CN106493174A - Reduce the method that cold-rolling mill intermediate calender rolls retraction end surfaces are peeled off - Google Patents
Reduce the method that cold-rolling mill intermediate calender rolls retraction end surfaces are peeled off Download PDFInfo
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- CN106493174A CN106493174A CN201610971897.1A CN201610971897A CN106493174A CN 106493174 A CN106493174 A CN 106493174A CN 201610971897 A CN201610971897 A CN 201610971897A CN 106493174 A CN106493174 A CN 106493174A
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- Prior art keywords
- calender rolls
- intermediate calender
- unit
- roll
- retraction end
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
- B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The present invention discloses a kind of method for reducing the peeling of cold-rolling mill intermediate calender rolls retraction end surfaces, is ground what sine curve was realized by intersecting bending intermediate calender rolls and intermediate calender rolls retraction end, can reduce retraction end in contact stress spike, and then minimizing intermediate calender rolls retraction end surfaces are peeled off.
Description
Technical field
A kind of the invention belongs to Cold Rolling field, more particularly to minimizing cold-rolling mill intermediate calender rolls retraction end surfaces peeling
Method.
Background technology
Roll surface spalling just refers to the phenomenon that certain region of roll barrel is separated from the body of roll.Roll surface spalling is cold rolling
The principal mode that roller is scrapped, statistics show that the roll caused due to peeling is scrapped and accounts for the 70% of cold roll total flow
More than.
Roller surface is caused the reason for peeling, there are five kinds：
(1) peeling that material defectses are caused.Including roller surface crackle, subsurface stratum crackle.
(2) the improper peeling for causing is heat-treated.Defect origin inside body of roll quench-hardened case is cracked；Quenched improper, group
Knit and effectively refined, uneven microstructure, net carbide cannot be eliminated；
(3) the improper peeling for causing of cold working.Such as roll surface burn.
(4) peeling that improper use causes.The reasons such as steel bonding, skidding, sideslip, broken belt, insufficient lubrication, non-hot-rolling cause to roll
Roller hot-spot, undergoes phase transition, and is changed into alloy martensite, volumetric expansion by alloy austenite, and internal layer center portion changes without this,
Easily crack.
(5) fatigue flake.Under alternation contact stress long term, surface fatigue is damaged, and causes regional area to produce micro-
Crackle.By the subcutaneous shearing stress that contact is caused, crackle is developed by table inwards along a certain inclination angle, penetrate into when there is emulsion
When, due to squeezing action, crackle can be promoted quickly to develop, when the intensity at remaining interface is less than formed tension, be produced
Raw peeling.
The peeling of cold-rolling mill intermediate calender rolls retraction end surfaces is typically caused by tired reason, if lack with raw material simultaneously
Fall into, be heat-treated that improper, cold working is improper or improper use etc., then can accelerate fatigue peeling.Peel off for reducing roller surface, commonly use
Measure include：Shorten the usage cycles of roll, increase stock removal of roll etc..
Content of the invention
For drawbacks described above, the technical problem to be solved is with intersection bending intermediate calender rolls and intermediate calender rolls retraction end
Sinusoidal method is ground, reduces retraction end in contact stress spike, and then reduce intermediate calender rolls retraction end surfaces peeling off.
There is contact stress spike in cold-rolling mill intermediate calender rolls retraction end, after contact point disengages region, contact stress is changed into
Zero.Under the repeated action of this alternate stress, load all causes a certain amount of damage, and this damage to end roll surface each time
Wound can be accumulated.After certain number of times, when damage accumulation reaches critical value, produce on the roll surface of intermediate calender rolls retraction end
Fatigue crack, with the extension of crackle, final surface is peeled off.
Cold-rolling mill intermediate calender rolls retraction end surfaces are affected to occur to peel off the size that basic reason is contact stress kurtosis.Spike
Value is big, and roll retraction end surfaces are susceptible to surface peeling, and roll working life is short；Spike is little, and roll retraction end surfaces are difficult
Generation surface is peeled off, and roll working life is long.
For reaching above-mentioned purpose, following technical scheme is present invention employs：
Reduce the method that cold-rolling mill intermediate calender rolls retraction end surfaces are peeled off, it is characterised in that be by intersect bending intermediate calender rolls and
Intermediate calender rolls retraction end grinding sine curve is realized：
A intersects bending intermediate calender rolls
Intersect bending intermediate calender rolls include symmetrically arranged upper backup roll, upper intermediate calender rolls, top working roll and bottom working roll, lower in
Between roller, lower backing roll；The retraction end roll-bending cylinder of the retraction end roll-bending cylinder of upper intermediate calender rolls and lower intermediate calender rolls is by same servo valve control
System, upper intermediate calender rolls retraction end bending roller force are identical with lower intermediate calender rolls retraction end bending roller force；Upper intermediate calender rolls external part roll-bending cylinder and lower in
Between roller external part roll-bending cylinder by same servo valve control, upper intermediate calender rolls external part bending roller force and lower intermediate calender rolls external part bending roller force
Identical；
Upper intermediate calender rolls external part bending roller force is FIUO, upper intermediate calender rolls retraction end bending roller force is FIUI, lower intermediate calender rolls external part is curved
Roller power FIBO, lower intermediate calender rolls retraction end bending roller force is FIBI；
FIUO=FIBO=(1+ α) FI
FIUI=FIBI=(1- α) FI
FIIntermediate calender rolls set bending roller force, unit：kN；
FI=k0+k1·W+k2·F+k3·F·W+k4·F/W+k5·Dw
+k6·DI+k7·Db+k8·Cw+k9·Cg+k10·Δh
W steel plate widths, unit：mm；
F roll-forces, unit：kN；
DwLower work roller diameter mean value, unit：mm；
DIRoller diameter mean value, unit in the middle of up and down：mm；
DbUpper lower backing roll diameter mean value, unit：mm；
CwWork roll crown, unit：μm；
CgTarget convexity, unit：μm；
Δ h frame drafts, unit：mm；
k0Constant term, unit：kN；
k1Steel plate width coefficient, unit：kN/mm；
k2Rolling force coefficient, dimensionless；
k3Roll-force and steel plate width product coefficient, unit：1/mm；
k4Roll-force and steel plate width quotient system number, unit：mm；
k5Lower work roller diameter mean value coefficient, unit：kN/mm；
k6Roller diameter mean value coefficient, unit in the middle of up and down：kN/mm；
k7The average value coefficient of upper lower backing roll diameter, unit：kN/mm；
k8Work roll crown coefficient, unit：kN/μm；
k9Target convexity coefficient, unit：kN/μm；
k10Frame depresses coefficient of discharge, unit：kN/mm；
k0～k10It is according to the actual strip width W for measuring, rolling force F, lower work roller diameter mean value Dw, up and down in
Between roller diameter mean value DI, upper lower backing roll diameter mean value Db, work roll crown Cw, frame drafts Δ h and target convexity
Cg, determined with the method that data are fitted.
α differential factors；
Δ x intermediate calender rolls axial movement values, unit：mm；
ΔxmaxIntermediate calender rolls axial movement value maximum, unit：mm；
Chord curve is rectified in the retraction of b intermediate calender rolls
With the rectangular coordinate system that x → Δ y is set up on intermediate calender rolls retraction end roll surface shaft shoulder summit as origin, x coordinate axle and centre
Roller roll surface overlaps, and Δ y-coordinate axle is overlapped with end face；It is shaped as curve AB after the grinding of intermediate calender rolls retraction end, A rising for curve
Point, midpoints of the B for curve, on Δ y-coordinate axle, B points are on x coordinate axle for A points；Intermediate calender rolls retraction end stock removal is：
Δ y intermediate calender rolls roller end stock removals, unit：mm；
The abscissa that puts on x curves, unit：mm；
LCProjected lengths of the curve AB on x coordinate axle, unit：mm；
T coefficients, value 0.00125～0.01.
The present invention can reduce retraction using bending intermediate calender rolls and the sinusoidal method of intermediate calender rolls retraction end grinding is intersected
End in contact stress spike, and then reduce the peeling of intermediate calender rolls retraction end surfaces.
Description of the drawings
Fig. 1 intersects bending intermediate calender rolls schematic diagram for the present invention；
Fig. 2 is intermediate roll crossing flexural loading figure of the present invention；
Fig. 3 is intermediate calender rolls retraction end coordinate system of the present invention；
Fig. 4 is that intermediate calender rolls roller end of the present invention is ground curve；
Wherein, 1 upper backup roll；Intermediate calender rolls on 2；3 top working rolls；Intermediate calender rolls external part roll-bending cylinder on 4；5—
Steel plate；6 bottom working rolls；7 times intermediate calender rolls retraction end roll-bending cylinders；8 times intermediate calender rolls；Intermediate calender rolls and the contracting of lower intermediate calender rolls on 9
Enter to hold roll-bending cylinder servo valve；Intermediate calender rolls and lower intermediate calender rolls external part roll-bending cylinder servo valve on 10；11 lower backing rolls；Under 12
Intermediate calender rolls external part roll-bending cylinder；Intermediate calender rolls retraction end roll-bending cylinder on 13.
Specific embodiment
With reference to embodiment, the present invention is described in detail.
1st, bending intermediate calender rolls are intersected
Intermediate roll crossing roller method is as shown in figure 1, the retraction end of the retraction end roll-bending cylinder of upper intermediate calender rolls and lower intermediate calender rolls
Roll-bending cylinder, uses same servo valve control, and upper intermediate calender rolls retraction end bending roller force is identical with lower intermediate calender rolls retraction end bending roller force.In upper
Between roller external part roll-bending cylinder and lower intermediate calender rolls external part roll-bending cylinder, use same servo valve control, upper intermediate calender rolls external part roller
Power is identical with lower intermediate calender rolls external part bending roller force.
Upper intermediate calender rolls external part bending roller force is F as shown in Figure 2IUO, upper intermediate calender rolls retraction end bending roller force is FIUI, lower intermediate calender rolls
External part bending roller force FIBO, lower intermediate calender rolls retraction end bending roller force is FIBI.
FIUO=FIBO=(1+ α) FI
FIUI=FIBI=(1- α) FI
FIIntermediate calender rolls set bending roller force, unit：kN；
FI=k0+k1·W+k2·F+k3·F·W+k4·F/W+k5·Dw
+k6·DI+k7·Db+k8·Cw+k9·Cg+k10·Δh
W steel plate widths, unit：mm；
F roll-forces, unit：kN；
DwLower work roller diameter mean value, unit：mm；
DIRoller diameter mean value, unit in the middle of up and down：mm；
DbUpper lower backing roll diameter mean value, unit：mm；
CwWork roll crown, unit：μm；
CgTarget convexity, unit：μm；
Δ h frame drafts, unit：mm；
k0Constant term, unit：kN；
k1Steel plate width coefficient, unit：kN/mm；
k2Rolling force coefficient, dimensionless；
k3Roll-force and steel plate width product coefficient, unit：1/mm；
k4Roll-force and steel plate width quotient system number, unit：mm；
k5Lower work roller diameter mean value coefficient, unit：kN/mm；
k6Roller diameter mean value coefficient, unit in the middle of up and down：kN/mm；
k7The average value coefficient of upper lower backing roll diameter, unit：kN/mm；
k8Work roll crown coefficient, unit：kN/μm；
k9Target convexity coefficient, unit：kN/μm；
k10Frame depresses coefficient of discharge, unit：kN/mm；
k0～k10It is according to the actual strip width W for measuring, rolling force F, lower work roller diameter mean value Dw, up and down in
Between roller diameter mean value DI, upper lower backing roll diameter mean value Db, work roll crown Cw, frame drafts Δ h and target convexity
Cg, determined with the method that data are fitted.
α differential factors；
Δ x intermediate calender rolls axial movement values, (unit：mm)；
ΔxmaxIntermediate calender rolls axial movement value maximum (determined by the mechanical property of milling train transfer roller structure), (unit：
mm).
2nd, chord curve is rectified in intermediate calender rolls retraction
With the rectangular coordinate system that x → Δ y is set up on intermediate calender rolls retraction end roll surface shaft shoulder summit as origin, as shown in figure 3, x sits
Parameter is overlapped with intermediate calender rolls roll surface, and Δ y-coordinate axle is overlapped with section.Intermediate calender rolls retraction end grinding after be shaped as curve AB, A is
The starting point of curve, midpoints of the B for curve, on Δ y-coordinate axle, B points are on x coordinate axle for A points.Intermediate calender rolls retraction end stock removal
For：
Δ y intermediate calender rolls roller end stock removals, (unit：mm)；
The abscissa that puts on x curves, (unit：mm)；
LCProjected lengths of the curve AB on x coordinate axle, (unit：mm)；
T coefficients, value 0.00125～0.01.
Fig. 4 is certain 1450 rolling-mill middle roller retraction end roller end grinding curve, T=0.005, LC=155mm.
Claims (2)
1. a kind of method that minimizing cold-rolling mill intermediate calender rolls retraction end surfaces are peeled off, it is characterised in that be by intersecting bending intermediate calender rolls
It is ground what sine curve was realized with intermediate calender rolls retraction end：
A intersects bending intermediate calender rolls
Intersecting bending intermediate calender rolls includes symmetrically arranged upper backup roll, upper intermediate calender rolls, top working roll and bottom working roll, lower centre
Roller, lower backing roll；The retraction end roll-bending cylinder of the retraction end roll-bending cylinder of upper intermediate calender rolls and lower intermediate calender rolls by same servo valve control,
Upper intermediate calender rolls retraction end bending roller force is identical with lower intermediate calender rolls retraction end bending roller force；Upper intermediate calender rolls external part roll-bending cylinder and lower intermediate calender rolls
External part roll-bending cylinder is by same servo valve control, upper intermediate calender rolls external part bending roller force and lower intermediate calender rolls external part bending roller force phase
With；
Upper intermediate calender rolls external part bending roller force is FIUO, upper intermediate calender rolls retraction end bending roller force is FIUI, lower intermediate calender rolls external part bending roller force
FIBO, lower intermediate calender rolls retraction end bending roller force is FIBI；
FIUO=FIBO=(1+ α) FI
FIUI=FIBI=(1- α) FI
FIIntermediate calender rolls set bending roller force, unit：kN；
FI=k0+k1·W+k2·F+k3·F·W+k4·F/W+k5·Dw
+k6·DI+k7·Db+k8·Cw+k9·Cg+k10·Δh
W steel plate widths, unit：mm；
F roll-forces, unit：kN；
DwLower work roller diameter mean value, unit：mm；
DIRoller diameter mean value, unit in the middle of up and down：mm；
DbUpper lower backing roll diameter mean value, unit：mm；
CwWork roll crown, unit：μm；
CgTarget convexity, unit：μm；
Δ h frame drafts, unit：mm；
k0Constant term, unit：kN；
k1Steel plate width coefficient, unit：kN/mm；
k2Rolling force coefficient, dimensionless；
k3Roll-force and steel plate width product coefficient, unit：1/mm；
k4Roll-force and steel plate width quotient system number, unit：mm；
k5Lower work roller diameter mean value coefficient, unit：kN/mm；
k6Roller diameter mean value coefficient, unit in the middle of up and down：kN/mm；
k7The average value coefficient of upper lower backing roll diameter, unit：kN/mm；
k8Work roll crown coefficient, unit：kN/μm；
k9Target convexity coefficient, unit：kN/μm；
k10Frame depresses coefficient of discharge, unit：kN/mm；
α differential factors；
Δ x intermediate calender rolls axial movement values, unit：mm；
ΔxmaxIntermediate calender rolls axial movement value maximum, unit：mm；
Chord curve is rectified in the retraction of b intermediate calender rolls
With the rectangular coordinate system that x → Δ y is set up on intermediate calender rolls retraction end roll surface shaft shoulder summit as origin, x coordinate axle and intermediate calender rolls roller
Face overlaps, and Δ y-coordinate axle is overlapped with end face；It is shaped as curve AB after the grinding of intermediate calender rolls retraction end, starting points of the A for curve, B is
The midpoint of curve, on Δ y-coordinate axle, B points are on x coordinate axle for A points；Intermediate calender rolls retraction end stock removal is：
Δ y intermediate calender rolls roller end stock removals, unit：mm；
The abscissa that puts on x curves, unit：mm；
LCProjected lengths of the curve AB on x coordinate axle, unit：mm；
T coefficients, value 0.00125～0.01.
2. the method that a kind of minimizing cold-rolling mill intermediate calender rolls retraction end surfaces according to claim 1 are peeled off, it is characterised in that：
Described k0～k10It is according to the actual strip width W for measuring, rolling force F, lower work roller diameter mean value Dw, up and down in the middle of
Roller diameter mean value DI, upper lower backing roll diameter mean value Db, work roll crown Cw, frame drafts Δ h and target convexity Cg,
Determined with the method that data are fitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610971897.1A CN106493174B (en) | 2016-10-28 | 2016-10-28 | Reduce the method that cold-rolling mill intermediate calender rolls retraction end surfaces peel off |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610971897.1A CN106493174B (en) | 2016-10-28 | 2016-10-28 | Reduce the method that cold-rolling mill intermediate calender rolls retraction end surfaces peel off |
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| Publication Number | Publication Date |
|---|---|
| CN106493174A true CN106493174A (en) | 2017-03-15 |
| CN106493174B CN106493174B (en) | 2018-02-27 |
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110538875A (en) * | 2019-08-27 | 2019-12-06 | 山西太钢不锈钢股份有限公司 | Roller profile for eliminating edge contact part peeling of continuous rolling mill support roller |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58176004A (en) * | 1982-04-07 | 1983-10-15 | Hitachi Ltd | Method and device for determining grinding amount of roll |
| CN102107214A (en) * | 2009-12-24 | 2011-06-29 | 宝山钢铁股份有限公司 | Intermediate roller contour of intermediate roller movable type convexity high-accuracy control temper mill |
| CN102266869A (en) * | 2011-07-28 | 2011-12-07 | 首钢总公司 | Roll system parameter setting method for temper mill unit through strip shape and surface quality control |
| CN203170705U (en) * | 2013-03-26 | 2013-09-04 | 鞍钢股份有限公司 | Board belted steel roll profile |
| CN104785528A (en) * | 2015-03-27 | 2015-07-22 | 山东钢铁股份有限公司 | Method for locating roll-gap-opening no-load channeling roll of UCM rolling mill |
-
2016
- 2016-10-28 CN CN201610971897.1A patent/CN106493174B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58176004A (en) * | 1982-04-07 | 1983-10-15 | Hitachi Ltd | Method and device for determining grinding amount of roll |
| CN102107214A (en) * | 2009-12-24 | 2011-06-29 | 宝山钢铁股份有限公司 | Intermediate roller contour of intermediate roller movable type convexity high-accuracy control temper mill |
| CN102266869A (en) * | 2011-07-28 | 2011-12-07 | 首钢总公司 | Roll system parameter setting method for temper mill unit through strip shape and surface quality control |
| CN203170705U (en) * | 2013-03-26 | 2013-09-04 | 鞍钢股份有限公司 | Board belted steel roll profile |
| CN104785528A (en) * | 2015-03-27 | 2015-07-22 | 山东钢铁股份有限公司 | Method for locating roll-gap-opening no-load channeling roll of UCM rolling mill |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110538875A (en) * | 2019-08-27 | 2019-12-06 | 山西太钢不锈钢股份有限公司 | Roller profile for eliminating edge contact part peeling of continuous rolling mill support roller |
| CN110538875B (en) * | 2019-08-27 | 2020-11-06 | 山西太钢不锈钢股份有限公司 | Roller profile for eliminating edge contact part peeling of continuous rolling mill support roller |
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| Publication number | Publication date |
|---|---|
| CN106493174B (en) | 2018-02-27 |
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