CN1636644A - Rolling mill, and device for eliminating loose for roll bearing box - Google Patents
Rolling mill, and device for eliminating loose for roll bearing box Download PDFInfo
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- CN1636644A CN1636644A CN 200410100799 CN200410100799A CN1636644A CN 1636644 A CN1636644 A CN 1636644A CN 200410100799 CN200410100799 CN 200410100799 CN 200410100799 A CN200410100799 A CN 200410100799A CN 1636644 A CN1636644 A CN 1636644A
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Abstract
The present invention relates to one kind one looseness eliminator for rolling mill and roller bearing box and relevant rolling process, rolling mill reforming method and serial hot finish rolling apparatus. The roller bearing box set inside the frame to support the rotary work roller is provided with one first pushing unit to apply the work roller with vertical balance force or bending force and one second pushing unit to apply the roller bearing box with horizontal force in the direction perpendicular to the work roller. The present invention features that the two pushing units are stagger configured in the axial direction of the work roller, or the second pushing unit is configured on the first pushing unit. In this way, the present invention can eliminate looseness of roller bearing box without increasing the size of the rolling mill.
Description
The application's application number that to be the applicant propose on April 25th, 2002 is dividing an application of 00814829.5 application.
Technical field
The present invention relates to device for eliminating loose, milling method, method of modifying rolling mill, and tandem (tandem) the hot finishing equipment of a kind of milling train, roll bearing box.
Background technology
In milling train, carry out easily in order to make roll change operation, between roll bearing box and frame or bearing, the gap is set, the skimming wear when this gap is changed because of roll etc. increases gradually.This gap horizontal direction along roll bearing box in the operation of rolling produces loosening.
In Japanese kokai publication hei 8-108202 communique, recorded and narrated a kind of method, this method is being arranged on cylinder that working roll axis height place pushes the workroll bearing case and the cylinder that frame side is pushed with central roll bearing housing all-in-one-piece supporting member, eliminate the gap of the horizontal direction of each bearing housing, make the position stabilityization of working roll.Yet, reckon without also usefulness with crooked cylinder.
In Japanese kokai publication sho 61-129208 communique, put down in writing crooked cylinder and the loosening technology of eliminating cylinder of being provided with.Yet, reckon without the miniaturization, crooking ability of equipment, loosening elimination ability.
The objective of the invention is to eliminate roll bearing box loosening of milling train and do not make equipment enlarging.
Disclosure of an invention
The present invention be provided with the roll bearing box that in frame, supports working roll pivotally, by this roll bearing box to this working roll apply the equilibrant force of above-below direction or bending force the 1st pressing device, and this roll bearing box is applied in the horizontal plane the 2nd pressing device with the pushing force of the direction of work roll shaft orthogonal;
It is characterized in that: above-mentioned the 1st pressing device and above-mentioned the 2nd pressing device are in the working roll configuration of staggering on axially.
Perhaps, be characterised in that: on working roll is axial, between above-mentioned a plurality of the 1st pressing devices, dispose above-mentioned the 2nd pressing device.
The simple declaration of accompanying drawing
Fig. 1 is the milling train plane of one embodiment of the invention.
Fig. 2 is the front elevation of the milling train of one embodiment of the invention.
Fig. 3 is the A portion details drawing of Fig. 1.
Fig. 4 is the B portion details drawing of Fig. 2.
Fig. 5 is that the offset level that acts on each roll when rolling is divided the force direction key diagram.
Fig. 6 is the resistance key diagram of the loosening elimination cylinder of relative rolling load.
Fig. 7 illustrates the tandem equipment of hot rolling of using one embodiment of the invention.
Fig. 8 illustrates the high pressure and the low pressure switching hydraulic circuit of one embodiment of the invention.
Fig. 9 is the partial plan of the milling train of one embodiment of the invention.
Figure 10 is the partial front figure of the milling train of one embodiment of the invention.
Figure 11 is the partial plan layout of the milling train of one embodiment of the invention.
Figure 12 is the partial front figure of the milling train of one embodiment of the invention.
The optimised form that carries out an invention
(embodiment 1)
Fig. 1 is the plane that the milling train of having used one embodiment of the invention is shown.
Fig. 2 is the front elevation that the milling train of having used one embodiment of the invention is shown.
The milling train that illustrates in the present embodiment is 4 roller mills, has a pair of working roll 3 up and down that rolled piece 1 is rolled and a pair of backing roll 5 up and down that respectively a pair of working roll 3 about this is supported in frame 2.But also can be applicable to as 6 roller mills, between working roll 3 and backing roll 5, dispose the milling train of intermediate calender rolls 4.
Connect roll at an end of working roll 3 and drive, drive with axle 12 by this roll rotary driving force is delivered to working roll 3, working roll 3 is turned round with axle 12.
A pair of up and down working roll 3 is supported with bearing housing 7 by working roll pivotally by bearing 6 respectively, and a pair of up and down backing roll 5 is supported with bearing housing 8 pivotally by backing roll respectively.
At present embodiment, have 2 kinds of pressing devices.
The 1st kind of the crooked cylinder 13 of roll for working roll 3 being applied bending force, the position of working roll 3 being adjusted.That is, the 1st pressing device can apply the desired power of above-below direction by working roll at the two ends of working roll 3 with bearing housing 7.
The 2nd kind for being the 2nd pressing device of purpose to eliminate loosening, the promptly loosening cylinder of eliminating.The 2nd pressing device can be to working roll with bearing housing 7 with apply the power of horizontal direction with 7 pairs of working rolls 3 of bearing housing by working roll.That is, can apply desired power to working roll 3 grades in the direction of relative roll mandrel direction orthogonal.
Here, the 1st pressing device is that the crooked cylinder 13 of roll is configured in frame 2, the fixing bearing 12 and the working roll that maybe can be disposed at frame 2 used between the bearing housing 7 with being free to slide.In order to improve finished form and thickness of slab precision, be preferably fluid pressure type cylinder large-scale, high-output power.The crooked cylinder 13 of roll be arranged at respect to 1 roll these roll two ends 2 positions send into side and outlet side.Be that relative 1 roll is arranged at 4 positions.The crooked cylinder 13 of a plurality of rolls also can be set at 1 position.In the present embodiment, along the roll mandrel direction the crooked cylinder 13 of 2 rolls is set.
The direction of the power of the crooked cylinder 13 of this roll is an above-below direction, acts on working roll 3 by working roll with the member of bearing housing 7.For this reason, load acts on the bearing 6 that is located in the working roll usefulness bearing housing 7.In order to make this bearing 6 long lifetimes, 6 operations are not provided with the crooked cylinder 13 of roll partially with loading to bearing, preferably make load act on the middle heart setting of bearing 6.
That is it is the most effective, in the crossing position of the sliding axle of sliding axle that becomes flexible elimination cylinder piston 18 and the crooked cylinder piston 14 of roll loosening elimination cylinder to be set.But when becoming flexible when eliminating the position that sliding axle that cylinder is set to its piston sliding axle and the crooked cylinder piston 14 of roll intersects, the crooked cylinder 13 of roll is elongated with the distance of the stiff end of the member of the roll bearing box of accepting its output, and bending moment becomes greatly.Like this, the member of roll bearing box of accepting the output of the crooked cylinder 13 of roll maximizes, and needs high intensity, causes milling train to maximize.
Fig. 4 is the partial enlarged drawing of Fig. 1.(F: the crooked cylinder output of roll, L: distance), in order to reduce bending moment M, bending moment M need reduce the distance L or reduce power F by M=FL.
As described above, because the output F of the crooked cylinder 13 of roll needs to increase, so, in order to reduce bending moment M, preferably shorten the distance L of the crooked cylinder 13 of roll and the stiff end of the member of the bearing housing of accepting its output.
In addition, loosening when eliminating cylinder when using because along continuous straight runs pushing roll bearing box, so, when rolling at roll bearing box and frame 2 or 12 generations of bearing frictional resistance.The relative rolling load of this frictional resistance acts in the opposite direction, so, become the interference of the load sensor of measuring rolling load, may produce harmful effect to production board shape and thickness of slab precision.(K: become flexible and eliminate cylinder output, μ: represent that coefficient of friction) output of loosening elimination cylinder is big more, then the interference that load sensor is produced is also big more by Q=K μ for this frictional resistance Q.
In addition, as shown in Figure 3, the direct of travel (rolling direction) that working roll can remain on relative rolled piece 1 with bearing housing 7 with being free to slide is located at and is sent into sending into side bearing 12a and being arranged between the outlet side bearing 12b of outlet side of side.There is clearance G at working roll with bearing housing 7 and frame 2 or 12 of bearings, becomes when carrying out the replacing of working roll 3 and working roll 3 is extracted working roll from milling train with bearing housing 7 structure with being integral.
In Fig. 1, send into side bearing 12a and outlet side bearing 12b is fixed in frame 2, can be but also can be towards the bearing in axial sliding 12 of working roll 3.Send into side bearing 12a and outlet side bearing 12b can fix or be connected to slidably frame 2.Be provided with by working roll and apply the crooked cylinder 13 of roll of bending force sending into side bearing 12a and outlet side bearing 12b, the loosening cylinder 15 of eliminating is set, send into side direction pushing working roll bearing housing 7 towards frame 2 at outlet side bearing 12b with 7 pairs of working rolls 3 of bearing housing.
In Fig. 3 and Fig. 4, the loosening sliding axle OF that eliminates sliding axle OK that cylinder 15 do not make its piston 18 and roll bending cylinder piston 14 setting of staggering crossingly.By such formation, equipment does not all maximize and crooked cylinder 13 of roll and the loosening cylinder 15 of eliminating can be formed large-scale cylinder respectively.That is, become the equipment of the horizontal direction position stability that when the shape of not damaging rolled piece 1 is controlled, makes working roller bearing case 7.That is,, do not make equipment enlarging can eliminate roll bearing box loosening of milling train by configuration above-mentioned the 1st pressing device and above-mentioned the 2nd pressing device of axially staggering at working roll.
In addition, by be provided with a plurality of for example 2 via roll bearing box this working roll is applied the equilibrant force of above-below direction or the 1st pressing device of bending force, between working roll these 2 the 1st pressing devices on axially, be provided with this roll bearing box is applied in the horizontal plane the 2nd pressing device with the pushing force of the direction of work roll shaft orthogonal, can eliminate roll bearing box loosening of milling train, and do not make equipment enlarging, do not reduce the fan-out capability of equilibrant force or bending force.
Because the both sides of the 2nd pressing device that makes progress at roll mandrel dispose the 1st pressing device, so, can eliminate roll bearing box loosening of milling train, and not make equipment enlarging, do not reduce the fan-out capability of equilibrant force or bending force.
Prop up pivotally by roll bearing box and to honour the working roll that rolled piece 1 is rolled, this working roll is applied the equilibrant force or the bending force of above-below direction by this roll bearing box, the different position, the position with applying this equilibrant force or bending force that roll mandrel in horizontal plane makes progress, apply and the pushing force of the direction of the roll shaft orthogonal of working is rolled to this roll bearing box, thereby can not make equipment enlarging, not reduce under the state of fan-out capability of equilibrant force or bending force, becoming flexible of the roll bearing box of elimination milling train makes stable rolling become possibility.In addition, prop up pivotally by roll bearing box and to honour the roll that rolled piece 1 is rolled, by this roll bearing box this working roll is applied the equilibrant force or the bending force of above-below direction from a plurality of positions that roll mandrel makes progress, the pushing force that this roll bearing box is applied in the horizontal plane with the direction of work roll shaft orthogonal from the position between a plurality of positions that apply this equilibrant force or bending force is rolled, thereby makes stable rolling become possibility.
According to present embodiment, by with pressing device towards horizontal direction pushing milling train roll bearing box, the output ground that can not damage the crooked cylinder 13 of roll balance cylinder or roll is provided with the loosening elimination cylinder that height is exported.
In addition, by 1 roll being provided with the piston glide direction of the loosening elimination cylinder more than 2 in the direction vertical with the piston glide direction of roll balance cylinder or the crooked cylinder 13 of roll, and will become flexible and eliminate cylinder and be set to the position that the piston sliding axle that do not make the loosening piston sliding axle of eliminating cylinder and roll balance cylinder or the crooked cylinder 13 of roll staggers crossingly, the shape control ability that can maximally utilise roll bending cylinder 13 can be provided and can suppress towards the device for eliminating loose of the mobile roll bearing box of the horizontal direction of roll bearing box.
In addition, in the occasion that existing device is transformed,,, has the advantage that can reduce cost significantly so when this device for eliminating loose was set, The reconstruction scope can be very little owing to roll balance cylinder, the crooked cylinder 13 of roll, bearing housing etc. can use existing parts.
Promptly, the 1st pressing device applies the equilibrant force or the bending force of above-below direction to this working roll by the roll bearing box that supports working roll in frame 2 pivotally, be provided with in the position that the working roll axial location with the 1st pressing device staggers this roll bearing box is applied in the horizontal plane the 2nd pressing device with the pushing force of the direction of work roll shaft orthogonal, thereby can easily transform operation, the ability ground that can not damage equilibrant force or bending adds the loosening transformation of eliminating mechanism.
In addition, occasion at 4 roller mills and 6 roller mills etc., for example, even the loosening cylinder of eliminating is set so that the working roll position stability in order to be used for the workroll bearing case, also owing to the unstable unsettled occasion in working roll position that exists in the position of other roll that supports working roll 3, so, the workroll bearing case is set with the loosening stable loosening elimination cylinder of roll location of eliminating cylinder and making supporting working roll 3 by combination, can carry out more stable rolling.
(embodiment 2)
Below, the occasion that makes working roll 3 skews is described.
When nipping rolled piece 1, working roll 3 produces excessive horizontal force towards sending into side, and the backing roll of supporting working roll 3 is accepted its counter-force and produced horizontal force towards outlet side.This backing roll is a backing roll 5 in the occasion of 4 roller mills, is intermediate calender rolls 4 in the occasion of 6 roller mills.
When stable rolling, the offset level component generation direction of working roll 3 as shown in Figure 5, the roll of supporting working rolls 3 is towards sending into the occasion that lateral deviation is moved relatively at working roll 3, the horizontal force that produces at working roll 3 becomes sends into side direction.Roll at supporting working roll 3 is that the horizontal force that intermediate calender rolls 4 produces is the outlet side direction.
Like this, the direction of the horizontal force that each roll in the operation of rolling produces is different and different according to as-rolled condition and offset direction, so, very important by the direction of loosening elimination cylinder pushing roll bearing box.
In addition, even for example eliminate cylinder and be set to the occasion that working roll 3 pushes with bearing housing 7 working roll towards horizontal direction will becoming flexible, because the roll of supporting working roll 3 is not subjected to mechanical constraint in the horizontal direction, so, the horizontal direction position instability that becomes.In addition, also there be direction and the big or small problem of unstable that results from the offset level component of working roll 3 by the roll of supporting working roll 3.
As shown in Figure 2, rolling load is applied to backing roll bearing housing 8 by depressing jack 9, and is applied to working roll 3 by backing roll 5, and rolled piece 1 is rolled.Rolling load is measured by depressing with load sensor 10.
The send into side direction of the axes O W of working roll 3 from the axes O B of backing roll 5 towards rolled piece 1 only is offset δ.
In the occasion that the roll of Fig. 2 constitutes, the offset level component that acts on working roll 3 is the side direction of sending into of rolled piece 1, so, the loosening cylinder 15 of eliminating of working roll is set to outlet side bearing 12b, working roll is pressed to bearing housing 7 sends into side bearing 12a.The offset level component that acts on backing roll 5 becomes the outlet side direction of rolled piece 1 owing to the counter-force of the offset level component of accepting working roll 3, so, the loosening cylinder 17 of eliminating of backing roll is set to the send into side direction of backing roll with bearing housing 8, with outlet side direction pushing backing roll bearing housing 8 towards frame 2.
Though the loosening cylinder 17 of eliminating of backing roll is arranged on backing roll with bearing housing 8, also can be the sending into side direction the loosening cylinder 17 of eliminating of backing roll is set of frame 2, with backing roll with the outlet side direction pushing of bearing housing 8 towards frame 2.
By loosening cylinder 15 and the loosening cylinder 17 of eliminating of backing roll eliminated of working roll is set, each roll bearing box effect (offset level component)+(the loosening power of eliminating cylinder output) that can be in the operation of rolling, the horizontal direction that suppresses the roll bearing box in the operation of rolling moves.
For example, in Fig. 2, by by the loosening cylinder 15 pushing frames 2 of eliminating of working roll, sandwich working roll with bearing housing 7, suppress working roll moving with the horizontal direction of bearing housing 7 by sending into side bearing 12a and outlet side bearing 12b.
Fig. 5 is illustrated in the example that 6 roller mills are provided with loosening elimination cylinder of the present invention.In this figure, the axis that makes the relative intermediate calender rolls 4 of axis of working roll 3 and backing roll 5 only is offset δ towards the side direction of sending into of rolled piece 1.When making working roll 3 when sending into the side direction skew and apply rolling load P, at working roll 3 towards sending into side direction effect offset level component HW, intermediate calender rolls 4 as the counter-force of HW towards with the HW rightabout be outlet side directive effect offset level component HI.In addition, promptly send into side direction effect offset level component HB as the counter-force of HI towards the direction opposite at backing roll 5 with HI.
The loosening elimination of working roll cylinder 15, the loosening elimination of intermediate calender rolls cylinder 16 are set with pushing each roll bearing box, reach the loosening elimination of backing roll cylinder 17 in the offset level component generation direction that acts on each roll, the horizontal direction that can suppress each roll bearing box in the operation of rolling moves.In Fig. 5, the axis of intermediate calender rolls 4 and backing roll 5 is not offset, so the offset level component HB that acts on backing roll 5 is very little, therefore, in this occasion, can be outlet side pushing intermediate calender rolls 4 and backing roll 5 in the same direction yet.That is, also can be by the loosening cylinder 17 of eliminating of backing roll towards outlet side pushing back-up roll bearing case.
In addition, in the milling train of the 1st roll bearing box with working roll and the 2nd roll bearing box of the backing roll of this working roll of supporting, be provided with and in horizontal plane, be applied to the pressing device of the 1st roll bearing box at the milling train outlet side with the pushing force of the direction of work roll shaft orthogonal, send into side at milling train and be provided with and in horizontal plane, be applied to the pressing device of the 2nd roll bearing box, thereby can realize the stabilisation of roll horizontal direction with the pushing force of the direction of work roll shaft orthogonal.This can obtain significant especially effect in the occasion that makes the working roll skew.
In addition, because the difference according to the type of milling train makes the roll that produces horizontal force different with direction, so, the occasion that loosening elimination cylinder of the present invention need be set at all rolls is also arranged, for example, the loosening cylinder 15 of eliminating of working roll also can only be set, or combination is provided with loosening cylinder 15 and the loosening cylinder 17 of eliminating of backing roll eliminated of working roll.
In Fig. 6, as an example, the schematic diagram of the resistance Q of the relative rolling load P of loosening elimination cylinder that the loosening occasion of eliminating cylinder 15 of working roll is set is shown.In this figure, rolling load P and the loosening relation of eliminating the frictional resistance Q of cylinder are shown, so omitted the power of other effect.Because working roll 3 relative intermediate calender rolls 4 and backing roll 5 move towards sending into lateral deviation, so, the loosening cylinder 15 of eliminating of working roll is arranged at outlet side, press the workroll bearing case towards sending into thruster.When sending into side direction pushing workroll bearing case by the loosening elimination of working roll cylinder 15 with power output K court, the workroll bearing case is accepted counter-force K from frame 2 or the bearing 12 of sending into side.
When applying rolling load P under the state that to make the loosening power output of eliminating cylinder 15 of working roll be K, send into side and send into the frame 2 of side or the contact-making surface effect and the rightabout frictional resistance Q of rolling load P of bearing 12 with the contact-making surface and the workroll bearing case of workroll bearing case at the loosening cylinder 15 of eliminating of working roll.(μ: represent that coefficient of friction) relative 1 workroll bearing case has 2 contact-making surfaces, relative 1 working roll 3 has 2 workroll bearing casees to this frictional resistance Q by Q=K μ, in addition, working roll 3 has 2 up and down, so, in the occasion of this figure, the mask that frictional resistance produces has 8.Therefore, the total ∑ Q=8Q=8K μ of frictional resistance Q becomes flexible the resistance of the size increase of the power output K that eliminates cylinder 15 to rolling load P according to working roll.
As described above, when frictional resistance Q becomes big, interference to the load sensor of measuring rolling load P becomes big, the problem that exists production board shape and thickness of slab precision to worsen, so, when the horizontal direction position of carrying out working roll 3 is in the stable rolling of more stable state, preferably reduce the loosening power output K that eliminates cylinder 15 of working roll, reduce depressing interference with load sensor.
By making by the identical direction of action direction of the loosening direction of eliminating cylinder pushing roll bearing box for the offset level component that is subjected to roll, the masterpiece of feasible (offset level component)+(the loosening cylinder power output of eliminating) is that horizontal force action is in roll bearing box, so, can carry out stable rolling.
The horizontal force that the offset level component of the roll that acts on working roll 3 and working roll 3 is supported forms becomes rightabout according to action and reaction, so the loosening press direction of eliminating cylinder breaker roll bearing housing becomes opposite.
When nipping plate, even in the occasion of the horizontal force that results from roll for the direction opposite with offset level component, stagger with the loosening piston sliding axle of eliminating cylinder by the piston sliding axle that makes the crooked cylinder 13 of above-mentioned roll balance cylinder or roll, the loosening elimination cylinder of high power output can be set, so, can make by the loosening press direction of eliminating the bearing housing of cylinder generation is the direction identical with the direction of offset level component, thereby the bigger horizontal force of horizontal force that can produce when nipping in the roll bearing box effect can make the horizontal level stabilisation of roll.
In addition, make working roll towards in horizontal plane with the direction skew of work roll shaft orthogonal, the 2nd pressing device divides force direction pushing roll bearing box towards the offset level of this working roll, can obtain pushing force by (offset level component)+(the loosening cylinder power output of eliminating) produces, so, efficient is very good, the elimination that can become flexible.
In addition, by change the loosening output of eliminating cylinder according to rolling situation, in the time of can be with stable rolling to the interference reduction of depressing load sensor 10 to Min., can produce the good rolled piece 1 of plate shape and thickness of slab precision, the rolled piece 1 when rolling crawl and problem such as necking down also can reduce.
In addition, even the occasion that the horizontal force that produces when nipping is big, roll bearing box moves towards the direction opposite with the action direction of offset level component also can make the position of roll bearing box turn back to the action direction of offset level component and stabilisation after just nipping by (offset level component)+(the loosening cylinder power output of eliminating).
Yet, as also using the loosening elimination cylinder of high power output when the stable rolling, then exist as described above the interference of depressing with load sensor is become big problem, but because the position of the roll during stable rolling is more stable, so the loosening power output of eliminating cylinder can be lower.Therefore, by using the loosening cylinder of eliminating in the occasion of the excessive horizontal force of roll effect under by high power output when nipping plate etc., the horizontal level of roll is than under the stable status when stable rolling etc., uses by low power output and looseningly eliminates cylinder, thereby can address this problem.
As these means, having the loop that makes to loosening elimination cylinder is supplied with hydraulic pressure is the method for high-low pressure switching circuit.In addition, when stable rolling, make the sufficiently stable occasion of roll location, can be only use the loosening cylinder of eliminating in the occasion of the big horizontal force of roll effect when plate is nipped etc., when stable rolling, do not act on by offset level component.
Fig. 8 illustrates the example of hydraulic pressure supply to the hydraulic circuit of the loosening elimination cylinder of present embodiment.With hydraulic pressure supply to this loosening hydraulic circuit of eliminating cylinder by with the supply circuit of the crooked cylinder 13 of roll outside system's setting.For this reason, can distinguish independent control.This loop have as the magnetic valve 19 of the opening and closing device that become flexible setting (connections) of eliminating cylinder and reset (cut-out), conduct carry out high pressure and low pressure switching switching device shifter magnetic valve 20, reach pressure-reducing valve 21, safety valve 22, flow rate regulating valve 23 that pressure is provided with usefulness.C portion among Fig. 8 is the loop that is used for high pressure and low pressure switching.
Be in the occasion of setting side at magnetic valve 19, the loosening head side 15a that eliminates cylinder 15 supplies with hydraulic pressure to working roll, can make the loosening cylinder 15 of eliminating of working roll become user mode.In addition, make magnetic valve 19 be in the occasion of the reset side opposite with this figure, to the loosening bar side 15b that eliminates cylinder 15 of working roll, the loosening cylinder 15 of eliminating shrinks with hydraulic pressure supply, makes the loosening cylinder of eliminating become obsolete state.Below, the low pressure when the loosening elimination of use cylinder 15 is described and the setting of high pressure.
Fig. 8 illustrates the loosening state that cylinder is under low pressure set of eliminating.Low pressure is set and at first magnetic valve 20 is set to low pressure, and the safety valve 22a in the loop of C portion is set to low pressure pL side, and the hydraulic pressure in the loop of C portion is made as pL.Pressure by C portion makes the setting pressure of the safety valve 22b of change safe pressure also be low pressure pL, and supplying to the loosening hydraulic pressure of eliminating cylinder 15 of working roll becomes low pressure pL, the output when loosening elimination cylinder becomes low pressure.
In addition, in the occasion that magnetic valve 20 is set at the high pressure opposite, because not by safety valve 22a, so the hydraulic pressure in the loop of C portion becomes high pressure pL with this figure.Because the setting pressure of safety valve 22b also becomes high pressure pH, so supplying to the loosening hydraulic pressure of eliminating cylinder 15 of working roll becomes high pressure pH, the output when the loosening elimination of working roll cylinder 15 becomes high pressure.
According to such formation, can change the loosening output of eliminating cylinder 15 of working roll.
As described above, because making the variable switching device shifter of this pushing force and make this pushing force in the 2nd pressing device setting is in 0 the switching device shifter at least 1, so, can solve the interference that produces when the loosening elimination cylinder that height is exported is used for stable rolling and become big problem depressing with load sensor.
(embodiment 3)
Below, the form of utilizing of using milling train of the present invention is described.
Configuration milling train in hot finishing tandem rolling equipment tandem ground little by little is rolled into thin plate.In this equipment, the rolling thick more plate of past more leading portion, the rolling thin more plate of past more back segment.For this reason, past more back segment rolled piece 1 nips with rolling difficult more.In addition, because past more back segment is big more to the quality influence of finished product, so for production board shape and thickness of slab precision, the stabilisation of its roll location when rolling of the milling train of past more back segment is important more.
Fig. 7 is illustrated in the example that hot finishing tandem rolling equipment is provided with loosening elimination cylinder of the present invention.The rolling equipment of Fig. 7 is the tandem rolling equipment of 7 supports (std), and the 1-3 support is 4 roller supports, and the 4-7 support is 6 roller supports.
In the present embodiment, in the 4-7 frame suitable loosening elimination cylinder of the present invention is set with back segment.Though all rolls in the 4-7 frame are provided with the loosening cylinder of eliminating, also can only be provided with, or be provided with other roll combination at working roll 3.
The back segment that is set to hot finishing tandem rolling equipment by the loosening elimination cylinder 4-7 support of the occasion of 7 support tandem rolling equipments for example particularly with present embodiment, can stably be rolled, improve that production board shape and thickness of slab precision are good, rolled piece 1 crawls and the few equipment of problem such as necking down thin plate.
Like this, carry out in the hot finishing tandem rolling equipment of hot finishing at a plurality of milling trains of tandem ground configuration, milling train at the back segment of this hot finishing tandem rolling equipment is arranged on the roll bearing box that supports working roll in the frame (housing) 2 pivotally, by this roll bearing box this working roll is applied the equilibrant force of above-below direction or the 1st pressing device of bending force, be applied in the horizontal plane the 2nd pressing device with the pushing force of the direction of working roll orthogonal to this roll bearing box, on the working roll direction, stagger and dispose above-mentioned the 1st pressing device and above-mentioned the 2nd pressing device, particularly can realize rolling stabilisation.
(embodiment 4)
Below, the example that disposes a plurality of the 1st pressing devices and the 2nd pressing device is described.
At first explanation is provided with the occasion to the both sides of the crooked cylinder 13b of minimizing of the bending force of crooked cylinder 13a of the increase of the bending force of the recessed direction of working roll effect and effect convex direction.Fig. 9 and Figure 10 illustrate the partial plan layout and the part front elevation of the milling train of one embodiment of the invention, and the example that is provided with that increases crooked cylinder 13a and reduce crooked cylinder 13b is shown.
The output of these crooked cylinders is determined by roll strength.To increase bending force and reduce bending force in order to bring into play to greatest extent, preferably make the increase bending force each cylinder is set with becoming identical output with the minimizing bending force.For example, 2 occasions that increase crooked cylinder 13a and 1 crooked cylinder 13b of minimizing are being set in outlet side bearing 12b, establishing the diameter that reduces crooked cylinder 13b is that φ D, the diameter that increases crooked cylinder 13a are
Like this, identical by the area that makes effect hydraulic pressure, can make 2 increase crooked cylinders to make a concerted effort with 1 power that reduces crooked cylinder be identical output.
In this occasion, also can increase crooked cylinder 13a and reduce to be provided with between the crooked cylinder 13b to become flexible and eliminate cylinder.But, because outlet side bearing 12b need form the intensity that conforms to the crooked cylinder 13b of large diameter minimizing, so even crooked cylinder 13a of the increase of minor diameter and the loosening position consistency of eliminating cylinder 15 also need not make bearing maximize, equipment can not maximize.That is, eliminate the occasion that cylinder is set to the bearing of the crooked cylinder with different-diameter will becoming flexible, stagger, can keep suitable crooking ability and do not make equipment enlarging by the position and the loosening position of eliminating cylinder that make large diameter crooked cylinder.
Below, the loosening occasion of eliminating cylinder 15 of a plurality of working rolls of configuration is described.Figure 11 and Figure 12 illustrate the partial plan layout and the local front elevation of the milling train of one embodiment of the invention, and the occasion of a plurality of loosening elimination cylinders of configuration is shown.
Move in the milling train towards axially movable roll at working roll, the moving axially of working roll 3 makes workroll bearing case 7 also towards moving axially, so, the loosening cylinder 15 of eliminating of working roll occurs and throw off and can not be towards the occasion of horizontal direction pushing from roll bearing box 7.This problem can be solved by a plurality of loosening elimination cylinders 15 are set vertically.For example, in the present embodiment, the loosening elimination cylinder of above-below direction 2 row, roll mandrel direction 3 row is set.
As Figure 11 and shown in Figure 12, owing to working roll 3 moves towards the roll mandrel direction, so the loosening cylinder 15a that eliminates deviates from from roll bearing box 7.In the present embodiment, along the roll direction a plurality of loosening elimination cylinders 15 are set.Like this, even the axial change in location of the roll of working roll 3 makes loosening elimination cylinder 15a become the position of deviating from from roll bearing box 7, loosening cylinder 15b of elimination and 15c are in towards the position of horizontal direction pushing roll bearing box 7.For this reason, the moving of horizontal direction position that can suppress the working roll 3 in the operation of rolling.
In addition, by with the roll mandrel direction a plurality of loosening elimination cylinders 15 being set along the vertical direction, can push roll bearing box by high power output towards horizontal direction, better effects if.
But, working roll is moved in the milling train towards axially movable roll, be in when the loosening elimination cylinder 15a of the position that roll bearing box 7 is deviate from becomes user mode the problem that exists moving axially of working roll 3 to be hindered when making.In order to address this problem, preferably each cylinder is provided with above-mentioned hydraulic system shown in Figure 8, make each cylinder independent, thereby selectively make the loosening elimination cylinder 15b, the 15c that are in the position that can push roll bearing box 7 become user mode, make the loosening elimination cylinder 15a that is in the position that can not push roll bearing box 7 become not user mode, make the moving axially of roller 3 of can not hindering one's work.
The possibility of utilizing on the industry
For the device for eliminating loose of milling train, roll bearing box, milling method, method of modifying rolling mill, And hot finishing tandem rolling equipment, can eliminate roll bearing box loosening of milling train, realizes rolling surely Fixedization, and do not make equipment enlarging.
Claims (6)
1. milling train is characterized in that: be provided with the roll bearing box that in frame, supports working roll pivotally, by this roll bearing box to this working roll apply the equilibrant force of above-below direction or bending force the 1st pressing device, and this roll bearing box is applied in the horizontal plane the 2nd pressing device with the pushing force of the direction of work roll shaft orthogonal;
Above-mentioned the 1st pressing device and above-mentioned the 2nd pressing device are in the working roll configuration of staggering on axially;
Described the 2nd pressing device has makes described pushing force become variable switching device shifter.
2. milling train is characterized in that: be provided with the roll bearing box that in frame, supports working roll pivotally, by this roll bearing box to this working roll apply the equilibrant force of above-below direction or bending force a plurality of the 1st pressing devices, and this roll bearing box is applied in the horizontal plane the 2nd pressing device with the pushing force of the direction of work roll shaft orthogonal;
On working roll is axial, between above-mentioned a plurality of the 1st pressing devices, dispose above-mentioned the 2nd pressing device;
Described the 2nd pressing device has makes described pushing force become variable switching device shifter.
3. milling train according to claim 1 and 2 is characterized in that: it is 0 that described switching device shifter can make this pushing force.
4. milling train according to claim 1 and 2 is characterized in that: the device that the pushing force of described the 2nd pressing device of independent control is set.
5. the device for eliminating loose of a roll bearing box is characterized in that: be provided with the roll bearing box that in frame, supports working roll pivotally, by this roll bearing box to this working roll apply the equilibrant force of above-below direction or bending force the 1st pressing device, and this roll bearing box is applied in the horizontal plane the 2nd pressing device with the pushing force of the direction of work roll shaft orthogonal;
Above-mentioned the 1st pressing device and above-mentioned the 2nd pressing device are in the working roll configuration of staggering on axially;
Described the 2nd pressing device has makes described pushing force become variable switching device shifter.
6. the device for eliminating loose of a roll bearing box is characterized in that: be provided with the roll bearing box that in frame, supports working roll pivotally, by this roll bearing box to this working roll apply the equilibrant force of above-below direction or bending force a plurality of the 1st pressing devices, and this roll bearing box is applied in the horizontal plane the 2nd pressing device with the pushing force of the direction of work roll shaft orthogonal;
On working roll is axial, between above-mentioned a plurality of the 1st pressing devices, dispose above-mentioned the 2nd pressing device;
Described the 2nd pressing device has makes described pushing force become variable switching device shifter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101007998A CN100335189C (en) | 2000-03-01 | 2000-03-01 | Rolling mill, and device for eliminating loose for roll bearing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101007998A CN100335189C (en) | 2000-03-01 | 2000-03-01 | Rolling mill, and device for eliminating loose for roll bearing box |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB008148295A Division CN1213817C (en) | 2000-03-01 | 2000-03-01 | Rolling mill, looseness eliminating device of roll bearing housing, rolling method, method of modifying rolling mill, and hot finishing tandem rolling equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1636644A true CN1636644A (en) | 2005-07-13 |
| CN100335189C CN100335189C (en) | 2007-09-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004101007998A Expired - Lifetime CN100335189C (en) | 2000-03-01 | 2000-03-01 | Rolling mill, and device for eliminating loose for roll bearing box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100335189C (en) |
Cited By (7)
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| CN111250543A (en) * | 2018-11-30 | 2020-06-09 | 上海梅山钢铁股份有限公司 | Reversible mill clearance eliminating device |
| JP2020518460A (en) * | 2017-05-03 | 2020-06-25 | エス・エム・エス・グループ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Rolling stand for rolling metal materials |
| CN112243394A (en) * | 2018-05-29 | 2021-01-19 | 日本制铁株式会社 | Rolling mill and setting method of rolling mill |
| CN112705568A (en) * | 2019-10-25 | 2021-04-27 | 普锐特冶金技术日本有限公司 | Rolling mill |
| CN112705572A (en) * | 2019-10-25 | 2021-04-27 | 普锐特冶金技术日本有限公司 | Rolling mill and rolling method |
| CN113853256A (en) * | 2019-05-23 | 2021-12-28 | 钢铁普蓝特克股份有限公司 | Rolling mill, rolling method, and method for operating work roll |
| CN113950383A (en) * | 2019-10-25 | 2022-01-18 | 普锐特冶金技术日本有限公司 | Rolling mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60158904A (en) * | 1984-01-30 | 1985-08-20 | Hitachi Ltd | Rolling mill |
| JPS6431502A (en) * | 1987-07-28 | 1989-02-01 | Ishikawajima Harima Heavy Ind | Rolling mill |
| US4898014A (en) * | 1988-12-23 | 1990-02-06 | United Engineering, Inc. | Roll shifting system for rolling mills |
| DE4208075A1 (en) * | 1992-03-13 | 1993-09-16 | Schloemann Siemag Ag | ROLLING MILLS |
| DE4308743C2 (en) * | 1993-03-19 | 2003-03-20 | Sms Demag Ag | rolling mill |
| FR2725389B1 (en) * | 1994-10-06 | 1996-12-27 | Clecim Sa | LAMINATION INSTALLATION |
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- 2000-03-01 CN CNB2004101007998A patent/CN100335189C/en not_active Expired - Lifetime
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| JP2020518460A (en) * | 2017-05-03 | 2020-06-25 | エス・エム・エス・グループ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Rolling stand for rolling metal materials |
| CN112243394A (en) * | 2018-05-29 | 2021-01-19 | 日本制铁株式会社 | Rolling mill and setting method of rolling mill |
| US11872613B2 (en) | 2018-05-29 | 2024-01-16 | Nippon Steel Corporation | Rolling mill, and method for setting rolling mill |
| CN111250543A (en) * | 2018-11-30 | 2020-06-09 | 上海梅山钢铁股份有限公司 | Reversible mill clearance eliminating device |
| CN113853256A (en) * | 2019-05-23 | 2021-12-28 | 钢铁普蓝特克股份有限公司 | Rolling mill, rolling method, and method for operating work roll |
| CN112705568A (en) * | 2019-10-25 | 2021-04-27 | 普锐特冶金技术日本有限公司 | Rolling mill |
| CN112705572A (en) * | 2019-10-25 | 2021-04-27 | 普锐特冶金技术日本有限公司 | Rolling mill and rolling method |
| CN113950383A (en) * | 2019-10-25 | 2022-01-18 | 普锐特冶金技术日本有限公司 | Rolling mill |
| CN112705568B (en) * | 2019-10-25 | 2022-11-25 | 普锐特冶金技术日本有限公司 | Rolling mill |
| CN112705572B (en) * | 2019-10-25 | 2022-12-23 | 普锐特冶金技术日本有限公司 | Rolling mill and rolling method |
| CN113950383B (en) * | 2019-10-25 | 2023-08-29 | 普锐特冶金技术日本有限公司 | rolling mill |
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|---|---|
| CN100335189C (en) | 2007-09-05 |
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