CN107812792A - A kind of accuracy control method of wire and rod continuous rolling tension force - Google Patents
A kind of accuracy control method of wire and rod continuous rolling tension force Download PDFInfo
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- CN107812792A CN107812792A CN201710941767.8A CN201710941767A CN107812792A CN 107812792 A CN107812792 A CN 107812792A CN 201710941767 A CN201710941767 A CN 201710941767A CN 107812792 A CN107812792 A CN 107812792A
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- rolling
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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
- B21B37/48—Tension control; Compression control
Abstract
A kind of accuracy control method of wire and rod continuous rolling tension force, belongs to steel rolling process method and technology field, for accurately being controlled the tandem rolling tension force of Bar Wire Product.The present invention is added to the tandem rolling tension force of the quantitative control rolling line of velocity variable of first rolling mill using the change and unit of kink set process；The change of shape and rolling line head rolling mills are unloaded and velocity perturbation after completely band carries relatively searches out and a kind of quantitatively controls tandem rolling tension force optimum value to obtain method during the present invention covers from kink, it is possible to achieve the stabilization of the operation of rolling and product quality；The present invention realizes accurate control tandem rolling tension force from the change of kink shape and rolling mill speed change, can rational judgment tension force, and ensure precedent of the operation of rolling long period tension stability in the range of a minor fluctuations, can promote for a long time in Bar Wire Product actual production；The present invention can be used for instructing Rolling production, avoid the production accident because of the improper initiation of tension force and quality fluctuation, have good economic benefit and promotional value.
Description
Technical field
The present invention relates to a kind of accuracy control method of tandem rolling tension force in Bar Wire Product production process, belong to steel rolling process method
Technical field.
Background technology
In Bar Wire Product continuous rolling, the regulation of tension force is mainly become by master station operating personnel according to mill load electric current
Change, the change of adjustment of loop amount progress manual intervention, tandem rolling tension force is kept constant within the specific limits, realize the operation of rolling
It is stable and product quality dimensional accuracy constant.Traditional handicraft adjustment means are to be automatically controlled using head Minimal Tension or electric current
Comparison method carries out the tension force setting of just intermediate mill, and adjusting range fluctuation of the conventional method to tension force is larger, can not precisely sentence
Break and accurately optimum value is arrived in adjustment arrangement.Tandem rolling overtension or the too small stability that can all destroy production process, cause to connect
Roll relation be destroyed initiation break, the accident such as piling of steel, and baneful influence is produced to the life-span of guide and guard, roll, and then cause to produce
The surface quality and deteriorated dimensional accuracy of product, producing waste product causes to lose.But the control mode of manual intervention is difficult to avoid that and opened
Power adjustment control is improper, easily causes the generation of production accident and quality accident, it is therefore necessary to proposes a kind of Bar Wire Product production
The accuracy control method of middle tandem rolling tension force, lead rod wire steel rolling production process is used to refer to, avoided because of the improper initiation of tension force
Production accident and the generation of quality accident.
The content of the invention
Technical problem solved by the invention is to provide a kind of accuracy control method of wire and rod continuous rolling tension force, this control
Method can be used to refer to lead rod wire steel rolling production process, avoid because of the production accident and quality accident of the improper initiation of tension force
Generation.
Solve above-mentioned technical problem technical scheme be：
A kind of accuracy control method of wire and rod continuous rolling tension force, it acts change in shape and rolling line head rolling mills after covering using kink
Accumulative velocity variable keeps constant, specific steps to judge the size of rolling line tandem rolling tension force and be accurately controlled in certain limit
It is as follows：
A. kink set forms tension-free normal kink set type immediately after bar head bites downstream milling train, illustrates initial velocity
Setting is suitable；
B. the change and rolling mill speed change of kink set shape are examined during whole billet rolling, if afterbody set shape is abnormal
Rise then illustrates that upstream unit overtension needs to adjust；
If c. bar head forms tension loop after biting downstream milling train, by some time set shape revert to it is tension-free just
Normal kink, then it is relatively low to illustrate that initial velocity is set, no-station pole canopy could be realized by loop scanner automatically adjusting for a period of time
Rolling to milling train initial velocity, it is necessary to be adjusted；
If d. bar head forms piling of steel kink after biting downstream milling train, illustrate that initial velocity setting is higher, it is necessary to milling train
Initial velocity is adjusted；
If e. head bites downstream milling train moment formation piling of steel kink, kink shape becomes tension loop after the several seconds, then explanation is rolled
Machine driving motor dynamic characteristic is poor, it is necessary to which impact drop compensation is adjusted or motor drive characteristic is adjusted, drop
Low electromechanical shock prompt drop；
F. by above-mentioned adjustment, realize that each kink forms tension-free normal kink simultaneously immediately after rolled piece bites downstream frame
Shape is kept constant during whole billet rolling；
G. compare the idle running of rolling line head rolling mills and the speed difference progress rolling line entirety tension value school after set is played with rolling line whole kink
Test, the speed fluctuation that first rolling mill idle running is risen after covering stabilization with all kinks of rolling line should mean within 5% more than 5%
All fronts overtension, mean that rolling line quality plays pendulum more than 10%.
The accuracy control method of above-mentioned wire and rod continuous rolling tension force, the set type of the normal kink is in for kink peak lives
The direction of the center vertical line deviation upstream milling train of set inlet and outlet pressure roller distance, positioned at loop-rising roll right（With in face of milling train fore side,
From left to right, roughing mill is exemplified by upstream stand to rolled piece traffic direction）, kink peak and kink are imported and exported in pressure roller distance
The distance L reference values of heart vertical line are 0.5-1.2 times of loop-rising roll diameter value, and normal kink is shaped as preferable set type, in stabilization
Micro- identical tension or tension-free state, and the buffer capacity with certain redundancy metal.
The accuracy control method of above-mentioned wire and rod continuous rolling tension force, the set type of the piling of steel kink is located at for kink peak lives
Outside the center vertical line of set inlet and outlet pressure roller distance, downstream milling train direction is inclined to, the looper height of piling of steel kink is too high, in not
Stable state, without the buffering leeway of redundancy metal.
The accuracy control method of above-mentioned wire and rod continuous rolling tension force, the set type of kink also have critical kink, the work of critical kink
Set peak is in the center vertical line centre position of kink inlet and outlet pressure roller distance, and critical looper height is higher, can keep nothing
Tension stability rolls, and redundancy metal buffering leeway is less than normal.
The accuracy control method of above-mentioned wire and rod continuous rolling tension force, the set type of the tension loop are in for kink peak
Cover directly over roller, form an oblique pull triangle kink, tension loop is in hightension state, forms drawing steel rolling, tension force
Loop-rising roll height can decline when serious bigger than normal, i.e., loop-rising roll causes loop-rising roll to rise to by the downward component compacting of tension force
Position.
The accuracy control method of above-mentioned wire and rod continuous rolling tension force, first rolling mill idle running and all work of rolling line in the step g
If the speed fluctuation after set is stable follows the steps below adjustment more than 10%：
H. according to the principle from upstream stand downstream frame adjustment, the tandem rolling tension force of thick intermediate mill is adjusted, method is extensive
The electric current comparison method of application, compares this rolling mill and stings steel back loading electric current and next rolling mill and bite back loading curent change, becomes
Change amount should be 3%-8%；
I. thick intermediate mill adjustment finishes, and check each kink plays set action and shape in set；
J. according to step b, c, d, e method, the reference speed of kink upstream stand is adjusted, the shape of each kink is being played set
Moment just stablizes in normal kink state；
K. checking that first rolling mill idle running plays the speed fluctuation after set stabilization with all kinks of rolling line, this time difference value should decline,
5%-10% requirement, repeat step h-j, until after the idle running of first rolling mill and rolling line all kinks set are stable can not such as be met
The speed fluctuation meets to require, reaches unit tandem rolling tension force and be in best stabilized state.
The accuracy control method of above-mentioned wire and rod continuous rolling tension force, it is necessary to accurate control rolled piece material type, check that rolled piece material type exists
Speed adjustment can be just carried out in the range of allowable error, such as the overproof necessary first specification material type of material type, then carries out speed regulation again.
The accuracy control method of above-mentioned wire and rod continuous rolling tension force, the temperature of whole steel billet must assure that one in the operation of rolling
Cause, the head of steel billet, the middle fluctuation with afterbody should be within 30 DEG C.
The accuracy control method of above-mentioned wire and rod continuous rolling tension force, in tension adjustment stages, it is necessary to since first rolling mill
Downstream frame is adjusted by sortie.
The beneficial effects of the invention are as follows：
The change of shape and the zero load of rolling line head rolling mills and all fronts are with the velocity perturbation after carrying during the present invention covers from kink
Compare and search out a kind of method for quantitatively controlling tandem rolling tension force optimum value, it is possible to achieve the stabilization of the operation of rolling and product quality.
The present invention can be used to refer to wire bar Rolling production, avoid triggering production accident and quality thing because tandem rolling tension adjustment is improper
Therefore.
Method provided by the invention can be with the tension force during precise rolling control, so that the operation of rolling is stable, product
Steady quality, the production accident because of tension force initiation out of control and mass defect can be greatly lowered, effectively improve the work of production line
Industry rate, lumber recovery simultaneously reduce burnup power consumption, can create huge economic results in society.
The present invention changes this angle from kink change in shape and rolling mill speed and realizes accurate control tandem rolling tension force, and realization can
Rational judgment tension force simultaneously ensures precedent of the operation of rolling long period tension stability in the range of a minor fluctuations, can promote for a long time
In Bar Wire Product actual production, there is boundless prospect for promotion and application.
Brief description of the drawings
Fig. 1 is the kink set shape change schematic diagram of the present invention；
Fig. 2 is the drive characteristic schematic diagram of the stand motor of the present invention.
Marked in figure as follows：Piling of steel kink 1, critical kink 2, normal kink 3, tension loop 4, rolling centerline 5, center
Vertical line 6, rolling direction 7, loop-rising roll 8.
Embodiment
The present invention bitten using kink after shape and the whole operation of rolling in change in shape carry out tension state
Judge and adjust.This method has broken the limitation for judging tension state with the value of kink joint debugging amount according to convention in the industry.
In actual production, if looper height is set with deviation, even if kink joint debugging amount is zero, it is also possible to company be present
Roll the possibility of overtension.The change of kink shape can accurately give expression to the size variation of tension force.Therefore need to observe
Kink plays the change procedure of shape after set.
It adds up velocity variable using the change in shape after kink set and rolling line head rolling mills and judges rolling line tandem rolling
The size of tension force is simultaneously accurately controlled in certain limit and keeps constant, comprises the following steps that：
First, after kink plays set, kink plays set formation no-station pole canopy kink set type immediately after kink head bites downstream milling train, then says
Bright initial velocity setting is suitable.
Further, the change and rolling mill speed change of kink set shape are examined during whole billet rolling.If tail
Portion's set shape rise extremely then illustrates that upstream unit overtension needs to adjust.
Further, if head forms tension loop after biting downstream milling train, nothing is reverted to by some time set shape
Power kink, then it is relatively low to illustrate that initial velocity is set, no-station pole canopy could be realized by loop scanner automatically adjusting for a period of time
Rolling to milling train initial velocity, it is necessary to be adjusted.
Further, if head forms piling of steel kink after biting downstream milling train, illustrate that initial velocity setting is higher, it is necessary to right
Milling train initial velocity is adjusted.
Further, if head bites downstream milling train moment and forms piling of steel kink, kink shape becomes tension loop after the several seconds,
Then illustrate that mill drive motor dynamics characteristic is poor, it is necessary to be adjusted to impact drop compensation or to the progress of motor drive characteristic
Adjustment, reduce electromechanical shock prompt drop.
Further, by above-mentioned adjustment, realize that each kink forms no-station pole canopy work immediately after rolled piece bites downstream frame
Cover and shape keeps constant during whole billet rolling.
Further, compare the idle running of rolling line head rolling mills and the speed difference progress rolling line after rolling line whole kink set is overall
Tension value verifies, and the speed fluctuation of the first rolling mill idle running with rolling line all kinks set after stable should be within 5%.It is more than
5% means all fronts overtension, means that rolling line quality plays pendulum more than 10%.
Fig. 1 shows that in above process, the method for judging kink set shape is as follows（With in face of milling train fore side, rolled piece operation
From left to right, roughing mill is exemplified by upstream stand in direction）：
Normal kink 3：
The center vertical line 6 that the set type of normal kink 3 is in kink inlet and outlet pressure roller distance for kink peak is inclined to upstream milling train
Direction, positioned at the right of loop-rising roll 8, the distance L reference values of kink peak and the center vertical line of kink inlet and outlet pressure roller distance
For the 0.5-1.2 times of diameter value of loop-rising roll 8, normal kink 3 is shaped as preferable set type, in stable micro- identical tension or no-station pole canopy shape
State, and the buffer capacity with certain redundancy metal.
Piling of steel kink 1：
The set type of piling of steel kink 1 is that kink peak is located at outside the center vertical line 6 that kink imports and exports pressure roller distance, is inclined to downstream
Milling train direction, the looper height of piling of steel kink 1 is too high, plays pendulum, without the buffering leeway of redundancy metal.
Critical kink 2：
The kink peak of critical kink 2 is in the centre position of center vertical line 6 of kink inlet and outlet pressure roller distance, critical kink 2
It is highly higher, no-station pole canopy stable rolling can be kept, it is less than normal that redundancy metal buffers leeway.
Tension loop 4：
The set type of tension loop 4 is that kink peak is in directly over loop-rising roll 8, forms an oblique pull triangle kink, tension force
Kink 4 is in hightension state, forms drawing steel rolling, and the height of loop-rising roll 8 can decline when tension force is seriously bigger than normal, i.e. loop-rising roll 8
Loop-rising roll 8 is caused to rise in place by the downward component compacting of tension force.
Fig. 2 is shown, in electric-motor drive performance plot, time t is milling train Biting Course, t1 stage milling train reductions of speed, in t2 ranks
Duan Huisheng, then velocity-stabilization, △ n are existing real impact reduction of speed value after stand motor impact drop compensation.
The present invention keeps the operation of rolling stable smooth operation of rolling line and product size precision to pay attention to the tension force of continuous rolling process
In a rational stability range.In order to reach tension force this purpose in accurate control continuous rolling process, it is necessary to from following
Several aspects are implemented：
Firstth, the optimization of motor drive characteristic
As shown in Fig. 2 △ n should be less than the 1% of motor actual speed, the duration should be less than 1 second.If △ n be more than 1%, or
Deceleration time is long；It is excessive to bite the metal cumulant of moment, the danger for biting piling of steel be present, must in order to eliminate this danger
Must reduce before rolling mill initial velocity, when its result causes to bite from cover, bite post-tensioning steel, adjustment of loop amount is bigger than normal；Finally
Cause finished size fluctuation substantially, i.e., head is big, and first part is less than normal, and middle normal, afterbody is bigger than normal.Thus, it is ensured that tension force
State, the drive characteristic of stand motor have to optimization in place, ensure that mill drive motor has enough rigidity.Process require that
Integrated value of the △ n values within the prompt drop time（Hatched area in Fig. 2）<0.5%/s.
Secondth, the accurate control of rolled piece material type
When carrying out tension adjustment according to this method, it is necessary to first check that rolled piece material type can just carry out speed tune in the range of allowable error
It is whole, such as the overproof necessary first specification material type of material type, speed regulation is then carried out again.
3rd, the stabilization of rolling temperature
The stabilization of this method meaning rolling temperature refers to that the temperature of whole steel billet must assure that unanimously, the fluctuation of afterbody among head
Should be within 30 DEG C.
4th, the accurate setting of looper height
Tandem rolling tension force is adjusted according to this method, the height of kink is set in a rational scope.Kink sets altitude datum
It is too high, 1 set of type of piling of steel kink shown in Fig. 1 occurs, kink setting height is too low, then kink " anti-tune " phenomenon occurs, i.e.,
In the case where there are 4 sets of types of tension loop, scanner feed back height h is still higher than setting height, now adjustment of loop program
Rolling mill rotating speed attempts to reduce looper height before being greatly lowered, can be by the position of loop-rising roll 8 if the pressure of loop-rising roll 8 is smaller
Force down, if the support force of loop-rising roll 8 is larger, tension force can be caused to steeply rise until the yield strength initiation that tension force is more than rolled piece is rolled
Part undergauge is until break.
5th, tension adjustment principle
According to this method, tension force manual intervention must comply with a principle：Downstream frame is adjusted by sortie since first rolling mill
It is whole.
6th, tension inspection method
By above-mentioned adjustment, realize that each kink forms no-station pole canopy kink and in whole steel immediately after rolled piece bites downstream frame
Shape is kept constant as shown in the normal shape of kink 3 in Fig. 1 in the base operation of rolling；It is complete with rolling line to compare the idle running of rolling line head rolling mills
Portion's kink acts the speed difference after covering and carries out the verification of rolling line entirety tension value, and first rolling mill idle running and rolling line all kinks set are steady
The speed fluctuation after fixed should be within 10%.If the numerical value more than 10%, follows the steps below adjustment：
（1）According to the principle from upstream stand downstream frame adjustment, the tandem rolling tension force of thick intermediate mill is adjusted, method is extensive
The electric current comparison method of application, compares this rolling mill and stings steel back loading electric current and next rolling mill and bite back loading curent change, becomes
Change amount should be 3%-8%.
（2）Thick intermediate mill adjustment finishes, and according to the method provided before the present invention, checks that the set that rises of each kink moves
Work and shape in set.
（3）Using method provided by the invention, the reference speed of kink upstream stand is adjusted, the shape of each kink is existed
Set moment is played just to stablize in normal kink state.
（4）Check that first rolling mill idle running plays the speed fluctuation after set stabilization with all kinks of rolling line；This time difference value should
Decline, can not such as meet 5%-10% requirement, repeat above-mentioned（1）-（3）Step, until the idle running of first rolling mill and all work of rolling line
The speed fluctuation after set is stable meets requirement, and now unit tandem rolling tension force is in best stabilized state.
Application example
Certain high-speed wire production line, overall import of the equipment with reducing-sizing mill rub root six generations high-speed rod producing line.Because of tension force
Alignment error is excessive, and product size fluctuation often occurs in production to be caused to produce batch waste product beyond national standard allowed band；
Once a steel billet occurred during tension adjustment substantial deviation normal range (NR) frequently to break in reducing-sizing mill, fracture quantity reaches
30-40, production is caused not continue.
After being adjusted by the method according to the present invention to looper height, reference speed, rolled piece temperature and material type, 20
Returned to normal production in minute, 1# milling trains are unloaded with being reduced to 8% from 20% with load velocity variable；Kink dimensionally stable is in set shape
3,；Product tensile phenomenon disappears, and dimensional accuracy reaches national standard B-C level standard levels.
Claims (9)
- A kind of 1. accuracy control method of wire and rod continuous rolling tension force, it is characterised in that：It plays the change in shape after set using kink Add up velocity variable with rolling line head rolling mills to judge the size of rolling line tandem rolling tension force and be accurately controlled in certain limit to protect Hold constant, comprise the following steps that：A. kink set forms tension-free normal kink set type immediately after bar head bites downstream milling train, illustrates initial velocity Setting is suitable；B. the change and rolling mill speed change of kink set shape are examined during whole billet rolling, if afterbody set shape is abnormal Rise then illustrates that upstream unit overtension needs to adjust；If c. bar head forms tension loop after biting downstream milling train, by some time set shape revert to it is tension-free just Normal kink, then it is relatively low to illustrate that initial velocity is set, no-station pole canopy could be realized by loop scanner automatically adjusting for a period of time Rolling to milling train initial velocity, it is necessary to be adjusted；If d. bar head forms piling of steel kink after biting downstream milling train, illustrate that initial velocity setting is higher, it is necessary to milling train Initial velocity is adjusted；If e. head bites downstream milling train moment formation piling of steel kink, kink shape becomes tension loop after the several seconds, then explanation is rolled Machine driving motor dynamic characteristic is poor, it is necessary to which impact drop compensation is adjusted or motor drive characteristic is adjusted, drop Low electromechanical shock prompt drop；F. by above-mentioned adjustment, realize that each kink forms tension-free normal kink simultaneously immediately after rolled piece bites downstream frame Shape is kept constant during whole billet rolling；G. compare the idle running of rolling line head rolling mills and the speed difference progress rolling line entirety tension value school after set is played with rolling line whole kink Test, the speed fluctuation that first rolling mill idle running is risen after covering stabilization with all kinks of rolling line should mean within 5% more than 5% All fronts overtension, mean that rolling line quality plays pendulum more than 10%.
- 2. the accuracy control method of wire and rod continuous rolling tension force according to claim 1, it is characterised in that：The normal kink Set type for kink peak be in kink and import and export the center vertical line of pressure roller distance and be inclined to the direction of upstream milling train, cover positioned at rising Roller right, the distance L reference values of kink peak and the center vertical line of kink inlet and outlet pressure roller distance are 0.5-1.2 times of loop-rising roll Diameter value, normal kink are shaped as preferable set type, in stable micro- identical tension or tension-free state, and have certain redundancy The buffer capacity of metal.
- 3. the accuracy control method of wire and rod continuous rolling tension force according to claim 1, it is characterised in that：The piling of steel kink Set type for kink peak be located at kink import and export pressure roller distance center vertical line outside, deviation downstream milling train direction, piling of steel The looper height of kink is too high, plays pendulum, without the buffering leeway of redundancy metal.
- 4. the accuracy control method of wire and rod continuous rolling tension force according to claim 1, it is characterised in that：The set type of kink is also There is critical kink, the kink peak of critical kink is in the center vertical line centre position of kink inlet and outlet pressure roller distance, critical Looper height is higher, can keep no-station pole canopy stable rolling, it is less than normal that redundancy metal buffers leeway.
- 5. the accuracy control method of wire and rod continuous rolling tension force according to claim 1, it is characterised in that：The tension loop Set type be in for kink peak directly over loop-rising roll, one oblique pull triangle kink of formation, tension loop is in hightension State, drawing steel rolling is formd, loop-rising roll height can decline when tension force is seriously bigger than normal, i.e., loop-rising roll is by the downward component pressure of tension force System causes loop-rising roll to rise in place.
- 6. the accuracy control method of wire and rod continuous rolling tension force according to claim 1, it is characterised in that：First frame in step g If milling train dallies, the speed fluctuation after set stabilization is played with all kinks of rolling line follows the steps below adjustment more than 10%：H. according to the principle from upstream stand downstream frame adjustment, the tandem rolling tension force of thick intermediate mill is adjusted, method is extensive The electric current comparison method of application, compares this rolling mill and stings steel back loading electric current and next rolling mill and bite back loading curent change, becomes Change amount should be 3%-8%；I. thick intermediate mill adjustment finishes, and check each kink plays set action and shape in set；J. according to step b, c, d, e method, the reference speed of kink upstream stand is adjusted, the shape of each kink is being played set Moment just stablizes in normal kink state；K. checking that first rolling mill idle running plays the speed fluctuation after set stabilization with all kinks of rolling line, this time difference value should decline, 5%-10% requirement, repeat step h-j, until after the idle running of first rolling mill and rolling line all kinks set are stable can not such as be met The speed fluctuation meets to require, reaches unit tandem rolling tension force and be in best stabilized state.
- 7. the accuracy control method of wire and rod continuous rolling tension force according to claim 6, it is characterised in that：Must accurately it control Rolled piece material type, check that rolled piece material type can just carry out speed adjustment in the range of allowable error, such as the overproof necessary first specification material of material type Type, speed regulation is then carried out again.
- 8. the accuracy control method of wire and rod continuous rolling tension force according to claim 7, it is characterised in that：It is whole in the operation of rolling The temperature of root steel billet must assure that unanimously the head of steel billet, the middle fluctuation with afterbody should be within 30 DEG C.
- 9. the accuracy control method of wire and rod continuous rolling tension force according to claim 8, it is characterised in that：In tension adjustment mistake Cheng Zhong, it is necessary to which downstream frame is adjusted by sortie since first rolling mill.
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| CN110280602A (en) * | 2019-07-19 | 2019-09-27 | 北京宇轩智能科技有限公司 | Intelligent steel rolling rolling assessment system and processing method extremely |
| CN111346924A (en) * | 2020-03-19 | 2020-06-30 | 首钢京唐钢铁联合有限责任公司 | Anti-pressing steel control method and device and strip steel finish rolling equipment |
| CN111618101A (en) * | 2020-06-29 | 2020-09-04 | 盐城市联鑫钢铁有限公司 | Rod splitting multi-line loop control system and control method |
| CN112934982A (en) * | 2021-03-24 | 2021-06-11 | 首钢长治钢铁有限公司 | Rolling tension adjusting method of rolling mill set and related equipment |
| CN113732080A (en) * | 2021-07-23 | 2021-12-03 | 阳春新钢铁有限责任公司 | Control system and method for looping head to get big loop |
| CN114749492A (en) * | 2022-05-20 | 2022-07-15 | 山东钢铁集团永锋临港有限公司 | Control method for improving rolling rhythm of high-speed bar production line |
| CN114769310A (en) * | 2022-02-28 | 2022-07-22 | 鞍钢股份有限公司 | Double-stand symmetrical reciprocating hot continuous rolling roughing mill and rolling method |
| CN114798725A (en) * | 2022-05-30 | 2022-07-29 | 重庆钢铁股份有限公司 | Bar and rolling method and rolling system thereof |
| CN117696623A (en) * | 2024-02-06 | 2024-03-15 | 福建建壹真空科技有限公司 | Metal strip rolling equipment and control method thereof |
| CN114769310B (en) * | 2022-02-28 | 2024-05-14 | 鞍钢股份有限公司 | Double-frame symmetrical reciprocating hot continuous rolling roughing mill and rolling method |
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