CN113996654A - Operation control method of roughing mill - Google Patents
Operation control method of roughing mill Download PDFInfo
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- CN113996654A CN113996654A CN202010736139.8A CN202010736139A CN113996654A CN 113996654 A CN113996654 A CN 113996654A CN 202010736139 A CN202010736139 A CN 202010736139A CN 113996654 A CN113996654 A CN 113996654A
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- plate blank
- roughing mill
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005096 rolling process Methods 0.000 claims abstract description 48
- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000013459 approach Methods 0.000 claims description 11
- 230000003111 delayed effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 230000002441 reversible effect Effects 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 230000001360 synchronised effect Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 230000005284 excitation Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects 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
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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
Abstract
The invention discloses an operation control method of a roughing mill, which carries out speed grouping control on roller ways from a descaling box to an outlet of a second rough rolling frame by detecting the position of a plate blank, and the speed of the roller ways not occupied by the plate blank is reduced to zero; the rough rolling area has no slab information within a period of time, and the large side press, the first frame and the second frame in the rough rolling area stop running; when plate blank information is received, the large side press, the first rack and the second rack are in standby operation; the idle machine frame stops and does not run, and the increase of power consumption caused by idle running of the roughing mill is reduced. The invention groups the existing roller ways and improves the operation mode of the existing rough rolling equipment, thereby reducing the idle time of the rough rolling equipment, saving the power consumption and reducing the production cost.
Description
Technical Field
The present invention relates to a control technique for a metal rolling mill or a work product thereof, and more particularly to an operation control method for a roughing mill.
Background
The hot rolling production line has the technological processes of heating, rough rolling, finish rolling, coiling, conveying chain, finishing and the like. The method comprises the steps of firstly, according to a rolling plan, sequentially loading slabs into a stepping heating furnace, after the slabs are heated to a target temperature specified by a process, sequentially drawing out the slabs by a steel drawing machine, placing the slabs on a roller way in front of the furnace, and then transporting the hot slabs to a roughing mill group. In a roughing mill set, a slab firstly enters a first descaling box for descaling, then is laterally pressed by a large lateral press to enable the width of the slab to reach a target value, and then is sent to a first roughing stand for rolling, the first roughing stand is a two-roller reversing mill and can roll for 1-3 times, then the slab enters a second stand for rolling, the second stand is a four-roller reversing mill and can roll for 3-7 times, and roller ways are arranged in front of and behind each stand and mainly responsible for conveying the slab along with the mills. And in the rough rolling area, rolling a 200-250 mm plate blank into a 38-60 mm intermediate blank, conveying the intermediate blank to the front of a finishing mill group, after the intermediate blank enters the finishing mill group, cutting off the head of the intermediate blank through a flying shear, then entering a second descaling box for descaling, and continuously rolling the intermediate blank into finished strip steel with the thickness of 1.2-25.4 mm through the finishing mill group. And after the strip steel comes out of the last frame of the finishing mill group, the strip steel is subsequently cooled and coiled into a steel coil.
The traditional hot continuous rolling mill rolls slabs with the length of 4.5-12 meters one by one, and a certain time interval is reserved between two pieces of steel in order to ensure that the front and the rear pieces of steel do not collide, so that a standby idling mode (low-speed operation), a speed increasing and decreasing mode, a high-speed transportation mode or a rolling mode are adopted for operation control of the roughing mill. As shown in fig. 1, the existing control modes of the rough rolling area equipment are as follows: when no slab exists in a certain frame area of the roughing mill, the equipment in the frame area rotates at the standby speed of 1 m/s; a plate blank is arranged in a certain rack area, all equipment in the rack area positively and high-speed operates according to the set speed of the model during odd-pass rolling, and all equipment in the rack area reversely and high-speed operates according to the set speed of the model during even-pass rolling. However, for production with a long time interval between the two steels, this way of operation is extremely wasteful of electrical energy.
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 power 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 purpose, the invention adopts the following technical scheme:
a running control method of a roughing mill comprises a roller way, a descaling box, a large side press, a first frame and a second frame which are sequentially arranged on the roller way, wherein a photoelectric tube is arranged on one side of the roller way, and the running control method comprises the following steps:
1) dividing and grouping the roughing mill into regions;
2) formulating the operation mode of the roller way, which specifically comprises the following steps:
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 the step 2.3), and if not, defining and exchanging the head and the tail of the plate blank;
2.3) judging whether the head of the plate blank is close to the head of the plate blank, if so, entering the step 2.4), and if not, stopping the roller way; judging whether the tail of the plate blank leaves, if so, entering the step 2.4), and if not, operating the roller way according to the model setting;
2.4) if the head of the plate blank is close to the plate blank, the roller ways are operated in advance according to the model setting; if the approach judgment of the tail part of the plate blank is yes, the roller ways are delayed to stop;
3) setting the operation mode of the roughing mill, specifically:
3.1) if the plate blanks are close to each other, the roller way operates according to the model setting; and if no slab approach information exists within N minutes, stopping the roughing mill.
Preferably, the area division and grouping of step 1) specifically includes:
setting a roller way between the roller way inlet and the descaling box as a C roller way;
setting the roller way between the descaling box and the first machine frame as a D roller way, wherein n1 groups are provided;
setting roller ways between the first frame and the second frame as G roller ways, wherein n2 groups are provided;
and setting the roller ways between the second frame and the roller way outlet as H roller ways, wherein n3 groups are provided.
Preferably, in the step 2.1), according to the speed of the roller way, the calculation of the photoelectric tube and the position of the slab reaching the roller way, the head and tail signals of each slab are tracked, and the group of each slab on the roller way is determined.
Preferably, in the step 2.3), the speed of the roller way is set to be zero when the roller way stops adopting the method, 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 way runs at a speed set by a model, and when rolling is received, the roller way stands by to rotate at a speed of 1 m/s.
Preferably, in the step 3.1), when the slab approaches the roughing mill, the large side press, the first frame and the second frame are all in standby rotation.
Preferably, in the step 3.1), when the slab approach information is not available within N minutes, the large side press, the first frame, and the second frame are all stopped.
Preferably, the step 3) further comprises a step 3.2), when the large side press receives the idle information, the side press mechanism of the large side press automatically opens to the maximum limit and stops, and the main transmission equipment of the large side press stops running; when the large side press receives the use information, the side press mechanism of the large side press sets the opening degree to a set position according to the model, and the main transmission device of the large side press starts to operate according to the mode setting.
According to the operation control method of the roughing mill, the existing roller ways are grouped, the operation mode of the existing roughing mill is improved, the idle time of the roughing mill is shortened, the power consumption is saved, and the production cost is reduced. In the production process of the reversible rolling mill, the working state that the roller way is directly changed from positive rotation to reverse rotation is eliminated, so that the impact load of the roller way catcher directly changed by the positive rotation and the reverse rotation is reduced, the falling fault of the roller way catcher is greatly reduced, and the production stability is ensured.
Drawings
FIG. 1 is a schematic diagram of the existing control scheme of a roughing mill section plant;
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 roughing mill in the operation control method of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Referring to fig. 1 to 2, the operation control method of a roughing mill provided by the present invention includes a roller way 1, a descaling box 3, a large side press 4, a first frame 5 and a second frame 6 sequentially disposed along the roller way 1, and a photoelectric tube 2 disposed along one side of the roller way 1, and includes the following steps:
1) the method comprises the following steps of carrying out region division and grouping on the roughing mill, specifically:
setting a roller way between the inlet of the roller way 1 and the descaling box 3 as a C roller way;
setting the roller ways between the descaling box 2 and the first machine frame 5 as D roller ways, wherein 7 groups are provided, namely D1-D7;
setting roller ways between the first frame 5 and the second frame 6 as G roller ways, wherein the total number of the roller ways is 12, and the groups are G1-G12;
and setting the roller ways between the second frame 6 and the outlet of the roller way 1 as H roller ways, wherein 10 groups are H1-H10.
2) Formulating the operation mode of the roller way, which specifically comprises the following steps:
2.1) according to the speed of the roller way 1, the calculation of the photoelectric tube 2 and the correction of the arrival position of the plate blank, tracking the head and tail signals of each plate blank, and determining the roller way group occupied by each plate blank.
2.2) the roller ways 1 in front of the head of the plate blank operate according to the model setting in advance, the roller ways 1 behind the tail of the plate blank operate after being delayed, and the roller ways occupied by the plate blank operate according to the model setting. Since the roughing mill is a reversible mill, rolling of the slab in the direction of the finishing mill is called odd pass rolling, and rolling of the slab in the direction of heating is called even pass rolling. During even pass rolling, the automatic control program of the tail part of the plate blank during original odd pass rolling is defined as the position tracking of the head part of the plate blank, and the automatic control program of the head part of the plate blank during original odd pass rolling is defined as the position tracking of the tail part of the plate blank.
2.3) manner of stopping the roller bed 1: the traditional roller way stopping operation is that the motor speed is set to be zero, the motor exciting current is still kept, the electric roller way stops rotating, and the roller way cannot rotate passively. The roller way of the operation control method of the invention stops operation by setting the speed to be zero and setting the control position of the PLC transmission system to be zero, so that the excitation current of the motor is not available, and the roller way stops but can freely rotate passively.
3) Setting the operation mode of the roughing mill, specifically:
3.1) the slab approaches the rolling mill, the rolling mill runs at the model set speed, the rolling is finished, and the rolling mill stands by to rotate at the speed of 1 m/s.
3.2) the rough rolling area has no slab information within N minutes, and the large side press 4, the first stand 5 and the second stand 6 of 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 in standby operation.
3.4) when the large side press receives the air passing information, the side press mechanism of the large side press automatically opens to the maximum limit and stops, and the main transmission equipment of the large side press stops running; when the large side press receives the use information, the side press mechanism of the large side press sets the opening degree to the set position according to the model, and the main transmission device of the large side press starts to operate according to the mode setting.
Examples
The operation control method of the roughing mill is used for grouping control of roughing area equipment of a hot rolling production line shown in figure 2, and the roughing area equipment mainly comprises a roller table 1, a photoelectric tube 2, a descaling box 3, a large side press 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 roller ways in front of and behind the descaling box 3, the large side press 4 and the first machine frame 5 are defined as D roller ways, and 7 groups are provided, namely D1-D7; the roller way between the first frame 5 and the second frame 6 is defined as G roller way, and the total number of the roller ways is 12 groups which are respectively G1-G12; the roller table behind the second frame 6 is defined as H roller table, and there are 10 groups, H1-H10.
The determination of the slab position is determined by a computer control system through the product S of the speed V and the time T of the roller way, the slab position is corrected by a photoelectric tube 2 arranged on the edge of the roller way 1 on the other side, and the position of the slab on the roller way 1 is forcibly corrected when the photoelectric tube 2 detects the head or the tail of the slab, so that the calculation deviation of the computer control system caused by the slippage of the slab on the roller way 1 is avoided.
When the plate blank is drawn out from the heating furnace and reaches the C roller way, the D1-D2 roller way in the descaling box 3 starts to run at the speed matched with the C roller way, the D3 starts to run after the head of the plate blank reaches D1, and the roller ways run in sequence in the advancing direction of the plate blank; when the tail of the plate blank reaches the D3 roller way, the D1 roller way is set to have zero running speed by the computer control system, the control position of the PLC transmission system is zero, so that the excitation current of the motor is zero, the roller way 1 stops rotating, but the roller way can freely rotate passively (the same principle is used for the subsequent roller way stopping); when the tail of the slab reaches the D4 roller way, the D2 roller way stops running, and the roller ways in the advancing direction of the slab stop running sequentially.
After the head of the plate blank reaches the D3 roller way, if the large side press 4 does not run, the large side press 4 is switched to the model set speed operation from the low speed operation mode, the speeds of the D3 roller way and the D4 roller way are synchronously operated with the large side press 4, the D5 roller way and the D6 roller way are sequentially synchronized, after the tail of the plate blank 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 runs empty, D3-D6 sequentially run at the speed of 2 m/s, the slab is conveyed to D7, and after the tail of the slab leaves the large side press 4, the D3 roller table stops running.
After the head of the plate blank reaches D7, the first machine frame 5 is switched to the model set speed operation (odd pass) from the low-speed operation mode, and the D4-D7 roller way speed and the first machine frame 5 synchronously operate; after the head of the plate blank enters the first frame 5, G1 and G2 are sequentially switched to the first frame 5 to synchronize the speed, and the D4-D6 roller ways are sequentially stopped according to the tail position of the plate blank; after the tail of the plate blank leaves the first machine frame 5, the G1 roller way and the G2 roller way stop, the plate blank stays on the G1 roller way and the G2 roller way, the first machine frame 5 reverses at a low speed of 1 m/s, the first machine frame 5 sets the pass (even pass), at the moment, the tail of the plate blank during the odd pass rolling is automatically defined as the head of the plate blank to carry out position tracking by a control program, and the head of the plate blank during the original odd pass rolling is automatically defined as the tail of the plate blank to carry out position tracking by the control program; after the first machine frame 5 passes are set in place, the G1 roller way, the G2 roller way and the first machine frame 5 synchronously reverse according to the set speed of the model, after the head (the original tail) of the plate blank enters the first machine frame 5, the D7-D4 are sequentially switched to the synchronous speed of the first machine frame 5, and the G1 roller way and the G2 roller way are sequentially stopped according to the position of the tail (the original head) of the plate blank; after the tail of the plate blank leaves the first machine frame 5, the D4-D7 roller way stops, the plate blank stays on the D4-D7 roller way, the first machine frame 5 rotates forwards at a low speed of 1 m/s, the first machine frame 5 sets the pass (odd pass), and the head and the tail of the plate blank are redefined by a control program; after the 5-pass setting of the first rack is in place, the D4-D7 roller way and the first rack 5 synchronously rotate forwards at the set speed of the model, after the head of the plate blank enters the first rack 5, G1 and G2 are sequentially switched to the synchronous speed of the first rack 5, and the D4-D6 roller way is sequentially stopped according to the tail position of the plate blank; after the tail of the slab leaves the first frame 5, the first frame 5 rotates forwards at a low speed of 1 m/s, the G1 roller table and the G2 roller table are automatically switched to the transmission speed set by the model, the head position of the slab is tracked, the G3-G12 roller table speed sequentially runs at the set speed of the model, the tail position of the slab is tracked, and the G1-G11 roller table speed sequentially stops.
After the head of the plate blank reaches G12, the second frame 6 is switched to the model set speed operation (odd pass) from the low-speed operation mode, and the G roller way speed occupied by the plate blank and the second frame 6 synchronously operate; after the head of the plate blank enters the second rack 6, the speed of the H1-H10 roller way is sequentially switched to the synchronous speed of the second rack 6, and the G3-G12 roller way is sequentially stopped according to the tail position of the plate blank; after the tail of the slab leaves the second rack 6, the H roller way stops, the slab stays on the H roller way, the second rack 6 reverses at a low speed of 1 m/s, the second rack 6 sets the pass (even pass), at the moment, the tail of the slab during the odd pass rolling is automatically defined as the head of the slab by a control program to carry out position tracking, and the head of the slab during the original odd pass rolling is automatically defined as the tail of the slab by the control program to carry out position tracking; after the 6-pass setting of the second rack is in place, the H roller way occupied by the plate blank and the second rack 6 synchronously reverse according to the set speed of the model, after the head (original tail) of the plate blank enters the second rack 6, the G12-G3 roller ways are sequentially switched to the synchronous speed of the second rack 6, and the H roller way is sequentially stopped according to the position of the tail (original head) of the plate blank; after the tail of the plate blank leaves the second machine frame 6, the G12-G3 roller way stops, the plate blank stays on the G12-G3 roller way, the second machine frame 6 rotates forwards at a low speed of 1 m/s, the second machine frame 6 sets the pass (odd pass), and the head and the tail of the plate blank are redefined by a control program; after the second rack 6 is set in place for the first time, the G roller way occupied by the plate blank and the second rack 6 synchronously rotate forwards at the set speed of the model, H1-H10 are sequentially switched to the synchronous speed of the second rack 6 after the head of the plate blank enters the second rack 6, and G3-G12 stop sequentially according to the tail position of the plate blank; after the tail part of the slab leaves the second frame 6, the second frame 6 rotates forwards at a low speed of 1 m/s; and automatically and sequentially switching the H1-H10 roller way to the transmission speed set by the model, tracking the head position of the plate blank, switching the H roller way to the matching speed of the finishing mill after the head of the plate blank reaches H10, tracking the tail position of the plate blank, and sequentially stopping the speed of the H1-H10 roller way.
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 slab information, the large side press 4, the first frame 5 and the second frame 6 automatically rotate forwards at a low speed of 1 m/s; when the large side press 4 receives the idle information, the side press mechanism of the large side press automatically opens to the maximum limit and stops, and the main transmission equipment of the large side press 4 stops: when the large side press 4 receives the use information, the side press mechanism of the large side press 4 is automatically set in place according to the set opening of the model, and the main transmission device of the large side press 4 automatically operates according to the set model.
The operation control method of the roughing mill is used in a 1580 roughing mill, and has the following good effects: the existing roller ways are grouped and the operation mode of the existing rough rolling equipment is improved, so that 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 that the roller way is directly changed from positive rotation to reverse rotation is eliminated, so that the impact load of the roller way catcher directly changed by the positive rotation and the reverse rotation is reduced, the falling fault of the roller way catcher is greatly reduced, and the production stability is ensured.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (8)
1. A running control method of a roughing mill, the roughing mill comprises a roller way, a descaling box, a large side press, a first frame and a second frame which are sequentially arranged on the roller way, and a photoelectric tube is arranged on one side of the roller way, and the running control method is characterized by comprising the following steps:
1) dividing and grouping the roughing mill into regions;
2) formulating the operation mode of the roller way, which specifically comprises the following steps:
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 the step 2.3), and if not, defining and exchanging the head and the tail of the plate blank;
2.3) judging whether the head of the plate blank is close to the head of the plate blank, if so, entering the step 2.4), and if not, stopping the roller way; judging whether the tail of the plate blank leaves, if so, entering the step 2.4), and if not, operating the roller way according to the model setting;
2.4) if the head of the plate blank is close to the plate blank, the roller ways are operated in advance according to the model setting; if the approach judgment of the tail part of the plate blank is yes, the roller ways are delayed to stop;
3) setting the operation mode of the roughing mill, specifically:
3.1) if the plate blanks are close to each other, the roller way operates according to the model setting; and if no slab approach information exists within N minutes, stopping the roughing mill.
2. The operation control method of the roughing mill according to claim 1, characterized in that said zone division and grouping of step 1) specifically comprises:
setting a roller way between the roller way inlet and the descaling box as a C roller way;
setting the roller way between the descaling box and the first machine frame as a D roller way, wherein n1 groups are provided;
setting roller ways between the first frame and the second frame as G roller ways, wherein n2 groups are provided;
and setting the roller ways between the second frame and the roller way outlet as H roller ways, wherein n3 groups are provided.
3. The operation control method of the roughing mill according to claim 2, characterized in that: in the step 2.1), according to the speed of the roller way, the calculation of the photoelectric tube and the position of the plate blank reaching the roller way, the head and tail signals of each plate blank are tracked, and the group occupied by each plate blank on the roller way is determined.
4. The operation control method of the roughing mill according to claim 1, characterized in that: in the step 2.3), the speed of the roller way is set to be zero when the roller way stops adopting, the control position of the PLC transmission system is zero, so that the motor has no exciting current, and the roller way stops rotating.
5. The operation control method of the roughing mill according to claim 1, characterized in that: in the step 3.1), when the slab approaches the roughing mill, the roller way runs at the speed set by the model, and when the slab is received by rolling, the roller way rotates at the speed of 1 m/s in a standby mode.
6. The operation control method of the roughing mill according to claim 5, characterized in that: in the step 3.1), when the slab approaches the roughing mill, the large side press, the first frame and the second frame all rotate in a standby mode.
7. The operation control method of the roughing mill according to claim 1, characterized in that: in the step 3.1), when the slab approach information does not exist within N minutes, the large side press, the first frame and the second frame are all stopped.
8. The operation control method of the roughing mill according to claim 1, characterized in that: the step 3) further comprises a step 3.2) of automatically opening a side pressing mechanism of the large side pressing machine to the maximum limit and then stopping when the large side pressing machine receives the idle information, and stopping the main transmission equipment of the large side pressing machine; when the large side press receives the use information, the side press mechanism of the large side press sets the opening degree to a set position according to the model, and the main transmission device of the large side press starts to operate according to the mode setting.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114472544A (en) * | 2022-03-07 | 2022-05-13 | 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 |
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| CN114472544A (en) * | 2022-03-07 | 2022-05-13 | 宝钢湛江钢铁有限公司 | Hot rolling gap control method, system, computer equipment and storage medium |
| 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 |
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