CN103447309A - Control method for steel throwing distance of hot rolling reversible roughing mill - Google Patents
Control method for steel throwing distance of hot rolling reversible roughing mill Download PDFInfo
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- CN103447309A CN103447309A CN201310395237XA CN201310395237A CN103447309A CN 103447309 A CN103447309 A CN 103447309A CN 201310395237X A CN201310395237X A CN 201310395237XA CN 201310395237 A CN201310395237 A CN 201310395237A CN 103447309 A CN103447309 A CN 103447309A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000002441 reversible effect Effects 0.000 title claims abstract description 16
- 238000005098 hot rolling Methods 0.000 title claims abstract description 14
- 230000003111 delayed effect Effects 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 5
- 230000001133 acceleration Effects 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 230000033764 rhythmic process Effects 0.000 abstract description 5
- 238000005507 spraying Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 1
- 238000005498 polishing Methods 0.000 abstract 1
- 238000003801 milling Methods 0.000 description 17
- 238000007689 inspection Methods 0.000 description 7
- 239000007921 spray Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The invention discloses a control method of steel throwing distance of a hot rolling reversible roughing mill, belonging to the field of metallurgical industry and comprising the following steps: a. selecting i from the secondary acquisition pass, and executing the step b if i is less than or equal to 6; if i is equal to 7, the seventh-pass steel polishing procedure is executed and then the process is finished; otherwise, ending the flow; b. setting the steel throwing speed per pass to be VPGiAssigning the steel throwing speed corresponding to the i pass to a variable VPGi(ii) a c. By the formula VTSi=VPGi+VCObtaining i-pass delayed parking speed VTSi(ii) a d. By the formula Ti=Si/VTSiObtaining the i-pass steel throwing delay time Ti(ii) a e. Acquiring the i-pass actual steel throwing distance Xi=Si+STi. The method ensures that the actual steel throwing distance of the plate blank is accurately controlled in the effective range of the hot detection before the rolling mill and the reverse water spraying after the rolling mill, improves the rolling rhythm of a rough rolling area, and avoids the driving heavy fault alarm and the accident that the plate blank cannot be normally rolled.
Description
Technical field
The present invention relates to metallurgical industry field, particularly relate to the control method that the reversible roughing mill of a kind of hot rolling is thrown the steel distance.
Background technology
Roughing mill is the visual plant of hot rolling line, and by strange, the even passage control to roughing mill, (strange passage rolling direction is the finishing mill direction; Even passage rolling direction is the heating furnace direction), slab rolling is become to intermediate slab thickness, then sending into the finishing mill rolling is finished strip.
Hot rolling roughing district flat roll mill generally comprises two roller roughing mills (called after R1) and four-high rougher (called after R2); The R1 milling train is in upstream, and the R2 milling train is in downstream; The roller-way of connection and inlet roller way etc. are arranged before R1; R1 outlet roller-way is arranged between R1 and R2 milling train, connect roller-way, R2 inlet roller way etc.; There is the outlet roller-way at the R2 rear portion and is connected roller-way etc. with the finish rolling district; R1 and R2 are reversible roughing mills, and the roughing mill top working roll is connected with upper motor; Bottom working roll is connected with lower motor.By the motion of motor forward and backward, drive roughing mill slab is carried out to reversible rolling.From secondary, provide data processing model and functional mode to send control command to one-level process control computer PLC, one-level provides that process is electric, the direct control of hydraulic pressure and pneumatic actuator realizes the automatic control to roughing mill.What secondary was the most frequently used to the control of roughing mill is the 1+7 control model, that is: R1 rolling 1 passage, R2 rolling 7 passages.The control command that secondary sends to one-level partly comprises: passage is selected I, every time biting speed, mill speed, throwing steel speed etc.
Cause throwing steel when the throwing steel of roughing mill distance often improves because of flat roll mill speed at present excessively far away, cause the passage of milling train long interval time, had a strong impact on the rolling rhythm in roughing zone; Perhaps, because cause the slab heat inspection before and after roughing mill of not dishing out during the Speed Reduction of flat roll mill, cause program can't arrive next step, normally rolling of slab, had a strong impact on carrying out smoothly of mill milling, must change the control method of throwing steel distance.
Summary of the invention
In view of this, the object of the present invention is to provide and a kind ofly guarantee that the actual throwing of slab steel distance accurately is controlled at before milling train after heat inspection and milling train in the effective range of contrary water spray.
The invention provides the reversible roughing mill of a kind of hot rolling and throw the control method of steel distance, comprising:
A, obtain passage from secondary and select i, if i is less than or equal to 6 execution step b; If i equals 7 carry out after the 7th passage is thrown the steel program and finish; Otherwise process ends;
B, every time is set, and to throw steel speed be V
pGi, by the throwing steel speed assignment issued from secondary of corresponding i passage to variable V
pGi;
C, by formula V
tSi=V
pGi+ V
cobtain i passage delayed shutdown speed V
tSi, wherein, V
cfixing velocity constant, V
c=0.5m/s;
D, by formula T
i=S
i/ V
tSiobtain the i passage and throw steel delay time T
i, wherein, S
ithat the i passage is thrown steel time delay distance constant;
E, obtain the actual throwing of i passage steel distance X
i=S
i+ S
ti, wherein, S
tithe distance that when expression speed becomes 0 speed from delayed shutdown speed, slab is walked, S
ti=V
tSi 2/ 2a, a is acceleration, a=1.14m/s
2.
The reversible roughing mill of hot rolling provided by the invention is thrown the control method of steel distance, by calculating, first draws every time delayed shutdown speed V
tsi, then set the throwing steel time delay distance constant of the first passage to the six passages, according to formula T
i=S
i/ V
tSi, calculate the throwing steel delay time of the first passage to the six passages, finally calculate the actual throwing of the first passage to the six passage steel distance.The method has guaranteed that the actual throwing of slab steel distance accurately is controlled at before milling train after heat inspection and milling train in the effective range of contrary water spray, has effectively improved the rolling rhythm in roughing zone, has avoided the heavy fault alarm of transmission and the slab can't normally rolling accident.
The accompanying drawing explanation
Speed, time and position view that Fig. 1 is strange passage rolling in the embodiment of the present invention;
Fig. 2 throws the control method flow chart of steel distance for the reversible roughing mill of hot rolling that the embodiment of the present invention provides;
The schematic diagram that Fig. 3 is roughing mill rolled slab in the embodiment of the present invention.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail.
The reversible roughing mill of the hot rolling that the embodiment of the present invention provides is thrown the control method of steel distance, by calculating, first draws every time delayed shutdown speed V
tsi(position of the actual throwing of corresponding milling train steel point as shown in Figure 1), then set the throwing steel time delay distance constant of the first passage to the six passages, is respectively S
1, S
2, S
3, S
4, S
5, S
6, according to formula T
i=S
i/ V
tSi, the throwing steel delay time that calculates the first passage to the six passages is T
1, T
2, T
3, T
4, T
5, T
6, finally calculate the actual throwing of the first passage to the six passage steel distance X
1, X
2, X
3, X
4, X
5, X
6.The method has guaranteed that the actual throwing of slab steel distance accurately is controlled at before milling train after heat inspection and milling train in the effective range of contrary water spray, has effectively improved the rolling rhythm in roughing zone, has avoided the heavy fault alarm of transmission and the slab can't normally rolling accident.
Fig. 2 throws the control method flow chart of steel distance for the reversible roughing mill of hot rolling that the embodiment of the present invention provides, and comprises the following steps:
Fig. 3 is four-high mill R2 schematic diagram, and wherein HMD is the heat inspection, and schematic diagram is mainly showed the front heat inspection of R2 and the rear distance against water spray to R2, and slab is thrown steel end position, odd even passage direction in the odd even passage.
The present embodiment has guaranteed the actual throwing of slab steel apart from the contrary effective range of spraying water after heat inspection before accurately being controlled at milling train and milling train, and the time shorten of roughing mill rolling 5 passages has arrived the 73s left and right, effectively raises the rolling rhythm in roughing zone.In the prior art, it is fixed constant that strange passage is thrown steel time delay distance constant, that is: S
1=S
3=S
5=C, because every time throws steel speed difference, cause throwing steel apart from difference, also do not consider in addition S
ti, therefore cause and throw the steel distance, in like manner even passage is also like this.And, based on the present embodiment, surveying the original 5 passages throwing steel times is 90s, be 73s now.
In a word, the foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (3)
1. the control method of the reversible roughing mill throwing of a hot rolling steel distance, is characterized in that, comprising:
A, obtain passage from secondary and select i, if i is less than or equal to 6 execution step b; If i equals 7 carry out after the 7th passage is thrown the steel program and finish; Otherwise process ends;
B, every time is set, and to throw steel speed be V
pGi, by the throwing steel speed assignment issued from secondary of corresponding i passage to variable V
pGi;
C, by formula V
tSi=V
pGi+ V
cobtain i passage delayed shutdown speed V
tSi, wherein, V
cfixing velocity constant, V
c=0.5m/s;
D, by formula T
i=S
i/ V
tSiobtain the i passage and throw steel delay time T
i, wherein, S
ithat the i passage is thrown steel time delay distance constant;
E, obtain the actual throwing of i passage steel distance X
i=S
i+ S
ti, wherein, S
tithe distance that when expression speed becomes 0 speed from delayed shutdown speed, slab is walked, S
ti=V
tSi 2/ 2a, a is acceleration, a=1.14m/s
2.
2. the reversible roughing mill of hot rolling according to claim 1 is thrown the control method of steel distance, it is characterized in that, the described steel speed assignment of throwing is to variable V
pGistep specifically comprise:
Every time speed array that is handed down to one-level by one-level to secondary while finishing is obtained.
3. the reversible roughing mill of hot rolling according to claim 2 is thrown the control method of steel distance, it is characterized in that described S
iestablishing method be:
The throwing steel time delay distance constant of the 1st passage to the 6 passages is respectively S
1, S
2, S
3, S
4, S
5, S
6, wherein, S
1=4000mm, S
2=6200mm, S
3=3800mm, S
4=6000mm, S
5=3600mm, S
6=5800mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310395237XA CN103447309A (en) | 2013-09-03 | 2013-09-03 | Control method for steel throwing distance of hot rolling reversible roughing mill |
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|---|---|---|---|
| CN201310395237XA CN103447309A (en) | 2013-09-03 | 2013-09-03 | Control method for steel throwing distance of hot rolling reversible roughing mill |
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| CN103447309A true CN103447309A (en) | 2013-12-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111706A (en) * | 2016-06-21 | 2016-11-16 | 山东钢铁股份有限公司 | A kind of hot rolling roller-way fragment delay parking method |
| CN110586658A (en) * | 2019-09-27 | 2019-12-20 | 北京科技大学设计研究院有限公司 | Control method for shortening rolling pass interval time of reversible roughing mill |
| CN113857263A (en) * | 2021-10-29 | 2021-12-31 | 山信软件股份有限公司 | Method and device for controlling speed of steel plate after steel throwing |
| CN113909298A (en) * | 2021-09-24 | 2022-01-11 | 江苏省沙钢钢铁研究院有限公司 | Steel plate hot rolling mill train and control method of steel throwing distance thereof |
| CN113996654A (en) * | 2020-07-28 | 2022-02-01 | 宝山钢铁股份有限公司 | Operation control method of roughing mill |
Citations (3)
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|---|---|---|---|---|
| US4294094A (en) * | 1979-02-24 | 1981-10-13 | Nippon Kokan Kabushiki Kaisha | Method for automatically controlling width of slab during hot rough-rolling thereof |
| JPH0739916A (en) * | 1993-07-29 | 1995-02-10 | Nippon Steel Corp | Estimation controller for slip using laser speed meter in hot rough rolling |
| CN101219437A (en) * | 2008-01-23 | 2008-07-16 | 广州珠江钢铁有限责任公司 | Plate strip hot mill rolling sequencing control method |
-
2013
- 2013-09-03 CN CN201310395237XA patent/CN103447309A/en active Pending
Patent Citations (3)
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|---|---|---|---|---|
| US4294094A (en) * | 1979-02-24 | 1981-10-13 | Nippon Kokan Kabushiki Kaisha | Method for automatically controlling width of slab during hot rough-rolling thereof |
| JPH0739916A (en) * | 1993-07-29 | 1995-02-10 | Nippon Steel Corp | Estimation controller for slip using laser speed meter in hot rough rolling |
| CN101219437A (en) * | 2008-01-23 | 2008-07-16 | 广州珠江钢铁有限责任公司 | Plate strip hot mill rolling sequencing control method |
Non-Patent Citations (4)
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111706A (en) * | 2016-06-21 | 2016-11-16 | 山东钢铁股份有限公司 | A kind of hot rolling roller-way fragment delay parking method |
| CN110586658A (en) * | 2019-09-27 | 2019-12-20 | 北京科技大学设计研究院有限公司 | Control method for shortening rolling pass interval time of reversible roughing mill |
| CN110586658B (en) * | 2019-09-27 | 2020-09-11 | 北京科技大学设计研究院有限公司 | Control method for shortening rolling pass interval time of reversible roughing mill |
| CN113996654A (en) * | 2020-07-28 | 2022-02-01 | 宝山钢铁股份有限公司 | Operation control method of roughing mill |
| CN113996654B (en) * | 2020-07-28 | 2024-03-08 | 宝山钢铁股份有限公司 | Operation control method of roughing mill |
| CN113909298A (en) * | 2021-09-24 | 2022-01-11 | 江苏省沙钢钢铁研究院有限公司 | Steel plate hot rolling mill train and control method of steel throwing distance thereof |
| CN113909298B (en) * | 2021-09-24 | 2023-10-10 | 江苏省沙钢钢铁研究院有限公司 | Steel plate hot rolling mill row and control method of steel throwing distance thereof |
| CN113857263A (en) * | 2021-10-29 | 2021-12-31 | 山信软件股份有限公司 | Method and device for controlling speed of steel plate after steel throwing |
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Application publication date: 20131218 |