CN113996654B - Operation control method of roughing mill - Google Patents
Operation control method of roughing mill Download PDFInfo
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- CN113996654B CN113996654B CN202010736139.8A CN202010736139A CN113996654B CN 113996654 B CN113996654 B CN 113996654B CN 202010736139 A CN202010736139 A CN 202010736139A CN 113996654 B CN113996654 B CN 113996654B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005096 rolling process Methods 0.000 claims abstract description 53
- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000013459 approach Methods 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 4
- 230000001934 delay Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 230000002441 reversible effect Effects 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 230000001360 synchronised effect Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
- B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
- B21B1/34—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/46—Roll speed or drive motor control
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses an operation control method of a roughing mill, which comprises the steps of carrying out speed grouping control on a roller way from a descaling box to an outlet of a second frame of roughing by detecting the position of a plate blank, wherein the speed of the roller way which is not occupied by the plate blank is reduced to zero; the rough rolling area has no slab information in a period of time, and the large side press, the first frame and the second frame of the rough rolling area stop running; when receiving slab information, the large side press, the first rack and the second rack stand by to operate; the idle stand is stopped and does not operate, so that the power consumption increase caused by idle running of the roughing mill is reduced. According to the invention, the existing roller ways are grouped, the operation mode of the existing rough rolling equipment is improved, the idle time of the rough rolling equipment is reduced, the power consumption is saved, and the production cost is reduced.
Description
Technical Field
The present invention relates to a technique for controlling a metal rolling mill or a processed product thereof, and more particularly, to a method for controlling operation of a roughing mill.
Background
The process flow of the hot rolling production line mainly comprises the procedures of heating, rough rolling, finish rolling, coiling, conveying chain, finishing and the like. Firstly, according to a rolling plan, loading the slabs into a step-type heating furnace in sequence, after the slabs are heated to a target temperature specified by a process, sequentially extracting the slabs by a steel extractor, placing the slabs on a roller way in front of the furnace, and then transporting the hot slabs to a roughing mill set. In a roughing mill set, a slab firstly enters a first descaling box for descaling, then the slab width reaches a target value after being subjected to side pressure by a large-side press, and then the slab is sent to a roughing first stand for rolling, wherein the roughing first stand is a two-roller reversible rolling mill for rolling for 1-3 times, then the slab enters a second stand for rolling, the second stand is a four-roller reversible rolling mill for rolling for 3-7 times, and a roller way is arranged in front of and behind each stand and is mainly responsible for conveying the slab along with the rolling mill. The rough rolling area rolls a slab with the thickness of 200-250 mm into an intermediate billet with the thickness of 38-60 mm, the intermediate billet is sent to the finishing mill group, the intermediate billet enters the finishing mill group, the head of the intermediate billet is removed by fly shearing and enters a second descaling box for descaling, and then the intermediate billet is continuously rolled into finished strip steel with the thickness of 1.2-25.4 mm by the finishing mill group. The strip steel is cooled and coiled into a steel coil after coming out of the last frame of the finishing mill group.
In the conventional hot continuous rolling mill, a slab with a length of 4.5-12 m is rolled one by one, and a certain time interval is reserved between two pieces of steel in order to ensure that the front steel piece and the rear steel piece do not collide, so that the operation control of the roughing mill has a standby idling mode (low-speed operation), a lifting speed mode, a high-speed transportation mode or a rolling mode. As shown in fig. 1, the existing control modes of the rough rolling area equipment are: when there is no slab in a certain frame area of the roughing mill, the frame area equipment stands by to rotate at a speed of 1 m/s; and when a slab is arranged in a certain frame area, all equipment in the frame area operates at a forward high speed according to a set speed of a model during odd-pass rolling, and when the equipment in the frame area operates at a reverse high speed according to a set speed of a model during even-pass rolling. However, this mode of operation wastes a great deal of electrical energy for production with a long time interval between the two pieces of steel.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an operation control method of a roughing mill, which reduces the idle time of the roughing mill, saves the electricity consumption and reduces the production cost by grouping the existing roller ways and improving the operation mode of the existing roughing mill.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the operation control method of the roughing mill comprises a roller way, a descaling box, a large side press, a first rack and a second rack which are sequentially arranged along the roller way, wherein a photoelectric tube is arranged along one side of the roller way, and the operation control method comprises the following steps:
1) Dividing and grouping areas of the roughing mill;
2) The operation mode of the roller way is formulated, and the operation mode is specifically as follows:
2.1 Tracking the head and tail positions of the plate blanks on the roller way;
2.2 Judging whether the rolling is odd pass rolling, if so, entering a step 2.3), otherwise, defining the head and tail parts of the plate blank for exchange;
2.3 Judging whether the head of the slab is close, if so, entering the step 2.4), and if not, stopping the roller way; judging whether the tail part of the slab leaves, if so, entering a step 2.4), and if not, running the roller way according to the model setting;
2.4 If the head of the slab approaches the judgment result, the roller way is set to run according to a model in advance; if the tail of the plate blank approaches to the judgment result, the roller way delays a group of stop;
3) The operation mode of the roughing mill is formulated, and specifically comprises the following steps:
3.1 If the slab approaches, the roller way runs according to the model setting; if no slab approach information exists within N minutes, the roughing mill is stopped.
Preferably, the area dividing and grouping in the step 1) specifically includes:
setting a roller way between the roller way inlet and the descaling box as a C roller way;
setting a roller way between the descaling box and the first rack as a D roller way, wherein n1 groups are shared;
setting a roller way between the first rack and the second rack as a G roller way, wherein n2 groups are shared;
setting a roller way between the second frame and the roller way outlet as an H roller way, wherein n3 groups are formed.
Preferably, in the step 2.1), the head and tail signals of each slab are tracked according to the speed of the roller way, the calculation of the photoelectric tube and the position of the slab reaching the roller way, and the group on the roller way occupied by each slab is determined.
Preferably, in the step 2.3), the roller way stops by setting the speed of the roller way to zero, and the control position of the PLC transmission system is zero, so that the motor has no exciting current, and the roller way stops rotating.
Preferably, in the step 3.1), when the slab approaches the roughing mill, the roller bed is operated at a speed set by a model, and when the rolling is received, the roller bed stands by to rotate at a speed of 1 m/s.
Preferably, in the step 3.1), the large side press, the first stand and the second stand are all standby to rotate when the slab approaches the roughing mill.
Preferably, in the step 3.1), when the slab approach information is not provided within N minutes, the large side press, the first frame and the second frame are stopped.
Preferably, the step 3) further includes a step 3.2), when the large side press receives the empty information, the side pressing mechanism of the large side press is automatically opened to the maximum limit and then stopped, and the main transmission device of the large side press stops running; when the large side press receives the use information, the side pressing mechanism of the large side press sets the opening degree to a set position according to a model, and the main transmission equipment of the large side press starts to operate according to the mode setting.
According to the operation control method of the roughing mill, provided by the invention, the idle time of the roughing mill is reduced, the power consumption is saved, and the production cost is reduced by grouping the existing roller ways and improving the operation mode of the existing roughing mill. In the production process of the reversible rolling mill, the working state from the forward rotation to the reverse rotation of the roller way is eliminated, so that the impact load of the direct change of the forward rotation and the reverse rotation on the roller way catcher is reduced, the falling fault of the roller way catcher is also greatly reduced, and the production stability is ensured.
Drawings
FIG. 1 is a schematic diagram of a prior art control mode of rough roll area equipment;
FIG. 2 is a schematic flow chart of the operation control method of the present invention;
fig. 3 is a schematic view of the division and grouping of the zones of the roughing mill in the operation control method of the present invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Referring to fig. 1 to 2, the operation control method of a roughing mill provided by the present invention includes a roller table 1, a descaling box 3, a large side press 4, a first frame 5 and a second frame 6 sequentially disposed along the roller table 1, and a photoelectric cell 2 disposed along one side of the roller table 1, and includes the following steps:
1) The roughing mill is divided into areas and grouped, and the method specifically comprises the following steps:
setting a roller way from an inlet of the roller way 1 to the descaling box 3 as a C roller way;
setting a roller way between the descaling box 2 and the first frame 5 as a D roller way, wherein 7 groups are respectively D1-D7;
setting the roller ways between the first frame 5 and the second frame 6 as G roller ways, wherein 12 groups are respectively G1-G12;
the roller way between the second frame 6 and the outlet of the roller way 1 is set as an H roller way, and 10 groups are respectively H1-H10.
2) The operation mode of the roller way is formulated, and the operation mode is specifically as follows:
2.1 According to the speed of the roller table 1, the calculation of the photoelectric tube 2, correcting the arrival position of the slab, tracking the head and tail signals of each slab, and determining the roller table group occupied by each slab.
2.2 The roller tables 1 in front of the head of the slab are set to run according to the model in advance, the roller tables 1 in back of the tail of the slab are set to run according to the model in advance, and the roller tables occupied by the slab are set to run after the operation is delayed. Since the roughing mill is a reversible mill, the slab is rolled in the finishing mill direction, referred to as odd pass rolling, and the slab is rolled in the heating direction, referred to as even pass rolling. When in even-pass rolling, the tail part of the plate blank in original odd-pass rolling is defined as the head part of the plate blank to carry out position tracking by a control program, and the head part of the plate blank in original odd-pass rolling is defined as the tail part of the plate blank to carry out position tracking by the control program.
2.3 Mode of stopping the roller table 1): the traditional roller way operation stopping method is that the motor exciting current is still kept through setting the motor speed to be zero, the electric roller way stops rotating, and the roller way cannot passively rotate. The running control method of the invention has the advantages that the running stop of the roller way is realized by setting the speed to be zero, the control position of the PLC transmission system is zero, the exciting current of the motor is not caused, and the roller way stops running but can passively and freely rotate.
3) The operation mode of the roughing mill is formulated, and specifically comprises the following steps:
3.1 The slab approaches the rolling mill, the rolling mill runs at a set speed according to the model, the rolling is finished, and the rolling mill stands by to rotate at a speed of 1 m/s.
3.2 No slab information is provided in the rough rolling area within N minutes, and the large side press 4, the first frame 5, and the second frame 6 in the rough rolling area stop operating.
3.3 When the slab information is received, the large-side press 4, the first frame 5, and the second frame 6 are on standby.
3.4 When the large side press receives the empty information, the side pressing mechanism of the large side press is automatically opened to the maximum limit and then stops, and the main transmission equipment of the large side press stops running; when the large-side press receives the usage information, the side pressure mechanism of the large-side press sets the opening degree to the set position according to the model, and the main transmission equipment of the large-side press starts to operate according to the mode setting.
Examples
The invention relates to an operation control method of a roughing mill, which is used for grouping control of roughing area equipment of a hot rolling production line shown in fig. 2, wherein the roughing area equipment mainly comprises a roller table 1, a photoelectric tube 2, a descaling box 3, a large side compressor 4, a first rack 5 and a second rack 6. The roller way in front of the descaling box 3 is a device for controlling the area of the heating furnace, and is defined as a C roller way. The descaling box 3, the roller ways in front of and behind the large side press 4 and in front of the first frame 5 are defined as D roller ways, and 7 groups are totally defined as D1-D7 respectively; the roller way between the first frame 5 and the second frame 6 is defined as a G roller way, and 12 groups are totally defined as G1-G12 respectively; the roller way behind the second frame 6 is defined as an H roller way, and 10 groups are respectively H1-H10.
The determination of the slab position is determined by a computer control system through the product S=V×T of the speed V and the time T of the roller way on one hand, and the position of the slab is corrected by a photoelectric tube 2 arranged on the edge of the roller way 1 on the other hand, when the photoelectric tube 2 detects the head part or the tail part of the slab, the position of the slab on the roller way 1 is forcedly corrected, and the calculation deviation of the computer control system caused by the skidding of the slab on the roller way 1 and the like is avoided.
When the slab is drawn out from the heating furnace and reaches the C roller way, the D1-D2 roller ways in the descaling box 3 start to run at the speed matched with the C roller way, the D3 starts to run after the head of the slab reaches the D1, and the roller ways in the advancing direction of the slab run in sequence; when the tail part of the slab reaches the D3 roller way, the running speed of the D1 roller way is set to be zero by a computer control system, and the control position of the PLC transmission system is zero, so that the excitation current of a motor is not needed, the roller way 1 stops rotating, but the roller way can passively and freely rotate (the stop of the following roller way is the same); when the tail part of the slab reaches the D4 roller way, the D2 roller way stops running, and the roller way in the advancing direction of the slab stops running in sequence.
After the head of the slab reaches the D3 roller way, if the large side press 4 is not empty, the large side press 4 is switched from a low-speed operation mode to a model set-speed operation mode, the speeds of the D3 roller way and the D4 roller way are synchronous with the large side press 4, the D5 roller way and the D6 roller way are synchronous in sequence, after the tail of the slab leaves the large side press 4, the D3 roller way stops operating, and the large side press 4 operates at a low speed; if the large side press 4 is empty, the D3-D6 are operated at a speed of 2 m/s in sequence, the slab is conveyed to D7, and after the tail part of the slab leaves the large side press 4, the D3 roller way stops operating.
After the head of the slab reaches D7, the first frame 5 is switched from a low-speed operation mode to a model set-speed operation (odd pass), and the speeds of the D4-D7 roller ways and the first frame 5 are synchronously operated; after the head of the slab enters the first frame 5, G1 and G2 are sequentially switched to the synchronous speed of the first frame 5, and the D4-D6 roller tables are sequentially stopped according to the tail position of the slab; after the tail part of the slab leaves the first frame 5, the G1 and G2 roller tables stop, the slab stays on the G1 and G2 roller tables, the first frame 5 rotates reversely at a low speed of 1 m/s, the first frame 5 carries out pass setting (even pass), at the moment, the tail part of the slab during odd pass rolling is automatically defined as the head part of the slab for position tracking by a control program, and the head part of the slab during original odd pass rolling is automatically defined as the tail part of the slab for position tracking by the control program; after the first frame 5 passes are set in place, the G1 roller way, the G2 roller way and the first frame 5 synchronously rotate reversely according to the set speed of the model, after the head part of the plate blank (the tail part of the original plate blank) enters the first frame 5, D7-D4 are sequentially switched to the synchronous speed of the first frame 5, and the G1 roller way and the G2 roller way are sequentially stopped according to the position of the tail part of the plate blank (the head part of the original plate blank); after the tail part of the slab leaves the first frame 5, the D4-D7 roller way is stopped, the slab stays on the D4-D7 roller way, the first frame 5 rotates forward at a low speed of 1 m/s, the first frame 5 carries out pass setting (odd pass), and the head and the tail of the slab are redefined by a control program; after the first frame 5 passes are set in place, the D4-D7 roller tables and the first frame 5 synchronously rotate forward according to the set speed of the model, after the head of the slab enters the first frame 5, G1 and G2 are sequentially switched to the synchronous speed of the first frame 5, and the D4-D6 roller tables are sequentially stopped according to the tail position of the slab; after the tail part of the slab leaves the first frame 5, the first frame 5 rotates forward at a low speed of 1 m/s, the roller ways G1 and G2 are automatically switched to the transmission speed set by the model, the head position of the slab is tracked, the roller ways G3-G12 are sequentially operated according to the set speed of the model, the tail position of the slab is tracked, and the roller ways G1-G11 are sequentially stopped.
After the head of the slab reaches G12, the second frame 6 is switched from a low-speed operation mode to a model set-speed operation (odd pass), and the speed of a G roller way occupied by the slab and the second frame 6 are synchronously operated; after the head of the slab enters the second frame 6, the speeds of the H1-H10 roller ways are sequentially switched to the synchronous speed of the second frame 6, and the G3-G12 roller ways are sequentially stopped according to the tail positions of the slab; after the tail part of the slab leaves the second frame 6, the H roller way is stopped, the slab stays on the H roller way, the second frame 6 rotates reversely at a low speed of 1 m/s, the second frame 6 carries out pass setting (even pass), at the moment, the tail part of the slab in odd pass rolling is automatically defined as the head part of the slab for position tracking by a control program, and the head part of the slab in original odd pass rolling is automatically defined as the tail part of the slab for position tracking by the control program; after the second frame 6 passes are set in place, the H roller way occupied by the slab and the second frame 6 synchronously rotate reversely according to the set speed of the model, and after the head part of the slab (the tail part of the original slab) enters the second frame 6, the G12-G3 roller way is sequentially switched to the synchronous speed of the second frame 6, and the H roller way is sequentially stopped according to the position of the tail part of the slab (the head part of the original slab); after the tail part of the slab leaves the second frame 6, the G12-G3 roller way is stopped, the slab stays on the G12-G3 roller way, the second frame 6 rotates forward at a low speed of 1 m/s, the second frame 6 carries out pass setting (odd pass), and the head and the tail of the slab are redefined by a control program; after the second frame 6 passes are set in place, the G roller way occupied by the slab and the second frame 6 synchronously rotate forward according to the set speed of the model, H1-H10 are sequentially switched to the synchronous speed of the second frame 6 after the head of the slab enters the second frame 6, and the G3-G12 roller way is sequentially stopped according to the tail position of the slab; after the tail part of the slab leaves the second frame 6, the second frame 6 rotates forward at a low speed of 1 m/s; the H1-H10 roller ways are automatically and sequentially switched to the transmission speed set by the model, the head position of the slab is tracked, after the head of the slab reaches H10, the H roller ways are switched to the finishing mill matching speed, the tail position of the slab is tracked, and the H1-H10 roller ways are sequentially stopped.
The rough rolling area has no slab information within 5 minutes, and the large side press 4, the first frame 5 and the second frame 6 of the rough rolling area stop running; when receiving the slab information, the large side press 4, the first frame 5 and the second frame 6 automatically rotate forward at a low speed of 1 m/s; when the large-side compressor 4 receives the empty information, the side pressure mechanism of the large-side compressor is automatically opened to the maximum limit and then stops, and the main transmission equipment of the large-side compressor 4 stops running: when the large-side compressor 4 receives the usage information, the side pressure mechanism of the large-side compressor 4 is automatically set in place according to the model setting opening degree, and the main transmission device of the large-side compressor 4 is automatically operated according to the model setting.
The operation control method of the roughing mill is used in 1580 roughing mill, and has the advantages that: by grouping the existing roller ways and improving the operation mode of the existing rough rolling equipment, the idle time of the rough rolling equipment is reduced, the power consumption is saved, and the production cost is reduced. In the production process of the reversible rolling mill, the working state from the forward rotation to the reverse rotation of the roller way is eliminated, so that the impact load of the direct change of the forward rotation and the reverse rotation on the roller way catcher is reduced, the falling fault of the roller way catcher is also greatly reduced, and the production stability is ensured.
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 (3)
1. The operation control method of the roughing mill comprises a roller way, a descaling box, a large side press, a first rack and a second rack which are sequentially arranged along the roller way, and a photoelectric tube is arranged along one side of the roller way, and the operation control method is characterized by comprising the following steps:
1) The roughing mill is divided into areas and grouped, and the method specifically comprises the following steps:
setting a roller way between the roller way inlet and the descaling box as a C roller way;
setting a roller way between the descaling box and the first rack as a D roller way, wherein 7 groups are totally provided, and D1-D7 are respectively provided;
setting a roller way between the first rack and the second rack as a G roller way, wherein 12 groups are total, and G1-G12 groups are respectively adopted;
setting a roller way between the second frame and the roller way outlet as an H roller way, wherein 10 groups of the H roller ways are H1-H10 respectively;
2) The operation mode of the roller way is formulated, and the operation mode is specifically as follows:
2.1 Tracking the head and tail positions of the plate blanks on the roller way;
2.2 Judging whether the rolling is odd pass rolling, if so, entering a step 2.3), otherwise, defining the head and tail parts of the plate blank for exchange;
2.3 Judging whether the head of the slab is close, if so, entering the step 2.4), and if not, stopping the roller way; judging whether the tail part of the slab leaves, if so, entering a step 2.4), and if not, running the roller way according to the model setting;
2.4 If the head of the slab approaches the judgment result, the roller way is set to run according to a model in advance; if the tail of the plate blank approaches to the judgment result, the roller way delays a group of stop;
3) The operation mode of the roughing mill is formulated, and specifically comprises the following steps:
3.1 The slab approaches the rolling mill, the rolling mill runs according to the set speed of the model, the rolling is finished, and the rolling mill stands by to rotate at the speed of 1 m/s;
3.2 No slab information exists in the rough rolling area within N minutes, and the large side press, the first frame and the second frame of the rough rolling area stop running;
3.3 When receiving slab information, the large side press, the first rack and the second rack stand by to operate;
3.4 When the large side press receives the empty information, the side pressing mechanism of the large side press is automatically opened to the maximum limit and then stops, and the main transmission equipment of the large side press stops running; when the large-side press receives the usage information, the side pressure mechanism of the large-side press sets the opening degree to the set position according to the model, and the main transmission equipment of the large-side press starts to operate according to the mode setting.
2. The operation control method of a roughing mill according to claim 1, wherein: in the step 2.1), tracking the head and tail signals of each slab according to the speed of the roller way, the calculation of the photoelectric tube and the position of the slab reaching the roller way, and determining the group on the roller way occupied by each slab.
3. The operation control method of a roughing mill according to claim 1, wherein: in the step 2.3), the roller way stops by setting the speed of the roller way to zero, and the control position of the PLC transmission system is zero, so that the motor has no exciting current, and the roller way stops rotating.
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| CN114472544B (en) * | 2022-03-07 | 2023-06-16 | 宝钢湛江钢铁有限公司 | Hot rolling gap control method, system, computer equipment and storage medium |
| CN114703359A (en) * | 2022-03-31 | 2022-07-05 | 新余钢铁股份有限公司 | Billet conveying control system and method for steel-pushing type stepping heating furnace |
| CN115121620A (en) * | 2022-06-17 | 2022-09-30 | 山西太钢不锈钢股份有限公司 | Control method for power-saving mode of hot continuous rolling roller way |
| CN115138678B (en) * | 2022-07-12 | 2024-08-30 | 河南中孚高精铝材有限公司 | Rapid rolling method and system of thermit continuous rolling roughing mill |
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