CN111346924B - Anti-pressing steel control method and device and strip steel finish rolling equipment - Google Patents
Anti-pressing steel control method and device and strip steel finish rolling equipment Download PDFInfo
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- CN111346924B CN111346924B CN202010198461.XA CN202010198461A CN111346924B CN 111346924 B CN111346924 B CN 111346924B CN 202010198461 A CN202010198461 A CN 202010198461A CN 111346924 B CN111346924 B CN 111346924B
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- 238000005096 rolling process Methods 0.000 title claims abstract description 269
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 97
- 239000010959 steel Substances 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000003825 pressing Methods 0.000 title claims abstract description 32
- 230000002265 prevention Effects 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 230000011664 signaling Effects 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010008 shearing Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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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- 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
- B21B1/24—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 continuous or semi-continuous process
- B21B1/26—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 continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
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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
- B21B37/48—Tension control; Compression control
- B21B37/50—Tension control; Compression control by looper control
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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
- B21B37/58—Roll-force control; Roll-gap control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
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Abstract
The invention discloses a steel-pressing prevention control method and device and strip steel finish rolling equipment, wherein the steel-pressing prevention control method is applied to the strip steel finish rolling equipment, the strip steel finish rolling equipment comprises M rolling mills which are sequentially arranged, a loop is arranged between every two rolling mills, M is an integer not less than 2, and the steel-pressing prevention control method comprises the following steps: after receiving the anti-pinch control signal, keeping the front N-frame rolling mill in a normal rolling state, controlling the roll gaps from the (N + 1) -th rolling mill to the M-th rolling mill to be opened, decelerating the (N + 1) -th rolling mill to the M-th rolling mill to enable the speeds of the (N + 1) -th rolling mill to the M-th rolling mill to be the same as the speed of the N-th rolling mill, and lowering the loop behind the N-th rolling mill to a waiting position, wherein N is a positive integer. The anti-pressing control method and device and the strip steel finish rolling equipment provided by the invention can avoid pressing accidents of the finish rolling unit.
Description
Technical Field
The invention relates to the technical field of metallurgical equipment control, in particular to a steel-pressing prevention control method and device and strip steel finish rolling equipment.
Background
The hot rolling process of the sheet generally comprises heating, rough rolling, flying shear, finish rolling, coiling and the like, wherein the finish rolling stage is the most critical and directly influences various control indexes of a finished product. In the prior art, when the conditions of deviation, abnormal plate shape and the like of the rolled strip steel of the finishing mill group occur, the adjustment can be manually carried out only by an operator. When the state cannot be improved, an operator needs to trigger the emergency stop or quick stop function of the finishing mill group to stop the rolling mill immediately, so that the steel pressing accident of the finishing mill group is caused. The steel pressing accident of the finishing mill group is one of the common accidents in the rolling process of the hot rolled plate strip steel, a roller for pressing steel is easy to generate hot cracks, the crack defect can be eliminated only by increasing the abrasion of the roller, the roller consumption of the roller is greatly increased, the accident treatment time of pressing steel is long, a production line is in a standby state for a long time, the release capacity of the roller is greatly limited, and the production cost is increased.
Disclosure of Invention
The invention aims to solve the problem of steel pressing accidents caused by the fact that strip steel passes through a finishing mill group.
The invention is realized by the following technical scheme:
the anti-pinch control method is applied to strip steel finish rolling equipment, the strip steel finish rolling equipment comprises M rolling mills which are sequentially arranged, a loop is arranged between every two rolling mills, M is an integer not less than 2, and the anti-pinch control method comprises the following steps:
after receiving the anti-pinch control signal, keeping the front N-frame rolling mill in a normal rolling state, controlling the roll gaps from the (N + 1) -th rolling mill to the M-th rolling mill to be opened, decelerating the (N + 1) -th rolling mill to the M-th rolling mill to enable the speeds of the (N + 1) -th rolling mill to the M-th rolling mill to be the same as the speed of the N-th rolling mill, and lowering the loop behind the N-th rolling mill to a waiting position, wherein N is a positive integer.
Optionally, after receiving the steel-pressing prevention control signal, the method further includes:
controlling a hot metal detector to detect whether the length of a residual plate blank is greater than a preset length, wherein the residual plate blank is a plate blank which does not enter the strip steel finish rolling equipment;
and if the length of the residual slab is greater than the preset length, controlling a flying shear to cut off the residual slab.
Optionally, after the control flying shear cuts off the residual slab, the method further includes:
and controlling the middle roller way to push out the residual plate blank.
Optionally, the preset length is 4 m.
Optionally, after receiving the steel-pressing prevention control signal, the method further includes:
and controlling the speed of an outlet roller way of the M-th rolling mill, the speed of a laminar cooling roller way and the speed of the coiling machine to be matched with the speed of the M-th rolling mill.
Based on the same inventive concept, the invention also provides a pressure-resistant steel control device, which is applied to strip steel finish rolling equipment, wherein the strip steel finish rolling equipment comprises M rolling mills which are sequentially arranged, a loop is arranged between every two rolling mills, M is an integer not less than 2, and the pressure-resistant steel control device comprises:
the signal receiving module is used for receiving the steel pressing prevention control signal;
and the control module is used for keeping the front N rolling mills in a normal rolling state after receiving the anti-pinch control signal, controlling the roll gaps from the (N + 1) th rolling mill to the M-th rolling mill to be opened, decelerating the (N + 1) th rolling mill to the M-th rolling mill to enable the speeds of the (N + 1) th rolling mill to the M-th rolling mill to be the same as the speed of the N-th rolling mill, and descending the loop positioned behind the N-th rolling mill to a waiting position, wherein N is a positive integer.
Optionally, the control module is further configured to control the hot metal detector to detect whether the length of the remaining slab is greater than a preset length after receiving the anti-rolling control signal, and control the flying shear to cut off the remaining slab when the length of the remaining slab is greater than the preset length, where the remaining slab is a slab that does not enter the strip steel finish rolling equipment.
Optionally, the control module is further configured to control the middle roller way to push out the residual slab after the control flying shear cuts off the residual slab.
Optionally, the control module is further configured to control the speed of the exit roller way of the M-th rolling mill, the speed of the laminar cooling roller way, and the speed of the coiler to match the speed of the M-th rolling mill after receiving the anti-pinch control signal.
Based on the same inventive concept, the invention also provides strip steel finish rolling equipment which comprises M rolling mills arranged in sequence, wherein a loop is arranged between every two rolling mills, M is an integer not less than 2, and the strip steel finish rolling equipment also comprises the anti-pressing steel control device.
Compared with the prior art, the invention has the following advantages and beneficial effects:
after receiving the anti-pinch control signal, the anti-pinch control method and the anti-pinch control device as well as the strip steel finish rolling equipment keep the front N rolling mills in a normal rolling state, control the roll gaps from the (N + 1) th rolling mill to the M (M) th rolling mill to be opened, decelerate the (N + 1) th rolling mill to the M (M) th rolling mill, ensure that the speeds from the (N + 1) th rolling mill to the M (M) th rolling mill are the same as the speed of the N (N) th rolling mill, and lower the loop behind the N (N) th rolling mill to a waiting position, can ensure that strip steel continuously and normally rolls out of a finish rolling unit at matched second flow, avoid the occurrence of a pinch steel accident of the finish rolling unit, thereby solving the problem that the processing cost is influenced by high roll consumption caused by the pile steel and pinch steel accidents, and solving the problem that the productivity is influenced by long processing time of the pile steel and pinch.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic layout view of a strip finishing apparatus and a coiler unit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a crush prevention control device according to an embodiment of the present invention.
Detailed Description
The application provides a steel pressing prevention control method and device and strip steel finish rolling equipment, and solves the problem that steel pressing accidents happen when strip steel passes through a finish rolling unit in the prior art.
In order to solve the technical problems, the general idea is as follows:
the anti-pinch control method is applied to strip steel finish rolling equipment, the strip steel finish rolling equipment comprises M rolling mills which are sequentially arranged, a loop is arranged between every two rolling mills, M is an integer not less than 2, and the anti-pinch control method comprises the following steps:
after receiving the anti-pinch control signal, keeping the front N-frame rolling mill in a normal rolling state, controlling the roll gaps from the (N + 1) -th rolling mill to the M-th rolling mill to be opened, decelerating the (N + 1) -th rolling mill to the M-th rolling mill to enable the speeds of the (N + 1) -th rolling mill to the M-th rolling mill to be the same as the speed of the N-th rolling mill, and lowering the loop behind the N-th rolling mill to a waiting position, wherein N is a positive integer.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
The embodiment provides a steel-pressing prevention control method which is applied to strip steel finish rolling equipment, wherein the strip steel finish rolling equipment comprises M rolling mills which are sequentially arranged, a loop is arranged between every two rolling mills, and M is an integer not less than 2. Taking a TMEIC system as an example, fig. 1 is a layout schematic diagram of the strip steel finish rolling equipment and a recoiling unit, wherein the strip steel finish rolling equipment comprises seven rolling mills F1-F7 which are sequentially arranged, a loop is arranged between every two rolling mills, namely a loop L1 is arranged between a rolling mill F1 and a rolling mill F2, a loop L2 is arranged between a rolling mill F2 and a rolling mill F3, a loop L3 is arranged between the rolling mill F3 and a rolling mill F4, a loop L4 is arranged between the rolling mill F4 and the rolling mill F5, a loop L5 is arranged between the rolling mill F5 and the rolling mill F6, and a loop L6 is arranged between the rolling mills F6 and F7. The number of rolling mills and loops may also differ for different rolling systems. For convenience of description, the strip finishing equipment of the TMEIC system is taken as an example in the present embodiment, but it should be noted that the anti-rolling control method provided in the present embodiment is not limited to be applied to the strip finishing equipment of the TMEIC system, and is also applicable to strip finishing equipment of other types of systems.
The anti-pressing steel control method comprises the following steps:
after receiving the anti-pinch control signal, keeping the front N-frame rolling mill in a normal rolling state, controlling the roll gaps from the (N + 1) -th rolling mill to the M-th rolling mill to be opened, decelerating the (N + 1) -th rolling mill to the M-th rolling mill to enable the speeds of the (N + 1) -th rolling mill to the M-th rolling mill to be the same as the speed of the N-th rolling mill, and lowering the loop behind the N-th rolling mill to a waiting position, wherein N is a positive integer.
Specifically, when the rolling strip steel of the finishing mill group is in an abnormal state, an operator can generate the steel pressing prevention control signal by clicking a button of the operating platform. The abnormal states of the rolled strip steel of the finishing mill group include but are not limited to the following situations: after the M frame rolling mill finishes threading, the head deviates and bright strips appear for 3-5 seconds, and the adjustment is invalid; middle waves appear in the rolling process, the roller is adjusted to the lower limit, no improvement is caused, and bright bands appear; sudden single-edge wave deviation occurs in rolling, the side guide plate is cut off, and adjustment is ineffective; and the current from the (N + 1) th rolling mill to the M-th rolling mill reaches a preset current value and continuously rises.
The speed and the roll gap between the rolling mill F1 and the rolling mill F7 corresponding to different varieties and specifications are large in difference, and the speed and the roll gap between the rolling mill F1 and the rolling mill F7 are set and are issued by a secondary system after the detection of a hot metal detector HMD403 before the plate blank enters the finish rolling mill. After the anti-pinch control signal is received, the front N rolling mills are kept in a normal rolling state, namely the front N rolling mills keep a normal AGC adjusting function, and the set parameters are locked to the set continuous rolling of the current intermediate billet; controlling roll gaps from the (N + 1) th rolling mill to the M (M) th rolling mill to be opened, namely controlling HGC cylinders from the (N + 1) th rolling mill to the M (M) th rolling mill to be opened quickly, and opening the roll gaps from the (N + 1) th rolling mill to the M (M) th rolling mill to the maximum position at a first preset speed (for example, 1.5mm/s) on the basis of the original roll gaps; decelerating the (N + 1) th rolling mill to the (M) th rolling mill to enable the speed of the (N + 1) th rolling mill to the (M) th rolling mill to be the same as that of the (N) th rolling mill, namely controlling the (N + 1) th rolling mill to the (M) th rolling mill to perform deceleration production at a second preset speed (for example, 1.3M/s) until the speed of the (N + 1) th rolling mill to the (M) th rolling mill is the same as that of the (N) th rolling mill; and (4) lowering the loop positioned after the Nth rolling mill to a waiting position, namely switching the loop positioned after the Nth rolling mill from the tension and the position to the waiting position (9-10 degrees).
Taking the strip steel finishing rolling equipment shown in fig. 1 as an example, if the value of N is 2, after receiving the anti-rolling control signal, the rolling mill F1 and the rolling mill F2 keep the normal AGC adjusting function, and set parameters are locked to the setting of the current intermediate billet to continue rolling; the loops L2 to L6 are switched to waiting positions (9-10 degrees) by tension and position control; the HGC cylinders from the rolling mill F3 to the rolling mill F7 are opened quickly, and the roll gap is opened to the maximum position at the speed of 1.5mm/s on the basis of the original roll gap; rolling mills F3 to F7 were produced at a reduced speed of 1.3m/s until the rolling speed and the rolling speed of rolling mill F2 were kept the same.
It should be noted that the value of N is determined according to the position of the strip steel with the abnormality in the actual production process and the thickness of the strip steel that can be coiled by the coiler, which is not limited in this embodiment. The rolling of the (N + 1) th rolling mill to the M th rolling mill is a rolling mill in which strip steel is easy to be abnormal, and taking the strip steel is easy to be abnormal in the rolling mills F5 to F7 as an example, the value of N can be 1, 2, 3 or 4. Considering that the value of N is too small, the thickness of the strip steel after coming out of the rolling mill F7 is too thick, so that the coiler cannot coil, the value of N can be increased, for example, the value of N can be 2, 3 or 4. Further, after receiving the anti-pinch control signal, the control unit controls the roll gap between the (N + 1) th rolling mill and the M th rolling mill to be opened, decelerates the (N + 1) th rolling mill and the M th rolling mill, and lowers the loop located behind the N th rolling mill to a waiting position, which may be performed successively or simultaneously, but is not limited in this embodiment.
In order to increase the processing speed of the finishing mill group when the rolling strip steel is in an abnormal state, in an optional implementation manner, after receiving the anti-rolling control signal, the method may further include: controlling a hot metal detector to detect whether the length of a residual plate blank is greater than a preset length, wherein the residual plate blank is a plate blank which does not enter the strip steel finish rolling equipment; and if the length of the residual slab is greater than the preset length, controlling a flying shear to cut off the residual slab.
Specifically, after receiving the anti-pinch control signal, whether the length of the residual slab is greater than the preset length is detected by controlling a hot metal detector (e.g., HMD403) provided at a finish rolling entrance. The distance from the hot metal detector to the center line of the flying shear is the preset distance, when the hot metal detector detects the hot metal detector, the length of the residual plate blank is larger than the preset length, the flying shear is controlled to perform accident cutting, namely the flying shear is started from 90 degrees, a circle of shearing is performed, and the angle returns to 90 degrees; when the hot metal detector is detected, the length of the residual plate blank is not larger than the preset length, and the accidental cutting is not performed, so that the occurrence of chute clamping accidents is prevented.
After the control flying shear cuts off the residual slab, the method further comprises the following steps: and controlling the middle roller way to push out the residual plate blank. And after the accidental cutting is carried out, the front section strip steel is normally rolled out of a finishing mill by the mill, and the residual plate blank is pushed out through a middle roller way.
It should be noted that, the shorter the preset length is set, the faster the processing speed of the finishing mill set when the rolling strip is in an abnormal state, but when the shearing length is too short, the weight of the strip is small and the contact area with the roller way is small, and the friction force is not enough to enable the strip to run on the roller way, which may prolong the accident processing time. Therefore, the preset length can be set according to the actual production condition. In the embodiment, the length range of the intermediate billet is generally 35m-80m, the preset length is 4m, namely when the tail length of the strip steel is more than 4m, the flying shear performs shearing; when the length of the tail part of the strip steel is less than or equal to 4m, the flying shear does not execute shearing.
During rolling, the speed of the exit roller table of the mth rolling mill, the speed of the laminar cooling roller table, and the speed of the coiler need to be matched to the speed of the mth rolling mill. When the rolling strip steel of the finishing mill group is in an abnormal state, the speed of the M-th rolling mill is changed, so that after the rolling strip steel is received, the method further comprises the following steps: and controlling the speed of an outlet roller way of the M-th rolling mill, the speed of a laminar cooling roller way and the speed of the coiling machine to be matched with the speed of the M-th rolling mill. The speed of the outlet roller way of the M-th rolling mill, the speed of the layer cooling roller way and the speed of the coiling machine are controlled to be matched with the speed of the M-th rolling mill, so that the strip steel is conveyed to the coiling machine at a constant speed, and meanwhile, the rotating speed of the coiling machine is matched with the rotating speed of the layer cooling roller way, and the strip steel is ensured to be coiled smoothly.
According to the anti-pinch control method provided by the embodiment, after the anti-pinch control signal is received, the roll gaps between the (N + 1) th rolling mill and the M (M) th rolling mill are controlled to be opened by keeping the front N rolling mill in a normal rolling state, the (N + 1) th rolling mill and the M (M) th rolling mill are decelerated, so that the speeds of the (N + 1) th rolling mill and the M (M) th rolling mill are the same as the speed of the N (N) th rolling mill, and the loop behind the N (N) th rolling mill is lowered to a waiting position, so that strip steel can be continuously and normally rolled out of a finishing mill group at matched second flow, and the occurrence of a pinch accident of the finishing mill group is avoided. Therefore, the problem that the processing cost is influenced due to high roller consumption caused by steel piling and steel pressing accidents is solved, and the problem that the productivity is influenced due to long treatment time of the steel piling and steel pressing accidents is solved. By applying the anti-pressing control method provided by the embodiment, the processing time of the rolling strip steel of the finishing mill group in the abnormal state is shortened from about 90 minutes to about 26 minutes on average, and the accident time is shortened. The steel pressing accidents are avoided for 10 times per year, the accident time is saved for 10.6 hours, and the yield is increased by 6200 ton.
Based on the same inventive concept, the embodiment also provides a steel-pressing prevention control device. The anti-pinch control device is applied to strip steel finish rolling equipment, the strip steel finish rolling equipment comprises M rolling mills which are sequentially arranged, a loop is arranged between every two rolling mills, and M is an integer not less than 2. Fig. 2 is a schematic structural diagram of the crush prevention control device, which includes:
the signal receiving module 21 is used for receiving the steel-pressing prevention control signal;
the control module 22 is configured to, after receiving the anti-pinch control signal, maintain the front N-th rolling mill in a normal rolling state, control a roll gap between the (N + 1) -th rolling mill and the M-th rolling mill to be opened, decelerate the (N + 1) -th rolling mill and the M-th rolling mill, make the speeds of the (N + 1) -th rolling mill and the M-th rolling mill the same as the speed of the N-th rolling mill, and lower the loop located behind the N-th rolling mill to a waiting position, where N is a positive integer.
Further, the control module 22 is further configured to control the hot metal detector to detect whether the length of the remaining slab is greater than a preset length after receiving the anti-rolling control signal, and control the flying shears to cut off the remaining slab when the length of the remaining slab is greater than the preset length, where the remaining slab is a slab that does not enter the strip steel finish rolling equipment.
Further, the control module 22 is further configured to control the middle roller way to push out the residual slab after the control flying shears cut off the residual slab.
Further, the control module 22 is further configured to control the speed of the exit roller way of the mth rolling mill, the speed of the layer cooling roller way, and the speed of the coiler to match the speed of the mth rolling mill after receiving the anti-pinch control signal.
Since the anti-pinch steel control device is the device adopted by the anti-pinch steel control method, a person skilled in the art can understand the specific implementation mode of the anti-pinch steel control device and various modifications thereof based on the anti-pinch steel control method, and therefore, how to realize the anti-pinch steel control device is not described in detail here. The steel-pressing prevention control device adopted by the person skilled in the art to implement the steel-pressing prevention control method belongs to the protection scope of the present application.
In addition, this embodiment still provides a strip steel finish rolling equipment, strip steel finish rolling equipment includes the M rolling mills that arrange in proper order, is provided with the loop between every two rolling mills, and M is not less than 2 integer, and strip steel finish rolling equipment still includes as above the prevent suppressing steel controlling means. The strip steel finishing rolling equipment provided by the embodiment can effectively prevent the occurrence of steel pressing accidents in the strip steel rolling process. For the same reason, how to implement the anti-rolling control method in the present embodiment in the strip finishing mill will not be described in detail here.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The anti-pinch control method is applied to strip steel finish rolling equipment, the strip steel finish rolling equipment comprises M rolling mills which are sequentially arranged, a loop is arranged between every two rolling mills, and M is an integer not less than 2, and the anti-pinch control method is characterized by comprising the following steps:
after receiving the anti-pinch control signal, keeping the front N-frame rolling mill in a normal rolling state, controlling the roll gaps from the (N + 1) -th rolling mill to the M-th rolling mill to be opened, decelerating the (N + 1) -th rolling mill to the M-th rolling mill to enable the speeds of the (N + 1) -th rolling mill to the M-th rolling mill to be the same as the speed of the N-th rolling mill, and lowering the loop behind the N-th rolling mill to a waiting position, wherein N is a positive integer.
2. The pressure-resistant steel control method according to claim 1, further comprising, after receiving the pressure-resistant steel control signal:
controlling a hot metal detector to detect whether the length of a residual plate blank is greater than a preset length, wherein the residual plate blank is a plate blank which does not enter the strip steel finish rolling equipment;
and if the length of the residual slab is greater than the preset length, controlling a flying shear to cut off the residual slab.
3. The crush resistance control method as recited in claim 2, further comprising, after the controlling flying shears cut the residual slab:
and controlling the middle roller way to push out the residual plate blank.
4. The crush-proof control method as recited in claim 2, wherein the preset length is 4 m.
5. The crush-proof control method according to any one of claims 1 to 4, further comprising, after receiving the crush-proof control signal:
and controlling the speed of an outlet roller way of the M-th rolling mill, the speed of a laminar cooling roller way and the speed of the coiling machine to be matched with the speed of the M-th rolling mill.
6. The utility model provides a prevent suppressing controlling means, is applied to belted steel finish rolling equipment, belted steel finish rolling equipment is provided with the loop including the M rolling mills of arranging in proper order between per two rolling mills, and M is for being not less than 2 integer, its characterized in that, prevent suppressing controlling means includes:
the signal receiving module is used for receiving the steel pressing prevention control signal;
and the control module is used for keeping the front N rolling mills in a normal rolling state after receiving the anti-pinch control signal, controlling the roll gaps from the (N + 1) th rolling mill to the M-th rolling mill to be opened, decelerating the (N + 1) th rolling mill to the M-th rolling mill to enable the speeds of the (N + 1) th rolling mill to the M-th rolling mill to be the same as the speed of the N-th rolling mill, and descending the loop positioned behind the N-th rolling mill to a waiting position, wherein N is a positive integer.
7. The anti-pinch control device according to claim 6, wherein the control module is further used for controlling a hot metal detector to detect whether the length of a residual slab is greater than a preset length after receiving the anti-pinch control signal, and controlling a flying shear to cut off the residual slab when the length of the residual slab is greater than the preset length, wherein the residual slab is a slab which does not enter the strip finishing equipment.
8. The steel-crushing prevention control device of claim 7, wherein the control module is further used for controlling a middle roller way to push out the residual plate blank after the control flying shears cut off the residual plate blank.
9. The anti-pinch steel control device according to any one of claims 6 to 8, wherein the control module is further used for controlling the speed of an outlet roller way of the M-th rolling mill, the speed of a laminar cooling roller way and the speed of a coiler to be matched with the speed of the M-th rolling mill after receiving the anti-pinch steel control signal.
10. A finish rolling device for strip steel, which comprises M rolling mills arranged in sequence, wherein a loop is arranged between every two rolling mills, M is an integer not less than 2, and the finish rolling device is characterized by further comprising the steel-pressing-prevention control device as claimed in any one of claims 6 to 9.
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| CN115608777B (en) * | 2022-08-15 | 2024-11-01 | 广西广盛新材料科技有限公司 | Control method, device and equipment for strip steel production and strip steel production system |
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