CN118056625A - Control method for preventing error of rolling pass of medium plate and rolling line - Google Patents
Control method for preventing error of rolling pass of medium plate and rolling line Download PDFInfo
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- CN118056625A CN118056625A CN202211444539.7A CN202211444539A CN118056625A CN 118056625 A CN118056625 A CN 118056625A CN 202211444539 A CN202211444539 A CN 202211444539A CN 118056625 A CN118056625 A CN 118056625A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 33
- 238000004364 calculation method Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000033764 rhythmic process Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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Abstract
The invention discloses a control method and a rolling line for preventing errors of a medium plate rolling pass, which are characterized in that a first hot metal detector is arranged on one side of an inlet side guide plate of a roughing mill, and a second hot metal detector is arranged on one side of an outlet side guide plate of the roughing mill, so that position information of a current rolling plate blank is obtained, and a main PLC judges the space length of the rolling plate blank, calculates the final rolling plate blank length RL of the roughing mill, calculates the final rolling plate blank length FL of the finishing mill, calculates the assembly plate blank length BL between the roughing mill and the finishing mill, and calculates the roller way length TL between the roughing mill and the finishing mill. Judging whether the length TL of the roller way is larger than the sum of the length RL of the final rolled plate blank and the length FL of the final rolled plate blank and the length BL of the assembled plate blank, and if so, feeding steel, rolling and throwing steel in the positive pass of the roughing mill; the condition is not satisfied that the roughing mill stops feeding steel. The invention avoids the occurrence of errors in tracking images of the steel plates in the rough rolling area, reduces abnormal shutdown of the rolling mill, and reduces the occurrence rate of abnormal rolling materials.
Description
Technical Field
The invention relates to an automatic control technology of a heavy and medium plate mill, in particular to a control method and a rolling line for preventing errors of rolling passes of a heavy and medium plate mill.
Background
As shown in FIG. 1, a roughing mill of a 5m wide and thick plate production line in a certain iron and steel enterprise is arranged in a region between a vertical roller mill 2 and a finishing mill 3, and is mainly used for rolling steel plates with medium thickness, and the working principle of the rolling mill is to perform single-pass or multi-pass variable thickness rolling on the rolling mill according to the width, thickness and material of the steel plates.
Currently, the roughing mill of medium and thick plates at home and abroad adopts a means of cross combined rolling of a plurality of steel plates to improve the productivity of the mill. As shown in fig. 2. In the specific control process, the coordination relation between the rolling time and the waiting time of a plurality of steel plates 4 and the length limitation of the steel plates 4 are considered, the rolling rhythm is controlled, the space is reasonably scheduled, the waiting time of the rolling mill is reduced to the maximum extent, and the hour output of the rolling mill is improved.
In actual production, rough rolling finishes throwing steel in a certain pass in the assembly rolling process, but tracking images stay in the rough rolling mill in error, the tracking images need to be corrected again for rolling again, the pass errors of an upper computer can be caused, abnormal treatment leads to low temperature of the rolled steel plate, and finally normal rolling is abandoned, so that the production rhythm is seriously influenced.
As shown in fig. 2, further analysis is performed, in the process of normally biting the steel plate n+1 before the roughing mill 1 to start rolling, the steel plate N swings in a forward and reverse direction in the outer roller region of the roughing exit side guide plate, and the tail part of the intermediate billet steel plate is excessively long, so that the position tracking image of two steel plates in the roughing region is wrong, the pass calculation in the upper computer is not updated, and the roughing mill stops rolling.
Disclosure of Invention
Aiming at the defect that in the prior art, the tracking of the steel plate is wrong and the pass in an upper computer is not updated, the invention aims to provide a control method and a rolling line for preventing the error of the rolling pass of a medium plate, so that the error of the tracking image of the steel plate in a rough rolling area is avoided, the abnormal shutdown of a rolling mill is reduced, the productivity of the rolling mill in an hour is increased, and the occurrence rate of abnormal rolling materials is reduced.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The first aspect of the invention provides a control method for preventing errors of rolling passes of a medium plate, which comprises the following steps:
S1, drawing out a plate blank from a heating furnace;
s2, judging whether the slab is detected by a first hot metal detector, if so, entering a step S3, and otherwise, returning to the step S1;
S3, the trunk PLC requests an upper computer to perform rolling setting;
S4, the rough rolling PLC receives the rolling setting of the upper computer;
s5, the rough rolling PLC performs side guide plate centering and rolling mill roll gap setting;
s6, checking whether the roughing mill is ready, if yes, entering a step S7, and if no, returning to the step S5;
s7, judging the space length of the rolled plate blank by the main PLC;
S8, calculating the final rolling plate blank length RL of the roughing mill;
s9, calculating the final rolling slab length FL of the finishing mill;
S10, calculating the length BL of a blank assembly plate blank between the roughing mill and the finishing mill;
S11, calculating the length TL of a roller way between the roughing mill and the finishing mill;
S12, the main PLC judges whether the roller way length TL is larger than the sum of the final rolling slab length RL, the final rolling slab length FL and the group blank length BL, if so, the step S13 is carried out, and if not, the step S11 is returned;
s13, judging whether the tail position of the slab close to the roughing mill is detected by a second hot metal detector, if so, entering a step S14, and if not, entering a step S15;
S14, stopping steel feeding of the roughing mill, and waiting for meeting the conditions;
s15, feeding steel in the positive pass of the roughing mill;
s16, rolling by the roughing mill;
S17, performing steel throwing by the roughing mill;
S18, rolling pass of the upper computer is turned over, and next rolling is carried out.
Preferably, in the step S8, the calculation of the final slab length RL is specifically:
And calculating the length of the final rolling plate blank which is issued after the completion of the calculation by the rough rolling upper computer.
Preferably, in the step S9, the calculating of the final slab length FL specifically includes:
and calculating the length of the final rolling plate blank issued after finishing by the finish rolling upper computer.
Preferably, in the step S10, the calculating of the blank length BL specifically includes:
The tail of the last steel plate is subtracted from the head of the first steel plate according to the assembly area.
Preferably, in the step S11, the calculation of the roller length TL is specifically:
The position of the centerline of the roughing mill is subtracted from the position of the centerline of the finishing mill.
Preferably, the first hot metal detector and the second hot metal detector are HMD hot metal detectors.
Preferably, the first hot metal detector is arranged on one side of an inlet side guide plate of the roughing mill, and the second hot metal detector is arranged on one side of an outlet side guide plate of the roughing mill.
The second aspect of the invention provides a rolling line for preventing error of rolling pass of a medium plate, comprising a first hot metal detector arranged at one side of an inlet side guide plate of a roughing mill and a second hot metal detector arranged at one side of an outlet side guide plate of the roughing mill;
The first hot metal detector and the second hot metal detector establish data communication with the backbone PLC;
The rolling line realizes the control method for preventing the error of the rolling pass of the medium plate.
The control method and the rolling line for preventing errors of the rolling pass of the medium plate, provided by the invention, avoid errors of the tracking image of the steel plate in the rough rolling area, reduce abnormal shutdown of the rolling mill, increase the productivity in hours, and reduce the occurrence rate of abnormal rolling materials. Can be applied to the control of similar wide and thick plate straighteners and has wide popularization value.
Drawings
FIG. 1 is a schematic diagram of a prior art roughing mill field arrangement;
FIG. 2 is a schematic illustration of a prior art roughing and finishing mill-to-mill multi-plate rolling production arrangement;
FIG. 3 is a schematic flow chart of the control method of the present invention;
fig. 4 is a schematic view of a frame of a mill train of the present invention.
Detailed Description
In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Referring to fig. 3, the control method for preventing the error of the rolling pass of the medium plate provided by the invention comprises the following steps:
S1, drawing out a plate blank from a heating furnace;
S2, the first detector judges whether a slab is detected, if so, the step S3 is carried out, and if not, the step S1 is returned;
S3, the trunk PLC requests an upper computer to perform rolling setting;
S4, the rough rolling PLC receives rolling setting of the upper computer;
S5, performing centering of a side guide plate and roll gap setting of a rolling mill by using a rough rolling PLC;
s6, checking whether the roughing mill is ready, if yes, entering a step S7, and if no, returning to the step S5;
S7, judging the space length of the rolled plate blank by the main PLC;
s8, calculating the final rolling slab length RL of the roughing mill;
s9, calculating the final rolling slab length FL of the finishing mill;
s10, calculating the length BL of a blank plate blank between a roughing mill and a finishing mill;
S11, calculating the length TL of a roller way between a roughing mill and a finishing mill;
S12, judging whether the roller way length TL is larger than the sum of the final rolling slab length RL+the final rolling slab length FL+the assembled slab length BL by the main PLC, if so, entering the step S13, and if not, returning to the step S11;
S13, judging whether the tail position of the slab close to the roughing mill is detected by a second detector, if so, entering a step S14, and if not, entering a step S15;
s14, stopping steel feeding by the roughing mill, and waiting for meeting the conditions;
S15, feeding steel in the positive pass of the roughing mill;
S16, rolling by a roughing mill;
S17, performing steel throwing by a roughing mill;
S18, turning over the rolling pass of the upper computer to enter the next rolling pass.
In the above step S8, the final slab length RL is calculated specifically as follows: and calculating the length of the final rolling plate blank issued after the rough rolling upper computer finishes.
In the above step S9, the final slab length FL is calculated specifically as: and calculating the length of the final rolling plate blank issued after finishing the calculation by the finish rolling upper computer.
In the above step S10, the calculation of the blank length BL is specifically: subtracting the tail of the last steel plate from the head of the first steel plate in the assembly area.
In the above step S11, the calculation of the roller length TL is specifically: the position of the centerline of the finishing mill minus the position of the centerline of the roughing mill.
The first hot metal detector and the second hot metal detector adopt HMD hot metal detectors.
The first hot metal detector is arranged on one side of an inlet side guide plate of the roughing mill, and the second hot metal detector is arranged on one side of an outlet side guide plate of the roughing mill.
As shown in fig. 4, the present invention also provides a rolling line for preventing errors in rolling passes of a medium plate, comprising a first hot metal detector 11 provided at one side of an inlet side guide 10 of a roughing mill, and a second hot metal detector 13 provided at one side of an outlet side guide 12 of the roughing mill.
The first hot metal detector 11 and the second hot metal detector 13 are in data communication with the backbone PLC.
The control method for preventing the error of the rolling pass of the medium plate is realized through the rolling line.
It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the invention, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the invention as long as they fall within the true spirit of the invention.
Claims (8)
1. A control method for preventing errors of rolling pass of a medium plate is characterized by comprising the following steps:
S1, drawing out a plate blank from a heating furnace;
s2, judging whether the slab is detected by a first hot metal detector, if so, entering a step S3, and otherwise, returning to the step S1;
S3, the trunk PLC requests an upper computer to perform rolling setting;
S4, the rough rolling PLC receives the rolling setting of the upper computer;
s5, the rough rolling PLC performs side guide plate centering and rolling mill roll gap setting;
s6, checking whether the roughing mill is ready, if yes, entering a step S7, and if no, returning to the step S5;
s7, judging the space length of the rolled plate blank by the main PLC;
S8, calculating the final rolling plate blank length RL of the roughing mill;
s9, calculating the final rolling slab length FL of the finishing mill;
S10, calculating the length BL of a blank assembly plate blank between the roughing mill and the finishing mill;
S11, calculating the length TL of a roller way between the roughing mill and the finishing mill;
S12, the main PLC judges whether the roller way length TL is larger than the sum of the final rolling slab length RL, the final rolling slab length FL and the group blank length BL, if so, the step S13 is carried out, and if not, the step S11 is returned;
s13, judging whether the tail position of the slab close to the roughing mill is detected by a second hot metal detector, if so, entering a step S14, and if not, entering a step S15;
S14, stopping steel feeding of the roughing mill, and waiting for meeting the conditions;
s15, feeding steel in the positive pass of the roughing mill;
s16, rolling by the roughing mill;
S17, performing steel throwing by the roughing mill;
S18, rolling pass of the upper computer is turned over, and next rolling is carried out.
2. The method according to claim 1, wherein in step S8, the final slab length RL is calculated specifically as follows:
And calculating the length of the final rolling plate blank which is issued after the completion of the calculation by the rough rolling upper computer.
3. The method according to claim 1, wherein in step S9, the final slab length FL is calculated by:
and calculating the length of the final rolling plate blank issued after finishing by the finish rolling upper computer.
4. The method according to claim 1, wherein in step S10, the calculation of the length BL of the assembled slab is specifically:
The tail of the last steel plate is subtracted from the head of the first steel plate according to the assembly area.
5. The method according to claim 1, wherein in step S11, the calculation of the roller length TL is specifically:
The position of the centerline of the roughing mill is subtracted from the position of the centerline of the finishing mill.
6. The control method for preventing errors in rolling passes of a medium plate according to claim 1, wherein: the first hot metal detector and the second hot metal detector adopt HMD hot metal detectors.
7. The control method for preventing errors in rolling passes of a medium plate according to claim 1, wherein: the first hot metal detector is arranged on one side of an inlet side guide plate of the roughing mill, and the second hot metal detector is arranged on one side of an outlet side guide plate of the roughing mill.
8. A rolling line for preventing error of medium plate rolling pass is characterized in that: the device comprises a first hot metal detector arranged on one side of an inlet side guide plate of a vertical roller mill and a second hot metal detector arranged on one side of an outlet side guide plate of a roughing mill;
The first hot metal detector and the second hot metal detector establish data communication with the backbone PLC;
The rolling line realizes the control method for preventing the error of the rolling pass of the medium plate according to the claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211444539.7A CN118056625A (en) | 2022-11-18 | 2022-11-18 | Control method for preventing error of rolling pass of medium plate and rolling line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211444539.7A CN118056625A (en) | 2022-11-18 | 2022-11-18 | Control method for preventing error of rolling pass of medium plate and rolling line |
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| Publication Number | Publication Date |
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| CN118056625A true CN118056625A (en) | 2024-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211444539.7A Pending CN118056625A (en) | 2022-11-18 | 2022-11-18 | Control method for preventing error of rolling pass of medium plate and rolling line |
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| Country | Link |
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| CN (1) | CN118056625A (en) |
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- 2022-11-18 CN CN202211444539.7A patent/CN118056625A/en active Pending
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