JP2016182624A - Rolling control device and rolling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling control device and a rolling device capable of making a uniform aluminum alloy composition and improving a yield.SOLUTION: A rolling control device according to an embodiment controls a rolling device for rolling an aluminum-containing material to be rolled by engaging the material between upper and lower rolling rolls disposed vertically. This reverse rolling control device comprises: a process control unit that sets a rolling amount of the material to be rolled and sets a height from a reference surface of a pass line formed on a lower surface of the material to be rolled on the basis of the rolling amount; and a feed roller height control unit that sets a height of each feed roller transporting the material to be rolled along the pass line in such a manner that a center, in a thickness direction of, the material to be rolled matches a center between rotational axes of the rolling rolls.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a rolling control device and a rolling device.

  In an aluminum hot rolling apparatus, a plurality of table rollers and a plurality of feed rollers are arranged along the conveying direction of the rolled material, and the rolled material is conveyed to the position of the rolling mill by rotating these rollers. . The conveyed rolled material is rolled by being caught in a roll gap that is a gap between the work rolls of the rolling mill arranged above and below, and discharged to the opposite side across the rolling mill from the conveyed side. The After the rolled material is discharged from the rolling mill, the plurality of table rollers, the plurality of feed rollers, and the work roll of the rolling mill rotate in opposite directions, and the rolled material is again caught in the roll gap of the rolling mill and rolled. And discharged from the rolling mill. In the reverse hot rolling facility, the rolled material is rolled to a desired thickness by repeating such a reciprocating process.

  A virtual transport surface of the rolled material formed by the rolling material placement surface when the rolled material is placed on the plurality of table rollers and the plurality of feed rollers is referred to as a pass line. In general, in an aluminum hot rolling facility, a pass line is set horizontally on a floor as a reference surface, and the height of the pass line from the reference surface is fixed. And a pass line is set to the height substantially the same as the height of the lower side of a roll gap so that a rolling material may be discharged | emitted smoothly from a rolling mill.

JP-A-11-169923

  When the height of the pass line is at the lower side of the roll gap and the rolled material enters the rolling mill, the upper part of the rolled material hits the upper side of the roll gap. It becomes impossible to enter the rolling mill in a horizontal state. In the case of a pass line having such a fixed height, in the rough rolling step before the finish rolling step, the thickness of the rolled material is as very large as about 300 mm to 600 mm. There is a tendency for the deviation of the entry angle of the material to increase. Further, since the thickness of the rolled material changes every time it passes through a series of steps that pass through the rolling mill and is discharged, the angle of entry into the roll gap of the rolling mill changes for each pass. Therefore, it becomes difficult to apply the pressure of a work roll uniformly along the conveyance direction of a rolling material, and the composition of the aluminum alloy after rolling and the enlargement of a crop arise.

  Patent Document 1 discloses a technique for adjusting a fluctuation in the height of a pass line to a constant value due to a change or variation in the diameter of a lower work roll when the work roll is exchanged, regarding a steel material rolling apparatus. Yes. However, this is to manually adjust the position of the work roll, and does not control the height of the pass line for each pass of the rolling process. Therefore, even if this mechanism is applied to an aluminum hot rolling facility, it is not possible to achieve a uniform aluminum alloy composition.

  An object of the embodiment is to provide a rolling control device and a rolling device that improve the uniformity and yield of aluminum after rolling or an alloy composition containing aluminum.

  The rolling control device according to the embodiment controls a rolling device that bites and rolls a rolled material containing aluminum into rolling rolls arranged above and below. The reverse rolling control device sets a rolling amount of the rolled material, and sets a height from a reference plane of a pass line formed on the lower surface of the rolled material based on the rolling amount, and Based on the command from the process control unit, the feed that conveys the rolled material along the pass line so that the center line in the thickness direction of the rolled material matches the center line between the rotation axes of the rolling rolls. A feed roller height control unit for setting the height of the roller.

  In the rolling control device and the rolling device according to the embodiment, since the height of the pass line is set so as to match the center of the thickness of the rolled material and the center of the rotation axis of the upper and lower rolling rolls, the rolling material is rolled up and down. The roll pressure is applied uniformly. Therefore, the rolling control device and the rolling device according to the embodiment can improve the uniformity and yield of the rolled material after rolling.

It is a block diagram which illustrates the reverse rolling control apparatus and reverse rolling apparatus which concern on 1st Embodiment. Fig.2 (a) is a front view which shows typically the shape of the feed roller of the reverse rolling apparatus of FIG. 2B and 2C are front views schematically showing another example of the shape of the feed roller. It is a typical side view of the reverse rolling apparatus for demonstrating operation | movement of the reverse rolling control apparatus which concerns on 1st Embodiment. FIG. 4A and FIG. 4B are block diagrams illustrating a reverse rolling control apparatus according to the second embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between the parts, and the like are not necessarily the same as actual ones. Further, even when the same part is represented, the dimensions and ratios may be represented differently depending on the drawings.
Further, in the present specification and each drawing, the same reference numerals are given to the same elements as those described above with reference to the previous drawings, and detailed description thereof will be omitted as appropriate.

(First embodiment)
FIG. 1 is a block diagram illustrating a reverse rolling control device and a reverse rolling device according to this embodiment.
FIG. 2A to FIG. 2C are front views schematically showing examples of the shape of the feed roller of the reverse rolling apparatus of FIG.
FIG. 3 is a schematic side view of the reverse rolling apparatus for explaining the operation of the reverse rolling control apparatus according to the present embodiment.
As shown in FIG. 1, the reverse rolling control device 100 of the present embodiment includes a process control computer 20 and a feed roller height control unit 35. The reverse rolling control apparatus 100 further includes a rolling / conveying controller 30, a rolling roll rotation control unit 32, a rolling roll reduction control unit 33, a feed roller rotation control unit 34, and a table roller rotation control unit 36. The reverse rolling control device 100 controls the reverse rolling device 10 that performs hot rolling of the rolled material 1 of aluminum or an alloy containing aluminum. First, the configuration of the reverse rolling apparatus 10 will be described.

  The reverse rolling apparatus 10 includes a rolling mill 12, a plurality of feed rollers 16, and a plurality of table rollers 18. The rolling mill 12 has work rolls 13a and 13b arranged vertically. The work rolls 13a and 13b are steel cylinders having substantially the same diameter, and rotate around a rotation axis passing through the center of a circle of the cylinder. The work rolls 13a and 13b are arranged vertically apart from each other in the vertical direction with respect to the reference surface 6 so that the respective rotation axes are parallel to each other. A roll gap g which is the shortest distance between the cylindrical surfaces of the upper and lower work rolls 13a and 13b is set as a target thickness of the rolled material 1 after one rolling. A backup roll 14a is disposed above the upper work roll 13a, and a backup roll 14b is disposed below the lower work roll 13b. The outer circumferences of the upper and lower backup rolls 14a and 14b are in contact with the outer circumferences of the upper and lower work rolls 13a and 13b. The backup rolls 14a and 14b may roll the rolled material 1 after rolling to about 50% of the thickness of the rolled material 1 before rolling. To be provided. The work rolls 13a and 13b and the backup rolls 14a and 14b are accommodated in a housing case 15 having sufficient strength.

  The reverse rolling apparatus 10 is installed, for example, with the floor surface as the reference surface 6. The lower end of the housing case 15 is fixed to the floor surface. In the housing case 15, the rotating shaft of the lower work roll 13 b is fixed at a certain height from the reference surface 6. The position of the rotating shaft of the upper work roll 13 a is movable up and down within the housing case 15. The roll gap g of the work rolls 13a and 13b is set to the thickness after rolling of the rolled material 1 by moving the rotation axis of the work roll 13a up and down. The rolling mill 12 is disposed, for example, near the center of the pass lines 4a and 4b.

  A plurality of feed rollers 16 are arranged so that the rotation axis of the feed roller 16 is substantially parallel along the reference surface 6. The plurality of feed rollers 16 are spaced apart from each other by a certain distance so that their rotation axes are substantially perpendicular to the extending direction of the pass lines 4a and 4b. On the feed roller 16, the rolled material 1 is placed. The feed roller 16 rotates about the rotation axis to convey the rolled material 1 placed thereon to the rolling mill 12 along the pass lines 4a and 4b. Further, the feed roller 16 conveys the rolled material 1 discharged from the rolling mill 12 along the pass lines 4 a and 4 b to the opposite side of the rolling mill 12 so as to be discharged from the rolling mill 12.

  The pass lines 4a and 4b refer to virtual transport surfaces formed by the lower surface of the rolled material 1 that is placed on the feed roller 16 and transported. The rolled material 1 is conveyed on the feed roller 16 along the pass lines 4a and 4b.

  As with the feed roller 16, the table roller 18 has a plurality of rotational axes of the table roller 18 arranged substantially parallel to the reference plane 6, and the rotational axes are substantially perpendicular to the extending direction of the pass lines 4a and 4b. So as to be spaced apart by a certain distance. The table roller 18 is disposed at a position farther from the rolling mill 12 than the position at which the feed roller 16 is disposed. While the feed roller 16 conveys the rolled material 1 at the set rolling speed in cooperation with the rotation operations of the upper and lower work rolls 13a and 13b and the backup rolls 14a and 14b of the rolling mill 12, the table roller 18 Simply conveys the rolled material 1 on the pass lines 4a and 4b. In order to improve the throughput of the rolling process, the table roller 18 can rotate at a speed higher than that of the feed roller 16 to convey the rolled material 1.

  The feed roller 16 and the table roller 18 are made of a material having high rigidity such as steel from the viewpoint of ensuring strength such as wear resistance. On the other hand, aluminum or its alloy as the rolled material 1 is softer than the materials of the feed roller 16 and the table roller 18, and the surface is easily damaged. If the rolled material 1 having a scratched surface is rolled, non-uniformity is caused by subsequent rolling. Therefore, it is necessary to prevent the placement surface of the rolled material 1 from contacting the feed roller 16 and the table roller 18 as much as possible. is there. For example, as shown in FIG. 2A, the feed roller 16 and the table roller 18 are drum-shaped cylinders whose centers are constricted such that the diameters of the circles decrease from the both end portions along the rotation axis toward the center. I am making a body. Since the rolled material 1 is placed and conveyed on a drum-shaped roller, the placement surface of the rolled material 1 does not contact the cylindrical surface of the roller. The rolled material 1 is supported by edges along the conveying direction of the rolled material 1. Note that the shapes of the feed roller 16 and the table roller 18 are not limited to the drum-shaped cylindrical body constricted linearly as shown in FIG. The shape of the feed roller and the table roller may be any shape that does not contact the cylindrical surface of the feed roller and the table roller when the rolled material 1 is placed. For example, the shape of the feed roller and the table roller may be cylindrical bodies 116 and 118 having a single hyperbolic rotation surface as shown in FIG. 2B, and as shown in FIG. The biaxial rollers 216 and 218 may be composed of two rotating shafts and arranged at an angle θ from the respective end portions toward the center.

  Since the feed roller 16 and the table roller 18 have a drum-like constricted cylindrical shape in this way, when the rolled material 1 is placed, the pass line 4a is set according to the width of the rolled material 1. , 4b changes. Even if it is the same rolling material 1, since the width | variety of the rolling material 1 becomes wide, so that a pass is repeated and rolling progresses, the height of the pass lines 4a and 4b also becomes high for every pass. For example, in the case of the rolled material 1a that is widened by rolling the rolled material 1, the height of the pass line 4c of the rolled material 1a is higher by Δ than the pass lines 4a and 4b of the rolled material 1. Become.

  Returning to FIG. 1 again, the reverse rolling apparatus 10 transports the rolled material 1 to the rolling mill 12 by the feed roller 16 and the table roller 18, and is set by the work rolls 13a and 13b and the backup rolls 14a and 14b. Roll to thickness.

  In FIG. 1, two feed rollers 16 and two table rollers 18 are arranged on the pass lines 4a and 4b in order to avoid the complexity of the illustration. It goes without saying that it is not limited. The number of feed rollers 16 and table rollers 18 to be arranged is appropriately set according to the length of the rolled material 1 and the interval at which the rollers are arranged is also set appropriately.

  A heating furnace 8 is installed at one end of the pass line 4a farthest from the rolling mill 12. In the heating furnace 8, the slab of aluminum or an alloy containing aluminum is heated to a high temperature of about 500 ° C. to 600 ° C., and the rolled material 1 that has reached a predetermined temperature is sequentially put into the reverse rolling apparatus 10. . A shear shear 9 is disposed at the other end of the pass line 4b. The shear shear 9 cuts both ends of the rolled material 1 which has been rolled and deformed into a burr before passing through a plurality of passes and transporting to the next finishing rolling device.

  Hereinafter, the pass line on the heating furnace 8 side from the rolling mill 12 may be referred to as an input-side pass line 4a, and the pass line 4 on the shearing shear 9 side may be referred to as an exit-side pass line 4b. The reference numerals of the feed roller and the table roller arranged on the side of the pass line 4a are hereinafter referred to as 16a and 18a, respectively. The reference numerals of the feed roller and the table roller arranged on the pass line 4b side are 16b and 18b, respectively.

  In the rolling process of aluminum and its alloys, the reverse rolling apparatus 10 operates as follows. That is, the rolled material 1 is conveyed on the entrance side pass line 4a toward the rolling mill 12, rolled by the rolling mill 12, and discharged onto the exit side pass line 4b. Such a single rolling process is called a pass. Next, the roll gap g between the upper and lower work rolls 13a and 13b of the rolling mill 12 is set to the rolling thickness of the next pass. The rolling thickness of each pass is calculated and set by a process control computer 20 described later. Thereafter, the table rollers 18a and 18b, the feed rollers 16a and 16b, the work rolls 13a and 13b, and the backup rolls 14a and 14b rotate in the reverse direction, and the rolled material 1 is conveyed toward the rolling mill 12 on the pass line 4b. Then, it is rolled to the rolling thickness of the pass by the rolling mill 12 and discharged to the entrance pass line 4a. The rolled material 1 is discharged to the exit-side pass line 4b by repeating the above-described pass an odd number of times until the set thickness is reached. The rolled material 1 that has finished the above-described rough rolling process is transported to the tip of the exit pass line 4b, is subjected to a cutting process by a shear shear 9, and is transported to the next process (not shown), for example, a finish rolling process. Is executed.

  Next, the reverse rolling control apparatus 100 will be described. As shown in FIG. 1, the reverse rolling control device 100 is connected to a process control computer (process control unit) 20 via a rolling / conveying controller 30. In the reverse rolling control apparatus 100, the process control computer 20 determines the rolling roll rotation control unit 32, the rolling roll reduction control unit 33, the feed roller rotation control unit 34, the feed roller height control unit 35, and the table according to the calculation result. The roller rotation control unit 36 is controlled.

  The process control computer 20 includes a rolling calculation unit 22 and a pass line calculation unit 24. The process control computer 20 is connected to a higher-level production management computer (not shown) via the network 50. In the production management computer, parameters relating to the production plan, production quantity, raw material quality, etc. of each type of aluminum material are aggregated, and execution of each production plan is instructed. The process control computer 20 receives, from the production management computer, raw material parameters, manufacturing parameters, and the like of the aluminum material to be produced. The rolling calculation unit 22 sets the first pass and the rolling amount for each pass based on these raw material parameters and manufacturing parameters, and calculates the conveying speed of the rolled material 1, the rolling amount of the rolling mill 12, and the like. The pass line calculation unit 24 sets the heights of the pass lines 4 a and 4 b for each pass based on the raw material parameters, the material parameters, and various quantities calculated by the rolling calculation unit 22.

  The rolling / conveying controller 30 is connected to the process control computer 20 via the network 52, and receives various amounts calculated by the rolling calculation unit 22 and the pass line calculation unit 24 via the network 52. The rolling / conveying controller 30 includes a rolling roll rotation control unit 32, a rolling roll reduction control unit 33, a feed roller rotation control unit 34, a feed roller height, according to various amounts calculated by the rolling calculation unit 22 and the pass line calculation unit 24. An appropriate command is transmitted to the height control unit 35 and the table roller rotation control unit 36. The network 52 may be connected to a controller for another rolling device, for example, a finish rolling device.

  The rolling roll reduction control unit 33 sets the vertical position from the reference surface 6 of the work roll 13 a and the backup roll 14 a on the upper side of the rolling mill 12. The rolling roll reduction control unit 33 moves the upper work roll 13a and the backup roll 14a to the set positions, and sets the pressure when the rolled material 1 is caught, that is, the reduction amount. The rolling roll reduction control unit 33 moves a work roll 13a and a backup roll 14a, and controls a mechanical drive system such as a motor for applying pressure and a control circuit and a drive circuit for driving the mechanical drive system. Is included. The vertical positions of the lower work roll 13b and the backup roll 14b from the reference plane 6 are fixed. The upper work roll 13a and the backup roll 14a are set at appropriate positions from the reference surface 6 by the rolling roll reduction control unit 33, and a roll gap g for biting the rolled material 1 is set.

  In the upper and lower work rolls 13a and 13b and the backup rolls 14a and 14b, the rolling roll rotation control unit 32 sets the rotation direction and rotation speed of the upper and lower rolls, and the respective work rolls 13a and 13b are rotationally driven. The rolling roll rotation control unit 32 includes a mechanical drive system such as a motor for driving the work rolls 13a and 13b and the backup rolls 14a and 14b, and a control circuit and a drive circuit for driving the mechanical drive system. Contains. The rolling roll rotation control unit 32 may be configured to directly drive the upper and lower work rolls 13a and 13b, or may drive the work rolls 13a and 13b via the upper and lower backup rolls 14a and 14b. . Further, the work rolls 13a and 13b and the backup rolls 14a and 14b may be driven in cooperation.

  The feed roller rotation control unit 34 rotates the feed rollers 16 a and 16 b arranged so as to form the pass lines 4 a and 4 b at a constant speed, and conveys the rolling material 1 placed on the upper part to the rolling mill 12. To do. The feed roller rotation control unit 34 includes a mechanical drive system such as a motor that controls the rotation speed of each of the plurality of feed rollers 16a and 16b to be constant, and a control circuit and a drive circuit for driving the mechanical drive system. Including.

  The feed roller height control unit 35 sets the vertical height from the reference surface 6 on which the feed rollers 16a and 16b are arranged, and moves the feed rollers 16a and 16b to that height. The plurality of feed rollers 16a and 16b having a set height form new pass lines 4a and 4b at the height. The feed roller height control unit 35 can set the height of the incoming pass line 4a different from the height of the outgoing pass line 4b. The height of the incoming pass line 4a is set by controlling the height of the feed roller 16a disposed on the pass line 4a side. The height of the outgoing pass line 4b is set by controlling the height of the feed roller 16b disposed on the pass line 4b side. The feed roller height control unit 35 may be configured such that the height of the incoming pass line 4a and the height of the outgoing pass line 4b can be set to the same height. The feed roller height control unit 35 includes a mechanical drive system such as a motor or an actuator that moves the feed rollers 16a and 16b to a set height, and a control circuit and a drive circuit for driving the mechanical drive system. Including. A mechanical drive system and a control circuit and a drive circuit for controlling and driving them are prepared for setting the height of the incoming pass line 4a and setting the height of the outgoing pass line 4b, respectively.

  The table roller rotation control unit 36 controls the rotation speed of the table rollers 18a and 18b to be constant. The table roller rotation control unit 36 includes a mechanical drive system such as a motor for rotating the table rollers 18a and 18b, and a control circuit and a drive circuit for driving the mechanical drive system.

  The rolling / conveying controller 30 is a controller of a programmable logic controller (hereinafter also referred to as PLC), for example. The rolling roll rotation control unit 32, the rolling roll reduction control unit 33, the feed roller rotation control unit 34, the feed roller height control unit 35, and the table roller rotation control unit 36 are, for example, PLC input / output devices. In the rolling roll rotation control unit 32, the rolling roll reduction control unit 33, the feed roller rotation control unit 34, the feed roller height control unit 35, and the table roller rotation control unit 36, control circuits for controlling respective drive systems. In addition, a drive circuit such as a motor may be physically separated, and the control circuit, the drive circuit, and the drive system may be physically separated from each other.

Operation | movement of the reverse rolling control apparatus 100 of this embodiment is demonstrated below.
The rolled material 1 is heated to about 500 ° C. to 600 ° C. in the heating furnace 8. The heated rolled material 1 is placed on the table roller 18a and put into the reverse rolling process.

  The rolling calculation unit 22 calculates the rolling mill reduction amount in the first pass. Based on the calculated amount of reduction, the roll gap g is set, and the distance between the rotation axes of the work rolls 13a and 13b is set. Then, the upper work roll 13 a is moved to a set position by the rolling roll reduction control unit 33. The rolling calculation unit 22 sets the conveyance direction and conveyance speed of the rolled material 1.

  Subsequently, the height from the reference surface 6 of the feed roller 16a is calculated by the pass line calculation unit 24 based on the thickness data of the rolled material 1 in the first pass and the calculated roll gap g data. . Here, the height of the pass line 4a is set so that the center line C1 of the thickness of the rolled material 1 coincides with the center line C2 between the rotation axes of the work rolls 13a and 13b. The pass line height control unit 35 moves the feed roller 16a on the pass line 4a side to a set height. The position of the center line C2 may be calculated and set according to the length of the roll gap g set by the work rolls 13a and 13b.

  In the first pass, the height of the pass line 4b from which the rolled material 1 is rolled and discharged is set by the pass line calculation unit 24 to coincide with the height of the lower side g1 of the roll gap g. The pass line height control unit 35 moves the feed roller 16b on the pass line 4b side to a set height.

  The table roller rotation control unit 36 and the feed roller rotation control unit 34 are transported in the transport direction calculated by the rolling calculation unit 22, that is, from the entry-side pass line 4a to the rolling mill 12, and from the rolling mill 12 to the exit side pass line. The roller is rotated in the direction toward 4b.

  The feed rollers 16a and 16b roll the rolled material 1 by rotating the rollers at the rolling speed calculated by the rolling calculation unit 22 in cooperation with the work rolls 13a and 13b.

  After the rolled material 1 is completely discharged from the rolling mill 12, the setting of each control unit is updated for the next pass.

  Similarly to the first pass, the rolling calculation unit 22 calculates the rolling mill reduction amount in the second pass, sets the roll gap g based on the calculated reduction amount, and rotates the rotation axes of the work rolls 13a and 13b. The distance between is set. According to these set values, the rolling roll reduction control unit 33 moves the position of the upper work roll 13a. Further, the rolling calculation unit 22 sets the conveyance direction of the rolled material 1 so as to be reversed from the first pass, and sets the conveyance speed.

  The height from the reference surface 6 of the feed roller 16b is calculated by the pass line calculation unit 24 based on the thickness data of the rolled material 1 rolled in the second pass. The height of the pass line 4b is such that the center line C1 of the thickness of the rolled material 1 that has passed through the first pass coincides with the center line C2 of the distance between the rotation axes of the newly set work rolls 13a and 13b. Set to The pass line height controller 35 moves the feed roller 16b on the pass line 4b side to a set height.

  The height of the pass line 4a from which the rolled material 1 is rolled and discharged is set by the pass line calculation unit 24 so as to coincide with the height of the lower side g1 of the roll gap g. The pass line height control unit 35 moves the feed roller 16a on the pass line 4a side to a set height.

  The table roller rotation control unit 36 and the feed roller rotation control unit 34 rotate the respective rollers in the transport direction set by the rolling calculation unit 22. The transport direction of the second pass is a direction from the pass line 4b toward the rolling mill 12 and from the rolling mill 12 to the pass line 4a.

  The feed rollers 16 a and 16 b roll the rolled material 1 by rotating each roller at the rolling speed calculated by the rolling calculation unit 22 in cooperation with the work rolls 13 a and 13 b.

  As described with reference to FIG. 2, the rolled material 1 that is rolled and discharged by the rolling mill 12 is placed on a drum-shaped cylindrical roller having a constricted central portion in the rotation axis direction. The pass lines 4a and 4b are increased by Δ according to the width dimension of 1. When the rolled material 1 enters the rolling mill 12, when a deviation occurs between the center lines C1 and C2 or a step occurs when the rolled material 1 is discharged, the deviation or the step is determined according to Δ. May be corrected.

  Specifically, as shown in FIG. 3, in the first pass, the height ha of the entry-side pass line 4a is such that the center line C1 in the thickness direction of the rolled material 1 and the upper and lower work rolls 13a and 13b. Is set so as to coincide with the center line C2 of the roll gap g formed.

  When the height from the reference surface 6 of the feed roller 16b on the exit side is a height hb equal to the lower side g1 of the roll gap g when the rolled material 1 is discharged from the rolling mill 12, the actual pass line 4c is Since the position is higher by Δ, the height to be set is hb−Δ. By correcting in this way, the level | step difference at the time of discharge | emission of the rolling material 1 can be made smaller, and a smoother rolling process can be implemented. In addition, about the correction value (DELTA), it calculates in the pass line calculation part 24 based on the quantity by which the rolling material 1 becomes wide by a rolling process. Alternatively, a correction value is obtained by providing a width measurement sensor (not shown) on the pass lines 4 a and 4 b, measuring the width of the rolled material 1, and inputting the measured value of the width of the rolled material 1 to the pass line calculation unit 24. You may make it calculate (DELTA).

  In the above description, the case of correcting the height of the pass lines 4a and 4b when the rolled material 1 is discharged has been described. However, the height of the pass lines 4a and 4b is similarly applied to the case where the rolled material 1 enters the rolling mill 12. Can be corrected.

  Thus, the center line C1 of the thickness of the rolling material 1 and the center line C2 of the roll gap g can be matched by setting the heights of the pass lines 4a and 4b for each pass. Therefore, in the reverse rolling control apparatus 100 of this embodiment, since the pressure of a work roll can be applied uniformly along the conveyance direction of the rolling material 1, it becomes difficult to produce the nonuniformity of a composition and a crop of a rolling material. It becomes possible to manufacture a high quality rolled material 1. Moreover, in this reverse rolling control apparatus 100, since the level | step difference at the time of discharge | emission from the rolling mill 12 can be made small, while a rolling process can be advanced more smoothly, it becomes difficult to damage a rolling material at the time of discharge | emission. . Therefore, in the case of further rolling, it is possible to reduce composition variation and the like, and it is possible to manufacture a high-quality rolled material.

(Second Embodiment)
As described above, in the reverse rolling control apparatus 100 according to the first embodiment, the height of the pass lines 4a and 4b is set by the pass line height control unit 35 for each pass of the rolling process. On the other hand, the length in the conveying direction of the pass lines 4a and 4b of the reverse rolling apparatus is very long, ranging from several tens of meters to several tens of meters. In the reverse rolling control device 100 of the first embodiment, it is necessary to prepare a drive system that moves up and down all the feed rollers 16a and 16b over the entire length of the pass lines 4a and 4b. In order to form such long pass lines 4a and 4b, all the feed rollers 16a and 16b are uniformly set at the same height for a long time in terms of accuracy and setting of the drive system for raising and lowering. In some cases, it is difficult to realize from the viewpoint of needing. Accordingly, the center line C1 in the thickness direction of the rolled material 1 and the center line C2 of the rotating shafts of the upper and lower work rolls 13a and 13b are made to coincide with each other so that the rolled material 1 enters and the level difference at the time of discharge is reduced. The height of some of the feed rollers 16a and 16b may be adjusted and set.

FIG. 4A and FIG. 4B are block diagrams illustrating the main part of the reverse rolling control apparatus according to this embodiment.
As shown to Fig.4 (a), in the reverse rolling control apparatus 100a of this embodiment, the height ha of the pass line 4a is set as a reference value, for example. The height ha of the pass line 4a coincides with the center line C1 in the thickness direction of the rolled material 1 and the center line C2 of the rotation axis of the work rolls 13a and 13b in the pass in which the rolled material 1 enters the rolling mill 12. Set to do. The heights of the feed rollers 16a1 and 16a2 arranged for the entrance-side pass line 4a are ha and are the same. In the pass in which the rolled material 1 is discharged from the rolling mill 12, the height of the pass line 4b 'varies depending on the positions of the feed rollers 16b1 and 16b2. That is, the height of the feed roller 16b1 closest to the rolling mill 12 is set such that the height of the extension line on the rolling mill 12 side of the pass line 4b ′ substantially coincides with the lower side g1 of the roll gap g. The height of the feed roller 16b2 on the side away from the rolling mill 12 is the same as the height ha of the pass line 4a. Therefore, the pass line 4 b ′ is set so as to increase in height as it approaches the rolling mill 12.

  As shown in FIG. 4B, in the next pass, the heights of the feed rollers 16b1 and 16b2 on the side where the rolled material 1 enters the rolling mill 12 are set to the reference height ha. . The heights of the feed rollers 16a1 and 16a2 on the side from which the rolled material 1 is discharged are set to be different from each other. That is, the height of the feed roller 16a1 closer to the rolling mill 12 is set so that the extension line of the pass line 4a 'on the rolling mill 12 side substantially coincides with the lower side g1 of the roll gap g'. The height of the feed roller 16a2 on the side away from the rolling mill 12 is set so as to coincide with the reference height ha.

  In the above description, the case where two feed rollers are arranged in each direction across the rolling mill 12 in the direction in which the pass line extends has been described. However, three or more feed rollers may be arranged. When three or more feed rollers are arranged, for example, the height of the feed roller closest to the rolling mill 12 is set in the same manner as described above, and the height of the feed roller farthest from the rolling mill 12 is set. Is set to maintain the reference height. The height of the feed roller disposed between them is set to gradually increase toward the rolling mill 12 along the pass line. The height of the pass line on the discharge side of the rolled material 1 is set so as to change linearly. Generally, the discharged rolled material 1 bends downward due to gravity as it is discharged, so that the height of the feed roller disposed along the pass line increases as the distance from the rolling mill 12 increases. You may make it set so that a change may become small.

  Considering that the feed rollers 16a1, 16a2, 16b1, 16b2 and the table rollers 18a, 18b have a cylindrical shape constricted in the shape of a drum, as with the reverse rolling control device 100 of the first embodiment, You may make it correct | amend the height of a pass line.

  According to the reverse rolling control apparatus 100a of this embodiment, since it is not necessary to set the height of all the feed rollers 16 to the new pass line 4, the pass line height can be set quickly. Therefore, the reverse rolling process throughput can be improved. Further, since it is not necessary to set the heights of all the feed rollers 16a1, 16a2, 16b1, and 16b2 forming the long pass lines 4a and 4b to be the same, the height can be easily set with high accuracy. High-quality rolled material can be manufactured.

  According to the embodiment described above, it is possible to realize a reverse rolling control device that makes the aluminum alloy composition uniform and improves the yield.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and the equivalents thereof. Further, the above-described embodiments can be implemented in combination with each other.

  1, 1a Rolled material, 4a, 4b, 4c Pass line, 6 Reference plane, 8 Heating furnace, 9 Shear shear, 10 Reverse rolling device, 12 Rolling mill, 13a, 13b Work roll, 14a, 14b Backup roll, 15 Housing case 16, 16a, 16a1, 16a2, 16b, 16b1, 16b2 Feed roller, 18, 18a, 18b Table roller, 20 Process control computer, 22 Rolling calculation unit, 24 Pass line calculation unit, 30 Rolling / conveying controller, 32 Rolling roll Rotation control unit, 33 Rolling roll reduction control unit, 34 Feed roller rotation control unit, 35 Feed roller height control unit, 36 Table roller rotation control unit, 50, 52 network, 100, 100a Reverse rolling control device, C1, C2 center Wire, g roll -Up, g1 the lower side of the roll gap

Claims (4)

A rolling control device that controls a rolling device that rolls by rolling a rolled material containing aluminum into a rolling roll arranged above and below,
Setting a rolling amount of the rolled material, a process control unit for setting a height from a reference surface of a pass line formed on the lower surface of the rolled material based on the rolling amount;
Based on a command from the process control unit, the rolled material is transported along the pass line so that the center line in the thickness direction of the rolled material matches the center line between the rotation axes of the rolling rolls. A feed roller height controller for setting the height of the feed roller;
A rolling control device.   The feed roller height control unit includes a first pass line height that is a height from the reference surface of the pass line on a side where the rolling material bites into the rolling roll, and the rolling material is discharged from the rolling roll. The rolling control apparatus according to claim 1, wherein a second pass line height that is a height from the reference plane of the pass line on the side to be set is set differently.   The rolling control device according to claim 1, wherein the feed roller height control unit gradually changes a height in a vertical direction from the reference surface toward the rolling roll.   A rolling device comprising the rolling control device according to claim 1.

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