CN116020880A - Control method for rolling mill roll gap safety protection setting and rolling line - Google Patents
Control method for rolling mill roll gap safety protection setting and rolling line Download PDFInfo
- Publication number
- CN116020880A CN116020880A CN202111239451.7A CN202111239451A CN116020880A CN 116020880 A CN116020880 A CN 116020880A CN 202111239451 A CN202111239451 A CN 202111239451A CN 116020880 A CN116020880 A CN 116020880A
- Authority
- CN
- China
- Prior art keywords
- mill
- rolling
- roll gap
- vertical
- plc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a control method and a rolling line for rolling mill roll gap safety protection setting, wherein a rolling line PLC receives upper computer model vertical roll gap setting, combines actual width data of a rolled steel plate measured by a rough mill side guide plate as vertical roll gap logic setting, and reestablishes roll gap setting logic and error protection control by collecting a hot metal detector signal. The invention avoids the defects of the prior art, increases the productivity in hours, reduces the energy consumption loss during abnormal shutdown and reduces the equipment maintenance cost.
Description
Technical Field
The invention relates to an automatic control technology of a wide and thick plate vertical roller mill, in particular to a control method and a rolling line for safety protection setting of a roller gap of the rolling mill.
Background
Referring to fig. 1, the conventional 5m thick plate vertical rolling mill 1 is arranged in the region between the descaling box 2 and the roughing mill 3 on the production process site, and the vertical rolling mill 1 is mainly used for solving the problem of the plane shape of the roughing mill 3 in the steel plate widening stage and the finish rolling stage of the finishing mill 4, so that the steel plate yield is effectively improved. Referring to fig. 2, the vertical rolling mill calculates a roll gap to set a position according to steel plate information mainly by the combined action of a screw drive mechanical reduction (EWC), a work roll balance and a hydraulic reduction (HGC).
However, during actual production, the accident that the steel plate is extruded and arched by the vertical roller mill and is connected into the rough rolling inlet descaling header in series during the normal production process of the rough rolling mill when the steel plate is finally rolled by the vertical roller mill in a blank pass way in the rough rolling horizontal rolling mill.
According to the analysis of the field video and PDA data, the primary reason is judged as follows:
1. the setting of the vertical roll gap is too small, so that the head of the steel plate is arched, and the vertical roll gap is a direct cause of accidents;
2. the vertical roll gap takes the large value of the centering width of the rough rolling side guide plate and the calculated width of the model. L1 and L2 communication are abnormal sporadically, so that the theoretical width calculation adopts the width of the last steel plate. Meanwhile, the roll gap setting logic and the error-proof protection control are not perfect enough, so that the roll gap setting of the vertical roll is too small, and the vertical roll is the root cause of accidents.
The recorded data analysis of the checking and reading data acquisition system shows that the thickness of the rolled steel plate is 92mm, and the calculated width is 2567mm. When an accident happens, the set roll gap 2330mm of the vertical roller mill is narrower than the width of the steel plate by 237mm, and the steel plate is arched by being clamped by the excessive reduction of the vertical roller mill and finally is strung into a descaling header between the vertical roller and rough rolling. The 900-degree high-temperature steel plate is cooled to about 40 degrees by stopping the machine, then cutting treatment is carried out, surrounding crashed steel plates are recovered, the whole treatment process is about 7 hours fastest, time and labor are consumed, and the productivity of a rolling line and the heat preservation energy consumption of a furnace are seriously influenced. Meanwhile, the equipment repairing cost is increased.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a control method for safety protection setting of a rolling mill roll gap and a rolling line, which avoid the defects in the prior art, increase the productivity in hours, reduce the energy consumption loss during abnormal shutdown and reduce the equipment maintenance cost.
In order to achieve the above purpose, the invention adopts the following technical scheme:
on one hand, the control method for the roll gap safety protection setting of the rolling mill comprises the following steps:
the rolling line PLC receives the roll gap setting of the upper computer model vertical roll, combines the actual width data of the rolled steel plate measured by the side guide plate of the roughing mill as the logic setting of the vertical roll gap, and reestablishes the roll gap setting logic and error-proofing protection control by collecting signals of the hot metal detector.
Preferably, the control method specifically includes the following steps:
s1, setting a model vertical roll gap by an upper computer;
s2, a rolling line trunk PLC receives a steel plate BID (steel plate sequence mark), a rolling reduction and the number of times;
s3, judging whether the roughing mill allows steel feeding or not by the rolling line trunk PLC, if so, entering a step S4, and if not, returning to the step S2;
s4, rolling by a roughing mill;
s5, judging whether the width, the width-to-thickness ratio and the length of the next pass of the rolled steel plate meet the use conditions of a vertical roller mill by the PLC of the roughing mill, if so, entering a step S6, and if not, returning to the step S5;
s6, the roughing mill PLC sends an upper computer to request to use the vertical roller mill;
s7, the PLC of the vertical rolling mill receives roll gap setting of a steel plate issued by an upper computer, BID (steel plate sequence mark) and steel plate BID (steel plate sequence mark) sent by the PCL of the roughing mill;
s8, when the pass of the roughing mill is zero, judging whether BID (steel plate sequence mark) of the received steel plates is consistent or not by the PLC of the vertical rolling mill, if so, entering a step S9, and if not, automatically setting the roll gap of the vertical rolling mill to a safe position;
s9, a PLC of the vertical roller mill sends an allowable roll gap setting command;
s10, a roughing mill PLC sends out a command of measuring the width of a rolled steel plate by a side guide plate;
s11, the width of the rolled steel plate is measured by the last side guide plate before the roughing mill PLC records and uses the vertical roller mill;
s12, receiving the measured width of the steel plate by the PLC of the vertical roller mill, comparing the measured width with the roll gap of the steel plate issued by the upper computer, taking the maximum value as the final setting of the roll gap of the vertical roller;
s13, judging whether the roughing mill and the vertical roller mill allow steel feeding or not by the rolling line trunk PLC, if so, entering a step S14, and if not, returning to the step S12;
s14, a rolling line trunk PLC sends a motion command of using the vertical roller by the vertical roller PLC;
s15, starting the action of the vertical roller mill;
s16, judging whether the vertical roller mill acts to a target position, if so, entering a step S17, and if not, returning to the step S15;
s17, feeding steel by a vertical roller mill and starting rolling;
s18, leaving the tail of the rolled steel plate from the hot metal detector, and finishing the vertical roll rolling;
s19, waiting for the next rolled steel plate, and starting the vertical roll rolling.
On the other hand, the rolling line comprises a descaling box, a vertical rolling mill, a roughing mill and a finishing mill which are sequentially arranged along the running direction of a rolled steel plate, wherein an inlet side guide plate position sensor is arranged between the descaling box and the vertical rolling mill, an outlet side guide plate position sensor is arranged between the roughing mill and the vertical finishing mill, and a hot metal detector is arranged between the roughing mill and the outlet side guide plate position sensor;
the rolling line is used for realizing the control method for the roll gap safety protection setting of the rolling mill.
The control method and the rolling line for the safety protection setting of the rolling mill roll gap provided by the invention avoid the defects of the prior art, increase the productivity in hours, reduce the energy consumption loss during abnormal shutdown and reduce the equipment maintenance cost. Can be applied to the roll gap setting control of similar wide and thick plate vertical roller mill, and has wide popularization value.
Drawings
FIG. 1 is a schematic view of a prior art edger mill field layout;
FIG. 2 is a schematic diagram of a vertical roll mechanical hold down, work roll balance and hydraulic hold down field arrangement;
FIG. 3 is a schematic flow chart of the control method of the present invention;
FIG. 4 is a schematic view of a mill train in-situ layout of the present invention;
fig. 5 is a control schematic of the rolling line 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 and 5, the control method for roll gap safety protection setting of a rolling mill provided by the invention comprises the following steps:
the rolling line PLC receives the roll gap setting of the upper computer model vertical roll, combines the actual width data of the rolled steel plate measured by the side guide plate of the roughing mill as the logic setting of the vertical roll gap, and reestablishes the roll gap setting logic and error-proofing protection control by collecting signals of the hot metal detector.
The control method specifically comprises the following steps:
s1, setting a model vertical roll gap by an upper computer;
s2, a rolling line trunk PLC receives a steel plate BID (steel plate sequence mark), a rolling reduction and the number of times;
s3, judging whether the roughing mill allows steel feeding or not by the rolling line trunk PLC, if so, entering a step S4, and if not, returning to the step S2;
s4, rolling by a roughing mill;
s5, judging whether the width (more than 2.2m and less than 4.2 m), the width-to-thickness ratio (more than 0 and less than 60) and the length (more than 6 m) of the next pass of the rolled steel plate meet the use conditions of a vertical roller mill or not by using a roughing mill PLC, if so, entering a step S6, and if not, returning to the step S5;
s6, the roughing mill PLC sends an upper computer to request to use the vertical roller mill;
s7, the PLC of the vertical rolling mill receives roll gap setting of a steel plate issued by an upper computer, BID (steel plate sequence mark) and steel plate BID (steel plate sequence mark) sent by the PCL of the roughing mill;
s8, when the roughing pass is zero, judging whether BID (steel plate sequence mark) of the received steel plates is consistent or not by the PLC of the vertical rolling mill, if so, entering a step S9, and if not, automatically setting the roll gap of the vertical rolling mill to a safe position (more than 5 m);
s9, a PLC of the vertical roller mill sends an allowable roll gap setting command;
s10, a roughing mill PLC sends out a command of measuring the width of a rolled steel plate by a side guide plate;
s11, the width of the rolled steel plate is measured by the last side guide plate before the roughing mill PLC records and uses the vertical roller mill;
s12, receiving the measured width of the steel plate by the PLC of the vertical roller mill, comparing the measured width with the roll gap of the steel plate issued by the upper computer, taking the maximum value as the final setting of the roll gap of the vertical roller;
s13, judging whether the roughing mill and the vertical roller mill allow steel feeding or not by the rolling line trunk PLC, if so, entering a step S14, and if not, returning to the step S12;
s14, a rolling line trunk PLC sends a motion command of using the vertical roller by the vertical roller PLC;
s15, starting the action of the vertical roller mill;
s16, judging whether the vertical roller mill acts to a target position, if so, entering a step S17, and if not, returning to the step S15;
s17, feeding steel by a vertical roller mill and starting rolling;
s18, leaving the tail of the rolled steel plate from a hot metal detector (the installation position is 48.42 m), and finishing the vertical roll rolling;
s19, waiting for the next rolled steel plate, and starting the vertical roll rolling.
The invention also provides a rolling line which comprises a descaling box, a vertical rolling mill 5, a roughing mill 6 and a finishing mill which are sequentially arranged along the running direction of a rolled steel plate, wherein an inlet side guide plate position sensor 7 is arranged between the descaling box and the vertical rolling mill 5, an outlet side guide plate position sensor 8 is arranged between the roughing mill 6 and the vertical finishing mill, and a hot metal detector 9 is arranged between the roughing mill 6 and the outlet side guide plate position sensor 8.
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 (6)
1. A control method for rolling mill roll gap safety protection setting is characterized by comprising the following steps:
the rolling line PLC receives the roll gap setting of the upper computer model vertical roll, combines the actual width data of the rolled steel plate measured by the side guide plate of the roughing mill as the logic setting of the vertical roll gap, and reestablishes the roll gap setting logic and error-proofing protection control by collecting signals of the hot metal detector.
2. The control method for rolling mill roll gap safety protection setting according to claim 1, characterized in that: the control method specifically comprises the following steps:
s1, setting a model vertical roll gap by an upper computer;
s2, a rolling line trunk PLC receives the BID, the rolling reduction and the number of times of the steel plate;
s3, judging whether the roughing mill allows steel feeding or not by the rolling line trunk PLC, if so, entering a step S4, and if not, returning to the step S2;
s4, rolling by a roughing mill;
s5, judging whether the width, the width-to-thickness ratio and the length of the next pass of the rolled steel plate meet the use conditions of a vertical roller mill by the PLC of the roughing mill, if so, entering a step S6, and if not, returning to the step S5;
s6, the roughing mill PLC sends an upper computer to request to use the vertical roller mill;
s7, the PLC of the vertical rolling mill receives roll gap setting of a steel plate issued by an upper computer, BID and steel plate BID sent by the roughing mill PCL;
s8, when the pass of the roughing mill is zero, judging whether BIDs of the received steel plates are consistent by the PLC of the vertical rolling mill, if so, entering a step S9, and if not, automatically setting the roll gap of the vertical rolling mill to a safe position;
s9, a PLC of the vertical roller mill sends an allowable roll gap setting command;
s10, a roughing mill PLC sends out a command of measuring the width of a rolled steel plate by a side guide plate;
s11, the width of the rolled steel plate is measured by the last side guide plate before the roughing mill PLC records and uses the vertical roller mill;
s12, receiving the measured width of the steel plate by the PLC of the vertical roller mill, comparing the measured width with the roll gap of the steel plate issued by the upper computer, taking the maximum value as the final setting of the roll gap of the vertical roller;
s13, judging whether the roughing mill and the vertical roller mill allow steel feeding or not by the rolling line trunk PLC, if so, entering a step S14, and if not, returning to the step S12;
s14, a rolling line trunk PLC sends a motion command of using the vertical roller by the vertical roller PLC;
s15, starting the action of the vertical roller mill;
s16, judging whether the vertical roller mill acts to a target position, if so, entering a step S17, and if not, returning to the step S15;
s17, feeding steel by a vertical roller mill and starting rolling;
s18, leaving the tail of the rolled steel plate from the hot metal detector, and finishing the vertical roll rolling;
s19, waiting for the next rolled steel plate, and starting the vertical roll rolling.
3. The control method for rolling mill roll gap safety protection setting according to claim 2, characterized in that: in the step S5, the width of the next pass of the rolled steel plate is more than 2.2m and less than 4.2m, the width-to-thickness ratio is more than 0 and less than 60, and the length is more than 6m.
4. The control method for rolling mill roll gap safety protection setting according to claim 2, characterized in that: in the step S8, the roll gap of the vertical rolling mill is automatically set to a safety position greater than 5m.
5. The control method for rolling mill roll gap safety protection setting according to claim 2, characterized in that: in the step S18, the distance from the hot metal detector to the rolled steel sheet is 48.42m.
6. The utility model provides a rolling line, includes descaling box, edger mill, roughing mill and finish rolling mill that set gradually along rolling steel sheet running direction, its characterized in that: an inlet side guide plate position sensor is arranged between the descaling box and the vertical roller mill, an outlet side guide plate position sensor is arranged between the roughing mill and the vertical finishing mill, and a hot metal detector is arranged between the roughing mill and the outlet side guide plate position sensor;
the rolling line is used for realizing the control method for roll gap safety protection setting of the rolling mill according to one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111239451.7A CN116020880A (en) | 2021-10-25 | 2021-10-25 | Control method for rolling mill roll gap safety protection setting and rolling line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111239451.7A CN116020880A (en) | 2021-10-25 | 2021-10-25 | Control method for rolling mill roll gap safety protection setting and rolling line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116020880A true CN116020880A (en) | 2023-04-28 |
Family
ID=86089862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111239451.7A Pending CN116020880A (en) | 2021-10-25 | 2021-10-25 | Control method for rolling mill roll gap safety protection setting and rolling line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116020880A (en) |
-
2021
- 2021-10-25 CN CN202111239451.7A patent/CN116020880A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101811140B (en) | Method for width measurement and centering of rough rolling slab in hot rolling mill | |
| CN102205348B (en) | Control method for stopping reversible cold-rolling mill | |
| CN102553940B (en) | Method for controlling width of plate blank by using stokehold width gauge | |
| CN111185482A (en) | Stretch bending straightening mechanical system with over-weld self-adaptive function | |
| CN104014587A (en) | Long-length rolling method and production line of T-shaped elevator guide rails | |
| CN111187894B (en) | Method for determining steel charging time and preventing hot-fed steel billet from damaging stokehole equipment | |
| CN102888506A (en) | Method for controlling position of plate blank at extraction end of heating furnace | |
| CN114967627A (en) | Casting and rolling integrated material tracking and scheduling method for continuous casting-hot rolling process | |
| CN116020880A (en) | Control method for rolling mill roll gap safety protection setting and rolling line | |
| CN110586647B (en) | Non-intermittent rolling method for rough rolling R1 rolling mill | |
| CN109365543B (en) | Control system and method for hot rolling rough rolling final stand rolling mill in fault state | |
| CN111715702B (en) | Strip steel warping and flattening method in rough rolling process | |
| CN109550783B (en) | Rolling method of one-pass trapezoidal slab | |
| CN109865811B (en) | Continuous casting machine and tertiary cooling device of continuous casting blank thereof | |
| CN203853375U (en) | Long-length rolling production line for T-shaped guide rails of elevators | |
| CN102896184B (en) | Load reduction control method of hot straightener during reverse pass straightening | |
| CN113275385B (en) | Method for dynamically controlling to-be-rolled position of single-stand rolling mill | |
| CN113814275A (en) | Method for increasing hot charging rate of heating area of plate | |
| CN110180889B (en) | Track rolling production line and track rolling process applying same | |
| CN107597854B (en) | The control method of reciprocal reversable mill passage load optimal | |
| CN118056626A (en) | Control method for cooling bed equipment for preventing steel plate from collision and rolling line | |
| CN111992588B (en) | Method for controlling cold-rise of sleeve of strip steel layer | |
| CN118056625A (en) | Control method for preventing error of rolling pass of medium plate and rolling line | |
| CN109692871A (en) | A kind of rolling system that cold rolling is rolled up end to end | |
| CN117505540A (en) | Control method for slab rolling rhythm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |