KR101843203B1 - Finish-rolling device, as well as method for manufacturing a magnesium strip in such a finish-rolling device - Google Patents

Abstract

The present invention relates to a finish rolling mill (10) for producing a thin magnesium strip (30) supplied to a finish rolling mill and based on a coil (29) fed in particular after a preheating process in a preheating furnace (15) A roll stand (11) for receiving at least two working rolls (32, 33) forming a gap (31), a first coiler (13) for receiving the coil and feeding the magnesium strip to the roll gap, and And a second coiler (12) for winding the magnesium strip after passing through the roll gap, wherein at least the first coil and / or the roll stand comprises heating devices (27, 37) and the coil or magnesium strip Wherein at least the hood device (21) of the first coil (13) is provided on the side of the housing which does not face the roll stand (11), the hood device (21, 22) And a coil passage for introducing the coil (29) And an opening (23) for use.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a method for producing a magnesium strip in a finishing rolling apparatus and a finishing rolling apparatus,

The present invention relates to a finishing rolling apparatus for producing a thin magnesium strip on the basis of coils fed to a finishing rolling apparatus and, more particularly, to a finishing rolling apparatus for producing a thin magnesium strip by means of a roll gap a roll coiler for receiving the coil and supplying the magnesium strip to the roll gap, a second coiler for receiving the coil and for passing the roll gap, And a second coiler for winding up the magnesium strip afterwards. The present invention also relates to a method of making a thin magnesium strip on a finish rolling mill.

Due to the increasing demand, the production of thin magnesium sheets is becoming increasingly important. In particular, the magnesium sheet is also suitable for the production of automobile bodies. The magnesium sheet has a strength comparable to that of the aluminum sheet, but the weight is so small that the energy required for driving the vehicle can be saved, This is because it has been confirmed that this can be a problem.

However, as compared to the production of steel or aluminum sheets, the production of magnesium sheets has been found to be relatively complex, and magnesium is generally present during the cold rolling process due to the hexagonal lattice structure of magnesium And as a result, in order to successfully produce the magnesium sheet, the magnesium sheet is placed between approximately 230 ° C and 450 ° C so as to utilize the relative ductility of the material obtainable in the following temperature range during processing of the magnesium sheet It is required to comply with the specified temperature.

DE 10 2006 026 224 A1 forms part of a production line for the production of magnesium strips and is characterized by the fact that after the introduction into the finish rolling device the finish rolls, in which other means are taken during operation to maintain the elevated temperature level of the coiled magnesium strip Device. For example, winding tubes are provided on the coiler of a reversing finish rolling apparatus and are configured to surround the outside of the coils mandrel so that the winding tubes disposed on the coiler runner The magnesium strip is covered by the winding tubes to keep the temperature loss in the coiler to a minimum. In addition, in a known finish rolling apparatus, a continuous furnace is disposed between the transfer side coiler and the roll stand, allowing the magnesium strip to be heated in the reversing mode.

In the known finish rolling apparatus, since the continuous line added corresponds to the component added to the production line, not only the space required for the finish rolling apparatus and the installation cost are increased, Thereby increasing the strip surface located between the coils. Consequently, the temperature increase of the magnesium strip in the continuous furnace should be made at least in part to compensate for high temperature losses.

It is an object of the present invention to provide a method for manufacturing a thin magnesium strip in a finish rolling apparatus and a finish rolling apparatus which can overcome the above-mentioned disadvantages and in which the magnesium strip can be heated more efficiently in the finish rolling apparatus do.

In order to achieve the object of the present invention, the finish rolling apparatus of the present invention is implemented according to the feature described in claim 1.

In the finishing rolling apparatus according to the present invention, at least the first coiler and / or the roll stand, especially the work rolls and the backup rolls supporting the work rolls are provided with a heating device, and a heat release of the coil and magnesium strip And at least a hood device of the first coiler has a coil passage opening for introducing the coil into the hood device on the side of the housing which does not face the roll stand .

According to the invention, at least the first coil and / or roll stand is associated with a heating device, the efficiency of the heating device being such that the heat dissipation of the coil in the region of the coil stand and the heat release of the magnesium strip in the region of the roll stand are respectively The membrane is enhanced by the hood device. In this way, the magnesium strip can be heated in the region of the finish rolling device without adversely affecting the travel distance between the coils, for example, the magnesium strip has a potential for higher temperature losses due to the increased feed distance Can be heated without considering it. In contrast to conventional finishing rolling apparatus, the finishing rolling apparatus of the present invention does not require any additional space for installation.

Characterized in that at least the hood device of the first coiler has an opening for the coil passage for introducing the coil into the hood device on the side of the housing which does not face the roll stand, It is possible to avoid the temperature loss in the coil section in the loading process. It is preferred that the opening for the coil passage be implemented to be closed to achieve this because it is better to prevent heat loss from occurring during operation of the coil after the coil is loaded therein.

When the heating device is disposed in the hood device, the hood device is particularly advantageous since it can be implemented in the form of modules that can be modularly newly mounted and combined with existing coils, and these units already include a heating device, It is unnecessary to separately install a heating device on the roll stand.

In particular, from the standpoint of a roll stand, for example, in the form of heat radiators arranged in the area of working rolls or backup rolls and provided with separate shields, It is also naturally possible to implement a hood device in the form of a fume hood that implements or protects the entire roll stand or finish rolling device.

It is particularly preferred that the hood device of the coiler includes an opening for the spool passage on the side of the housing which faces the floor space of the finish rolling device so as to respectively allow introduction and removal of the spool for receiving the coil. Thus, after the magnesium strip is unwound from the spool received in the coiler, the spool is removed from the coil, for example without removing the hood device from the coil, and the new preheated spool So that the magnesium strip is supplied with heat rather than cooled by the heat transfer to the spool, rather by the preheated spool.

  There is provided a spool supplying device for supplying at least one spool in the form of a subsurface arrangement beneath the floor space, in relation to the rapid exchange of spools and the minimum handling and travel distance for the spools Wherein the spool feeding device includes a spool handling device which is operable to introduce a spool into a spool receptacle device of a coiler located in the hood and to remove the spool from the spool receiving device / RTI >

It is also particularly advantageous to provide the spool feeder with a heating device for preheating the spools.

In order to supply a plurality of spools, the spool feeding device includes a horizontal conveyor for maganizing a plurality of spools in a conveying position, and the spool handling device is provided between a wind-up position of the spool receiving device and a conveying position It is particularly advantageous to include a vertical conveyor for conveying the spools.

In addition, advantageous means for heating the finishing rolling device may form the object of other dependent claims.

In order to achieve the object of the present invention, the method according to the present invention is performed according to the feature of claim 10.

The method according to the invention is characterized in that during the operation of the finishing rolling device at least the first coil and / or roll stand is provided with a hood device for preventing the heat release of each of the magnesium strips carried through the coils and the roll gap, And heat is applied to the coil and magnesium strip by a heating device located on one side of the hood device which does not face the roll stand after introducing the coil into the hood device.

By rapidly transferring the coils to the inlet side coil of the roll stand, unnecessary heat loss can be already prevented from the start of the rolling process, whereby the heat energy introduced into the magnesium strip in the region of the hood device can be prevented, It does not need to be consumed to compensate for losses.

In order to realize such rapid transfer, a coil bug that can be accommodated in a coil can be used to roll the coil in such a manner that the coil disposed in the coil buggy is introduced into the hood apparatus through the coil passage opening which does not face the roll stand. It is particularly advantageous to load the coiler on the inlet side of the stand.

Particularly in this case, the coil is preheated in the preheat furnace before it is introduced into the inlet side coiler, which makes it possible to minimize the temperature loss across the transfer section between the preheating furnace and the coiler.

After the magnesium strip is unwound from the spool, the spool disposed in the hood device is removed from the spool receiving device of the coiler by a spool handling device disposed under the floor space of the finish rolling device, and at the same time, It is particularly preferred to transport the wound magnesium strip from the coil to a coil deposition station.

 Also, by replacing the spool received in the spool receiving device on the outlet side while the coil is being loaded in the coil on the inlet side, the formation of a heat sink in the region of the outlet side coil can be substantially prevented.

It is more advantageous to use preheated rolls outside the roll stand after the roll change required at the beginning of the rolling process and / or during the operation of the finish rolling leaving.

The present invention overcomes the above-mentioned disadvantages of the prior art and provides a method for manufacturing a thin magnesium strip in a finish rolling apparatus and a finishing rolling apparatus in which a magnesium strip can be heated more efficiently in a finish rolling apparatus .

1 is a configuration diagram of a finish rolling apparatus according to an embodiment of the present invention.

Preferred embodiments of a finishing rolling apparatus are described in detail below with reference to the accompanying drawings, and preferred variants of a method for manufacturing a thin magnesium strip in a finishing rolling apparatus are described.

An essential configuration of the finishing rolling apparatus 10 is that it provides a space for the roll stand 11 between the roll stand 11 and the roll stand 11 and a common floor 14 And two coils 12 and 13 arranged on the upper and lower sides. The attached figure also shows a form in which the finishing rolling device 10 further comprises a preheating furnace 15 in the form of an overhead furnace disposed above and spaced from the common bottom 14 . A spool supply device 17 with a horizontal conveyor 16 is located below the common bottom 14 and comprises two spool handling devices 18 and 19 each having the form of a vertical conveyor 20, a spool handling device is disposed below the coils 12, 13 and forms part of the spool feed device.

According to the embodiment of the finish rolling apparatus shown in the figures, the two coils 12, 13 and the roll stand 11 are each provided with hood arrangements 21, 22. In this case, each of the hood units 21, 22 of the coils 12, 13 is located on the opposite side of the preheating furnace 15 from the coiler 13 on the inlet side 24 of the roll stand 11, (23) disposed on the opposite side of the coil loading station (26) from the coil (12) on the outlet side (35) of the coil (11). The two side hood units (21) each include an opening (41) for the spool passage facing the bottom (14). Inside the hood device 21 there is provided a heating device 27, for example a heating device 27 which is embodied in the form of a heat radiator and is oriented to radiate heat energy in the direction of the spool receiving device 28 Whereby the magnesium strip 30 wound in the form of a coil when the coil 29 is placed in each of the spool receiving devices 28 of the respective coils 12 and 13 and the spool receiving device 28 in the hood device 31 28) is subjected to thermal energy.

In this case, the hood unit 22 constituting a part of the roll stand 11 is similar to a fume hood, and the hood unit includes a shield for thermal energy radiated in the region of the roll stand 11 ) Or a reflecting device and is disposed at the upper end of the roll stand 11. Referring to the drawings, the roll stand includes two work rolls 32, 33 forming a roll gap 31 and backup rolls 34, 35 each supporting one work roll 32, 33 . In this case, the heating devices 37 are arranged in pairs on opposite sides of the frame 36 of the roll stand 11, and the backup rolls 34 and 35 are located between the heating devices 37 and accordingly Thermal energy by the heating device 37 may be applied. It is also possible to combine this heating device with the hood device 22 of the roll stand 11 as an alternative to the arrangement of the heating device 37 in the frame 36

During operation of the finishing rolling apparatus 10 according to the embodiment, the coil 29 heated or preheated in the preheating furnace 15 is conveyed to a coil buggy 38 disposed under the preheating furnace 15 . The coil buggy is then positioned below the spool receiving device 28 of the coiler 13 disposed on the inlet side 24 on the bottom 14 so that the spool 39 of the coil 29 is positioned on the spool receiving device 28 To the coil 13 by inserting it into the coil. During this transportation, the coil buggy 38 that carries the coil 29 moves into the hood device 21 through the opening 23 for the coil passage of the hood device 21 and the opening 41 for the spool passage. After the coil 29 is received in the coiler 13, the coil opener 42 (coli opener) 42 disposed on the hood device 21 or the coiler 13 is allowed to connect to the beginning of the unshown strip So that the strip is inserted from the inlet side 24 into the roll gap 31 and then into the coiler 12 disposed on the outlet side 25 of the roll stand 21. The beginning of the unillustrated strip is then fixed on the spool 39 received in the spool receiving device 25 of the coiler 12 by conventional means, for example a wind-up device, The magnesium strip 30 can be continuously wound on the spool 39 of the coiler 12 as the magnesium strip 30 is loosened in the jar 13. The attached drawing shows the state during the roll pass and about half of the magnesium strip 30 initially placed on the coil 29 is disposed in the coil 12 and the magnesium strip To the spool (29) functioning as a winding. In the process at the finishing rolling device 10, a roll-passing process is performed a predetermined number of times in the reversing mode depending on the desired final thickness of the magnesium strip 30, Operates alternately with an unwinding device and a wind-up device.

After the last roll pass process is performed, the full length magnesium strip 30 is placed on the spool 39 of the coil 12 and the coil 29 disposed in the coil 12 is placed on the coil 12, Which can then be removed from the spool receiving device 28 of the coil bug 43 and transferred to a coil buggy 43 disposed on the outlet side 25 and then transferred from the coil buggy 43 to the coil loading station 26, Moves along the coil passage opening (23) together with the coil (29) to move out of the hood unit to carry the coil (29).

When the coil 29 is moved to the coil loading station 26 a new coil 29 is transferred from the preheating furnace 15 to the coiler 13 on the coil inlet side 24 by the coil bug 38 .

After each of the last roll passes is completed, for example after the magnesium strip 30 has been transferred from the unwinding coil 13 to the winding coil 12, the empty spool 39, by the coil handling device 19, And is delivered to the spool feeder 17. At the exit side 25 a finish rolled coil is conveyed by the coil bug 43 to the coil loading station 26 and at the same time the spool feeder 17 is ready, The coil 39 preheated by the heating device 44 provided on the spool 17 is inserted into the spool receiving device 28 of the coiler 12. [ After the spool 39 has been transferred to the transfer position 45 by the horizontal conveyor 16 of the spool feeder 17, the spool 39 is fed by the coil handling device 18, (39). In order to realize such an exchange operation, the spool handling devices 18, 19 are characterized in that they each include a vertical conveyor 20 disposed below the spool receiving device 28 of the coils 12, 13, respectively.

As the magnesium strip 30 is transported through the roll gap 31, heat is released from the magnesium strip 30 along the transported portion between the coils 12,13. On the other hand, heat is applied to the magnesium strip 30 by the heating devices 27 and 37 in the hood device 21 and the hood device 22 of the roll stand 11. In the exemplary embodiment described with reference to the drawings, the hood device 22 of the roll stance 11 is embodied in such a way as to cover the transport portion between the coils 12, 13, Thereby forming a shield for preventing heat release in the area of the roll stand 11 as well as in the area of the entire finish rolling apparatus 10. [

10: Finish rolling device 11: Roll stand
12, 13: Coiler 15: Preheating furnace
21, 22: Hood device 23: Coil passage opening
29: coil 27, 37: heating device
30: Magnesium strip 31: Roll gap
32, 33: work roll

Claims (14)

A finishing rolling apparatus (10) for producing a thin magnesium strip (30) based on a coil (29) supplied to a finish rolling mill after a preheating step in a preheating furnace (15) A first coil for receiving the coil and for supplying the magnesium strip to the roll gap 31 and a second coil for passing the roll gap 31 through the roll gap 31, And a second coiler (12) for winding a subsequent magnesium strip, the finishing rolling apparatus (10)
Both the first coil 13 or the roll stand or the first coil 13 and the roll stand are connected to the heating devices 27 and 37 and the coil or the hood device 21, 22,
The hood unit 21 of the first coil unit 13 is provided on the housing side which does not face the roll stand 11 for introducing the coil 29 into the hood unit 21 And a coil passage opening (23).
The method according to claim 1,
Wherein the heating device (27) is installed on the hood device (21).
The method according to claim 1,
The hood device 21 of the first coiler 13 and the second coiler 12 is mounted on the housing side facing the bottom space of the finish rolling device 10, And a spool passage opening (41) for introducing or removing the spool (39).
The method of claim 3,
A spool feeder 17 for feeding the spool 38 is provided in the form of an underground device beneath the floor space and the spool feeder is connected to the first coiler 13 and the second coiler 13 located in the hood 21, 2 includes a spool handling device 18, 19 that performs the function of introducing the spool 39 into the spool receiving device 28 of the coiler 12 and of removing the spool 39 from the spool receiving device 39 And the finish rolling apparatus.
5. The method of claim 4,
Characterized in that the spool feeder (17) comprises a heating device (44) for heating the spools (39).
The method according to claim 4 or 5,
The spool feeder 17 includes a horizontal conveyor 16 for maganizing a plurality of spools 38 and for transferring the spools to a transfer position 45, And a vertical conveyor (20) for transferring the spools between the winding position and the transfer position in the spool receiving device (28).
The method according to claim 1,
Characterized in that the backup rolls (34, 35) supporting the work rolls (32, 33) or the work rolls (32, 33) are formed of a material capable of being heated and are realized in roll form Rolling device.
The method according to claim 1,
Characterized in that the second coiler (12) comprises a spool receiving device (28) formed of a heatable material.
The method according to claim 1,
Characterized in that the second coiler (12) comprises a winding device formed of a material which is capable of being heated.
A method for manufacturing a thin magnesium strip (30) in a finish rolling device (10) based on a coil (29) supplied to a finish rolling device after a preheating process in a preheating furnace (15) Which is conveyed through a roll gap 31 formed between the two work rolls 32 and 33 in the roll stand 11 so as to provide a space for the roll stand 11 between them, In the method of alternately operating the unwinding device (13) and the second coiler (12) with the unwinding device and the winding device,
Both the first coil 13 or the roll stand 11 or the first coil 13 and the roll stand 11 are fed through the roll gap 31 during operation of the finish rolling device The magnesium strip and the membrane from which the heat is released from the coils accommodated in the first coil 13 and the second coil 12 are provided with the hood apparatuses 21 and 22,
The coil or the magnesium strip is provided with a coil passage opening 23 formed on the housing side of the hood device of the first coiler 13 which does not face the roll stand 11, Characterized in that heat is applied by the heating device (27) after being introduced.
11. The method of claim 10,
The coil 29 heated by the preheating furnace 15 is loaded on the first coil 13 disposed on the inlet side 24 of the roll stand 11 and disposed on the spool 39, The coil is conveyed from the preheating furnace to the coil bugler 38 and through the opening 23 for the coil passage which does not face the roll stand so as to be received in the first coiler 13, Is introduced into the hood device (21) by means of a hinge (38).
11. The method of claim 10,
The spool 39 located in the hood apparatus 21 or 22 is moved to the spool handling apparatus 10 disposed below the floor space of the finish rolling apparatus 10 after the magnesium strip 30 has been released from the spool 39 The magnesium strip 30 wound on the spool 39 is removed from the spool receiving device 28 of the first coiler 13 by means of the coil bug 43, 12) to the coil loading station (26).
13. The method according to any one of claims 10 to 12,
When the coil 29 is loaded into the first coil 13 on the inlet side 24 of the roll stand 11, the second coiler 12 on the outlet side 25 of the roll stand Characterized in that the spool receiving device (28) is loaded with the spool preheated by the spool feeding device (17) by the spool handling device (18).
13. The method according to any one of claims 10 to 12,
Backup rolls 34 and 35 for supporting the work rolls 32 or 33 or the work rolls used in the roll stand 11 are arranged in a manner that allows the operation of the roll stand to produce the magnesium strip 30, Is preheated outside the roll stand.

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