JP2013237080A - Apparatus for manufacturing metal coil material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for manufacturing a metal coil material, which is capable of manufacturing the metal coil material having excellent surface texture.SOLUTION: An apparatus 100A for manufacturing a metal coil material includes: rolling rolls 10u, 10d for rolling a metal; and a reel 17 for spirally winding an obtained rolled plate 1. The manufacturing apparatus 100A further includes: a work roll (such as a pinch roll 13) which is arranged between the rolling rolls 10u, 10d and the reel 17, and brought into contact with the rolled plate 1 that has been subjected to a rolling mill 10 to execute a predetermined action; and a roll side removing member 20 for removing rolling scraps deposited on a surface of the work roll, i.e., a proximal work roll arranged at the position closest to the rolling rolls 10u, 10d. Removing of the rolling scraps that are deposited on the proximal work roll by the roll side removing member 20 prevents generation of large indentations which is caused by pressing the rolling scraps against the rolled plate 1 by the work roll. Thus, the manufacturing apparatus 100A can manufacture a metal coil material having excellent surface texture.

Description

  The present invention relates to a metal coil material manufacturing apparatus for manufacturing a metal coil material obtained by winding a long rolled plate into a spiral shape. In particular, the present invention relates to a metal coil material manufacturing apparatus capable of manufacturing a metal coil material having excellent surface properties.

  A metal coil material obtained by winding a long rolled plate into a spiral shape is used as a material for a plastic working member that is subjected to various plastic workings such as press working. Examples of such a metal coil material include steel made of stainless steel, copper, copper alloy, aluminum, aluminum alloy, and the like. In these metals that can be cold worked, when performing cold rolling, a large amount of lubricant (rolling oil) is used to improve lubricity, and after rolling, the excess is removed. (For example, see Patent Document 1).

  On the other hand, Patent Document 2 discloses that a magnesium alloy coil material excellent in press workability can be obtained by subjecting a material made of AZ91 alloy in the ASTM standard to rolling by performing specific temperature control. Since the crystal structure of the magnesium alloy is dense hexagonal, the slip surface at a low temperature such as room temperature is only the bottom surface. Therefore, when performing various plastic workings such as rolling and pressing on a magnesium alloy, it is generally performed in a state of being heated to a temperature of 200 ° C. or higher (typically warm). In particular, alloy types with high Al content (for example, AZ91 alloy in ASTM standard) are inferior in plastic workability compared to alloy types with low Al content (for example, AZ31 alloy and AZ61 alloy in ASTM standard). When performing plastic working such as rolling or pressing, the material is heated.

JP 2000-263123 A JP 2011-131274 A

  When a plastic working member is manufactured by performing plastic working such as press working, if a continuous long plate or a wider plate is used as a material, a sheet plate cut to a predetermined length is used. Compared to the case of using, it is expected that the yield can be reduced and the productivity can be improved. Therefore, it can be said that a metal coil material obtained by winding a long rolled plate or a wider rolled plate is a suitable material for mass production of plastic working members.

  In using a rolled plate as a material for the plastic working member, an apparatus capable of producing a metal coil material having excellent surface properties is desired.

  For example, as described in Patent Document 2, a magnesium alloy coil material having excellent surface properties such as having a metallic luster can be obtained by polishing a rolled plate. In addition, the amount of polishing for producing a metallic luster is at most about 100 μm in total on the front and back sides of the rolled plate, and is usually 30 μm or less from the viewpoint of material yield. Since the polishing amount is light and the polishing amount is small, a rolled plate having a thickness that allows for the polishing amount is manufactured.

  However, when large wrinkles (dents) occur during rolling, particularly when deep wrinkles occur, it is necessary to increase the amount of polishing in order to eliminate such wrinkles. As a result, the amount of material discarded increases and the polishing time becomes longer, leading to a decrease in productivity. In addition, if only the ridges are polished, the thickness in the longitudinal direction and the width direction of the rolled plate constituting the coil material varies, and therefore the amount of polishing is large over the entire length and the entire width of the rolled plate constituting the coil material. It is necessary to polish. Then, a healthy part without wrinkles will be polished in a large amount, resulting in poor yield and reduced productivity. Further, when there is a wrinkle that is difficult to remove by polishing, the portion of the wrinkle must be cut and removed, and a long metal coil material cannot be obtained.

  As a result of investigation by the present inventors, it has been found that as one of the causes of large wrinkles, scraps dropped from the rolled plate main body (hereinafter referred to as rolling scraps) are caused as described later. In particular, in the case of a metal that is desired to be cold-rolled, such as a magnesium alloy, compared to the case where cold-rolling is performed on a metal that can be cold-rolled, such as steel, rolling scraps are easily generated as described later. It was found that large wrinkles are likely to occur after rolling.

  In the case of a metal that can be cold-rolled, as described above, rolling scraps can be washed away by using a large amount of rolling oil. For this reason, it has been possible to reduce the generation of large wrinkles to a level that can be almost ignored. However, there is a limit to the improvement of surface properties only by using a large amount of rolling oil. Further, in warm rolling, if a large amount of lubricant is used, the raw material is cooled by the lubricant and rollability is lowered. For this reason, rolling scraps cannot be substantially washed away by a large amount of lubricant.

  Therefore, regardless of the amount of rolling oil used, it is possible to produce a metal coil material with excellent surface properties that has no wrinkles, preferably no wrinkles, and can be removed by light polishing with a small polishing amount after rolling. Development of simple manufacturing equipment is desired.

  Then, the objective of this invention is providing the manufacturing apparatus of the metal coil material which can manufacture the metal coil material which is excellent in surface property.

  For example, a magnesium alloy, particularly a magnesium alloy containing more than 7.2% by mass of Al and containing a large amount of Al, is easily cracked because the edge of the rolled sheet is easier to cool than the central part during warm rolling ( (See Patent Document 2). Rolling scraps are easily generated due to the cracks at the edges. As described in Patent Document 2, by performing specific temperature adjustment, although the above-described edge cracks can be reduced to some extent, rolling scraps can be generated. And this rolling waste may adhere to the surface of a rolling plate. Here, even with a metal subjected to warm rolling, such as a magnesium alloy, the rolling property can be improved by using a lubricant (see Patent Document 2). Thus, when such a metal is subjected to warm rolling, an amount of lubricant that does not decrease the temperature of the material (a small amount compared to the metal that is subjected to cold rolling) may be used. In this case, it is considered that the lubricant remains on the rolled plate, so that the above-mentioned rolling scraps are easily attached and are not easily detached from the surface of the rolled plate.

  On the other hand, when a coil material is manufactured by winding a plate material rolled by a rolling roll with a reel, a roll that performs various actions on the rolled plate (hereinafter referred to as a work roll) is closer to the reel side than the rolling roll. May be placed. The work roll is used in contact with a plate material (rolled plate) that has passed through the roll (details will be described later). As a result of investigations by the present inventors, these work rolls are in contact with the rolling plate to which the above-mentioned rolling scraps are attached, so that the rolling scraps are attached to the above-mentioned work rolls, and further, the work rolls to which the rolling scraps are attached. However, it has been found that by pressing the rolling scraps one after another on the rolling plates that have passed through the rolling rolls, indentations corresponding to the rolling scraps can be generated on the rolling plates. This indentation is repeated until the rolling scrap attached to the work roll falls off naturally. Therefore, indentations are continuously formed at a pitch according to the circumference of the work roll. As a result, it has been found that a coil material having indentations intermittently or continuously can be produced over the entire length of the wound metal coil material.

  Based on the above findings, it is proposed that the metal coil material manufacturing apparatus of the present invention includes a member that removes rolling scraps attached to the work roll when manufacturing a metal coil material having excellent surface properties.

  An apparatus for producing a metal coil material according to the present invention comprises an apparatus for producing a metal coil material, comprising a rolling roll for rolling metal and a reel for winding a rolled plate obtained by the rolling in a spiral shape. It is. The apparatus for producing a metal coil material according to the present invention includes at least one work roll that is disposed between the rolling roll and the reel and that contacts the rolling plate that has passed through the rolling roll to perform a predetermined action on the rolling plate. And the roll side removal member which removes the rolling waste adhering to the surface of the nearest work roll arrange | positioned in the position nearest to the said rolling roll among the said work rolls is provided.

  The metal coil material manufacturing apparatus of the present invention produces rolling scraps, and even when the rolling scraps adhere to the surface of the nearest work roll arranged near the rolling roll, the roll side removal member removes the nearest work roll. In order to remove the rolling scraps, it is possible to effectively reduce the occurrence of large indentations caused by pressing the rolling scraps against the rolled plate with the latest work roll. Therefore, the metal coil material manufacturing apparatus of the present invention does not depend on the amount of rolling oil used, and does not have large wrinkles (indentations) as described above, and has excellent surface properties (for example, a magnesium alloy coil material). ) Can be manufactured. The roll-side removal member typically removes the rolling scrap from the latest work roll by entwining or blocking the rolling scrap. Rolled debris that has been entangled or dammed up should be removed (discarded) as appropriate once it has accumulated to some extent.

  The metal coil material obtained by the metal coil material manufacturing apparatus of the present invention has few large wrinkles (indentations) and is small even if wrinkled, and can be sufficiently removed by light polishing. Therefore, the metal coil material does not need to cut and remove the portion of the ridge, can be a sufficiently long rolled plate, and can reduce the amount of material discarded and the amount of polishing by cutting. From these points, the metal coil material manufacturing apparatus of the present invention is excellent in surface properties and can manufacture a long metal coil material with high productivity. Moreover, the metal coil material which is more excellent in surface property can be manufactured by lightly polishing the metal coil material so as to give a metallic luster.

  The metal coil material obtained by the metal coil material manufacturing apparatus of the present invention is excellent in surface property as described above, and is long and excellent in productivity. Such a metal coil material can be suitably used as a material for a plastic working member to be subjected to plastic working (secondary working), for example, press working. Moreover, since this metal coil material is comprised from a elongate board | plate material (rolled board), it is anticipated that it can contribute to the mass production of the said plastic working member. Furthermore, the obtained plastic working member is also expected to be excellent in surface properties.

  As one aspect of the present invention, there is further provided a plate-side removal member that is disposed between the rolling roll and the nearest work roll, and that removes rolling scraps attached to at least one of the upper surface and the lower surface of the rolled plate existing therebetween. There are several forms.

  The said form removes the said rolling waste with a plate side removal member, before the rolling waste adhering to the rolling plate by the driving | running | working of the rolled plate is conveyed to the nearest work roll. Therefore, since the said form can reduce the rolling scrap itself adhering to the latest work roll, generation | occurrence | production of the impression by rolling scrap can be reduced effectively and the metal coil material which is excellent in surface property can be manufactured.

  As an embodiment of the present invention, the latest work roll adjusts the tension applied to the rolled sheet, a pinch roll that adjusts the winding angle of the rolled sheet, and a tension that measures the tension distribution applied to the rolled sheet. The form which is any one of meter rolls is mentioned.

  There can be various work rolls arranged between the rolling roll and the reel for winding. In addition, the arrangement order of the work rolls, the number of use, and the like can be selected as appropriate. In producing the metal coil material, for example, when the pinch roll is provided, it is possible to adjust the tension applied to the traveling rolled plate, and thus it is possible to suppress excessive tension from being applied to the rolled plate. When manufacturing a magnesium alloy coil material, when a deflector roll is provided, the winding angle of the rolled plate to the reel can be adjusted according to the thickness wound on the reel when the rolled plate is wound in multiple layers. . Therefore, it can suppress that an excessive bending etc. are added to the rolled sheet before winding. When producing a magnesium alloy coil material, if a tension meter roll is provided, it is possible to reliably grasp the distribution of the tension in the width direction of the rolled sheet due to an abnormality in flatness (variation in flatness). Based on the measured distribution, using a mechanism such as a roll bender, the flatness of the rolled plate can be adjusted during rolling, and a coil material with excellent flatness can be obtained. Regardless of the case where the latest work roll is any of the above, the above form can produce a metal coil material that has few cracks and deformations and is excellent in surface properties.

  As one form of this invention, the said roll side removal member has the form by which the location which contacts the said nearest work roll at least was comprised with the felt.

  In the above-mentioned form, the portion that comes into direct contact with the latest work roll is made of a soft material such as felt, so that the rolling waste can be sufficiently entangled and the wrinkle can be substantially attached to the latest work roll by the roll-side removal member. No rolling scraps can be removed.

  As one form of this invention, the said plate side removal member has the form by which the location which contacts the said rolled sheet at least was comprised with the felt.

  In the above-described embodiment, the material of the portion directly contacting the rolled plate in the plate-side removing member is made of a soft material such as felt, so that the rolled plate is not substantially brazed by the plate-side removing member itself. And the said form can remove a rolling waste, without pressing the rolled-up waste wound on a rolling plate and attaching a wrinkle.

  As one form of this invention, the said removal member has a form which provides a plate-shaped scraper or a wiping roll.

  As described in Patent Document 1, a plate scraper and a wiping roll are used for removing rolling oil, and are expected to be used for removing rolling debris. In particular, when a plate scraper or wiping roll made of a material harder than felt such as resin is used, it is expected that rolling scraps can be easily damped. In addition, although there exists a possibility that a rolling plate may be wrinkled with the plate-shaped scraper which consists of a hard material, this wrinkle is shallow enough to be removed enough by light grinding | polishing.

  As one form of this invention, the form whose said metal is a magnesium alloy is mentioned.

  As described above, since the magnesium alloy can produce rolling scraps during warm rolling, the above embodiment can effectively remove the rolling scraps, and thus can produce a magnesium alloy coil material having excellent surface properties.

  As one mode of the present invention, a mode in which the metal is a magnesium alloy and the magnesium alloy contains Al in excess of 7.2% by mass.

  Magnesium alloys with an Al content exceeding 7.2 mass% (hereinafter referred to as high Al magnesium alloys) are more likely to produce rolling scraps, so the above form produces a magnesium alloy coil material with excellent surface properties. it can. Further, the high Al magnesium alloy is excellent in mechanical properties (particularly strength) and corrosion resistance. Therefore, the said form can manufacture the magnesium alloy coil material which is excellent in surface property, and is excellent also in intensity | strength and corrosion resistance with high productivity.

  The metal coil material manufacturing apparatus of the present invention can manufacture a metal coil material having excellent surface properties.

1 is a schematic configuration diagram of a metal coil material manufacturing apparatus according to Embodiment 1. FIG. (A) is a schematic configuration diagram of a metal coil material manufacturing apparatus according to Embodiment 2, (B) is a schematic plan view illustrating a state in which a plate-side removal member provided in the manufacturing apparatus is arranged on a rolled plate is there.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The same code | symbol in a figure shows the same name thing.

[Embodiment 1]
A metal coil material manufacturing apparatus 100A according to Embodiment 1 will be described with reference to FIG. The manufacturing apparatus 100A is an apparatus for manufacturing a metal coil material by rolling a material plate 1b made of metal with rolling rolls 10u and 10d and winding the obtained rolled plate 1 in a spiral shape with a reel 17. The manufacturing apparatus 100A according to the first embodiment includes a roll-side removal member 20 for removing rolling scraps attached to the surface of the work roll (here, the pinch roll 13) disposed in the immediate vicinity of the rolling rolls 10u and 10d. Is the biggest feature. Hereinafter, the manufacturing apparatus 100A will be described in detail.

(manufacturing device)
The manufacturing apparatus 100A includes a rolling mill 10 provided with rolling rolls 10u and 10d for rolling the material plate 1b, a reel 17 for winding the rolled plate 1 that has been rolled, and between the rolling mill 10 and the reel 17. A work roll (in FIG. 1, a pinch roll 13 and a deflector roll 15) that is disposed and contacts the rolled plate 1 to perform a predetermined action on the rolled plate 1 and a roll side removing member 20 are provided. The manufacturing apparatus 100A unwinds the material coil material (the material plate 1b wound up), travels the long material plate 1b, performs rolling on the material plate 1b through the rolling mill 10, and creates a long material. The rolled plate 1 is manufactured, and the rolled plate 1 is finally wound to manufacture a coil material. The roll-side removing member 20 is disposed so as to be in sliding contact with the surface of the work roll, and removes the rolling debris from the surface by entwining or blocking the rolling debris attached to the surface of the work roll.

<Rolling mill>
As the rolling mill 10, an appropriate one capable of rolling a desired metal can be used. The rolling mill 10 shown in FIG. 1 shows an example including a pair of rolling rolls 10u and 10d arranged to face each other. However, the rolling mill 10 can include a plurality of pairs of rolling rolls so that multistage rolling is possible. Moreover, when performing warm rolling, the rolling rolls 10u and 10d can be configured to be heatable. In this case, the material plate 1b can be warm-rolled in a state where the temperature of the material plate 1b is sufficiently high. As a result, the occurrence of cracks during rolling can be reduced, the amount of rolling waste generated can be reduced, and a metal coil material having excellent surface properties can be easily manufactured. The rolling rolls 10u and 10d are provided with power and controlled in operation by a roll driving unit (not shown). Examples of the roll drive unit include a power source such as a motor, and a roll control unit that controls ON / OFF of rotation operation, the number of rotations (rotation speed), the gap distance between the rolling rolls 10u and 10d, and the like.

<Reel>
Each of the reel for feeding (not shown) and the reel 17 for winding includes a winding drum around which the rolled plate is wound, and a flange protruding from the surface of the winding drum. These reels are provided with power and controlled in operation by a reel driving unit (not shown). Examples of the reel drive unit include a power source such as a motor and a reel control unit that controls ON / OFF of the rotation operation, the rotation speed (rotation speed), the rotation direction, and the like. The material coil material is arranged on the reel for feeding, the material plate 1b is fed out, and the rolled plate 1 that has passed through the rolling mill 10 is taken up by the winding reel 17, that is, the material plate 1b is placed between the two reels. By rolling and rotating the reel in the same direction, the material plate 1b and the subsequent rolled plate 1 after rolling can be run. When rolling a plurality of passes, so-called reverse rolling can be performed. In reverse rolling, the above-mentioned two reels are alternately switched between feeding and winding, the rotation direction of each reel is reversed, the traveling direction of the plate spanned between the two reels is reversed, and the above plate Is a method of rolling while reciprocating between both reels. Reverse rolling can continuously roll a plurality of passes by reversing the rolling direction and is excellent in coil material productivity.

<Work roll>
In the manufacturing apparatus 100A, the work roll arranged in front of the rolling machine 1 in the traveling direction of the rolling plate 1 (on the winding reel 17 side) is closer to the pinch roll 13 used for tension adjustment, the winding angle of the rolling plate. And a tension meter roll (not shown) that measures the distribution of tension applied to the rolled plate 1.

  The pinch roll 13 can also be used to keep the rolled sheet warm (see Patent Document 2) when performing warm rolling. In this case, heating means such as a heater, a circulation mechanism through which the heated fluid is circulated, and the like are heated to a predetermined temperature, and the heated pinch roll 13 is brought into contact with the rolling plate 1 to perform rolling. It is possible to heat the plate 1 or suppress a decrease in the temperature of the rolled plate 1 (maintain the temperature of the rolled plate 1). When such a heat retaining pinch roll 13 is used, for example, it is possible to wind up warmly and suppress the occurrence of cracks during winding. In the example shown in FIG. 1, a pair of pinch rolls 13u and 13d arranged to face each other is provided, and the upper and lower surfaces of the rolled sheet 1 are sandwiched between the pinch rolls 13u and 13d. With this configuration, the tension applied to the rolled sheet 1 can also be adjusted by adjusting the pressure when the rolled sheet 1 is sandwiched between the pinch rolls 13u and 13d. Moreover, when performing warm rolling, the upper surface and lower surface of the rolled sheet 1 can be heated, or the temperature drop can be suppressed. When the temperature of the rolled sheet 1 subjected to rolling is set to a certain high temperature (for example, about room temperature over 250 ° C., preferably about 100 ° C. to 200 ° C.) using the pinch roll 13, the rolled sheet 1 is warm It is easy to wind up because it is difficult to wind up and break.

  When the rolled plate 1 is thick, when the rolled plate 1 is sufficiently kept warm, or when the distance to winding is long, etc., a form in which a plurality of insulated pinch rolls 13 are arranged so as to be aligned in the traveling direction of the rolled plate 1 It can be. When heating with the pinch roll 13 is unnecessary, the pinch roll is used only for tension adjustment. If heating and tension adjustment is not required, the pinch roll 13 can be removed or omitted.

  The deflector roll 15 is rolled so that the rolled plate 1 can be smoothly wound by the reel 17 by changing the angle of the rolled plate 1 by applying a predetermined bending (bending along the bending radius of the deflector roll 15) to the rolled plate 1. Adjust the angle of plate 1. In the example shown in FIG. 1, the deflector roll 15 is disposed so as to be in contact with the upper surface of the rolled plate 1. However, the deflector roll 15 may be disposed so as to be in contact with the lower surface of the rolled plate 1. The deflector roll 15 is arranged according to the position of the reel 17 and the angle at the time of winding. When adjustment of the angle at the time of winding is unnecessary, the deflector roll 15 can be removed or omitted.

  A tension meter roll (not shown) is used for measuring the distribution of tension applied to the rolled plate 1. Typically, a sensor (for example, a plurality of load cells) is installed inside the tension meter roll, the load distribution corresponding to the tension distribution of the rolled sheet 1 is detected by the sensor, and the tension distribution is measured using this detection signal. To do. The flatness of the coil material during rolling can be controlled by optimizing the tension distribution of the rolled plate 1 with a roll bender or the like according to the measured tension distribution. If tension distribution measurement is not required, the tension meter roll can be omitted.

  Examples of the constituent material of the work roll described above include those that do not react with a desired metal to be rolled and are not easily deformed by heat during warm rolling when performing warm rolling. Typically, steel such as tool steel having excellent heat resistance can be given.

<Roll-side removal member>
The roll-side removal member 20 that removes the rolling scrap (not shown) attached to the surface of the work roll described above is disposed so as to be in sliding contact with the work roll, and the weir portion 21 that removes the rolling scrap, And a supporting portion 23 for supporting.

  Various materials can be used for the weir 21. In particular, a felt made of natural fiber or synthetic fiber is preferable as a constituent material at a position in contact with the work roll. Since the felt is softer than the above-described tool steel or the like, it is expected that the felt is difficult to be wrinkled even when it is in contact with the work roll, or is not substantially wrinkled. Moreover, since it is fibrous, rolling waste can be removed by entwining the rolling waste. In addition, it is expected that the rolling waste can be removed by blocking the rolling waste to some extent. Examples of the constituent material in contact with the work roll include soft materials such as non-felt (industrial) non-woven fabrics and woven fabrics. In addition, the constituent material of the dam portion 21 may be a resin (for example, a fluororesin such as PTFE).

  Specific examples of the weir portion 21 include a columnar material (columnar wiper) such as a prism or cylinder (in FIG. 1, a prismatic wiper is shown). The width of the columnar wiper (the length along the axial direction of the work roll) can be equal to or larger than the axial length of the work roll. In particular, felt-made columnar wipers are preferable because they can remove rolling scraps and prevent wrinkles as described above, and are easy to manufacture.

  Alternatively, the dam portion 21 may be a plate scraper or a wiping roll. In particular, since the plate scraper and the wiping roll are made of the above-described resin, the scrap is removed by damming the rolling scrap because the rigidity is higher than that of the felt. The plate scraper is (1) only the contact point with the work roll is formed with the felt described above, and the other part is made of resin, and (2) the surface of the core material made of steel such as stainless steel is used. It can be composed of a composite material covered with a silicone resin, or (3) composed of an elastic body such as silicone rubber. Of course, a felt plate scraper or a wiping roll can be used. In brushes (especially rotating brushes), hard bristle material or thick bristle material presses the rolling waste held between the bristle materials against the rolled plate 1 or causes the rolled plate 1 to be wrinkled by the held rolling waste. There is a risk that the rolling scraps may be held firmly to the extent possible, and this is considered undesirable.

  As the support portion 23, a configuration capable of supporting the dam portion 21 so as to be in sliding contact with the peripheral surface of the work roll can be appropriately used. For example, the support part 23 is comprised with a metal piece etc., and the structure which can fix the arrangement position of the dam part 21 so that it cannot change is mentioned. In this case, the support portion 23 can have a simple configuration. Alternatively, the support portion 23 may include an elastic body such as a compression spring, a pneumatic cylinder, a hydraulic cylinder, or the like, and may support the dam portion 21 so that the arrangement position of the dam portion 21 can be changed. In this case, it becomes possible to adjust the load (pressing force) of the weir 21 with respect to the work roll, and it is difficult to braze the surface of the work roll by the contact of the weir 21. Alternatively, the support portion 23 is composed of a rod-shaped metal member or the like, and the structure in which the dam portion 21 is suspended and supported so that the dam portion 21 contacts the work roll by its own weight is also possible. It is difficult to identify.

  As the arrangement position of the roll-side removal member 20 with respect to one work roll, an appropriate location where the rolling scraps can be entangled or dammed can be selected. Typically, there is a portion selected from a semicircular arc region (the upper half arc region in the upper pinch roll 13u shown in FIG. 1) located on the side away from the rolled plate 1 in the work roll. In the example shown in FIG. 1, two roll-side removal members 200 and 201 are arranged on the upper pinch roll 13u arranged so as to be in contact with the upper surface of the rolled plate 1. Both roll-side removal members 200 and 201 are disposed in the above-described arc region of the upper half, and are disposed at symmetrical positions with respect to the perpendicular to the upper surface of the rolled plate 1, and the center of the pinch roll 13u (not shown) The angle formed by both members 200 and 201 is about 90 ° as the center. The angle formed above can be changed as appropriate. Further, both members 200 and 201 may be arranged at asymmetric positions.

  The number and arrangement position of the roll-side removal members 20 arranged for one work roll and the total count of the roll-side removal members 20 included in the manufacturing apparatus 100A can be selected as appropriate. For example, the manufacturing apparatus 100A may include roll-side removal members 210 and 211 arranged with respect to the lower pinch roll 13d, or roll-side removal members 200, 201, 210, and 211 arranged on both the pinch rolls 13d and 13u, respectively. May be included. Further, two roll side removing members 200 and 201 may be arranged on the upper pinch roll 13u, and one roll side removing member 20 may be arranged on the lower pinch roll 13d. That is, the number of roll-side removal members 20 arranged on the upper and lower pinch rolls 13d and 13u may be different. Here, the rolling waste adhering to the lower surface of the rolled plate 1 may fall due to its own weight. On the other hand, the rolling debris attached to the upper surface of the rolled plate 1 is not lost except for positive removal. Therefore, it is expected that the configuration including a large number of roll-side removal members 20 arranged with respect to the upper pinch roll 13u can effectively remove the rolling waste adhering to the surface of the rolled plate 1.

  When the work roll arranged closest to the rolling mill 10 is, for example, the deflector roll 15 when the arrangement does not include the pinch roll 13 or when the arrangement order of the work rollers is different, the arrangement is made with respect to the pinch roll 13u. In the same manner as described above, the roll-side removal members 220 and 221 may be disposed with respect to the deflector roll 15. When the manufacturing apparatus 100A includes both the pinch roll 13 and the deflector roll 15, in addition to the pinch roll 13, a roll-side removal member 20 disposed with respect to the deflector roll 15 can be provided. When there are a plurality of work rolls along the traveling direction of the rolled plate 1, in addition to the work rolls arranged in the immediate vicinity of the rolling mill 10, other work rolls, that is, the front of the rolled plate 1 in the traveling direction (winding) For the work roll arranged on the reel 17 side), if the roll-side removal member 20 is arranged, the rolling scraps missed by the latest work roll can be removed. Therefore, since the region where the impressions due to the rolling scraps are formed in the rolled sheet 1 can be reduced, it is expected that the rolled sheet 1 having less large wrinkles and excellent surface properties can be produced longer. The matter described in the case of the deflector roll 15 described above can also be applied to the case where the work roll disposed in the immediate vicinity of the rolling mill 10 is a tension meter roll (not shown).

<Others>
When performing the warm rolling, the manufacturing apparatus 100A stores a reel on which the material plate 1b is wound, a heat box (not shown) that can heat the material plate 1b to a desired temperature, and the rolled plate 1 that travels. It is possible to provide a heat insulating cover for maintaining the temperature. By providing a heat box, a heat insulating cover, etc., the temperature drop of the rolled sheet 1 can be suppressed, and the rollability and ease of winding can be improved.

(Manufacturing procedure of coil material)
In order to manufacture the metal coil material using the manufacturing apparatus 100A having the above configuration, the following process is performed. The material coil material winding the material plate 1b is heated in advance to a predetermined temperature by a heat box or a separately prepared heating means as described above when performing warm rolling.

  The material coil material is attached to the reel for feeding, the material coil material is rewound, and one end of the material plate 1b is wound as it is with the reel 17 for winding (this end is not rolled), the material plate 1b and the rolled sheet 1 subjected to rolling are allowed to travel between both reels. Then, the material plate 1b is sequentially introduced into the rolling mill 10, and rolling by the rolling rolls 10u and 10d is started. As both reels rotate and the material plate 1b travels, the material plate 1b is sequentially rolled into the rolled plate 1. The rolled sheet 1 that has passed through the rolling mill 10 is appropriately adjusted in tension and kept warm by a pinch roll 13 in the middle, bent to an appropriate angle by a deflector roll 15, and finally wound on a reel 17.

  During rolling, the edge of the rolled sheet 1 is cracked to produce rolled debris.Further, the rolled debris adheres to the surface (particularly the upper surface) of the rolled sheet 1 and is sent to the pinch roll 13 with the adhering, finally pinching. Rolled scraps may adhere to the surface of the roll 13. However, in the manufacturing apparatus 100A, the attached rolling scrap comes into contact with the roll-side removal member 20 by the rotation of the pinch roll 13, and is entangled or dammed up. The pinch roll 13 can come into contact with the rolled plate 1 in a region where the rolling scraps are not attached by removing the rolling scraps by the entanglement or damming. Therefore, it can be reduced that the pinch roll 13 presses the rolling scraps against the rolled plate 1 to form a large indentation on the surface of the rolled plate 1. In addition to the upper pinch roll 13u, if the lower pinch roll 13d is also provided with the roll side removing member 20, the formation of large indentations can be reduced on both the upper and lower surfaces of the rolled plate 1. Further, when the deflector roll 15 and the tension meter roll are also provided with the roll-side removal member 20, the number of large indentations that can be formed on the surface of the rolled plate 1 can be further reduced.

  By the above-described winding, a metal coil material in which the long rolled plate 1 is wound is obtained.

  The rolling waste removed (entangled or dammed) by the roll-side removal member 20 is removed at an appropriate time. For example, if it is removed after one pass of rolling is completed, it is easy to prevent the rolling scraps from re-adhering to the rolled plate 1 during removal.

(Material board)
<Composition>
The manufacturing apparatus 100A can be used when various metals are rolled. Examples of the metal to be cold-rolled include steel (including stainless steel), copper, copper alloy, aluminum alloy, and titanium alloy. As a metal which performs warm rolling, a magnesium alloy etc. are mentioned, for example. Note that the rolled plate 1 obtained by rolling the material plate 1b made of a desired metal substantially maintains the composition of the material plate 1b.

  In particular, magnesium alloys containing Al as an additive element: Among Mg-Al alloys, high Al magnesium alloys containing Al in excess of 7.2 mass% are inferior in plastic workability at room temperature, and warm working is desired. . Therefore, the manufacturing apparatus 100A can be suitably used for manufacturing a magnesium alloy coil material made of a high Al magnesium alloy. A high Al magnesium alloy has a high Al content, so that it has excellent corrosion resistance and mechanical properties such as strength and hardness (rigidity). Although the content of Al in the magnesium alloy tends to be excellent in corrosion resistance and mechanical properties as it increases, it exceeds 12% by mass, resulting in a decrease in plastic workability. Is preferred. Additive elements other than Al were selected from Zn, Mn, Si, Be, Ca, Sr, Y, Cu, Ag, Sn, Li, Zr, Ce, Ni, Au, and rare earth elements (excluding Y and Ce) One or more elements are listed. Examples of the content of each element include 0.01% by mass to 10% by mass, and further 0.1% by mass to 5% by mass. In particular, at least one element selected from Si, Sn, Y, Ce, Ca and rare earth elements (excluding Y and Ce) is contained in a total of 0.001% by mass or more, preferably in a total of 0.1% by mass or more and 5% by mass or less. Magnesium alloys are excellent in heat resistance and flame retardancy. Examples of the impurities in the magnesium alloy include Fe.

  More specific compositions of Mg-Al alloys include, for example, AZ alloys (Mg-Al-Zn alloys, Zn: 0.2% to 1.5% by mass), AM alloys (Mg-Al-Mn) according to ASTM standards. Alloy, Mn: 0.15 mass% to 0.5 mass%), AS alloy (Mg-Al-Si alloy, Si: 0.2 mass% to 6.0 mass%), AX alloy (Mg-Al-Ca alloy, Ca : 0.2 mass% to 6.0 mass%), AJ-based alloys (Mg-Al-Sr-based alloys, Sr: 0.2 mass% to 7.0 mass%), and the like. In addition, Mg-Al-RE alloys (RE: rare earth elements, RE: 0.001% by mass to 5% by mass, preferably 0.1% by mass or more) can be used.

  Among Mg-Al alloys, Mg-Al alloys containing Al in the range of 8.3 mass% to 9.5 mass% and Zn in the range of 0.5 mass% to 1.5 mass%, typically Al corresponding to AZ91 alloy and AZ91 alloy, and Magnesium alloys containing Zn (for example, AZX911, etc.) are particularly inferior in plastic workability at about room temperature, and warm rolling is desired. Accordingly, the manufacturing apparatus 100A can be suitably used for manufacturing such a metal coil material made of a magnesium alloy. Since this magnesium alloy is superior in corrosion resistance and mechanical properties among high Al magnesium alloys, by using the material plate 1b made of the magnesium alloy, the surface properties are excellent, and the corrosion resistance and mechanical properties are excellent. Magnesium alloy coil material can be manufactured.

<Form>
As the material plate 1b to be used for rolling, a cast coil material obtained by winding a long cast plate made of a desired metal can be suitably used. The cast coil material is obtained, for example, by producing a long cast plate of a desired metal by a continuous casting method such as a twin roll casting method and winding the cast plate in a spiral shape.

  By using a continuous casting method capable of rapid solidification, for example, in the above-mentioned magnesium alloy (particularly, high Al magnesium alloy), it is possible to reduce oxides and segregation, and to reduce coarse crystal precipitates exceeding 10 μm. Generation can be suppressed. Moreover, the twin roll continuous casting method is excellent in rigidity and thermal conductivity, has little segregation, and can easily form a magnesium alloy cast plate excellent in rolling properties (see Patent Document 2).

  The thickness, width, and length of the cast plate can be appropriately selected. For example, when the thickness is 10 mm or less, and further 5 mm or less, segregation or the like hardly occurs and the strength is excellent. For example, if a long cast plate having a length of 30 m or more, further 100 m or more, or a wide cast plate having a width of 100 mm or more and further 250 mm or more is used as the material plate 1b, a long rolled plate or a wide rolled plate is obtained. Can be made.

  Alternatively, the material plate 1b can be a heat-treated coil material obtained by subjecting the cast coil material to a heat treatment such as a solution treatment. The heat treatment conditions are selected according to the metal species. For example, in the above-mentioned high Al magnesium alloy, heating temperature: 350 ° C. to 420 ° C., holding time: 1 hour to 40 hours can be mentioned. By this heat treatment, precipitates can be dissolved to improve mechanical properties and rollability (see Patent Document 2 for a magnesium alloy). Alternatively, the material plate 1b can be a rolled plate when performing multiple passes of rolling.

(Rolling conditions)
The conditions for rolling by the rolling mill 10 are selected according to the metal type. For example, when performing warm rolling on the above-described high Al magnesium alloy, the condition of the warm rolling is the temperature of the material plate 1b immediately before being supplied to the rolling rolls 10u and 10d: 150 ° C or more and 400 ° C or less (preferably 350 ° C. or lower, 300 ° C. or lower, especially 280 ° C. or lower), and rolling reduction per pass: 5% to 40%. By controlling the rolling conditions according to the metal type (in the above-mentioned high Al magnesium alloy, by setting the above-mentioned specific temperature range), (1) when warm rolling, plastic workability of the material plate 1b (2) Reduces cracking at the edge and reduces the generation of rolling scraps. (3) Increases the rolling reduction per pass (for example, in the above-mentioned high Al magnesium alloy, 10% to 30%) %)), Which can increase the productivity of the coil material, (4) can suppress the deterioration of the surface properties due to seizure, etc. (5) When performing warm rolling, it can suppress the thermal deterioration of the rolling roll. Play. In addition, when performing warm rolling, heating not only the material plate 1b but also the rolling rolls 10u and 10d makes it easy to suppress the temperature drop of the material plate 1b and to further reduce the edge cracks. In addition, cold rolling and warm rolling can be performed using known rolling conditions depending on the metal type (including finish rolling with a low rolling reduction).

  When a lubricant is used for rolling, the friction between the material plate 1b and the rolling rolls 10u and 10d can be reduced, and rolling can be performed satisfactorily. For example, the lubricant may be applied to the rolling rolls 10u and 10d using a brush or a wiper.

  When rolling a plurality of passes, the thickness of the rolled plate 1 is reduced, or the average crystal grain size of the structure constituting the rolled plate 1 is reduced (for example, in the above-described high Al magnesium alloy, 10 μm or less, preferably Can improve plastic workability such as press working. The number of passes, the reduction rate of each pass, and the total reduction rate can be appropriately selected so that a rolled sheet 1 having a desired thickness can be obtained.

  In the above procedure, the case where rolling is performed in one pass has been described. When performing rolling of a plurality of passes, for example, when the above-mentioned two reels are reversed and reverse rolling is performed, the coil material can be manufactured with high productivity. In the case of performing warm rolling, if the heat box described above is used for reverse rolling, it is easy to suppress the temperature drop of the heated material, and the coil material can be manufactured with high productivity.

(Metal coil material)
The metal coil material obtained through the above-described procedure is constituted by the rolled plate 1 wound up in a spiral shape. The thickness, width, and length of the rolled plate 1 can be set to desired values by adjusting the rolling conditions. In particular, when this coil material is used as a material for a plastic working member such as a press working member, a thin plastic working member can be obtained when the thickness is 0.1 mm or more and 2.0 mm or less, particularly 0.3 mm or more and 1.2 mm or less. When the coil material composed of a long plate having a length of the rolled plate 1 of 100 m or more, further 400 m or more is used as a material for the plastic working member, the material can be continuously supplied to the plastic working device. Can be mass-produced. The coil material composed of a wide plate such that the width of the rolled plate 1 is 100 mm or more, and further 250 mm or more is used as a material for the plastic processing member described above, from a small one such as a portable device component to a transportation device component. Plastic working members of various sizes can be manufactured up to large ones.

And the rolling plate 1 which comprises this metal coil material does not have a big indentation. For example, the abundance of indentations having a maximum diameter of 0.5 mm or more satisfies 5 / m ² or less. In other words, even if the rolled plate 1 has indentations, most of them are small indentations having a maximum diameter of less than 0.5 mm. Therefore, indentations can be sufficiently eliminated by light polishing (polishing with a small amount of polishing) such as polishing for producing a metallic luster. A method for measuring the maximum diameter and abundance of the indentation will be described later.

(effect)
The manufacturing apparatus 100A according to the first embodiment winds up the rolled plate 1 obtained by rolling a metal to produce a metal coil material, and even when rolling scraps are generated during rolling and adhere to the surface of the work roll, The rolling scrap is removed from the work roll by the roll side removing member 20. Therefore, the manufacturing apparatus 100A can effectively reduce the fact that the rolling scraps are pressed against the rolled plate 1 by the work rolls to form indentations. Therefore, the obtained metal coil material and the metal plate obtained by cutting this coil material to a predetermined length have few or substantially no indentations and are excellent in surface properties. Further, since there is little or substantially no large indentation, it is not necessary to perform a large amount of polishing in order to eliminate wrinkles or to cut and remove the wrinkles, so that the yield can be reduced. Therefore, by using the manufacturing apparatus 100A, it is possible to manufacture a metal coil material or a metal plate having excellent surface properties with high productivity. And this metal coil material and a metal plate can be suitably used for a material subjected to plastic working such as press working, and a plastic working member having excellent surface properties can be obtained.

[Embodiment 2]
In the first embodiment, the manufacturing apparatus 100A including only the roll-side removal member 20 that removes the rolling scrap attached to the work roll has been described. The manufacturing apparatus 100B of the second embodiment includes a plate-side removal member 30 as shown in FIG. 2 in addition to the roll-side removal member 20, and can also remove rolling scraps attached to the rolled plate 1. Hereinafter, the configuration and effects related to the plate-side removal member 30 will be described in detail, and the detailed description of the same configurations and effects as those of the first embodiment will be omitted.

<Plate side removal member>
The plate-side removal member 30 is a member that removes rolling debris present on the surface of the rolled plate 1 existing between the rolling mill 10 (rolling rolls 10u, 10d) and the nearest work roll (here, the pinch roll 13). It is. The basic configuration of the plate-side removal member 30 is the same as that of the roll-side removal member 20, and is arranged so as to be in sliding contact with the surface of the rolled plate 1 and supports the dam portion 31 that removes rolling scraps. A support portion 33;

  The constituent material of the weir part 31 is, for example, a felt or a resin molded body, like the weir part 21 included in the roll-side removal member 20. Examples of the form of the dam portion 31 include a columnar wiper, a plate scraper, and a wiping roll (in FIG. 2, a prismatic wiper is shown). In particular, since the weir portion 31 included in the plate-side removal member 30 is in direct contact with the rolled plate 1, it is preferable that the portion in contact with the rolled plate 1 is made of at least a soft material such as felt. When the weir portion 31 is made of a soft material such as felt, the rolling waste entangled by the weir portion 31 is not substantially pressed against the rolled plate 1 and the rolled plate 1 is difficult to be wrinkled.

When the dam portion 31 is a columnar wiper, a straight shape such as a general prism or cylinder is considered preferable. For example, when the columnar wiper has a V shape or a bow shape in a plan view and is directed to the downstream side (forward in the traveling direction) of the rolled plate 1 traveling on the convex side of the V shape or the convex side of the bow, the rolling scraps of the weir portion 31 Collected in one part and stored. However, if the rolling scraps are excessively concentrated on a part of the rolled plate 1, there is a possibility that the rolled plate 1 is wrinkled by the accumulated rolling scraps. When the weir portion 31 is a plate-shaped scraper, it is made of resin or the like, and has a V shape or a bow shape in plan view, with the convex side of the V shape or the convex side of the bow facing backward in the traveling direction of the rolled plate 1 Thus, it is expected that the rolling scraps in contact with the convex surface can be dropped to the outside of the rolled plate 1. In this case, the width W ₃₀ (described later) of the plate scraper can be increased to some extent so that the rolling scraps can easily fall. When reverse rolling is performed in this embodiment, the direction of the convex side is reversed each time the traveling direction of the rolled sheet 1 changes.

The width W ₃₀ of the weir part 31 is preferably shorter than the width W ₁ of the rolled plate 1. The width means the length along the axial direction of the work roll (the length in the vertical direction in FIG. 2B). As described above, at the edge of the rolled plate 1 that has passed through the rolling mill 10, there may be rolling scraps due to cracking. Therefore, placing the dam portion 31 over the entire width of the rolled plates 1, i.e., if the width W ₃₀ of the dam portion 31 and equal to or more than the width W ₁ of the rolled plate 1, entwined taking or rolling scraps or dammed There is a possibility that the rolling plate 1 is wrinkled by the accumulated rolling scraps or the rolling scraps are scattered around. Further, when the edge of the rolled sheet 1 is trimmed and removed after rolling, it is acceptable to some extent that the edge is wrinkled. Therefore, in order to prevent the intensive rolling debris edge of the weir portion 31 is attached, the width W ₃₀ of the dam portion 31, shorter than the width W ₁ of the rolled plate 1, and this short dam It is preferable that 31 is disposed so as not to include the edge portion of the rolled plate 1 and to be located only in the central portion of the rolled plate 1 (see FIG. 2 (B)). In this case, a region where the dam portion 31 is not arranged in the rolled plate 1: the width W _{e of the} edge portion is about 3 mm to 20 mm.

  The support part 33 has a configuration that fixes the arrangement position of the dam part 31 so as not to fluctuate similarly to the support part 23 provided in the roll-side removal member 20, a dam part for the rolled plate 1 with a compression spring, a cylinder, and the like. A configuration in which the pressing force of 31 can be adjusted, a configuration in which it is suspended by its own weight, and the like can be adopted. As described above, since the weir portion 31 is in direct contact with the rolled plate 1, if the latter pressing force is adjustable, the pressing force on the rolled plate 1 can be prevented from becoming excessively large. Therefore, it is preferable that the rolled plate 1 can be prevented from being wrinkled by the plate side removing member 30 (weir portion 31).

  As the arrangement position of the plate-side removal member 30, an arbitrary position between the rolling mill 10 and the nearest work roller can be selected. The number of plate-side removal members 30 may be one as shown in FIG. 2, but a plurality of plate-side removal members 30 may be provided. The manufacturing apparatus 100B can include, for example, plate-side removal members 300 and 301 arranged in parallel so as to be lined up and down along the traveling direction of the rolled plate 1. In this case, for example, when removing the rolling scraps entangled or dammed by the plate removal member 300 on one side (upstream side in the traveling direction of the rolled plate 1), the other side (on the downstream side) is removed. Rolls can be entangled or dammed by the member 301. Further, when removing the rolling scraps entangled or dammed by one plate-side removal member 300, the other plate-side removal member 301 may be disposed. That is, the plurality of plate-side removal members 30 may be arranged only at a specific time such as when the plate-side removal member 30 is replaced. Alternatively, in the example shown in FIG. 2 (A), the manufacturing apparatus 100B includes the plate-side removal member 300 disposed only on the upper surface of the rolled plate 1, but the plate side disposed with respect to the lower surface of the rolled plate 1 The removing member 310 may be provided, or the plate-side removing members 300 and 310 disposed on both surfaces of the rolled plate 1 may be provided. Further, for the same reason as the roll-side removal member 20, the number of plate-side removal members 30 arranged on the upper and lower surfaces of the rolled plate 1 may be different. Furthermore, when the plate-side removal member 30 is disposed on both surfaces of the rolled plate 1, if the rolled plate 1 is sandwiched by the plate-side removal member 30, there is a risk that excessive pressing force may act on the rolled plate 1. It is preferable that the arrangement position of the plate-side removal member 30 arranged on the upper surface of the plate 1 and the arrangement position of the plate-side removal member 30 arranged on the lower surface of the rolled plate 1 are shifted along the traveling direction of the rolled plate 1, respectively. .

(Manufacturing procedure of coil material)
The procedure for manufacturing the metal coil material using the manufacturing apparatus 100B including both the roll-side removal member 20 and the plate-side removal member 30 is the same as that of the first embodiment. However, at the time of rolling, in addition to the removal of rolling waste from the work roll by the roll-side removal member 20, the rolling waste from the rolled plate 1 is removed by the plate-side removal member 30. As described above, the rolling scraps removed by the roll side removing member 20 and the plate side removing member 30 (entangled or dammed) may be removed, for example, for each pass.

(effect)
The manufacturing apparatus 100B of Embodiment 2 rolls a rolled plate obtained by rolling a metal to manufacture a metal coil material, and rolling scraps are generated during rolling on the surface of the rolled plate 1 or the surface of the work roll. Even when it adheres, it has a multi-stage removal structure in which the rolling scrap is removed from the rolled plate 1 by the plate-side removing member 30, and the rolling scrap is removed from the work roll by the roll-side removing member 20. Since the manufacturing apparatus 100B can remove the rolling scraps that can be conveyed to the work roll side by the plate-side removal member 30, it can reduce the rolling scraps that can adhere to the roll-side removal member 20 itself. Therefore, in this manufacturing apparatus 100B, it is possible to more effectively reduce the rolling scraps from being pressed against the rolled plate 1 by work rolls to form indentations. The metal coil material or metal plate obtained by the manufacturing apparatus 100B has fewer or substantially no large indentations, and is superior in surface properties. Further, by using this manufacturing apparatus 100B, a metal coil material or a metal plate having excellent surface properties can be manufactured with higher productivity. And this metal coil material and a metal plate can be used suitably for the raw material of a plastic working member, and also a plastic working member having better surface properties can be obtained.

[Test example]
A metal coil material was manufactured using the metal coil material manufacturing apparatuses 100A and 100B of Embodiments 1 and 2 described above, and the surface properties were examined.

  In this test, a molten magnesium alloy with a composition equivalent to AZ91 alloy (Mg-8.7% Al-0.65% Zn, all by mass%) was prepared, and a 4mm thick cast plate was continuously produced by a twin roll caster. It produced and wound up and produced the cast coil material. The cast coil material was charged into a batch furnace and subjected to a solution treatment at 400 ° C. for 24 hours. The obtained solid solution coil material was used as a material coil material, and a plate material obtained by subjecting a material plate obtained by rewinding the material coil material to warm rolling of a plurality of passes under the following conditions was wound up. By the above process, a rolled coil material made of a rolled plate having a thickness of 0.6 mm, a width of 250 mm, and a length of 760 m was produced. Each of the manufacturing apparatuses 100A and 100B includes, as one of the work rollers, a heat-retaining pinch roller (a pair of sets arranged so as to sandwich the rolling plate), and the pinch roller is used for winding from the rolling roller. Among the work rollers arranged between the reels, the work roller was arranged at a position closest to the rolling roller. That is, this pinch roller is the latest work roller.

(Rolling conditions)
Reduction ratio: 5% / pass to 40% / pass Heating temperature of material plate: 250 ° C to 280 ° C
Rolling roll temperature: 100 ℃ ~ 250 ℃

  In sample No. 1 using the manufacturing apparatus 100A, a commercially available columnar felt was prepared. A roll side removal member having a weir portion made of this columnar felt (columnar wiper) was prepared. Then, the roll-side removal member was disposed so that the weir portion was in sliding contact with the surface of the uppermost nearest work roller (here, pinch roller), and the above-described multiple passes of rolling were performed. Moreover, the rolling waste entangled by the weir part for each pass was removed.

In sample No. 2 using the manufacturing apparatus 100B, a roll-side removal member having a felt columnar wiper similar to that of sample No. 1 was prepared. Also, a commercially available columnar felt was prepared, and a plate-side removal member having a weir portion made of this columnar felt (columnar wiper) was also prepared. In Sample No. 2, as in Sample No. 1, a roll-side removal member is arranged so that the weir portion is in sliding contact with the surface of the upper most recent work roller (here, pinch roller), and the work closest to the rolling mill is performed. The plate-side removal member was disposed so that the weir portion was in sliding contact with the upper surface of the rolled plate existing between the rollers, and the above-described multiple passes of rolling were performed. Width W ₃₀ of the weir portion comprising a plate-side removal member is smaller than the width W ₁ of the rolled plate, the weir portion is disposed a plate-side removing member so as not to contact the edge of the rolled plate. Moreover, the rolling waste entangled by the weir portion of each removing member was removed for each pass.

  In Sample No. 100, the above-described multiple passes of rolling were performed without arranging both the roll-side removal member and the plate-side removal member.

The surface properties of the prepared metal coil materials (here, magnesium alloy coil materials corresponding to AZ91 alloy) were examined as follows. The coil material after rolling is rewound, and a 300 mm long plate piece is cut out from the outer periphery of the coil material. Every time 95 plate pieces were cut out, the following 5 plate pieces were taken out as evaluation samples and repeated. Then, the number of indentations (hereinafter referred to as coarse indentations) having a maximum diameter of 0.5 mm or more was counted for the evaluation samples. Here, the impression was investigated about both surfaces of each sample for evaluation. In addition, since the shape of an indentation is an irregular shape, the largest length in each indentation was made into the maximum diameter. Then, the number of coarse indentations per 1 m ² was determined using 100 or more evaluation samples (125 in this case). As a result, sample No. 100 has a maximum diameter of 0.5 mm or more and the presence of indentations is 20 / m ² , whereas sample No. 1 and No. 2 both have a maximum diameter of 0.5 mm. The abundance of the above indentations was 5 pieces / m ² or less, and there were few large wrinkles. In particular, sample No. 2 in which the rolling scrap was removed from both the work roll and the rolled plate using the manufacturing apparatus 100B including both the roll side removing member and the plate side removing member has a maximum diameter of 0.5. The presence of indentations greater than or equal to mm is 3 pieces / m ² , and larger wrinkles are reduced than sample No. 1 (5 pieces / m ² ) using manufacturing apparatus 100A having only the roll-side removal member. It was.

  In sample No.1, when a roll-side removal member is added to the lower pinch roll, and in sample No.2, a plate-side removal member is added to the lower surface of the rolled plate, respectively. The surface properties were examined. As a result, there was obtained a metal coil material (magnesium alloy coil material in this case) having few large wrinkles on both the upper and lower surfaces of the wound rolled plate and having excellent surface properties.

  From the above test results, when producing a metal coil material by rolling a metal such as a magnesium alloy for one pass or more, the rolling debris that can adhere to the work roller disposed at the position closest to the rolling roller is removed. Thus, it was confirmed that a large coil can be reduced and a metal coil material having excellent surface properties can be obtained. Moreover, in addition to the removal of rolling scraps from the work roller, it is possible to further reduce large wrinkles by removing the rolling scraps from the rolled plate, and to obtain a high-quality metal coil material with excellent surface properties. confirmed.

  In addition, this invention is not limited to embodiment mentioned above, In the range which does not deviate from the summary of this invention, it can change suitably. For example, the material, arrangement position, number, metal type, thickness, width, length, etc. of the rolled plate can be appropriately changed.

  The metal coil material manufacturing apparatus of the present invention can be suitably used for manufacturing a metal coil material that is a material of a plastic working member that is subjected to various plastic processing such as pressing, forging, bending, and upsetting. .

1 Rolled plate 1b Material plate 100A, 100B Metal coil material manufacturing equipment
10 Rolling machine 10u, 10d Rolling roll 13,13u, 13d Pinch roll
15 Deflector roll 17 reel
20,200,201,210,211,220,221 Roll side removal member
21,31 Weir part 23,33 Support part 30,300,301,310 Plate side removal member

Claims (8)

A metal coil material manufacturing apparatus comprising a rolling roll for rolling metal, and a reel that winds a rolled plate obtained by rolling,
Arranged between the rolling roll and the reel, at least one work roll that contacts the rolling plate and performs a predetermined action on the rolling plate;
An apparatus for producing a metal coil material, comprising: a roll-side removal member that removes rolling scraps attached to the surface of the nearest work roll disposed at a position closest to the rolling roll among the work rolls.   2. The plate-side removal member that is disposed between the rolling roll and the nearest work roll, and that removes rolling scraps attached to at least one of the upper surface and the lower surface of the rolled plate existing therebetween. Metal coil material manufacturing equipment.   The latest work roll is any one of a pinch roll for adjusting the tension applied to the rolled sheet, a deflector roll for changing a winding angle of the rolled sheet, and a tension meter roll for measuring a tension distribution applied to the rolled sheet. 3. The apparatus for producing a metal coil material according to claim 1, wherein the number is one.   4. The apparatus for producing a metal coil material according to claim 1, wherein at least a portion of the roll-side removal member that is in contact with the latest work roll is formed of felt.   3. The apparatus for producing a metal coil material according to claim 2, wherein the plate-side removal member has at least a portion that contacts the rolled plate formed of felt.   6. The metal coil material manufacturing apparatus according to claim 1, wherein the removing member includes a plate scraper or a wiping roll.   7. The apparatus for producing a metal coil material according to claim 1, wherein the metal is a magnesium alloy.   8. The apparatus for producing a metal coil material according to claim 7, wherein the magnesium alloy contains Al in excess of 7.2 mass%.

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