CN117259451A - Real-time tension control method and device in crimping process - Google Patents
Real-time tension control method and device in crimping process Download PDFInfo
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- CN117259451A CN117259451A CN202311288578.7A CN202311288578A CN117259451A CN 117259451 A CN117259451 A CN 117259451A CN 202311288578 A CN202311288578 A CN 202311288578A CN 117259451 A CN117259451 A CN 117259451A
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- 238000000034 method Methods 0.000 title claims abstract description 128
- 238000002788 crimping Methods 0.000 title claims description 57
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 172
- 239000010959 steel Substances 0.000 claims abstract description 172
- 238000004804 winding Methods 0.000 claims abstract description 143
- 238000005096 rolling process Methods 0.000 claims abstract description 115
- 230000003811 curling process Effects 0.000 claims abstract description 37
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 238000004891 communication Methods 0.000 claims description 21
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 7
- 230000001276 controlling effect Effects 0.000 description 23
- 230000000875 corresponding effect Effects 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000012886 linear function Methods 0.000 description 2
- 239000002436 steel type Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000011022 operating instruction 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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression 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
-
- 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
Abstract
The invention discloses a real-time tension control method and a device in a curling process, wherein the control method comprises the following steps: determining a thickness threshold value of the curled steel strip according to the composition characteristics of the steel grade; determining a starting tension and an ending tension of a coiling process and a first rolling diameter threshold and a second rolling diameter threshold of the steel strip on the winding drum according to the thickness threshold and the actual thickness of the coiled steel strip, wherein the starting tension is smaller than the ending tension, and the first rolling diameter threshold is smaller than the second rolling diameter threshold; and controlling the real-time tension in the coiling process to gradually increase from the start tension when the actual coil diameter of the steel strip on the coiling drum is equal to the first coil diameter threshold value to the end tension when the actual coil diameter is equal to the second coil diameter threshold value according to the first coil diameter threshold value, the second coil diameter threshold value and the start tension and the end tension. Compared with the prior art, the invention eliminates the defect that the tension is instantaneously increased to the tension given value.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a real-time tension control method and device in a curling process.
Background
In the steel rolling field, the curling of the oriented silicon steel with high silicon content and larger brittleness has the following characteristics: before crimping, firstly welding a guide belt at the front part of the belt head; then winding the head of the steel belt on a winding drum and curling for a plurality of circles; finally, the steel strip is gradually curled onto the reel.
In order to ensure smooth proceeding of the curling process and that the obtained coil shape meets the quality requirement, a tension given value is provided for the steel belt in the moment (within 1 s) in the early stage of the curling process, and the tension given value is kept for curling. However, the steel strip is subjected to a large tensile force instantaneously, so that on the one hand, the weld between the head and the lead of the steel strip is easily broken, and on the other hand, the steel strip may be broken due to the instantaneous increase of the tensile force.
Disclosure of Invention
The present invention has been made in view of the above problems, and provides a real-time tension control method and apparatus, a computing device, and a computer storage medium in a crimping process that overcomes or at least partially solves the above problems.
According to one aspect of the present invention, there is provided a real-time tension control method in a crimping process, comprising:
determining a thickness threshold value of the curled steel strip according to the composition characteristics of the steel grade;
Determining a starting tension and an ending tension of a coiling process and a first rolling diameter threshold and a second rolling diameter threshold of the steel strip on the winding drum according to the thickness threshold and the actual thickness of the coiled steel strip, wherein the starting tension is smaller than the ending tension, and the first rolling diameter threshold is smaller than the second rolling diameter threshold;
and controlling the real-time tension in the coiling process to gradually increase from the start tension when the actual coil diameter of the steel strip on the coiling drum is equal to the first coil diameter threshold value to the end tension when the actual coil diameter is equal to the second coil diameter threshold value according to the first coil diameter threshold value, the second coil diameter threshold value and the start tension and the end tension.
Further, according to the first roll diameter threshold and the second roll diameter threshold, and the start tension and the end tension, controlling the real-time tension in the coiling process to gradually increase from the start tension when the actual roll diameter of the steel strip on the reel is equal to the first roll diameter threshold to the end tension when the actual roll diameter is equal to the second roll diameter threshold further includes:
calculating to obtain real-time tension in the curling process according to the first rolling diameter threshold value and the second rolling diameter threshold value and the starting tension and the ending tension;
calculating and obtaining theoretical output current of the curling motor corresponding to the real-time tension according to the real-time tension;
And controlling the curling motor according to the theoretical output current to enable the real-time output current of the curling motor to be equal to the theoretical output current.
Further, the calculating the real-time tension in the curling process according to the first winding diameter threshold value and the second winding diameter threshold value, and the starting tension and the ending tension specifically includes:
setting the first rolling diameter threshold value as D 0 The second roll diameter threshold value is D 1 The actual winding diameter of the steel belt on the winding drum is D, and the tension given value is T Feeding of The initial tension of the crimping process is T Feeding of X%, end tension of crimping process T Feeding of Y%, the real-time tension T during crimping is calculated by:
further, the calculating, according to the real-time tension, the theoretical output current of the curl motor corresponding to the real-time tension further includes:
calculating the mechanical torque of the curling motor according to the real-time tension and the actual rolling diameter of the steel belt on the winding drum;
and calculating the theoretical output current of the curling motor corresponding to the real-time tension according to the fact that the mechanical torque of the curling motor is equal to the output torque of the curling motor.
Further, according to the thickness threshold value and the actual thickness of the curled steel belt, determining a first rolling diameter threshold value and a second rolling diameter threshold value of the steel belt on the winding drum specifically comprises: if the actual thickness of the curled steel belt is larger than the thickness threshold, the first rolling diameter threshold of the steel belt on the winding drum is 518mm, and the second rolling diameter threshold of the steel belt on the winding drum is 580mm; otherwise, the first rolling diameter threshold value of the steel belt on the winding drum is 520mm, and the second rolling diameter threshold value of the steel belt on the winding drum is 600mm;
Determining the starting tension and the ending tension of the curling process according to the thickness threshold value and the actual thickness of the curled steel belt comprises the following steps: if the actual thickness of the curled steel strip is greater than the thickness threshold, the initial tension of the curling process is T Feeding of 10% end tension of crimping process T Feeding of 75%; conversely, the initial tension of the crimping process is T Feeding of 15% end tension of crimping process T Feeding of ·100％；
The thickness threshold value of the curled steel band in tension control is determined according to the composition characteristics of the steel grade: if the steel grade is silicon steel with silicon content more than 3%, the thickness threshold value of the curled steel belt is 2mm.
Further, after determining the start tension and the end tension of the coiling process, and the first diameter threshold and the second diameter threshold of the steel strip on the reel, according to the thickness threshold and the actual thickness of the coiled steel strip, the method further comprises:
and if the actual winding diameter of the steel strip on the winding drum is smaller than the first winding diameter threshold value, controlling the real-time tension in the winding process to be equal to the starting tension.
Further, after determining the start tension and the end tension of the coiling process, and the first diameter threshold and the second diameter threshold of the steel strip on the reel, according to the thickness threshold and the actual thickness of the coiled steel strip, the method further comprises:
And if the actual winding diameter of the steel strip on the winding drum is larger than the second winding diameter threshold value, controlling the real-time tension in the winding process to be equal to the ending tension.
According to another aspect of the present invention, there is provided a real-time tension control device in a crimping process, comprising:
a first determining module for determining a thickness threshold of the curled steel strip according to the composition characteristics of the steel grade;
the second determining module is used for determining the starting tension and the ending tension of the coiling process and the first coiling diameter threshold value and the second coiling diameter threshold value of the steel strip on the coiling drum according to the thickness threshold value and the actual thickness of the coiled steel strip, wherein the starting tension is smaller than the ending tension, and the first coiling diameter threshold value is smaller than the second coiling diameter threshold value;
and the real-time tension control module is used for controlling the real-time tension in the curling process to gradually increase from the start tension when the actual rolling diameter of the steel strip on the winding drum is equal to the first rolling diameter threshold to the end tension when the actual rolling diameter is equal to the second rolling diameter threshold according to the first rolling diameter threshold, the second rolling diameter threshold and the start tension and the end tension.
According to yet another aspect of the present invention, there is provided a computing device comprising: the device comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete communication with each other through the communication bus;
The memory is used for storing at least one executable instruction, and the executable instruction enables the processor to execute the operation corresponding to the real-time tension control method in the curling process.
According to still another aspect of the present invention, there is provided a computer storage medium having stored therein at least one executable instruction for causing a processor to perform operations corresponding to the real-time tension control method in the crimping process described above.
According to the real-time tension control method and the device in the curling process, the first winding diameter threshold value of the steel belt on the winding drum at the beginning of tension control and the second winding diameter threshold value of the steel belt on the winding drum at the end of tension control are determined, so that the moment of beginning the tension control can be determined according to the winding diameter of the steel belt on the winding drum, and the real-time tension can be controlled to gradually increase from the beginning tension to the ending tension after the beginning of the tension control; compared with the prior art, the invention eliminates the defect that the tension is instantaneously increased to the tension given value.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic flow chart of a real-time tension control method in a curling process according to an embodiment of the invention;
FIG. 2 shows a schematic diagram of a curl motor rotating a spool;
FIG. 3 illustrates one example of a real-time tension control method during crimping;
FIG. 4 shows a schematic representation of tension as a function of actual coil diameter during crimping;
FIG. 5 shows a schematic of a real-time tension control device during crimping in accordance with an embodiment of the present invention;
FIG. 6 illustrates a schematic diagram of a computing device provided by an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
FIG. 1 illustrates a flow chart of a method of real-time tension control in a crimping process of the present invention for use in a computing device in accordance with an embodiment. The computing device includes: the device comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete communication with each other through the communication bus; the memory is used for storing at least one executable instruction, and the executable instruction enables the processor to execute the operation corresponding to the real-time tension control method in the crimping process. As shown in fig. 1, the method comprises the steps of:
s01: determining a thickness threshold value of the curled steel strip according to the composition characteristics of the steel grade;
s02: determining a starting tension and an ending tension of a coiling process and a first rolling diameter threshold and a second rolling diameter threshold of the steel strip on the winding drum according to the thickness threshold and the actual thickness of the coiled steel strip, wherein the starting tension is smaller than the ending tension, and the first rolling diameter threshold is smaller than the second rolling diameter threshold;
s03: and controlling the real-time tension in the coiling process to gradually increase from the start tension when the actual coil diameter of the steel strip on the coiling drum is equal to the first coil diameter threshold value to the end tension when the actual coil diameter is equal to the second coil diameter threshold value according to the first coil diameter threshold value, the second coil diameter threshold value and the start tension and the end tension.
In the prior art, in order to ensure smooth proceeding of the curling process and the obtained coil shape of the steel coil meets the quality requirement, a tension given value is provided for the steel belt in the moment (within 1 s) at the early stage of the curling process, and the tension given value is maintained in the curling process; however, when the steel belt is subjected to high tension instantaneously, the defects of weld fracture or steel belt breakage can occur. The embodiment eliminates the disadvantage of instantaneously establishing tension in the prior art by controlling the real-time tension in the crimping process to gradually increase from the start tension to the end tension.
Specifically, in this embodiment, the thickness threshold of the curled steel strip is determined according to the composition characteristics of the steel grade, where the thickness threshold of the curled steel strip may be 1 specific thickness data, for example, 2mm, or more than 1 specific thickness data; then comparing the actual thickness of the curled steel strip with a thickness threshold value to obtain a first winding diameter threshold value, a second winding diameter threshold value, a starting tension and an ending tension which correspond to the actual thickness; and finally, controlling the actual tension in the curling to gradually increase from the starting tension when the actual rolling diameter is equal to the first rolling diameter threshold value to the ending tension when the actual rolling diameter is equal to the second rolling diameter threshold value according to the first rolling diameter threshold value, the second rolling diameter threshold value, the starting tension and the ending tension.
Again, the description: the thickness threshold of the coiled steel strip may be related to the production requirements in addition to the compositional characteristics of the steel grade; taking the thickness threshold value of the curled steel strip as 1 specific thickness data as an example, in combination with the actual thickness of the curled steel strip, the case where the actual thickness is greater than the thickness threshold value, the case where the actual thickness is equal to the thickness threshold value, and the case where the actual thickness is less than the thickness threshold value may occur; therefore, according to different situations, a first roll diameter threshold value, a second roll diameter threshold value, a start tension and an end tension corresponding to the actual thickness can be determined; further, according to the determined first winding diameter threshold value, second winding diameter threshold value, start tension and end tension, the actual tension in the winding can be controlled to gradually increase from the start tension when the actual winding diameter is equal to the first winding diameter threshold value to the end tension when the actual winding diameter is equal to the second winding diameter threshold value.
Finally, the control of the real-time tension during crimping is embodied as: when the actual winding diameter of the steel strip on the winding drum is equal to the first winding diameter threshold value, controlling the real-time tension to be equal to the starting tension, gradually increasing the real-time tension along with the increase of the actual winding diameter, and when the actual winding diameter is increased to be equal to the second winding diameter threshold value, controlling the real-time tension to be increased to be equal to the ending tension.
In an alternative manner, controlling the real-time tension in the coiling process to gradually increase from the start tension when the actual diameter of the steel strip on the reel is equal to the first diameter threshold to the end tension when the actual diameter is equal to the second diameter threshold in step S03 according to the first diameter threshold and the second diameter threshold, and the start tension and the end tension further includes:
calculating to obtain real-time tension in the curling process according to the first rolling diameter threshold value and the second rolling diameter threshold value and the starting tension and the ending tension;
calculating and obtaining theoretical output current of the curling motor corresponding to the real-time tension according to the real-time tension;
and controlling the curling motor according to the theoretical output current to enable the real-time output current of the curling motor to be equal to the theoretical output current.
Specifically, in this embodiment, the control of the real-time tension in the crimping process is achieved by controlling the crimping motor. When the method is implemented, firstly, calculating to obtain real-time tension in the curling process according to a first rolling diameter threshold value, a second rolling diameter threshold value, a start tension and an end tension; then according to the real-time tension, calculating to obtain the theoretical output current of the curling motor corresponding to the real-time tension, wherein the theoretical output current of the curling motor corresponding to the real-time tension is a series of current values as the real-time tension is gradually increased in the process that the actual curling diameter is increased from the first curling diameter threshold value to the second curling diameter threshold value; and finally, controlling the curling motor according to the calculated theoretical output current to enable the real-time output current of the curling motor to be equal to the theoretical output current.
In an optional manner, the calculating the real-time tension in the curling process according to the first winding diameter threshold value and the second winding diameter threshold value and the starting tension and the ending tension specifically includes:
setting the first rolling diameter threshold value as D 0 The second roll diameter threshold value is D 1 The actual winding diameter of the steel belt on the winding drum is D, and the tension given value is T Feeding of The initial tension of the crimping process is T Feeding of X%, end tension of crimping process T Feeding of Y%, the real-time tension T during crimping is calculated by:
specifically, as shown in fig. 2, the winding drum is driven by the curling motor M so as to roll the steel strip on the curling motor, and the real-time tension T is a linear function positively correlated with the actual rolling diameter D during the curling process.
From the foregoing, it is understood that the first rolling diameter threshold D can be obtained based on the thickness threshold and the actual thickness of the rolled steel strip 0 Second roll diameter threshold D 1 Start tension T Feeding of X% and end tension T Feeding of ·y% and tension set point T Feeding of The real-time tension is obtained according to the actual winding diameter D at different moments by taking the actual winding diameter D as an unknown quantity in a calculation formula of the real-time tension.
In an alternative manner, according to the real-time tension, calculating the theoretical output current of the curling motor corresponding to the real-time tension further comprises:
Calculating the mechanical torque of the curling motor according to the real-time tension and the actual rolling diameter of the steel belt on the winding drum;
and calculating the theoretical output current of the curling motor corresponding to the real-time tension according to the fact that the mechanical torque of the curling motor is equal to the output torque of the curling motor.
In particular, this example illustrates a method of calculating a theoretical output current based on real-time tension.
Firstly, calculating the mechanical torque of a curling motor according to the real-time tension and the actual rolling diameter of a steel belt on a winding drum, and setting the mechanical torque of the curling motor as l M The transmission gear ratio of the curling motor is G r Mechanical torque l of the curling motor M The method is calculated by the following formula:
setting the output torque of the curling motor to be l E The theoretical output current of the curling motor is I, the torque constant of the motor is beta, and the gravity coefficient is g, so that the output torque l of the curling motor E The method is calculated by the following formula:
when the curling motor is in a stable ideal state, the output torque of the curling motor is equal to the mechanical torque of the curling motor, i.e. l E ＝l M Thereby the theoretical output current I of the curling motor can be calculated:
through the analysis reasoning, the theoretical output current can be obtained according to the real-time tension D in the curling process, and conversely, in the curling process, the curling motor is controlled to make the real-time output current of the curling motor equal to the theoretical output current I, so that the tension born by the steel belt is equal to the real-time tension D.
In an alternative manner, the first rolling diameter threshold value and the second rolling diameter threshold value of the steel strip on the winding drum are determined according to the thickness threshold value and the actual thickness of the curled steel strip, and specifically: if the actual thickness of the curled steel belt is larger than the thickness threshold, the first rolling diameter threshold of the steel belt on the winding drum is 518mm, and the second rolling diameter threshold of the steel belt on the winding drum is 580mm; otherwise, the first rolling diameter threshold value of the steel belt on the winding drum is 520mm, and the second rolling diameter threshold value of the steel belt on the winding drum is 600mm;
determining the starting tension and the ending tension of the curling process according to the thickness threshold value and the actual thickness of the curled steel belt comprises the following steps: if the actual thickness of the curled steel strip is greater than the thickness threshold, the initial tension of the curling process is T Feeding of 10% end tension of crimping process T Feeding of 75%; conversely, the initial tension of the crimping process is T Feeding of 15% end tension of crimping process T Feeding of ·100％；
The thickness threshold value of the curled steel band in tension control is determined according to the composition characteristics of the steel grade: if the steel grade is silicon steel with silicon content more than 3%, the thickness threshold value of the curled steel belt is 2mm.
Specifically, as shown in fig. 3, taking a case where the thickness threshold value of the rolled steel strip is 2mm as an example, this embodiment sets two control procedures, and adopts the tension control method corresponding to procedure 1 when the actual thickness of the rolled steel strip is greater than 2mm, and adopts the tension control method corresponding to procedure 2 when the actual thickness of the rolled steel strip is less than or equal to 2mm.
In the control method corresponding to the program 1, the first winding diameter threshold value is 518mm, the second winding diameter threshold value is 580mm, namely when the actual winding diameter is larger than the first winding diameter threshold value, the actual tension is gradually increased from the initial tension to 10% of a tension given value, when the actual winding diameter is equal to the second winding diameter threshold value, the actual tension is increased to be equal to the end tension, and the end tension is 75% of the tension given value, so that tension control on the curled steel strip with the actual thickness larger than the thickness threshold value in the curling process is realized.
In the control method corresponding to the program 2, the first rolling diameter threshold value is 520mm, the second rolling diameter threshold value is 600mm, namely when the actual rolling diameter is larger than the first rolling diameter threshold value, the actual tension is gradually increased from the initial tension to 15% of a tension given value, when the actual rolling diameter is equal to the second rolling diameter threshold value, the actual tension is increased to be equal to the end tension, and the end tension is 100% of the tension given value, so that tension control on the curled steel strip with the actual thickness smaller than or equal to the thickness threshold value in the curling process is realized.
In one alternative, after determining the start tension and the end tension of the coiling process, and the first diameter threshold and the second diameter threshold of the steel strip on the reel, based on the thickness threshold and the actual thickness of the coiled steel strip, the method further comprises: and if the actual winding diameter of the steel strip on the winding drum is smaller than the first winding diameter threshold value, controlling the real-time tension in the winding process to be equal to the starting tension.
After determining the start tension and the end tension of the coiling process, and the first diameter threshold and the second diameter threshold of the steel strip on the reel, based on the thickness threshold and the actual thickness of the coiled steel strip, the method further comprises: and if the actual winding diameter of the steel strip on the winding drum is larger than the second winding diameter threshold value, controlling the real-time tension in the winding process to be equal to the ending tension.
From the foregoing, when the actual winding diameter is greater than the first winding diameter threshold and smaller than the second winding diameter threshold, the real-time tension is controlled to gradually increase from the start tension to the end tension; in the rolling process, the actual rolling diameter of the steel strip on the winding drum is gradually increased, and the real-time tension is also required to be controlled in the early stage of rolling (the stage that the actual rolling diameter is smaller than the first rolling diameter threshold value) and the later stage of rolling (the stage that the actual rolling diameter is larger than the second rolling diameter threshold value) so as to ensure the smooth rolling process.
Specifically, as shown in fig. 4, during the crimping process, the ratio of the real-time tension to the tension set point is raised to 100% in a short time in the prior art, and in the case that the tension set point is determined, that is, the real-time tension is raised to be equal to the tension set point in a short time in the prior art, and the real-time tension is kept to be equal to the tension set point in the crimping process, the suddenly increased pulling force is easy to cause the weld seam to split or the steel strip to break.
In the early stage when the actual winding diameter is smaller than the first winding diameter threshold value, the real-time tension is controlled to be equal to the starting tension, so that the defect of instantaneously establishing the tension is overcome; in the middle stage that the actual winding diameter is larger than the first winding diameter threshold value and smaller than the second winding diameter threshold value, the real-time tension is controlled to be linearly increased from the starting tension to the ending tension, in the later stage that the actual winding diameter is larger than the second winding diameter threshold value, the real-time tension is controlled to be equal to the ending tension, the welding line is wound into a winding drum at the stage, the winding radian is smaller and smaller, and the bending deformation degree of the steel belt is smaller, so that the larger real-time tension cannot cause the cracking of the steel belt.
After the tension control method provided by the embodiment of the invention is applied to twenty-roller mill production, the breakage condition in the curling process of the ultra-high grade non-oriented silicon steel and the high magnetic induction oriented silicon steel with the silicon content of more than 3.0% is greatly reduced, the belt head part can be reliably wound into a winding drum, the operation of a tension control system is stable, the yield and the production efficiency are improved, and the safety risk of on-site operators is also reduced to a certain extent.
The embodiment of the invention eliminates the defect of instantaneously establishing tension, can set related parameters such as the size and the speed of gradual change of the tension in real time according to the steel types with different thicknesses and different components, effectively reduces the condition that the belt head is easy to break when the steel belt is curled, and has good implementation effect and general applicability to production situations requiring curling and rolling by proving the control method.
Fig. 5 shows a schematic structural diagram of a real-time tension control device in a crimping process according to the present invention. As shown in fig. 5, the apparatus includes: a first determination module 01, a second determination module 02 and a real-time tension control module 03, wherein:
the first determining module 01 is used for determining a thickness threshold value of the curled steel belt according to the composition characteristics of the steel grade;
the second determining module 02 is configured to determine a start tension and an end tension of a rolling process, and a first roll diameter threshold and a second roll diameter threshold of the steel strip on the reel according to the thickness threshold and an actual thickness of the rolled steel strip, where the start tension is less than the end tension, and the first roll diameter threshold is less than the second roll diameter threshold;
the real-time tension control module 03 is configured to control, according to the first roll diameter threshold and the second roll diameter threshold, and the start tension and the end tension, the real-time tension in the coiling process to gradually increase from the start tension when the actual roll diameter of the steel strip on the reel is equal to the first roll diameter threshold to the end tension when the actual roll diameter is equal to the second roll diameter threshold.
The embodiment eliminates the disadvantage of instantaneously establishing tension in the prior art by controlling the real-time tension in the crimping process to gradually increase from the start tension to the end tension.
Specifically, in this embodiment, the thickness threshold of the curled steel strip is determined according to the composition characteristics of the steel grade, where the thickness threshold of the curled steel strip may be 1 specific thickness data, for example, 2mm, or more than 1 specific thickness data; then comparing the actual thickness of the curled steel strip with a thickness threshold value to obtain a first winding diameter threshold value, a second winding diameter threshold value, a starting tension and an ending tension which correspond to the actual thickness; and finally, controlling the actual tension in the curling to gradually increase from the starting tension when the actual rolling diameter is equal to the first rolling diameter threshold value to the ending tension when the actual rolling diameter is equal to the second rolling diameter threshold value according to the first rolling diameter threshold value, the second rolling diameter threshold value, the starting tension and the ending tension.
Again, the description: the thickness threshold of the coiled steel strip may be related to production requirements in addition to the compositional characteristics of the steel grade.
Finally, the control of the real-time tension during crimping is embodied as: when the actual winding diameter of the steel strip on the winding drum is equal to the first winding diameter threshold value, controlling the real-time tension to be equal to the starting tension, gradually increasing the real-time tension along with the increase of the actual winding diameter, and when the actual winding diameter is increased to be equal to the second winding diameter threshold value, controlling the real-time tension to be increased to be equal to the ending tension.
In an alternative manner, the real-time tension control module 03 controls the real-time tension in the coiling process to gradually increase from the start tension when the actual coil diameter of the steel strip on the reel is equal to the first coil diameter threshold to the end tension when the actual coil diameter is equal to the second coil diameter threshold according to the first coil diameter threshold and the second coil diameter threshold, and the start tension and the end tension further includes:
the real-time tension control module 03 calculates and obtains real-time tension in the curling process according to the first rolling diameter threshold value and the second rolling diameter threshold value, and the starting tension and the ending tension;
the real-time tension control module 03 calculates and obtains the theoretical output current of the curling motor corresponding to the real-time tension according to the real-time tension;
the real-time tension control module 03 controls the curling motor according to the theoretical output current, so that the real-time output current of the curling motor is equal to the theoretical output current.
Specifically, in this embodiment, the real-time tension control module 03 controls the real-time tension in the curling process by controlling the curling motor.
In an optional manner, the real-time tension control module 03 calculates, according to the first winding diameter threshold value and the second winding diameter threshold value, and the start tension and the end tension, a real-time tension in the winding process specifically includes:
Setting the first rolling diameter threshold value as D 0 The second roll diameter threshold value is D 1 The actual winding diameter of the steel belt on the winding drum is D, and the tension given value is T Feeding of The initial tension of the crimping process is T Feeding of X%, end tension of crimping process T Feeding of Y%, the real-time tension T during crimping is calculated by:
in particular, the reel is driven by a crimping motor M so as to roll the steel strip on the crimping motor, the real-time tension T being a linear function positively correlated with the actual rolling diameter D during crimping.
From the foregoing, it is understood that the first rolling diameter threshold D can be obtained based on the thickness threshold and the actual thickness of the rolled steel strip 0 Second roll diameter threshold D 1 Start tension T Feeding of X% and end tension T Feeding of Y%, while the tension set point T Feeding of The real-time tension is obtained according to the actual winding diameter D at different moments by taking the actual winding diameter D as an unknown quantity in a calculation formula of the real-time tension.
In an alternative manner, the calculating, by the real-time tension control module 03, the theoretical output current of the curl motor corresponding to the real-time tension according to the real-time tension further includes:
the real-time tension control module 03 calculates the mechanical torque of the curling motor according to the real-time tension and the actual rolling diameter of the steel belt on the winding drum;
And the real-time tension control module 03 calculates the theoretical output current of the curling motor corresponding to the real-time tension according to the fact that the mechanical torque of the curling motor is equal to the output torque of the curling motor.
Specifically, this embodiment describes a method in which the real-time tension control module 03 calculates a theoretical output current based on the real-time tension.
Firstly, a real-time tension control module 03 calculates the mechanical torque of a curling motor according to the real-time tension and the actual rolling diameter of a steel belt on a winding drum, and sets the mechanical torque of the curling motor as l M The transmission gear ratio of the curling motor is G r Mechanical torque l of the curling motor M The method is calculated by the following formula:
setting the output torque of the curling motor to be l E CrimpingThe theoretical output current of the motor is I, the torque constant of the motor is beta, and the gravity coefficient is g, so that the output torque l of the curled motor is E The method is calculated by the following formula:
when the curling motor is in a stable ideal state, the output torque of the curling motor is equal to the mechanical torque of the curling motor, i.e. l E ＝l M Thereby the theoretical output current I of the curling motor can be calculated:
through the analysis reasoning, the theoretical output current can be obtained according to the real-time tension D in the curling process, and conversely, in the curling process, the curling motor is controlled to make the real-time output current of the curling motor equal to the theoretical output current I, so that the tension born by the steel belt is equal to the real-time tension D.
In an alternative manner, the second determining module 02 determines, according to the thickness threshold value and the actual thickness of the coiled steel strip, a first rolling diameter threshold value and a second rolling diameter threshold value of the steel strip on the reel specifically as follows: if the actual thickness of the curled steel belt is larger than the thickness threshold, the first rolling diameter threshold of the steel belt on the winding drum is 518mm, and the second rolling diameter threshold of the steel belt on the winding drum is 580mm; otherwise, the first rolling diameter threshold value of the steel belt on the winding drum is 520mm, and the second rolling diameter threshold value of the steel belt on the winding drum is 600mm;
the second determining module 02 determines, according to the thickness threshold and the actual thickness of the curled steel strip, the starting tension and the ending tension of the curling process specifically as follows: if the actual thickness of the curled steel strip is greater than the thickness threshold, the initial tension of the curling process is T Feeding of 10% end tension of crimping process T Feeding of 75%; conversely, the initial tension of the crimping process is T Feeding of 15% end tension of crimping process T Feeding of ·100％；
The thickness threshold value of the curled steel band in tension control is determined according to the composition characteristics of the steel grade: if the steel grade is silicon steel with silicon content more than 3%, the thickness threshold value of the curled steel belt is 2mm.
In an alternative way, if the actual coil diameter of the steel strip on the coil is smaller than the first coil diameter threshold value, the real-time tension control module 03 controls the real-time tension in the coiling process to be equal to the starting tension.
And if the actual winding diameter of the steel strip on the winding drum is larger than the second winding diameter threshold value, the real-time tension control module 03 controls the real-time tension in the winding process to be equal to the ending tension.
From the foregoing, when the actual winding diameter is greater than the first winding diameter threshold and smaller than the second winding diameter threshold, the real-time tension is controlled to gradually increase from the start tension to the end tension; in the rolling process, the actual rolling diameter of the steel strip on the winding drum is gradually increased, and the real-time tension is also required to be controlled in the early stage of rolling (the stage that the actual rolling diameter is smaller than the first rolling diameter threshold value) and the later stage of rolling (the stage that the actual rolling diameter is larger than the second rolling diameter threshold value) so as to ensure the smooth rolling process.
In the early stage when the actual winding diameter is smaller than the first winding diameter threshold value, the real-time tension is controlled to be equal to the starting tension, so that the defect of instantaneously establishing the tension is overcome; in the middle stage that the actual winding diameter is larger than the first winding diameter threshold value and smaller than the second winding diameter threshold value, the real-time tension is controlled to be linearly increased from the starting tension to the ending tension, in the later stage that the actual winding diameter is larger than the second winding diameter threshold value, the real-time tension is controlled to be equal to the ending tension, the welding line is wound into a winding drum at the stage, the winding radian is smaller and smaller, and the bending deformation degree of the steel belt is smaller, so that the larger real-time tension cannot cause the cracking of the steel belt.
After the tension control method provided by the embodiment of the invention is applied to twenty-roller mill production, the breakage condition in the curling process of the ultra-high grade non-oriented silicon steel and the high magnetic induction oriented silicon steel with the silicon content of more than 3.0% is greatly reduced, the belt head part can be reliably wound into a winding drum, the operation of a tension control system is stable, the yield and the production efficiency are improved, and the safety risk of on-site operators is also reduced to a certain extent.
The embodiment of the invention eliminates the defect of instantaneously establishing tension, can set related parameters such as the size and the speed of gradual change of the tension in real time according to the steel types with different thicknesses and different components, effectively reduces the condition that the belt head is easy to break when the steel belt is curled, and has good implementation effect and general applicability to production situations requiring curling and rolling by proving the control method.
Embodiments of the present invention provide a non-volatile computer storage medium having stored thereon at least one executable instruction for performing the method of controlling real-time tension during crimping in any of the method embodiments described above.
FIG. 6 illustrates a schematic diagram of one embodiment of a computing device, and embodiments of the invention are not limited to a particular implementation of a computing device.
As shown in fig. 6, the computing device may include: a processor 402, a communication interface (Communications Interface) 404, a memory 406, and a communication bus 408.
Wherein: processor 402, communication interface 404, and memory 406 communicate with each other via communication bus 408. A communication interface 404 for communicating with network elements of other devices, such as clients or other servers. Processor 402 is configured to execute program 410 and may specifically perform the relevant steps described above in connection with embodiments of a method for real-time tension control during crimping of a computing device.
In particular, program 410 may include program code including computer-operating instructions.
The processor 402 may be a central processing unit CPU, or a specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement embodiments of the present invention. The real-time tension control device during crimping may include one or more processors, which may be the same type of processor, such as one or more CPUs; but may also be different types of processors such as one or more CPUs and one or more ASICs.
Memory 406 for storing programs 410. Memory 406 may comprise high-speed RAM memory or may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
Program 410 may be specifically configured to cause processor 402 to perform the real-time tension control method during crimping in any of the method embodiments described above.
The algorithms or displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. Various general-purpose systems may also be used with the teachings herein. The required structure for a construction of such a system is apparent from the description above. In addition, embodiments of the present invention are not directed to any particular programming language. It will be appreciated that the teachings of the present invention described herein may be implemented in a variety of programming languages, and the above description of specific languages is provided for disclosure of enablement and best mode of the present invention.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the above description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.
Various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that some or all of the functionality of some or all of the components according to embodiments of the present invention may be implemented in practice using a microprocessor or Digital Signal Processor (DSP). The present invention can also be implemented as an apparatus or device program (e.g., a computer program and a computer program product) for performing a portion or all of the methods described herein. Such a program embodying the present invention may be stored on a computer readable medium, or may have the form of one or more signals. Such signals may be downloaded from an internet website, provided on a carrier signal, or provided in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specifically stated.
Claims (10)
1. A method of real-time tension control during crimping, comprising:
determining a thickness threshold value of the curled steel strip according to the composition characteristics of the steel grade;
Determining a starting tension and an ending tension of a coiling process and a first rolling diameter threshold and a second rolling diameter threshold of the steel strip on the winding drum according to the thickness threshold and the actual thickness of the coiled steel strip, wherein the starting tension is smaller than the ending tension, and the first rolling diameter threshold is smaller than the second rolling diameter threshold;
and controlling the real-time tension in the coiling process to gradually increase from the start tension when the actual coil diameter of the steel strip on the coiling drum is equal to the first coil diameter threshold value to the end tension when the actual coil diameter is equal to the second coil diameter threshold value according to the first coil diameter threshold value, the second coil diameter threshold value and the start tension and the end tension.
2. The method of claim 1, wherein controlling the real-time tension during the coiling from the start tension when the actual coil diameter of the steel strip on the reel is equal to the first coil diameter threshold to the end tension when the actual coil diameter is equal to the second coil diameter threshold based on the first and second coil diameter thresholds and the start tension and the end tension further comprises:
calculating to obtain real-time tension in the curling process according to the first rolling diameter threshold value and the second rolling diameter threshold value and the starting tension and the ending tension;
Calculating and obtaining theoretical output current of the curling motor corresponding to the real-time tension according to the real-time tension;
and controlling the curling motor according to the theoretical output current to enable the real-time output current of the curling motor to be equal to the theoretical output current.
3. The method according to claim 2, wherein the calculating the real-time tension in the crimping process according to the first and second roll diameter thresholds and the start and end tensions is specifically:
setting the first rolling diameter threshold value as D 0 The second roll diameter threshold value is D 1 The actual winding diameter of the steel belt on the winding drum is D, and the tension given value is T Feeding of The initial tension of the crimping process is T Feeding of X%, end tension of crimping process T Feeding of Y%, the real-time tension T during crimping is calculated by:
4. the method of claim 2, wherein calculating a theoretical output current of the curl motor corresponding to the real-time tension according to the real-time tension further comprises:
calculating the mechanical torque of the curling motor according to the real-time tension and the actual rolling diameter of the steel belt on the winding drum;
and calculating the theoretical output current of the curling motor corresponding to the real-time tension according to the fact that the mechanical torque of the curling motor is equal to the output torque of the curling motor.
5. The method according to claim 1, characterized in that determining the first and second reel diameter thresholds of the steel strip on the reel based on the thickness threshold and the actual thickness of the coiled steel strip is specifically: if the actual thickness of the curled steel belt is larger than the thickness threshold, the first rolling diameter threshold of the steel belt on the winding drum is 518mm, and the second rolling diameter threshold of the steel belt on the winding drum is 580mm; otherwise, the first rolling diameter threshold value of the steel belt on the winding drum is 520mm, and the second rolling diameter threshold value of the steel belt on the winding drum is 600mm;
determining the starting tension and the ending tension of the curling process according to the thickness threshold value and the actual thickness of the curled steel belt comprises the following steps: if the actual thickness of the curled steel strip is greater than the thickness threshold, the initial tension of the curling process is T Feeding of 10% end tension of crimping process T Feeding of 75%; conversely, the initial tension of the crimping process is T Feeding of 15% end tension of crimping process T Feeding of ·100％；
The thickness threshold value of the curled steel band in tension control is determined according to the composition characteristics of the steel grade: if the steel grade is silicon steel with silicon content more than 3%, the thickness threshold value of the curled steel belt is 2mm.
6. The method of claim 1, wherein after determining the start tension and the end tension of the coiling process, and the first diameter threshold and the second diameter threshold of the steel strip on the reels, based on the thickness threshold and the actual thickness of the coiled steel strip, the method further comprises:
And if the actual winding diameter of the steel strip on the winding drum is smaller than the first winding diameter threshold value, controlling the real-time tension in the winding process to be equal to the starting tension.
7. The method of claim 1, wherein after determining the start tension and the end tension of the coiling process, and the first diameter threshold and the second diameter threshold of the steel strip on the reels, based on the thickness threshold and the actual thickness of the coiled steel strip, the method further comprises:
and if the actual winding diameter of the steel strip on the winding drum is larger than the second winding diameter threshold value, controlling the real-time tension in the winding process to be equal to the ending tension.
8. A real-time tension control device in a crimping process, comprising:
a first determining module for determining a thickness threshold of the curled steel strip according to the composition characteristics of the steel grade;
the second determining module is used for determining the starting tension and the ending tension of the coiling process and the first coiling diameter threshold value and the second coiling diameter threshold value of the steel strip on the coiling drum according to the thickness threshold value and the actual thickness of the coiled steel strip, wherein the starting tension is smaller than the ending tension, and the first coiling diameter threshold value is smaller than the second coiling diameter threshold value;
and the real-time tension control module is used for controlling the real-time tension in the curling process to gradually increase from the start tension when the actual rolling diameter of the steel strip on the winding drum is equal to the first rolling diameter threshold to the end tension when the actual rolling diameter is equal to the second rolling diameter threshold according to the first rolling diameter threshold, the second rolling diameter threshold and the start tension and the end tension.
9. A computing device, comprising: the device comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete communication with each other through the communication bus;
the memory is configured to store at least one executable instruction that causes the processor to perform operations corresponding to the real-time tension control method in a crimping process as claimed in any one of claims 1 to 7.
10. A computer storage medium having stored therein at least one executable instruction for causing a processor to perform operations corresponding to the real-time tension control method in a crimping process as claimed in any one of claims 1 to 7.
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| CN202311288578.7A CN117259451A (en) | 2023-10-08 | 2023-10-08 | Real-time tension control method and device in crimping process |
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| CN202311288578.7A CN117259451A (en) | 2023-10-08 | 2023-10-08 | Real-time tension control method and device in crimping process |
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