CN103372572B - Control method for improving rolling pace of roughing mill - Google Patents

Control method for improving rolling pace of roughing mill Download PDF

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Publication number
CN103372572B
CN103372572B CN201210132387.7A CN201210132387A CN103372572B CN 103372572 B CN103372572 B CN 103372572B CN 201210132387 A CN201210132387 A CN 201210132387A CN 103372572 B CN103372572 B CN 103372572B
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China
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roller
way
slab
frame
block
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CN201210132387.7A
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Chinese (zh)
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CN103372572A (en
Inventor
张仁其
陈琪
幸利军
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宝山钢铁股份有限公司
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Publication of CN103372572A publication Critical patent/CN103372572A/en
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Abstract

The invention discloses a control method for improving rolling pace of a roughing mill and relates to a control device or method which is specially applicable to a metal rolling mill or machined products of the metal rolling mill. Plate blank head and plate blank tail detection devices are arranged on all groups of roller beds; according to detected plate blank head and plate blank tail signals, plate blank collision prevention conditions are set, and the occupancy state of a rack and the number of the idle roller beds are determined; according to the occupancy state of the rack and the number of the idle roller beds, control modes of the groups of roller beds are set; according to the plate blank collision prevention conditions and the control modes of the groups of roller beds, transmission speeds of the groups of roller beds are controlled respectively, and starting and stopping of a second plate blank are controlled to minimize the distance between a first plate blank and the second plate blank, so that the transmission time interval between the two plate blanks is minimized. By the aid of the method, the distance between the two adjacent machined plate blanks can be greatly shortened, so that the front and back rack production is closely connected, and the rolling pace of the rolling mill and the device utilization rate can be greatly improved.

Description

A kind of control method improving roughing mill rolling rhythm
Technical field
The present invention relates to a kind of control appliance or the method that are specially adapted for rolling mill for metal or its converted products, particularly relate to one and carry out roller table speed grouping control in roller-way position in place end to end by detecting slab, improve the control method of roughing mill rolling rhythm.
Background technology
The operations such as the technological process of hot rolling line roughly has heating, roughing, finish rolling, batches, conveyer chain, finishing.First according to rolling scaduled, slab is loaded walking beam furnace Ht according to order.After slab is heated to the target temperature of process stipulation, extracted out successively by slab by taking out steel machine, be placed on charging roller table, then hot slab is transported to roughing mills.At roughing mills, first slab enters a De-scaling box D1 and carries out de-scaling, then after heavy side press E1 side pressure, makes width of plate slab reach desired value, then sends into roughing first frame R1 rolling, roughing first frame R1 is two roller reversible milling trains, can rolling 1-3 passage.Then slab enters roughing second frame, and roughing second frame R2 is four-high reversing mill, can rolling 3-7 passage.The slab rolling of 200-250mm is after the intermediate blank of 38-60mm by roughing district, before being delivered to mm finishing mill unit.After intermediate blank enters mm finishing mill unit, excise through flying shear C1 and enter No. two De-scaling box D2 after its head and carry out de-scaling.The finished strip of 1.2-25.4mm thickness is become again through mm finishing mill unit F1 tandem rolling.Band steel, after last frame of mm finishing mill unit, through follow-up cooling, coils into coil of strip.In process of production, last block of band steel leaves a certain frame arrives this frame time interval to rear one block of band steel, is referred to as rolling rhythm.The time interval between the band steel of two blocks, front and back is shorter, and represent that rolling rhythm is faster, production efficiency is also higher.We become the bottleneck point of rolling rhythm the band steel position of most possibly bumping against, two pieces, front and back, the position that the afterbody of two blocks of steel namely, head spacing are minimum.
In order to reduce construction land and the investment reduction of factory building, roughing mill newly-built at present instead of 4 frame arrangement forms with 2 frame arrangement forms.The first frame rolling 1 passage in 2 frames, the second frame is rolling 5 passage back and forth.Roughing mill second frame is due to rolling 5 passage back and forth, and therefore roughing mill second frame is usually the bottleneck point of the rolling rhythm of whole rolling line.
In the prior art, in order to accelerate the rolling rhythm of roughing second frame, technologist often adopts 3 passes to replace 5 passes; Rolling rhythm is accelerated by the method improving the second frame mill speed; Technologist also accelerates the means such as setting speed by throwing steel Distance geometry when shortening reversible passes in addition, and the dead time shortened between passage improves rolling rhythm.In the prior art, in order to prevent rear one block of band steel from catching up with last block of band steel, two pieces, front and back therefore must be kept to be with between steel a safe distance.Can the first frame start into steel rolling, and first must judge whether the second frame final pass starts rolling, if the second frame has started the rolling carrying out final pass, then the first frame can enter steel rolling, otherwise the first frame does not allow rolling.The control method of its prior art comprises the steps:
(1), rear one block of band steel is when arriving the first frame entrance, first judges whether the second frame has started rolling final pass;
(2) if the second frame has started rolling final pass, then the band steel of the first frame entrance can enter steel rolling;
(3) if the second frame does not also start rolling final pass, then the band steel of the first frame entrance must stop moving ahead, and band steel swings the instruction waiting for entering steel on inlet roller way.
(4), the second frame starts rolling final pass, and the band steel of the first frame entrance stops swinging, and starts into steel rolling.
Above prior art has following shortcoming:
(1) because mill capacity limits and the restriction of technological procedure, a lot of kind cannot adopt 3 passes or very high-speed rolling, and 3 passages or high-speed rolling easily cause the second frame to jump the faults such as electric steel-fastening.
Maximum speed during (2) second frame rolling can reach 6 meter per seconds, and the first frame mill speed is generally about 1 meter per second, even if therefore two frames start into steel rolling simultaneously, second frame rolling finishes the first frame, and also non-rolling is complete, second frame waits for rear one piece of time of being with in the time of steel part-time when including the first frame rolling and being transported to the second frame from the first frame, has delayed the rolling of the second frame.
(3) first frame entrance swing band steel when receiving the instruction of the steel that stops swinging, can enter, the delay needing 1-2 second into steel is started from stopping swinging to, therefore cause the second frame and the first frame not to start into steel rolling simultaneously, but delay to some extent, this has delayed again the rolling of the second frame.
Chinese invention patent application " a kind of optimization method of rolling rhythm of single-stand four-high rolling mill " (number of patent application: 200910092664.4 publication numbers: CN101658870) discloses a kind of method that Medium and Heavy Plate Rolling Production line production process optimization controls, in particular to a kind of optimization method of rolling rhythm of single-stand four-high rolling mill, belong to steel plate rolling process control technology field.The present invention is first by the design of rolling schedule, and obtain two stage rolling times of the two kinds of rolling mill practices become in rolling mill practice respectively, the first rolling sequence time of the first rolling mill practice is longer than the first rolling sequence time of the second rolling mill practice; Then judge the relation between the first rolling sequence time of the first rolling mill practice and the second rolling sequence time, the first rolling sequence time of the second rolling mill practice and the second rolling sequence time and time of staying temperature, rolling rhythm is produced in design.But the method is the time controlled rolling rhythm by controlling each rolling sequence, and because in actual production process, the length of each block slab is uncertain, the method is not suitable for existing roughing production line, can not overcome the shortcoming of above-mentioned prior art.
Summary of the invention
The object of this invention is to provide a kind of control method improving roughing mill rolling rhythm, roller table speed grouping control is carried out in roller-way position in place end to end by detecting slab, that relaxes the first frame enters steel bar part, thus the distance shortened between adjacent two slabs, solve the technical problem improving roughing mill rolling rhythm.
The present invention solves the problems of the technologies described above adopted technical scheme:
A kind of control method improving roughing mill rolling rhythm, described roughing mill comprises the first frame and the second frame, some groups of roller-ways are comprised between the first frame and the second frame, processed one piece or two boards base, after the first frame rolling at least 1 passage, by each group of described roller-way, be transferred to the second frame from the first frame, and in the second frame rolling 3 passage back and forth, it is characterized in that:
Each group of described roller-way arranges slab head and slab tail checkout gear;
According to slab head and the slab tail signal of each the block slab detected, determine the seizure condition of the first frame and the second frame, determine each roller-way number shared by block slab and idle roller-way number;
If each group of described roller-way has two boards base, then arrange and prevent slab impact conditions from being idle roller-way number >=1;
Roller-way number shared by the seizure condition of the first frame and the second frame, each block slab and idle roller-way number, arrange the control model of described each group of roller-way;
According to the described control model preventing slab impact conditions and each group of roller-way, control the transmission speed of each group of roller-way respectively, and control startup and the stopping of second block of slab, make the distance minimization between first block of slab and second block of slab, thus the Transmission Time Interval between two boards base is minimized.
The one preferably technical scheme of the control method of raising roughing mill rolling rhythm of the present invention, is characterized in that comprising the following steps:
S100) judge the slab number on each group of roller-way between the first frame and the second frame, if slab number=2, then forward step S300 to;
S200) if slab number=1, then after the first frame stings steel, roller-way is controlled to be set to the first frame synchronous mode;
S220) after the first frame throws steel, make the roller-way after slab base tail stop, all the other roller-ways are set to transmission mode;
S240) after the second frame stings steel, the roller-way before slab base tail and base tail is controlled to be set to the second frame synchronous mode;
S300) the roller-way control range of the first frame and the second frame is determined;
S400) judge the seizure condition of the first frame, if the first frame is in seizure condition, then the roller-way of the first mill stand control is set to the first frame synchronous mode, the roller-way of the second mill stand control is set to the second frame synchronous mode;
S500) judge roller-way idle condition, if idle roller-way number > 1, then the roller-way of the second mill stand control is set to the second frame synchronous mode, all the other roller-ways are set to transmission mode; If the second frame throws steel, slab number becomes 1, be then set to switching control model;
S600) if idle roller-way number < 1, then anticollision pattern is set to, speed=0 of the roller-way making second block of slab take;
The control model of each group of roller-way S700) arranged according to above step, controls the transmission speed of each group of roller-way, controls second piece of slab onwards transmission or halt, thus controlled rolling rhythm.
The better technical scheme of one of the control method of raising roughing mill rolling rhythm of the present invention, is characterized in that described step S300 comprises following action:
S310) from one group of roller-way near the first frame, whole inquiring about in turn from the first frame to the second frame respectively organize roller-way, the slab head of detection second block of slab and slab tail;
S320) if detect only have slab head signal, then marking the first frame is occupied state, the slab head place roller-way numbering of record second block of slab; Otherwise marking the first frame is unoccupied state, the slab head of record second block of slab and slab tail place roller-way numbering;
S330) according to slab head and the slab tail place roller-way numbering of second block of slab, calculate second block of slab and take roller-way number, and the one group of roller-way increased before slab head is as reserved roller-way, take roller-way in the lump as the roller-way control range of the second frame with second block of slab;
S340) from the end group roller-way near the second frame, backward inquiry from the second frame to the first frame all respectively organize roller-way, the slab head of detection first block of slab and slab tail;
S350) if detect only have slab tail signal, then marking the second frame is unoccupied state, the slab tail place roller-way numbering of record first block of slab; Otherwise marking the second frame is occupied state; The slab head of record first block of slab and slab tail place roller-way numbering;
S360) according to slab head and the slab tail place roller-way numbering of first block of slab, calculate first block of slab and take roller-way number, if current rolling pass is reverse rolling, then increase one or more groups reserved roller-way according to the expectation outlet length of first block of slab, take roller-way in the lump as the roller-way control range of the first frame with first block of slab;
S370) according to the slab tail of first block of slab and the slab head place roller-way numbering of second block of slab, the idle roller-way number between first block of slab and second block of slab is calculated.
The technical scheme of a kind of improvement of the control method of raising roughing mill rolling rhythm of the present invention, is characterized in that described step S700 controls the transmission speed of described each roller-way according to following steps:
S710) select a roller-way successively, judge the effective roller-way among each group of roller-way whether this roller-way belongs between the first described frame and the second frame;
S720) if selected roller-way is set to the second frame synchronous mode, then the speed sync that controls of this group roller-way and the second frame rolling mill practice;
S730) if selected roller-way is set to the first frame synchronous mode, then the speed sync that controls of this group roller-way and the first frame rolling mill practice;
S740) if selected roller-way is set to transmission mode, then this group roller table speed is slab transmission speed, if slab is completely by this group roller-way, then this group roller-way is out of service;
S750) if selected roller-way is set to anticollision pattern, then this group roller-way stops operating;
S760) if selected roller-way is set to switching control model, then this roller table speed is according to the control model of step 740, selects slab transmission speed or out of service.
The invention has the beneficial effects as follows:
Use the control method of raising roughing mill rolling rhythm of the present invention, obviously can shorten the spacing between the processed slab in two blocks, front and back, make front and back frame faces replacement more tight, rolling rhythm and the utilization rate of equipment and installations of milling train can be significantly improved.According to measured data, the minimum spacing between the slab of front and back can shorten 15 to 20 meters, and rolling rhythm can improve nearly 20 seconds.
Accompanying drawing explanation
Fig. 1 is the roughing apparatus arrangement schematic diagram of hot rolling line;
Fig. 2 is the control flow schematic diagram of the control method of raising roughing mill rolling rhythm of the present invention;
Fig. 3 is the schematic flow sheet of the control method determination roller-way control range of raising roughing mill rolling rhythm of the present invention;
Fig. 4 is the speeds control view of single slab by roller-way;
Fig. 5 is the speeds control view of two boards base by roller-way;
Fig. 6 is slab by the slab head of R1 frame and slab tail detected state schematic diagram;
Fig. 7 is slab by the slab head of R2 frame and slab tail detected state schematic diagram;
Fig. 8 is the roller-way idle condition schematic diagram between two boards base;
Fig. 9 is the control range schematic diagram of two boards base by roller-way;
Figure 10 adopts the distance Curve figure of original control method in process of production between front and back frame band steel;
Figure 11 adopts the distance Curve figure of method of the present invention in process of production between front and back frame band steel.
Label in each figure is: Ht-heating furnace, D1-De-scaling box, E1-heavy side press, R1-roughing first frame, R2-roughing second frame, C1-flying shear, D2-No. bis-De-scaling boxs, F1-finishing mill, the transmission roller channel (x=1 ~ n) of Dx-heavy side press E1 to the first frame, the approach table (x=1 ~ n) of Gx-first frame to the second frame, Hx-second frame is to the runout table (x=1 ~ n) of flying shear.
Detailed description of the invention
In order to technique scheme of the present invention can be understood better, describe in detail further below in conjunction with drawings and Examples.
The control method of raising roughing mill rolling rhythm of the present invention, for the control of the roughing mill rolling rhythm of hot rolling line shown in Fig. 1, roughing mill comprises the first frame R1 and the second frame R2, some groups of roller-way Gx are comprised between the first frame R and the second frame R2, X=1 ~ 8 in the embodiment shown in Fig. 4 ~ Fig. 9, have 8 groups of roller-ways.Processed one piece or two boards base Bx (x=1 or 2), after the first frame R1 rolling at least 1 passage, by each group of roller-way G1 to G8, the second frame R2 is transferred to from the first frame R1, and in the second frame R2 rolling m passage back and forth, wherein, m is odd number and m >=3, in the present embodiment, m=5.According to embodiment of the present invention, each group of roller-way Gx arranges the checkout gear of slab head and slab tail; According to slab head and the slab tail signal of each the block slab detected, determine the seizure condition of the first frame R1 and the second frame R2, determine the roller-way number shared by each block slab Bx and idle roller-way number; If each group roller-way Gx has two boards base B1 and B2, then arrange and prevent slab impact conditions from being idle roller-way number >=1; Then, the roller-way number shared by the seizure condition of the first frame R1 and the second frame R2, slab B1 and B2 and idle roller-way number, arrange the control model of each group of roller-way Gx; According to the described control model preventing slab impact conditions and each group of roller-way Gx, control the transmission speed of each group of roller-way Gx respectively, and control startup and the stopping of second piece of slab B2, make the distance minimization between first piece of slab B1 and second piece slab B2, thus the Transmission Time Interval between two boards base B1 and B2 is minimized.
The control method of raising roughing mill rolling rhythm of the present invention control flow schematic diagram as shown in Figure 2, comprise the following steps:
S100) judge the slab number on each group of roller-way Gx between the first frame R1 and the second frame R2, if slab number=2, then forward step S300 to;
S200) if slab number=1, then after the first frame R1 stings steel, roller-way Gx is controlled to be set to the first frame synchronous mode, and roller table speed is identical with the speed of the first frame, as shown in Dn and the G1 ~ G8 of A figure in Fig. 4, wherein Dn is the end group approach table of contiguous first frame;
S220) after the first frame R1 throws steel, make the roller table speed after the base tail of slab Bx be 0, roller-way stops transmission, as shown in the roller-way G1 of B figure in Fig. 4; All the other roller-ways are set to transmission mode, and roller table speed is transmission speed, as shown in the roller-way G2 ~ G8 of B figure in Fig. 4;
S240) after the second frame R2 stings steel, the roller-way before the base tail of slab Bx and base tail is controlled to be set to the second frame synchronous mode, as shown in the roller-way G7 ~ G8 of C figure in Fig. 4;
S300) the roller-way control range of the first frame R1 and the second frame R2 is determined;
S400) judge the seizure condition of the first frame R1, if the first frame R1 is in seizure condition, then the roller-way that the first frame R1 controls is set to the first frame synchronous mode, as shown in Dn, G5 ~ G8 of Dn, the G4 ~ G8 and B figure of A figure in Fig. 5; The roller-way that second frame R2 controls is set to the second frame synchronous mode, and as shown in G6 ~ G8, the H1 of the G5 ~ G8 of A figure in Fig. 5, H1 and B figure, wherein, H1 is first group of runout table of contiguous second frame;
S500) judge roller-way idle condition, if idle roller-way number > 1, then the roller-way of the second mill stand control is set to the second frame synchronous mode, as the G6 ~ G8 of G7, G8, H1 and B figure of C figure in Fig. 5; All the other roller-ways are set to transmission mode, as shown in the G2 ~ G6 of C figure in Fig. 5; If R2 throws steel, slab number becomes 1, be then set to switching control model, is switched to the control model of 1 block of slab;
S600) if idle roller-way number < 1, be then set to anticollision pattern, speed=0 of the roller-way making second piece of slab B2 take, stop second piece of slab B2 to advance to prevent two boards base B1 and B2 from colliding;
The control model of each group of roller-way Gx S700) arranged according to above step, controls the transmission speed of each group of roller-way Gx, controls second piece of slab B2 onwards transmission or halt, thus controlled rolling rhythm.
The schematic flow sheet of the control method determination roller-way control range of raising roughing mill rolling rhythm of the present invention as shown in Figure 3, above-mentionedly determines that the step S300 of the roller-way control range of the first frame R1 and the second frame R2 comprises following action:
S310) from first group of roller-way G1 near the first frame R1, inquire about in turn from the whole each group roller-way G1 to G8 the first frame R1 to the second frame R2, detect the slab head near second piece of slab B2 of the first frame R1 and slab tail;
S320) if detect only have slab head signal, then marking the first frame R1 is occupied state, and the slab head place roller-way numbering of record second piece of slab B2, as shown in A figure in Fig. 6; Otherwise marking the first frame R1 is unoccupied state, the slab head of record second piece of slab B2 and slab tail place roller-way numbering, as shown in B figure and C figure in Fig. 6;
S330) according to slab head and the slab tail place roller-way numbering of second piece of slab B2, calculate second piece of slab B2 and take roller-way number, and the one group of roller-way increased before slab head is as reserved roller-way, roller-way is taken in the lump as the roller-way control range of the first frame R1, as shown in A figure in Fig. 9 with second piece of slab B2; If between two boards base B1 and B2 during roller-way number≤1 at interval, control range is the roller-way at the slab tail place of first group of roller-way G1 to second piece of slab B2, as shown in B figure in Fig. 9;
S340) from the end group roller-way G8 near the second frame R2, backward inquiry, from the whole each group roller-way G8 to G1 the second frame R2 to the first frame R1, detects the slab head near first piece of slab B1 of the second frame R2 and slab tail;
S350) if detect only have slab tail signal, then marking the second frame R2 is occupied state, and the slab tail place roller-way numbering of record first piece of slab B1, as shown in A figure in Fig. 7; Otherwise marking the second frame R2 is unoccupied state, the slab head of record first piece of slab B1 and slab tail place roller-way numbering, as shown in B figure and C figure in Fig. 7;
S360) according to slab head and the slab tail place roller-way numbering of first piece of slab B1, calculate first piece of slab B1 and take roller-way number, if the current rolling pass of the second frame R2 is reverse rolling (even passage, be m-1=4 passage in the present embodiment), then increase one or more groups reserved roller-way according to the expectation outlet length of first piece of slab B1, roller-way is taken in the lump as the roller-way control range of the second frame R2, as shown in A figure in Fig. 5 with first piece of slab B1; If the current rolling pass of the second frame R2 is forward rolling, first piece of slab B1 takies the roller-way control range of roller-way as the second frame R2, as shown in B figure in Fig. 5;
S370) according to the slab tail of first piece of slab B1 and the slab head place roller-way numbering of second piece of slab B2, the idle roller-way number between first piece of slab B1 and second piece of slab B2 is calculated.
According to an embodiment of the control method of raising roughing mill rolling rhythm of the present invention, described step S700 controls the transmission speed of described each roller-way Gx according to following steps:
S710) select a roller-way Gx successively, judge the effective roller-way among each group of roller-way whether this roller-way belongs between the first described frame R1 and the second frame R2;
S720) if selected roller-way Gx is set to R2 synchronous mode, then the speed sync that controls of this group roller-way and the second frame rolling mill practice;
S730) if selected roller-way Gx is set to R1 synchronous mode, then the speed sync that controls of this group roller-way and the first frame rolling mill practice;
S740) if selected roller-way Gx is set to transmission mode, then this group roller-way performs slab transmission speed, if slab is completely by this group roller-way, then this group roller-way is out of service.
S750) if selected roller-way Gx is set to anticollision pattern, then this group roller-way stops operating.
S760) if selected roller-way Gx is set to switching control model, then this roller table speed is according to the control model of step 740, switches to slab transmission speed or out of service.
Implementation result compares:
The control method of raising roughing mill rolling rhythm of the present invention uses in Baosteel 1880 roughing, and have received good effect, rolling rhythm improves nearly 20 seconds.Before not using this method, before and after in production process, frame band steel spacing is on 30 meters, as shown in Figure 10.After using method of the present invention, before and after in production process, as shown in figure 11, minimum range shortens to 15 to 20 meters to frame band steel spacing.Obviously shorten the spacing between front and back band steel, make front and back frame faces replacement tightr.
Those of ordinary skill in the art will be appreciated that; above embodiment is only used to technical scheme of the present invention is described; and be not used as limitation of the invention; any the above embodiment is done based on connotation of the present invention change, modification, all will drop in the protection domain of claim of the present invention.

Claims (4)

1. one kind is improved the control method of roughing mill rolling rhythm, described roughing mill comprises the first frame and the second frame, some groups of roller-ways are comprised between the first frame and the second frame, processed one piece or two boards base, after the first frame rolling at least 1 passage, by each group of described roller-way, be transferred to the second frame from the first frame, and in the second frame rolling 3 passage back and forth, it is characterized in that:
Each group of described roller-way arranges slab head and slab tail checkout gear;
According to slab head and the slab tail signal of each the block slab detected, determine the seizure condition of the first frame and the second frame, determine each roller-way number shared by block slab and idle roller-way number;
If each group of described roller-way has two boards base, then arrange and prevent slab impact conditions from being idle roller-way number >=1;
Roller-way number shared by the seizure condition of the first frame and the second frame, each block slab and idle roller-way number, arrange the control model of described each group of roller-way;
According to the described control model preventing slab impact conditions and each group of roller-way, control the transmission speed of each group of roller-way respectively, and control startup and the stopping of second block of slab, make the distance minimization between first block of slab and second block of slab, thus the Transmission Time Interval between two boards base is minimized.
2. the control method of raising roughing mill rolling rhythm according to claim 1, is characterized in that comprising the following steps: S100) judge between the first frame and the second frame each group of roller-way on slab number, if slab number=2, then forward step S300 to;
S200) if slab number=1, then after the first frame stings steel, roller-way is controlled to be set to the first frame synchronous mode;
S220) after the first frame throws steel, make the roller-way after slab base tail stop, all the other roller-ways are set to transmission mode;
S240) after the second frame stings steel, the roller-way before slab base tail and base tail is controlled to be set to the second frame synchronous mode;
S300) the roller-way control range of the first frame and the second frame is determined;
S400) judge the seizure condition of the first frame, if the first frame is in seizure condition, then the roller-way of the first mill stand control is set to the first frame synchronous mode, the roller-way of the second mill stand control is set to the second frame synchronous mode;
S500) judge roller-way idle condition, if idle roller-way number > 1, then the roller-way of the second mill stand control is set to the second frame synchronous mode, all the other roller-ways are set to transmission mode; If the second frame throws steel, slab number becomes 1, be then set to switching control model;
S600) if idle roller-way number < 1, then anticollision pattern is set to, speed=0 of the roller-way making second block of slab take;
The control model of each group of roller-way S700) arranged according to above step, controls the transmission speed of each group of roller-way, controls second piece of slab onwards transmission or halt, thus controlled rolling rhythm.
3. the control method of raising roughing mill rolling rhythm according to claim 2, is characterized in that described step S300 comprises following action:
S310) from one group of roller-way near the first frame, whole inquiring about in turn from the first frame to the second frame respectively organize roller-way, the slab head of detection second block of slab and slab tail;
S320) if detect only have slab head signal, then marking the first frame is occupied state, the slab head place roller-way numbering of record second block of slab; Otherwise marking the first frame is unoccupied state, the slab head of record second block of slab and slab tail place roller-way numbering;
S330) according to slab head and the slab tail place roller-way numbering of second block of slab, calculate second block of slab and take roller-way number, and the one group of roller-way increased before slab head is as reserved roller-way, take roller-way in the lump as the roller-way control range of the second frame with second block of slab;
S340) from the end group roller-way near the second frame, backward inquiry from the second frame to the first frame all respectively organize roller-way, the slab head of detection first block of slab and slab tail;
S350) if detect only have slab tail signal, then marking the second frame is unoccupied state, the slab tail place roller-way numbering of record first block of slab; Otherwise marking the second frame is occupied state; The slab head of record first block of slab and slab tail place roller-way numbering;
S360) according to slab head and the slab tail place roller-way numbering of first block of slab, calculate first block of slab and take roller-way number, if current rolling pass is reverse rolling, then increase one or more groups reserved roller-way according to the expectation outlet length of first block of slab, take roller-way in the lump as the roller-way control range of the first frame with first block of slab;
S370) according to the slab tail of first block of slab and the slab head place roller-way numbering of second block of slab, the idle roller-way number between first block of slab and second block of slab is calculated.
4. the control method of raising roughing mill rolling rhythm according to claim 2, is characterized in that described step S700 controls the transmission speed of described each roller-way according to following steps:
S710) select a roller-way successively, judge the effective roller-way among each group of roller-way whether this roller-way belongs between the first described frame and the second frame;
S720) if selected roller-way is set to the second frame synchronous mode, then the speed sync that controls of this group roller-way and the second frame rolling mill practice;
S730) if selected roller-way is set to the first frame synchronous mode, then the speed sync that controls of this group roller-way and the first frame rolling mill practice;
S740) if selected roller-way is set to transmission mode, then this group roller table speed is slab transmission speed, if slab is completely by this group roller-way, then this group roller-way is out of service;
S750) if selected roller-way is set to anticollision pattern, then this group roller-way stops operating;
S760) if selected roller-way is set to switching control model, then this roller table speed is according to the control model of step 740, selects slab transmission speed or out of service.
CN201210132387.7A 2012-04-28 2012-04-28 Control method for improving rolling pace of roughing mill CN103372572B (en)

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CN104785540B (en) * 2014-01-21 2017-05-31 宝山钢铁股份有限公司 A kind of rolling efficiency method for improving for being suitable for five Stands Cold Tandem Mill groups
CN105710135A (en) * 2014-12-01 2016-06-29 鞍钢股份有限公司 Free rolling control method for two rough rolling mills
CN105234184A (en) * 2015-11-10 2016-01-13 内蒙古包钢钢联股份有限公司 Steel pilling-up protective method for serial type rolling mill
CN106040749B (en) * 2016-06-21 2018-06-22 首钢京唐钢铁联合有限责任公司 A kind of roughing mill pace control method
CN108856306B (en) * 2018-06-25 2020-02-11 中冶京诚工程技术有限公司 Head-to-tail continuous steel feeding rolling method and system
CN109647900B (en) * 2019-01-02 2020-01-14 北京科技大学设计研究院有限公司 Speed control method of short-distance double-rack roughing mill in multiple pass distribution modes
CN110586661B (en) * 2019-08-09 2020-12-18 柳州钢铁股份有限公司 Gapless rolling control method
CN110773570B (en) * 2019-09-20 2021-03-19 南京钢铁股份有限公司 Method for improving rolling rhythm of 5m rolling mill
CN110814022B (en) * 2019-10-28 2021-03-23 北京科技大学设计研究院有限公司 Automatic control method for front roller way of 5-level 3-vertical roughing mill set

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