CN1396010A - Rolling mill, rolling equipment and rolling method - Google Patents

Rolling mill, rolling equipment and rolling method Download PDF

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Publication number
CN1396010A
CN1396010A CN 02121876 CN02121876A CN1396010A CN 1396010 A CN1396010 A CN 1396010A CN 02121876 CN02121876 CN 02121876 CN 02121876 A CN02121876 A CN 02121876A CN 1396010 A CN1396010 A CN 1396010A
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China
Prior art keywords
diameter
intermediate calender
wmax
calender rolls
roller
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CN100448558C (en
Inventor
小林裕次郎
二瓶充雄
堀井健治
小林秀雄
中前弘和
松本浩一
山田繁一
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Hitachi Ltd
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Hitachi Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B21B13/142—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls by axially shifting the rolls, e.g. rolls with tapered ends or with a curved contour for continuously-variable crown CVC
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/36—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by cold-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/001—Convertible or tiltable stands, e.g. from duo to universal stands, from horizontal to vertical stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/025—Quarto, four-high stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/028—Sixto, six-high stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/06—Width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/02—Roll dimensions
    • B21B2267/06—Roll diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2269/00—Roll bending or shifting
    • B21B2269/02—Roll bending; vertical bending of rolls
    • B21B2269/04—Work roll bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2269/00—Roll bending or shifting
    • B21B2269/02—Roll bending; vertical bending of rolls
    • B21B2269/06—Intermediate roll bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2269/00—Roll bending or shifting
    • B21B2269/12—Axial shifting the rolls
    • B21B2269/16—Intermediate rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/42—Control of flatness or profile during rolling of strip, sheets or plates using a combination of roll bending and axial shifting of the rolls

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)

Abstract

The rolling mill is provided with a pair of upper and lower work rolls, a pair of upper and lower intermediate rolls, a pair of upper and lower back-up rolls and roll bending devices for respectively imparting bending forces to the work rolls and the intermediate rolls. In the case the maximum usable width of a rolled stock is Wmax (mm), the diameter Dw of the work roll is defined as the range of 300+50&times (Wmax-1200)/300<=Dw<=375+50&times (Wmax-1200)/300, the diameter Di of the intermediate roll is defined as the range of Dw<=Di<=450+75&times (Wmax-1200)/300, and a work roll driving device for rotationally driving the work rolls is provided.

Description

Milling train, rolling equipment and milling method
Background of invention
Invention field
The present invention relates to a kind of milling train, rolling equipment and milling method.
DESCRIPTION OF THE PRIOR ART
JP57-202908A and JP62-275508A disclose one in rolling field, especially six grades of milling trains in cold-rolling equipment (hereinafter referred to as " UC machine "), wherein above-mentioned UC machine comprise that one applies the roller bending device of bending force and at least one moves the mobile device of intermediate calender rolls along the roll axial direction to working roll and intermediate calender rolls.JP1-154807A discloses another kind of milling train.
If JP57-202908A has described the allowed band that work roll diameter that the intermediate calender rolls diameter is equal to, or greater than 1.5 times can limit working roll and the contour correction of intermediate calender rolls roll bender.
JP62-275508A discloses a kind of working roll, and its diameter is littler 0.3 times than backing roll diameter.
JPA1-154807 discloses a kind of milling train, and its work roll diameter is wide littler 0.15 times than lath.It has been described needs a backing roll as intermediate calender rolls or strengthen roller and prevent the working roll lateral drift.Roomy 0.25 times of the diameter that it has also described intermediate calender rolls or backing roll than lath, but do not mention maximum gauge.
Above-mentioned prior art is intended to improve control ability.But, when improving control ability, but producing a problem, machine is complicated and huge more, has increased equipment cost, has reduced the economic life.
Summary of the invention
Thus, people are desirable to provide a kind of bar milk, rolling equipment and drive the milling method of working roll, make its performance be approximately equal to or be better than the control characteristic of lath convex surface simultaneously, and this can have the reinforcement roller of allowing minor diameter by use and realize.
The purpose of this invention is to provide a kind of bar milk and the rolling equipment that can guarantee suitable lath convex surface control ability.
The invention is characterized in, the upper working rolls and lower working rolls that comprises (1) a pair of rolling workpiece, (2) a pair of intermediate calender rolls up and down that supports these working rolls respectively, (3) a pair of roller of reinforcement up and down that supports these intermediate calender rolls respectively, and (4) apply the roller bending device of bending force to each working roll and intermediate calender rolls.Further aspect of the present invention is, comprise a working roller driving device, this device drives working roll under the following conditions, promptly suppose the wide Wmax (mm) of being of maximum functional lath of workpiece, the diameter Dw of working roll is in the scope of 300+50 * (Wmax-1200)/300≤Dw≤375+50 * (Wmax-1200)/300, and the diameter Di of intermediate calender rolls is in the scope of Dw≤Di≤450+75 * (Wmax-1200)/300 simultaneously.
Brief description of drawings
The figure that Fig. 1 concerns between wide and each roller diameter for expression one embodiment of the invention middle plate strip;
The figure of Fig. 2 for representing that another embodiment of the present invention middle plate strip is wide and strengthening concerning between roller diameter;
Fig. 3 is the figure of summation relation between wide and roller diameter for expression the present invention another embodiment middle plate strip;
Fig. 4 is the schematic cross section of six grades of milling trains among another embodiment of the present invention;
Fig. 5 is the vertical section schematic diagram of six grades of milling trains among another embodiment of the present invention;
Fig. 6 is the end face schematic diagram of six grades of milling trains among another embodiment of the present invention;
The figure of Fig. 7 for concerning between expression work roll diameter and rolling line pressure;
Fig. 8 is the figure of quadratic power amount border (magin) characteristic of 1200mm for the expression lath is wide;
Fig. 9 is the curve map of the biquadratic amount border characteristic of 1200mm for the expression lath is wide;
Figure 10 is the curve map of the quadratic power ratio characteristic of 1200mm for the expression lath is wide;
Figure 11 is the curve map of the biquadratic ratio characteristic of 1200mm for the expression lath is wide;
Figure 12 is the curve map of the quadratic power amount border characteristic of 1200mm for the expression lath is wide;
Figure 13 is the curve map of the quadratic power amount border characteristic of 1200mm for the expression lath is wide;
Figure 14 is the curve map of the quadratic power amount border characteristic of 1200mm for the expression lath is wide;
Figure 15 is the curve map of the quadratic power amount border characteristic of 1200mm for the expression lath is wide;
Figure 16 is the curve map of the quadratic power amount border characteristic of 1200mm for the expression lath is wide;
Figure 17 is the curve map of the quadratic power amount border characteristic of 1200mm for the expression lath is wide;
Figure 18 is the curve map of the biquadratic amount border characteristic of 1200mm for the expression lath is wide;
Figure 19 is the curve map of the biquadratic amount border characteristic of 1200mm for the expression lath is wide;
Figure 20 is the curve map of the quadratic power ratio characteristic of 1200mm for the expression lath is wide;
Figure 21 is the curve map of the quadratic power ratio characteristic of 1200mm for the expression lath is wide;
Figure 22 is the reinforcement roller diameter of 1200mm and the curve map of secondary and biquadratic amount border characteristic for the expression lath is wide;
Figure 23 is the reinforcement roller diameter of 1200mm and the curve map of secondary and biquadratic amount border characteristic for the expression lath is wide;
Figure 24 is the curve map of the quadratic power amount border characteristic of 1500mm for the expression lath is wide;
Figure 25 is the curve map of the quadratic power amount border characteristic of 1500mm for the expression lath is wide;
Figure 26 is the curve map of the quadratic power amount border characteristic of 1500mm for the expression lath is wide;
Figure 27 is the curve map of the quadratic power amount border characteristic of 1500mm for the expression lath is wide;
Figure 28 is the curve map of the quadratic power amount border characteristic of 1500mm for the expression lath is wide;
Figure 29 is the curve map of the quadratic power amount border characteristic of 1500mm for the expression lath is wide;
Figure 30 is the curve map of the quadratic power amount border characteristic of 1500mm for the expression lath is wide;
Figure 31 is the curve map of the quadratic power amount border characteristic of 1500mm for the expression lath is wide;
Figure 32 describes the figure of lath convex surface data and working roller bending machine influence function for expression;
Figure 33 is the curve map of the biquadratic amount border characteristic of 1500mm for the expression lath is wide;
Figure 34 is the curve map of the biquadratic amount border characteristic of 1500mm for the expression lath is wide;
Figure 35 is the curve map of the quadratic power ratio characteristic of 1500mm for the expression lath is wide;
Figure 36 is the reinforcement roller diameter of 1500mm and the curve map of secondary and biquadratic amount border characteristic for the expression lath is wide;
Figure 37 is the reinforcement roller diameter of 1500mm and the curve map of secondary and biquadratic amount border characteristic for the expression lath is wide;
Figure 38 is the figure of a kind of continuous cold-rolling equipment of expression;
Figure 39 is the figure of a kind of reversible cold-rolling equipment of expression; And
Figure 40 is for describing the schematic diagram of lath convex surface.
The explanation of preferred embodiment
(embodiment)
Below describe with reference to the accompanying drawings according to embodiments of the invention:
The universal architecture of six grades of milling trains (UC machine) in one embodiment of the invention at first, will be described.Fig. 4 is the side view of six grades of milling trains of this embodiment.Fig. 5 and Fig. 6 are the profile along arrow II among Fig. 4 and I direction.
As shown in Figs. 4-6, these six grades of milling trains comprise and a pair ofly directly contact and the upper working rolls and lower working rolls 2 of rolling workpiece the intermediate calender rolls up and down 3 of each working roll 2 of a pair of supporting, and the roller of reinforcement up and down 4 of each intermediate calender rolls 3 of a pair of supporting with workpiece 1.One bearing holder (housing, cover) 8 and bearing holder (housing, cover) 9 are installed in each roller end of working roll 2 and intermediate calender rolls 3.As shown in Figure 5, working roller bending device 10 and 11 have been installed, wherein each roller is crooked under the effect of the power that vertically is applied to bearing holder (housing, cover) 8 and bearing holder (housing, cover) 9.They are supported by cover 5 by the bearing holder (housing, cover) 6 of strengthening roller 4.
One hydraulic lift 7 is installed in as lowering or hoisting gear and overlaps 5 bottom, and the bearing holder (housing, cover) 6 of following reinforcement roller 4 moves in vertical direction by this lowering or hoisting gear, and the lifting workpiece 1 thus.
In following explanation, will be called the increase bending apparatus towards the hydraulic cylinder 10a and the 11a of the direction bending in the gap that increases working roll 2, and hydraulic cylinder 10b that especially will be crooked in the opposite direction and 11b are called and reduce bending apparatus.
A pair of intermediate calender rolls 3 up and down is equipped with the roller mobile device, and they can move in the axial direction like this.An example of this mobile device is described with reference to Fig. 6.Fig. 6 represents (1) one moving support element 12, bearing holder (housing, cover) 9 in order to supporting intermediate calender rolls 3, (2) the one mobile unit heads 13 that are attached thereto, and (3) one move the assemble/disassemble device, and this device comprises a clubfoot 14 that freely connects one of intermediate calender rolls bearing holder (housing, cover) 9 and is installed in this and moves and be connected cylinder 15 on the unit head 13.In addition, a movable cylinder 16 that is fixed on the cover 5 links to each other with slip-on head 13.This structure allows mobile assemble/disassemble device to be fixed on installment state to handle movable cylinder 16, and intermediate calender rolls 3 and moving support element 12 can move to the position of expectation at roll shaft on direction whereby.Especially, an intermediate calender rolls bending apparatus 11 is located on the moving support element 12.Even working roll 2 is moved like this, the application point of bending force can not change yet, and this structure is guaranteed a bigger mobile stroke.
In the present embodiment, the roller end of intermediate calender rolls 3 is equipped with a chamfering 3a who is approximately 1000R, and it is generally taper, as shown in Figure 4.Especially, the distance between chamfering 3a starting point and the lath edge 1 will be called " UC δ " hereinafter.When the starting point of this chamfering 3a is positioned at the lath edge when outside, described UC δ be on the occasion of, as if being positioned at inside, lath edge, UC δ is a negative value.
In order to provide a bar milk to keep performance to equal simultaneously or to be better than the performance of prior art milling train in above-mentioned six grades of milling trains, the present invention stresses the combination of roller diameter.Also do not consider the range of roller diameter combination and the limit of profile control characteristic in the prior art.This is because also with due regard to do not arrive this profile control and two aspects of size reduction.When attempting doing such research, based on the numerical value of the roller diameter combination of the different condition so complicated quite difficulty of research that makes that becomes according to the profile simulation program.In these cases, emphasis is obtained the present invention to important factor in order research of coming from various conditions under these situations, and has obtained new information and discovery based on various conditions.
Supposition lath convex surface profile is regulated by leveling or similar adjusting and left-right symmetry in following explanation, and it is constant to pass the thickness of the wide lath of lath at entrance side before rolling.Suppose that simultaneously the lath heart is an initial point,, utilize the thick distribution function of this variable rolling back outlet side lath can be expressed as h (x) to be x (=-1.0 to+1.0) according to the wide standardized standard coordinate of lath.In this situation, represent that the lath convex surface function C (x) of rolling back lath convex surface profile can be defined as
C(x)＝h(x)-h(0)????????????????????????(1)
That is to say, in following explanation, the lath convex surface be defined in the lath thick h (0) relevant with the wide center of lath and and the thick h of lath (x) that changes with the wide x of lath between deviation.Like this, when the wide x of lath goes up the thick thickness greater than the lath heart of certain any lath, be negative value just in that lath convex surface function C (x).Especially work as working roll or intermediate calender rolls bending force (Fw and Fi) and do not do the time spent, the lath convex surface is called with reference to the lath convex surface, and the lath convex surface function of this moment is C b(x).At this with reference to lath convex surface function C b(x) the rolling left-right symmetry of supposition in, the even function of its available x is expressed so.As everyone knows, a kind of like this function can simply be approximately quadratic power expression formula and biquadratic expression formula and, shown in following equation (2):
C b(x)＝a b2×X 2+A b4×X 4?????????????????????????????(2)
The A here B3And A B4The coefficient of representing quadratic power and biquadratic expression formula respectively, they determine by rolling condition, as roller diameter, lath thickness, rolling load and other.In following explanation, the coefficient of these quadratic powers and biquadratic expression formula is called as with reference to the quadratic power of lath convex surface and biquadratic component.Because X specifically equals in the lath marginal portion ± and 1.0, these coefficients have been represented the maximum lath convex surface value (μ) at lath edge quadratic power and biquadratic component.In addition, when the lath convex surface was not controlled by roll bender, outlet side was at the lath thick generally less (convex form) near lath edge; Therefore, the coefficient A in the expression formula (2) B2And A B4Be negative value.
On the contrary, (Fw, Fi) influence function to the lath convex surface is respectively C to suppose the bending force of working roll and intermediate calender rolls in the UC machine w(x) and C i(x).It is proportional that bending power is considered to approximate bending force with each roller to the effect of lath convex surface.In addition, each bending power to the effect of lath convex surface be considered to be approximately equal to quadratic power and biquadratic expression formula and, be similar to the situation of benchmark lath convex surface.
Suppose to be similar to and be respectively Fwmax and Fimax by the working roll of each roller diameter decision and the maximum deflection power of intermediate calender rolls.By their normalization bending force be expressed as η w(=Fw/Fwmax) and η i(=Fi/Fimax).The influence function C of each roll bender w(x) and C i(x) be thought as follows:
C w(x)＝η w×(A w2×X 2+A w4×X 4)????????????????(3)
C i(x)＝η i×(A i2×X 2+A i4×X 4)????????????????(4)
Here, the coefficient A of quadratic power and biquadratic expression formula W2And A W4Be constant, be similar to the situation of equation (2) by the rolling condition decision.In following explanation, they will be called as the quadratic power and the biquadratic component of each roll bender.Each normalization the roll bending force near the thick increase direction of the point of lath edge (concave) outlet end plate bar be on the occasion of, this direction is called as in following explanation increases direction (increase bending machine).Rightabout will be called as and reduce direction (reducing bending machine).Reducing under the bending machine situation η wAnd η iBe expressed as negative value.Or rather, the coefficient in (3) and (4) is had any different increasing and reduce direction, but difference is quite little.In addition, following explanation will be studied mainly in the control characteristic that increases on the direction; Therefore, below will utilize the coefficient value of this direction.
It seems from above-mentioned explanation, when maximum increases bending force η w=η i=+1.0 when being handled independently of each other, and the coefficient of equation (3) and (4) has been represented the lath convex surface amount of the quadratic power and the biquadratic component of lath edge x=± 1.0.Thus, the coefficient A of equation (3) and (4) W2, A W4And A I2Be generally on the occasion of, but A I4And A W2Can just can bear, depend on calculated case.
In addition, approximate maximum deflection power Fmax by each roller diameter decision can be regulated by the allowable stress σ of roll neck, and with the ratio that square is approximated to of given roller diameter D.Roll neck diameter d and roller diameter D are approximated to ratio, for example, and d=0.6 * D (or approximately).On the contrary, when the moment of flexure on acting on roll neck was M, the bending stress of roll neck was σ ∝ M/d 3∝ M/D 3In addition, when the application point of maximum deflection power Fmax and the distance between the roll neck were " L ", " L " and roller diameter D were approximated to ratio.Therefore, moment M is σ ∞ Fmax/D 2Pass between maximum deflection power Fmax and roller diameter D is and σ ∝ Fmax/D 2Be approximated to ratio.Under the situation of forged steel roll, described proportionality constant is approximately 0.5 according to the design experiences value.In following explanation,, working roll and intermediate calender rolls are done following supposition in order to oversimplify.
Fmax＝0.5×D 2/1000??????????????????(5)
The diameter of the D here (mm) expression working roll and intermediate calender rolls.In this case, the maximum deflection power Fmax (ton) of equation (5) is corresponding with the value of single roller.
Below the method for quadratic power and biquadratic expression formula coefficient in the described profile simulated behavior equation is obtained in explanation.In general lath convex surface profile, one so-called " edge decline " zone is arranged, near the lath thickness the lath edge can suddenly reduce, as shown in figure 40.In this zone, contain a big error by the approximation of the maximum biquadratic expression formula of maximum biquadratic expression formula (2) to (4) expression, this has just caused a problem.Therefore, the interior use in the zone lath convex surface data that descend regional except described edge are determined the coefficient of equation (2) to (4).This research in used lath convex surface scope approximate greatly whole lath wide 90%.Therefore, the quadratic power at equation (2) to (4) middle plate strip edge and biquadratic component equal the extrapolation number of the coefficient determined based on the lath convex surface data of using about 90% wide scope of described whole lath.But, people have fully confirmed and can represent lath convex surface characteristic with this without doubt.When having obtained the coefficient of the middle benchmark lath convex surface function of equation (1), for example, lath convex surface outline data with approximate extents, utilize the bending force of each working roll and intermediate calender rolls wherein to be decided to be the data of 0 lath convex surface approximate extents, can determine coefficient in the mode of guaranteeing equation (2) best applications according to known method.For example, when having obtained the coefficient of the middle working roller bending forcing press of equation (3), η w=+1.0 o'clock lath convex surface difference can be used η w=0 o'clock lath convex surface is that reference calculation is come out.The result should be the best approximation of described approximate extents, thereby can determine coefficient.
To (4), a very big scope might be crossed in the approximate overlay region of lath convex surface C (x) after the control, can be expressed as follows according to the above-mentioned simulation equation of having specialized (2):
C(X)＝C b(X)+C w(X)+C i(X)
＝(A b2+η w×A w2+η i×A i2)X 2+(A b4+η w×A w4+η i×A i4)X 4?????????(6)
Consider the coefficient of equation (6) each quadratic power of right-hand side and biquadratic expression formula, suppose normalization bending force η w=η i=1.0, can obtain following equation:
MAR(A2)＝A b2+A w2+A i2?????????????????????????(7)
MAR(A4)＝A b4+A w4+A i4?????????????????????????(8)
Consider to apply maximumly when increasing bending force that to working roll and intermediate calender rolls the quadratic power and the biquadratic component of rolling machine system lath convex surface profile control function we can say that above-mentioned MAR (A2) and MAR (A4) have represented the limit of controlling.Therefore, when described value was negative value, the control ability of controlling component about each was inadequate.In following explanation, described parameter MAR (A2) and MAR (A4) are called as the limit of quadratic power and biquadratic component.In addition, for a kind of bar milk is provided, as mentioned above, it is considerable selecting the optimum combination condition to various roller diameters.For realizing this point,, and will illustrate the condition of relevant preferred roller diameter combination with the limiting behaviour of research described quadratic power and biquadratic component under various rolling conditions.
Table 1 has represented to be used for detecting the lath convex surface simulated conditions of described quadratic power and biquadratic component limiting behaviour.
Table 1
Maximum lath is wide Roll body length (mm) Lath thickness condition (A) Lath thickness condition (B)
Entrance side (mm) Outlet side (mm) Entrance side (mm) Outlet side (mm)
??1200 ??1400 ???1.0 ???0.7 ???0.7 ????0.5
??1500 ??1600 ???1.0 ???0.7 ???0.7 ????0.5
As mentioned above, suppose used maximum lath wide be 1200 and 1500mm, the roll body length of corresponding milling train is 1400 and 1600mm.So because when the lath broad, use maximum lath wide in the research of the general difficulty of profile control at us, thereby should preferentially detect characteristic in this case.Wide corresponding to described two kinds of maximum laths, adopt two kinds of thick conditions of lath to carry out simulation.Under the thick condition of lath (A), suppose that the lath of the port of export is thick big and rolling load is less.On the contrary, under the thick condition of lath (B), suppose that the lath of outlet side is thick in big than under the thick condition of lath (A) of the little and rolling load under the thick condition of lath (A).Fig. 7 has represented the relation between each lath thick condition bottom working roll diameter and rolling load.Can find out clearly that from Fig. 7 the thick condition of the lath of entrance side and outlet side is constant, so rolling load changes along with the variation of work roll diameter.This is because entrance side uses the identical thick condition of lath with outlet side in comparative study, even work roll diameter has changed.In addition, will in wide region, utilize combination condition research to each roller diameter.These conditions will be illustrated in the explanation to result of calculation singly.The shift position of intermediate calender rolls often is set to about UC δ=0 or tens millimeter on positive direction.In the inventor's analog study, laws and decrees UC δ=0.Each roller is all used straight roller, initially do not have the lath convex surface.When maximum lath is wide when being 1200mm and 1500mm, condition shown in the table 1 will be called as the equivalent condition of 4-width and 5-width machine.The thick condition of lath (A) and (B) will be called as soft material and hard material condition.Described condition is the basis that is assumed to so-called calendering rolling plant in a common cold contrary rolling plant and the equipment for continuously rolling milling train.
Below analog result will be described.
Fig. 8 has represented when strengthening roller diameter Db=1300mm, an example on the quadratic power amount border that calculates under the equivalent condition of soft material and 5-width machine.Transverse axis is represented work roll diameter among Fig. 8, and the longitudinal axis is represented the intermediate calender rolls diameter.Connect contour that point that quadratic power amount border equates obtained as shown in the figure, discuss with respect to the depth displacement of 2.5 μ.In following explanation, this figure will be called as quadratic power amount border performance diagram.This figure easily is illustrated in quadratic power amount border and gets the maximum place, has the combination of working roll and intermediate calender rolls diameter.The inventor is that first passes through the people that this characteristic is found in simulated experiment many times.
Point in the performance diagram of described quadratic power amount border on the identical contour, for example, the combined spot of roller diameter shown in the P1 to P4 has roughly the same quadratic power amount border among the figure.Therefore, in order to provide a bar milk under the prerequisite that keeps identical quadratic power amount border characteristic, the combination of roller diameter shown in the P3 can be described as a preferred compositions.The basic concept that above explanation has been arranged the following describes preferred compositions scope how to determine roller diameter:
Roller combination zone among Fig. 8 is divided into four parts by horizontal line X and the vertical line Y by the about center of contour group.In this example, this zone is passed point and the work roll diameter that the intermediate calender rolls diameter is 450mm and is divided by the straight line of the point of 375mm.Four zones of Xing Chenging are called as first to fourth zone like this, as shown in the figure.Roller diameter combined spot with roughly the same quadratic power amount border has in four zones.Wherein, the 3rd zone is preferred.That is to say that the 3rd zone is the place that can form milling train with minimum configuration.
When quadratic power amount border performance diagram after almost the straight line by quadratic power amount border contour group switching centre is divided into four zones by two, miniaturization can be described as very desirable the roller combination zone in the 3rd zone for milling train.Otherwise, if construct the roller diameter combination in described the 3rd zone, just might obtain quadratic power amount border making up on the roughly the same position with other regional central roll, and from can find out that miniaturization is preferred for milling train for this.The front is stated and is based on that quadratic power amount border characteristic curve considers.
Biquadratic amount border characteristic curve below is described.Fig. 9 is based on the condition identical with Fig. 8.Work roll diameter is used as parameter, and transverse axis is represented the intermediate calender rolls diameter, and the longitudinal axis is represented biquadratic amount border.The figure shows at the intermediate calender rolls diameter and be approximately 450mm or when bigger, biquadratic amount boundary value does not almost have anything to change, irrelevant with work roll diameter.Even if it is 450mm or when bigger, biquadratic amount boundary value can not increase yet that biquadratic amount border characteristic curve shows the intermediate calender rolls diameter; On the contrary, the miniaturization meeting of milling train is interrupted.In addition, described intermediate calender rolls diameter has found the maximum gauge of an approximate match in described the 3rd zone.This expression with regard to the characteristic curve of biquadratic amount border, determines that by quadratic power amount border characteristic curve the maximum gauge of intermediate calender rolls is suitable and sufficient.That is to say that when considering biquadratic amount border characteristic curve, above-mentioned the 3rd zone is preferred.This figure shows that further biquadratic amount border diminishes with work roll diameter and intermediate calender rolls diameter, and becomes big.Therefore, consider biquadratic amount boundary value, the 3rd zone that work roll diameter and intermediate calender rolls diameter have reduced is more favourable than other zone.With respect to quadratic component, this biquadratic component has usefulness is pretended in demonstration near lath edge characteristic.In other words, adopt roller diameter combination range in the 3rd zone for guaranteeing that the edge descends and hot convex surface is controlled more effective.
But, when middle roller diameter is far smaller than work roll diameter, produce a different problem again.People it is generally acknowledged the quadratic component of intermediate calender rolls bender control lath convex surface profile, the high order component of working roller bending forcing press control lath convex surface.This is used to limit each roll bender to the effect of lath convex surface and the control of being convenient to reality.For reaching this purpose, the controlling value of the quadratic component of intermediate calender rolls bender preferably is substantially equal to or greater than the controlling value of the quadratic component of working roller bending forcing press.Thus, as the ratio (=A that considers working roller bending forcing press quadratic component controlling value and intermediate calender rolls bender quadratic component controlling value W2/ A I2) time, this value preferably is no more than 1.0 to one bigger degree.Be the research this point, Figure 10 represented with Fig. 8 the same terms under the characteristic curve of ratio (hereinafter referred to as " quadratic power than ") of described quadratic component controlling value.In Figure 10, transverse axis is represented work roll diameter, and the longitudinal axis is represented the intermediate calender rolls diameter.Quadratic power is expressed as 0.2 spacing than identical contour with depth displacement.But the combination range of roller diameter is roughly corresponding to the 3rd zone shown in Figure 8, and the straight line L among the figure represents that work roll diameter equals the point of intermediate calender rolls diameter.In following explanation, this figure will be called as quadratic power ratio characteristic curve map.This figure shows that straight line L top working roll diameter is 375mm or more hour, described quadratic power ratio is approximately 1.2 or littler.Thus, for ease of the control of reality, the intermediate calender rolls diameter preferably is equal to or greater than work roll diameter.From described explanation, the range of work of intermediate calender rolls diameter should be equal to or greater than work roll diameter.Straight line L shown in Figure 8 has represented that described intermediate calender rolls diameter equals the point of work roll diameter.Thus, preferred roller diameter combination range should be positioned at described the 3rd zone, and in the upper end of straight line L.
When considering the operational stability of milling train, preferably adopt working roll to drive type.On the contrary, if work roll diameter has reduced, the desired roll torque of drive system intensity can not directly send working roll to.In this case, intermediate calender rolls is driven.Thus, apply needed roll torque according to the tangential force that is produced that rubs between intermediate calender rolls and working roll to working roll.The tangential force that appears at described working roll makes working roll to the horizontal direction bending.This means the skew that the external interference that changes as roll torque will produce horizontal direction.This will influence operational stability and profile again conversely.For reducing this adverse effect, a kind of adjusting deviation device or support roller are installed, as disclosed among the open NO.Hei5-50109 (US5406818) of Japanese patent application on the working roll of being everlasting.But it is more complicated that this has produced structure again, the problem that production cost is higher.When a kind of like this milling train was used on the contrary rolling plant of the reverse what is called that repeats rolling operation, the tuningout position must change along with rolling direction.The output that this has reduced rolling equipment makes rolling operation become difficult, because depressing position must readjust along with the variation of tuningout position.
The limit that described working roll drives is determined by the fatigue strength of driving shaft usually.During rolling thicker lath, needed roll torque is also bigger usually.For example, suppose the rolled lubricating oil rolling low carbon steel of using solubility.Suppose that simultaneously work roll diameter is 300mm, lath is wide to be 1200mm, and the thickness of lath arrival end is 4mm and to depress percentage be 50%.Roll torque in this case is approximately every roller 9.5t.m.The admissible moment that is used to drive described working roll is approximately 10t.m under axle fatigue strength.For the restriction working roll drives, minimum work roll diameter is preferably 300mm or bigger in this case.
Below research is when strengthening roller diameter, soft or hard material is rolling and the wide change of maximum functional lath after, have a look described characteristic and whether still can keep.The rolling operation of Figure 11 to 13 expression soft material.The rolling operation of Figure 14 to 17 expression hard material.Every width of cloth figure represents quadratic power amount border characteristic when using a 4-width machine equivalent condition.But every width of cloth figure has provided one and has strengthened roller diameter Db.The dash area in the 3rd zone and the dash area among Fig. 8 are the same area among the figure.These figure show, along with the soft or hard material is strengthened reducing of roller diameter,
1) quadratic power amount boundary value reduces.
2) move to the combination zone of the larger diameter side of working roll and intermediate calender rolls in the maximum of points zone on quadratic power amount border.Be no more than 1000mm if strengthen roller diameter, this does not have very big variation.But during as if employing hard material and Db=850mm, described maximum point zone will move to larger diameter side to a greater degree.
This shows if strengthen roller diameter and is no more than 1000mm, and the quadratic power amount boundary value that obtains of dash area roughly comprises the value as obtaining in other zone in the drawings.Thus, if described reinforcement roller diameter allow, we can say that the roller diameter combination range of described the 3rd area shading part roughly has the quadratic power amount boundary value the same value regional with other, and suit for the miniaturization of milling train.
On the contrary, if when adopting hard material and Db=850mm as shown in figure 17, the border that obtains in the first area for example, is not talkatively covered by described shadow region.In this case, triangular combination is inadequate and is not suitable for the miniaturization of milling train.Therefore, from quadratic power amount border characteristic, strengthen roller diameter and preferably be not less than 1000mm.We comprise that with explanation the reinforcement roller diameter is combined in the research of interior milling train miniaturization later on.
Above stated specification has related to quadratic power amount border characteristic.Biquadratic amount border characteristic below will be described: in Figure 18 and 19, transverse axis is represented the biquadratic amount border characteristic of soft or hard material, and the longitudinal axis is represented the working shaft diameter, and intermediate calender rolls diameter Di provides as a parameter here.Solid line and dotted line are corresponding to the situation of Db=1300 and 1000mm among the figure.Find out from these figure are clear, when work roll diameter and intermediate calender rolls diameter hour, biquadratic amount border is bigger.In addition, even the intermediate calender rolls diameter has surpassed 450mm, biquadratic amount border does not almost have any variation.Cause few when the reinforcement roller diameter be 1000mm or when bigger, these characteristics are less than what big difference as can be seen.Therefore, from these characteristic curves, the intermediate calender rolls diameter preferably is no more than 450mm.
Figure 20 and 21 represents when the reinforcement roller diameter is 1000mm, the quadratic power ratio characteristic curve of soft material and hard material.When with Figure 10 and 20 in curve under the soft material situation compare, both have shown characteristic much at one.This shows that the quadratic power ratio characteristic do not strengthened the influence of roller diameter.On the contrary, relatively Figure 20 and 21 can clearly find out that the quadratic power under the hard material situation is smaller.This show only the ratio of the quadratic power under the soft material situation is studied just enough.Figure 21 shows when work roll diameter is no more than 375mm, equals on the straight line L of work roll diameter at the intermediate calender rolls diameter and above zone, and the quadratic power ratio is approximately 1.2 or littler.Like this, because above-mentioned same cause, the zone that the intermediate calender rolls diameter is equal to or greater than work roll diameter is available combination range.
But in the milling train of reality, usually allow each roller range of work minimum and maximum gauge to be approximately 10% to 15%.Thus, if maximum available work roller diameter is 300 to 375mm, then minimum intermediate calender rolls diameter will be approximately equal to or greater than maximum available work roller diameter.
Above stated specification can be summarized as follows: when the reinforcement roller diameter is equal to or greater than 1000mm, suppose that the combination zone between work roll diameter and intermediate calender rolls diameter is the 3rd zone.Can obtain and the roughly the same characteristic that obtains in these zones the quadratic power amount border that obtains according to fixed reinforcement roller diameter.But can guarantee to obtain to biquadratic amount border, better than the characteristic curve that obtains in those fields.And then can provide a small-sized milling train.Because adopt working roll to drive to guarantee its stability in rolling operation, work roll diameter should be equal to or greater than 300mm.For ease of the control of roll bender, the intermediate calender rolls diameter should be equal to or greater than work roll diameter.By above-mentioned explanation, can obviously find out, be 1000 or when bigger, dash area represents more can provide the scope of a bar milk in the performance diagram of quadratic power amount border when strengthening roller diameter.In addition, minimum intermediate calender rolls diameter is substantially equal to or is preferable greater than the maximum available work roller diameter in 300 to 375mm scopes.This defines working roll and intermediate calender rolls bender to the influence degree of lath convex surface undetermined, is convenient to working control.For example, when maximum available work roller diameter was 375mm, minimum intermediate calender rolls diameter was preferably 375mm or bigger.
For guaranteeing further miniaturization, should reduce to strengthen the diameter of roller.Qualification to it is below described.
Quadratic power amount border and biquadratic amount border when Figure 22 and 23 has represented that work roll diameter is 350mm, transverse axis represents to strengthen roller diameter, and the intermediate calender rolls diameter is as parameter.Figure 22 represents the characteristic of soft material, and Figure 23 represents the characteristic of hard material.As seen from the figure, diminish if strengthen roller diameter, quadratic power amount border reduces, but biquadratic amount border increases.In addition, be 1300mm or bigger even strengthen roller diameter, quadratic power amount border and biquadratic amount border should not show bigger variation.Thus, for a bar milk is provided, strengthens roller diameter and should not surpass 1300mm.On the contrary, under the hard material situation that Figure 23 provides, be 800mm and intermediate calender rolls diameter when being no more than 350mm when strengthening roller diameter, the almost nil or negative value in quadratic power amount border.This expression quadratic component control is inadequate.This quadratic power amount boundary value becomes according to the combination of intermediate calender rolls diameter.If strengthen roller diameter and be 900mm or when bigger, arbitrary biquadratic amount boundary value is for just.Therefore, by biquadratic amount border characteristic curve, strengthen roller diameter and can be 900mm or bigger.But, as mentioned above, strengthen roller diameter and be preferably 1000mm or bigger by quadratic power amount border characteristic curve.Strengthen roller diameter like this and should be 1000mm or bigger.
Above-mentioned explanation is based on 4-width machine equivalent condition, in this milling train maximum lath wide be 1200mm.The situation of 5-width machine equivalent condition below will be described, maximum lath is wide in this milling train has represented quadratic power amount border characteristic curve under the 5-width machine equivalent condition for 1500mm: Figure 24 to 31.The situation of Figure 24 to 27 expression soft material, the situation of Figure 28 to 31 expression hard material.In every width of cloth figure, provided the reinforcement roller diameter.From these figure, can obviously find out, in this case the degree of shifting to working roll and intermediate calender rolls larger diameter side except the characteristic maximum region in quadratic power amount border than 4-width machine equivalent condition following big, characteristic curve is less than what big difference.Dash area is represented the 3rd zone of Di 〉=Dw in this case, and wherein the intermediate calender rolls diameter range rises to 525mm and comprises 525mm from 350mm, and the work roll diameter scope rises to 425mm and comprises 425mm from 350mm.Described the 3rd zone is by determining with mode identical under the 4-width machine equivalent condition.In other words, Region Segmentation line Dw=425 mm and Di=525mm have comprised and have passed the paracentral point of quadratic power amount border contour winding.But when the reinforcement roller diameter is 1000mm, just be not positioned at described center.In this case, it is not enough strengthening roller diameter.
The minimum diameter of working roll is determined according to profile control characteristic curve.When lath broad and work roll diameter hour, the quadratic component of working roller bending forcing press can be negative value.Give one example, Figure 32 has represented the influence coefficient function of working roller bending forcing press.Based on work roll diameter is 325mm, and intermediate calender rolls and strengthen roller diameter and be respectively 500 and the condition of 1150mm calculates hard material.The quadratic power of working roller bending forcing press and biquadratic component are respectively A in this case W2=-10.21 μ and A W4=136.42 μ.Figure 32 represents lath convex surface data when obtaining quadratic power and biquadratic component, and by the curve that obtains based on described solid line coefficient calculations.In this width of cloth figure, scale is not easy to identify, but is negative value at the influence coefficient functional value of slat center.In other words, we can say,, will produce a convex the effect of slat center if working roller bending power increases to increasing direction.In this case, will produce the lath convex surface of compound prolongation, and make profile control become difficult.Thus, for 5-width machine equivalent condition, consider that above-mentioned actual conditions work roll diameter should be 350mm or bigger.
Figure 33 and 34 has represented biquadratic amount border characteristic curve, and wherein transverse axis is represented the intermediate calender rolls diameter, and work roll diameter is a parameter.Figure 33 represents the situation of soft material, and Figure 34 represents the situation of hard material.Even the figure shows the intermediate calender rolls diameter near 525mm or bigger, biquadratic amount border does not almost have any variation under 5-width machine equivalent condition.On this meaning, we can say to there is no need to increase again diameter.On the contrary, it is more effective for increasing biquadratic amount border to reduce diameter.
In addition, Figure 35 has represented to strengthen the example that roller diameter is a quadratic power ratio characteristic curve under 1150mm and the employing soft material condition.According to this figure, if straight line L top working roll diameter is no more than 425mm, described quadratic power ratio is approximately 1.1 or littler.Therefore, for being easy to working control, the range of work of intermediate calender rolls diameter should be equal to or greater than work roll diameter, is similar to 4-width machine equivalent condition.But preferably, minimum intermediate calender rolls diameter approximately is equal to or greater than the maximum functional roller diameter in the described work roll diameter scope (=350 to 425mm), is similar to 4-width machine equivalent condition.
High-visible by above-mentioned explanation, under 5-width machine equivalent condition, when having determined admissible reinforcement roller diameter, working roll and intermediate calender rolls diameter combination zone are positioned at the 3rd zone.This has provided quadratic power amount border identical with other zone and better biquadratic amount border identical with other zone or that compare.It also provides a kind of bar milk.That is to say, be 1150mm or when bigger when strengthening roller diameter, we can say to be shown in the dash area in the characteristic curve of quadratic power amount border among Figure 24 to 31 to the miniaturization of milling train most preferably.
Be the miniaturization milling train, it is sufficient reducing to strengthen roller diameter.Below will be described.Quadratic power and biquadratic amount border when Figure 36 and 37 has represented that work roll diameter is 400mm, transverse axis represents to strengthen roller diameter, and the intermediate calender rolls diameter is as a parameter.Figure 36 represents the situation of soft material, and Figure 37 represents the situation of hard material.Two figure show that quadratic power amount border also will reduce if strengthening roller diameter reduces, but biquadratic amount border increases on the contrary.Two characteristic curves are identical with curve under the 4-width machine equivalent condition.In addition, be 1400mm or when bigger, quadratic power and biquadratic amount border are without any big variation even strengthen roller diameter.Therefore, for a bar milk is provided, strengthens roller diameter and should be 1400mm or littler.Under the hard material situation in Figure 37, be 1000mm and intermediate calender rolls diameter when being 350mm when strengthening roller diameter, quadratic power amount border is a negative value.This means that quadratic component control is inadequate.This quadratic power amount boundary value is difference with the difference of intermediate calender rolls diameter combination.If strengthening roller diameter is 1100mm or bigger, any one quadratic power amount border is all for just.Therefore, strengthen roller diameter and should be 1100mm or bigger.
Below above-mentioned explanation is summarized.When the maximum functional lath is wide when being 1200mm, available roller diameter combination condition is as follows:
1) work roll diameter Dw should be 300mm to 375mm, comprises 375mm.
The maximum available work roller diameter of determining in described scope (1) is MAX (Dw):
2) intermediate calender rolls diameter Di should be 450mm or littler, should satisfy Di 〉=MAX (Dw)
3) strengthen roller diameter Db and should be 1000mm to 1300mm, comprise 1300mm.
In that the maximum functional lath is wide when being 1500mm:
4) work roll diameter Dw should be 350mm to 425mm, comprises 425mm.
The maximum available work roller diameter of determining in described scope (4) is MAX (Dw):
5) intermediate calender rolls diameter Di should be 525mm or littler, should satisfy Di 〉=MAX (Dw)
6) strengthen roller diameter Db and should be 1100mm to 1400mm, comprise 1400mm.Thereby above-mentioned scope is preferred.Above-mentioned relation will use below with reference to symbol with The Representation Equation.Wmax: maximum available lath wide (mm)
DwMax (DwMin): maximum (minimum) work roll diameter (mm) that maximum available lath is wide when being Wmax.
DiMax (DiMin): maximum (minimum) the intermediate calender rolls diameter (mm) that maximum available lath is wide when being Wmax.
DbMax (DbMin): the maximum (minimum) that maximum available lath is wide when being Wmax is strengthened roller diameter (mm).
Then, according to condition 1) and 4), the wide Wmax of maximum available lath is as variable, and minimum and maximum functional roller diameter can be expressed as follows:
DwMax＝375+50×(Wmax-1200)/300????????????????(9)
DwMin＝300+50×(Wmax-1200)/300????????????????(10)
Equally, according to condition 3) and 6), minimum and maximum reinforcement roller diameter can be expressed as follows:
DbMax＝1300+100×(Wmax-1200)/300??????????????(11)
DbMin＝1000+100×(Wmax-1200)/300??????????????(12)
According to condition 2) and 4), minimum and maximum intermediate calender rolls diameter can be expressed as follows:
DiMax＝450+75×(Wmax-1200)/300????????????????(13)
DiMin＝MAX(Dw)????????????????????????????????(14)
The MAX here (Dw) is the maximum available work roller diameter of determining in the scope of equation (9) and (10).
Solid line among Fig. 1 and 2 has been represented described relation with diagrammatic form, and wherein transverse axis represents that the maximum functional lath is wide, and the longitudinal axis is represented minimum and maximum roller diameter.Straight line A among the figure represents minimum work (centre) roller diameter in the equation (10), straight line B represents maximum functional roller diameter in the equation (9), straight line C represents maximum intermediate calender rolls diameter in the equation (13), and straight line D and E represent the minimum and maximum roller diameter of strengthening in equation (12) and (11).Like this, after having determined that the maximum functional lath is wide, the range of work of work roll diameter is determined on Fig. 1 cathetus A and the top thereof and on straight line B and its underpart.The range of work of intermediate calender rolls diameter should be equal to or greater than by the minimum roller diameter of equation (14) decision and on straight line C and its underpart.The range of work of strengthening roller diameter is on straight line D and the top thereof and on straight line E and its underpart.If adopt a kind of like this roller diameter combination range, quadratic power amount border characteristic curve is identical with the curve that is obtained by selected reinforcement roller diameter, and biquadratic amount border characteristic is equal or bigger.And then explanation can provide a bar milk as described above.Determine that available roller diameter scope is to guarantee that it also is very important in above-mentioned particular range.This has guaranteed that described characteristic curve remains in the available combination scope of each roller diameter, and a bar milk is provided.
The method of milling train miniaturization below will be described.As mentioned above, the usable range that each roller diameter allows in actual milling train is about 10% to 15%.To suppose that in following explanation allowed band is 15%.Thus, when the minimum work roll diameter under 4-width machine and the 5-width machine equivalent condition is 300 and during 350mm, maximum available roller diameter is 300 * 1.15 to 350mm and 350 * 1.15 to 400mm.The numeral here suitably rounds and provides.Dotted line B ' expression among Fig. 1 is through described 2 straight line.Suppose that maximum available work roller diameter at this moment is DwMAX, this available following The Representation Equation:
DwMAX＝375+50×(Wmax-1200)/300???????????????????(15)
With respect to condition 1) and 4) under the maximum functional roller diameter, if with condition 2) and 5) mode that will always keep selects maximum available intermediate calender rolls diameter DiMAX, under 4-width machine and 5-width machine equivalent condition, can obtain respectively so 375 * 1.15 to 425mm and 425 *-1.15 to 500mm.Be illustrated by the broken lines in Fig. 1 through described 2 straight line C '.Described straight line can be used following The Representation Equation:
DiMAX＝450+75×(Wmax-1200)/300????????????????????(16)
With the same manner, condition 3) and 6) use under the minimum roller diameter, provide maximum available reinforcement roller diameter DbMAX and be respectively 1000 * 1.15 to 1150mm and 1100 * 1.15 to 1250mm.Dotted line E ' among Fig. 2 has represented through described 2 straight line.Equally, described explanation can be in order to The Representation Equation down:
DbMax＝1300+100×(Wmax-1200)/300??????????????????(17)
Suppose that maximum available roller diameter is the roller diameter of being represented by described dotted line, so just might provide a bar milk, as above obviously expression like that.Therefore, to work roll diameter, available roller diameter combination range is on straight line A and the top thereof and on straight line B ' and its underpart in this situation, and to middle roller diameter, available roller diameter combination range should be on straight line B and the top thereof and on straight line C ' and its underpart.For strengthening roller diameter, combination range should be on straight line D and the top thereof and on straight line E ' and its underpart.Like this, when available roller scope is 15%, can provide one near the miniaturization of least limit the milling train specification.
Above-mentioned explanation has related to by reducing the method that single roller diameter comes the miniaturization milling train.And then when available roller diameter reduced, rolling-mill housing also reduced, and this is a nature.This can reduce the production cost of rolling-mill housing.In addition, if the contraction in length of rolling-mill housing, the height of factory building also can reduce.That is to say that the rolling-mill housing transportation is required minimum constructive height with general needed height is installed as factory building height.On the contrary, if rolling-mill housing shortens, described needs highly also can reduce.This also can reduce the factory building cost.Naturally, freight also can be cut down.Moreover load variations and frame vibration also reduce.
Obviously find out by above-mentioned argumentation, shorten rolling-mill housing and cut down whole factory engineering expense in fact.Significantly, the length of this rolling-mill housing and roller diameter summation are almost proportional simultaneously.Therefore, described roller diameter summation is as the efficiency index (hereinafter referred to as " miniaturization index ") of performance milling train miniaturization.
When according to equation (15) to (17) these numbers being added together and taking into account the above miniaturization index S, we obtain
S＝1925+225×(Wmax-1200)/300????????????????????(18)
Significantly, the miniaturization index S of described equation (18) has represented at single roller usable range to be that miniaturization in 25% o'clock is to the milling train near least limit.Therefore, miniaturization index S preferably is equal to or less than the value of equation (18) as the scale of expression milling train miniaturization.Straight line S among Fig. 3 has represented described equation (13).But in this case, single roller diameter should be chosen in the scope of equation (9) to (14) decision.Therefore, maximum functional roller diameter and maximum intermediate calender rolls diameter and should equal equation (9) and (13) with.With the same manner, it is represented by solid line 3+C in Fig. 3.If want to realize to add equation (15) and (16) just enough together further miniaturization.This in Fig. 3 by dotted line B '+C ' expression.This method makes might provide a milling train, keeps miniaturization index minimum simultaneously, and quadratic power and biquadratic amount border characteristic curve can remain on and be close on the level that is parity with or superiority over the characteristic that is obtained by the reinforcement roller diameter of choosing.But it should be noted that described miniaturization index S should be equal to or greater than by equation (10), (12) and (14) decision minimum intermediate calender rolls diameter and, this is a nature.
In addition, such as existing 4 grades of milling trains will be modified into 6 grades of milling trains the time, described miniaturization index S is quite important.In other words, for reducing improvement cost, it is effectively utilizing existing rolling-mill housing.For this reason, the miniaturization index S of existing milling train must be close to the miniaturization index S that is equal to or less than 6 grades of milling trains after the improvement.According to the present invention, it is minimum that the miniaturization index S of 6 grades of milling trains can keep, and quadratic power and biquadratic amount border characteristic can remain on and be close on the level that is parity with or superiority over the characteristic that is obtained by the reinforcement roller diameter of choosing.Therefore, we can say that the present invention is especially desirable to described improvement.
Above stated specification related to useful roller all be the situation that does not have the straight roller of convex surface.In this case, especially under 5-width machine equivalent condition, determine to strengthen the minimum of a value of roller diameter to guarantee that quadratic power amount border is not for negative.For increasing this quadratic power amount border, except adopting roll bender, it is also conceivable that other method.For example, one of method provides a reinforcement roller with approximate quadratic curve convex surface profile, and its central roll is phased down by middle mind-set edge.Can find out obviously that by above-mentioned explanation this method has reduced the quadratic component of benchmark lath convex surface, thereby increase quadratic power amount border, finally further reduce the reinforcement roller.When other roller except strengthening roller adopts described roller convex surface, can obtain identical effect naturally.But when adopting the convex surface roller, it is difficult that the roller polishing operation becomes.In addition, when adopting minor diameter to strengthen roller, the variation that the lath convex surface is produced by the variation of rolling load also increases naturally, has reduced rolling stability in this sense.This also is accompanied by the deterioration in roll neck fatigue strength and bearing service life.Even when adopting the convex surface roller, we can say that the minimum roller diameter of strengthening has it self the limit.
But if reduction of miniaturization index S and improvement cost are reduced, be significant especially as mentioned above, for improvement according to described method or similar approach.In addition, if can reduce every time rolling load by the number that in rolling equipment that is mainly used in rolling most flexible materials and reversible rolling equipment, increases rolling pass, can consider that so the minimum of a value of strengthening roller diameter just can adopt the value that is equal to or less than equation (12).Especially, under the 4-width machine equivalent condition that adopts flexible material and straight roller, based on the quadratic power amount border characteristic curve among Figure 13 and reinforcement roller diameter among Figure 23 and quadratic power amount border characteristic curve, undoubtedly can adopt the reinforcement roller diameter of 900mm, this description from the front is known and is found out.In this case, at any time all might produce a milling train that is positioned at smaller diameter side, as long as maximum available work roller diameter and maximum available intermediate calender rolls diameter are held in place on the straight line B+C and its underpart in Fig. 3, or preferably reaching on its underpart with the wide B ' that adapts of the available lath of maximum+C ', the index S of milling train miniaturization simultaneously remains on the value that is equal to or less than equation (18).This method provides a kind of milling train of more miniaturization.
Figure 38 represents that described milling train is used for the situation of tandem rolling equipment in batches.The workpiece 1 of this milling train is placed on the uncoiler 17 and uncoiling.Then the pinch roll by being positioned at input side 18 it be supplied to mounted milling train M1 to M4, rolling in a continuous manner; Workpiece 1 after the rolling is rolled by coiling machine 20 by the pinch roll 19 that is positioned at outlet side.In this milling train, finish the rolling operation of limited quantity by mounted milling train.Therefore, heavily bundle especially needs.In this situation, heavily rolling by milling train in first stage provides.Usually, the end stage especially in terminal stage, milling train is finished the less regrate that is mainly used in convex surface control.Roll torque that we can say milling train is bigger than the last stage in the first stage.In tandem rolling equipment in batches, when using a new rolling volume, lath inserts in each roller and ceaselessly supplies lath at every turn.Like this when work roll diameter reduce and the lath of input side thick for about 3 to 4mm the time, if rolling the employing once heavier pressure workpiece can not be inserted in the roller.For transmitting this big moment and removing described insertion restriction, should increase work roll diameter.As the result of aforementioned argumentation, in the tandem rolling equipment, especially in rolling equipment in batches, the roller diameter of guaranteeing first stage milling train may be effectively greater than the roller diameter of after-stage milling train, as requiring.Like this, such as under four-width machine equivalent condition, the available work roller diameter scope of first stage milling train M1 to M2 can be thought of as 340 to 375mm among Figure 38, and the available work roller diameter scope of after-stage milling train M3 to M4 can be thought of as 325 to 350mm.If such as adopting this method and the work roll diameter in first stage to be reduced to below the minimum standard 340mm, this roller just can be used in the milling train of after-stage.Like this, can use it up to the minimum roller diameter that reaches the after-stage milling train always.In other words, this is equivalent to the usable range that reality has enlarged work roll diameter, has guaranteed the validity of working roll.And then, the maximum functional roller diameter that makes just stage and end stage and maximum intermediate calender rolls diameter with equate.The intermediate calender rolls diameter that this means the end stage is greater than the intermediate calender rolls diameter in stage just.Like this, even the intermediate calender rolls diameter in end stage has arrived admissible minimum diameter, this roller can be used in the milling train in first stage.Correspondingly this has also guaranteed effective use of intermediate calender rolls.In addition clearly, the increase of end stage intermediate calender rolls diameter means reducing of end stage quadratic power ratio.As mentioned above, this can guarantee the reliable control of end stage milling train to convex surface.Like this, adopt milling train of the present invention to carry out effective miniaturization to the tandem rolling equipment.
Figure 39 represents that milling train of the present invention is used for the situation of contrary cold-rolling equipment.One rolling volume 1 is placed on the uncoiler 21 at first, then is supplied to milling train M1 by pinch roll 22 or analog.Then the workpiece 1 after the milling train M1 rolling is wound on the coiling machine 23 that is installed on output.When the roll-in of workpiece rear portion or roll-in soon were intact, the coiling machine 24 coiling workpiece by being installed on input side carried out the rightabout roll-in simultaneously.Before workpiece on being wound on output coiling machine 23 1 was launched fully in this case, roll-in was ended, and gets started oppositely roll-in next time again.In this contrary rolling plant, as long as allow to reduce the number that output just can increase rolling pass.This makes may design a technical process, and wherein every time rolling load and roll torque can reduce by the increase of passage number.Opposite if described step is possible, as mentioned above, just can be used in the reinforcement roller diameter of smaller diameter side.In other words, maximum available work roller diameter and maximum available intermediate calender rolls diameter and be arranged on the straight line B+C and its underpart of Fig. 3, or preferably reaching on its underpart, and make milling train miniaturization index S be equal to or less than the value of equation (18) with the wide B ' that adapts of the available lath of maximum+C '.Always might provide one to strengthen the milling train that roller is used in smaller diameter side under these conditions.Like this, this method just provides a very small-sized contrary rolling plant.
It all is the situation that does not have the straight roller of convex surface that above stated specification has related to all rollers that adopt.But the present invention can be used on the local convex surface of reduction near in 6 grades of milling trains at removable working roll edge.Near the local convex surface control panel bar edge of described milling train edge descends.On the contrary, be that working roll and intermediate calender rolls bender provide its operation and effect and much at one of the present invention along the wide lath convex surface of workpiece lath.In addition, can be equipped with a local convex surface in the thicker mode of the removable working roll of an end according to 6 grades of milling trains of the present invention near this milling train.So just can control near the hot convex surface in lath edge.Described all milling trains all are used to control the lath convex surface near lath edge.When this local lath convex surface of control, preferably adopt littler work roll diameter.This is because the requirement working roller bending forcing press that reduces of work roll diameter applies a big biquadratic control component, to guarantee the reliable control near the lath edge.Therefore, can know from above stated specification and find out that the present invention has effectively reduced work roll diameter by the appropriate combination of roller diameter.We can say that this method descends for the control edge and hot convex surface is very effective.If this milling train is used as the milling train that described working roll top has a local crown, can further improve lath edge control effect undoubtedly.
In the characteristic curve of present working roller bending forcing press of parenchymalia of the present invention and intermediate calender rolls bender.Therefore, the present invention is not suitable for the milling train that does not have described control device, even it is 6 grades of milling trains.This milling train comprises no intermediate calender rolls bender but the milling train that intersects with intermediate calender rolls.In this milling train, quadratic power amount border characteristic curve is by the traversed by angle decision of intermediate calender rolls, and is irrelevant with the intermediate calender rolls diameter.The maximum characteristic curve that produces when therefore, not having illustrated use working roll of the present invention and intermediate calender rolls diameter combination.But the present invention can be used in the described milling train that working roller bending forcing press and intermediate calender rolls bender are installed.
The invention provides a miniaturization milling train and the rolling equipment that to guarantee suitable lath convex surface control ability.

Claims (13)

1. a milling train comprises:
The upper working rolls and lower working rolls of a pair of rolling workpiece,
The a pair of intermediate calender rolls up and down that supports described working roll respectively,
The a pair of roller of reinforcement up and down that supports described intermediate calender rolls respectively, and
A roller bending device of applying bending force for each described working roll and described intermediate calender rolls;
Described milling train is characterised in that it comprises that also one drives the working roller driving device of described working roll under the following conditions;
Suppose the wide Wmax (mm) of being of maximum functional lath of described workpiece,
The scope of described work roll diameter Dw is
300+50 * (Wmax-1200)/300≤Dw≤375+50 * (Wmax-1200)/300, simultaneously
The scope of described intermediate calender rolls diameter Di is
Dw≤Di≤450+75×(Wmax-1200)/300。
2. milling train according to claim 1 is further characterized in that the scope of described work roll diameter Dw is
300+50×(Wmax-1200)/300≤Dw≤350+50×(Wmax-1200)/300。
3. milling train according to claim 1 is further characterized in that, the scope of described intermediate calender rolls diameter Di is
Dw≤Di≤425+75×(Wmax-1200)/300。
4. milling train according to claim 1 is further characterized in that, the scope of described reinforcement roller diameter Db is
1000+100×(Wmax-1200)/300≤Db≤1300+100×(Wmax-1200)/300。
5. milling train according to claim 1 is further characterized in that, the scope of described reinforcement roller diameter Db is
1000+100×(Wmax-1200)/300≤Db≤1150+100×(Wmax-1200)/300。
6. a milling train comprises:
The upper working rolls and lower working rolls of a pair of rolling workpiece,
The a pair of intermediate calender rolls up and down that supports described working roll respectively,
The a pair of roller of reinforcement up and down that supports described intermediate calender rolls respectively, and
One applies the roller bending device of bending force for each described working roll and described intermediate calender rolls;
Described milling train is characterised in that, comprises that further one drives the working roller driving device of described working roll under the following conditions;
Suppose the wide Wmax (mm) of being of maximum functional lath of described workpiece,
Described work roll diameter Dw and described intermediate calender rolls diameter Di's and scope be
650+100×(Wmax-1200)/300≤Dw+Di≤825+125×(Wmax-1200)/300。
7. milling train according to claim 6 is further characterized in that, described work roll diameter Dw and described intermediate calender rolls diameter Di's and scope be
675+100×(Wmax-1200)/300≤Dw+Di≤800+125×(Wmax-1200)/300。
8. a milling train comprises:
The upper working rolls and lower working rolls of a pair of rolling workpiece,
The a pair of intermediate calender rolls up and down that supports described working roll respectively,
The a pair of roller of reinforcement up and down that supports described intermediate calender rolls respectively, and
One moves the mobile device of described intermediate calender rolls at axial direction,
One applies the roller bending device of bending force for each described working roll and described intermediate calender rolls;
Described milling train is characterised in that, comprises that also one drives the working roller driving device of described working roll under the following conditions;
Suppose the wide Wmax (mm) of being of maximum functional lath of described workpiece,
Described work roll diameter Dw, described intermediate calender rolls diameter Di and described reinforcement roller diameter Db's and scope be
Dw+Di+Db≤1925+225×(Wmax-1200)/300。
9. cold-rolling mill, it comprises:
The upper working rolls and lower working rolls of a pair of rolling workpiece,
The a pair of intermediate calender rolls up and down that supports described working roll respectively,
The a pair of roller of reinforcement up and down that supports described intermediate calender rolls respectively, and
One moves the mobile device of described intermediate calender rolls at axial direction,
One applies the roller bending device of bending force for each described working roll and described intermediate calender rolls;
Described milling train is characterised in that it comprises that also one drives the working roller driving device of described working roll under the following conditions;
Suppose the wide Wmax (mm) of being of maximum functional lath of described workpiece,
The scope of described work roll diameter Dw is
300+50×(Wmax-1200)/300≤Dw，
The scope of described intermediate calender rolls diameter Di is Dw≤Di, simultaneously
Described work roll diameter Dw, described intermediate calender rolls diameter Di and described reinforcement roller diameter Db's and scope be
Dw+Di+Db≤1925+225×(Wmax-1200)/300。
10. a tandem mill, it comprises at least one milling train, this milling train further comprises:
The upper working rolls and lower working rolls of a pair of rolling workpiece,
The a pair of intermediate calender rolls up and down that supports described working roll respectively,
The a pair of roller of reinforcement up and down that supports described intermediate calender rolls respectively, and
One applies the roller bending device of bending force for each described working roll and described intermediate calender rolls;
Described milling train is characterised in that, comprises that also one drives the working roller driving device of described working roll under the following conditions;
Suppose the wide Wmax (mm) of being of maximum functional lath of described workpiece,
The scope of described work roll diameter Dw is
300+50 * (Wmax-1200)/300≤Dw≤375+50 * (Wmax-1200)/300, simultaneously
The scope of described intermediate calender rolls diameter Di is
Dw≤Di≤450+75×(Wmax-1200)/300。
11. a contrary rolling plant, it comprises:
The upper working rolls and lower working rolls of a pair of rolling workpiece,
The a pair of intermediate calender rolls up and down that supports described working roll respectively,
The a pair of roller of reinforcement up and down that supports described intermediate calender rolls respectively, and
One applies the roller bending device of bending force for each described working roll and described intermediate calender rolls;
Described contrary rolling plant is characterised in that, also comprises the working roller driving device of the described working roll of reverse drive under the following conditions;
Suppose the wide Wmax (mm) of being of maximum functional lath of described workpiece,
The scope of described work roll diameter Dw is
300+50 * (Wmax-1200)/300≤Dw≤375+50 * (Wmax-1200)/300, simultaneously
The scope of described intermediate calender rolls diameter Di is
Dw≤Di≤450+75×(Wmax-1200)/300。
12. the milling method of a milling train, this milling train comprises:
The upper working rolls and lower working rolls of a pair of rolling workpiece,
The a pair of intermediate calender rolls up and down that supports described working roll respectively, and
The a pair of roller of reinforcement up and down that supports described intermediate calender rolls respectively;
Described milling method is further characterized in that, comprises the step that drives described working roll and applies bending force to control the step of described workpiece lath convex surface under the following conditions each described working roll and described intermediate calender rolls;
Suppose the wide Wmax (mm) of being of maximum functional lath of described workpiece,
The scope of described work roll diameter Dw is 300+50 * (Wmax-1200)/300≤Dw≤375+50 * (Wmax-1200)/300, and the scope of described intermediate calender rolls diameter Di is Dw≤Di≤450+75 * (Wmax-1200)/300 simultaneously.
13. a level Four milling train that will have a frame is improved to the method for six grades of milling trains, this method comprises:
Described level Four rolling-mill housing is used in step in described six grades of milling trains,
Obtain to be used for the step of the index of each milling train miniaturization based on the lath convex surface control characteristic curve of workpiece, and
Be modified into the step of six grades of milling trains, the miniaturization index that it has does not exceed the index that is used for the described level Four milling train of miniaturization.
CNB021218765A 2001-07-11 2002-02-28 Rolling mill, rolling equipment and rolling method Expired - Lifetime CN100448558C (en)

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