CN109967529A - Improve the shape of working roll design method that strip in razor-thin rolls the tight rib wave flatness defect in back - Google Patents
Improve the shape of working roll design method that strip in razor-thin rolls the tight rib wave flatness defect in back Download PDFInfo
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- CN109967529A CN109967529A CN201910352786.6A CN201910352786A CN109967529A CN 109967529 A CN109967529 A CN 109967529A CN 201910352786 A CN201910352786 A CN 201910352786A CN 109967529 A CN109967529 A CN 109967529A
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- 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
- B21B1/40—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 foils which present special problems, e.g. because of thinness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/021—Rolls for sheets or strips
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- 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
- B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending
Abstract
The present invention provides a kind of shape of working roll design method for improving strip in razor-thin and rolling the tight rib wave flatness defect in back, belongs to strip calendering technical field.It is for statistical analysis that this method rolls back plate shape situation to volume 20 or more of strip in razor-thin first, obtain rolling the characteristic distributions of the tight rib wave flatness defect of rear very thin band edge, then operation roll of mill barrel length and strip in razor-thin throat width clearly in production, with the new roller shape protrusion zone position of determination；The finally service condition of clear working roll ground conth designs roll shape curve in the middle part of new roller shape according to working roll ground conth.Each section of parameter of curve of the roller shape mainly according to operation roll of mill barrel length, strip in razor-thin throat width, roll rear very thin band plate shape situation and initialization roller roller shape and determine.This method can be effectively improved the tight rib wave flatness defect in the side occurred after strip in razor-thin rolls, reduce resulting waste material, improve strip in razor-thin and roll lumber recovery.
Description
Technical field
The present invention relates to strips to roll technical field, particularly relates to a kind of improvement strip in razor-thin and rolls the tight rib wave flatness defect in back
Shape of working roll design method.
Background technique
With the rise of product lightweight and micromation, the industries such as electronics, medical treatment, the energy, traffic are to high-test metal pole
There is urgent need in strip, also higher and higher to the plate shape required precision of strip in razor-thin finished product.Research object of the invention is to be used for
The electric aluminum foil strip in razor-thin product for manufacturing various capacitors, as a kind of functional material, except to finished product texture and thick difference have compared with
Outside high request, also have high requirements to the precision of plate shape.Certain factory's electric aluminum foil strip finished product thickness is 0.08mm~0.12mm,
Factory's foil mill Automatic Flatness Control system includes roller declination, the positive and negative roller of working roll, roll chilling spray and roll thermal jet
The control means such as leaching.Found in actual production, various Strip Shape Control means in use, aluminum foil finished product strip there are still apparent
The tight rib wave flatness defect in side, the tight rib wave flatness defect in the side are easy to cause subsequent straightening process to generate disconnected band, increase amount of waste.Cause
This, improves the tight rib wave flatness defect in strip side, has important meaning to the smooth development and reduction amount of waste of aluminium foil products subsequent handling
Justice.
In the operation of rolling, rolling heat a part that material deformation and friction generate is taken away by made-up belt and rolling cooling oil, greatly
Part then passes to upper and lower working roll, increases work roll temperature.Since the barrel length of working roll is wider than rolled made-up belt
Degree is big, forms contact zone and non-material area along body of roll direction.In non-material area, working roll has no way of obtaining rolling deformation heat and frictional heat,
High-speed rotating working roll bring air takes away a large amount of heat further through convection current.And in the middle part of working roll and made-up belt rolling contact area
Then there is incoming heat in domain.After rolling after a period of time, the roll surface temperature of working roll central area can be significantly hotter than two sides
Roll surface temperature, cause roll Axial Thermal Crown uneven.Working roll is low in two sides strip edge area temperature, and radial thermal expansion is small,
Actually having for this region is caused to carry roll gap increasing, aluminum foil plate band border region cannot be depressed effectively, cause to roll rear band herein
Region " relatively thick ", thus strip edge generate the tight region in side, the tight area of strip side generally apart from strip side portion 10mm~
The range of 20mm width.The presence of rolling middle outlet tension makes the tight area's flexible deformation of strip side, and foil rolls strip in milling train at this time
Outlet is without obvious plate shape problem.After the completion of rolling, manually strip is unfolded, the area Bian Jin is formed adjacent area a kind of " outer at this time
Hold tensile stress ", it causes the adjacent area band in pressured state, generates apparent visible " side is tight " and " rib wave " flatness defect.
The tight area's excision of rear very thin band edge will be rolled, rib wave flatness defect disappears therewith.
Although there are some research achievements in aluminium foil strip shape problem at present, it is concentrated mainly on to roll crown and rolls
The research that technique processed influences plate shape.Such as document 1 (finite element analysis that shape of working roll influences aluminum foil plate shape, engineering science
Journal, the 2005, the 1st phase) using Finite-Element Study different operating roller roller shape under chilling roller and hot-rolling state mill roll-gap shape,
The distribution of draught pressure axial direction and aluminium foil convexity of top working roll at aluminium foil mill roll gap, and back plate shape situation is rolled to judge with this.
Document 2 (Strip Shape Control in aluminum foil rolling, light-alloy processing technology, the 2007, the 4th phase) think roll crown and its roughness,
The setting of the cooling technique of roller heat convex degree learning, Automatic Flatness Control and target flatness curve all generates important shadow to aluminum foil plate shape
It rings.Document 3 (optimization of quadruple aluminium foil mill shape of working roll curve, the 2013, the 7th phase) is in order to improve working roll corresponding region etc.
Imitate convexity it is excessive caused by two rib wave plate shape problems, working roll curve when to using different convexitys, different half-angle carried out pair
Than, the results showed that two rib wave plate shape problems can be made to be resolved by improving working roll curve half-angle angle.However, above method
It is perhaps effective for the conventional typical shape wave generated in foil production process, for the extremely narrow region " side is tight " of edge and its caused
" rib wave " plate shape problem cannot then play good improvement.Currently, being rolled for foil " side is tight " and its caused after strip is rolled
" rib wave " there are no relevant research and good solutions for flatness defect.
Summary of the invention
The technical problem to be solved in the present invention is to provide the work that a kind of improvement strip in razor-thin rolls the tight rib wave flatness defect in back
Roller roll contour design method, it is uneven for making up working roll Axial Thermal Crown in the operation of rolling, increase strip edge drafts, thus
Improve the flatness defect of the tight rib wave of very thin band edge.
It is as follows that the method comprising the steps of:
(1) to roll back plate shape situation to volume 20 or more of strip in razor-thin for statistical analysis, according to rolling rear edge rib wave very thin
The tight sector width of length and strip in razor-thin edge side in bandwidth direction determines that roller shape convex transitional sector width m and roller shape protrusion are adjusted
Sector width n；
(2) operation roll of mill barrel length 2L and strip in razor-thin throat width 2B clearly in production, determines new roller shape convex area
Position L-B and L+B；Strip cross-sectional profiles after being rolled using the method measurement strip in razor-thin of weighing thickness measuring in the width direction, are calculated
The tight region in strip edge side is obtained with respect to convexity, determines that new roller shape protrusion regulatory region adjusts system according to the variable quantity of opposite convex value
Number r；The parameters such as working roll ground conth convexity c and half angle value α of sine are specified, according to the new roller of working roll ground conth parameter designing
Roll shape curve in the middle part of shape keeps roll shape curve in the middle part of new roller shape consistent with working roll ground conth curve；
(3) according to roller shape characterizing definition x1、x2、x3、x4、x5、x6Main points point, seven sections points of new shape of working roll curve point
It does not indicate, formula is as follows:
1) first segment is roller shape convex area, is conic section, formula are as follows:
a1x2+b1x,x≤x1
2) second segment is roller shape protrusion regulatory region, is a curve, formula are as follows:
a2x+b2,x1≤x≤x2
3) third section is Gun Xing convex transitional area, is conic section, formula are as follows:
a3x2+b3x+c3,x2≤x≤x3
4) the 4th section is roller shape sine area, consistent with ground conth curve, is sine curve, formula are as follows:
c/(1-cosα)*(cos(αx/L-α)-cosα),x3≤x≤x4
5) the 5th section of, formula symmetrical with third section opposing work roller body of roll middle line are as follows:
a3(x-2L-b3/a3)2+b3(x-2L-b3/a3)+c3,x4≤x≤x5
6) the 6th section of, formula symmetrical with second segment opposing work roller body of roll middle line are as follows:
a2(2L-x)+b2,x5≤x≤x6
7) the 7th section of, formula symmetrical with first segment opposing work roller body of roll middle line are as follows:
a1(x-2L-b1/a1)2+b1(x-2L-b1/a1),x≥x6
In above formula, c is ground conth curve convex value, mm；α is sinusoidal half angle value of ground conth curve, rad；a1And b1Point
It Wei not roller shape convex area (first segment and the 7th section) roll shape curve two-term coefficient and Monomial coefficient；a2And b2Respectively roller shape
Raised regulatory region (second segment and the 6th section) roll shape curve Monomial coefficient and constant term coefficient；a3, b3And c3Respectively roller shape is convex
Play transition region (third section and the 5th section) roll shape curve two-term coefficient, Monomial coefficient and constant term coefficient；x1=L-B, x2=
L-B+n, x3=L-B+m, x4=L+B-m, x5=L+B-n, x6=L+B, L are the half of working roll barrel length, and B is strip in razor-thin
The half of entrance plate width, n are that roller shape protrusion adjusts sector width, and m is roller shape convex transitional sector width, and L, B, m, n unit are equal
For mm；
(4) according to live grinding machine service condition, new shape of working roll curve discrete data input grinding machine is ground, i.e.,
Obtain the working roll of new roll shape curve.
Wherein, step (1) central roll shape convex transitional sector width m determines method are as follows: cuts off plate along strip in razor-thin length direction
After band edge one fixed width, rib wave disappears, and counts rib wave in the length value of strip in razor-thin width direction, as m；
Roller shape protrusion adjusts sector width n and determines method are as follows: along strip in razor-thin length direction cutter by edge one fixed width
Regional resection, until rib wave flatness defect disappear, statistics at this time strip in razor-thin be removed region width, as n.
M value is bigger, and convex transitional area (third section and the 5th section) is wider in body of roll direction, more to the pressure of strip flank,
To avoid strip rib wave, m value is not preferably greater than local ribs wave in the length of strip in razor-thin width direction.N is the adjusting of roller shape protrusion
Sector width, to guarantee that the entire area Bian Jin is effectively depressed, according to the tight statistical conditions in side, n value selects the tight width value in maximum side.
New roller shape convex area is determined according to operation roll of mill barrel length 2L and strip in razor-thin throat width 2B in step (2),
When any one of barrel length and plate width change, corresponding new shape of working roll curve local crowning position L-B and L+B
It will change；Using sampler along the rectangle batten for rolling rear strip in razor-thin width direction and cutting specific dimensions, pass through weighing thickness measuring
Mode measures strip along the cross-sectional profiles of width direction, according to the area strip edge Bian Jin with respect to convexity situation of change, setting
The adjustment factor r of new roller shape protrusion regulatory region；Meanwhile the stability to guarantee the operation of rolling, new roller shape middle part (the 4th section) roller
Shape curve is consistent with working roll ground conth curve.Strip in razor-thin thickness equations when weighing thickness measuring are as follows:
Wherein, h is batten thickness, mm；M is batten quality, g；ρ is batten density, g/mm3；L is batten length, mm；w
For batten width, mm；
Strip in razor-thin convexity and opposite convexity calculation formula are as follows:
Wherein, CxFor the convex value at strip edge x mm, mm；ρxFor the opposite convex value of strip corresponding position；hc
For strip center thickness value, mm；hoxAnd hdxThe respectively thickness of strip fore side and transmission side at strip edge x mm
Value, mm.
Work as ρBefore x rolls≥ρAfter x rollsWhen, it should reduce and roll the tight area's thickness h in rear two sidesoxAnd hdxValue.The area Bian Jin thickness is set to reduce
Δ h and the adjustment factor r numerically equal of roller shape protrusion regulatory region are measured, (selection of thickness reduction Δ h) should be protected adjustment factor r
Demonstrate,prove ρBefore x rolls< ρAfter x rolls, to achieve the purpose that increase the area strip Bian Jin drafts in rolling.
In step (3), the new roll shape curve of working roll includes roller shape convex area, roller shape protrusion regulatory region, the adjusting of roller shape protrusion
The rollers shape features such as area's adjustment factor, Gun Xing convex transitional area and roller shape sine area, can not be true using the fitting of single mathematical expression formula
Fixed, needing basis to carry out segmentation with upper roller shape feature indicates；Wherein, the roller shape of roller shape protrusion regulatory region (second segment and the 6th section)
Curve is a curve, and the length in body of roll direction is that roller shape protrusion adjusts sector width n, this section of roll shape curve slope is a2, this
Shape of working roll value variable quantity is the adjustment factor r of roller shape protrusion regulatory region in region, there is a at this time2=r/n；To avoid work
Making the mutation of roller roller shape leads to the stress concentration phenomenon of contact pressure between rolls, should ensure that each section of roll shape curve is smoothed in tie point
It crosses, it is identical with roll shape curve slope value that this requires the roll shape curve values at tie point；It can according to the continuous transition condition of curve
Acquire the coefficient a to be asked of each sectional curve1、a3、b1、b2、b3、c3, finally obtain the expression formula of the new roll shape curve of working roll.
This method is suitable for solving the case where rib wave flatness defect tight there are side when strip in razor-thin rolling, and the strip in razor-thin includes
Steel, aluminium, copper.
The advantageous effects of the above technical solutions of the present invention are as follows:
In above scheme, by designing new shape of working roll curve, strip in razor-thin edge drafts, improvement office can be increased
Roller shape input grinding machine is ground according to live grinding machine situation by portion's rib wave flatness defect, roll contour design after the completion.This hair
Bright to can be very good to increase strip in razor-thin edge drafts in the case where not increasing any equipment, feasibility is strong, at low cost,
Certain factory's aluminium foil mill shows to redesign Work Roll Crown using this method after using on the machine, and can increase pole
Strip edge drafts improves the tight rib wave plate shape problem in side present in strip in razor-thin rolling.
Detailed description of the invention
Fig. 1 is that foil rolls working roll Axial Thermal Crown distribution map；
Fig. 2 is that foil rolls into product flatness defect figure, wherein (a) is to roll rear aluminium foil plate band wave-shape situation, (b) tight for excision side
Aluminium foil plate band wave-shape situation behind area；
Fig. 3 is that foil rolls initialization roller roll shape curve figure；
Fig. 4 is that foil rolls the determining figure of new shape of working roll curve segmentation；
Fig. 5 is new shape of working roll curve and ground conth curve comparison figure.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The present invention provides a kind of shape of working roll design method for improving strip in razor-thin and rolling the tight rib wave flatness defect in back.
In the existing operation of rolling, after rolling after a period of time, the roll surface temperature of working roll central area can be obvious high
Roll surface temperature in two sides causes roll Axial Thermal Crown uneven, as shown in Figure 1.After the completion of rolling, manually strip is unfolded,
The area Bian Jin forms a kind of " outer end tensile stress " to adjacent area at this time, causes the adjacent area band in pressured state, generates table
See visible " side is tight " and " rib wave " flatness defect.The tight area's excision of rear very thin band edge will be rolled, rib wave flatness defect disappears therewith, such as
Shown in Fig. 2.
It is as follows that the method comprising the steps of:
(1) to roll back plate shape situation to volume 20 or more of strip in razor-thin for statistical analysis, according to rolling rear edge rib wave very thin
The tight sector width of length and strip in razor-thin edge side in bandwidth direction determines that roller shape convex transitional sector width m and roller shape protrusion are adjusted
Sector width n；
(2) operation roll of mill barrel length 2L and strip in razor-thin throat width 2B clearly in production, determines new roller shape convex area
Position L-B and L+B；Strip cross-sectional profiles after being rolled using the method measurement strip in razor-thin of weighing thickness measuring in the width direction, are calculated
The tight region in strip edge side is obtained with respect to convexity, determines that new roller shape protrusion regulatory region adjusts system according to the variable quantity of opposite convex value
Number r；The parameters such as working roll ground conth convexity c and half angle value α of sine are specified, according to the new roller of working roll ground conth parameter designing
Roll shape curve in the middle part of shape keeps roll shape curve in the middle part of new roller shape consistent with working roll ground conth curve；
(3) according to roller shape characterizing definition x1、x2、x3、x4、x5、x6Main points point, seven sections points of new shape of working roll curve point
It does not indicate, as shown in figure 4, formula is as follows:
1) first segment is roller shape convex area, is conic section, formula are as follows:
a1x2+b1x,x≤x1
2) second segment is roller shape protrusion regulatory region, is a curve, formula are as follows:
a2x+b2,x1≤x≤x2
3) third section is Gun Xing convex transitional area, is conic section, formula are as follows:
a3x2+b3x+c3,x2≤x≤x3
4) the 4th section is roller shape sine area, consistent with ground conth curve, is sine curve, formula are as follows:
c/(1-cosα)*(cos(αx/L-α)-cosα),x3≤x≤x4
5) the 5th section of, formula symmetrical with third section opposing work roller body of roll middle line are as follows:
a3(x-2L-b3/a3)2+b3(x-2L-b3/a3)+c3,x4≤x≤x5
6) the 6th section of, formula symmetrical with second segment opposing work roller body of roll middle line are as follows:
a2(2L-x)+b2,x5≤x≤x6
7) the 7th section of, formula symmetrical with first segment opposing work roller body of roll middle line are as follows:
a1(x-2L-b1/a1)2+b1(x-2L-b1/a1),x≥x6
In above formula, c is ground conth curve convex value, mm；α is sinusoidal half angle value of ground conth curve, rad；a1And b1Point
It Wei not roller shape convex area (first segment and the 7th section) roll shape curve two-term coefficient and Monomial coefficient；a2And b2Respectively roller shape
Raised regulatory region (second segment and the 6th section) roll shape curve Monomial coefficient and constant term coefficient；a3, b3And c3Respectively roller shape is convex
Play transition region (third section and the 5th section) roll shape curve two-term coefficient, Monomial coefficient and constant term coefficient；x1=L-B, x2=
L-B+n, x3=L-B+m, x4=L+B-m, x5=L+B-n, x6=L+B, L are the half of working roll barrel length, and B is strip in razor-thin
The half of entrance plate width, n are that roller shape protrusion adjusts sector width, and m is roller shape convex transitional sector width, and L, B, m, n unit are equal
For mm；
(4) according to live grinding machine service condition, new shape of working roll curve discrete data input grinding machine is ground, i.e.,
Obtain the working roll of new roll shape curve.
Strip in razor-thin thickness equations when weighing thickness measuring in step (2) are as follows:
Wherein, h is batten thickness, mm；M is batten quality, g；ρ is batten density, g/mm3；L is batten length, mm；w
For batten width, mm；
Strip in razor-thin convexity and opposite convexity calculation formula are as follows:
Wherein, CxFor the convex value at strip edge x mm, mm；ρxFor the opposite convex value of strip corresponding position；hc
For strip center thickness value, mm；hoxAnd hdxThe respectively thickness of strip fore side and transmission side at strip edge x mm
Value, mm.
Work as ρBefore x rolls≥ρAfter x rollsWhen, it should reduce and roll the tight area's thickness h in rear two sidesoxAnd hdxValue.The area Bian Jin thickness is set to reduce
Δ h and the adjustment factor r numerically equal of roller shape protrusion regulatory region are measured, (selection of thickness reduction Δ h) should be protected adjustment factor r
Demonstrate,prove ρBefore x rolls< ρAfter x rolls, to achieve the purpose that increase the area strip Bian Jin drafts in rolling.Specify working roll ground conth situation, root
Roll shape curve in the middle part of new roller shape is designed according to ground conth situation, original sine roll shape curve is as shown in Figure 3.
It is explained combined with specific embodiments below.
The tight rib wave flatness defect in side occurred after rolling for certain very thin strip of factory's aluminium foil, optimizes its shape of working roll
Design.According to the content of invention, corresponding aluminium foil mill shape of working roll curve is designed.
The aluminium foil strip thickness specification of certain factory production is more, but width specifications are less, this is mentioned for the design of new shape of working roll
Convenience is supplied.Factory's foil mill working roll barrel length is 1610mm, and a certain specification aluminium foil width is 1050mm, and aluminium foil strip leans on
There is periodic longitudinal rib wave flatness defect near part region, such as Fig. 2 (a).Exist after being rolled for this width specifications aluminium foil strip
The tight rib wave flatness defect in side, count the tight sector width in aluminium foil strip side and rib wave dimensional conditions after each 25 rolling of four kinds of trades mark, such as
Shown in table 1.
The tight rib wave situation comparison of 1 four kinds of trade mark fore sides of table and transmission side counts
As shown in Table 1, it rolls the tight sector width in back plate band two sides and rib wave is symmetric substantially, therefore design foil and roll work
Using roll barrel mid-length as symmetry axis when the new roller shape of roller.The tight peak width in strip side is 15~20mm, therefore it is convex to set roller shape
Rising and adjusting sector width n is 20mm.Aluminium foil strip rib wave width be 80~110mm, therefore set roller shape convex transitional sector width m as
100mm。
The cross-sectional profiles for rolling front and back aluminium foil strip to final pass measure, before final pass rolling is calculated
Aluminum foil plate band convexity and opposite convexity situation of change afterwards, as shown in table 2.
The opposite convexity variation after rolling of each passage of 2 strip of table
As shown in Table 2, final pass rolls back plate band and is reduced to 1.47% by 1.86% with respect to convexity, illustrates strip edge phase
It is less than normal to middle part drafts.The area final pass strip Bian Jin is rolled it is found that increasing foil by strip convexity formula and opposite convexity formula
Corresponding shape of working roll value, and then increase the area strip Bian Jin drafts, so that final pass is rolled back plate V belt translation side and fore side thickness
After spending while reducing 0.001mm, opposite convexity will become 2.68%, and aluminium foil strip is with respect to convexity before rolling greater than final pass
1.86%, this shows that drafts increases in the middle part of final pass operation of rolling tabularium edge opposite plate band, is conducive to reduce strip
The tight situation in side.Therefore, it is to increase strip edge drafts, set the adjustment factor r of roller shape protrusion regulatory region as 0.001, work
Roller ground conth curve convexity c is 0.04mm, and sinusoidal half-angle α is 1.222rad, obtains the shape of working roll curve of piecewise combination.
According to working roll barrel length and aluminium foil strip throat width and the above parameter, each sectional curve of shape of working roll curve is obtained
Formula:
X ∈ [0,280], y=-5.430 × 10-7x2+2.541×10-4x；
X ∈ [280,300], y=-5 × 10-5x+0.0426；
X ∈ [300,380], y=6.592 × 10-7x2-4.455×10-4x+0.102；
X ∈ [1230,1310], y=6.592 × 10-7(x-934.149)2-4.455×10-4(x-934.149)+0.102；
X ∈ [1310,1330], y=-5 × 10-5(1610-x)+0.0426；
X ∈ [1330,1610], y=-5.430 × 10-7(x-1142.089)2+2.541×10-4(x-1142.089)；
According to the laterally discrete point data of the available working roll of top working roll curve equation.It is bent to improve shape of working roll
Shape of working roll curve is divided into 161 parts (point-to-point transmission is every 10mm), as shown in table 3 by line precision.X is with the working roll body of roll one
End is the roll lateral coordinates of origin, and unit mm, y are shape of working roll value, unit mm.Fig. 5 is new design work roller roller
Shape curve and ground conth curve comparison figure.
3 working roll axial direction discrete points data of table
The above discrete point roller graphic data is input to grinding machine to be ground, new shape of working roll can be obtained.By new work
Upper machine pilot production is carried out as roller, rear aluminium foil strip shape situation is rolled in observation, it is seen that the tight rib wave flatness defect in side is clearly better, right
It rolls rear each passage aluminum foil plate band cross-sectional profiles and measures calculating, its convexity and opposite convexity situation of change are obtained, such as 4 institute of table
Show.Rolling increases strip edge drafts experiments have shown that after new roller shape of the foil mill working roll using this method design, alleviates
The tight situation in strip side, reduces effect of the tight region in side to local ribs area, the plate shape for improving the tight rib wave of aluminum foil plate band edge is asked
Topic.
The rolling of table 4 tests each passage and rolls rear Parameters variation
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of shape of working roll design method for improving strip in razor-thin and rolling the tight rib wave flatness defect in back, it is characterised in that: including
Steps are as follows:
(1) to roll back plate shape situation to volume 20 or more of strip in razor-thin for statistical analysis, according to rolling rear edge rib wave in very thin bandwidth
The tight sector width of length and strip in razor-thin edge side for spending direction, determines that roller shape convex transitional sector width m and roller shape protrusion regulatory region are wide
Spend n；
(2) operation roll of mill barrel length 2L and strip in razor-thin throat width 2B clearly in production, determines new roller shape protrusion zone position
L-B and L+B；Using the strip cross-sectional profiles before and after the method measurement strip in razor-thin rolling of weighing thickness measuring in the width direction, calculate
The tight region in strip edge side is obtained with respect to convexity, determines that new roller shape protrusion regulatory region adjusts system according to the variable quantity of opposite convex value
Number r；Working roll ground conth convexity c and half angle value α of sine are specified, in the middle part of the new roller shape of working roll ground conth parameter designing
Roll shape curve keeps roll shape curve in the middle part of new roller shape consistent with working roll ground conth curve；
(3) according to roller shape characterizing definition x1、x2、x3、x4、x5、x6Main points point, seven sections of difference tables of new shape of working roll curve point
Show, formula is as follows:
1) first segment is roller shape convex area, is conic section, formula are as follows:
a1x2+b1x,x≤x1
2) second segment is roller shape protrusion regulatory region, is a curve, formula are as follows:
a2x+b2,x1≤x≤x2
3) third section is Gun Xing convex transitional area, is conic section, formula are as follows:
a3x2+b3x+c3,x2≤x≤x3
4) the 4th section is roller shape sine area, consistent with ground conth curve, is sine curve, formula are as follows:
c/(1-cosα)*(cos(αx/L-α)-cosα),x3≤x≤x4
5) the 5th section of, formula symmetrical with third section opposing work roller body of roll middle line are as follows:
a3(x-2L-b3/a3)2+b3(x-2L-b3/a3)+c3,x4≤x≤x5
6) the 6th section of, formula symmetrical with second segment opposing work roller body of roll middle line are as follows:
a2(2L-x)+b2,x5≤x≤x6
7) the 7th section of, formula symmetrical with first segment opposing work roller body of roll middle line are as follows:
a1(x-2L-b1/a1)2+b1(x-2L-b1/a1),x≥x6
In above formula, c is ground conth curve convex value, mm；α is sinusoidal half angle value of ground conth curve, rad；a1And b1Respectively
Roller shape convex area roll shape curve two-term coefficient and Monomial coefficient；a2And b2Respectively roller shape protrusion regulatory region roll shape curve one
Secondary term coefficient and constant term coefficient；a3, b3And c3Respectively Gun Xing convex transitional area roll shape curve two-term coefficient, a term system
Several and constant term coefficient；x1=L-B, x2=L-B+n, x3=L-B+m, x4=L+B-m, x5=L+B-n, x6=L+B, L are work
The half of roller barrel length, B are the half of strip in razor-thin entrance plate width, and n is that roller shape protrusion adjusts sector width, and m is that roller shape is convex
Width of transition zone is played, L, B, m, n unit are mm；
(4) according to live grinding machine service condition, new shape of working roll curve discrete data input grinding machine is ground to get arriving
The working roll of new roll shape curve.
2. the shape of working roll design method according to claim 1 for improving strip in razor-thin and rolling the tight rib wave flatness defect in back,
It is characterized by: step (1) the central roll shape convex transitional sector width m determines method are as follows: cut off along strip in razor-thin length direction
After strip edge one fixed width, rib wave disappears, and counts rib wave in the length value of strip in razor-thin width direction, as m；
Roller shape protrusion adjusts sector width n and determines method are as follows: along strip in razor-thin length direction cutter by the area of edge one fixed width
Domain excision counts the width that strip in razor-thin at this time is removed region, as n until the disappearance of rib wave flatness defect.
3. the shape of working roll design method according to claim 1 for improving strip in razor-thin and rolling the tight rib wave flatness defect in back,
It is characterized by: the step (2) in weighing thickness measuring when strip in razor-thin thickness equations are as follows:
Wherein, h is batten thickness, mm；M is batten quality, g；ρ is batten density, g/mm3；L is batten length, mm；W is batten
Width, mm；
Strip in razor-thin convexity and opposite convexity calculation formula are as follows:
Wherein, CxFor the convex value at strip edge x mm, mm；ρxFor the opposite convex value of strip corresponding position；hcFor plate
Band center thickness value, mm；hoxAnd hdxThe respectively thickness value of strip fore side and transmission side at strip edge x mm, mm.
4. the shape of working roll design method according to claim 3 for improving strip in razor-thin and rolling the tight rib wave flatness defect in back,
It is characterized by: the batten is to cut gained along rear strip in razor-thin width direction is rolled using sampler.
5. the shape of working roll design method according to claim 1 for improving strip in razor-thin and rolling the tight rib wave flatness defect in back,
It is characterized by: this method is suitable for solving the case where rib wave flatness defect tight there are side when strip in razor-thin rolling, the strip in razor-thin
Including steel, aluminium, copper.
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