CN104209338A - Furnace plate blank correction control method based on width of plate blank - Google Patents
Furnace plate blank correction control method based on width of plate blank Download PDFInfo
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- CN104209338A CN104209338A CN201310210229.3A CN201310210229A CN104209338A CN 104209338 A CN104209338 A CN 104209338A CN 201310210229 A CN201310210229 A CN 201310210229A CN 104209338 A CN104209338 A CN 104209338A
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Abstract
The invention provides a furnace plate blank correction control method based on the width of a plate blank. According to the method, in an existing loaded steel advancing correction and location procedure, furnace plate blank correction and location control is carried out at different speeds according to materials of different specifications. The method is characterized in that loaded steel advancing correction speed is set according to the information, collected by an upper computer, of plate blank width W, and the mathematical algorithm for setting the loaded steel advancing correction speed is y = alpha + beta W, wherein y represents loaded steel correction speed, the unit of y is m/m, y is a dependent variable, W represents the plate blank width, the unit of W is mm, the W is an independent variable, alpha and beta are regression coefficients, the value of alpha ranges from -1150 to -1000, and the value of beta ranges from 2.3 to 2.5. According to the furnace plate blank correction control method based on the width of the plate blank, correction and location precision is improved, and therefore various performance indexes causing plate blank heating due to positional deviation of space between plate blanks in a furnace are reduces. Meanwhile, equipment safety is also guaranteed.
Description
Technical field
The invention belongs to heating furnace technical field of automatic control, particularly, the present invention relates to a kind of stove slab that enters based on width of plate slab and push away positive control method, is multiple speed-mode control method, according to the inventive method, realize slab stokehold dress steel and push away the control of positive accurate positioning.
Background technology
Due to the development of market economy, the requirement of user to steel sheet product quality is more and more higher, control to have higher requirement to Surface Defects in Steel Plate, higher challenge be it is also proposed to the heating requirements of heating furnace simultaneously, as slab heating temperature obtain uniformity, slab quantity, slab time inside furnace etc. in stove in the unit interval.
Wherein, in stove, the size in slab gap directly affects the various performance indications of heating of plate blank.At present, in order to reduce the blemish of the finished steel plate produced because of heating problems, need to be optimized slab gap in heating furnace to control research.Thus, make different size slab its slab gap under the prerequisite meeting technological requirement more reasonable, heating operation is more flexible, as required to slab spacing setting in stove, can have adjustability.
But, after operating personnel correctly set spacing, stove slab physical location can be entered in dress steel implementation toward contact and occur deviation.And this deviation comes from slab enters the accurate positioning that stokehold pushes away positive control and whether caused.
Slab enters stokehold and pushes away one of indispensable important step in Baosteel Heavy Plate Mill's heating furnace dress steel process just.At present, domestic and international slab heating furnace dress steel pushes away and just locates control model is carry out controlling with reference to the pattern of common hot-rolling heating furnace.That is, existing dress steel push away positive control method to all slabs to as if having employed same speed control mode.But, slab kind due to slab is more, and (slab width is diversified in specifications, namely slab pushes away and just locates inertia difference), slab pushes away timing and produces site error, when last block of slab is wider, when then one block of slab is narrower, often cause accurately to control slab spacing in stove, even occur that the superposition situation that in stove, rear one block of slab " is ridden " on last block of slab occurs.In addition, because the minimizing of slab spacing in stove also has influence on the various performance indications of heating of plate blank.Thus destruction is produced to this section equipment.
Summary of the invention
For overcoming the problems referred to above, the invention provides a kind of stove slab that enters based on width of plate slab and push away positive control method, pushed away and just located for filling steel in the past the situation that control rate only has a kind of Schema control, pass through Field Research, have employed the multiple speed-mode control method based on width of plate slab, realize thus pushing away the accurate control of just locating to slab stokehold dress steel.Thus reduce the various performance indications differences of the heating of plate blank caused because of slab spaced position deviation in stove.Meanwhile, also device security is guaranteed.
The process analysis procedure analysis of dress steel
(1) heating furnace dress steel technological process:
Baosteel Heavy Plate Mill's heating furnace fills steel technological process and controls the same with the pattern of most of common hot-rolling heating furnace.First, produce driving and carry out validation of information after slab storehouse boatswain chair base leaves charging roller in, be transported to automatic centering location before heating furnace door through charging roller table again, in time automatically filling steel conditions permit, the dress steel trip objective value according to calculating starts once to fill steel cloth.
(2) fill steel machine and push away positive principle analysis:
Heating furnace dress steel pushes away and fills essential step in steel process just, is the important component part of dress steel climb displacement.
Parameter declaration by reference to the accompanying drawings:
TAB_WIDTH, charging roller table width;
DIS_TAB_CORR, the distance that dress steel machine is cut somebody's hair between roller-way edge;
POL_LENGTH, dress steel machine push rod length;
CORR_F_CONST, pushes away positive advance constant;
CORR_F_DIS, pushes away positive forward stroke;
CORR_B_DIS, pushes away positive backward travel;
CORR_B_CONST, pushes away and just retreats constant;
CORR_B_FACT, pushes away and just retreats coefficient;
SLAB_WIDTH, width of plate slab;
SPACE_DIS, next cartridge plate base is apart from the distance of built-in beam afterbody;
SAG_DIS, the distance on built-in beam between last block slab to built-in beam afterbody;
SLAB_SPACE, slab gap in stove;
∑ Wb, step rate step pitch accumulation sum;
Under automatic mode controls, dress steel machine is by the slab after location, stokehold, utilizing dress steel machine to cut somebody's hair pushes away just according to calculating stroke by slab by stokehold slab, and retreat according to climb displacement, dress steel machine holds up slab again and rises, being sent into by slab in stove according to setting dress steel stroke and deposit on the built-in beam of step rate, dress steel machine, back to origin position, completes and once automatically fills steel process.
A. positive forward stroke (CORR_F_DIS) is pushed away
Dress steel machine pushes away positive forward stroke, immediate shipment steel machine advances slab distance from the place dress steel machine that roller-way shifts roll neck onto.Pushing away positive forward stroke actual is exactly that roller-way width adds that the distance of distance roller-way of cutting somebody's hair deducts the width of slab again, and in advance process, need deviation when considering band-type brake, pushes away positive advance constant so set.When fill steel machine traveled distance be greater than push away positive forward stroke time, push away positive forward motion and stop.
Push away positive forward stroke computing formula as follows: A=A1+A2-A3-A4
Parameter declaration in composition graphs:
A=CORR_F_DIS (pushing away positive forward stroke);
A1=TAB_WIDTH (charging roller table width);
A2=DIS_TAB_CORR (distance that dress steel machine is cut somebody's hair between roller-way edge);
A3=SLAB_WIDTH (width of plate slab);
A4=CORR_F_CONST (pushing away positive advance constant);
As shown in Figure 3.
Dress steel machine pushes away positive backward travel, and after immediate shipment steel machine pushes away and just advances and put in place, dress steel machine is back to the position apart from initial point.Pushing away positive backward travel actual is exactly push away positive forward stroke to deduct the distance pushing away and just retreat rear slab tail end distance and cut somebody's hair, and slab tail end is then that pusher front end is back to distance W/3-100 place, slab front end apart from the distance of cutting somebody's hair.
(3) steel machine automatic control flow chart is filled:
Baosteel 5m slab existing dress steel automatic control flow chart:
Whole course of action is once automatically fill steel process above, and can find out that original-pack steel pushes away positive speed is take same fixed speed control model.
Technical solution of the present invention is as follows:
The stove slab that enters based on width of plate slab pushes away a positive control method, and tie up to the advance of existing dress steel and push away in positive positioning process, the material according to different specification size carries out pushing away positive positioning control into stove slab with friction speed, it is characterized in that,
According to the width of plate slab W information that host computer gathers, setting dress steel advances and pushes away positive speed,
Setting dress steel pushes away positive speed mathematical algorithm and is: y=alpha+beta W,
In formula, y, dress steel pushes away positive speed, unit: m/m is dependent variable, W, width of plate slab, and unit: mm is independent variable,
α and β is regression coefficient, α and β span is respectively :-1150≤α≤-1000,2.3≤β≤2.5.
Push away positive control method according to a kind of stove slab that enters based on width of plate slab of the present invention, it is characterized in that, dimensions span 1300≤W≤2300 of slab W, unit: mm.
Positive control method is pushed away according to a kind of stove slab that enters based on width of plate slab of the present invention, it is characterized in that, adopt the speed governing of frequency converter, its transmission frequency conversion system parameter is decimal number, its transmission frequency conversion system parameter v meets following formula: y=alpha+beta W, α and β is regression coefficient, α and β span is respectively :-1150≤α≤-1000,2.3≤β≤2.5.
Push away positive control method according to a kind of stove slab that enters based on width of plate slab of the present invention, it is characterized in that, α and β be value-806.37 and 2.2967 respectively, namely
y=2.2967W-806.37。
Push away positive control method according to a kind of stove slab that enters based on width of plate slab of the present invention, it is characterized in that,
As 2100mm≤W, its transmission frequency conversion system parameter v is set as 4048≤v≤4200:
As 1900mm<W≤2100mm, its transmission frequency conversion system setting parameter is 3350≤v≤3500;
As 1700mm<W≤1900mm, its transmission frequency conversion system parameter v is set as 3000≤v≤3200;
W≤1700mm, its transmission frequency conversion system parameter v is set as 2024≤v≤2250.
Positive control method is pushed away according to a kind of stove slab that enters based on width of plate slab of the present invention, it is the quantitative relationship that foundation dress steel pushes away between positive speed from different width of plate slab variable that heating furnace dress steel pushes away positive speed mathematics setting model, calculates that the dress steel of different in width slab pushes away positive Speed Setting.Selected described transmission frequency conversion system parameter v, frequency converter can be automatically converted to the advance of required dress steel and push away positive speed y.
Therefore, the present invention both pushed away positive speed mathematical algorithm by setting dress steel: y=alpha+beta W, obtain the advance of required dress steel and push away positive speed y, also by selected described transmission frequency conversion system parameter v, obtain the advance of required dress steel and push away positive speed y, dress steel needed for frequency converter can be automatically converted to advances and pushes away positive speed y.
Push away positive control method according to a kind of stove slab that enters based on width of plate slab of the present invention, it is characterized in that,
As 2100mm≤W, its transmission frequency conversion system parameter v is set as 4048;
Work as 1900mm<W<2100mm, its transmission frequency conversion system setting parameter is 3350;
As 1700mm<W≤1900mm, its transmission frequency conversion system parameter v is set as 3000;
W≤1700mm, its transmission frequency conversion system parameter v is set as 2024.
Push away positive control method according to a kind of stove slab that enters based on width of plate slab of the present invention, it is characterized in that,
As 2100mm≤W, the advance of dress steel pushes away positive speed y and is set as 0.25 meter per second;
Work as 1900mm<W<2100mm, the advance of dress steel pushes away positive speed y and is set as 0.21 meter per second;
As 1700mm<W≤1900mm, the advance of dress steel pushes away positive speed y and is set as 0.20 meter per second;
W≤1700mm, the advance of dress steel pushes away positive speed y and is set as 0.12 meter per second.
The invention provides a kind of stove slab that enters based on width of plate slab and push away positive control method, tie up to the advance of existing dress steel and push away in positive positioning process, the material according to different specification size carries out pushing away positive positioning control into stove slab with friction speed, it is characterized in that,
According to the width of plate slab information that host computer gathers, setting dress steel advances and pushes away positive speed.
Positive control method is pushed away according to a kind of stove slab that enters based on width of plate slab of the present invention, it is characterized in that, it is the quantitative relationship that foundation dress steel pushes away between positive speed from different width of plate slab variable that heating furnace dress steel pushes away positive speed mathematics setting model, calculates that the dress steel of different in width slab pushes away positive Speed Setting.
Setting dress steel pushes away positive speed mathematical algorithm and is: y=alpha+beta W, and in formula, y(fills steel and pushes away positive speed) be dependent variable, W (width of plate slab) is independent variable, α and β is regression coefficient.
According to following regression algorithm, and in conjunction with on-the-spot different width of plate slab data, the dress steel analyzing them push away positive speed and plate wide between relation, realize dress steel and push away positive speed and width of plate slab control algolithm, specifically as Fig. 7.
According to above algorithm, and in conjunction with on-the-spot different width of plate slab data, the dress steel analyzing them push away positive speed and plate wide between relation, realize dress steel and push away positive speed control algorithm.
Automatic dress steel control flow of the invention process:
Parameter declaration:
1) dimensions span 1300≤W≤2300 of (width of plate slab W), unit: mm;
2) its transmission frequency conversion system parameter, is decimal number.Wherein 16384 is maximum, is also the 100% given of speed;
Filling steel electrical-mechanical driving arrangement in the present invention is the Engineering inverter adopting SIMOVERT MasterDrives Siemens Company, have concurrently VC (Vector Control: vector controlled) and MC (Motion Control: motion control. feature is high dynamic response, be applied to complicated motion sequence to control), belong to large-scale driving.
Relating to speed preset value in the present invention and relate to transmission frequency conversion system parameter, is decimal number, and wherein 16384 is maximum, is also the 100% given of speed, specifically as shown in Figure 6.
Essential electrical power-equipment involved by control technology of the present invention and Detection theory device:
A. filling steel machine is driven by variable-frequency motor, adjustable dress steel speeds control;
B. dress steel machine stroke and slab push away the detection of positive goal value is what to be realized by the incremental encoder be arranged on variable-frequency motor output shaft, and control accuracy is high, reliable and stable.
Positive control method is pushed away according to a kind of stove slab that enters based on width of plate slab provided by the invention, pushed away and just located for filling steel in the past the situation that control rate only has a kind of Schema control, pass through Field Research, have employed the multiple speed-mode control method based on width of plate slab, realize thus pushing away the accurate control of just locating to slab stokehold dress steel.Thus reduce the various performance indications differences of the heating of plate blank caused because of slab spaced position deviation in stove.Meanwhile, also device security is guaranteed.
Accompanying drawing explanation
Fig. 1 is heating furnace dress steel area schematic.
Fig. 2 is dress steel climb displacement schematic diagram.
Fig. 3 pushes away positive position schematic diagram for filling steel.
Fig. 4 is existing dress steel automatic control flow chart figure.
Fig. 5 is the automatic dress steel control flow chart after the invention process.
Fig. 6 is the given schematic diagram of SIEMENS S7-200 16 figure place system speed.
Fig. 7 pushes away positive speed and width of plate slab control algolithm schematic diagram for filling steel.
In figure, 1 is heating furnace, and 2 is heating furnace furnace wall, and 3 is discharging door, and 4 is dress steel machine, and 5 is charging roller table, and 6 is slab, and 7 is charging roller table roll neck.
In Fig. 2, chain double-dashed line; The right half part connected is the extension of its left-half.
Detailed description of the invention
Embodiment
The stove slab that enters based on width of plate slab pushes away a positive control method, and tie up to the advance of existing dress steel and push away in positive positioning process, the material according to different specification size carries out pushing away positive positioning control into stove slab with friction speed.Baosteel 5m slab plate dress steel machine is implemented.
First, according to the width of plate slab W information that host computer gathers, setting dress steel advances and pushes away positive speed,
Setting dress steel pushes away positive speed mathematical algorithm and is: y=alpha+beta W,
In formula, y, dress steel pushes away positive speed, unit: m/m is dependent variable, W, width of plate slab, and unit: mm is independent variable.α and β is regression coefficient.
According to the present invention, the dimensions span 1300≤W≤2300mm of slab W.
According to the embodiment of the present invention, adopt the speed governing of frequency converter, its transmission frequency conversion system parameter is decimal number, its transmission frequency conversion system parameter v meets following formula: y=alpha+beta W, α and β is regression coefficient, α and β span is respectively :-1150≤α≤-1000,2.3≤β≤2.5.
According to the present embodiment, preferably, α and β be value-806.37 and 2.2967 respectively, namely
y=2.2967W-806.37。
According to the present invention, as 2100mm≤W, described transmission frequency conversion system parameter v is set as 4048≤v≤4200:
As 1900mm<W≤2100mm, its transmission frequency conversion system setting parameter is 3350≤v≤3500;
As 1700mm<W≤1900mm, its transmission frequency conversion system parameter v is set as 3000≤v≤3200;
W≤1700mm, its transmission frequency conversion system parameter v is set as 2024≤v≤2250.
According to the present embodiment, as 2100mm≤W, its transmission frequency conversion system parameter v is set as 4048; Work as 1900mm<W<2100mm, its transmission frequency conversion system setting parameter is 3350; As 1700mm<W≤1900mm, its transmission frequency conversion system parameter v is set as 3000; W≤1700mm, its transmission frequency conversion system parameter v is set as 2024.
Dress steel after the invention process pushes away positive speed in table one.
Table one
In the present embodiment, the essential electrical power-equipment involved by control technology and Detection theory device as follows:
A. filling steel machine is driven by variable-frequency motor, adjustable dress steel speeds control;
B. dress steel machine stroke and slab push away the detection of positive goal value is what to be realized by the incremental encoder be arranged on variable-frequency motor output shaft, has control accuracy high, reliable and stable.
According to the present invention, the described material according to different specification size carries out pushing away positive position control method into stove slab with friction speed, improves and pushes away positive positioning precision, thus reduces the various performance indications of the heating of plate blank caused because of slab spaced position deviation in stove.Meanwhile, also ensure that device security.
Claims (7)
1. the stove slab that enters based on width of plate slab pushes away a positive control method, and tie up to the advance of existing dress steel and push away in positive positioning process, the material according to different specification size carries out pushing away positive positioning control into stove slab with friction speed, it is characterized in that,
According to the width of plate slab W information that host computer gathers, setting dress steel advances and pushes away positive speed,
Setting dress steel pushes away positive speed mathematical algorithm and is: y=alpha+beta W,
In formula, y, dress steel pushes away positive speed, unit: m/m is dependent variable, W, width of plate slab, and unit: mm is independent variable,
α and β is regression coefficient, α and β span is respectively :-1150≤α≤-1000,2.3≤β≤2.5.
2. a kind of stove slab that enters based on width of plate slab pushes away positive control method as claimed in claim 1, it is characterized in that, dimensions span 1300≤W≤2300 of slab W, unit: mm.
3. a kind of stove slab that enters based on width of plate slab pushes away positive control method as claimed in claim 1, it is characterized in that, adopt the speed governing of frequency converter, its transmission frequency conversion system parameter is decimal number, its transmission frequency conversion system parameter v meets following formula: y=alpha+beta W, α and β is regression coefficient, α and β span is respectively :-1150≤α≤-1000,2.3≤β≤2.5.
4. as described in claim 1 or 3, a kind of stove slab that enters based on width of plate slab pushes away positive control method, it is characterized in that, α and β be value-806.37 and 2.2967 respectively, namely
y=2.2967W-806.37。
5. a kind of stove slab that enters based on width of plate slab pushes away positive control method as claimed in claim 4, it is characterized in that,
As 2100mm≤W, its transmission frequency conversion system parameter v is set as 4048≤v≤4200:
As 1900mm<W≤2100mm, its transmission frequency conversion system setting parameter is 3350≤v≤3500;
As 1700mm<W≤1900mm, its transmission frequency conversion system parameter v is set as 3000≤v≤3200;
W≤1700mm, its transmission frequency conversion system parameter v is set as 2024≤v≤2250.
6. a kind of stove slab that enters based on width of plate slab pushes away positive control method as claimed in claim 5, it is characterized in that,
As 2100mm≤W, its transmission frequency conversion system parameter v is set as 4048;
Work as 1900mm<W<2100mm, its transmission frequency conversion system setting parameter is 3350;
As 1700mm<W≤1900mm, its transmission frequency conversion system parameter v is set as 3000;
W≤1700mm, its transmission frequency conversion system parameter v is set as 2024.
7. a kind of stove slab that enters based on width of plate slab pushes away positive control method as claimed in claim 5, it is characterized in that,
As 2100mm≤W, the advance of dress steel pushes away positive speed y and is set as 0.25 meter per second;
Work as 1900mm<W<2100mm, the advance of dress steel pushes away positive speed y and is set as 0.21 meter per second;
As 1700mm<W≤1900mm, the advance of dress steel pushes away positive speed y and is set as 0.20 meter per second;
W≤1700mm, the advance of dress steel pushes away positive speed y and is set as 0.12 meter per second.
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Cited By (2)
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| CN108004389A (en) * | 2016-10-31 | 2018-05-08 | 宝山钢铁股份有限公司 | A kind of method that slab cloth positioning can be carried out according to steel grade and trimmed size |
| CN108955289A (en) * | 2018-06-06 | 2018-12-07 | 日照钢铁控股集团有限公司 | A kind of steel loading position auto-correction method, device, storage equipment and storage medium |
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| CN108004389A (en) * | 2016-10-31 | 2018-05-08 | 宝山钢铁股份有限公司 | A kind of method that slab cloth positioning can be carried out according to steel grade and trimmed size |
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| CN108955289A (en) * | 2018-06-06 | 2018-12-07 | 日照钢铁控股集团有限公司 | A kind of steel loading position auto-correction method, device, storage equipment and storage medium |
| CN108955289B (en) * | 2018-06-06 | 2021-04-13 | 日照钢铁控股集团有限公司 | Automatic correction method and device for steel loading position, storage equipment and storage medium |
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