CN107175260B - Wedge-shaped base width control method based on fixed-width side press - Google Patents
Wedge-shaped base width control method based on fixed-width side press Download PDFInfo
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- CN107175260B CN107175260B CN201610141279.4A CN201610141279A CN107175260B CN 107175260 B CN107175260 B CN 107175260B CN 201610141279 A CN201610141279 A CN 201610141279A CN 107175260 B CN107175260 B CN 107175260B
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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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
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Abstract
The present invention relates to steel rolling automation field more particularly to a kind of wedge-shaped base width control methods.Wedge-shaped base is divided into three sections by change width rule by a kind of wedge-shaped base width control method based on fixed-width side press, the dog bone for calculating separately wide section of head and wide section of tail portion is spreaded for correcting drafts, stepping number and stepping-in amount are calculated further according to revised drafts, and last interpolation calculation obtains broadening each stepping drafts of section.The present invention according to host computer issue it is rolling scaduled in include wedge-shaped base width position information and stokehold width gage actual measurement slab true form, in conjunction with conditions such as the beating modular shape of fixed-width side press and the roller-way speeds of service, using under gradually progressive and transformation, the control mode of variable step, ensure the uniformity of wedge-shaped base overall length width after fixed-width side press rolls, the width fluctuations of wedge-shaped base overall length are significantly reduced, the stability and lumber recovery of rolling are improved.
Description
Technical field
The present invention relates to steel rolling automation field more particularly to a kind of wedge-shaped base width control methods.
Background technique
Wedge-shaped base is generated transition base when crystallizer tune is wide in continuous casting casting process.This wedge shape base is by existing
Rolling Automation technology and Controlling model are the setting and control that can not carry out automatic width, it is therefore desirable to specially design some controls
Simulation.
It is disclosed in Chinese patent CN201210211053.9 in the hot rolling width control method of wedge-shaped slab, it is main open
A kind of hot rolling width control method of wedge-shaped slab, it is to the hot rolling of wedge-shaped slab wide in the hot rolling of roughing mill
Degree is controlled, and this method comprises the following steps: (1) carrying out the incoming slab of roughing processing end to end according to wait enter roughing mill
Width is poor, determines whether incoming slab is wedge-shaped slab；(2) after determining the incoming slab is wedge-shaped slab, according to end to end
Width is poor, determines the rolling pass type of the wedge shape slab；(3) according to rolling pass type determining in step 2, to the wedge
Shape slab, which enters after roughing mill, carries out width control using standing roller frame；Hot tandem is effectively improved to roll in wedge-shaped base
Width control effect in the process, the rolling for promoting abnormal slab play positive effect；But this patent can only answer
It for the standing roller frame of hot rolling roughing mill, can not be applied in fixed-width side press, and the head and tail width difference of incoming slab cannot
More than 100mm, the equipment control ability of edger roll otherwise will exceed and pressure release；In addition, being limited to the dynamic regulation response energy of edger roll
Power, the long stroke controlling curve of edger roll roll gap can only be the broken line of straight line or two sections of rectilinear(-al)s, along with the position of edger roll
Tracking error is set, the poor biggish wedge-shaped base of and head and tail width complex for true form carries out width using above-mentioned patent
Automatic control is difficult to obtain good effect.
Currently, domestic newly-built continuous hot-rolling mill is provided with fixed-width side press, many old factories also increase by technological transformation
Fixed-width side press, and the producing line having also adds stokehold width gage, provides good set for the width control of wedge-shaped base
Standby condition and testing conditions.As increasingly fierceness, requirement of the user to strip width precision of market competition are constantly promoted, how
It realizes that full-automatic width when wedge-shaped slab rolling is controlled using fixed-width side press, improves the width accuracy of wedge-shaped slab, have become
For problem in the urgent need to address.Therefore, it is badly in need of developing a kind of wedge-shaped accurate controlling party of base width based on fixed-width side press
Method.
In addition, in the prior art without reference to how guaranteeing this problem of Surface Quality of Steel Billet in rolling wedge-shaped base；?
Due to the constraint by undeformed position when edger roll pricks side, it is restricted extension, side as shown in Figure 1 can be formed in two edge
Edge thickness increases to form protrusion, and the protrusion is usually known as dog bone, and this protrusion seriously affects strip shape quality, and dog bone is through subsequent water
After flat rack rolling, other than the extension that a part becomes on length direction, another part is put on display in the direction of the width, we claim
Spread for dog bone；The protrusion is compare very small since width drafts and plate are wide when pricking side, is plastically deformed and only concentrates on plate
What broad edge position generated, lack dog bone is controlled to improve the control of the fixed-width side press of strip shape quality in the prior art
Method.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of wedge-shaped base width control method based on fixed-width side press,
Solves the width control problem that head and tail width difference in hot continuous rolling production is more than the wedge-shaped base of 100mm, by wedge-shaped base width
The confirmation of location information and stokehold width gage actual measurement blank shape, ability is big using fixed-width side press pressure, step-length is controllable
Feature, in conjunction with the absolute spread after slab rough rolling export goal width and side pressure, to wedge-shaped base end to end and adjust wide portion to count respectively
Its drafts and side pressure roll gap are calculated, and according to adjusting the change width rate in width portion to calculate stepping length, to reach wedge-shaped base width
Accurate control.
The present invention is implemented as follows: a kind of wedge-shaped base width control method based on fixed-width side press, with head and tail width
Unequal slab is wedge-shaped base, sets the target width of slab to be processed；It is to be added when being determined from the size of plate blank parameter of acquisition
After work slab is wedge-shaped base, follow the steps below:
S1: wedge-shaped base is divided into three sections, three sections are respectively wide section of head, the wide section of middle part tune and wide section of tail portion；
S2: the dog bone for calculating separately wide section of head and wide section of tail portion spreads；
S3: it is depressed according to the slab that target width and size of plate blank parameter calculate separately wide section of head and wide section of tail portion
Amount, and is spreaded with dog bone and is modified to slab drafts, obtain wide section of head, wide section of tail portion amendment drafts and in
Wide section of portion's tune of average drafts；
S4: three sections of stepping number and stepping-in amount are calculated according to amendment drafts and average drafts；
S5: middle part is calculated according to the stepping-in amount of the wide section of middle part tune and stepping number, each stepping of wide section is adjusted to depress
Amount completes the machined parameters setting of the slab to be processed.
The dog bone of wide section of head and tail portion uniform thickness section is spreaded in the step S2 is calculated by formula 1, head etc.
Wide section dog bone spreads DH, the wide segment trailer dog bone in tail portion spreads DT；
D=Δ W × (1-E) (1)
In formula, E is pressure efficiency；E=(a1×ΔW/W0+b1)×c1
Δ W is slab drafts；
a1,b1,c1For empirical coefficient, obtained by experiment；
When the pressure efficiency and dog bone that calculate wide section of head are spreaded, Δ W=WH-WSP W0=WH
When the pressure efficiency and dog bone that calculate wide section of tail portion are spreaded, Δ W=WT-WSP W0=WT
WHFor wide section of head width；
WTFor wide section of tail portion width；
WSPFor target width.
In the step S3, amendment drafts and average drafts are；
Wide section of head amendment drafts Δ WH=WH-WSP+DH；
Wide section of tail portion amendment drafts Δ WT=WT-WSP+DT；
Tune wide section in middle part is averaged drafts Δ WB=(Δ WH+ΔWT)/2。
Calculated in the step S4 stepping number and stepping-in amount the specific steps are,
Length of the slab after side pressure is calculated according to formula 2 in step 1；
In formula, L1For length after the side pressure of slab；
L0For length before the side pressure of slab；
H is inlet thickness when slab enters fixed-width side press；
a2,b2,c2For empirical coefficient, obtained by experiment；
The length L ' after calculating the side pressure on wide section of headH=L1When: Δ W=Δ WH, W0=WH, L0=LH；
The length L ' after calculating the side pressure of wide section of tail portionT=L1When: Δ W=Δ WT, W0=WT, L0=LT；
Length L' after calculating middle part and adjusting the side pressure of wide sectionB=L1When: Δ W=Δ WB, W0=(WH+WT)/2, L0=LB；
LHFor length before the side pressure of wide section of head；
LTFor length before the side pressure of wide section of tail portion；
LBFor length before the wide section side pressure of middle part tune；
The contact length L that fixed-width side press pats module and slab is calculated according to formula 3 in step 2C；
LC=L0+(L1-L0)×k (3)
In formula, k is empirical parameter, is obtained by experiment；
Calculate the contact length L on wide section of head with side compression machine moduleHCWhen: LHC=LC, L 'H=L1, L0=LH；
Calculate the contact length L of wide section of tail portion with side compression machine moduleTCWhen: LTC=LC, L 'T=L1, L0=LT；
Calculate the contact length L that wide section and side compression machine module are adjusted in middle partBCWhen: LBC=LC, L 'B=L1, L0=LB；
Step 3 transports length Lp according to the maximum slab of fixed-width side press and three sections of respective stepping numbers is calculated,
Wide section of head stepping times NHC=LHC/Lp+1；
Wide section of tail portion stepping times NTC=LTC/Lp+1；
The wide section stepping times N of middle part tuneBC=LBC/Lp+1；
NHC、NTC、NBCFor the integer to truncate；
Stepping-in amount is calculated according to stepping number in step 4,
Wide section of head stepping-in amount Δ LH=LHC/NHC；
The wide section stepping-in amount Δ L of middle part tuneB=LBC/NBC；
Wide section of tail portion stepping-in amount Δ LT=Lp.
Wide section of each stepping drafts is adjusted to be calculated by formula 4 in the middle part；
ΔWBi=Δ WH-(ΔWH-ΔWT)/NBC×i (4)
In formula, i=1,2 ..., NBC；
ΔWBiDrafts when section i-th stepping wide for middle part tune.
The present invention is based on the rolling scaduled middle packets that the wedge-shaped base width control method of fixed-width side press is issued according to host computer
The slab true form of wedge-shaped base width position information and stokehold the width gage actual measurement contained, in conjunction with the beating module of fixed-width side press
The conditions such as shape and the roller-way speed of service calculate separately wedge-shaped base head, the drafts of tail portion and tune wide portion and corresponding dog
Bone spreads, and uses accordingly to slab head, tail portion and the carry out setup algorithm respectively for adjusting width portion depressing position and stepping length
Gradually under progressive and transformation, the control mode of variable step, it is ensured that wedge-shaped base after fixed-width side press rolls overall length width it is uniform
Unanimously；
The present invention takes full advantage of the fixed-width side press pressure feature that ability is big, step-length is controllable in control, for wedge shape
The width position information of base, in conjunction with the absolute spread after slab rough rolling export goal width and side pressure, to wedge-shaped base end to end and adjust
Wide portion does not calculate its drafts and side pressure roll gap, and according to adjusting the change width rate of wide portion to calculate stepping length, to reach
To the accurate control requirement of wedge-shaped base width, the width fluctuations of wedge-shaped base overall length are significantly reduced, the stabilization of rolling is improved
Property and lumber recovery.
Detailed description of the invention
Slab edge thickness increases the schematic diagram to form protrusion when Fig. 1 is side pressure；
Fig. 2 is using the wedge-shaped base signal controlled the present invention is based on the wedge-shaped base width control method of fixed-width side press
Figure；
Fig. 3 is that the present invention is based on the flow diagrams of the wedge-shaped base width control method of fixed-width side press；
Fig. 4 is to be processed shape comparison diagram before and after the processing of wedge-shaped base；
Fig. 5 is the width of plate slab precision schematic diagram that the method for the present invention is processed.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after having read the content of the invention stated, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiment 1
As shown in figure 3, a kind of wedge-shaped base width control method based on fixed-width side press, with the unequal plate of head and tail width
Base is wedge-shaped base, sets the target width of slab to be processed；Wedge-shaped base shape to be processed is as shown in Figure 2, wherein WHFor head
Wide section of width, WTFor wide section of tail portion width, WSPFor target width, LHFor the wide segment length in head, LTFor the wide segment length in tail portion
Degree, LBFor the wide segment length of middle part tune；The dimensional parameters of above-mentioned wedge shape base are issued by host computer or by stokehold width gage realities
It surveys；
After determining that slab to be processed is wedge-shaped base from the size of plate blank parameter of acquisition, follow the steps below:
S1: wedge-shaped base is divided into three sections, three sections are respectively wide section of head, the wide section of middle part tune and wide section of tail portion；
S2: the dog bone for calculating separately wide section of head and wide section of tail portion spreads；
Slab is after fixed-width side press is depressed, since the width of slab is far longer than thickness, slab edge by
Power cannot infiltrate into slab center completely, and the edge of slab can generate protuberance, increase thickness, referred to as dog bone.Dog bone is after
After continuous horizontal frames rolling, other than the extension that a part becomes on length direction, another part is put on display in the direction of the width, I
Be referred to as dog bone spread.
Dog bone spreads D and is calculated by formula 1, and wide section of head dog bone spreads DH, the wide segment trailer dog bone in tail portion is wide
Open up DT；
D=Δ W × (1-E) (1)
In formula, E is pressure efficiency；E=(a1×ΔW/W0+b1)×c1
Δ W is slab drafts；
a1,b1,c1For empirical coefficient, obtained by experiment；
When the pressure efficiency and dog bone that calculate wide section of head are spreaded, Δ W=WH-WSP W0=WH；
When the pressure efficiency and dog bone that calculate wide section of tail portion are spreaded, Δ W=WT-WSP W0=WT；
S3: it is depressed according to the slab that target width and size of plate blank parameter calculate separately wide section of head and wide section of tail portion
Amount, and is spreaded with dog bone and is modified to slab drafts, obtain wide section of head, wide section of tail portion amendment drafts and in
Wide section of portion's tune of average drafts；
In the present invention, it in order to eliminate the error that dog bone generates, needs to be modified slab drafts, corrects drafts
It is with average drafts；
Wide section of head amendment drafts Δ WH=WH-WSP+DH；
Wide section of tail portion amendment drafts Δ WT=WT-WSP+DT；
Tune wide section in middle part is averaged drafts Δ WB=(Δ WH+ΔWT)/2。
S4: three sections of stepping number and stepping-in amount are calculated according to amendment drafts and average drafts；
Calculate stepping number and stepping-in amount the specific steps are,
Length of the slab after side pressure is calculated according to formula 2 in step 1；
In formula, L1For length after the side pressure of slab；
L0For length before the side pressure of slab；
H is inlet thickness when slab enters fixed-width side press；
a2,b2,c2For empirical coefficient, obtained by experiment；
The length L ' after calculating the side pressure on wide section of headH=L1When: Δ W=Δ WH, W0=WH, L0=LH；
The length L ' after calculating the side pressure of wide section of tail portionT=L1When: Δ W=Δ WT, W0=WT, L0=LT；
Length L' after calculating middle part and adjusting the side pressure of wide sectionB=L1When: Δ W=Δ WB, W0=(WH+WT)/2, L0=LB；
The contact length L that fixed-width side press pats module and slab is calculated according to formula 3 in step 2C；
When slab is patted in fixed-width side press, compressed width in addition to part formed dog bone other than, can also forward,
The length for stretching, and stretching backward backward pats the contact length of module and slab by side compression machine is directly influenced, therefore processes
The contact length to three sections is needed to be respectively calculated when wedge-shaped base:
LC=L0+(L1-L0)×k (3)
In formula, k is empirical parameter, is obtained by experiment；
Calculate the contact length L on wide section of head with side compression machine moduleHCWhen: LHC=LC, L 'H=L1, L0=LH；
Calculate the contact length L of wide section of tail portion with side compression machine moduleTCWhen: LTC=LC, L 'T=L1, L0=LT；
Calculate the contact length L that wide section and side compression machine module are adjusted in middle partBCWhen: LBC=LC, L 'B=L1, L0=LB；
Step 3 transports length Lp according to the maximum slab of fixed-width side press and three sections of respective stepping numbers is calculated,
Slab has extension when due to pressure, has to prolong in view of what is once depressed before it in each stepping length
Exhibition, therefore the module of fixed-width side press to the stepping number of wedge-shaped base, i.e., number of blows is by depressing deformed slab length, i.e.,
Contact length and maximum slab conveying length Lp determine that calculation method is as follows:
Wide section of head stepping times NHC=LHC/Lp+1；
Wide section of tail portion stepping times NTC=LTC/Lp+1；
The wide section stepping times N of middle part tuneBC=LBC/Lp+1；
NHC、NTC、NBCFor the integer to truncate；
Stepping-in amount is calculated according to stepping number in step 4,
Wide section of head stepping-in amount Δ LH=LHC/NHC；
The wide section stepping-in amount Δ L of middle part tuneB=LBC/NBC；
In the tail portion of wedge-shaped base, in order to accelerate to roll, improve rolling rhythm, the present invention in, removed with maximum stepping-in amount
It send, therefore, wide section of tail portion stepping-in amount Δ LT=Lp.
S5: middle part is calculated according to the stepping-in amount of the wide section of middle part tune and stepping number, each stepping of wide section is adjusted to depress
Amount completes the machined parameters setting of the slab to be processed.
The method of each stepping drafts linear interpolation of the wide section of middle part tune calculates, and is calculated by formula 4:
ΔWBi=Δ WH-(ΔWH-ΔWT)/NBC×i (4)
In formula, i=1,2 ..., NBC；
ΔWBiDrafts when section i-th stepping wide for middle part tune.
In order to guarantee machining accuracy, width W before the pressure of the wide section i-th stepping of middle part tune usually can be also calculatedBi, same benefit
It is calculated with the method for linear interpolation by formula 5:
WBi=WH-(WH-WT)/NBC×i (5)
I=1,2 ..., NBC
Since wedge-shaped base head and tail width is different, the big one end pressure of width is more, and the dog bone of generation is also more, therefore, such as Fig. 4
Shown, for wedge-shaped base after fixed-width side press is depressed, shape can become inverted ladder type by trapezoidal.
By taking the width control in certain wedge-shaped base process as an example:
Wide section of wedge shape base head width WH=1370.8mm, wide section of tail portion width WT=1202.7mm, slab overall length
Spend 9700mm, the wide segment length L in headH=2009mm, the wide segment length L of middle part tuneB=3068mm, target width WSPTarget width
For 1134mm.
Head claps position regulation value 300mm.
Equipment limit maximum stepping-in amount is 428mm.
It is obtained after then calculating:
1) dog bone spreads
Dog bone spreads=Δ W × (1- (a1×ΔW/W0+b1)×c1)
Wide section of head drafts=1370.8-1134=236.8mm is calculated wide section of head dog bone and spreads DHFor
19.01mm；
Wide section of tail portion drafts=1202.7-1134=68.7mm is calculated the wide segment trailer dog bone in tail portion and spreads
DTFor 9.62mm；
2) wide section of revised head amendment drafts Δ WH=236.8+19.01=255.81mm；
Wide section of tail portion amendment drafts Δ WT=68.7+9.62=78.32mm；
In this way after subsequent horizontal passage is spreaded, deviation end to end can be eliminated, forms the slab of rectangle.
3) number is depressed
The wide segment length in head is 2009mm, and it is 2184.99mm that contact length, which is calculated, it is contemplated that head claps position and is
300, therefore per having 5 times into less than 428mm step by step, depressing stepping-in amount every time is (2184.99-300)/5=376.99mm；
Tune wide segment length in middle part is 3068mm, and it is 3257.83mm that contact length, which is calculated, therefore per step by step into being less than
428mm has 8 times, and depressing stepping-in amount every time is 3257.83/8=407.22mm；
The wide segment length in tail portion is 9700-2009-3068=4623mm, and it is 4768.31 that contact length, which is calculated,.Because
The every step depressing position in tail portion is consistent, and until slab submitting large lateral pressure, therefore can be transported with maximum step-length to save the time,
Therefore it is 428mm that stepping-in amount is depressed in tail portion every time, and pressure number is 12 times.
4) every step depressing position is calculated according to stepping-in amount and drafts, wide section of tail portion is determined with linear interpolation method.It calculates
The results are shown in Table 1, the width accuracy after finish to gauge as shown in figure 5, overall length width fluctuations control within 4mm, reached compared with
High width controls precision.
1 machined parameters table of table
Claims (2)
1. a kind of wedge-shaped base width control method based on fixed-width side press, it is characterized in that: with the unequal slab of head and tail width
For wedge-shaped base, the target width of slab to be processed is set；When from the size of plate blank parameter of acquisition determine slab to be processed for wedge shape
After base, follow the steps below:
S1: wedge-shaped base is divided into three sections, three sections are respectively wide section of head, the wide section of middle part tune and wide section of tail portion；
S2: the dog bone for calculating separately wide section of head and wide section of tail portion spreads；
S3: calculating separately the slab drafts of wide section of head and wide section of tail portion according to target width and size of plate blank parameter,
And spreaded with dog bone and slab drafts is modified, obtain wide section of head, the amendment drafts of wide section of tail portion and middle part
Adjust the average drafts of wide section；
S4: three sections of stepping number and stepping-in amount are calculated according to amendment drafts and average drafts；
S5: being calculated each stepping drafts that wide section is adjusted at middle part according to the stepping-in amount of the wide section of middle part tune and stepping number, complete
It is set at the machined parameters of the slab to be processed；
The dog bone of wide section of head and tail portion uniform thickness section is spreaded in the step S2 is calculated by formula 1, wide section of head
Dog bone spreads DH, the wide segment trailer dog bone in tail portion spreads DT；
D=△ W × (1-E) (1)
In formula, E is pressure efficiency；E=(a1×△W/W0+b1)×c1
△ W is slab drafts；
a1,b1,c1For empirical coefficient, obtained by experiment；
When the pressure efficiency and dog bone that calculate wide section of head are spreaded, △ W=WH-WSP W0=WH
When the pressure efficiency and dog bone that calculate wide section of tail portion are spreaded, △ W=WT-WSP W0=WT
WHFor wide section of head width；
WTFor wide section of tail portion width；
WSPFor target width；
In the step S3, amendment drafts and average drafts are；
Wide section of head amendment drafts △ WH=WH-WSP+DH；
Wide section of tail portion amendment drafts △ WT=WT-WSP+DT；
Tune wide section in middle part is averaged drafts △ WB=(△ WH+△WT)/2；
Calculated in the step S4 stepping number and stepping-in amount the specific steps are,
Length of the slab after side pressure is calculated according to formula 2 in step 1；
In formula, L1For length after the side pressure of slab；
L0For length before the side pressure of slab；
H is inlet thickness when slab enters fixed-width side press；
a2,b2,c2For empirical coefficient, obtained by experiment；
Length L' after calculating the side pressure on wide section of headH=L1When: △ W=△ WH, W0=WH, L0=LH；
Length L' after calculating the side pressure of wide section of tail portionT=L1When: △ W=△ WT, W0=WT, L0=LT；
Length L' after calculating middle part and adjusting the side pressure of wide sectionB=L1When: △ W=△ WB, W0=(WH+WT)/2, L0=LB；
LHFor length before the side pressure of wide section of head；
LTFor length before the side pressure of wide section of tail portion；
LBFor length before the wide section side pressure of middle part tune；
The contact length L that fixed-width side press pats module and slab is calculated according to formula 3 in step 2C；
LC=L0+(L1-L0)×k (3)
In formula, k is empirical parameter, is obtained by experiment；
Calculate the contact length L on wide section of head with side compression machine moduleHCWhen: LHC=LC, L'H=L1, L0=LH；
Calculate the contact length L of wide section of tail portion with side compression machine moduleTCWhen: LTC=LC, L'T=L1, L0=LT；
Calculate the contact length L that wide section and side compression machine module are adjusted in middle partBCWhen: LBC=LC, L'B=L1, L0=LB；
Step 3 transports length Lp according to the maximum slab of fixed-width side press and three sections of respective stepping numbers is calculated,
Wide section of head stepping times NHC=LHC/Lp+1；
Wide section of tail portion stepping times NTC=LTC/Lp+1；
The wide section stepping times N of middle part tuneBC=LBC/Lp+1；
NHC、NTC、NBCFor the integer to truncate；
Stepping-in amount is calculated according to stepping number in step 4,
Wide section of head stepping-in amount △ LH=LHC/NHC；
The wide section stepping-in amount △ L of middle part tuneB=LBC/NBC；
Wide section of tail portion stepping-in amount △ LT=Lp.
2. the wedge-shaped base width control method based on fixed-width side press as described in claim 1, it is characterized in that: the middle part tune
Wide section of each stepping drafts is calculated by formula 4；
△WBi=△ WH-(△WH-△WT)/NBC×i (4)
In formula, i=1,2 ..., NBC；
△WBiDrafts when section i-th stepping wide for middle part tune.
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| CN109772894B (en) * | 2017-11-14 | 2020-09-25 | 宝山钢铁股份有限公司 | Strip steel width control method for hot rolling wedge-shaped blank |
| CN110038905A (en) * | 2018-01-15 | 2019-07-23 | 宝山钢铁股份有限公司 | A kind of variable step control method that roughing constant width machine is predicted based on slab head and tail width |
| CN109821901B (en) * | 2019-01-30 | 2021-06-22 | 北京首钢股份有限公司 | Variable-step-pitch head-tail width control method for fixed-width machine |
| CN110102579B (en) * | 2019-05-14 | 2020-03-31 | 鞍钢股份有限公司 | Low-cost control method for eliminating width of slab wedge |
| CN110508626B (en) * | 2019-07-23 | 2021-07-27 | 北京首钢股份有限公司 | Side press plate blank extrusion control method |
| CN113083908B (en) * | 2021-03-31 | 2022-11-22 | 北京首钢股份有限公司 | Method and device for controlling width of hot-rolled width-adjusted blank |
| CN114472509B (en) * | 2022-02-08 | 2024-01-09 | 南京钢铁股份有限公司 | Rolling method of wedge-shaped blank |
| CN114769323B (en) * | 2022-04-29 | 2023-10-27 | 马鞍山钢铁股份有限公司 | Control method for width precision of hot rolled strip steel |
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