CN105618487B - It is a kind of to press finish rolling backing roll roll contour design method - Google Patents
It is a kind of to press finish rolling backing roll roll contour design method Download PDFInfo
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- CN105618487B CN105618487B CN201610056939.9A CN201610056939A CN105618487B CN 105618487 B CN105618487 B CN 105618487B CN 201610056939 A CN201610056939 A CN 201610056939A CN 105618487 B CN105618487 B CN 105618487B
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- Prior art keywords
- roll
- curve
- finish rolling
- backing roll
- rolling backing
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Classifications
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- 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
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
- B21H8/02—Rolls of special shape
Abstract
It is specifically a kind of pressure finish rolling backing roll roll contour design method the present invention relates to roll contour design field.Shape of working roll curve is calculated with existing formula, intercept the curve between working roll CVC curves first high point from left to right and first low spot, left X1 is carried out to the curved section, determine the roller end origin of curve of side, right translation X2 is carried out to the curved section, find and now find right translation and the intersection point of left curve, determine the starting point of opposite side roller end curve, coefficient is multiplied by the curve numerical value between two points, both sides roller end curve is designed according to parametric equation, numerical simulation is carried out to the roller end curve of design, the even wearing of finish rolling backing roll after improvement, the roll change cycle extended to 24 days by 15 days, 2 yuan/ton of roller consumption reduction.
Description
Technical field
It is specifically a kind of pressure finish rolling backing roll roll contour design method the present invention relates to roll contour design field.
Background technology
The working roll of the frame tandem mill group of 2250 production line finish rolling of Taiyuan Iron and Steel Co. hot continuous rolling factory 7 is all using CVC roller shapes, such as Fig. 1
Shown, the configuration can realize that roller shape convexity continuous variable is adjusted, and reduce roll specification and roll change number of times, improve production effect
Rate.While CVC shape of working roll plays its advantage, backing roll is also set to occur in that uneven abrasion.Not only shorten supporting
In the roll change cycle of roller, production efficiency is reduced, and add the loss of support roller in itself, reduced backing roll and use the later stage
The dimensional accuracy of rolling stability, the strip shape quality of strip and strip.Theoretical, uneven abrasion reflection is formed according to abrasion
During belt steel rolling, the inhomogeneities of contact between backing roll and working roll, that is, the position contact for wearing and tearing big
It is larger.Applied finite element simulation software for calculation, when calculating the roller shape that backing roll provides for western mark, between backing roll and working roll
Contact distribution it is as shown in Figure 2, it is seen that serious unbalanced stress phenomenon is implicitly present between backing roll and working roll.
The content of the invention
The technical problems to be solved by the invention are：How backing roll uniform wear in use is realized.
The technical solution adopted in the present invention is：It is a kind of to press finish rolling backing roll roll contour design method, according to following side
Method is carried out：
Step 1: using working roll barrel length as abscissa, roller shape size is ordinate, work roll axis left end starting point is
Central point sets up CVC coordinate systems, and the CVC curvilinear equations for calculating the existing working roll of acquisition are：Y=a3x3+a2x2+a1x+a0, cut
Take the curve between the CVC curves of working roll first high point from left to right and first low spot, α1, α2, α3, a0For constant, x
For the corresponding abscissa of working roll barrel length, y is the corresponding ordinate of shape of working roll size, and roller shape size is the relative of roller
Highly, i.e. roller shape convexity；
Step 2: the CVC curves of the working roll intercepted to step one are translated along abscissa, left is carried out first,
Then the corresponding abscissa of curve left end point after left is carried out right flat as the terminal of the left chamfering of pressure finish rolling backing roll
Move, the curve abscissa corresponding with the intersection point of the curve after left after right translation is used as the right chamfering for pressing finish rolling backing roll
Starting point；
Step 3: with the left end of the curve after the left end point of the curve after left in straight line Connection Step two and right translation
Point, intercepts in this section of straight line and step 2 the curve between right translation curve is from left end point to intersection point, keeps abscissa constant, indulges and sits
Mark is uniformly multiplied by adjustment factor α, obtains the CVC curves between the left and right chamfering of pressure finish rolling backing roll, 0 ＜ α≤1；
Step 4: the left reciprocal curve CVC curvilinear equations of pressure finish rolling backing roll are： Pressure finish rolling backing roll right reciprocal curve CVC curvilinear equations be In formula, ho1、ho2、h03Both greater than it is equal to 0, and ho1+ho2+h03=Ho, ho1、ho2、
h03For the three parameter value values empirically taken, hD1、hD2、hD3Both greater than it is equal to 0, and hD1+hD2+hD3=HD, hD1、hD2、hD3
For three parameter values empirically taken, ho1：ho2：h03=hD1：hD2：hD3, HoFor left chamfer height, LoLeft chamfering length, HD
Right chamfer height, LDFor right chamfering length, β, γ, ω are respectively that power exponent is experience numerical constant, and x ' is pressure finish rolling backing roll
Corresponding coordinate, H in barrel lengthO(x ') is the corresponding roller shape size of left chamfering, HD(x ') is that the corresponding roller shape of right chamfering is big
Small, the left reciprocal curve CVC curves of pressure finish rolling backing roll are translated along ordinate makes the left chamfering of pressure finish rolling backing roll bent
The right endpoint of line CVC curves is equal with the left end point ordinate of the curve after left in step 3, obtains the pressure revised
The left reciprocal curve CVC curves of finish rolling backing roll, the right reciprocal curve CVC curves of pressure finish rolling backing roll are translated along ordinate
Make the left end point of the right reciprocal curve CVC curves of pressure finish rolling backing roll equal with the ordinate of intersection point in step 3, repaiied
That ordered presses the right reciprocal curve CVC curves of finish rolling backing roll；
Step 5: utilization index exponential smoothing by pressure finish rolling backing roll left and right chamfering between CVC curves, revised it is equal
The right reciprocal curve CVC curves for the pressure finish rolling backing roll for press the left reciprocal curve CVC curves of finish rolling backing roll, revising are spelled
Connect, obtain complete pressure finish rolling backing roll roll shape curve CVC curves, utilize complete pressure finish rolling backing roll roll shape curve
CVC Curve Machinings go out pressure finish rolling backing roll.
It is used as a kind of preferred embodiment：In step 2, the translational movement of left and the translational movement of right translation have with roll shifting position
Close, count the roll shifting position for pressing the frame where finish rolling backing roll, frequency and roll shifting location map are set up, in distribution map
In take total statistic 85%-90% roll shiftings corresponding roll shifting position left end and right-hand member respectively correspond to left translation
Amount and the translational movement of right translation.
The beneficial effects of the invention are as follows：The even wearing of finish rolling backing roll after improvement, the roll change cycle extended to 24 by 15 days
My god, 2 yuan/ton of roller consumption reduction.As-rolled condition is more stable after improvement, and whipping number of times is reduced.The near side (ns) of wide specification thin plate material after improvement
Wave is obviously reduced.
Brief description of the drawings
Fig. 1 is working roll CVC roller shape figures；
Fig. 2 is not using the contact distribution map between front support roller of the present invention and working roll；
Fig. 3 is that the present invention presses finish rolling backing roll CVC roller shape figures；
Fig. 4 is using the contact distribution map between rear support roller of the present invention and working roll；
Fig. 5 is that the present invention presses finish rolling backing roll roller shape parameter distribution map；
Fig. 6 is roll shifting position statistical Butut；
Fig. 7 is the schematic diagram for translating and determining roller end endpoint curve.
Embodiment
Step 1: calculating shape of working roll curve with existing formula
Work on hand roller roll shape curve equation is：
Y=a3x3+a2x2+a1x+a0
a3=2.11477795637024E-10
a2=-8.0065114052187E-07
a1=7.99279353009544E-04
a0=0
Shape of working roll curve then can be drawn as shown in figure 1, x is the corresponding abscissa of working roll barrel length, y is work
The corresponding ordinate of roller roller shape size, roller shape size is the relative altitude of roller, i.e. roller shape convexity, work on hand roller roll shape curve side
Journey is provided by working roll producer or gone out by real work roller survey calculation.
Step 2: " high point " and " low spot " half interval contour on interception working roll CVC curves, left X-, left end are carried out to it
Point carries out right translation X+ to it, and find out left as the abscissa of the terminal of reciprocal curve on the left of pressure finish rolling backing roll
With right translation in the intersection point on right side, the starting point abscissa of pressure finish rolling backing roll left side reciprocal curve is used as using the intersection point.
X+ and X- determines according to the roll shifting position statistical Butut of frame where finish rolling backing roll, as shown in fig. 6, from Fig. 6
It can be seen that accounting for more than the 85% of total statistic between roll shifting position -40 to+100, you can determine X+=100mm, X-=
40mm.Translate and determine that the schematic diagram of roller end endpoint curve is as shown in Figure 7.
Step 3: the equal hydraulic support roller curve in Fig. 7 between left left end point and right translation left end point is straight with point-to-point transmission
Line represents that the equal hydraulic support roller curve between right translation left end point and intersection point is represented with right translation curve.And to this two sections of curves
Zoomed in and out with adjustment factor α (0 ＜ α≤1).By taking α=0.8 as an example, the equal hydraulic support roller curve of interlude in Fig. 7 is obtained, i.e.,
The CVC curves between the left and right chamfering of pressure finish rolling backing roll are obtained, press the CVC curves between the left and right chamfering of finish rolling backing roll to rise
The ordinate 0.191835067mm abscissas of point are 645mm, press the CVC End of Curves between the left and right chamfering of finish rolling backing roll
Ordinate 0.063454258mm abscissas be 1865.
Step 4: as shown in figure 5, working roll barrel length is 2550, equal hydraulic support roller barrel length is 2250, working roll
Midpoint with the equal hydraulic support roller body of roll is on same vertical curve, and the position on the left of equal hydraulic support roller backing roll with right side roller end is distinguished
Corresponding to the 150mm and 2400mm of working roll.So equal hydraulic support roller backing roll left side and right side roller end length of a curve LO=
645-150=495mm, i.e., left chamfering length, LD=2400-1865=535mm, i.e., right chamfering length.
Left chamfer height HoWith right chamfer height HDExperience span (unit mm) be respectively (0,1.5] and (0,
2.0], with Ho=0.8mm, HDExemplified by=1.5mm, wherein ho1：ho2：h03=hD1：hD2：hD3It is 1 to learn from else's experience and test proportionate relationship:3:1,
β, γ, ω take empirical value 3,4 and 6 respectively, then have specific roller end curve parametric equation as follows：
Pressure finish rolling backing roll left reciprocal curve CVC curvilinear equations be
Pressure finish rolling backing roll right reciprocal curve CVC curvilinear equations be
Then 0.191835067mm is translated along ordinate direction to left reciprocal curve, a left side for pressure finish rolling backing roll is fallen
The right endpoint of angular curve CVC curves is equal with the left end point ordinate of the curve after left in step 3, right reciprocal curve edge
Ordinate direction translates 0.063454258mm, presses the left end point and step 3 of the right reciprocal curve CVC curves of finish rolling backing roll
The ordinate of middle intersection point is equal.
Step 5: as shown in figure 3, simultaneously utilization index smoothing method, left reciprocal curve and the right side after step 4 is translated fall
Complete pressure finish rolling backing roll is can obtain on the CVC curves that angular curve is spliced between the left and right chamfering of pressure finish rolling backing roll
Roll shape curve CVC curves, pressure finish rolling backing roll is gone out using complete pressure finish rolling backing roll roll shape curve CVC Curve Machinings,
Contact between pressure its backing roll of finish rolling backing roll and working roll for being processed using the inventive method is distributed such as Fig. 4 institutes
Show.
Claims (2)
1. a kind of press finish rolling backing roll roll contour design method, it is characterised in that carries out as follows：
Step 1: using working roll barrel length as abscissa, centered on roller shape size is ordinate, work roll axis left end starting point
Point sets up CVC coordinate systems, and the CVC curvilinear equations for calculating the existing working roll of acquisition are：Y=a3x3+a2x2+a1x+a0, intercept work
Make the curve between the CVC curves of roller first high point from left to right and first low spot, α1, α2, α3, a0For constant, x is work
Make the corresponding abscissa of roller barrel length, y is the corresponding ordinate of shape of working roll size, and roller shape size is the relatively high of roller
Degree, i.e. roller shape convexity；
Step 2: the CVC curves of the working roll intercepted to step one are translated along abscissa, left, Zuo Ping are carried out first
Then the corresponding abscissa of curve left end point after shifting carries out right translation as the terminal of the left chamfering of pressure finish rolling backing roll,
Curve abscissa corresponding with the intersection point of the curve after left after right translation is used as the right chamfering of pressure finish rolling backing roll
Starting point；
Step 3: with the left end point of the curve after the left end point of the curve after left in straight line Connection Step two and right translation,
The curve between right translation curve is from left end point to intersection point is intercepted in this section of straight line and step 2, keeps abscissa constant, ordinate
Adjustment factor α is uniformly multiplied by, the CVC curves between the left and right chamfering of pressure finish rolling backing roll, 0 ＜ α≤1 is obtained；
Step 4: the left reciprocal curve CVC curvilinear equations of pressure finish rolling backing roll are： Pressure finish rolling backing roll right reciprocal curve CVC curvilinear equations be In formula, ho1、ho2、h03Both greater than it is equal to 0, and ho1+ho2+h03=Ho, ho1、ho2、
h03For three parameter values empirically taken, hD1、hD2、hD3Both greater than it is equal to 0, and hD1+hD2+hD3=HD, hD1、hD2、hD3For
Three parameter values empirically taken, ho1：ho2：h03=hD1：hD2：hD3, HoFor left chamfer height, LoLeft chamfering length, HDIt is right
Chamfer height, LDFor right chamfering length, β, γ, ω are respectively that power exponent is experience numerical constant, and x ' is pressure finish rolling backing roll roller
Corresponding coordinate, H in body lengthO(x ') is the corresponding roller shape size of left chamfering, HD(x ') is the corresponding roller shape size of right chamfering,
The left reciprocal curve CVC curves of pressure finish rolling backing roll are translated to the left reciprocal curve for making to press finish rolling backing roll along ordinate
The right endpoint of CVC curves is equal with the left end point ordinate of the curve after left in step 3, obtains the pressure essence revised
The left reciprocal curve CVC curves of backing roll are rolled, the right reciprocal curve CVC curves of pressure finish rolling backing roll are made along ordinate translation
The left end point of the right reciprocal curve CVC curves of pressure finish rolling backing roll is equal with the ordinate of intersection point in step 3, is revised
That crosses presses the right reciprocal curve CVC curves of finish rolling backing roll；
Step 5: utilization index exponential smoothing is smart by the CVC curves between the left and right chamfering of pressure finish rolling backing roll, the pressure revised
The right reciprocal curve CVC curve matchings for pressing finish rolling backing roll for roll the left reciprocal curve CVC curves of backing roll, revising, are obtained
To complete pressure finish rolling backing roll roll shape curve CVC curves, complete pressure finish rolling backing roll roll shape curve CVC curves are utilized
Process pressure finish rolling backing roll.
2. a kind of pressure finish rolling backing roll roll contour design method according to claim 1, it is characterised in that：In step 2,
The translational movement of left and the translational movement of right translation are relevant with roll shifting position, count this and press frame where finish rolling backing roll
Roll shifting position, sets up frequency and roll shifting location map, is taken in distribution map corresponding to the 85%-90% roll shiftings of total statistic
Roll shifting position left end and right-hand member respectively correspond to left translational movement and right translation translational movement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610056939.9A CN105618487B (en) | 2016-01-27 | 2016-01-27 | It is a kind of to press finish rolling backing roll roll contour design method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610056939.9A CN105618487B (en) | 2016-01-27 | 2016-01-27 | It is a kind of to press finish rolling backing roll roll contour design method |
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| CN105618487B true CN105618487B (en) | 2017-07-25 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1840253A (en) * | 2005-03-28 | 2006-10-04 | 宝山钢铁股份有限公司 | Support roller matched with working roller curve of continuous variable convex rolling mill |
| CN101758080A (en) * | 2010-01-12 | 2010-06-30 | 北京科技大学 | Strip-rolling variable contact support roller and processing method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004020132A1 (en) * | 2003-12-23 | 2005-07-28 | Sms Demag Ag | Method for rolling of sheets or strips in a roll stand including working rolls,intermediate rolls, and backing rolls useful for rolling sheets or strips in roll stands using working rolls supported on backing or intermediate rolls |
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2016
- 2016-01-27 CN CN201610056939.9A patent/CN105618487B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1840253A (en) * | 2005-03-28 | 2006-10-04 | 宝山钢铁股份有限公司 | Support roller matched with working roller curve of continuous variable convex rolling mill |
| CN101758080A (en) * | 2010-01-12 | 2010-06-30 | 北京科技大学 | Strip-rolling variable contact support roller and processing method thereof |
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