Sheet metal strip cold-rolling equipment and method
Technical field
The present invention relates to a kind of sheet metal strip cold-rolling equipment and method.
Especially, the present invention relates to the rolling stand by steel rolling equipment or milling train cold rolled metal strip, especially rolling needs some alloy using small diameter roller, such as stainless steel, silicon steel or some nonferrous alloy.These metal alloys are rolled in the equipment comprising at least one multi-roll mill seat, and such as, 12 rollers (high) or 20 roller mills, namely equip the milling train of 12 or 20 rollers.
Background technology
Known, the rigidity that the roll that in rolling stand, diameter is less has can not be born rolling stress and not bend.Its therefore in rolling stand by support or backing roll and wheel support.Typically, 20 roller mills are made up of the upper assembly of ten rolls and the lower assembly of ten rolls, each assembly is arranged according to pyramid or tufted, comprise and treat that strip contacts and the working roll supported by two backing rolls, backing roll itself is supported by three backing rolls, backing roll itself is supported by four row's bogie wheels, and each row's bogie wheel is made up of multiple bogie wheel be arranged on unique axle of bearing wheels.
But the cluster of this roller arranges the distortion being not enough to avoid because working roller bending causes, thus makes by the cross section central part of strip thicker than edge part.
At traditional milling train, such as, in four roll shape milling trains, by the change in strip cross section usually by more or less more complicated band cross section correction system, be commonly referred to " crown control (Crown control ") ", namely roll crown and straightening system are corrected.Described system such as allows to give backing roll convex shape, thus opposing working roll is bending.
When multi-roll mill, propose the solution based on Crown control system very early.Therefore, US3147648 describes many roller rolling machines that equipment is in a conventional manner used for applying the jack of thrust in the structure carrying assembly on roll, and described thrust causes the roll-force substantially equaling described thrust and described upper lightweight packages summation.The feature of this milling train is that the bogie wheel forming upper assembly equips the centrifugal mechanism activated by tooth bar.Centrifugal mechanism allows described rotating shaft of taking turns to diverge to the longitudinal axis of the axle in bearing wheels, such as reach.Thus, the contact wire between its skate supported and roller can obtain adjustment, thus gives its straight or bending direction, with the detorsion of applicable working roll.
The more modern equipment such as, described in EP0580292 have employed such design again, wherein, upper assembly and lower assembly compress by compression jack, and arrange upper bogie wheel and two by actuating two and arrange the centrifugal device that lower support takes turns and realize independently Crown control system.Still based on same principle, WO03/061864 describes the equipment of equipment tooth bar, and the radian of working roll corrected by described tooth bar by acting on the upper bogie wheel of four rows.Implement in modification described by WO93/05898 or WO01/94042 one, the effect curving through multiple wedge system of wheel reach obtains.
It's a pity, the known permission of tradesman controls to treat that the multi-roll mill in strip cross section especially has following shortcoming:
The mechanical complexity that – is with the Crown control system of tooth bar or voussoir excessive, improves production and maintenance cost on the one hand, too increases the risk of fault simultaneously on the other hand;
The reaction time that – improves makes to handle Crown control system in real time according to the geometry recorded by strip and becomes difficulty;
-for the roll-force be distributed on different wheel, cannot be controlled it by the position that Crown control system is given according to it;
-when monolithic devices rolling stand, because bulk deformation (described bulk deformation is called as at present " support convexity) occurs described rolling stand under the effect of roll-force; thus before being measured by the suitable measurement systems be positioned at below described rolling stand and confirming described change, can not correct the change of the thickness of band and/or section.
Summary of the invention
The object of the invention is to propose to solve the milling train of above-mentioned shortcoming and the method for cold rolled metal strip.
Under this object, milling train and cold rolling process are proposed.
One group of dependent claims proposes advantage of the present invention equally.
From being used for the multi-roll mill of the equipment equipping cold rolling sheet metal strip to be rolled, described milling train comprises:
The upper assembly of –, it comprises roll, such as n roll, described upper assembly is arranged in the cavity of described milling train, or especially in the rolling stand cavity of described milling train, be positioned at the top of described band travel plane, lower assembly, it comprises roll equally, such as n roll, be positioned at another cavity of described milling train, in the face of described upper assembly, and be in the below of described band travel plane, described upper and lower assembly is used for coordination with one another thus band is born can allow the roll-force that is rolled, and especially, n equals 10;
The each assembly of – comprise supported by backing roll be used for and treat the working roll that strip contacts, backing roll itself is supported by backing roll, and backing roll itself supports by arranging bogie wheel more, each working roll is supported by two backing rolls especially, backing roll itself is supported by three backing rolls, and backing roll itself is supported by four row's bogie wheels;
– respectively arranges bogie wheel and comprises the multiple bogie wheels be arranged on wheel reach;
At least one row's bogie wheel of the upper assembly of –, on the direction being basically perpendicular to band travel plane, is activated by multiple bogie wheel actuator;
Milling train according to the present invention is characterised in that:
The direction of band travel plane is basically perpendicular to described in the actuator energy edge of each bogie wheel of –, particularly rest on described reach by least one movable part of described actuator, and use cam or wedge shoe system in mode freely, on the reach of a described skate, directly apply a local power, described actuator such as comprises jack, jack comprises hollow body especially, the movable piston of energy Mobile Equipment bar in this main body, and therefore described movable part is the supporting device of the one end of the described bar being positioned at described piston, and for being bearing on described reach, or be usually bearing at least one reach,
– can apply the bogie wheel actuator quantity of described local power on the reach of same row's bogie wheel, at least equals the quantity of described same row's bogie wheel;
– it comprise manipulation device, can each actuator described in individual operation especially, thus make the local power sum applied by each actuator of milling train substantially equal described roll-force.In addition, especially, described manipulation device basis can handle described actuator at least one thickness measurements of milling train exit band and/or roughness measurement value, thus where necessary, gap change between the convexity of working roll and degree of deformation and/or double-working is corrected, thus via thickness and/or the flatness of the actuating conditioning strip material of described actuator.
From the milling method being treated strip by rolling equipment, the feature according to milling method of the present invention is, it comprises the following steps:
– is before starting rolling to described band: by applying the actuator of at least one bogie wheel of local power at least one reach of row's bogie wheel, receive presetting initial order, and described actuator activates according to described presetting initial order;
– is during the rolling of described band:
-especially by the thickness measure mechanism of band described at least one, at least measure the described thickness of strip in milling train exit;
-especially by the roughness measurement mechanism of band described at least one, at least measure the described strip flatness in milling train exit;
-by each thickness measure mechanism and each roughness measurement mechanism, transmit each thickness measurements and each roughness measurement value respectively to manipulation device;
-via described manipulation device, by sending the regulating command preset to described actuator, by described manipulation device according at least described thickness and/or roughness measurement value, handle the actuating of at least one actuator.
Especially and better, the described step one time launched during the rolling of described band connects one and is cycled to repeat everywhere, thus formed circulation is reviewed to band cross section and/or THICKNESS CONTROL.Milling train according to the present invention and described method can control the gap between double-working on the one hand, and roll-force can be distributed along bogie wheel reach on the other hand, thus make the local power sum applied by the actuator of bogie wheel equal general rolling force, and allow in the operation of rolling to born by described actuator and because of band in working roll gap by generation roll-force carry out real-time dynamic management, and for the known milling train of industry technology personnel, also there is not the described management to roll-force.Local according to the present invention power is actual is the component of described roll-force.In other words, better, the multiple actuators acted on a skate reach allow, while the described roll-force of applying, to carry out Crown control by the difference action of each actuator on described reach.Such as, for the roll-force x represented by newton and the milling train comprising the y row bogie wheel that can be activated by described actuator, each reach comprises n bogie wheel, especially, can count n or n+1 actuator according to milling train of the present invention, and the local power applied on described reach by each actuator i is respectively x/ (ny) ± t usually
ior x/ (y (n+1)) ± t
i, t
ibe usually be defined as making two adjacent local power, such as, adjoin the ratio of the local power of distribution along reach, between interval [0.8; 1.2] adjustment force.
Better, can according to the change of roll-force according to manipulation device of the present invention, such as by cooperating with at least one bogie wheel actuator, the change (such as, the described deflection of rolling stand) that compensation thickness of strip and section produce because the change of rolling stand bulk deformation.Especially, the position-measurement device that be bearing in the described movable part of described reach of at least one actuator equipment to described actuator, and at least one actuator cooperates with described manipulation device, thus the described deflection of reeler seat.Such as, described manipulation device can send at least one correcting signal to actuator, at least one institute's position measurement device of its movable part equipped by described actuator, such as position sensor, described correcting signal especially can according to rolling stand relative to the deformation curve of thrust and/or the distribution curve of thrust between different actuator, the rectification of manipulation to the described movable part position of described actuator, the described clamping force be now added in lightweight packages equals roll-force substantially.Especially, described deformation curve and distribution curve are determined by experiment or calculating.Therefore, change relevant thickness of strip and/or the change of section to roll-force, even can be compensated before the thickness of described band and/or roughness measurement mechanism record.Therefore, especially, the feature according to milling train of the present invention is, at least one actuator equipment is bearing in the position-measurement device of the movable part of the described actuator on described reach, further, manipulation device can dynamically associate the position of the movable part of described actuator and thickness of strip.Better, method according to the present invention is therefore in the operation of rolling, can comprise by least one actuator, or the measurement of the described local power applied by each actuator of bogie wheel especially, and the described measured value of local power is to the transmission of described manipulation device.
Preferably, the cross section of each described local power and described band can be dynamically associated according to manipulation device of the present invention, can the relevant database treating strip especially such as by connecting with manipulation device, or by the data relevant to the measurable described band in described milling train exit, such as by respectively thickness or roughness measurement value being transferred at least one thickness measure mechanism and at least one roughness measurement mechanism of described manipulation device, pre-determine cross section.Better, the local power applied by each actuator can be different from the local power produced by adjacent bogie wheel actuator, and the power sum generated by all bogie wheel actuators, under any circumstance all equals thrust, and substantially equal roll-force.
Especially, feature according to milling train of the present invention is, it comprises first group of actuator and second group of actuator that can apply each described local power at least one reach, each actuator of first group of actuator the supporting area between the wheel that two at described reach are adjacent can apply described local power, and second group of actuator comprise can on described reach one end, before the first round carried by described reach, apply the first actuator of described local power, and on the other end of reach, after last carrying by described reach is taken turns, apply the second actuator of described local power.In other words, second group of actuator comprises two actuators, such as the first and second actuators, and it is positioned on the difference end of reach separately, and the bogie wheel that direct neighbor is unique, and the actuator of described first group applies described local power respectively between two adjacent wheels.Therefore, in the first embodiment, if reach comprises n wheel, n-1 the actuator of first group can such as be comprised according to milling train of the present invention, and described two actuators of second group.
In this second embodiment, especially, the feature according to milling train of the present invention is, each actuator can at least one reach, and carried by described reach one takes turns both sides, applies described local power.According to the second embodiment, if reach comprises n wheel, thus milling train will comprise n actuator, and each actuator can apply described local power in same both sides of taking turns.
Better, described bogie wheel actuator particularly can to the hydraulic jack of the regulating command real time reaction sent by described manipulation device, and it comprises a movable part, and one end of movable part ends at a supporting device of the directly described reach of supporting.In addition, especially, each actuator separately can be handled and can be received such as from least one independently regulating command that described manipulation device sends, and generates the component of the necessary described roll-force of rolling.Preferably, local power can be applied on two reach according to actuator of the present invention simultaneously.Such as, especially, two row's bogie wheels of upper assembly, can along the described direction being basically perpendicular to band, activated by multiple bogie wheel actuators of each reach that can directly act on each bogie wheel of described two row separately, and the bogie wheel actuator quantity simultaneously acted on the reach of described two row's bogie wheels, at least equal the quantity of single wheel.
Especially, according to described first embodiment, the single actuator be made up of first and second groups of actuators can act on each reach of two row's bogie wheels simultaneously, and two row's bogie wheels such as respectively comprise n+1 bogie wheel actuator of described two row's actuators.Equally, according to described second embodiment, single actuator can act on each reach of two row's bogie wheels simultaneously, and two rows such as respectively comprise n bogie wheel, thus can be activated by n bogie wheel actuator of described two row's actuators since then.
Preferably, described actuator is or comprises the hydraulic jack of hollow body, the piston comprising a bar moves wherein, piston one end is stopped by a supporting device, described supporting device is for particularly by being directly bearing in described reach, at least one reach applies local power, the feature of described piston is, at least its head has the cross section (such as rectangle) of elongating along band direct of travel, now described hydraulic jack is installed in milling train, and described supporting device has complementary geometry and matches with the geometry of described reach.
The described cross section that jack according to the present invention elongates on band direct of travel, compared with using the traditional jack comprising circular cross-section, greatly can increase the piston cross-section that hydraulic coupling applies the described jack on it better, for there are along reach length two contiguous actuator of uniform distances, the circular cross-section of tradition jack must reduce, on the described direction being basically perpendicular to band travel plane, each space arranged of taking turns top could be entered.Therefore, the described elongation cross section of described jack allows with the pressure reduced, and being namely less than can applied pressure with the circular jack jack that is feature, applies described local power.Than this pressure that traditional jack reduces, allow the circulation that limiting element cost and oil plant generate and distribute especially.It also allows to be limited in the pressure in jack itself and its sealing device, and therefore reduce described jack withstand voltage cross section and reduce its joint leak risk.For example, according to 20 roller mills of the present invention, the hydraulic jack in cross section is elongated by 7, under the pressure that 26.106 handkerchiefs (260 bar) is provided, apply 1400 tons of roll-forces, now with the conventional mill that is feature of the traditional jack with circular cross-section by the pressure of needs 130.106 handkerchief (1300 bar).
Preferably, the reach of bogie wheel according to the present invention is characterised in that especially, it comprises multiple first supporting areas being applied described local power by described actuator thereon, be called as power supporting area, local, and be used for supporting multiple second supporting areas of described bogie wheel, be called as wheel supporting area.Especially, described reach comprises described power supporting area and described alternating segments of taking turns supporting area.Especially, described wheel can rotate freely relative to roller bearing.Better, each wheel supporting area or each power supporting area can comprise a cross section, have less inertia than the supporting area cross section around it.
In addition, reach according to the present invention is characterised in that especially, each wheel supporting area can comprise for take turns the first surface and second surface that contact, described second surface is on the surface of reach outside direction projection, separates or be separated with first surface.Preferably, each wheel supporting area of described second embodiment comprises described second convex surfaces, and better, described second convex surfaces allows each rotating shaft of taking turns to tilt relative to wheel reach.
Especially, the feature of reach according to the present invention is, it comprises dismountable rotation chock, and each chock that rotates is installed in the otch of described reach, and be used for weakening the rigidity of described reach, each chock also allows wheel to rotate freely.Especially, the quantity of chock, and the quantity of therefore otch, equal the wheel quantity supported by described reach, each chock comprises and belongs to described and take turns supporting area and be used for taking turns with described the described first surface contacted, and be used for and the second surface of described incision contacts, such as, with a part of reach of chock complementation.Especially, described each chock is identical and have can by the shape intersected to form of vertical roller and described reach, and now roller is presented as a solid roll of horizontal location.Each otch of described reach allows described reach to bend, and, when described otch and described chock are installed each other, the cooperation between it, allow described take turns rotate freely.In addition, in order to alleviate the friction between described chock and described reach, especially, the feature of described reach is that it is in wheel supporting area and can comprise a lubricating oil with another surface described in described incision contacts and supply pipe network.Equally, described chock comprises at least one oil duct that can extend described oil supply pipe network especially, thus allows to lubricate the contact surface of chock-reach.
Preferably, method according to the present invention is characterised in that especially, before described rolling, at least receives another presetting initial order by least another actuator, and according to another presetting initial order location another actuator described described.Described presetting initial order and other presetting initial order each are separately for allowing the target cross section obtaining milling train exit band.Especially, described presetting initial order is a position command, and other presetting initial order described is a stress instruction.Better, described manipulation device is responsible for the described presetting initial order of transmission and other presetting initial order described especially.And, described manipulation device can associate with the presetting initial order of at least one adjacent actuators the presetting initial order of an actuator especially, described adjacent actuators such as applies described local power in a power supporting area, local, and power supporting area, described local and described actuator apply power supporting area, the local direct neighbor of described local power thereon.
Better, described manipulation device comprises the bar of at least one actuator or at least one position sensor of hydraulic jack piston especially, described position sensor is for being equipped in described actuator, and the measured value that described bar and described piston position change can be transmitted respectively by fore-and-aft motion before rolling or in the operation of rolling, and at least one hydrostatic sensor of described jack is for being equipped at least one actuator, and the pressure change of the hydraulic fluid supplying described jack can be measured and transmit this measured value to described manipulation device.Especially, each actuator can equip described position sensor and described pressure sensor.According to the described change measure of position and/or pressure, described manipulation device energy operated actuator, thus especially can keep constant described pressure or constant described position.Better, milling train according to the present invention and milling method according to the present invention are especially, particularly by the described hydrostatic sensor of each actuator to the measurement of roll-force, and in addition by the thickness measure that described thickness measure mechanism carries out in milling train exit, allow the control to rolling stand deflection and compensation separately.Therefore, the described manipulation device of milling train according to the present invention especially, particularly by the deflection of rolling stand described in described pressure or the real-time dynamic compensation of position sensor energy, and compensating the change of thickness of strip and section, described skew effect is the distortion that working roll gap does not wish to produce under roll-force change.
In the whole operating process of strip-rolling, especially, each actuator accepts the adjustment circulation of regulating command in real time, thus target cross section and the milling train outlet gap recorded between cross section are minimized.Preferably, at least two actuators of same row's bogie wheel of upper assembly obtain position control by described manipulation device, and receive described regulating command and presetting initial order.Better, the controlled actuator of described two positions is positioned at one end that described reach is not taken turns separately especially, and, in order to avoid the difference of too large local power, the two adjacent local power can handled by described manipulation device via described regulating command, are limited in having the difference of the local power being relatively less than 20%.
Accompanying drawing explanation
The exemplifying embodiment provided by the following drawings and embodiment will help to understand the present invention better.
Fig. 1 is according to 20 roller mill front elevation examples of prior art.
Fig. 2 is according to 20 roller mill profile examples of prior art.
Fig. 3 is according to 20 roller mill exemplifying embodiments (profile) of the present invention.
Fig. 4 is according to 20 roller mill exemplifying embodiments of first embodiment of the invention.
Fig. 5 is according to 20 roller mill exemplifying embodiments of second embodiment of the invention.
Fig. 6 is according to reach exemplifying embodiment of the present invention.
Fig. 7 is according to the present invention includes a reach exemplifying embodiment of taking turns.
Detailed description of the invention
For example, Fig. 1 illustrates the profile of the milling train according to prior art.With treat that the working roll 1 that strip contacts is supported by two backing rolls 2, backing roll itself is supported by three backing rolls 3, and backing roll itself is supported by four row's bogie wheels 4, and each row's bogie wheel is made up of the multiple bogie wheels be arranged on unique wheel reach 41.The centrifugation systems activated by tooth bar 62 ensures that each rotating shaft of taking turns 4 of same row is located relative to reach 41.
Fig. 2 illustrates the milling train front elevation according to prior art.Jack 7, by eccentric cam system, can arrange six ends of taking turns the reach 41 of 4 in support one and generate and apply roll-force.Seven actuators 6 can activate tooth bar 62, and tooth bar itself can ensure the location of each rotating shaft of taking turns 4 of same row relative to reach 41.Therefore multiple jack 7 is comprised according to the single unit system of prior art, its role is to generate on the reach 41 of a row six wheels 4 and apply roll-force, and independent of multiple actuator 6, as described actuator, it can ensure the location of each rotating shaft of taking turns 4 of same row relative to reach 41.
Fig. 3 illustrates the profile according to 20 roll shape multi-roll mills of the present invention, and this milling train is equipped in the cold-rolling equipment treating strip 9.Milling train according to the present invention especially comprises:
Assembly on – ten roll, be positioned at the cavity of the rolling stand 5 of described milling train, be in the top of the travel plane P of described band 9, and ten assembly (not shown) under roll, be positioned at another cavity of the rolling stand of described milling train, in the face of upper assembly, and be in the below of the travel plane P of described band 9, described upper and lower assembly is used for coordination with one another, thus band 9 is born can allow the roll-force that is rolled;
The each assembly of – comprises being used for and the working roll 1 treating that strip 9 contacts of being supported by two backing rolls 2, and backing roll itself is supported by three backing rolls 3, and backing roll itself is supported by four row's bogie wheels 4;
– respectively arranges bogie wheel 4 and comprises the multiple bogie wheels 4 be arranged on wheel reach 41;
At least one row's bogie wheel 4 of the upper assembly of –, on the direction of travel plane P being basically perpendicular to band 9, is activated by multiple bogie wheel actuator 42;
It is characterized in that:
Each actuator 42 of – bogie wheel, the direction of the travel plane P of band 9 is basically perpendicular to described in energy edge, on the reach 41 of a described skate, directly apply a local power, especially, each actuator such as comprises a hydraulic jack, jack comprises can the hollow body 421 of mobile piston 433 wherein, described piston is that one end of rod ends at supporting device 423, described supporting device is used for directly contacting with described reach 41, thus the power of described jack is transferred to described reach 41, or, the embodiment special according to another, described hollow body 421 directly can support the described supporting device 423 for directly contacting with described reach 41, and the described piston of described jack is drawn towards the opposite direction of described supporting device 423, be opposed to the fixed structure of rolling stand 5, thus allow by activating described jack, described reach 41 applies described local power,
– can apply the quantity of the bogie wheel actuator 42 of described local power on the reach 41 of same row's bogie wheel 4, at least equals the quantity of described same row's bogie wheel 4;
– it comprise manipulation device 8, can each actuator 42 described in individual operation especially, thus make the power sum that applied by each actuator 42 of milling train, equal thrust, described thrust equals described roll-force substantially.Therefore described manipulation device 8 can manipulate each actuator 42 independently, and such as generated the control signal activating described actuator by each actuator 42, described actuator can generate described local power and be used for being applied on described reach 41.Especially, described manipulation device 8 can from least one geometric shape measuring value of milling train exit band, generate described control signal, it is such as at least one the thickness measure mechanism 81 by least can carry out the described band of thickness measure to band described in milling train exit, and by can carry out the measured value of the described thickness of strip of at least one roughness measurement mechanism 82 acquisition of the described band of at least roughness measurement to band described in milling train exit, described each thickness and flatness measuring mechanism can transmit described thickness and flatness measured value respectively to manipulation device 8 especially.
Fig. 4 illustrates the 20 roller mill front views according to first embodiment of the invention.As shown in Figure 3, milling train comprises three backing rolls 3, and being used for supporting can the backing roll of support works roller, and row's bogie wheel 4 is installed on reach 41.For example, especially, every skate of described reach comprises six bogie wheels 4, and described milling train comprises seven actuators 42, separately at described reach, particularly by supporting device 423, for each actuator being used for applying described local power between two bogie wheels, apply substantially to equal the local power of 1/6 of roll-force (or more properly thrust), and for being used for applying each actuator of described local power near unique bogie wheel, such as laying respectively at reach one end and thus around two actuators of overall bogie wheel, apply substantially to equal the local power of 1/12 of roll-force (or more properly thrust).According to this first embodiment, each wheel 4 by two supporting devices 423 that belong to an actuator 42 respectively around.Therefore, according to this first embodiment, n+1 actuator 42 can apply described local power respectively on the reach comprising n wheel 4.Especially, each actuator can comprise the hydraulic jack 421 described supporting device 423 being pushed to described reach 41.In this case, actuator is particularly including hydraulic jack, and the movable piston 422 of equipment bar can move in jack, and is stopped by described supporting device 423 on the direction of described reach 41.Especially, thrust is absorbed by the structure of rolling stand 5.Therefore each hydraulic jack on the reach 41 of a skate 4, can generate via the described supporting device 423 contacted with described reach 41 and apply the component of roll-force.Especially, manipulation device 8 can make described roll-force be distributed on the different actuator of milling train 42, thus ensures the controlling functions to cross section.Especially, the distribution of described roll-force on each actuator or segmentation can be realized by the hydraulic coupling controlling and manipulate fluid by described control device 8, and described fluid is used for being distributed in each hydraulic jack via described fluid distribution network, thus activates each jack.Therefore the thickness allowing conditioning strip material on the one hand being controlled to this independent of described jack, correcting convexity and the distortion of working roll on the other hand by acting on described reach.
Fig. 5 illustrates the 20 roller mill front elevations according to second embodiment of the invention.Equal the milling train described by Fig. 4 according to the milling train of this second embodiment of the present invention, unique difference is that it comprises the actuator quantity 42 equaling wheel 4 quantity.For example, reach 41 comprises especially, and every skate has six bogie wheels 4, and milling train comprises six actuators 42, is used for respectively on described reach, applies particularly by one end 423 the local power substantially equaling 1/6 roll-force.According to this second embodiment, each wheel 4 by the supporting device 423 that belongs to unique actuator 42 respectively around.Therefore, according to this second embodiment, n actuator 42 can on the reach comprising n wheel 4, especially on described reach 41 by its supporting device 423 around wheel both sides, apply described local power respectively.Especially, each actuator 42 on described reach 41, such as, by using the hydraulic drive power provided by described hydraulic jack, can promote its supporting device 423 directly to described reach 41, thus applies described local power.Especially, propulsive force is applied in respectively takes turns both sides, and described propulsive force is absorbed by the structure of rolling stand 5.According to the milling train of described second embodiment, therefore often can arrange n wheel and comprise n jack, the effect of each jack is generated on the reach 41 of each skate 4 by described supporting device 423 and apply the component of roll-force, thus make described roll-force component sum, such as described local power sum equals described roll-force substantially.As described in Figure 4, manipulation device 8, particularly by controlling the supercharging of each jack and distributing hydraulic fluid, can manage the distribution of described roll-force on different actuator 42 and segmentation, thus the described controlling functions of guarantee to cross section.
Fig. 6 illustrates the exemplifying embodiment according to reach 41 of the present invention, and this reach is used in particular for cooperating with described actuator, thus allows conditioning strip material thickness on the one hand, effectively corrects work roll crown and distortion on the other hand.Described reach 41 comprises multiple first supporting area especially, be called as power supporting area 413, local, these power supporting areas, local are separately for the described supporting device 423 of at least localized contact actuator according to the present invention, and multiple second supporting area, be called as wheel supporting area 414, described supporting area of taking turns is for supporting and guiding described wheel.
Especially, each take turns supporting area 414 comprise for take turns the first surface 414a and second surface 414b that contact, described second surface 414b is convex surfaces, separate with described first surface or be separated, and when described reach 41 bends, allow described wheel to rotate freely around its rotating shaft is unconstrained.In addition, described reach 41, particularly including detachable chock 411, is also referred to as rotation chock, and each chock can be installed in the otch 412 of the described reach mated with it.Especially, each otch is for weakening the longitudinal rigid of described reach 41, and each chock has the geometry with the geometry complementation of described otch.Especially, the complementarity of described otch 412 and described chock 411, when described chock is installed in described otch 412, allows to take turns each wheel that supporting area 414 contacts rotate freely with described.
Preferably, the quantity of otch 412 and chock 411 equals the quantity of the wheel supported by described reach 41, each chock 411 comprises and belongs to described and take turns supporting area 414 and be used for taking turns with described the described first surface 414a contacted, and another surface being used for contacting with the described otch 412 of described reach 41, such as, with a part of reach of described chock 411 complementation.Preferably, the feature of each chock 411 of described reach 41 is, its shape is intersected to form by two rollers, and the axle of described roller is positioned at two vertical planes.
Especially, described reach 41 also comprise lubricating oil supply pipe network 415, its can wheel supporting area 414 on and can with the surface of the otch 412 of another surface contact described in described chock 411 on transport lubricating fluid.Better, described pipe network 415 especially allows the interior conduit via each reach 41, transports described lubricating fluid along described whole reach, and such as until described reach 41 does not belong to the surface of the surface contact of described reach 41 with other.Better, chock 411 and reach 41 are particularly including allowing the pipeline described pipe network 415 being extended to lubrication groove, and described lubrication groove at described first surface 414a, and can distribute described lubricating fluid in the bearing of one or more bogie wheel 4 of supporting.
Fig. 7 illustrates the exemplifying embodiment according to reach of the present invention, for example, it comprises and is arranged on described wheel 4 of taking turns on supporting area 414, preferably, this is taken turns and comprises convex outer surface (the described second surface 414b such as shown in Fig. 6), thus make convex outer surface comprise release groove with each intersection of power supporting area, local, when described reach 41 free bend, the guarantee of this release groove is described takes turns supporting area 414 and described free space of taking turns the Contact of 4.The such as feature of described convex outer surface is that radian has and allows described large radius of taking turns 4 rotations, such as, equal 2000mm.Equally, the described chock 411 from strip-rolling wheel stress can be absorbed especially, equally also can rotate against the reach otch 412 with its complementation.
In a word, compared with existing milling train and milling method, there is multiple advantage according to milling train of the present invention and milling method, and:
Its permission of – reduces the mechanical complexity of milling train, on the one hand by using identical actuator to generate and/or applying roll-force and Crown control, allow on the other hand to use hydraulic jack, replace very complicated with tooth bar, with eccentric cam, or with the crown control device of voussoir;
– which ensure that few reaction time, allow to carry out true in real time manipulation by manipulation device, the band geometry that described manipulation device can record in milling train exit according at least one roughness measurement mechanism and at least one the thickness measure mechanism by band, controls actuator;
– is especially in the use of monolithic devices rolling stand, and it allows, even before being measured by thickness and flatness measuring mechanism, to compensate and the thickness of strip of rolling stand skew correlation and the change of section, and thus bring the thickness of strip and flatness that more close specification;
– is especially in the use of " separately housing " type rolling stand, described " separately housing " type rolling stand may be able to make the relative position of the two halves rolling stand of separately housing type rolling stand described in formation change with the operation of rolling, it also allows even before being measured by roughness measurement mechanism, compensate the change with the band section of rolling stand skew correlation, and thus bring the strip flatness of more closing specification;
– is by allowing compensating deflection, it also allows, even when there is not thickness and/or roughness measurement value, according on described actuator according to the stress that rule or default list record, position or power are corrected, thus improves by the geometry of strip;
– allows it to control the assignment profile of roll-force on different wheels;
– allows it to enter assembly better when keeping in repair described assembly, and the roller of diameter in a big way can be used, reason is the vertical motion capabilities of roll assembly relative to lower roll assembly, only be limited to the jack stroke of such as taking turns actuator, and the opening that described stroke allows the aperture efficiency of the upper and lower assembly device with tooth bar or the centrifugal manipulation of voussoir well known by persons skilled in the art to allow is much bigger.