CN103372572A - Control method for improving rolling pace of roughing mill - Google Patents
Control method for improving rolling pace of roughing mill Download PDFInfo
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- CN103372572A CN103372572A CN2012101323877A CN201210132387A CN103372572A CN 103372572 A CN103372572 A CN 103372572A CN 2012101323877 A CN2012101323877 A CN 2012101323877A CN 201210132387 A CN201210132387 A CN 201210132387A CN 103372572 A CN103372572 A CN 103372572A
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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
Technical field
The present invention relates to a kind of control appliance or method that is specially adapted for rolling mill for metal or its converted products, relate in particular to and a kind ofly 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.At first according to rolling scaduled, with slab according to the order walking beam furnace Ht that packs into.Slab is heated to after the target temperature of process stipulation, by taking out the steel machine slab is extracted out successively, is placed on the charging roller table, and then hot slab is transported to the roughing unit.At the roughing unit, slab at first enters a De-scaling box D1 and carries out de-scaling, and then through making width of plate slab reach desired value after the heavy side press E1 side pressure, it is rolling to send into first frame of roughing R1 again, first frame of roughing R1 is two roller reversible milling trains, can rolling 1-3 passage.Then slab enters roughing the second frame, and roughing the second frame R2 is four-high reversing mill, can rolling 3-7 passage.After the roughing district is the intermediate blank of 38-60mm with the slab rolling of 200-250mm, it is delivered to mm finishing mill unit before.Intermediate blank enters after the mm finishing mill unit, excises through flying shear C1 to enter No. two De-scaling box D2 behind its head and carry out de-scaling.Become again the finished strip of 1.2-25.4mm thickness through mm finishing mill unit F1 tandem rolling.The band steel passes through follow-up cooling, coils into coil of strip after last frame of mm finishing mill unit.In process of production, last is left a certain frame with steel and arrives time interval of this frame with steel to rear one, is referred to as rolling rhythm.Two of front and back are shorter with the time interval between the steel, and the expression rolling rhythm is faster, and production efficiency is also higher.We become the bottleneck point of rolling rhythm to two of front and back with the most possible positions of bumping against of steel, namely before and after the afterbody, the position of head spacing minimum of two blocks of steel.
For construction land and the saving investment of dwindling factory building, newly-built roughing mill has replaced 4 frame arrangement forms with 2 frame arrangement forms at present.Rolling 1 passage of the first frame in 2 frames, the second frame is rolling 5 passages back and forth.Roughing mill the second frame is because rolling 5 passages back and forth, so roughing mill the second frame usually is the bottleneck point of the rolling rhythm of whole rolling line.
In the prior art, in order to accelerate the rolling rhythm of roughing the second frame, the technologist often adopts rolling replacement 5 passages of 3 passages rolling; Accelerate rolling rhythm by the method that improves the second frame mill speed; In addition the technologist also by shorten reversible passage when rolling throwing steel distance and accelerate the means such as setting speed, the dead time that shortens between passage is improved rolling rhythm.In the prior art, catch up with last block of band steel in order to prevent a rear band steel, between two blocks of band steel a safe distance is arranged before and after therefore must keeping.Can the first frame begin into steel rolling, and it is rolling to judge at first whether the second frame final pass has begun, if the second frame has begun to carry out the rolling of final pass, then the first frame can be advanced steel rolling, otherwise that the first frame does not allow is rolling.The control method of its prior art comprises the steps:
(1), when a rear band steel arrives the first frame entrance, judges at first whether the second frame has begun rolling final pass;
(2) if the second frame has begun rolling final pass, then the band steel of the first frame entrance can advance steel rolling;
(3) if the second frame does not also begin rolling final pass, then the band steel of the first frame entrance must stop to move ahead, and swings at inlet roller way with steel and waits for the instruction that can advance steel.
(4), the second frame begins rolling final pass, the band steel of the first frame entrance stops swinging, and starts to advance steel rolling.
Above prior art has following shortcoming:
(1) because mill capacity limits and the restriction of technological procedure, and a lot of kinds can't adopt 3 passages rolling or very high-speed rolling, 3 passages or high-speed rolling cause the second frame to jump the faults such as electric steel-fastening easily.
Maximum speed when (2) second frames are rolling can reach 6 meter per seconds, and the first frame mill speed is generally about 1 meter per second, even therefore two frames start simultaneously into steel rolling, rolling first frame that is through with of the second frame is also not rolling complete, the second frame is waited for the part-time that comprised in the rear time with steel when the first frame is rolling and is transported to time of the second frame from the first frame, delayed the rolling of the second frame.
(3) the first frame entrance swing with steel receive stop swinging, in the time of can advancing the instruction of steel, starting into steel from stopping swinging to needs the 1-2 delay in second, therefore cause the second frame and the first frame not to start simultaneously into steel rolling, 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) disclose the method that a kind of Medium and Heavy Plate Rolling Production line production process optimization is controlled, be particularly related 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 obtains respectively two stage rolling times that become two kinds of rolling mill practices in the rolling mill practice at first by the design of rolling schedule, and 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 first rolling sequence time and the second rolling sequence time, the first rolling sequence time of the second rolling mill practice and the relation between the second rolling sequence time and the time of staying temperature of the first rolling mill practice, rolling rhythm is produced in design.But the method is by controlling the time controlled rolling rhythm of each rolling sequence, because the length of each piece slab is uncertain in the actual production process, 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 purpose of this invention is to provide a kind of control method that improves the roughing mill rolling rhythm, carry out roller table speed grouping control in roller-way position in place end to end by detecting slab, relax the steel bar spare that advances of the first frame, thereby shorten the distance between adjacent two slabs, solve the technical problem that improves the roughing mill rolling rhythm.
The present invention solves the problems of the technologies described above the technical scheme that adopts:
A kind of control method that improves the roughing mill rolling rhythm, described roughing mill comprises the first frame and the second frame, between the first frame and the second frame, comprise some groups of roller-ways, processed one or two boards base, after rolling at least 1 passage of the first frame, by the described roller-way of respectively organizing, be transferred to the second frame from the first frame, and in the second frame rolling 3 passages back and forth, it is characterized in that:
At the described roller-way of respectively organizing slab head and slab tail checkout gear are set;
According to slab head and the slab tail signal of each the piece slab that detects, determine the seizure condition of the first frame and the second frame, determine roller-way number and idle roller-way number that each piece slab is shared;
If described respectively the group has the two boards base on the roller-way, then arrange and prevent that the slab impact conditions from being idle roller-way number 〉=1;
Roller-way number and the idle roller-way number shared according to seizure condition, each piece slab of the first frame and the second frame arrange the described control model of respectively organizing roller-way;
According to the described control model that prevents slab impact conditions and each group roller-way, the transmission speed of roller-way is respectively organized in control respectively, and control the startup of second block of slab and stop, make the distance minimization between first block of slab and the second block of slab, thereby the Transmission Time Interval between the two boards base is minimized.
A kind of better 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 and respectively to organize slab number on the 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 is stung steel, is made as the first frame synchronous mode to roller-way control;
S220) after the first frame is thrown steel, make slab base tail roller-way afterwards stop, all the other roller-ways are made as transmission mode;
S240) after the second frame is stung steel, the control of the roller-way before slab base tail and the base tail is made as the second frame synchronous mode;
S300) determine the roller-way control range of the first frame and the second frame;
S400) seizure condition of judgement the first frame if the first frame is in seizure condition, then is made as the first frame synchronous mode to the roller-way of the first mill stand control, and the roller-way of the second mill stand control is made as the second frame synchronous mode;
S500) judge the roller-way idle condition, if idle roller-way number＞1 then is made as the second frame synchronous mode to the roller-way of the second mill stand control, all the other roller-ways are made as transmission mode; If R2 throws steel, the slab number becomes 1, then is made as the switching controls pattern;
S600) if idle roller-way number＜1 then is made as the anticollision pattern, make the speed of the roller-way that second block of slab take=0;
S700) according to the control model of respectively organizing roller-way of above step setting, the transmission speed of roller-way is respectively organized in control, and control second block of slab and transmit forward or halt, thus controlled rolling rhythm.
A kind of better technical scheme 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) near one group of roller-way of the first frame, inquire about in turn from the first frame to the whole roller-ways of respectively organizing the second frame, detect slab head and the slab tail of second block of slab;
S320) if detect only have slab head signal, then mark the first frame is occupied state, the slab head place roller-way numbering of second block of slab of record; Otherwise mark the first frame is unoccupied state, the slab head of second block of slab of record and slab tail place roller-way numbering;
S330) number according to slab head and the slab tail place roller-way of second block of slab, calculate second block of slab and take the roller-way number, and increase one group of roller-way before the slab head as reserving roller-way, take roller-way in the lump as the roller-way control range of the second frame with second block of slab;
S340) near the end group roller-way of the second frame, backward is inquired about from the second frame to the whole roller-ways of respectively organizing the first frame, detects slab head and the slab tail of first block of slab;
S350) if detect only have slab tail signal, then mark the second frame is unoccupied state, the slab tail place roller-way numbering of first block of slab of record; Otherwise mark the second frame is occupied state; The slab head of first block of slab of record and slab tail place roller-way numbering;
S360) number according to slab head and the slab tail place roller-way of first block of slab, calculate first block of slab and take the roller-way number, if current rolling pass is for oppositely rolling, then increase one or more groups according to the expectation of first block of slab outlet length and reserve roller-way, 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 head place roller-way numbering of the slab tail of first block of slab and second block of slab, calculate the idle roller-way number between first block of slab and the second block of slab.
A kind of improved technical scheme 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 successively a roller-way, judge whether this roller-way belongs to respectively to organize effective roller-way among the roller-way between described the first frame and the second frame;
S720) if selected roller-way is made as the R2 synchronous mode, the speed that then should organize roller-way and the control of the second frame rolling mill practice is synchronous;
S730) if selected roller-way is made as the R1 synchronous mode, the speed that then should organize roller-way and the control of the first frame rolling mill practice is synchronous;
S740) if selected roller-way is made as transmission mode, then this group roller table speed is the slab transmission speed, if slab is organized roller-way by this fully, it is out of service then should to organize roller-way.
S750) if selected roller-way is made as the anticollision pattern, then this group roller-way stops operating.
S760) if selected roller-way is made as the switching controls pattern, then this roller table speed is selected slab transmission speed or out of service according to the control model of step 740.
The invention has the beneficial effects as follows:
Use the control method of raising roughing mill rolling rhythm of the present invention, can obviously shorten the spacing between the two blocks of processed slabs in front and back, frame is produced and is connected tightr before and after making, and can significantly improve rolling rhythm and the utilization rate of equipment and installations of milling train.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.
Description of drawings
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 that the control method of raising roughing mill rolling rhythm of the present invention is determined the roller-way control range;
Fig. 4 is that single slab is by the speed state of a control schematic diagram of roller-way;
Fig. 5 is that the two boards base is by the speed state of a control schematic diagram of roller-way;
Fig. 6 is slab head and the slab tail detected state schematic diagram that slab passes through the R1 frame;
Fig. 7 is slab head and the slab tail detected state schematic diagram that slab passes through the R2 frame;
Fig. 8 is the roller-way idle condition schematic diagram between the two boards base;
Fig. 9 is that the two boards base is by the control range schematic diagram of roller-way;
Figure 10 adopts the in process of production distance Curve figure between the front and back frame band steel of original control method;
Figure 11 adopts the in process of production distance Curve figure between the front and back frame band steel of method of the present invention.
Label among each figure is: the Ht-heating furnace, De-scaling box of D1-, the E1-heavy side press, R1-roughing the first frame, R2-roughing the second frame, the C1-flying shear, No. two De-scaling boxs of D2-, the F1-finishing mill, the transmission roller channel of Dx-heavy side press E1 to the first frame (x=1～n), (x=1～n), Hx-the second frame is to the runout table of flying shear (x=1～n) for the approach table of Gx-the first frame to the second frame.
The specific embodiment
In order to understand better technique scheme of the present invention, describe in detail further below in conjunction with drawings and Examples.
The control method of raising roughing mill rolling rhythm of the present invention, be used for the control of the roughing mill rolling rhythm of hot rolling line shown in Figure 1, roughing mill comprises the first frame R1 and the second frame R2, between the first frame R and the second frame R2, comprise some groups of roller-way Gx, X=1～8 in the embodiment of Fig. 4～shown in Figure 9 have 8 groups of roller-ways.Processed one or two boards base Bx (x=1 or 2), after rolling at least 1 passage of the first frame R1, by each group roller-way G1 to G8, be transferred to the second frame R2 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, the checkout gear of slab head and slab tail is set at each group roller-way Gx; According to slab head and the slab tail signal of each the piece slab that detects, determine the seizure condition of the first frame R1 and the second frame R2, determine roller-way number and idle roller-way number that each piece slab Bx is shared; If respectively organize two boards base B1 and B2 are arranged on the roller-way Gx, then arrange and prevent that the slab impact conditions from being idle roller-way number 〉=1; Then, roller-way number and the idle roller-way number shared according to seizure condition, slab B1 and the B2 of the first frame R1 and the second frame R2 arrange the control model of respectively organizing roller-way Gx; According to the described control model that prevents slab impact conditions and each group roller-way Gx, the transmission speed of roller-way Gx is respectively organized in control respectively, and control the startup of second slab B2 and stop, make the distance minimization between first slab B1 and the second slab B2, thereby the Transmission Time Interval between two boards base B1 and the B2 is minimized.
The control method of raising roughing mill rolling rhythm of the present invention the control flow schematic diagram as shown in Figure 2, comprise the following steps:
S100) judge and respectively to organize slab number on the 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 control is made as the first frame synchronous mode, roller table speed is identical with the speed of the first frame, shown in the Dn and G1～G8 of A figure among Fig. 4, wherein Dn is the end group approach table of contiguous the first frame;
S220) after the first frame R1 throws steel, making the base tail roller table speed afterwards of slab Bx is 0, and roller-way stops transmission, shown in the roller-way G1 of B figure among Fig. 4; All the other roller-ways are made as transmission mode, and roller table speed is transmission speed, shown in the roller-way G2～G8 of B figure among Fig. 4;
S240) after the second frame R2 stings steel, the control of the roller-way before the base tail of slab Bx and the base tail is made as the second frame synchronous mode, shown in the roller-way G7～G8 of C figure among Fig. 4;
S300) determine the roller-way control range of the first frame R1 and the second frame R2;
S400) judge the seizure condition of the first frame R1, if the first frame R1 is in seizure condition, then the roller-way of the first frame R1 control is made as the first frame synchronous mode, shown in Dn, the G5～G8 of Dn, the G4～G8 of A figure among Fig. 5 and B figure; The roller-way of the second frame R2 control is made as the second frame synchronous mode, and shown in G6～G8, the H1 of G5～G8, the H1 of A figure among Fig. 5 and B figure, wherein, H1 is first group of runout table of contiguous the second frame;
S500) judge the roller-way idle condition, if idle roller-way number＞1 then is made as the second frame synchronous mode to the roller-way of the second mill stand control, such as G6～G8 of G7, G8, H1 and the B figure of C figure among Fig. 5; All the other roller-ways are made as transmission mode, shown in the G2～G6 of C figure among Fig. 5; If R2 throws steel, the slab number becomes 1, then is made as the switching controls pattern, switches to the control model of 1 block of slab;
S600) if idle roller-way number＜1 then is made as the anticollision pattern, make the speed of the roller-way that second slab B2 take=0, stop second slab B2 and advance to prevent that two boards base B1 and B2 from bumping;
S700) according to the control model of respectively organizing roller-way Gx of above step setting, the transmission speed of roller-way Gx is respectively organized in control, and control second slab B2 and transmit forward or halt, thus controlled rolling rhythm.
The schematic flow sheet that the control method of raising roughing mill rolling rhythm of the present invention is determined the roller-way control range 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 as shown in Figure 3:
S310) near first group of roller-way G1 of the first frame R1, inquire about in turn from the first frame R1 to the whole roller-way G1 to G8 that respectively organize the second frame R2, detect slab head and slab tail near second slab B2 of the first frame R1;
S320) if detect only have slab head signal, then mark the first frame R1 is occupied state, the slab head place roller-way numbering of second slab B2 of record is shown in A figure among Fig. 6; Otherwise mark the first frame R1 is unoccupied state, and the slab head of second slab B2 of record and slab tail place roller-way numbering are shown in B figure and C figure among Fig. 6;
S330) number according to slab head and the slab tail place roller-way of second slab B2, calculate second slab B2 and take the roller-way number, and increase slab head one group of roller-way before as reserving roller-way, take roller-way in the lump as the roller-way control range of the first frame R1, shown in A figure among Fig. 9 with second slab B2; If the roller-way number at interval between two boards base B1 and the B2≤1 o'clock, control range are the roller-way at the slab tail place of G1 to the second slab B2 of first group of roller-way, shown in B figure among Fig. 9;
S340) near the end group roller-way G8 of the second frame R2, backward is inquired about from the second frame R2 to the whole roller-way G8 to G1 that respectively organize the first frame R1, detects slab head and slab tail near first slab B1 of the second frame R2;
S350) if detect only have slab tail signal, then mark the second frame R2 is occupied state, the slab tail place roller-way numbering of first slab B1 of record is shown in A figure among Fig. 7; Otherwise mark the second frame R2 is unoccupied state, and the slab head of first slab B1 of record and slab tail place roller-way numbering are shown in B figure and C figure among Fig. 7;
S360) number according to slab head and the slab tail place roller-way of first slab B1, calculate first slab B1 and take the roller-way number, if the current rolling pass of the second frame R2 is reverse rolling (even passage, be the m-1=4 passage in the present embodiment), then the expectation outlet length according to first slab B1 increases one or more groups reservation roller-way, take roller-way in the lump as the roller-way control range of the second frame R2, shown in A figure among Fig. 5 with first slab B1; If the current rolling pass of the second frame R2 is that forward is rolling, first slab B1 takies roller-way as the roller-way control range of the second frame R2, shown in B figure among Fig. 5;
S370) according to the slab head place roller-way numbering of the slab tail of first slab B1 and second slab B2, calculate the idle roller-way number between first slab B1 and the second slab B2.
According to an embodiment of the control method of raising roughing mill rolling rhythm of the present invention, described step S700 is according to the transmission speed of described each the roller-way Gx of following steps control:
S710) select successively a roller-way Gx, judge whether this roller-way belongs to respectively to organize effective roller-way among the roller-way between described the first frame R1 and the second frame R2;
S720) if selected roller-way Gx is made as the R2 synchronous mode, the speed that then should organize roller-way and the control of the second frame rolling mill practice is synchronous;
S730) if selected roller-way Gx is made as the R1 synchronous mode, the speed that then should organize roller-way and the control of the first frame rolling mill practice is synchronous;
S740) if selected roller-way Gx is made as transmission mode, then should organize roller-way and carry out the slab transmission speed, if slab is organized roller-way by this fully, it is out of service then should to organize roller-way.
S750) if selected roller-way Gx is made as the anticollision pattern, then this group roller-way stops operating.
S760) if selected roller-way Gx is made as the switching controls pattern, then this roller table speed switches to slab transmission speed or out of service according to the control model of step 740.
Implementation result compares:
The control method of raising roughing mill rolling rhythm of the present invention is used in Baosteel 1880 roughing, has received good effect, and rolling rhythm has improved nearly 20 seconds.Do not use before this method, in the production process before and after between frame band steel distance on 30 meters, as shown in figure 10.Use after the method for the present invention, in the production process before and after between frame band steel distance as shown in figure 11, minimum range shortens to 15 to 20 meters.Obviously shortened the spacing between the front and back band steel, frame is produced and is connected tightr before and after making.
Those of ordinary skill in the art will be appreciated that; above embodiment illustrates technical scheme of the present invention; and be not to be used as limitation of the invention; any variation, modification of the above embodiment being done based on connotation of the present invention all will drop in the protection domain of claim of the present invention.
Claims (4)
1. control method that improves the roughing mill rolling rhythm, described roughing mill comprises the first frame and the second frame, between the first frame and the second frame, comprise some groups of roller-ways, processed one or two boards base, after rolling at least 1 passage of the first frame, by the described roller-way of respectively organizing, be transferred to the second frame from the first frame, and in the second frame rolling 3 passages back and forth, it is characterized in that:
At the described roller-way of respectively organizing slab head and slab tail checkout gear are set;
According to slab head and the slab tail signal of each the piece slab that detects, determine the seizure condition of the first frame and the second frame, determine roller-way number and idle roller-way number that each piece slab is shared;
If described respectively the group has the two boards base on the roller-way, then arrange and prevent that the slab impact conditions from being idle roller-way number 〉=1;
Roller-way number and the idle roller-way number shared according to seizure condition, each piece slab of the first frame and the second frame arrange the described control model of respectively organizing roller-way;
According to the described control model that prevents slab impact conditions and each group roller-way, the transmission speed of roller-way is respectively organized in control respectively, and control the startup of second block of slab and stop, make the distance minimization between first block of slab and the second block of slab, thereby the Transmission Time Interval between the 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 and respectively to organize slab number on the 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 is stung steel, is made as the first frame synchronous mode to roller-way control;
S220) after the first frame is thrown steel, make slab base tail roller-way afterwards stop, all the other roller-ways are made as transmission mode;
S240) after the second frame is stung steel, the control of the roller-way before slab base tail and the base tail is made as the second frame synchronous mode;
S300) determine the roller-way control range of the first frame and the second frame;
S400) seizure condition of judgement the first frame if the first frame is in seizure condition, then is made as the first frame synchronous mode to the roller-way of the first mill stand control, and the roller-way of the second mill stand control is made as the second frame synchronous mode;
S500) judge the roller-way idle condition, if idle roller-way number＞1 then is made as the second frame synchronous mode to the roller-way of the second mill stand control, all the other roller-ways are made as transmission mode; If R2 throws steel, the slab number becomes 1, then is made as the switching controls pattern;
S600) if idle roller-way number＜1 then is made as the anticollision pattern, make the speed of the roller-way that second block of slab take=0;
S700) according to the control model of respectively organizing roller-way of above step setting, the transmission speed of roller-way is respectively organized in control, and control second block of slab and transmit forward 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) near one group of roller-way of the first frame, inquire about in turn from the first frame to the whole roller-ways of respectively organizing the second frame, detect slab head and the slab tail of second block of slab;
S320) if detect only have slab head signal, then mark the first frame is occupied state, the slab head place roller-way numbering of second block of slab of record; Otherwise mark the first frame is unoccupied state, the slab head of second block of slab of record and slab tail place roller-way numbering;
S330) number according to slab head and the slab tail place roller-way of second block of slab, calculate second block of slab and take the roller-way number, and increase one group of roller-way before the slab head as reserving roller-way, take roller-way in the lump as the roller-way control range of the second frame with second block of slab;
S340) near the end group roller-way of the second frame, backward is inquired about from the second frame to the whole roller-ways of respectively organizing the first frame, detects slab head and the slab tail of first block of slab;
S350) if detect only have slab tail signal, then mark the second frame is unoccupied state, the slab tail place roller-way numbering of first block of slab of record; Otherwise mark the second frame is occupied state; The slab head of first block of slab of record and slab tail place roller-way numbering;
S360) number according to slab head and the slab tail place roller-way of first block of slab, calculate first block of slab and take the roller-way number, if current rolling pass is for oppositely rolling, then increase one or more groups according to the expectation of first block of slab outlet length and reserve roller-way, 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 head place roller-way numbering of the slab tail of first block of slab and second block of slab, calculate the idle roller-way number between first block of slab and the second block of slab.
4. the control method of raising roughing mill rolling rhythm according to claim 2 is characterized in that described step S700 is according to the transmission speed of described each roller-way of following steps control:
S710) select successively a roller-way, judge whether this roller-way belongs to respectively to organize effective roller-way among the roller-way between described the first frame and the second frame;
S720) if selected roller-way is made as the R2 synchronous mode, the speed that then should organize roller-way and the control of the second frame rolling mill practice is synchronous;
S730) if selected roller-way is made as the R1 synchronous mode, the speed that then should organize roller-way and the control of the first frame rolling mill practice is synchronous;
S740) if selected roller-way is made as transmission mode, then this group roller table speed is the slab transmission speed, if slab is organized roller-way by this fully, it is out of service then should to organize roller-way.
S750) if selected roller-way is made as the anticollision pattern, then this group roller-way stops operating.
S760) if selected roller-way is made as the switching controls pattern, then this roller table speed is selected slab transmission speed or out of service according to the control model of step 740.
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| CN104785540A (en) * | 2014-01-21 | 2015-07-22 | 宝山钢铁股份有限公司 | Rolling efficiency improvement method suitable for five-stand cold continuous rolling units |
| 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 |
| 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 |
| CN106040749A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Rough rolling rhythm control method |
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