during joining.
- the strip storage length is 100 m or less.
- the length of the strip stored in the strip storage device can be shortened, and the strip storage device can be made compact. As a result, the equipment configuration can be simplified.
- the rolling speed is more than 0 mpm and 20 mpm or less, more preferably more than 0 mpm and 10 mpm or less, more preferably more than 0 mpm and 5 mpm or less, so that the strip storage length is 40 m or less, 20 m or less, respectively.
- the length of the strip stored in the strip storage device can be shortened, and the strip storage device can be made compact. As a result, the equipment configuration can be reduced in size.
- the rolling speed at the time of dividing the coil in the final pass is set to more than 0 mpm and 50 mpm or less, and by applying a collaps reel which will be described later, after the coil is divided, the coil is extracted and carried out.
- the operation of continuously winding the next coil can be performed by one winding / unwinding device, and the solid block type reel winding / unwinding device and the winding for unloading which are essential in the prior art described in Patent Document 2. No take-up device is required. Thereby, the equipment configuration can be simplified, and as a result, the initial cost can be reduced.
- the rolling speed is more than 0 mpm and less than 20 mpm, more preferably more than 0 mpm and less than 10 mpm, more preferably more than 0 mpm and less than 5 mpm, thereby shortening the distance between the cutting device and the winding / unwinding device.
- the equipment length can be shortened. As a result, the initial investment cost can be suppressed.
- the thickness gauge used for thickness control is installed at a distance away from the work roll of the rolling mill, and when the rolling speed is reduced, feedback control of the thickness is performed with the measured value of the thickness gauge. Due to the time delay, the plate thickness control accuracy decreases.
- the inlet side rolling speed, the inlet side plate thickness, and the outlet side rolling speed of the cold rolling mill are measured, and these measurements are performed. Based on the value, the plate thickness just under the work roll of the cold rolling mill is calculated, and the plate thickness control is performed by the hydraulic reduction device of the cold rolling mill so that the desired plate thickness is obtained, so the plate thickness accuracy can be maintained. .
- the shape detector for measuring the shape of the strip is also arranged at a position away from the work roll of the rolling mill in the same manner as the thickness gauge, so when the rolling speed is reduced, the shape detector is used. It takes time to recognize the shape and correct the shape by the actuator, and the shape control accuracy decreases.
- the coefficient of friction between the work roll and the strip increases, resulting in an increase in rolling load and disorder of the shape.
- the roll is calculated based on the roll deflection calculation result due to the rolling load fluctuation of the rolling mill.
- the order of coils to be carried into the unwinding device is adjusted in advance so that the absolute value of the plate thickness difference between the preceding coil and the succeeding coil is 1 mm or less, more preferably 0.5 mm or less in advance. By doing so, it is possible to suppress wrinkles from being transferred to the adjacent coil layer at the level difference of the joint portion located in the inner layer portion of the built-up coil.
- the mash seam welding machine employs a method in which materials to be joined are sandwiched between overlapping electrode wheels and energized to generate heat in the contact resistance and internal resistance of the materials and join them.
- finish of joining increases to about 1.2 to 1.5 times.
- the thickened joint becomes a step, and an excessive force acts on the roll when passing through a rolling mill. Further, the step may be transferred as a mark to the work roll.
- the step can be smoothed by performing a cross swaging process of inclining the swaging roller and rolling the thickened joint after mash seam welding.
- the coil outer diameter of the build-up coil after joining is made to be not more than ⁇ 3000, thereby limiting the tightening force acting on the coil and increasing the coil outer diameter. Increase in size can be suppressed.
- a collaps type reel having an expansion / contraction function can be applied, and the number of winding / unwinding devices can be reduced as described above.
- the tension of the strip when the outer diameter of the coil is large is compared with the tension of the strip when the outer diameter of the coil is small, and the tension is controlled to be gradually lowered.
- the tightening force is limited, and an increase in the size of the winding / unwinding device due to an increase in the outer diameter of the coil can be suppressed.
- a collapsible type reel can be applied, and the number of winding / unwinding devices can be reduced as will be described later.
- the product coil may be required to be more accurate.
- the coil can be divided in the final pass immediately after the bonded portion passes through the cutting device, so that the bonded portion can be disposed on the outer surface of the divided coil, and the bonded portion can be easily processed after the coil is extracted. I can do it.
- the coil is cut in the final pass immediately before the joining portion passes the cutting device and immediately after the joining portion passes the cutting device, so that the joining portion is not wound around the product coil. It is possible to eliminate the need for post-processing.
- the work roll before starting the rolling of the final pass, the work roll is replaced with a dull weight work roll in a state where the strip is passed through, and is performed in a lower process of the cold rolling process in which the final pass is rolled. It is possible to improve the rollability during deep drawing, or the adhesion and clearness of coating.
- FIG. 1 is a schematic view of cold rolled material equipment according to the first embodiment of the present invention.
- the cold rolled material facility includes, as main components, a reversible cold rolling mill 1, an unwinding device 2 for unwinding a strip of a carry-in coil 101, and a cold rolling mill 1.
- Winding / unwinding device 3 first winding / unwinding device
- Winding / unwinding device 4 disposed on the exit side of the first pass of the cold rolling mill 1.
- the reversible cold rolling mill 1 includes, for example, upper and lower work rolls 11 and 11 for directly contacting and rolling a rolled material, upper and lower intermediate rolls 12 and 12 for supporting these work rolls in a vertical direction, and these intermediate rolls.
- This is a 6-stage UC mill provided with upper and lower reinforcing rolls 13 and 13 for supporting 12 and 12 in the vertical direction.
- a hydraulic reduction device 14 is provided below the lower reinforcement roll 13, and the hydraulic reduction device 14 moves the bearing of the lower reinforcement roll 13 up and down based on a command so that a predetermined reduction amount is obtained. Compress the strip.
- a load meter 15 is provided on the upper side of the upper reinforcing roll 13, and the roll reduction amount is adjusted in accordance with the load change detected by the load meter 15. This series of operations is called reduction control.
- a thickness gauge 16a, a plate speed meter 17a, and a shape gauge 18a are provided on the entrance side of the first pass of the cold rolling mill 1, and a thickness gauge 16b is provided on the exit side of the first pass of the cold rolling mill 1.
- a plate speedometer 17b and a shape meter 18b are provided and used for plate thickness control and shape control, and reduction control is performed based on the results of these controls.
- the unwinding device 2 has a collapsible reel having an expansion / contraction function, sets the carry-in coil 101, and unwinds the strip.
- the winding / unwinding device 3 and the winding / unwinding device 4 both have a collaps type reel having an expansion / contraction function, and between the winding / unwinding device 3 and the winding / unwinding device 4, By repeating unwinding, the rolling direction is changed to perform cold rolling of a plurality of passes.
- the joining device 5 joins the strip tail end of the first carry-in coil 101a that has already been unwound and the strip tip end of the second carry-in coil 101b that has been unwound from the unwinding device 2, and subsequently the second
- the build-up coil 102 is formed by joining the strip tail end of the carry-in coil 101b and the strip tip of the third carry-in coil 101c.
- the cutting device 6 a is disposed between the cold rolling mill 1 and the winding / unwinding device 3, and divides the strip of the build-up coil 102 in a path in which the final pass is completed by the winding / unwinding device 3. Further, the cutting device 6b is disposed between the cold rolling mill 1 and the winding / unwinding device 4 and divides the strip of the buildup coil 102 in a path in which the winding / unwinding device 4 completes winding.
- ⁇ Main control> 2 to 4 are control flows showing a processing procedure performed by the control device 20.
- a dotted line indicates a relationship between the devices 1 to 6.
- the control in the case where the build-up coil 102 is formed from the three carry-in coils 101 and four-pass rolling is described.
- FIGS. 5 to 7 are time tables of the devices 1 to 6 corresponding to the control flow, and the same step numbers are assigned to the portions corresponding to the processing steps of the control flow.
- the control device 20 controls the cold rolling mill 1 as follows.
- the strip of the first carry-in coil 101a is passed through (S1101) and further fed out to the winding / unwinding device 4.
- the cold rolling mill 1 is controlled to be reduced (S1102).
- the rolling speed is accelerated to the steady rolling speed, and rolling is performed at the steady rolling speed (S1103).
- the steady rolling speed is the maximum speed at which the ability of the cold rolling mill can be exhibited to the maximum when a desired plate thickness is obtained in each pass.
- the steady rolling speed in the cold reversible rolling equipment is generally in the range of 400 mpm to 1400 mpm.
- the cold rolling mill 1 decelerates and stops rolling in accordance with the procedure in which the strip tail end of the first carry-in coil 101a is unwound from the unwinding device 2 and the second carry-in coil 101b is carried into the unwinding device 2. (S1104).
- the roll is accelerated again to the steady rolling speed, and the cold rolling mill 1 performs rolling at the steady rolling speed on the unrolled strip of the first carry-in coil 101a.
- S1105 Subsequently, the joined second carry-in coil 101b is rolled at a steady rolling speed (S1106).
- the cold rolling mill 1 decelerates and stops rolling (S1107).
- the 2nd carrying-in coil 101b and the 3rd carrying-in coil 101c are joined, it will accelerate to a steady rolling speed again, and the cold rolling mill 1 will roll at the steady rolling speed about the unrolled part of the 2nd carrying-in coil 101b.
- the joined third carry-in coil 101c is rolled at a steady rolling speed (S1109).
- the cold rolling mill 1 decelerates, and the strip tail end of the third carry-in coil 101c is immediately before the cold rolling mill 1.
- the cold rolling mill 1 stops rolling (S1110) and ends the rolling of the first pass (S1111).
- the control device 20 controls the unwinding device 2 as follows.
- the unwinding device 2 unwinds the strip of the first carry-in coil 101a at the plate speed (S1202), and the strip of the first carry-in coil 101a is cold rolled.
- the unwinding device 2 winds the strip of the first carry-in coil 101a in accordance with the rolling speed of the cold rolling mill 1 that performs rolling at a steady rolling speed. (S1203).
- the sheet passing speed is generally a speed of 30 mpm or less.
- the unwinding device 2 When the unwinding device 2 unwinds the tail end of the first carry-in coil 101a and carries in and mounts the second carry-in coil 101b (S1204), the strip of the second carry-in coil 101b is wound up to the joining device 5 at the plate speed. When the strip end of the second carry-in coil 101b is fed to the joining position of the joining device 5 (S1205), the unwinding device 2 stops unwinding (S1206). When the first carry-in coil 101a and the second carry-in coil 101b are joined, the unwinding device 2 adjusts the remaining second carry-in coil 101b in accordance with the rolling speed of the cold rolling mill 1 that performs rolling at the steady rolling speed. The strip is unwound (S1207).
- the unwinding device 2 When the unwinding device 2 unwinds the strip tail end of the second loading coil 101b and loads and mounts the third loading coil 101c (S1208), the strip of the third loading coil 101c is wound to the bonding device 5 at the plate speed.
- the unwinding device 2 stops unwinding (S1210).
- the unwinding device 2 continues the remaining third carry-in coil in accordance with the rolling speed of the cold rolling mill 1 that performs rolling at the steady rolling speed.
- the strip 101c is unwound (S1211).
- the unwinding device 2 stops (S1212).
- the control device 20 controls the winding / unwinding device 4 (second winding / unwinding device) as follows.
- the winding / unwinding device 4 grips the strip end of the first carry-in coil 101a. (S1401).
- the winding / unwinding device 4 winds the strip of the first carry-in coil 101a (S1402), and rolls the strip of the first carry-in coil 101a.
- the winding / unwinding device 4 decelerates and stops winding in accordance with the procedure for stopping (S1403).
- the winding / unwinding device 4 moves the remaining first carry-in coil in accordance with the rolling speed of the cold rolling mill 1 that performs rolling at a steady rolling speed.
- the strip of 101a is wound up (S1404), and then the strip of the second carry-in coil 101b joined is wound up (S1405).
- the winding / unwinding device 4 decelerates and stops winding in accordance with the procedure for stopping the rolling of the strip of the second loading coil 101b when the third loading coil 101c is loaded (S1406).
- the winding / unwinding device 4 When the 2nd carrying-in coil 101b and the 3rd carrying-in coil 101c are joined, according to the rolling speed of the cold rolling mill 1 which performs rolling at a steady rolling speed, the winding / unwinding device 4 has the remaining second carrying-in.
- the strip of the coil 101b is wound up (S1407), and the joined strip of the third carry-in coil is subsequently wound up (S1408).
- the winding / unwinding device 4 stops winding (S1409).
- the buildup coil 102 is formed from the three coils 101a, 101b, and 101c (S1410).
- the outer diameter of the buildup coil 102 is set to ⁇ 3000 or less.
- the control device 20 controls the joining device 5 as follows.
- the joining device 5 has the first carry-in coil 101a and the second carry-in coil.
- 101b is joined (S1501).
- the strip tip of the third carry-in coil 101c is sent out to the joining position of the joining device 5
- the joining device 5 becomes the second carry-in coil.
- 101b and the 3rd carrying-in coil 101c are joined (S1502).
- the winding / unwinding device 3 (first winding / unwinding device) and the cutting devices 6a and 6b are not particularly controlled.
- the control device 20 controls the cold rolling mill 1 as follows. In the first pass, the strip tail end of the build-up coil 102 stopped just before the cold rolling mill 1 is sent to the winding / unwinding device 3 in the direction opposite to the first pass, and the strip end is taken up by the winding / unwinding device 3.
- the cold rolling mill 1 is controlled to be reduced (S2101). When the rolling preparation is completed, the cold rolling mill 1 accelerates to the steady rolling speed in the opposite direction to the first pass, and performs the second pass rolling at the steady rolling speed (S2102).
- the cold rolling mill 1 decelerates and stops (S2103), and the second pass The rolling is finished (S2104). Thereafter, before the rolling of the third pass is started, the cold rolling mill 1 is controlled to be reduced so as to obtain a desired sheet thickness (S3101). When the rolling preparation is completed, the cold rolling mill 1 accelerates to the steady rolling speed in the direction opposite to the second pass, and performs the third pass rolling at the steady rolling speed (S3102).
- the control device 20 controls the winding / unwinding device 3 (first winding / unwinding device) as follows.
- first winding / unwinding device first winding / unwinding device
- the winding / unwinding device 3 is stripped.
- the end is gripped (S2301).
- the winding / unwinding device 3 winds up the strip of the build-up coil 102 (S2302), and decelerates at the end of the second pass rolling. And stop (S2303).
- the winding / unwinding device 3 unwinds the strip of the build-up coil 102 in accordance with the rolling speed of the cold rolling mill 1 that performs rolling at the steady rolling speed (S3301), and matches the end of the third pass rolling. To decelerate and stop (S3302).
- the control device 20 controls the winding / unwinding device 4 (second winding / unwinding device) as follows.
- the winding / unwinding device 4 unwinds the strip of the build-up coil 102 in the reverse direction to the first pass to the winding / unwinding device 3 at a sheet feed speed (S2401).
- the winding / unwinding device 4 unwinds the strip of the build-up coil 102 (S2402), and decelerates at the end of the second pass rolling. It stops (S2403).
- the winding / unwinding device 4 winds the strip of the build-up coil 102 in accordance with the rolling speed of the third pass of the cold rolling mill 1 that performs rolling at the steady rolling speed in the direction opposite to the second pass ( (S3401), it decelerates and stops at the end of rolling in the third pass (S3402).
- the unwinding device 2 In the second to third passes, the unwinding device 2, the joining device 5 and the cutting devices 6a and 6b are not particularly controlled.
- the build-up coil is divided into three carry-out coils 103a to 103c.
- the control device 20 controls the cold rolling mill 1 as follows. After the end of the third pass rolling, before the start of the fourth pass rolling, the cold rolling mill 1 is controlled to obtain a desired plate thickness (S4101). When the preparation for rolling is completed, the cold rolling mill 1 accelerates to the steady rolling speed in the direction opposite to the third pass, and performs rolling in the fourth pass (final pass) at the steady rolling speed (S4102). The cold rolling mill 1 decelerates at a low speed (for example, 10 mpm) in accordance with the procedure in which the strip of the buildup coil 102 is divided by the cutting device 6a and the first carry-out coil 103a is carried out from the winding / unwinding device 3. Rolling is performed (S4103).
- a low speed for example, 10 mpm
- the cold rolling mill 1 again accelerates to the steady rolling speed, and the final pass unrolled strip of the build-up coil 102 at the steady rolling speed. Rolling is performed (S4104), and the cold rolling mill 1 is decelerated in accordance with the procedure in which the strip of the buildup coil 102 is divided by the cutting device 6a and the second unloading coil 103b is unloaded from the winding / unwinding device 3. Rolling is performed at a low speed (for example, 10 mpm) (S4105).
- a low speed for example, 10 mpm
- the cold rolling mill 1 again accelerates to the steady rolling speed, and the final pass unrolled strip of the build-up coil 102 at the steady rolling speed. Rolling is performed (S4106), and the cold rolling mill 1 is decelerated in accordance with the procedure in which the strip of the buildup coil 102 is divided by the cutting device 6a and the third unloading coil 103c is unloaded by the winding / unwinding device 3. Rolling is performed at a low speed (for example, 10 mpm) (S4107).
- the cold rolling mill 1 stops rolling (S4108) and finishes rolling in the fourth pass (final pass) (S4109). ).
- the control device 20 controls the winding / unwinding device 3 (first winding / unwinding device) as follows.
- the winding / unwinding device 3 winds up the strip of the buildup coil 102 (S4301), and has a predetermined length.
- the winding / unwinding device 3 winds the strip of the build-up coil 102 in accordance with the rolling speed of the cold rolling mill 1 that performs rolling at a low speed (for example, 10 mpm) in accordance with the dividing procedure (S4302).
- the winding / unwinding device 3 winds up the remaining strip at a high speed (S4303). After the winding is completed, the winding / unwinding device 3 extracts and unloads the first unloading coil 103a. (S4304). The tip of the strip to be subsequently fed out (tip of the second carry-in coil 103b) is wound up with a belt wrapper (S4305).
- the fourth pass (final pass) of the cold rolling mill 1 that performs rolling at a steady rolling speed is completed.
- the winding / unwinding device 3 winds the strip of the buildup coil 102 in accordance with the rolling speed of the pass) (S4306), and rolls at a low speed (for example, 10 mpm) in accordance with the dividing procedure when winding the strip for a predetermined length.
- the winding / unwinding device 3 winds the strip of the build-up coil 102 (S4307), and after the second unloading coil 103b is cut, the winding / unwinding device 3
- the strip is wound at a high speed (S4308), and after the winding is completed, the winding / unwinding device 3 extracts and unloads the second unloading coil 103b (S4309).
- the tip of the strip to be subsequently fed out (tip of the third carry-in coil 103c) is wound up with a belt wrapper (S4310).
- the fourth pass (final pass) of the cold rolling mill 1 that performs rolling at a steady rolling speed is completed.
- the winding / unwinding device 3 winds up the strip of the build-up coil 102 in accordance with the rolling speed of the pass (S4311), and rolls at a low speed (for example, 10 mpm) in accordance with the dividing procedure when the strip is wound for a predetermined length.
- the strip of the buildup coil 102 is wound up in accordance with the rolling speed of the cold rolling mill 1 to be performed (S4312), and after the third unloading coil 103b is cut, the winding and unwinding device 3 winds up the remaining strip at a high speed ( S4313) After winding is completed, the winding / unwinding device 3 extracts and unloads the third unloading coil 103c (S4314).
- the control device 20 controls the winding / unwinding device 4 (second winding / unwinding device) as follows.
- the winding / unwinding device 4 unwinds the strip of the buildup coil 102 (S4401), and has a predetermined length.
- the winding / unwinding device 4 unwinds the strip of the build-up coil 102 in accordance with the rolling speed of the cold rolling mill 1 that performs rolling at a low speed (for example, 10 mpm) in accordance with the dividing procedure (S4402). ).
- the winding / unwinding device 4 unwinds the strip of the build-up coil 102 in accordance with the rolling speed of the cold rolling mill 1 that performs rolling again at the steady rolling speed (S4403), and when the coil is unrolled for a predetermined length, it is divided.
- the winding / unwinding device 4 unwinds the strip of the build-up coil 102 in accordance with the rolling speed of the cold rolling mill 1 that performs rolling at a low speed (for example, 10 mpm) according to the procedure to be performed (S4404).
- the winding / unwinding device 4 unwinds the strip of the build-up coil 102 in accordance with the rolling speed of the cold rolling mill 1 that performs rolling again at the steady rolling speed (S4405), and divides it when unwinding for a predetermined length.
- the winding / unwinding device 4 unwinds the strip of the build-up coil 102 in accordance with the rolling speed of the cold rolling mill 1 that performs rolling at a low speed (for example, 10 mpm) in accordance with the procedure to be performed (S4406).
- the winding / unwinding device 4 winds the remaining strip, and extracts and unloads the off-gauge coil 103d (S4407).
- the control device 20 controls the cutting device 6a as follows.
- the control device 20 calculates each cutting position from the respective coil outer diameters and reel rotation speeds of the winding / unwinding devices 3 and 4, and the cutting device 6a removes the first carry-out coil 103a from the strip of the buildup coil 102 at the cutting position.
- the second carry-out coil 103b is cut from the remaining strip at the next cutting position (S4602)
- the third carry-out coil 103c is cut from the remaining strip at the next cutting position (S4603).
- the control device 20 calculates the cutting position based on the outer diameter of the coil and the reel rotation speed.
- the cutting position is subjected to drilling or the like, and a cutting position detection device (not shown) detects the cutting position.
- a cutting position detection device detects the cutting position.
- the unwinding device 2 In the fourth pass (final pass), the unwinding device 2, the joining device 5 and the cutting device 6b are not particularly controlled.
- the strip of the first carry-in coil 101a is rolled at the steady rolling speed by the cold rolling mill 1 and unwound from the unwinding device 2 in accordance with the rolling speed of the cold rolling mill 1. It is wound around the winding / unwinding device 4 (S1203 ⁇ S1103 ⁇ S1402).
- the control device 20 commands the rolling speed of the cold rolling mill 1
- the cold rolling mill 1 is feedback controlled so that the command rolling speed is reached.
- the unwinding device 2 is tension feedback controlled so that the strip tension between the unwinding device 2 and the cold rolling mill 1 becomes a predetermined value.
- the winding / unwinding device 4 is also subjected to tension feedback control so that the strip tension between the winding / unwinding device 4 and the cold rolling mill 1 becomes a predetermined value.
- the strip of the second carry-in coil 101b is unwound from the unwinding device 2 at the plate passing speed, and the strip tip is fed to the joining position of the joining device 5. If it is stopped, the strip tail end of the first carry-in coil 101a and the strip tip end of the second carry-in coil 101b are joined by the joining device 5 (S1205 ⁇ S1206 ⁇ S1501).
- the unrolled strip of the first carry-in coil 101a is rolled again at the steady rolling speed by the cold rolling mill 1 and then joined second.
- the strip of the carry-in coil 101 b is rolled at a steady rolling speed by the cold rolling mill 1, and the strip is unwound from the unwinding device 2 in accordance with the rolling speed of the cold rolling mill 1 and taken up by the winding unwinding device 4.
- the strip of the third carry-in coil 101c is unwound from the unwinding device 2 at the plate passing speed, and the strip tip is fed to the joining position of the joining device 5. Then, the joining device 5 joins the strip tail end of the second carry-in coil 101b and the strip tip of the third carry-in coil 101c (S1209 ⁇ S1210 ⁇ S1502).
- the unrolled strip of the second carry-in coil 101b is rolled again at the steady rolling speed by the cold rolling mill 1 and then joined together.
- the strip of the carry-in coil 101 b is rolled at a steady rolling speed by the cold rolling mill 1, and the strip is unwound from the unwinding device 2 in accordance with the rolling speed of the cold rolling mill 1 and taken up by the winding unwinding device 4.
- the unwinding device 2 stops, and when the strip tail end of the third carry-in coil 101c reaches just before the cold rolling mill 1, the cold rolling mill 1 stops and the second 1 pass is complete
- the buildup coil 102 is formed in the winding / unwinding device 4 (S1410).
- the strip of the build-up coil 102 is unwound from the winding / unwinding device 4 at the plate passing speed, and the tail end of the strip is gripped by the winding / unwinding device 3 and further wound several times. Thereafter, the cold rolling mill 1 is subjected to reduction control (S2401 ⁇ S2301 ⁇ S2101).
- the strip of the build-up coil 102 is rolled at the steady rolling speed by the cold rolling mill 1 and is unwound from the winding / unwinding device 4 in accordance with the rolling speed of the cold rolling mill 1. Then, it is wound up by the winding and unwinding device 3 (S2402 ⁇ S2102 ⁇ S2302).
- the cold rolling mill 1 stops and finishes the second pass, and when the cold rolling mill 1 stops, the winding unwinding device 3 and the winding unwinding
- the apparatus 4 stops (S2103 ⁇ S2403 ⁇ S2303 ⁇ S2104).
- the rolling direction is switched to the reverse direction and the third pass is started.
- the cold rolling mill 1 is controlled to be reduced, and the strip of the buildup coil 102 is controlled by the cold rolling mill 1.
- Rolled at a steady rolling speed unwound from the winding / unwinding device 3 in accordance with the rolling speed of the cold rolling mill 1, and wound on the winding / unwinding device 4 (S3101 ⁇ S3102 ⁇ S3301 ⁇ S3401).
- the cold rolling mill 1 stops and finishes the third pass.
- the winding unwinding device 3 and the winding unwinding The apparatus 4 stops (S3103 ⁇ S3302 ⁇ S3402 ⁇ S3104).
- the cold rolling mill 1 is controlled to be reduced, and the strip of the buildup coil 102 is controlled by the cold rolling mill 1.
- Rolled at a steady rolling speed, unwound from the winding / unwinding device 4 in accordance with the rolling speed of the cold rolling mill 1 and wound on the winding / unwinding device 3 (S4101 ⁇ S4102 ⁇ S4301 ⁇ S4401).
- the cold rolling mill 1 is decelerated to a predetermined low speed, and the strip of the build-up coil 102 is slowed down by the cold rolling mill 1. It is rolled at (for example, 10 mpm), unwound from the winding / unwinding device 4 in accordance with the rolling speed of the cold rolling mill 1, and wound up by the winding / unwinding device 3 (S4103 ⁇ S4302 ⁇ S4402).
- the strip of the build-up coil 102 is cut by the cutting device 6a at the strip cutting position, and the remaining strip of the cut-out first carry-out coil 103a is wound up. It is wound around the unwinding device 3 at a high speed.
- the winding / unwinding device 3 stops, and the first carry-out coil 103a is extracted from the winding / unwinding device 3 and carried out (S4601 ⁇ S4303 ⁇ S4304). Note that a collapsible reel is applied to the winding / unwinding device 3 as described above.
- the remaining strip of the divided buildup coil 102 is rolled at a low speed by the cold rolling mill 1 and wound in accordance with the rolling speed of the cold rolling mill 1. Unwinding is performed from the unwinding device 4.
- the tip of the fed strip (corresponding to the second carry-in coil 103b) is wound up by the belt wrapper of the winding / unwinding device 3 (S4305).
- the remaining strip of the build-up coil 102 is rolled at a steady rolling speed by the cold rolling mill 1 and wound in accordance with the rolling speed of the cold rolling mill 1.
- the material is unwound from the unwinding device 4 and wound on the unwinding / unwinding device 3 (S4104 ⁇ S4306 ⁇ S4403).
- the cold rolling mill 1 is decelerated to a predetermined low speed, and the strip of the build-up coil 102 is slowed down by the cold rolling mill 1. Is rolled out from the winding / unwinding device 4 in accordance with the rolling speed of the cold rolling mill 1 and wound into the winding / unwinding device 3 (S4105 ⁇ S4307 ⁇ S4404).
- the strip of the build-up coil 102 is divided by the cutting device 6a at the strip cutting position, and the remaining strip of the divided second carry-out coil 103b is wound up. It is wound around the unwinding device 3 at a high speed.
- the winding / unwinding device 3 stops, and the second unloading coil 103b is extracted from the winding / unwinding device 3 and is unloaded (S4602 ⁇ S4308 ⁇ S4309).
- the remaining strip of the divided buildup coil 102 is rolled at a low speed by the cold rolling mill 1 and wound in accordance with the rolling speed of the cold rolling mill 1. Unwinding is performed from the unwinding device 4.
- the tip of the fed strip (corresponding to the third carry-in coil 103c) is wound up by the belt wrapper of the winding / unwinding device 3 (S4310).
- the remaining strip of the build-up coil 102 is rolled at a steady rolling speed by the cold rolling mill 1 and wound in accordance with the rolling speed of the cold rolling mill 1.
- the material is unwound from the unwinding device 4 and wound on the unwinding / unwinding device 3 (S4106 ⁇ S4311 ⁇ S4405).
- the cold rolling mill 1 is decelerated to a predetermined low speed, and the strip of the build-up coil 102 is slowed down by the cold rolling mill 1. Is rolled from the winding / unwinding device 4 in accordance with the rolling speed of the cold rolling mill 1 and wound on the winding / unwinding device 3 (S4107 ⁇ S4312 ⁇ S4406).
- the strip of the build-up coil 102 is divided by the cutting device 6a at the strip cutting position, and the remaining strip of the third third discharging coil 103c is wound up. It is wound around the unwinding device 3 at a high speed.
- the winding / unwinding device 3 stops, and the third unloading coil 103c is extracted from the winding / unwinding device 3 and unloaded (S4603 ⁇ S4313 ⁇ S4314).
- the cold rolling mill 1 stops rolling and finishes the fourth pass, and the remaining strip of the divided build-up coil 102 is taken up by the winding / unwinding device 4.
- the wound off-gauge coil 103d is extracted from the winding / unwinding device 4 and carried out (S4108 ⁇ S4109 ⁇ S4407). As described above, a collapsible reel is applied to the winding / unwinding device 4.
- the unloading coils 103a to 103c are unloaded from the winding / unwinding device 3, and the off-gauge coil 103d is unloaded from the winding / unwinding device 4.
- the strip of the build-up coil 102 is cut by the cutting device 6b, the carry-out coils 103a to 103c are extracted from the take-up / winding device 4 and carried out, and the off-gauge coil 103d is taken up. It is unloaded from the unwinding device 3.
- FIG. 8 is a schematic diagram of cold rolled material equipment according to the first prior art. The same components as those in FIG. 1 are denoted by the same reference numerals.
- the cold rolled material facility (RCM facility) according to the first prior art mainly includes a reversible cold rolling mill 1 and a strip for the cold rolling mill 1 in the first pass.
- a control device 20 for controlling the device 4, the cold rolling mill 1, the unwinding device 2, and the winding / unwinding devices 3 and 4 is provided.
- the carry-in coil 101a is carried into the unwinding device 2, the strip tip is threaded, gripped by the unwinding / unwinding device 4, and further wound by several turns, and after preparation for rolling such as tension application and reduction is completed,
- the cold rolling mill 1 starts the first pass rolling. When the strip tail end comes just before the cold rolling mill 1, the first pass rolling is finished.
- the strip tip is passed in the direction opposite to the first pass, the strip tip is gripped by the winding / unwinding device 3, and further wound by several turns, after completion of preparation for rolling such as tension application and reduction,
- the cold rolling mill 1 starts the second pass rolling.
- the second pass rolling is completed in a state where the winding and unwinding device 3 grips several strip ends.
- rolling of the third pass is started by the cold rolling mill 1.
- the third pass rolling is finished in a state where the winding and unwinding device 4 grips several strip ends.
- rolling of the fourth pass is started by the cold rolling mill 1.
- the unloading coil 103a after rolling in the fourth pass is taken up by the winding / unwinding device 3, extracted, and unloaded.
- the carry-in coil 101b is carried into the unwinding device 2
- the carry-out coil 103b is carried out from the winding / unwinding device
- the carrying-in coil 101c is carried into the unwinding device 2
- the carry-out coil 103c is carried out into the winding / unwinding device 3. It is carried out from.
- FIG. 9 is a schematic view of a cold rolled material facility according to the second prior art.
- the same components as those in FIG. 1 are denoted by the same reference numerals.
- the cold rolled material facility mainly includes a reversible cold rolling mill 1, an unwinding device 2 for unwinding the strip of the carry-in coil 101, and a cold rolling mill.
- Winding / unwinding device 3A first winding / unwinding device
- Winding / unwinding device disposed on the exit side of the first pass of the cold rolling mill 1 4A second winding / unwinding device
- a joining device 5 for forming the build-up coil 102 from the plurality of carry-in coils 101
- a cutting device 6 for dividing the strip of the build-up coil 102 to form the carry-out coil 103.
- the control apparatus 20 which controls is provided.
- a solid reel is applied to the winding / unwinding devices 3A and 4A and the buildup coil winding / unwinding device 111, and a collapsible reel is applied to the winding device 2 and the winding devices 112 and 113. .
- the carry-in coil 101a is carried into the unwinding device 2 and unwound, and the end of the strip is gripped and taken up by the build-up coil take-up and unwinding device 111.
- the carry-in coil 101b is carried into the unwinding device 2 and unwound until the strip tip is sent out to the joining position of the joining device 5, Then, the joining device 5 joins the strip tail end of the first carry-in coil 101a and the strip tip of the second carry-in coil 101b.
- the joined strip is taken up by the build-up coil take-up and unwinding device 111.
- the strip tail end of the second carry-in coil 101b and the strip tip end of the third carry-in coil 101c are joined by the joining device 5, and the joined strip is taken up by the build-up coil winding / unwinding device 111,
- the buildup coil 102 is formed in the buildup coil winding / unwinding device 111.
- the strip of the buildup coil 102 is unwound from the winding / unwinding device 111 for buildup coil, passed through, gripped by the winding / unwinding device 4A, and after the reduction control, the cold rolling machine 1 performs the first pass. Rolling is performed. Thereafter, the strip is subjected to reversible rolling in the second to third passes between the winding / unwinding device 3A and the winding / unwinding device 4A.
- the grip of the winding / unwinding device 3 is released, and the strip end is unwound from the winding / unwinding device 3.
- the unwinding strip end is gripped by the winding device 112, and after the reduction control, the fourth pass rolling is performed.
- a strip having a predetermined length corresponding to the carry-out coil 103a is taken up by the winding device 112
- the strip of the build-up coil 102 is cut by the cutting device 6a at the strip cutting position, and the cut-out carry coil 103a is taken up by the winding device 112. It is extracted from and taken out.
- the remaining strip is also divided by the cutting device 6a, and the divided carry-out coils 103b and 103c are sequentially extracted from the winding device 112 and carried out. Note that a collapsible reel is applied to the winding / unwinding device 112 as described above.
- the cutting device 6b is arrange
- the off-gauge rate can be greatly reduced.
- the actual rolling time in the operation time becomes longer, and the production efficiency is improved as compared with the first prior art.
- the cold rolled material facility according to the second prior art is assumed to be a relatively large-scale production facility with an annual production of 800,000 tons or more. Yes.
- the cold-rolled material facility according to the second prior art has a joining device 5, a cutting device 6, a build-up coil winding / unwinding device 111, and a winding device.
- the configuration of 112 and 113 is increased, and the initial cost is increased.
- the winding and unwinding devices 3A and 4A and the build-up coil winding and unwinding device 111 are increased in size. Cost increases.
- winding devices 112 and 113 to which a collapsible reel is applied are separately required.
- the cold-rolled material equipment related to the second conventional technology assumes a relatively large-scale production facility with an annual production of 800,000 tons or more, and prioritizes lowering the off-gauge rate and improving production efficiency. A little bulky does not matter. However, if the cold rolled material facility related to the second conventional technology is applied to small- to medium-scale production facilities with annual production of about 300,000 tons to 600,000 tons, the problem of initial cost becomes significant and cost-effective. There was a problem in terms of.
- the effect of this embodiment will be described by comparing it with the first prior art.
- two passes and four reversible rollings are performed. That is, by forming the build-up coil 102 in the first pass and performing the reversible rolling of the build-up coil 102 after the second pass, the joint can also be rolled at the normal rolling speed, compared to the first prior art. Production efficiency is improved. Further, since the unrolled portion is generated only at the strip tip of the carry-out coil 103a and the strip tail end of the carry-out coil 103c, the off-rolled portion can be greatly reduced. Furthermore, the portion of the unsteady rolling speed is reduced and the plate thickness accuracy is improved. That is, it is possible to maintain a high efficiency and a high yield as high as those of the second conventional technique.
- the winding devices 112 and 113 which are essential in the second prior art, are not necessary, and the increase in the size of the winding and unwinding devices 3 and 4 can be suppressed, thereby simplifying the equipment configuration. As a result, the initial cost can be further reduced.
- a mash seam welding type joining device is used as the joining device 5.
- the first carry-in coil 101a and the second carry-in coil 101b having a uniform thickness are joined, and the second carry-in coil 101b and the third carry-in coil 101c having a uniform thickness are joined to each other. It is assumed that there is no change in thickness of 102. However, in reality, the plate thickness may differ between the carry-in coils 101a to 101c due to an error, and a step is generated at the joint. The joint is located in the inner layer of the build-up coil 102. When tension is applied to the coil in this state, the step in the joint is transferred to the inside and outside of each layer, resulting in a product defect that is handled as a flaw. .
- the first carry-in coil 101a A step of 1.2 mm occurs at the joint with the second carry-in coil 101b.
- the process computer 21 (see FIG. 1), which is the host computer of the control device 20, manages the plate thickness of each carry-in coil 101, for example, carries in the second carry-in coil 101b and the third carry-in coil 101c. Control is performed to change the order. After the replacement, the step at the joint between the first carry-in coil 101a and the second carry-in coil 101b is 0.6 mm, and the step at the joint between the second carry-in coil 101b and the third carry-in coil 101c is 0.6 mm.
- the absolute value of the plate thickness difference is 1 mm or less, the level difference of the joint portion located in the inner layer portion of the built-up coil Transfer of wrinkles to adjacent coil layers can be suppressed. Furthermore, it is more preferable that the absolute value of the plate thickness difference is 0.5 mm or less.
- a mash seam welding type joining device is used as the joining device 5 in order to reduce the initial cost.
- FIG. 10 is a conceptual diagram of the mash seam welding method.
- the mash seam welder adopts a method in which the material to be joined is sandwiched between overlapping electrode wheels and energized to generate heat in the contact resistance and internal resistance of the material, and a melted and solidified part called nugget N is generated and joined. It is.
- finish of joining increases to about 1.2 to 1.5 times.
- the thickened joint becomes a step, and an excessive force acts on the roll when passing through the rolling mill 1. Further, the step may be transferred as a mark to the work roll.
- step difference of a junction part may transcribe
- the joining device 5 performs a cross swaging process of inclining the swaging roller and rolling the thickened joint after mash seam welding. Thereby, a level
- step difference can be smoothed and the subject concerning a junction part can be solved.
- the configuration and operation of the bonding apparatus 5 will be described.
- FIG. 11 is a schematic view of the joining device 5.
- the joining device 5 includes a pair of upper and lower electrode wheels 51 and 52, a pair of upper and lower pressure rollers 53 and 54, inlet and outlet clamping devices 55 and 56, a carriage frame 57, an electrode wheel pressing device 58 and a pressure roller pressing device. 59.
- the upper electrode wheel 51 and the upper pressure roller 53 are supported on the upper horizontal frame of the carriage frame 57 via the electrode wheel pressing device 58 and the pressure roller pressing device 59, respectively.
- the lower electrode wheel 52 and the lower pressure roller 54 are respectively It is supported on the lower horizontal frame of the carriage frame 57 via a mounting block.
- the pair of upper and lower pressure rollers 53 and 54 are disposed in the carriage frame 57 adjacent to the pair of upper and lower electrode wheels 51 and 52.
- both ends of the strip are overlapped, and in this state, the strip is gripped by the clamping members of the entry side and exit side clamping devices 55 and 56 to fix the position.
- the carriage frame 57 is moved in the welding direction by the driving device, so that the pair of upper and lower electrode wheels 51 and 52 and the pair of upper and lower pressure rollers 53 and 54 supported by the carriage frame 57 are relative to the strip. It is moved and bonding and pressurization are carried out continuously.
- the overlapping portion of the strip is sandwiched between a pair of upper and lower electrode wheels 51, 52, the electrode wheels 51, 52 are pressed against the overlapping portion of the strip by the electrode wheel pressing device 58, and the electrode wheels 51, 52 are pressed by the electric motor.
- a welding current is passed through the electrode wheels 51 and 52 to cause resistance heating and welding (mash seam welding).
- the joint (welded portion) J is sandwiched between the pair of upper and lower pressure rollers 53 and 54, and the pressure rollers 53 and 54 are pressed by the pressure roller pressing device 59. Is pressed against the joining portion, and the pressure roller 53, 54 is actively driven to rotate by an electric motor, and the joining portion of the strip is pressed and rolled.
- the pressure roller pressing device 59 is provided with a tilt mechanism 60 for adjusting the tilt angles of the shaft cores 61 and 62 of the pressure rollers 53 and 54.
- a tilt mechanism 60 for adjusting the tilt angles of the shaft cores 61 and 62 of the pressure rollers 53 and 54.
- illustration of the electric motor, the chain, and the sprocket mechanism that rotationally drive the pressure roller is omitted.
- FIG. 12 is a schematic view of the tilt mechanism 60.
- the tilt angle of the axis of the pressure roller 53 can be set to an arbitrary angle in the horizontal plane.
- a rotation shaft 71 rotatably inserted into the upper horizontal frame of the carriage frame 56 and an electric motor 74 that rotationally drives the rotation shaft 71 through pinions 72 and 73 are provided.
- the electric motor 74 is an inclination angle control device 75.
- Controlled by The tilt mechanism 60 includes an angle sensor 76 for detecting the tilt angle of the pressure roller 53, and the tilt angle control device 75 receives angle information from the host control device 77 according to the thickness of the strip before the start of joining.
- the electric motor 74 is driven and controlled using the signal of the angle sensor 76 so that the inclination angle of the pressure roller 53 matches the set angle.
- FIG. 16 is a diagram showing a metal flow within the contact length when the joints J are rolled while the shaft cores 61 and 62 of the pressure rollers 53 and 54 are inclined.
- the upper pressure roller 53 Shows the case.
- A is an arrow indicating the traveling direction (rolling direction) of the pressure roller 53
- X is a straight line that virtually indicates the weld line (joining line) of the joint J on the traveling direction A
- Y Is a straight line orthogonal to the weld line X.
- 63 is a straight line passing through the central portion in the width direction of the pressure roller 53 in the direction perpendicular to the axis, and ⁇ is the inclination angle of the pressure roller 53 (the straight line in the direction perpendicular to the axis of the welding line X and the upper pressure roller 53). 63).
- 64 is a contact length portion where the pressure roller 53 contacts the joint J
- R is a speed vector of the pressure roller 53 in the contact length portion 64
- R1 is a welding line X of the speed vector R.
- R2 is a component in the direction perpendicular to the weld line X of the velocity vector R.
- Metal flow in the direction of the velocity vector component R2 (perpendicular to the weld line X), that is, plastic flow in the direction perpendicular to the weld line X due to shear deformation by the shear force 82 occurs.
- the step S of the joint J can be smoothed by shear deformation or plastic flow perpendicular to the weld line X.
- the direction of the angle ⁇ for tilting the pair of upper and lower pressure rollers 53 and 54 can be set in two types.
- the traveling direction portions 53A and 54A of the pair of pressure rollers 53 and 54 are in a horizontal plane, and the first contact of the pressure rollers 53 and 54 with the first press roller 53, 54 is performed.
- the shaft cores 61 and 62 of the pair of pressure rollers 53 and 54 are inclined with respect to the straight line Y orthogonal to the welding line X so as to face the direction opposite to the existing direction.
- the pressure roller located on the thick side (the material portion of the joint J where the pressure rollers 53 and 54 first contact) starting from the step S of the joint J among the joint J of the strip.
- the shaft cores 61 and 62 of the pressure rollers 53 and 54 are inclined so that the shaft ends of 53 and 54 face the rolling direction A of the joint J.
- a shearing force 82 corresponding to the velocity vector component R2 acts in the direction in which the strip is first contacted by the pressure rollers 53 and 54 from the step S of the joint J of the strip, and the welding line in the same direction.
- the step portion is rolled and smoothed while applying shear deformation in a perpendicular direction.
- a force in a direction opposite to the shearing force 82 acts as a thrust force 81 from the joint J to the pressure rollers 53 and 54.
- the reaction force of the thrust force 81 acts on the joint J as the shear force 82.
- the second setting method is to incline the pressure rollers 53 and 54 in the opposite direction as compared with the first setting method. That is, the pair of pressure rollers 3 and 54 are arranged so that the traveling direction portions 53A and 54A of the pair of pressure rollers 53 and 54 are in the horizontal plane and face the direction in which the strip with which the pressure rollers 53 and 54 first contact is present. In this case, the four shaft cores 61 and 62 are inclined with respect to the straight line Y orthogonal to the welding line X.
- the side having a small thickness starting from the step S of the joint portion J (the material portion of the joint portion J to which the pressure rollers 53 and 54 do not contact first).
- the shaft cores 61 and 62 of the pressure rollers 53 and 54 are inclined so that the shaft ends of the pressure rollers 53 and 54 positioned at the position of the pressure rollers 53 and 54 face the rolling direction A of the joint J.
- the shearing force 82 corresponding to the velocity vector component R2 is applied in the direction opposite to the direction in which the strip is associated with the metal material first contacted by the pressure rollers 53 and 54 from the step S of the joint J of the strip.
- the step portion is rolled and smoothed while applying shear deformation in the direction perpendicular to the weld line in the same direction. Also at this time, the force in the direction opposite to the shearing force 82 acts as the thrust force 81 from the joint J to the pressure rollers 53 and 54.
- the first setting method is adopted.
- the reason is as follows. Even if the pair of upper and lower pressure rollers 53 and 54 are inclined by the second setting method, the step S can be plasticized by the shear force 82 and smoothed. However, in this case, as shown in FIG. 15B, a step of the step S is folded into the base material, and a new problem occurs in which the step S is buried in the base material in a crack shape. There is no problem when it is applied to a site where the surface property of the joint J is simply required and the strength is not required, but when applied to a site where stress acts, it is press-molded like a tailored blank. In such plastic working applications, the tip of the buried step becomes a singular stress field, which causes damage.
- the direction in which the pressure rollers 53 and 54 are inclined is preferably set such that the traveling direction portions 53A and 54A of the pair of pressure rollers 53 and 54 are in a horizontal plane, as shown in FIGS. 14A and 14B.
- , 54 are inclined with respect to a straight line Y perpendicular to the welding line X so that the axial cores 61, 62 of the pair of pressure rollers 53, 54 are directed in a direction opposite to the direction in which the first contact strip exists.
- the step difference can be smoothed without burying the step S in a crack in the base material, and the quality of the joint is improved.
- the outer diameter of the build-up coil 102 is ⁇ 3000 or less. Further, the strip tension when the outer diameter of the buildup coil 102 is large is set to be gradually lower than that when the outer diameter is small.
- FIG. 16 is a diagram illustrating tension control during winding of the buildup coil 102. When the outer diameter of the buildup coil 102 is less than ⁇ 1500, a constant predetermined value of tension is applied. However, when the outer diameter of the buildup coil 102 exceeds ⁇ 1500, the outer diameter is set to gradually decrease. ing.
- the winding / unwinding devices 3A and 4A of the second prior art need to apply solid block type reels, but the winding / unwinding devices 3 and 4 of the present embodiment apply a collapsed reel. Can do.
- the cutting devices 6a and 6b have a swing mechanism (not shown).
- Cutting equipment in cold tandem rolling mills with an annual production of 1 million tons or more generally divides the coil between runs while continuing rolling. I was taking it.
- the speed at the time of coil cutting is reduced only to about 100 mpm to 300 mpm, so that the cutting device that cuts the coil between runs while continuing the conventional rolling is inexpensive.
- the initial cost increases when a conventional cutting device is used in a small- to medium-sized production facility having an annual production amount of about 300,000 tons to 600,000 tons.
- the rolling speed when dividing the buildup coil 102 is set to a low speed (for example, 10 mpm). Therefore, a cutting device having a relatively inexpensive rocking mechanism can be applied instead of the conventional expensive inter-running cutting device, and the initial cost can be reduced.
- the cutting device 6a having a rocking mechanism can cut the strip without stopping rolling as described in the operation of the fourth pass.
- the rolling speed when the buildup coil 102 is divided by the cutting device 6a is set to a low speed (for example, 10 mpm). While being rolled at low speed by the cold rolling mill 1, the carry-out coil 103 is divided by the cutting device 6 a, wound at the high-speed winding / unwinding device 3, and then extracted and carried out. It is assumed that this series of operations is performed in about 30 seconds, for example.
- the distance from the cutting position of the cutting device 6a to the winding / unwinding device 3 is assumed to be 5 m, and the build-up coil 102 strip tip after the division is cooled from the cutting position of the cutting device 6a to the winding / unwinding device 3.
- the arrival time is 30 seconds. That is, the first carry-out coil 103a is carried out before preparation for winding the second carry-in coil 103b.
- the carrying-out coil 103 is extracted and carried out, and then the next carrying-out coil 103 is continuously wound up.
- the work can be performed by one winding / unwinding device 3, and the solid block type reel winding / unwinding device 3A and the winding device 112 which are essential in the second prior art are not required.
- the winding / unwinding device 4A and the winding device 113 are not necessary.
- the stop mark since rolling stops when dividing, the friction coefficient between the work roll and the strip changes on the surface of the strip sandwiched between the work rolls, so that a stop mark is formed and the work roll.
- the stop mark since the stop mark is transferred, the stop mark may be transferred to the surface of the strip at regular intervals at the rotation pitch of the work roll during subsequent rolling. If this stop mark occurs in the final pass, the quality of the surface gloss is impaired, and a material with strict quality has a problem of becoming a defective product.
- the product coil may be required to be more accurate.
- the coil division in the final pass is immediately after the joint passes through the cutting device. That is, the cutting position is immediately after the joint.
- the cutting position is calculated by the control device 20 from the coil outer diameter and the reel rotation speed of each of the winding / unwinding devices 3 and 4.
- the joint portion can be arranged on the outer surface of the carry-out coil 103, and the joint portion can be easily processed after the carry-out coil 103 is extracted.
- the coil division in the final pass may be performed immediately before the joining portion passes the cutting device and immediately after the joining portion passes the cutting device. That is, the joint is cut off from the carry-out coil 103 by the cutting device 6a.
- the joint is not wound around the carry-out coil 103, and post-processing of the joint can be made unnecessary.
- the work roll may be replaced with a dull weight work roll in a state where the strip is passed, and the final pass rolling may be performed.
- FIG. 17 is a schematic view of a cold rolled material facility according to the second embodiment of the present invention. While the cold rolling mill 1 of the first embodiment has one stand, the cold rolling mills 1a and 1b of the second embodiment have two stands.
- the cold rolling mill 1 of the first embodiment is set to one stand.
- the number of stand is set to two stands. Is preferred.
- 2 stands are preferable in terms of the cost effectiveness.
- Other configurations are the same as those in the first embodiment, and the control and operation are also the same, and the same effects can be obtained.
- FIG. 18 is a schematic view of a cold-rolled material facility according to the third embodiment of the present invention.
- the cold rolled material facility according to the present embodiment includes a strip storage device 9 disposed between the joining device 5 and the cold rolling mill 1 in addition to the configuration of the cold rolled material facility according to the first embodiment. Yes.
- the strip storage device 9 has a movable roller 92 provided between the two fixed rollers 91 a and 91 b, and the drive device (not shown) stores the strip by lowering the movable roller 92. To release the stored strip.
- the operation of the strip storage device 9 is controlled by the control device 20.
- FIG. 19 is a control flow showing a processing procedure performed by the control device 20.
- the control in the second to fourth passes is the same as the control in the first embodiment, and only the control in the first pass is shown.
- the control device 20 controls the cold rolling mill 1 so as to stop in accordance with the procedure for carrying in and joining the carry-in coil 101 (S1104, S1107).
- the control device 20 controls the cold rolling mill 1 to perform rolling at a low speed (for example, 10 mpm) in accordance with the procedures for carrying in and joining the carry-in coil 101 (for example, 10 mpm).
- a low speed for example, 10 mpm
- the control device 20 controls the winding / unwinding device 4 to stop in accordance with the stop of the cold rolling mill 1 (S1403, S1406).
- the control device 20 controls the winding / unwinding device 4 to wind at a low speed in accordance with the low speed rolling of the cold rolling mill 1 (S1403B, S1406B).
- the control device 20 controls the strip storage device 9 as follows.
- the movable roller 92 is lowered and the strip storage device 9 starts storing the strip.
- the lowering of the movable roller 92 is stopped (S1901B).
- the movable roller 92 is raised, The strip storage device 9 gradually releases the storage of the strip, and when the first carry-in coil 101a and the second carry-in coil 101b are joined, the rising of the movable roller 92 is stopped (S1901B). Thereafter, the movable roller 92 is lowered again, and the strip storage device 9 starts storing the strip. When the strip of a predetermined length is stored, the downward movement of the movable roller 92 is stopped (S1903B).
- the control relating to the unwinding device 2 and the joining device 5 is substantially the same as the control of the first embodiment.
- the second carry-in coil 101b is carried into the unwinding device 2, and a series of the strip tail end of the first carry-in coil 101a and the strip tip end of the second carry-in coil 101b are joined.
- the cold rolling mill 1 is stopped (S1104), but the cold rolled material facility according to this embodiment operates as follows.
- the strip storage device 9 stores the strip (S1201 ⁇ S1202 ⁇ S1901B). After that, the strip of the first carry-in coil 101a is rolled and unwound at a steady rolling speed (S1203 ⁇ S1103 ⁇ S1402), and when the strip tail reaches the joining position of the joining device 5 and stops, the strip storage device 9 At the same time as the strip is released, the unrolled strip of the first carry-in coil 101a is rolled at a low speed (for example, 10 mpm) by the cold rolling mill 1 and wound and unwound in accordance with the rolling speed of the cold rolling mill 1. It is wound around the device 4 (S1902B ⁇ S1104B ⁇ S1403B).
- the second carry-in coil 101b is carried into, attached to, and sent out from the unwinding device 2, and the strip tail end of the first carry-in coil 101a and the strip tip of the second carry-in coil 101b are joined by the joining device 5.
- the joining device 5 Are joined (S1204 ⁇ S1205 ⁇ S1206 ⁇ S1501).
- the strip storage device 9 needs to store 20m strips.
- the unrolled strip of the first carry-in coil 101a is rolled again at the steady rolling speed by the cold rolling mill 1 and then joined second.
- the strip of the carry-in coil 101 b is rolled at a steady rolling speed by the cold rolling mill 1, and the strip is unwound from the unwinding device 2 in accordance with the rolling speed of the cold rolling mill 1 and taken up by the winding unwinding device 4.
- a new strip is stored in the strip storage device 9 (S1105 ⁇ 1404 ⁇ S1207 ⁇ S1106 ⁇ S1405 ⁇ S1903B).
- the strip of the second carry-in coil 101b When the strip of the second carry-in coil 101b is unwound and the tail end of the strip reaches the joining position of the joining device 5 and stops, the strip is discharged from the strip storage device 9, and at the same time, the second carry-in coil 101b is not rolled.
- the strip is rolled at a low speed by the cold rolling mill 1 and wound on the winding / unwinding device 4 in accordance with the rolling speed of the cold rolling mill 1 (S1904B ⁇ S1107B ⁇ S1406B).
- the third carry-in coil 101c is carried into, attached to, and sent out from the unwinding device 2, and the strip tail end of the second carry-in coil 101b and the strip tip of the third carry-in coil 101c are joined by the joining device 5.
- the joining device 5 Are joined (S1208 ⁇ S1209 ⁇ S1210 ⁇ S1502).
- the unrolled strip of the second carry-in coil 101b is again rolled at the steady rolling speed by the cold rolling mill 1, and subsequently joined to the third
- the strip of the carry-in coil 101 c is rolled at a steady rolling speed by the cold rolling mill 1, and the strip is unwound from the unwinding device 2 in accordance with the rolling speed of the cold rolling mill 1 and taken up by the winding unwinding device 4.
- the unwinding device 2 stops, and when the strip tail end of the third carry-in coil 101c reaches just before the cold rolling mill 1, the cold rolling mill 1 stops and the second 1 pass is complete
- the buildup coil 102 is formed in the winding / unwinding device 4 (S1410).
- the second carry-in coil 101b in the first pass, is carried into the unwinding device 2, and a series of the strip tail end of the first carry-in coil 101a and the strip tip end of the second carry-in coil 101b are joined.
- the cold rolling mill 1 is stopped (S1104).
- the series of operations S1208 ⁇ S1209 ⁇ S1210 ⁇ S1502 in which the third carry-in coil 101c is carried in and the strip tail end of the second carry-in coil 101b and the strip tip of the second carry-in coil 101c are joined.
- the rolling mill 1 is stopped (S1108).
- a stop mark is generated by changing the friction coefficient between the work roll and the strip on the surface of the strip sandwiched between the work rolls. Furthermore, since the stop mark is also transferred to the work roll, the stop mark may be transferred to the surface of the strip at regular intervals at the rotation pitch of the work roll during subsequent rolling. When this stop mark is generated in the first pass, the stop mark may not be noticeable to a level that cannot be visually observed by continuing rolling a plurality of times. However, when a high quality surface gloss is strictly required, a new problem of being treated as a defective product arises.
- the strip storage device 9 is provided, and the strip storage device 9 stores the strip except during joining, and the strip stored in the strip storage device 9 is discharged during joining, and the leading coil tail end is stopped.
- the rolling by low-speed rolling it is possible to prevent the work roll stop mark from being generated on the strip during the joining operation.
- the strip storage length can be set to 20 m.
- the rolling speed of the low-speed rolling is lowered, the length of the strip stored in the strip storage device can be shortened, and the strip storage device can be made compact. As a result, the equipment configuration can be simplified. Note that the rolling speed can be lowered to the minimum resolution speed (infinitely close to 0) of the cold rolling mill 1.
- the cold rolling mill 1 includes, for example, upper and lower work rolls 11 and 11 that are in direct contact with the rolling material and rolled, upper and lower intermediate rolls 12 and 12 that support these work rolls in the vertical direction, and these intermediate rolls 12 and 12. It is a 6-stage UC mill provided with the upper and lower reinforcement rolls 13 and 13 which support a vertical direction.
- a hydraulic reduction device 14 is provided below the lower reinforcement roll 13, and the hydraulic reduction device 14 moves the bearing of the lower reinforcement roll 13 up and down based on a command from the control device 20, thereby causing a predetermined reduction. Reduce the strip to volume.
- a load meter 15 is provided above the upper reinforcing roll 13, and information detected by the load meter 15 is output to the control device 20.
- a thickness meter 16a, a plate speed meter 17a, and a shape meter 18a are provided on the inlet side of the first pass of the cold rolling mill 1, and a thickness meter 16b and a plate speed are provided on the outlet side of the first pass of the cold rolling mill 1.
- a total meter 17 b and a shape meter 18 b are provided, and information detected by each is output to the control device 20.
- the plate thickness meter 16 may be a laser Doppler plate speed meter, or may detect the plate speed based on the rotation speed of a deflora or a shape detector.
- a change in sheet thickness on the inlet side of the cold rolling mill 1 is detected by a load meter 15 as a change in rolling load, and a roll reduction amount is adjusted in accordance with the detected load change. It is.
- Monitor AGC control detects a change in the thickness of the outlet side of the cold rolling mill 1 from the thickness gauge 16b on the outlet side, and feeds back the detected thickness change to adjust the amount of reduction by proportional integral control. It is.
- the thickness gauge 16b is provided a few meters away from the cold rolling mill 1, and a time delay occurs in the detection value of the thickness gauge 16b, but there is almost no influence during steady rolling (for example, 1000 mpm). Absent. However, when applied at the time of low-speed rolling (for example, 10 mpm), appropriate information cannot be obtained due to the influence of time delay, and the plate thickness control accuracy is lowered.
- MF-AGC control is applied to the low speed rolling.
- MF-AGC control is as follows.
- the detection value of the entrance side thickness gauge 16a is tracked to just below the rolling stand to be controlled.
- the plate speeds 17a and 17b on the entry side and the exit side are used to detect the respective plate speeds.
- the control device 20 multiplies the inlet side plate thickness by the inlet side outlet side plate speed ratio to estimate the outlet side plate thickness, and adjusts the reduction so that the deviation between the estimated plate thickness and the target plate thickness becomes zero.
- the plate thickness control accuracy equivalent to the plate thickness control accuracy during steady rolling can be maintained even during low-speed rolling.
- the shape control during steady rolling will be described.
- feedback control is applied in which the shape of the strip is measured by the shape meter 18b on the delivery side and corrected based on the deviation between the shape command value and the actual shape value.
- the shape meter 18b is provided several to tens of meters away from the cold rolling mill 1, and a time lag occurs in the detection value of the shape meter 18b, but it is almost influential during steady rolling (for example, 1000 mpm). There is no. However, when applied at the time of low-speed rolling (for example, 10 mpm), appropriate information cannot be obtained due to the influence of time delay, and the shape control accuracy decreases.
- Roll roll vendor control is as follows.
- a load meter 15 detects a change in the rolling load of the cold rolling mill 1, and the control device 20 calculates a roll deflection accompanying the change, and applies a force to the end of the work roll 11 or the intermediate roll 12 based on the calculation result.
- the roll is forcibly bent to control the deflection of the roll.
- the coolant control is as follows. Blocks divided into a predetermined length on the roll surface of the work roll 11 or the intermediate roll 12 are set in advance.
- the change in rolling load of the cold rolling mill 1 is detected by the load meter 15, and the control device 20 calculates the roll deflection accompanying the change, changes the amount of coolant sprayed for each block based on the calculation result, and performs the rolling process. Controls the amount of expansion of the roll due to heat generation.
- Both controls do not use the information in the shape meter 18b, so that the plate thickness control accuracy equivalent to the shape control accuracy during steady rolling can be maintained even during low-speed rolling.
- the structure which concerns on board thickness control and shape control is also provided in 1st Embodiment, and the same control is applied also at the time of the low-speed rolling at the time of dividing the buildup coil 102 by the last pass of 1st Embodiment. Is done.
- FIG. 20 is a schematic view of a cold rolled material facility according to the second embodiment of the present invention. While the cold rolling mill 1 of the third embodiment has one stand, the cold rolling mills 1a and 1b of the second embodiment have two stands.
- the cold rolling mill 1 according to the third embodiment has one stand. However, in order to maximize the effects of improving the annual production amount and reducing the off-gauge rate, it is assumed that there are two stands. Is preferred. Furthermore, 2 stands are preferable in terms of the cost effectiveness. Other configurations are the same as those of the third embodiment, and the control and operation are also the same, and the same effect can be obtained.
- productivity can be further improved by using the cold rolling mills 1a and 1b as two stands.
- Unwinding device 3 Winding / unwinding device (first winding / unwinding device) 3A Winding / unwinding device (first winding / unwinding device, solid type) 4 Winding / unwinding device (second winding / unwinding device) 4A Winding / unwinding device (second winding / unwinding device, solid type) 5 Joining device 6, 6a, 6b Cutting device 9 Strip storage device 11 Work roll 12 Intermediate roll 13 Reinforcement roll 14 Hydraulic reduction device 15 Load gauges 16a, 16b Plate thickness gauges 17a, 17b Plate speed gauges 18a, 18b Shape gauge 20 Control device 21 Process computer 51, 52 Electrode wheel 53, 54 Pressure roller 55, 56 Clamp device 57 Carriage frame, 58 Electrode wheel pressing device 59 Pressure roller pressing device 60 Inclination mechanism 61, 62 Shaft core 63 Straight line 64 passing through the center of the pressure roller in the direction perpendicular to the shaft core 64 Contact length portion 71 Rotating shaft
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Abstract
Description
次に、本発明の第1実施形態について図面を参照して説明する。本実施例における冷間圧延材として、冷間圧延鋼板を例に説明する。
図1は、本発明の第1実施形態に係わる冷間圧延材設備の概略図である。
図2~4は、制御装置20が行う処理手順を示す制御フローである。点線は、各装置1~6間の関係を示す。3つの搬入コイル101からビルドアップコイル102を形成し、4パス圧延する場合の制御について説明する。図5~7は、制御フローに対応する各装置1~6のタイムテーブルであり、制御フローの処理ステップに相当する箇所に、同じステップ番号を付している。
本実施形態に係わる冷間圧延材設備の動作について説明する。3つの搬入コイル101からビルドアップコイル102を形成し、4パス圧延し、3つの搬入コイル103を形成する場合の動作について説明する。
第1搬入コイル101aが巻出装置2に搬入、装着されると、第1搬入コイル101aのストリップは通板速度で巻き出され、冷間圧延機1に通板され、巻取巻出装置4にグリップされ、さらに数巻き分巻き取られる。その後、冷間圧延機1は圧下制御される(S1201→S1202→S1101→S1401→S1102)。
第1パス終了後、圧延方向を逆方向に切り替え、第2パスを開始する。
第3パス終了後、圧延方向を逆方向に切り替え、第4パスを開始する。
本実施形態の効果を第1従来技術、第2従来技術と比較することにより説明する。
ビルドアップコイル102形成において、厚みが均一の第1搬入コイル101aと第2搬入コイル101bを接合し、かつ、厚みが均一の第2搬入コイル101bと第3搬入コイル101cを接合し、ビルドアップコイル102の厚み変化が無いことが前提である。しかし、実際には誤差により搬入コイル101a~101c間で板厚が異なる場合があり、接合部に段差が生じる。接合部はビルドアップコイル102の内層部に位置し、この状態でコイルに張力が作用すると、接合部の段差が各層の内側及び外側に転写し、疵として取り扱われる製品不良をもたらす課題があった。
加圧ローラ53の軸芯61を溶接線Xに直交する直線Yに対して水平面内で傾斜させて加圧ローラ53を接合部Jに押し付けながら積極的に回転駆動すると、加圧ローラ53と接合部J間の押圧力及び摩擦係数により、接合部Jとの接触孤長部分64に溶接線Xに直角方向の速度ベクトル成分R2に対応した摩擦力が作用し、接合部Jにはその摩擦力に対応した溶接線Xに直交する方向の剪断力82(図14A~15B参照)が作用し、接合部Jに速度ベクトル成分R1の方向(溶接線Xに平行な方向)のメタルフローだけではなく速度ベクトル成分R2の方向(溶接線Xに直角方向)のメタルフロー、すなわち剪断力82による剪断変形による溶接線Xに直角方向の塑性流動が生じる。この溶接線Xに直角方向の剪断変形ないしは塑性流動により接合部Jの段差Sを平滑化することが出来る。
本実施形態において、ビルドアップコイル102の外径はφ3000以下とする。また、ビルドアップコイル102外径が大径時のストリップ張力を小径時と比較し、漸次低くなるように設定されている。図16は、ビルドアップコイル102巻取り時の張力制御を示す図である。ビルドアップコイル102外径がφ1500未満の時は、定常の所定値の張力が与えられるが、ビルドアップコイル102外径がφ1500以上になると、外径が大きくなるにしたがって漸次低くなるように設定されている。
次に、本発明の第2実施形態について図面を参照して説明する。図17は、本発明の第2実施形態に係わる冷間圧延材設備の概略図である。第1実施形態の冷間圧延機1が1スタンドであったのに対し、第2実施形態の冷間圧延機1a,1bは2スタンドになっている。
次に、本発明の第3実施形態について図面を参照して説明する。
図18は、本発明の第3実施形態に係わる冷間圧延材設備の概略図である。本実施形態に係わる冷間圧延材設備は、第1実施形態に係わる冷間圧延材設備の構成に加えて、接合装置5と冷間圧延機1間に配置されたストリップ貯蔵装置9を備えている。
図19は、制御装置20が行う処理手順を示す制御フローである。第2~4パスにおける制御は第1実施形態の制御と同じであり、第1パスにおける制御のみ示す。
第1実施形態では、第1パスにおいて、第2搬入コイル101bが巻出装置2に搬入され、第1搬入コイル101aのストリップ尾端と第2搬入コイル101bのストリップ先端とが接合される一連の動作(S1204→S1205→S1206→S1501)の間、冷間圧延機1は停止している(S1104)が、本実施形態に係わる冷間圧延材設備は下記の通り動作する。
本実施形態の効果を第1実施形態と比較することにより説明する。
本実施形態では、接合作業中やコイル分断時に低速圧延を行っているが、これにより、板厚制御精度が低下するという新たな課題や、形状制御精度が低下するという新たな課題が発生する。すなわち、定常圧延速度において板厚制御および形状制御はフィードバック制御を行っているが、低速においては時間遅れが顕著となり精度が低下する。
次に、本発明の第4実施形態について図面を参照して説明する。図20は、本発明の第2実施形態に係わる冷間圧延材設備の概略図である。第3実施形態の冷間圧延機1が1スタンドであったのに対し、第2実施形態の冷間圧延機1a,1bは2スタンドになっている。
2 巻出装置
3 巻取巻出装置(第1巻取巻出装置)
3A 巻取巻出装置(第1巻取巻出装置、ソリッド型)
4 巻取巻出装置(第2巻取巻出装置)
4A 巻取巻出装置(第2巻取巻出装置、ソリッド型)
5 接合装置
6,6a,6b 切断装置
9 ストリップ貯蔵装置
11 作業ロール
12 中間ロール
13 補強ロール
14 油圧圧下装置
15 荷重計
16a,16b 板厚計
17a,17b 板速計
18a,18b 形状計
20 制御装置
21 プロセスコンピュータ
51,52 電極輪
53,54 加圧ローラ
55,56 クランプ装置
57 キャリッジフレーム、
58 電極輪押圧装置
59 加圧ローラ押圧装置
60 傾斜機構
61,62 軸芯
63 加圧ローラの軸芯直角方向の幅方向中央部を通る直線
64 接触孤長部分
71 回転軸
72,73 ピニオン
74 電動モータ
75 傾斜角度制御装置
76 角度センサ
77 上位制御装置
81 スラスト力
82 剪断力
91 固定ローラ
92 可動ローラ
101,101a~c 搬入コイル
102 ビルドアップコイル
103,103a~c 搬出コイル
111 ビルドアップコイル用巻取巻出装置
112,113 巻取装置
Claims (24)
- コイルを巻き出す巻出装置(2)と、少なくとも1台の可逆式の冷間圧延機(1,1a,1b)と、前記冷間圧延機(1,1a,1b)の第1パスの入側及び出側にそれぞれ配置された第1及び第2巻取巻出装置(3,4)と、前記巻出装置(2)と前記第1巻取巻出装置(3)との間に配置された接合装置(5)とを用いて、圧延方向を変えて複数パスの冷間圧延を行う可逆式冷間圧延方法において、
前記巻出装置(2)から巻き出された第1コイル(101a)のストリップを前記冷間圧延機(1,1a,1b)に直接導いて圧延し前記第2巻取巻出装置(4)に巻き取る圧延工程(S1103)と、
前記第1コイル(101a)尾端が前記接合装置(5)に到達した時点で、前記第1コイル(101a)尾端と巻出装置(2)から引き続き巻き出された第2コイル(101b)先端とを接合する接合工程(S1501)と、
引き続いて行う第2コイル(101b)以降、前記圧延工程(S1105,S1106,S1108,S1109)及び接合工程(S1502)を繰り返して、前記冷間圧延機による第1パスの圧延と前記接合装置による先行コイル尾端と後行コイル先端との接合を行い、複数のコイルを一つのコイルにビルドアップする第1パスのコイルビルドアップ圧延工程(S1101~S1111,S1201~S1212,S1401~S1410,S1501~S1502,S1901B~S1904B)と、
前記ビルドアップしたコイル(102)を、所望の製品板厚になるまで、所定の回数の可逆圧延を行う可逆圧延工程(S2101~S4301,S4306,S4311,S4401~S4406)と、
前記可逆圧延工程の最終パスで前記ビルドアップしたコイル(102)を切断装置(7a,7b)により分断して、前記第1及び第2巻取巻出装置(3,4)のいずれかに巻き取り、複数個のコイル(103a~c)を形成する分断巻取工程(S4302~S4304,S4307~S4309,S4312~S4314,S4601~S4603)とを有することを特徴とする可逆式冷間圧延方法。 - 請求項1に記載の可逆式冷間圧延方法おいて、
前記冷間圧延機(1,1a,1b)と接合装置(5)間にストリップ貯蔵装置(9)を設け、前記接合工程(S1501,S1502,S1901B~S1904B)における先行コイル尾端と後行コイル先端との接合中の圧延速度を、0mpmを超え50mpm以下とすることを特徴とする可逆式冷間圧延方法。 - 請求項1乃至請求項2のいずれか1項に記載の可逆式冷間圧延方法において、
前記分断巻取工程(S4302~S4304,S4307~S4309,S4312~S4314,S4601~S4603)において、最終パスでコイル(102)を分断する際の圧延速度を、0mpmを越え50mpm以下とすることを特徴とする可逆式冷間圧延方法。 - 請求項1乃至請求項3のいずれか1項に記載の可逆式冷間圧延方法において、
前記接合工程(S1501,S1502,S1901B~S1904B)および分断巻取工程(S4302~S4304,S4307~S4309,S4312~S4314,S4601~S4603)において、前記冷間圧延機(1,1a,1b)の入側圧延速度および入側板厚ならびに出側圧延速度を測定し、これら測定値に基づき、前記冷間圧延機(1,1a,1b)の作業ロール直下の板厚を演算し、前記冷間圧延機(1,1a,1b)が有する油圧圧下装置(14)にて所望の板厚となるように板厚制御することを特徴とする可逆式冷間圧延方法。 - 請求項1乃至請求項4のいずれか1項に記載の可逆式冷間圧延方法において、
前記接合工程(S1501,S1502,S1901B~S1904B)および分断巻取工程(S4302~S4304,S4307~S4309,S4312~S4314,S4601~S4603)において、前記冷間圧延機(1,1a,1b)の圧延荷重の変動によるロールたわみ演算結果に基づき、ロールベンダー制御またはクーラント制御またはこれらの両方の制御でストリップ形状を制御することを特徴とする可逆式冷間圧延方法。 - 請求項1乃至請求項5のいずれか1項に記載の可逆式冷間圧延方法において、
前記圧延工程(S1101)の前に、先行コイルと後行コイルの板厚差の絶対値を、1mm以下とするように前記巻出装置(2)に搬入するコイルの順番を事前に調整することを特徴とする可逆式冷間圧延方法。 - 請求項1乃至請求項6のいずれか1項に記載の可逆式冷間圧延方法において、
前記接合工程(S1501,S1502)において、前記接合装置(5)としてマッシュシーム溶接方式の接合装置を用いて接合することを特徴とする可逆式冷間圧延方法。 - 請求項7に記載の可逆式冷間圧延方法おいて、
前記マッシュシーム溶接方式の接合装置(5)による接合直後のクロススウェージング処理を行うことを特徴とする可逆式冷間圧延方法。 - 請求項1乃至請求項8のいずれか1項に記載の可逆式冷間圧延方法において、
前記コイルビルドアップ圧延工程(S1101~S1502,S1901B~S1904B)において、前記ビルドアップしたコイル外径はφ3000以下とすることを特徴とする可逆式冷間圧延方法。 - 請求項1乃至請求項9のいずれか1項に記載の可逆式冷間圧延方法において、
コイル外径が大径時のストリップの張力を小径時のストリップの張力と比較し、漸次低く設定することを特徴とする可逆式冷間圧延方法。 - 請求項1乃至請求項10のいずれか1項に記載の可逆式冷間圧延方法において、
前記可逆圧延工程(S2101~S4109)及びコイルビルドアップ圧延工程(1101~1111)において、前記冷間圧延機として2スタンドの冷間圧延機(1a,1b)を用いて圧延することを特徴とする可逆式冷間圧延方法。 - 請求項1乃至請求項11のいずれか1項に記載の可逆式冷間圧延方法において、
前記分断巻取工程(S4601~S4603)において、最終パスでのコイル分断を接合部が前記切断装置(7a,7b)を通過直後とすることを特徴とする可逆式冷間圧延方法。 - 請求項12に記載の可逆式冷間圧延方法において、
前記分断巻取工程(S4601~S4603)において、最終パスでのコイル分断を接合部が前記切断装置(7a,7b)を通過する直前と、接合部が前記切断装置(7a,7b)を通過した直後にすることを特徴とする可逆式冷間圧延方法。 - 請求項1乃至請求項13のいずれか1項に記載の可逆式圧延方法において、
前記分断巻取工程(S4601~S4603)における、最終パスの圧延開始前に、ストリップが通板された状態で作業ロールをダル目付け用作業ロールに組替え、最終パスの圧延を行うことを特徴とする可逆式冷間圧延方法。 - コイルを巻き出す巻出装置(2)と、少なくとも1台の可逆式の冷間圧延機(1,1a,1b)と、この冷間圧延機の第1パスの入側及び出側にそれぞれ配置された第1及び第2巻取巻出装置(3,4)と、前記巻出装置(2)と前記第1巻取巻出装置(3)との間に配置された接合装置(5)とを用いて、圧延方向を変えて複数パスの冷間圧延を行う可逆式冷間圧延設備において、
前記巻出装置(2)から巻き出された第1コイル(101a)のストリップを前記冷間圧延機(1,1a,1b)に直接導いて圧延し前記第2巻取巻出装置(4)に巻き取り、
前記第1コイル(101a)尾端が前記接合装置(5)に到達した時点で、前記第1コイル(101a)尾端と前記巻出装置(2)から引き続き巻き出された第2コイル(101b)先端とを接合し、
引き続いて第2コイル(101b)以降の圧延及び接合を繰り返して、前記冷間圧延機(1,1a,1b)による第1パスの圧延と前記接合装置(5)による先行コイル尾端と後行コイル先端との接合を行い、複数のコイルを一つのコイルにビルドアップし、
前記冷間圧延機(1,1a,1b)において前記ビルドアップしたコイル(102)を、所望の製品板厚になるまで、所定の回数の可逆圧延を行い、
可逆圧延の最終パスで前記ビルドアップしたコイル(102)を切断装置(7a,7b)により分断して、前記第1及び第2巻取巻出装置(3,4)のいずれかに巻き取り、複数個のコイル(103a~c)をを形成するように、
前記巻出装置(2)、前記冷間圧延機(1,1a,1b)、前記第1及び第2巻取巻出装置(3,4)、前記接合装置(5)及び前記切断装置(7a,7b)を制御する制御装置(20)を設けたことを特徴とする可逆式冷間圧延設備。 - 請求項15に記載の可逆式冷間圧延設備において、
前記接合装置(5)と前記冷間圧延機(1,1a,1b)間にストリップ貯蔵装置(9)を配置することを特徴とする可逆式冷間圧延設備。 - 請求項16に記載の可逆式冷間圧延設備において、
前記ストリップ貯蔵装置(9)のストリップ貯蔵長さを0mを超え100m以下とすることを特徴とする可逆式冷間圧延設備。 - 請求項15乃至請求項17いずれか1項に記載の可逆式冷間圧延設備において、
前記制御装置(20)は、前記接合装置(5)によるコイル接合中、および前記切断装置(7a,7b)によるコイル分断時の前記冷間圧延機(1,1a,1b)の圧延速度を、0mpmを超え50mpm以下に制御することを特徴とする可逆式冷間圧延設備。 - 請求項15乃至請求項18のいずれか1項に記載の冷間圧延装置において、
前記制御装置(20)は、前記接合装置(5)によるコイル接合中および前記切断装置(7a,7b)によるコイル分断時に、前記冷間圧延機(1,1a,1b)の入側圧延速度、および入側板厚ならびに出側圧延速度を測定し、これら測定値に基づき、前記冷間圧延機(1,1a,1b)の作業ロール直下の板厚を演算し、前記冷間圧延機が有する油圧圧下装置(14)にて所望の板厚となるように板厚制御することを特徴とする可逆式冷間圧延装置。 - 請求項15乃至請求項19のいずれか1項に記載の冷間圧延装置において、
前記制御装置(20)は、前記接合装置(5)によるコイル接合中および前記切断装置(7a,7b)によるコイル分断時に、前記冷間圧延機(1,1a,1b)の圧延荷重の変動によるロールたわみ演算結果に基づき、ロールベンダー制御またはクーラント制御またはこれらの両方の制御でストリップ形状を制御することを特徴とする可逆式冷間圧延装置。 - 請求項15乃至請求項20のいずれか1項に記載の冷間圧延装置において、
前記制御装置(20)は、前記第1パスのコイルビルドアップ圧延時及びその後の可逆圧延中に、コイル外径が大径であるときのストリップの張力を小径であるときのストリップの張力と比較し、低く設定することを特徴とする可逆式冷間圧延装置。 - 請求項15乃至請求項21のいずれか1項に記載の冷間圧延装置において、
前記冷間圧延機(1a,1b)を2スタンドとすることを特徴とする可逆式冷間圧延装置。 - 請求項15乃至請求項22のいずれか1項に記載の可逆式圧延設備において、
前記接合装置(5)をマッシュシーム溶接機とすることを特徴とする可逆式冷間圧延設備。 - 請求項23に記載の可逆式冷間圧延設備において、
前記接合装置(5)のマッシュシーム溶接機は、接合線直角方向の水平面に対し、スウェージングローラ軸芯を傾斜させる機構(60)を有するスウェージングローラ(53)を備えることを特徴とする可逆式冷間圧延設備。
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PCT/JP2009/069064 WO2011055458A1 (ja) | 2009-11-09 | 2009-11-09 | 冷間圧延材製造設備および冷間圧延方法 |
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EP (1) | EP2500114B1 (ja) |
JP (1) | JP4864173B2 (ja) |
KR (1) | KR101428895B1 (ja) |
CN (1) | CN102612414B (ja) |
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WO (1) | WO2011055458A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101832644B1 (ko) * | 2013-12-20 | 2018-04-13 | 노벨리스 도 브라질 엘티디에이. | 탠덤 롤링 밀에서 온도를 제어하기 위한 감축의 동적 시프팅(dsr) |
CN117000759A (zh) * | 2023-10-07 | 2023-11-07 | 福建紫金英菲迅应用材料有限公司 | 一种金锡合金制品生产设备及其使用方法 |
Families Citing this family (6)
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CN103464457A (zh) * | 2013-08-19 | 2013-12-25 | 中国重型机械研究院有限公司 | 一种混合轧制的可逆冷轧机组 |
CN103447313A (zh) * | 2013-09-06 | 2013-12-18 | 鞍钢股份有限公司 | 一种冻结中厚板自动程序轧制道次的方法 |
JP6020479B2 (ja) | 2014-01-29 | 2016-11-02 | Jfeスチール株式会社 | 冷間圧延設備および冷間圧延方法 |
CN105964688B (zh) * | 2016-06-21 | 2018-04-03 | 广西梧州市金海不锈钢有限公司 | 一种自动可逆冷轧控制装置及控制方法 |
PL3883701T3 (pl) * | 2018-11-23 | 2023-01-30 | John Cockerill S.A. | Elastyczna walcarka do walcowania na zimno i sposób jej konwersji |
WO2021106543A1 (ja) * | 2019-11-25 | 2021-06-03 | Jfeスチール株式会社 | 鋼帯のノッチング方法、冷間圧延方法および冷延鋼帯の製造方法 |
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- 2009-11-09 JP JP2011533442A patent/JP4864173B2/ja active Active
- 2009-11-09 EP EP09851110.8A patent/EP2500114B1/en active Active
- 2009-11-09 BR BR112012010890-5A patent/BR112012010890A2/pt not_active Application Discontinuation
- 2009-11-09 KR KR1020127011545A patent/KR101428895B1/ko active IP Right Grant
- 2009-11-09 CN CN200980162372.1A patent/CN102612414B/zh active Active
- 2009-11-09 WO PCT/JP2009/069064 patent/WO2011055458A1/ja active Application Filing
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JP2006334647A (ja) * | 2005-06-03 | 2006-12-14 | Jp Steel Plantech Co | 圧延方法および圧延設備 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101832644B1 (ko) * | 2013-12-20 | 2018-04-13 | 노벨리스 도 브라질 엘티디에이. | 탠덤 롤링 밀에서 온도를 제어하기 위한 감축의 동적 시프팅(dsr) |
CN117000759A (zh) * | 2023-10-07 | 2023-11-07 | 福建紫金英菲迅应用材料有限公司 | 一种金锡合金制品生产设备及其使用方法 |
CN117000759B (zh) * | 2023-10-07 | 2023-12-08 | 福建紫金英菲迅应用材料有限公司 | 一种金锡合金制品生产设备及其使用方法 |
Also Published As
Publication number | Publication date |
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EP2500114A4 (en) | 2013-06-12 |
CN102612414B (zh) | 2016-01-20 |
BR112012010890A2 (pt) | 2020-08-25 |
EP2500114A1 (en) | 2012-09-19 |
KR101428895B1 (ko) | 2014-08-08 |
KR20120060913A (ko) | 2012-06-12 |
CN102612414A (zh) | 2012-07-25 |
JP4864173B2 (ja) | 2012-02-01 |
JPWO2011055458A1 (ja) | 2013-03-21 |
EP2500114B1 (en) | 2015-10-14 |
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