JP5941680B2 - Final rolling apparatus for producing magnesium strip and method for producing magnesium strip - Google Patents

Description

  The present invention includes a roll mount that houses at least two processing rolls that define a roll gap, a first coiler that houses a coil and supplies a magnesium strip to the roll gap, and the magnesium strip penetrates the roll gap. And a second coiler for winding the magnesium strip, and a final rolling device for producing a thin magnesium strip that forms the basis of a coil supplied to the final rolling mill, particularly after a preheating process by a preheating furnace Furthermore, it relates to a method for producing a thin magnesium strip using this type of final rolling equipment.

  Due to the increasing demand, the production of thin magnesium sheets has become increasingly prominent. In particular, the magnesium sheet is suitable for car body manufacturing and has the same strength characteristics as the aluminum sheet, but it is lighter and saves energy during the operation of the car besides developing a new driving concept Options can potentially be realized.

  However, compared to the production of steel or aluminum sheets, the production of magnesium sheets is a good way to process magnesium sheets because magnesium is brittle at the processing temperatures that exist during the cold rolling process because of its hexagonal lattice structure. In order to take advantage of the relative ductility of the material that can be achieved in the temperature range, the manufacture of the magnesium sheet is comparative, as it requires observation of a predetermined temperature range approximately located between 230 ° C and 450 ° C. I know it will be difficult.

  Patent Document 1 discloses a final rolling device that forms part of a production line for producing a magnesium strip, and in that process, after the magnesium strip is introduced into the final rolling device, the temperature of the magnesium strip is increased. Different treatments are performed to maintain the same. For example, the bent tube is provided in the coiler of the inverted final rolling device so that the magnesium strip placed on the coiler mandrel is covered by the bent tube to keep the temperature loss of the coiler to a minimum. Forms the outer encapsulation of the mandrel. In addition, the continuous furnace is placed between the roll cradle and the coiler on the conveying side of the known final rolling equipment, allowing the magnesium strip to be heated in reverse mode.

German Patent Application No. 10 2006 036 224

  However, in the known final rolling equipment, the strip surface increases between the coilers, so that the intermediate device of the continuous furnace results in a longer strip transport distance between the coilers, increasing the installation expenditure and the space requirements of the final rolling equipment. The additional continuous furnace becomes an interpolated component of the production line. Thus, the temperature increase of the magnesium strip realized in the continuous furnace is partially offset by at least a high temperature loss.

  The present invention eliminates the above-mentioned problems and provides a final rolling apparatus and a method for producing a thin magnesium strip using the same, so that the magnesium strip can be heated more effectively within the range of the final rolling apparatus. Based on the purpose of providing.

  In order to achieve the above object, in the present invention, the final rolling device is realized according to the features of claim 1.

  In the final rolling device of the present invention, a hood device and a heating device for protecting the coil or the magnesium strip from heat radiation are provided in at least one of the first coiler and the roll mount (especially the work roll or the backup roll that supports the work roll). At least the hood device of the first coiler serves as a coil passage hole for introducing the coil into the hood device on the housing side facing the outside of the roll mount.

  According to the present invention, at least one of the first coiler and the roll mount is coupled to a heating device, and the efficiency is improved by a hood device that protects the coil from thermal radiation in the area of the coiler and protects the magnesium strip from thermal radiation in the area of the roll mount. Improved. That is, in this method, the magnesium strip can be heated in the region of the final rolling device without affecting the transport distance between the coilers and being disadvantageous. That is, the magnesium strip can be heated without the possibility of higher temperature loss due to the extended transport distance. Compared to conventional final rolling equipment, the final rolling equipment of the present invention does not require any additional space for installation.

  At least the hood device of the first coiler serves as a coil passage hole for introducing the coil into the hood device on its housing side facing the outside of the roll mount, so that a temperature loss that can be prevented during the loading process It is not necessary to remove the hood device from the coiler when the coil is put into the coiler so that it does not occur in the area. It is desirable that the coil passage hole be formed so that the coil can be closed during the operation of the coiler after it is placed thereon to achieve an even better shield against heat loss.

  It is particularly advantageous to arrange the heating device in the hood device so that the hood device can be modified in a modular manner and realized in the form of a device that can be combined with an existing coiler. In that case, the hood device already acts as a heating device so that no separate installation of the heating device on the coiler or roll cradle is required.

  With regard to the roll mount in particular, a smoke hood which realizes a heating device, for example in the form of a heat radiator, arranged in the region of the work roll or backup roll independently of the hood device and / or protects all of the roll mount or final rolling device The hood device can be realized in the form of

  It is particularly advantageous for the coiler hood device to serve as a housing side spool passage hole facing the floor space of the final rolling device for introducing and removing a spool for receiving the coil. After the magnesium strip is unwound from the spool housed in the coiler, for example, without separating the hood device so that the magnesium strip is not cooled by heat transfer to the spool and is rather supplied with heat by the preheated spool. It is also possible to remove the spool from a good coiler and introduce a new preheated spool into the coiler before winding the magnesium strip during the next roll pass.

  With regard to the fast exchange of the spool and the minimum handling and transport distance for the spool, it is particularly advantageous to provide the spool supply device with at least one spool under the floor space in the form of an underfloor device. Is provided with a spool handling device which serves to introduce or remove the spool from the coiler spool receptacle device located in the hood device.

  It is also particularly advantageous to provide a heating device in the spool supply device for preheating the spool.

  In order to supply a plurality of spools, a spool supply means for conveying the spools between a horizontal conveyor for loading a plurality of spools in a transfer position and a transfer position and a hoisting position of the spool receptacle device It is particularly advantageous to include a spool handling device that acts as a vertical conveyor.

  Further advantageous methods for heating the final rolling device form the object of other dependent claims.

  For the purpose of the invention, the inventive method is carried out according to the characteristics of claim 10.

  In the method of the present invention, at least one of the first coiler and the roll base is a hood that protects the coil and the magnesium strip accommodated in the coiler conveyed through the roll gap from thermal radiation during the operation of the final rolling apparatus. Heat is applied to the coil or the magnesium strip after the introduction of the coil into the hood device by the heating device on the hood device side facing the outside of the roll mount.

  By rapidly moving the coil to the coiler on the inlet side of the roll mount so that the thermal energy introduced into the magnesium strip by the heating device in the area of the hood device is not partially consumed by compensation for unnecessary temperature loss Unnecessary temperature loss can be prevented in the first stage of the rolling process.

  In order to realize this quick transfer, the coil arranged in the coil buggy is introduced into the hood device by the coil buggy through the coil passage hole facing outward of the roll mount in order to be accommodated in the coiler. It is particularly advantageous to load a coiler which is arranged on the inlet side of the roll cradle with the coil in such a way.

  For example, the coil may be preheated in a preheating furnace before being packed in the coiler on the inlet side. This makes it possible to minimize the temperature loss on the transport section between the preheating furnace and the coiler.

  After unwinding the magnesium strip from the spool, the spool handling device placed under the floor space of the final rolling device removes the spool placed in the hood device from the spool receptacle device of the coiler and at the same time exits by coil buggy It is also particularly advantageous to transfer the rolled magnesium strip from the coiler on the side to the coil deposition station.

  In general, prevent formation of a heat sink in the area of the coiler on the outlet side by replacing the spool housed in the spool receptacle device on the outlet side while the coiler on the inlet side is loaded with the coil. Can do.

  It is further advantageous to utilize a pre-heated roll outside the roll mount at the beginning of the rolling process and after a necessary roll change at least during the operation of the final rolling mill.

  In order to elucidate the preferred variations of the method of manufacturing the thin magnesium strip of the final rolling mill, preferred embodiments of the final rolling mill are described in more detail with reference to the drawings.

It is a front view which shows the whole final rolling apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the basic components of the final rolling device 10 include a roll mount 11, two roll mounts 11 that are accommodated between the roll mount 11 and arranged on a general floor surface 14 together with the roll mount 11. It consists of a first coiler 13 and a second coiler 12. As shown in FIG. 1, in the present embodiment, the final rolling device 10 is further provided with a preheating furnace 15 in the form of an overhead furnace placed above the floor surface 14. A spool supply device 17 having a horizontal conveyor 16 is arranged below the floor surface 14 and two spool handling devices 18, 19 each acting as a vertical conveyor 20 are a second coiler 12 and a first coiler. 13 are respectively allocated to the spool supply devices.

  According to the exemplary embodiment of the final rolling device 10 shown in FIG. 1, the first coiler 13 and the second coiler 12 each include a hood device 21, and the roll mount 11 includes a hood device 22. In this case, the hood device 21 of the first coiler 13 serves as a coil passage hole 23 arranged to face the preheating furnace 15 on the first coiler 13 on the inlet side 24 of the roll mount 11, and the second coiler The 12 hood devices 21 serve as coil passage holes 23 arranged to face the coil deposition station 26 on the second coiler 12 on the outlet side 25 of the roll mount 11. Both hood devices 21 also serve as spool passage holes 40 and 41 that face the floor surface 14 respectively. That is, when the coil 29 is disposed on the spool receptacle device 28 of each of the first coiler 13 and the second coiler 12, the magnesium strip wound around the coil 29 in the same manner as the spool receptacle device 28 in the hood device 21. In such a way that heat energy is applied to 30, the interior of the hood device 21 is realized in the form of a heat radiator, for example, and is placed in the correct position so as to radiate heat energy in the direction of the spool receptacle device 28. A heating device 27 is provided.

  The hood device 22 provided on the roll pedestal 11 is similar to a smoke hood in this case, and this hood device 22 forms a shield or reflector for the emitted thermal energy in the region of the roll pedestal 11, It is arranged at the upper end part. According to FIG. 1, the roll mount 11 serves as two processing rolls 32, 33 that define a roll gap 31 and two backup rolls 34, 35, each supporting one processing roll 32, 33. In this case, the heating device 37 is paired in the frame 36 of the roll mount 11 and is disposed on the opposite side, and the backup rolls 34 and 35 are disposed between the heating devices 37. Energy can be added. As an alternative to the arrangement of the heating device 37 on the frame 36, these heating devices 37 can be integrated with the hood device 22 of the roll base 11.

  During operation of the exemplary final rolling apparatus 10 shown, the coil 29 tempered or preheated in the preheating furnace 15 is transferred to a coil buggy 38 disposed under the preheating furnace 15. Thereafter, the coil buggy 38 is positioned under the spool receptacle device 28 of the first coiler 13 located on the inlet side 24 on the floor surface 14 and inserting the spool 39 of the coil 29 into the spool receptacle device 28, Move to first coiler 13. During this movement, the coil buggy 38 carrying the coil 29 moves to the hood device 21 through the coil passage hole 23 and the spool passage hole 41 of the hood device 21. After the coil 29 is accommodated in the first coiler 13, the coil opener 42 or the hood device 21 arranged in the first coiler 13 can access the leading end of the strip inserted into the roll gap 31 from the inlet side 24 (not shown). After that, the tip of the strip is sent to the second coiler 12 arranged on the outlet side 25 of the roll mount 11. Thereafter, the leading end of the strip (not shown) is, for example, a hoisting device, so that the magnesium strip 30 can be wound on the spool 39 of the second coiler 12 by rewinding the magnesium strip 30 of the first coiler 13. It is fixed to the spool 39 accommodated in the spool receptacle device 28 of the second coiler 12 having conventional means. FIG. 1 shows the process during the course of a roll pass, in which about half of the magnesium strip 30 previously arranged in the coil 29 is placed on the second coiler 12 and serves to wind the magnesium strip 30. Moved to. Depending on the desired final thickness width of the magnesium strip 30 being processed in the final rolling device 10, the second coiler 12 and the first coiler 13 are operated as either a rewinding device or a hoisting device. As described above, a predetermined number of roll passes are performed in the reverse mode.

  After the last roll pass has been made, the coil 29 located on the second coiler 12 can be removed from the spool receptacle device 28 of the second coiler 12 and transferred to the coil buggy 43 located on the outlet side 25. Thus, the entire magnesium strip 30 is located on the spool 39 of the second coiler 12. The coil buggy 43 moves from the coil buggy 43 to the coil deposition station 26 through the coil passage hole 23 together with the coil 29 and then from the hood device 21.

  While the coil 29 is moved to the coil deposition station 26, the new coil 29 can be transferred from the preheating furnace 15 to the first coiler 13 on the inlet side 24 by the coil buggy 38.

  After the completion of the last respective roll pass, i.e. once the magnesium strip 30 has been transferred from the rewinding coiler (first coiler 13) to the winding coiler (second coiler 12), the coil 29 is moved by the handling device 19 The empty spool 39 removed from the one coiler 13 is delivered to the spool supply device 17. On the exit side 25, the final rolled coil 29 is simultaneously transferred to the coil deposition station 26 by a coil buggy 43. Then, the spool 39 kept in a ready state in the spool supply device 17 and preheated by the heating device 44 provided in the spool supply device 17 is inserted into the spool receptacle device 28 of the second coiler 12. After the spool 39 is moved to the transfer position 45 by the horizontal conveyor 16 of the spool supply device 17, the spool 39 is replaced with the spool 39 disposed in the second coiler 12 by the spool handling devices 18 and 19 in advance. In order to realize this exchange movement, the spool handling devices 18 and 19 serve as vertical conveyors 20 disposed under the spool receptacle devices 28 of the first coiler 13 and the second coiler 12, respectively.

  While the magnesium strip 30 is transported through the roll gap 31, heat is generated by the magnesium strip 30 along the transport section between the first coiler 13 and the second coiler 12. On the other hand, heat is applied to the magnesium strip 30 by the heating device 37 in the hood device 22 of the roll base 11, and heat is applied by the heating device 27 in the hood device 21. In the exemplary embodiment shown in FIG. 1, the hood device 22 of the roll cradle 11 covers the transport section between the first and second coilers 13, i.e. not only the area of the roll cradle 11 but also the final rolling. The entire area of the device 10 is also realized to form a shield against heat radiation.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

10 Final rolling equipment 11 Roll mount 12 Winding coiler (second coiler)
13 Rewinding coiler (first coiler)
DESCRIPTION OF SYMBOLS 14 Floor 15 Preheating furnace 16 Horizontal conveyor 17 Spool supply device 18, 19 Spool handling device 19 Handling device 20 Vertical conveyor 21, 22 Hood device 23 Coil passage hole 24 Inlet side 25 Outlet side 26 Coil deposition station 27 Heating device 28 Spool receptacle Device 29 Coil 30 Magnesium strip 31 Roll gap 32, 33 Processing roll 34, 35 Backup roll 36 Frame 37 Heating device 38 Coil buggy 39 Spool 40, 41 Spool passage hole 42 Coil opener 43 Coil buggy 44 Heating device 45 Transfer position

Claims (14)

A roll mount (11) containing at least two processing rolls (32, 33) defining a roll gap (31);
A first coiler (13) for receiving a coil (29) and supplying a magnesium strip (30) to the roll gap (31);
A second coiler (12) for winding the magnesium strip (30) after the magnesium strip (30) has penetrated the roll gap (31);
A final rolling device (10) for producing a thin magnesium strip (30) underlying the coil (29) supplied to the final rolling mill after a preheating process by a preheating furnace (15),
A hood device (21, 22) for protecting the coil (29) or the magnesium strip (30) from heat radiation on at least one of the first coiler (13) and the roll mount (11); and a heating device (27, 37); Is provided,
A coil (29) from the preheating furnace (15) is placed on the hood device (21) of the first coiler (13) on the housing side facing the outside of the roll mount (11). A final rolling device for producing a magnesium strip, characterized in that a coil passage hole (23) for introduction into a metal strip is formed. The final rolling apparatus for producing the magnesium strip according to claim 1,
The said rolling device (27) is arrange | positioned at the said food | hood apparatus (21), The final rolling apparatus for manufacturing the magnesium strip characterized by the above-mentioned. In the final rolling apparatus for producing the magnesium strip according to claim 1 or 2,
The hood device (21) introduces a spool (39) for accommodating the coil (29) and removes the final rolling device (10) for producing the magnesium strip (30) for removal. A final rolling device for producing a magnesium strip, characterized by having spool passage holes (40, 41) on the housing side facing the floor space. In the final rolling apparatus for producing the magnesium strip according to claim 3,
A spool supply device (17) for supplying at least one spool (39) is provided under the floor space in the form of an underfloor device;
The spool supplying device (17), the spool availing the spool (39), for introducing the spool receptacle device (28) located above the hood unit (21), and is removed from the spool receptacle device (28) A final rolling device for producing a magnesium strip, characterized by acting as a handling device (18, 19). In the final rolling apparatus for producing the magnesium strip according to claim 4,
A final rolling device for producing a magnesium strip, wherein the spool supply device (17) is provided with a heating device (44) for heating the spool (39). In the final rolling apparatus for producing the magnesium strip according to claim 4 or 5,
The spool feeder (17) includes a horizontal conveyor (16) for loading a plurality of spools (39) and transporting the spool (39) to a transfer position (45);
Role of the vertical conveyor (20) for the spool handling device (18, 19) to convey the spool (39) between the transfer position (45) and the spool receptacle device (28) winding position. A final rolling device for producing a magnesium strip characterized by In the final rolling apparatus for producing the magnesium strip according to any one of claims 1 to 6,
At least one of the said processing roll (32, 33) and the backup roll (34, 35) which supports this processing roll (32, 33) is comprised with the roll which can be heated, The magnesium strip characterized by the above-mentioned is manufactured. Final rolling equipment for doing. In the final rolling apparatus for producing the magnesium strip according to any one of claims 1 to 7,
The final rolling device for producing a magnesium strip, wherein at least the second coiler (12) plays a role of a heatable spool receptacle device (28). In the final rolling apparatus for producing a magnesium strip according to any one of claims 1 to 8,
A final rolling device for producing a magnesium strip, characterized in that at least the second coiler (12) is provided with a heatable hoisting device. In the reverse mode in which the first coiler (13) and the second coiler (12) in which the roll mount (11) is accommodated between each other operate as either one of the unwinding device and the hoisting device, the magnesium strip (30 ) Is conveyed through a roll gap (31) formed in the roll cradle (11) between the two processing coils (32, 33), and after the preheating process of the preheating furnace (15), the final rolling device ( 10) a method for producing a thin magnesium strip (30) which forms the basis of a coil (29) supplied to a final rolling mill,
Hood device (21, 22) in which at least one of the first coiler (13) and the roll mount (11) protects the coil (29) accommodated in the first coiler (13) and the second coiler (12), respectively. )
Through the coil passage hole (23) provided on the housing side of the hood device (21) of the first coiler (13) facing the outside of the roll mount (11), the coil ( After introducing 29)
While the coil (29) or the magnesium strip (30) is heated by the heating device (27),
Magnesium strip manufacturing method, characterized in that the magnesium strip (30) is conveyed through the roll gap (31) against thermal radiation during operation of the final rolling device (10). In the manufacturing method of the magnesium strip of Claim 10,
The first coiler (13) disposed on the inlet side (24) of the roll mount (11) is loaded with a coil (29) heated in a preheating furnace (15),
The coil (29) is disposed in the spool (39) as transferred to the preheating furnace (15) or Rako Irubagi (38), by the coil buggy (38), the outside of the roll stand (11) Through the coil passage hole (23) facing toward the first coiler (13) and led to the hood device (21) of the first coiler (13). . In the manufacturing method of the magnesium strip of Claim 10 or 11,
The spool (39) placed in the hood device (21) is placed under the floor space of the final rolling device (10) after the magnesium strip (30) is rewound from the spool (39). Removed from the spool receptacle device (28) of the first coiler (13) by the spool handling device (18, 19),
Simultaneously, the magnesium strip (30) is transferred from the second coiler (12) to the coil deposition station (26) by a coil buggy (43). The method for producing a magnesium strip according to claim 12 ,
While the coil (29) is loaded on the first coiler (13) on the inlet side (24) of the roll mount (11), the spool handling device (18) causes the outlet side of the roll mount (11). (25) on the spool receptacle device of the second coiler (12) (28), at least one spool (39) with the spool which is preheated in spool supply device (17) for supplying (39) A method for producing a magnesium strip, characterized by being stacked. In the manufacturing method of the magnesium strip as described in any one of Claims 10 thru | or 13,
At least two processing rolls (32, 33) defining a roll gap (31) and a backup roll (34, 35) supporting at least one of the processing rolls (32, 33) used in the roll mount (11) Is preheated outside the roll mount (11) before the operation of the roll mount (11) for manufacturing the magnesium strip (30).

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