CN108043874A - A kind of hot-rolling finishing mill roll shape configuration method - Google Patents

A kind of hot-rolling finishing mill roll shape configuration method Download PDF

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Publication number
CN108043874A
CN108043874A CN201711282274.4A CN201711282274A CN108043874A CN 108043874 A CN108043874 A CN 108043874A CN 201711282274 A CN201711282274 A CN 201711282274A CN 108043874 A CN108043874 A CN 108043874A
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China
Prior art keywords
roll
shifting
rolling
working
shape
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CN201711282274.4A
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CN108043874B (en
Inventor
熊文涛
丁美良
孙林
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Jiangsu Shagang Iron and Steel Research Institute Co Ltd
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Jiangsu Shagang Iron and Steel Research Institute Co Ltd
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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
    • B21B1/22—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
    • B21B1/26—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 hot-rolling, e.g. Steckel hot mill
    • 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
    • B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control

Abstract

The present invention relates to a kind of hot-rolling finishing mill roll shape configuration methods, belong to technical field of steel rolling, include including working roll, the configuration of backing roll roll shape and working roll shifting strategy, key technology：Upstream stand F1~F3 working rolls use CVC roll shapes, and backing roll uses CVC roll shapes；Downstream rack F4~F6 working rolls use parabola roll shape, and keep roll shifting, and corresponding backing roll uses VCR (Variable Contact Roll variable contacting lengths roll) roll shape.The present invention improves cold-rolled substrate convexity hit rate, eliminates belt plate shape defect, and extend working roll rolling milimeter number, with good economic efficiency and social benefit by mm finishing mill unit roller system's roll shape and configuration optimization.

Description

A kind of hot-rolling finishing mill roll shape configuration method
Technical field
The invention belongs to technical field of steel rolling, produce cold-rolled substrate suitable for conventional hot continuous rolling machine production line, and in particular to one Kind hot-rolling finishing mill roll shape configuration method.
Background technology
Cold-reduced sheet is widely used in the manufactures such as automobile, electric appliance, aircraft, precision instrument, has dimension precision requirement is high to show Work feature.As the raw material of cold-reduced sheet, in order to adapt to this feature, later process also has cold-rolled substrate plate shape (convexity) quality High requirement.Optimization hot tandem roller system's roll shape and configuration are to improve one of Flatness of Hot Rolled Strip quality efficient means.One side Face, rational roller system roll shape and configuration can make the uniformly extension of strip longitudinal direction, optimize Mill shape modification scope and efficiency, so as to have Good plate shape is obtained beneficial to strip；On the other hand, rational roller system roll shape and configuration can homogeneous roll abrasion, roll is avoided to grind The high low-lying area in strip cross section caused by damage is uneven puts and has led to problems such as muscle, complex seas, while can also extend unit rolling meter Working roll rolling milimeter number, reduces roll change number in drawing, and improves producing line operating rate and reduces production cost.
1700mm conventional hot continuous rolling machines production line is under existing roller system roll shape and configuration, since cold-rolled substrate thickness is small, specification Variation is more, roll-force is relatively large, when production there is the rolling scaduled interior working roll uneven wear of unit and abrasion comparatively fast, cause It rolls milimeter number short (20 kilometers of ＜), roll the problems such as latter stage belt plate shape is bad, influence cold-rolled substrate product quality and producing line Operating rate.
The content of the invention
Present invention aims at a kind of hot-rolling finishing mill roll shape configuration method is provided, strip temperature in unit is connected according to hot rolling The changing rules such as degree, thickness and lateral flow, using the Strip Shape Control of " upstream stand control convexity+downstream rack control glacing flatness " Method, upstream stand F1~F3 working rolls use CVC roll shapes, and downstream rack F4~F6 working rolls use parabola roll shape, and protect The reciprocal roll shifting of working roll is held, controls the glacing flatness of strip, on the premise of belt plate shape is ensured, extends working roll rolling kilometer Number.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of hot-rolling finishing mill roll shape configuration method is configured including working roll, backing roll roll shape and roll shifting, wherein：
(1) upstream stand F1~F3 working rolls use CVC roll shapes, and roll shifting stroke is -100mm~+100mm, and roll is equivalent Convexity is -450 μm~+100 μm, and corresponding support roller uses CVC roll shapes, and roll equivalent crown is -250 μm~+300 μm；
(2) downstream rack F4~F6 working rolls use parabola roll shape, and roll camber is -260 μm；
(3) downstream rack F4~F6 working rolls keep reciprocal roll shifting, and maximum roll shifting amount is ± 85mm, and roll shifting frequency is 1, The middle symmetrical roll shifting of F4, F5 rack, roll shifting step-length are 15mm, and F6 rack roll shiftings step-length is 5mm；
(4) downstream rack F4~F6 backing rolls use VCR roll shapes, and roll profile equation is：
F (x)=a0+a1*x+a2*x2+a3*x3+a4*x4+a5*x5+a6*x6
Wherein：a0=0, a1=1.640542136, a2=-4.778094670e-3, a3=7.739660833e-6, a4=- 7.06480300e-9 a5=3.383324860e-12, a6=-6.645698000e-16.
Further, the rolling scaduled interior working roll rolling milimeter number of unit in the hot-rolling finishing mill roll shape configuration method ＞ 60km.
Compared with prior art, the present invention at least has the advantages that：
1. upstream stand F1~F3 working rolls of the present invention use CVC roll shapes, make full use of CVC roll shape convexity adjustable ranges big Advantage and the characteristics of preferable upstream stand F1~F3 strip lateral flows, on the premise of belt plate shape is ensured, pass through roller Type configures and automatic Crown control makes target convexity of upstream stand F1~F3 outlet convexitys as close possible to equal proportion convexity；Together When, in order to coordinate with working roll, upstream stand F1~F3 support rollers use CVC roll shapes, ensure the stability of continuous rolling；
2. the flatness control of rack F4~F6 strips in downstream of the present invention is mainly distributed real by strip equal proportion convexity It is existing, and roller system roll design mainly considers that homogeneous roll is worn, and avoids uneven wear from being adversely affected caused by plate shape, simultaneously Extend as far as possible working roll rolls milimeter number.For this purpose, downstream rack F4~F6 working rolls use parabola roll shape, and keep work The reciprocal roll shifting of roller makes body of roll different position uniformly worn out by scattered abrasion；Downstream rack F4~F6 support rollers use VCR rollers Type not only optimizes mill roll-gap convexity adjustable range and roller efficiency, also makes stress equalizing between working roll, support roller roller, from And extend working roll rolling milimeter number most possibly.
Description of the drawings
Fig. 1 downstreams rack F4~F6 working roll shifting strategies.
Fig. 2 downstreams rack F4~F6 support roller body of roll curves.
Specific embodiment
Technical scheme is described in further detail below in conjunction with attached drawing and several preferred embodiments, but not only It is limited only to this.
Embodiment 1
Using roller system roll shape allocation plan involved in the present invention rolling for SPHC-1B is carried out in certain 1700mm hot rolling line System, tetra- kinds of specifications of strip steel specification 2.75mm*1287mm, 3mm*1265mm, 3.5*1265mm, 4mm*1500mm amount to 108 Volume.Related process parameters are：
(1) upstream stand F1~F3 working rolls use CVC roll shapes, and roll shifting stroke is -100mm~+100mm, and roll is equivalent Convexity is -450 μm~+100 μm；
(2) it is engaged with upstream stand F1~F3 working rolls, upstream stand F1~F3 support rollers use CVC roll shapes, roll Equivalent crown is -250 μm~+300 μm；
(3) downstream rack F4~F6 working rolls use parabola roll shape, and roll camber is -260 μm；
(4) downstream rack F4~F6 working rolls use reciprocal roll shifting, and maximum roll shifting amount is ± 85mm, and roll shifting frequency is 1, The middle symmetrical roll shifting of F4, F5, roll shifting step-length are 15mm, and F6 rack roll shiftings step-length is 5mm, as shown in Figure 1；
(5) middle and lower reaches rack F4~F6 support rollers use VCR roll shapes, and roll profile equation is as follows：
F (x)=a0+a1*x+a2*x2+a3*x3+a4*x4+a5*x5+a6*x6
Wherein：a0=0, a1=1.640542136, a2=-4.778094670e-3, a3=7.739660833e-6, a4=- 7.06480300e-9 a5=3.383324860e-12, a6=-6.645698000e-16.
Curve is shown in attached drawing 2.
It is as follows to count the SPHC-1B convexity hit rate average values of volume 108,2.75mm*1287mm：91.9%, 3mm*1265mm: 92.4%, 3.5*1265mm：93.6%, 4mm*1500mm：90.1%, working roll rolling milimeter number is 62.3km.
Comparative example 1
Certain same 1700 hot rolling line carry out SPHC-1B rolling, product specification 2.75mm*1260mm, Tri- kinds of specifications of 3.5mm*1285mm, 4mm*1500mm amount to volume 17.Related process parameters are：
(1) F1 racks working roll use CVC roll shapes, roll shifting stroke be -100mm~+100mm, roll equivalent crown for - 350 μm~+200 μm；
(2) F1 racks support roller uses CVC roll shapes, and roll equivalent crown is -250 μm~+300 μm；
(3) F2~F5 racks working roll use CVC roll shapes, roll shifting stroke be -100mm~+100mm, roll equivalent crown For -250 μm~+300 μm；
(4) F2~F5 racks support roller uses CVC roll shapes, and roll equivalent crown is -250 μm~+300 μm；
(5) F6 racks working roll use CVC roll shapes, roll shifting stroke be -100mm~+100mm, roll equivalent crown for - 300 μm~+250 μm；
(6) F6 racks support roller uses CVC roll shapes, and roll equivalent crown is -300 μm~+250 μm.
It is as follows to count the SPHC-1B convexity hit rate average values of volume 17,2.75mm*1260mm：32.5%, 3.5mm* 1285mm：24.9%, 4mm*1500mm：49.4%, rolling latter stage belt plate shape is bad, partly rolls out now bilateral wave, working roll Rolling milimeter number is 12.7km.
Besides these examples, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape Into technical solution, all fall within the present invention claims protection domain.

Claims (2)

1. a kind of hot-rolling finishing mill roll shape configuration method, configures including working roll, backing roll roll shape and roll shifting, feature exists In：
(1) upstream stand F1~F3 working rolls use CVC roll shapes, roll shifting stroke be -100mm~+100mm, roll equivalent crown For -450 μm~+100 μm, corresponding support roller uses CVC roll shapes, and roll equivalent crown is -250 μm~+300 μm；
(2) downstream rack F4~F6 working rolls use parabola roll shape, and roll camber is -260 μm；
(3) downstream rack F4~F6 working rolls keep reciprocal roll shifting, and maximum roll shifting amount is ± 85mm, and roll shifting frequency is 1, wherein The symmetrical roll shifting of F4, F5 rack, roll shifting step-length are 15mm, and F6 rack roll shiftings step-length is 5mm；
(4) downstream rack F4~F6 backing rolls use VCR roll shapes, and roll profile equation is：
F (x)=a0+a1*x+a2*x2+a3*x3+a4*x4+a5*x5+a6*x6
Wherein：a0=0, a1=1.640542136, a2=-4.778094670e-3, a3=7.739660833e-6, a4=- 7.06480300e-9 a5=3.383324860e-12, a6=-6.645698000e-16.
2. hot-rolling finishing mill roll shape configuration method according to claim 1, it is characterised in that：The rolling scaduled interior work of unit As rolling milimeter number ＞ 60km.
CN201711282274.4A 2017-12-07 2017-12-07 A kind of hot-rolling finishing mill roll shape configuration method Active CN108043874B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5413442A (en) * 1977-07-01 1979-01-31 Hitachi Ltd Rolling mill series for controlling sheet crown and shape
JPS6054216A (en) * 1983-09-02 1985-03-28 Nisshin Steel Co Ltd Rolling controlling method
CN101486042A (en) * 2008-01-18 2009-07-22 上海梅山钢铁股份有限公司 Roll shape configuration method for whole-set precision rolling working roll
CN101890429A (en) * 2010-07-22 2010-11-24 首钢总公司 Complete roll forming configuring method for wide flat steel hot rolling finish mill set
CN102553931A (en) * 2011-12-28 2012-07-11 河北省首钢迁安钢铁有限责任公司 Configuration method of precision rolling frame working roll
CN102744260A (en) * 2012-07-09 2012-10-24 首钢总公司 Working roller considering both convexity and edge drop control of strip steel and design method for roller shape of working roller

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5413442A (en) * 1977-07-01 1979-01-31 Hitachi Ltd Rolling mill series for controlling sheet crown and shape
JPS6054216A (en) * 1983-09-02 1985-03-28 Nisshin Steel Co Ltd Rolling controlling method
CN101486042A (en) * 2008-01-18 2009-07-22 上海梅山钢铁股份有限公司 Roll shape configuration method for whole-set precision rolling working roll
CN101890429A (en) * 2010-07-22 2010-11-24 首钢总公司 Complete roll forming configuring method for wide flat steel hot rolling finish mill set
CN102553931A (en) * 2011-12-28 2012-07-11 河北省首钢迁安钢铁有限责任公司 Configuration method of precision rolling frame working roll
CN102744260A (en) * 2012-07-09 2012-10-24 首钢总公司 Working roller considering both convexity and edge drop control of strip steel and design method for roller shape of working roller

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