CN104245171A - Method and device for descaling a scaled metal strip - Google Patents
Method and device for descaling a scaled metal strip Download PDFInfo
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- CN104245171A CN104245171A CN201380020462.3A CN201380020462A CN104245171A CN 104245171 A CN104245171 A CN 104245171A CN 201380020462 A CN201380020462 A CN 201380020462A CN 104245171 A CN104245171 A CN 104245171A
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- smoothing roll
- band
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- guide roller
- smoothing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0071—Levelling the rolled product
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/45—Scale remover or preventor
- Y10T29/4517—Rolling deformation or deflection
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Abstract
The invention relates to a method for descaling a scaled metal strip, in particular a hot-rolled metal strip with a thickness of more than 1mm, for example 1.2mm to 16mm. The strip is guided around at least two straightening rollers which are arranged one behind the other in the strip running direction and undergoes an alternating bending in the process. At least one of the straightening rollers can be positioned transversely to the strip running direction. The method is characterized in that the strip is unstressed or is under a low tensile stress of less than 10% of the yield strength of the strip on the inlet side upstream of the straightening rollers, and the diameter of the straightening rollers, the spacing between same in the strip running direction, and the positioning of the rollers transverse to the strip running direction are selected while taking into consideration the strip properties such that expansions and compressions of at least 2%, preferably at least 3%, are produced in the course of a first plastic bending process and a second plastic bending process on the strip upper face and on the strip lower face for the purpose of descaling.
Description
Technical field
The present invention relates to a kind of method and apparatus for carrying out discale to band iron scale metal tape, described metal tape especially has more than 1mm, such as 1.2mm to the hot rolled metal strip of 16mm thickness, wherein, described band around at least two on the traffic direction of band the smoothing roll that in succession arranges directed and stand alternating bending in this case, wherein, smoothing roll described at least one can transverse to the traffic direction adjustment of band.Metal tape refers in particular to the metal tape be made up of steel or special steel within the scope of the invention.It can relate to the band be rolled on reel.But, metal tape also fingerboard material or similar strip sections within the scope of the invention.
Background technology
Especially be necessary to its de-scaling at metal tape when hot rolling, such as, in the mode of pickling or also carry out de-scaling by other means.In order to improve de-scaling, known that iron scale on belt surface is mechanically broken, such as to ensure the better acid attack when pickling.The discale in practice usual mode with extension detorsion realizes.Except the pre-de-scaling of effective machinery, the out-of-flatness that can be removed in band by plastic extension when extension detorsion with the higher process speed caused thus and less acid consumption.
This method for carrying out discale by extension detorsion to hot-rolled strip is such as known by DE 23 50 503 B1 and DE 29 42 270 A1.In order to produce for the necessary band tensile force of the detorsion that extends at entrance side and outlet side, this extension detorsion equipment is equipped with the stress roller group at entrance side and outlet side.Due to the deformation loss with the double increase of tape thickness, at the band tensile force of outlet side usually apparently higher than the band tensile force at entrance side.The elongation of General Requirements more than 1% in practice, to reach discale and improve leveling effect effectively simultaneously.In equipment and technology, this is premised on higher investment spending, and especially because necessary stress roller group.The discale of this utilization extension detorsion equipment is also limited in be had on the band processing line of continuous band, make reel take the lead or magnetic tape trailer must be connected to each other.
Alternatively, a kind of device for carrying out the pre-de-scaling of machinery to hot-rolled band is mentioned in DD 294 886 A5, this device is set to be connected on the coiling machine of descaling bath upstream, wherein, this device is made up of multiple roller support, wherein each roller support be furnished with concave change shape with the roller of convex distortion, wherein, these rollers are to from roller support to roller support, ground changes its roll profile accordingly, make the channel profile between roller sometimes have vault upwards, there is downward vault sometimes.Such device also should be able to be used in continuously-pickling-equipment, and wherein, transmission can such as realize by drive roller sets.By the roller profile of conversion, be with by time be alternately out of shape, wherein, what cause due to convex-concave profile bending carries out around axle substantially, and this axle extends along the traffic direction of band.Curved geometric sets in this geometry by roller, makes this equipment only can be adapted to different situations insufficiently.
By the known a kind of method and apparatus for carrying out de-scaling to metal tape of DE 10 2,009 035 161 A1, wherein low temperature agent (such as liquid nitrogen) is applied on belt surface, to be separated and to remove dirt particle or iron scale particle.Before this external applying low temperature agent, water is applied on belt surface.When applying water or after applying water and before applying low temperature agent, band can at least be guided by least one roller in side, makes band stand flexural deformation.
In addition a kind of known method for carrying out de-scaling to hot rolled steel plate, wherein, described plate is deformed to destroy oxide layer, and destroyed oxide layer is pruned by buffing and removed.Therefore, this plate is with the bend radius between 50mm and 300mm.This plate extend maximum reach at least 0.2% elongation (with reference to DE 198 17 525 A1).
In addition, known a kind of device for aligning metal tape, the deflector roll that this metal tape has setting parallel to each other and the smoothing roll be arranged in the tapered member of two deflector rolls, wherein, band shape between two contacts wire is wound around smoothing roll in locking manner, along described contact wire, deflector roll is in the mediate contact with smoothing roll by band.Aligning is realized by the change of curved shape, makes band tensile force not need to bear straightening operation, and only for band is moved forward.Necessary tensile force keeps the power far below extending when extension detorsion and needed for curved bel.At this, deflector roll and smoothing roll are formed respectively to be aligned gap and occupies at this that determined by tape thickness with spacing that is smoothing roll, makes the band on two contacts wire be clamped at (with reference to EP 0 865 839 B1 or DE 197 08 488 A1) between smoothing roll and each deflector roll with identical gap.
This expansion scheme of being aligned by " shape is sealed bending " is such as set forth in DE 199 17 561 C1.Thisly for shape sealed bending exploitation, discale technology not to be affected.
Last also by a kind of known method for discale of US 2010/0146757A1.
Summary of the invention
The object of the invention is to realize a kind of method, it realizes the fabulous and discale of economy when reducing investment-spending of equipment and technology.
In order to realize this object, the present invention this for band iron scale metal tape, especially hot rolled metal strip carries out instructing in the method for discale: with entrance side smoothing roll upstream not tension stretch or the be in yield limit that is less than 10% of band and/or be less than 25MPa little tensile stress under, and the diameter of smoothing roll and its when be with traffic direction on spacing and its transverse to band traffic direction adjustment consider band characteristic (and tensile stress) select like this, make to produce at least 2% in band front and band reverse side in the process of the first plastic bending (on the first smoothing roll) and the second plastic bending (on the second smoothing roll), the elongation of preferred at least 3% and compression ratio.
In this present invention from following understanding in: if by the alternating bending of not tension stretch make the elongation on band front or band reverse side or compression ratio enough large, even if discale that so still can be fabulous when not having extensibility and so there is no the plastic elongation of being with.The plasticity overall elongation caused when extension detorsion is removed.However, the effect of the acid corrosion of acid or mechanical discale method (as brushing away or shot-peening) also can by when significantly improving without when extensibility.According to the present invention, be with at least one times plastic bending in one direction and once plastic bending on other direction, not only compress by plastic extension but also by plasticity to make band front and band reverse side.In order to reach roughly the same discale effect on both faces, twice being bent and preferably regulates with roughly the same bending radius respectively.By the compact Layout of roller, though not tension stretch by time or when not having tensile stress or tensile stress very little in band, still force to be greater than 2%, to be preferably greater than the sideline of 3% elongation/compression ratio.The present invention at this from following understanding: when roller by mutual closely arranged time, this bending extension can produce without any problems.But " shape is sealed bending " such as described in EP 0 865 839 B1 is saved clearly.And the spacing between the roller surface of the roller of two direct neighbors is greater than tape thickness all the time, make that shape does not occur sealed bending.This has following advantage, that is, be broken and can be eliminated by the iron scale partly peeling or fall down, such as in seasoning and by siphon away or in moist method by such as with water rinse remove.Even if this is also possible during compact Layout at smoothing roll, thus the heap sum of iron scale on smoothing roll is avoided to bond and surface damage related to this on tape.Because shape sealed bending time exist, avoided with the two sides contact relative to smoothing roll and if possible relative to guide roller, this contact may cause surface damage in the band of iron scale.
Preferably guide roller (or other smoothing roll) is set in the first smoothing roll upstream.Preferably guide roller (or other smoothing roll) is set in the second smoothing roll downstream, alternatively, can guide roller be set in each smoothing roll upstream or guide roller is set in each smoothing roll downstream, wherein, described (adding) guide roller also can be replaced by (adding) smoothing roll.One or more guide roller (or additional smoothing roll) equally can transverse to the traffic direction adjustment of band.Therefore, smoothing roll can relative to one or more (fixing) guide roller adjustable, or guide roller can relative to (fixing) smoothing roll adjustable.Alternatively, can smoothing roll be not only also adjustable but also guide roller is also adjustable.In any case smoothing roll and guide roller all realize layout closely, to produce the elongation or compression ratio of wishing in band front or band reverse side.By compact Layout smoothing roll and guide roller, also not tension stretch by time or in band, tensile stress is very little time force more than 2%, preferably greater than 3% sideline elongation/compression ratio.Sideline elongation/compression ratio refers to the elongation/compression ratio on band front or band reverse side.
Therefore, smoothing roll with the spacing of optional guide roller and selecting like this with the adjustment of optional guide roller of smoothing roll, make to be with and can accept following maximum circular diameter under the state of not tension stretch, maximum three times of equaling smoothing roll diameter of described circular diameter, preferably equal the twice of smoothing roll diameter.Smoothing roll and guide roller therefore such near-earth are set up in parallel and adjust with such submerged depth, even if make with still can the circular diameter of accommodation zone to greatest extent during not tension stretch, described circular diameter more than the maximum of three times of smoothing roll diameters, preferably even cannot can not exceed the maximum of the smoothing roll diameter of only twice.Then with by moment of flexure and possible (little) tensile stress setting sweep produce bending radius, smoothing roll radius is equaled for thinner this bending radius of being with.Under following this background, meet object, smoothing roll diameter is so littlely selected, even if make also to reach more than when tape thickness is minimum 2%, (surface) elongation preferably greater than 3%.Meet object, smoothing roll has the maximum diameter being five times in the minimum tape thickness that will process in the device for this reason.For thicker band, bending radius is set like this by the adjustment of smoothing roll and possible guide roller, makes to produce the maximum sideline elongation more than 3% or face extensions rate.
When considering the fact that the bending loss produced on smoothing roll increases along with tape thickness usually, the present invention proposes, at outlet side also therefore at smoothing roll downstream generating strap tensile force, described band tensile force at least exceeds the band tensile force at entrance side with the amount of deformation loss.Therefore with under be in such band tensile stress at outlet side, this band tensile stress is enough to that driving with final guide roller cooperatively interacts makes up all deformation loss produced in the device.Usually, produced by the tensile force that batches of coiling machine at the band tensile force of outlet side.When tape thickness is very large, deformation loss may become so large, so that exceeds available power (such as batching tensile force) at the band tensile force that outlet side is required.Then restriction or the adjustment of minimizing smoothing roll in this case.
In each case, equipment investment according to the present invention also can be made in the production line not having continuous band, such as, put in continuous pickling line.This production line uses mainly for large tape thickness (such as the maximum 16mm of reaching).In such continuous pickling line, take the lead usually to be uncoiled machine by being driven across pickling unit to coiling machine in the drive train of entrance side.Meet object at this, such as drive in continuous pickling line and take the lead through discale device, wherein, adjustable smoothing roll (with possible guide roller) first stops, and makes to take the lead can be driven through without any problems between each roller.Take the lead can be pushed forward into until coiling machine, produced at the required band tensile force of outlet side by this coiling machine.Following adjustment smoothing roll (with possible guide roller).In this case, the belt length of discale device is back to not by pre-de-scaling from coiling machine.Therefore (at the outlet side) drive train that directly can arrange in discale device downstream that at least one is other at outlet side alternatively, can produce necessary band tensile force by this drive train.(at outlet side) drive train once take the lead to pass through, then drive train is just closed and is formed band tensile force.Therefore can make not minimized by the belt length of pre-de-scaling by the additional drive train at outlet side.This is adapted to pass through the magnetic tape trailer of discale device equally.From the certain residue number of turns on coiling machine, uncoiling tensile force and the tensile stress in band worked at entrance side thus can disappear.Therefore may increase the bending radius on smoothing roll and reduce discale effect.Occur to stop it, according to possibility of the present invention, can arrange drive train at entrance side, this drive train produces the band tensile force at entrance side in order to make band pass through, make except from the drive train of entrance side to the belt length of smoothing roll, magnetic tape trailer is pre-de-scaling alternatively.
At this within the scope of the present invention, such as smoothing roll and/or guide roller is driven in order to make up a part for deformation loss.
According to the present invention other suggestion propose: adjustable roller is set in last smoothing roll (or last guide roller) downstream, carries out residual bend correction by this roller.In this present invention from following understanding: by producing plasticity residual bend around smoothing roll carries out strong plastic bending in band.This plasticity residual bend is eliminated by least one adjustable roller of adjustment or is minimized.Therefore, be with and utilize at least one roller by such back-flexing after around smoothing roll plastic bending, make plasticity residual bend residual or only residual not little in band.Preferably, be designed to dimensionally at the diameter of this roller, even if make minimum tape thickness still can be bent over yield limit.Alternatively, roller can be driven.
Within the scope of the invention, iron scale smoothing roll is broken is sucked away or is washed away by (fluidised form or gaseous state) medium or blown away.Avoid the heap sum in smoothing roll region to bond by this way, make the surface damage avoided especially on tape.
According to the present invention, smoothing roll has relatively little diameter.Preferably, smoothing roll has the diameter being less than 50 times of minimum tape thickness to be processed.Therefore may meet object, use and there is the smoothing roll being less than 100mm diameter.Smoothing roll diameter is preferably so littlely selected, even if so that still reach enough edge elongations when tape thickness is minimum.Meeting object at this is, supports smoothing roll in case flexure by backing roll, arranges two backing rolls wherein preferably to each smoothing roll.Backing roll diameter and smoothing roll diameter ratio are preferably≤1.5, especially preferably≤1.25.Therefore within the scope of the present invention, the backing roll with relatively little diameter is used, desired compact geometry can be realized.Align (wherein with multiple roll, two smoothing rolls in succession arranged can be supported by common " middle access " backing roll) different, the present invention preferably proposes: to smoothing roll or each smoothing roll arrange respectively at least two self or two independent backing rolls.Therefore, each smoothing roll is supported separately respectively, and each backing roll is only arranged to a unique smoothing roll.
Guide roller preferably has the diameter of 150mm to 600mm, especially preferably 200mm to 300mm.Can realize such guide roller by such diameter, it can receive sufficiently high power on the one hand, and realizes the layout to the important compact geometry of the present invention on the other hand.
Therefore, described method be not only in theme of the present invention, and be a kind of equipment for implementing this method.Such equipment at least has the first smoothing roll and the second smoothing roll.Preferably, at least one guide roller is set in the first smoothing roll upstream, and at least one guide roller is set in the second smoothing roll downstream.Respectively guide roller is set in upstream and guide roller is set in downstream also can to alternatively each smoothing roll.Preferably, this external entrance side of this equipment has uncoiler and has coiling machine at outlet side, and wherein said coiling machine is not be set directly at discale device downstream usually, but is arranged on de-scaling unit or pickling unit downstream.Therefore descaling device is arranged on discale device downstream, and wherein, this descaling device such as can be configured to acid dip pickle.But alternatively, other descaling device also can be used, such as injection apparatus.Suggestion according to other proposes: the drive train being arranged on outlet side in last smoothing roll (or guide roller) downstream.Alternatively or addedly, the driving mechanism of entrance side can be arranged in the first smoothing roll (or guide roller) upstream.
In order to ensure the automatic operation of this equipment and be adjusted to roughly the same bending radius on two smoothing roll, advantageously, for given band data, in advance go out best method for roller adjustment by calculated with mathematical model, this Mathematical Modeling is to major general's tape thickness, bandwidth, yield limit, E-module, roller diameter and roller geometry, consider as parameter in the band tensile stress of entrance side and the loss of caused bending.
Within the scope of the invention, for the tape thickness scope of hope, be provided with the first smoothing roll and the second smoothing roll, that is smoothing roll pair, wherein, smoothing roll can be arranged on the traffic direction of band in succession by direct, or respectively arranges two guide rollers to each smoothing roll.In order to expand the scope of application of such equipment, also can arrange alternatively two smoothing rolls to or the smoothing roll pair that also can be set to more than two, wherein, the right smoothing roll of the first smoothing roll has the different diameter of the smoothing roll right from the second smoothing roll.Therefore there is following possibility, that is, right every of these smoothing rolls is used in specific tape thickness scope for a pair, can optimize discale.Therefore within the scope of the invention, arrange the first smoothing roll pair, it has the smoothing roll that smoothing roll diameter is less than the right smoothing roll diameter of the second smoothing roll.So the first smoothing roll is to the discale be used in when strip, and second smoothing roll with larger smoothing roll diameter uses when being with thicker.Also meet object in this case, each backing roll has less or larger diameter.In any case less smoothing roll diameter can be utilized to improve bending effect when being with thinner.But the bending force produced when tape thickness exceedes additional backing roll load.Therefore, use when tape thickness and there is larger-diameter second smoothing roll to being favourable.
Equally can meaningfully, when be with entrance side not tension stretch time or the bending radius of the setting when the tensile stress of entrance side is very little still excessive for effective de-scaling time, use two smoothing rolls pair.Due to around the first smoothing roll to the deformation loss produced time bending, improve, at the first smoothing roll, therefore the band tensile force of the right entrance side of the second smoothing roll improved to the band tensile force of downstream in band.Be greater than in bending radius in the band of smoothing roll radius thus, be adjusted to less bending radius, that is, increase face extensions rate and compression ratio and increase discale effect thus.Also the more smoothing roll pair for improving band tensile force can be used if desired.By improving band tensile force, so in band, also produce (little) extensibility, to realize the improvement of the flatness of band.
Especially preferably, discale device according to the present invention can be used on the production line without continuous band, such as continuous pickling line.But alternatively, compared to extension detorsion equipment, also discale device according to the present invention can be used in the production line with continuous band as economic flexible program.
Accompanying drawing explanation
Next by only illustrating that the accompanying drawing of an embodiment elaborates the present invention, wherein:
Fig. 1 illustrates for utilizing discale device to carry out the equipment of de-scaling to hot-rolled strip with the view very simplified,
Fig. 2 illustrates described discale device with enlarged drawing,
Fig. 3 illustrates an embodiment changed of the theme according to Fig. 2, and
Fig. 4 illustrates another embodiment of the theme according to Fig. 2.
Detailed description of the invention
Fig. 1 illustrates the equipment for carrying out de-scaling to hot-rolled strip 1, and wherein, described band 1 is uncoiled machine 2 uncoiling and is wound on coiling machine 5.Pre-de-scaling is carried out in (mechanical type) discale device 3, and in described discale device, the iron scale on belt surface is broken, to ensure the acid attack better, in the de-scaling unit being in downstream or pickling unit 4.The discale device 3 that theme of the present invention especially only schematically illustrates in FIG.The different embodiment of described discale device 3 shown in Fig. 2 to 4.Discale device 3 has at least one smoothing roll to P, and this smoothing roll is to having two smoothing rolls 6,7 of in succession arranging on the traffic direction of band, and wherein, metal tape 1 is around each smoothing roll 6,7 directed and stand alternating bending thus.In the embodiment shown in Figure 2, guide roller 8 is set in the first smoothing roll 6 upstream, and guide roller 9 is set in the second smoothing roll 7 downstream.In the embodiment shown, (above) smoothing roll 6 and (above) guide roller 9 can adjust transverse to the traffic direction of band, and (below) smoothing roll 7 and (below) guide roller 8 can be arranged regularly by position.Smoothing roll 6,7 is supported by backing roll 12 respectively.Each smoothing roll is equipped with two backing rolls respectively, and wherein, each backing roll only arranges to a unique smoothing roll.Each roller is shown by double-head arrow transverse to the adjustment capability of the traffic direction of band.
According to the present invention, in the mode of detorsion, that is by carrying out discale around the bending of smoothing roll 6,7, wherein, 1 is with to be that tension stretch or only have is not less than the yield limit of 10% of band, is preferably less than the little tensile stress of 25MPa at entrance side (that is in the upstream of smoothing roll 6,7 and guide roller 8,9).Show in diagram that, the diameter of each smoothing roll and its spacing to each other and being so selected with the spacing of each smoothing roll and the adjustment of smoothing roll and guide roller on the traffic direction of band, to make in the first plastic bending process around smoothing roll 6 and produce on band front and band reverse side around smoothing roll 7 in the second plastic bending process at least 2%, preferably at least 3% extension and compression.According to the present invention, carry out discale by the alternating bending of not tension stretch, that is different from extension detorsion, eliminate the overall elongation (extensibility) of plasticity.However still carried out discale effectively, the acid corrosion of acid or the effect of follow-up mechanical descaling method (as brushing away or shot-peening) are significantly improved when not producing extensibility.According to the present invention, this by smoothing roll 6,7 to each other or smoothing roll 6,7 realize relative to the compact Layout of guide roller 8,9, and consider each roller diameter.By the compact Layout of guide roller 8,9 and smoothing roll 6,7, also not tension stretch by time or in band, tensile stress is very little time, force to be greater than 2%, to be preferably greater than the bending extension of 3%.Spacing between guide roller 8,9 and smoothing roll 6,7 and adjustment thereof or submerged depth set like this, make band 1 can accept greatest circle diameter K on smoothing roll 6,7, this circular diameter is maximum equals three times of smoothing roll diameters, preferably maximumly equal twice smoothing roll diameter.This is shown in diagram that by (void) line K.Even if when band 1 is not guided by shown arrangement to tension stretch, band still can circular diameter K described in maximum acceptance, and this comes from the compact Layout of smoothing roll 6,7 and guide roller 8,9 and set submerged depth.
In this embodiment roller 11 is set at the smoothing roll 7 of outlet side or its guide roller 9 downstream, carries out residual bend correction by this roller.In the opposed faces of band, another guide roller 10 is provided with between guide roller 9 and roller 11.
In addition visible, be provided with drive train 13 at entrance side and be provided with drive train 14 at outlet side.In continuous pickling line, there is following possibility: the taking the lead of reel is driven by discale device 3, wherein, first adjustable smoothing roll and guide roller stop.Refer to smoothing roll 6 and guide roller 9 as in the case of the embodiment according to fig. 2 and may also have roller 11, first they stop.Take the lead can be pushed forward in principle into until coiling machine 5, then produce the required band tensile force at outlet side by this coiling machine.Then just smoothing roll 6 and guide roller 9 is adjusted.In this case, until coiling machine 5 and date back the belt length of discale device 3 may not by pre-de-scaling.Can be minimized not by the belt length of pre-de-scaling by the drive train 14 being set directly at this discale device downstream at outlet side.Because necessary band tensile force can be produced by described drive train 14.Once take the lead by drive train 14, then this drive train is just closed and forms band tensile force.This is suitable for the magnetic tape trailer through discale device 3 of reel equally.Once from the certain residue number of turns on uncoiler, uncoiling tensile force and the tensile stress worked at entrance side thus disappear in band, there is the possibility that discale effect reduces so in principle.In order to stop it to occur, install drive train 13 at entrance side, this drive train produces the band tensile force of entrance side to make band 1 pass through, thus except from the drive train 13 of entrance side until except the belt length of smoothing roll magnetic tape trailer by pre-de-scaling best.
Fig. 3 illustrates the embodiment of a change of the present invention, wherein in order to alternating bending is provided with the first smoothing roll 6 and the second smoothing roll 7 equally.According to Fig. 2 only guide roller 8 be arranged on the first smoothing roll 6 upstream and only a guide roller 9 is arranged on the second smoothing roll 7 downstream, and Fig. 3 illustrates an embodiment, and wherein, each smoothing roll 6 or 7 is equipped with two guide rollers 8,8 ' or 9,9 ' respectively.Guide roller 8,8 ' arranges to smoothing roll 6 and is arranged on opposed band side, and guide roller 9,9 ' arranges to smoothing roll 7 and be arranged on equally on opposed band side.Meet object in this case, two smoothing rolls 6,7 are adjustable, and guide roller 8,8 ' or 9,9 ' can be arranged regularly by position.Adjustment capability is illustrated by double-head arrow again.
Fig. 4 illustrates another possibility of the present invention.Be provided with in the embodiment according to figure 4 two smoothing rolls respectively with two smoothing rolls 6,7 to P, P ', make " doubling " of being finally equivalent to the embodiment according to Fig. 2 according to the embodiment of Fig. 4.First smoothing roll comprises the smoothing roll 6,7 of the minor diameter with such as 50mm to 60mm to P, and the second smoothing roll comprises the larger-diameter smoothing roll 6,7 with such as 70mm to 80mm to P '.The diameter of guide roller can be such as 250mm.So, utilize and can cover great tape thickness region according to the discale device of Fig. 4, because smoothing roll uses when different tape thickness P or P '.The first smoothing roll such as can be used P for thinner band, the smoothing roll with larger guide roller and backing roll can be used P ' for thicker band.Because utilize less smoothing roll diameter can improve bending effect in thinner band.But for the bending force produced in thicker strip, beyond additional backing roll load, thus use has larger-diameter second smoothing roll pair when thicker strip.But alternatively, use two smoothing rolls may also be significant to P and P ', and when when be with entrance side not tension stretch time or the bending radius set when entrance side tensile stress is very little still excessive for effective de-scaling be significant.By when bending around the deformation loss that the first smoothing roll is formed P, improve, at the first smoothing roll, therefore the second smoothing roll improve to the band tensile force of P ' at entrance side to the band tensile force in the band in P downstream.Thus, be greater than in bending radius in the band of smoothing roll diameter and be adjusted to less bending radius, that is increase sideline elongation and compression ratio and also increase discale effect thus.
Claims (19)
1. one kind for band iron scale metal tape, especially there is the method for carrying out discale more than 1mm, such as 1.2mm to the hot rolled metal strip of 16mm thickness, wherein, described band around at least two on the traffic direction of band the smoothing roll that in succession arranges directed and stand alternating bending at this, wherein, smoothing roll described at least one can be adjusted transverse to the traffic direction of band
It is characterized in that, described band is under at entrance side, in smoothing roll upstream, tension stretch or be in is less than the little tensile stress of the yield limit of 10% of band, and
The diameter of each smoothing roll and their spacing on the traffic direction be with and they be so selected when considering band characteristic transverse to the adjustment of the traffic direction of band, make on band front and band reverse side, produce at least 2%, preferably at least 3% in the process of the first plastic bending on the first smoothing roll and the second plastic bending on the second smoothing roll in order to discale elongation and compression ratio.
2. in accordance with the method for claim 1, it is characterized in that, in described first smoothing roll upstream, guide roller (or other smoothing roll) is set, and in described second smoothing roll downstream, guide roller (or other smoothing roll) is set, wherein, guide roller described at least one (or smoothing roll) can be adjusted, and the spacing on the traffic direction of band between smoothing roll and guide roller and aligning are rectified and are so selected with the adjustment of guide roller transverse to the traffic direction of band, make to produce at least 2% in band front and band reverse side in the process of plastic bending, the percentage elongation of preferred at least 3% and compression ratio.
3. according to the method described in claim 1 or 2, it is characterized in that, being so selected with the adjustment of optional guide roller of the spacing of described smoothing roll and the spacing of optional guide roller and smoothing roll, make described band can accept following maximum circular diameter on smoothing roll under the state of not tension stretch, described circular diameter is maximum equals three times of smoothing roll diameter, the preferred maximum twice equaling smoothing roll diameter.
4. according to the method one of claims 1 to 3 Suo Shu, it is characterized in that, in the process of the first plastic bending and the second plastic bending, bending radius is identical or substantially the same.
5. according to the method one of Claims 1-4 Suo Shu, it is characterized in that, at outlet side generating strap tensile force, this band tensile force at least exceeds the band tensile force of entrance side with deformation loss amount.
6. according to the method one of claim 1 to 5 Suo Shu, it is characterized in that, the spacing between the smoothing roll of two direct neighbors and/or the roller surface of guide roller is greater than tape thickness all the time.
7. according to the method one of claim 1 to 6 Suo Shu, it is characterized in that, adjustable roller is set in last smoothing roll (or last guide roller) downstream, carries out residual bend correction by this roller.
8. according to the method one of claim 1 to 7 Suo Shu, it is characterized in that, described smoothing roll has diameter that be less than 50 times of minimum tape thickness, that be such as less than 100mm.
9. according to the method one of claim 1 to 8 Suo Shu, it is characterized in that, described band to be in the tensile stress being less than 25MPa in smoothing roll upstream at entrance side under.
10. according to the method one of claim 1 to 9 Suo Shu, it is characterized in that, the iron scale that smoothing roll is broken is sucked away or is washed away by (liquid or gaseous state) medium or blown away.
11., according to the method one of claim 1 to 10 Suo Shu, is characterized in that, described band is directed around multiple smoothing roll, and each smoothing roll is supported by backing roll respectively, and wherein, preferred each smoothing roll is equipped with at least two self backing rolls respectively.
12. 1 kinds for utilizing according to the described method of one of claim 1 to 11 band iron scale metal tape (1), especially have more than 1mm, the hot rolled metal strip of such as 1.2mm to 16mm thickness carries out the equipment of discale, the second smoothing roll (7) that this equipment at least has the first smoothing roll (6) and arranges in the first smoothing roll downstream, wherein, in described first smoothing roll (6) upstream, guide roller (8) (or other smoothing roll) is set, and in described second smoothing roll (7) downstream, guide roller (9) (or other smoothing roll) is set,
It is characterized in that, described band (1) is under at entrance side, in each smoothing roll (6,7) upstream, tension stretch or be in is less than the little tensile stress of the yield limit of 10% of band, and
The diameter of smoothing roll (with optional guide roller) and their spacing on the traffic direction be with and they be thus set when considering band characteristic transverse to the adjustment of the traffic direction of band, make in the process of the first plastic bending and the second plastic bending, produce at least 2%, preferably at least 3% in band front and band reverse side elongation and compression ratio.
13., according to equipment according to claim 12, is characterized in that, described guide roller (8,9) has the diameter larger than smoothing roll (6,7), is preferably greater than the twice of smoothing roll diameter.
14. according to the equipment described in claim 12 or 13, it is characterized in that, described smoothing roll (6,7) is supported by backing roll (12) in case flexure, wherein, each smoothing roll is preferably equipped with at least two self backing rolls respectively, or each backing roll only arranges to a unique smoothing roll.
15., according to equipment according to claim 14, is characterized in that, backing roll diameter and smoothing roll diameter ratio maximum be 1.5, preferably maximum 1.25.
16., according to the equipment one of claim 12 to 15 Suo Shu, is characterized in that, described guide roller (8,9) has from 150mm to 600mm, diameter preferably from 200mm to 300mm.
17. according to the equipment one of claim 12 to 16 Suo Shu, it is characterized in that, adjustable roller (11) is set at last smoothing roll (7) or last guide roller (9) downstream, carries out residual bend correction by this roller.
18. according to the equipment one of claim 12 to 17 Suo Shu, this equipment has at least one uncoiler (2) and at least one coiling machine (5), wherein, at entrance side and/or outlet side, one or more drive train (13,14) is set in each smoothing roll (6,7) upstream and/or downstream.
19. according to the equipment one of claim 12 to 18 Suo Shu, this equipment has two or more smoothing rolls to (P, P '), wherein, first smoothing roll has different diameters with the second smoothing roll to the smoothing roll (6,7) of (P) compared with the smoothing roll (6,7) of (P '), wherein, preferably only described smoothing roll to one of or two smoothing rolls can be adjusted in optional mode.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012103366.8 | 2012-04-18 | ||
| DE102012103366A DE102012103366A1 (en) | 2012-04-18 | 2012-04-18 | Method and apparatus for crushing a scale-damaged metal strip |
| PCT/EP2013/057128 WO2013156316A1 (en) | 2012-04-18 | 2013-04-04 | Method and device for descaling a scaled metal strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104245171A true CN104245171A (en) | 2014-12-24 |
Family
ID=48050021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380020462.3A Pending CN104245171A (en) | 2012-04-18 | 2013-04-04 | Method and device for descaling a scaled metal strip |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20150052717A1 (en) |
| EP (1) | EP2838676A1 (en) |
| CN (1) | CN104245171A (en) |
| DE (1) | DE102012103366A1 (en) |
| WO (1) | WO2013156316A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105828964A (en) * | 2014-02-27 | 2016-08-03 | 伊万·季莫费耶维奇·托茨基 | Method for preparing hot-rolled semifinished steel rolled stock for cold rolling |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014101159B4 (en) * | 2014-01-30 | 2016-12-01 | Thyssenkrupp Steel Europe Ag | Process for the surface treatment of workpieces |
| CN104475448B (en) * | 2014-10-22 | 2016-08-24 | 山东钢铁股份有限公司 | A kind of production technology of prevention paper-thin steel coil " sag " defect |
| CN109500106A (en) * | 2018-12-28 | 2019-03-22 | 北京京诚之星科技开发有限公司 | A kind of scale breading withdrawal straightening machine |
| CN114769365B (en) * | 2022-04-22 | 2023-10-20 | 浙江福达合金材料科技有限公司 | Equipment for straightening lateral bending of composite strip |
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- 2012-04-18 DE DE102012103366A patent/DE102012103366A1/en not_active Ceased
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- 2013-04-04 CN CN201380020462.3A patent/CN104245171A/en active Pending
- 2013-04-04 WO PCT/EP2013/057128 patent/WO2013156316A1/en active Application Filing
- 2013-04-04 EP EP13714641.1A patent/EP2838676A1/en not_active Withdrawn
- 2013-04-04 US US14/382,145 patent/US20150052717A1/en not_active Abandoned
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| CN105828964A (en) * | 2014-02-27 | 2016-08-03 | 伊万·季莫费耶维奇·托茨基 | Method for preparing hot-rolled semifinished steel rolled stock for cold rolling |
| CN105828964B (en) * | 2014-02-27 | 2018-03-13 | 伊万·季莫费耶维奇·托茨基 | The method for carrying out cold rolling with rerolling quality steel stocking |
Also Published As
| Publication number | Publication date |
|---|---|
| US20150052717A1 (en) | 2015-02-26 |
| EP2838676A1 (en) | 2015-02-25 |
| WO2013156316A1 (en) | 2013-10-24 |
| DE102012103366A1 (en) | 2013-10-24 |
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Application publication date: 20141224 |