CN110142314B - Method and device for controlling tension fluctuation of galvanized wire welding line burnishing machine - Google Patents
Method and device for controlling tension fluctuation of galvanized wire welding line burnishing machine Download PDFInfo
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- CN110142314B CN110142314B CN201910484474.0A CN201910484474A CN110142314B CN 110142314 B CN110142314 B CN 110142314B CN 201910484474 A CN201910484474 A CN 201910484474A CN 110142314 B CN110142314 B CN 110142314B
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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
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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
- 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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/56—Elongation 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
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/10—Compression, e.g. longitudinal compression
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/12—Rolling load or rolling pressure; roll force
Abstract
The invention provides a method for controlling tension fluctuation of a galvanized wire welding line burnishing machine, which comprises the following steps: before the first strip steel welding seam reaches the finishing machine, the finishing machine stops elongation control and controls the set rolling force to be reduced to the decompression rolling force; obtaining a first decompression rate, wherein the first decompression rate is the decompression rate of the first strip steel welding seam before reaching the finishing machine; obtaining a second rate of depressurization that is the same as the first rate of depressurization; and after the first strip steel welding seam passes through the finishing machine, controlling the set rolling force to be increased to the set rolling force of the second strip steel according to a second pressure reduction rate. The technical problem of the prior art that the cross grain defect of the strip steel welding seam is caused by the large fluctuation of the tension due to the drastic change of the rolling reduction of the optical finishing machine during the pressure reduction is solved. The technical effects of reducing tension fluctuation of the galvanized wire welding line when the galvanized wire welding line passes through the finishing machine through a control algorithm and a program, further improving the mechanical property of the strip steel, reducing cutting loss and ensuring the yield are achieved.
Description
Technical Field
The invention relates to the technical field of cold-rolled plate strip rolling, in particular to a method and a device for controlling tension fluctuation of a zinc-plating line welding line burnishing machine.
Background
A high-added-value production line for cold rolling galvanization is generally provided with a finishing machine, and is used for flattening the surface of a strip steel, controlling the shape of the strip steel, improving the mechanical property of the strip steel, transferring the roughness and enabling the finished strip steel to be subjected to rust prevention treatment more easily. Because the front and the rear band steels are welded, the thickness of the welding seam is usually higher than that of the substrate, and the mode of reducing pressure and passing the welding seam is adopted when the welding seam passes through a finishing machine. Thus, when the pressure is reduced, the tension fluctuates greatly due to a drastic change in the amount of reduction.
However, in the process of implementing the technical solution in the embodiment of the present application, the applicant of the present invention finds that the above prior art has at least the following technical problems:
in the prior art, the tension of the light finishing machine greatly fluctuates due to the drastic change of the rolling reduction during pressure reduction, so that the twill defect of the welding seam of the strip steel is caused.
Disclosure of Invention
The embodiment of the invention provides a method and a device for controlling tension fluctuation of a galvanized wire welding seam burnishing machine, which solve the technical problem that the tension fluctuates greatly and the twill defect of a strip steel welding seam is caused due to severe change of the rolling reduction during pressure reduction of the burnishing machine in the prior art.
In view of the above problems, the embodiments of the present application are proposed to provide a method and a device for controlling tension fluctuation of a galvanized wire weld finisher.
In a first aspect, the invention provides a method for controlling tension fluctuation of a galvanized wire weld finishing machine, which comprises the following steps: before a first strip steel welding seam reaches a finishing machine, stopping elongation control of the finishing machine, and controlling the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reducing rolling force; obtaining a first decompression rate, wherein the first decompression rate is the decompression rate of the first strip steel welding seam before reaching the finishing machine; obtaining a second decompression rate, wherein the second decompression rate is the decompression rate of the first strip steel welding seam after the first strip steel welding seam passes through a finishing machine, and the second decompression rate is the same as the first decompression rate; and after the first strip steel welding seam passes through the finishing machine, controlling the set rolling force of the first strip steel to be increased from the reduced rolling force to the set rolling force of a second strip steel according to the second reduced pressure rate, wherein the first strip steel and the second strip steel are adjacent strip steel.
Further, before the first strip steel welding seam reaches the finisher, the finisher stops elongation control and controls the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reduction rolling force, and the method comprises the following steps: according to the first decompression rate and the decompression rolling force, obtaining a first time required for the set rolling force of the first strip steel to be reduced to the decompression rolling force; obtaining a predetermined safe time threshold; obtaining a second time, wherein the second time is the sum of the first time and the preset safe time threshold; and starting pressure reduction at the second time, and reducing the set rolling force of the first strip steel to the pressure reduction rolling force.
Further, the method further comprises: at the second time, controlling the elongation rate speed compensation value to be reduced from the first strip steel set value to a decompression set value according to the preset elongation rate speed compensation value acceleration; obtaining a third time, wherein the third time is a preset safety time after the first strip steel welding line passes through the finishing machine; and controlling the elongation compensation value to recover from the decompression set value to the second strip steel set value according to the preset elongation speed compensation value acceleration at the third time.
Further, the elongation rate compensation value in the non-decompression state is: elongation rate speed compensation valueNon-reduced pressure stateThe elongation is set at the given main speed of the rolling line.
Further, the elongation rate compensation value in the decompression state is as follows: elongation rate speed compensation valueReduced pressure stateElongation rate speed compensation valueNon-reduced pressure stateDecompression rolling force/locking rolling force.
Further, the predetermined elongation rate speed compensation value acceleration is: predetermined elongation rate speed compensation value acceleration (elongation rate speed compensation value)Non-reduced pressure stateElongation rate speed compensation valueReduced pressure state) First time.
In a second aspect, the invention provides a device for controlling tension fluctuation of a galvanized wire weld finishing machine, which comprises:
the first processing unit is used for stopping elongation control of the finishing machine before a first strip steel welding seam reaches the finishing machine, and controlling the set rolling force of the first strip steel to be reduced from the locking rolling force to the decompression rolling force;
a first obtaining unit that obtains a first decompression rate that is a decompression rate before a first strip weld reaches a finishing machine;
a second obtaining unit, configured to obtain a second pressure reduction rate, where the second pressure reduction rate is a pressure reduction rate of the first strip steel weld after passing through the finishing machine, and the second pressure reduction rate is the same as the first pressure reduction rate;
and the second processing unit controls the set rolling force of the first strip steel to be increased from the reduced pressure rolling force to the set rolling force of the second strip steel according to the second reduced pressure rate after the first strip steel welding line passes through the finishing machine, wherein the first strip steel and the second strip steel are adjacent strip steel.
Preferably, before the first strip steel welding seam reaches the finisher, the finisher stops elongation control and controls the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reduction rolling force, and the method includes:
a third obtaining unit that obtains a first time required for the set rolling force of the first strip steel to be reduced to the reduced rolling force, based on the first reduced pressure rate and the reduced pressure rolling force;
a fourth obtaining unit that obtains a predetermined safe time threshold;
a fifth obtaining unit that obtains a second time, which is a sum of the first time and the predetermined safe time threshold;
and a third processing unit which starts pressure reduction at the second time and reduces the set rolling force of the first strip steel to a pressure reduction rolling force.
Preferably, the method further comprises:
a fourth processing unit, which controls the elongation rate speed compensation value to be reduced from the first strip steel set value to the decompression set value according to the preset elongation rate speed compensation value acceleration at the second time;
a sixth obtaining unit, configured to obtain a third time, where the third time is a predetermined safe time after the first strip weld passes through the finishing machine;
and the fifth processing unit controls the elongation compensation value to be recovered from the decompression set value to the second strip steel set value according to the acceleration of the preset elongation speed compensation value at the third time.
Preferably, the elongation rate compensation value in the non-decompression state is:
elongation rate speed compensation valueNon-reduced pressure stateThe elongation is set at the given main speed of the rolling line.
Preferably, the elongation rate compensation value in the depressurized state is:
elongation rate speed compensation valueReduced pressure stateElongation rate speed compensation valueNon-reduced pressure stateDecompression rolling force/locking rolling force.
Preferably, the predetermined elongation rate speed compensation value acceleration is:
predetermined elongation rate speed compensation value acceleration (elongation rate speed compensation value)Non-reduced pressure stateElongation rate speed compensation valueReduced pressure state) First time.
In a third aspect, the invention provides a device for controlling tension fluctuation of a galvanized wire weld finishing machine, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the following steps: before a first strip steel welding seam reaches a finishing machine, stopping elongation control of the finishing machine, and controlling the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reducing rolling force; obtaining a first decompression rate, wherein the first decompression rate is the decompression rate of the first strip steel welding seam before reaching the finishing machine; obtaining a second decompression rate, wherein the second decompression rate is the decompression rate of the first strip steel welding seam after the first strip steel welding seam passes through a finishing machine, and the second decompression rate is the same as the first decompression rate; and after the first strip steel welding seam passes through the finishing machine, controlling the set rolling force of the first strip steel to be increased from the reduced rolling force to the set rolling force of a second strip steel according to the second reduced pressure rate, wherein the first strip steel and the second strip steel are adjacent strip steel.
In a fourth aspect, the present invention provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of: before a first strip steel welding seam reaches a finishing machine, stopping elongation control of the finishing machine, and controlling the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reducing rolling force; obtaining a first decompression rate, wherein the first decompression rate is the decompression rate of the first strip steel welding seam before reaching the finishing machine; obtaining a second decompression rate, wherein the second decompression rate is the decompression rate of the first strip steel welding seam after the first strip steel welding seam passes through a finishing machine, and the second decompression rate is the same as the first decompression rate; and after the first strip steel welding seam passes through the finishing machine, controlling the set rolling force of the first strip steel to be increased from the reduced rolling force to the set rolling force of a second strip steel according to the second reduced pressure rate, wherein the first strip steel and the second strip steel are adjacent strip steel.
One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:
according to the control device for tension fluctuation of the galvanized wire welding line passing finisher, before a first strip steel welding line reaches the finisher, the finisher stops elongation control and controls the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reducing rolling force; obtaining a first decompression rate, wherein the first decompression rate is the decompression rate of the first strip steel welding seam before reaching the finishing machine; obtaining a second decompression rate, wherein the second decompression rate is the decompression rate of the first strip steel welding seam after the first strip steel welding seam passes through a finishing machine, and the second decompression rate is the same as the first decompression rate; and after the first strip steel welding seam passes through the finishing machine, controlling the set rolling force of the first strip steel to be increased from the reduced rolling force to the set rolling force of a second strip steel according to the second reduced pressure rate, wherein the first strip steel and the second strip steel are adjacent strip steel. The technical problem of the prior art that the cross grain defect of the strip steel welding seam is caused by the large fluctuation of the tension due to the drastic change of the rolling reduction of the optical finishing machine during the pressure reduction is solved. The technical effects of reducing tension fluctuation of the galvanized wire welding line when the galvanized wire welding line passes through the finishing machine through a control algorithm and a program, further improving the mechanical property of the strip steel, reducing cutting loss and ensuring the yield are achieved.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
FIG. 1 is a schematic flow chart of a method for controlling tension fluctuation of a galvanized wire weld finishing machine according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a control device for controlling tension fluctuation of a galvanized wire weld finishing machine in an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a control device for controlling tension fluctuation of a galvanized wire weld finishing machine in an embodiment of the invention;
FIG. 4 is a schematic diagram of a control method for tension fluctuation of a galvanized wire weld finishing machine according to an embodiment of the present invention;
FIG. 5 is a control schematic diagram of a control method for controlling tension fluctuation of a galvanized wire weld finishing machine in an embodiment of the invention.
Description of reference numerals: a first processing unit 11, a first obtaining unit 12, a second obtaining unit 13, a second processing unit 14, a receiver 301, a processor 302, a transmitter 303, a memory 304, a bus interface 306.
Detailed Description
The embodiment of the invention provides a method and a device for controlling tension fluctuation of a galvanized wire welding seam burnishing machine, which are used for solving the technical problem that the tension fluctuates greatly and the twill defect of a strip steel welding seam is caused due to the severe change of the rolling reduction during pressure reduction of the burnishing machine in the prior art.
The technical scheme provided by the invention has the following general idea:
before a first strip steel welding seam reaches a finishing machine, stopping elongation control of the finishing machine, and controlling the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reducing rolling force; obtaining a first decompression rate, wherein the first decompression rate is the decompression rate of the first strip steel welding seam before reaching the finishing machine; obtaining a second decompression rate, wherein the second decompression rate is the decompression rate of the first strip steel welding seam after the first strip steel welding seam passes through a finishing machine, and the second decompression rate is the same as the first decompression rate; and after the first strip steel welding seam passes through the finishing machine, controlling the set rolling force of the first strip steel to be increased from the reduced rolling force to the set rolling force of a second strip steel according to the second reduced pressure rate, wherein the first strip steel and the second strip steel are adjacent strip steel. The technical effects of reducing tension fluctuation of the galvanized wire welding line when the galvanized wire welding line passes through the finishing machine through a control algorithm and a program, further improving the mechanical property of the strip steel, reducing cutting loss and ensuring the yield are achieved.
The technical solutions of the present invention are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present invention are described in detail in the technical solutions of the present application, and are not limited to the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Example one
FIG. 1 is a schematic flow chart of a method for controlling tension fluctuation of a galvanized wire weld finishing machine in an embodiment of the invention. As shown in fig. 1, an embodiment of the present invention provides a method for controlling tension fluctuation of a galvanized wire weld finishing machine, where the method includes:
step 110: before a first strip steel welding seam reaches a finishing machine, stopping elongation control of the finishing machine, and controlling the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reducing rolling force;
specifically, before the first strip weld reaches the finisher, the elongation control is stopped while the rolling force is locked, and before the weld reaches the finisher, the pressure reduction is started to reduce the set rolling force to the reduced-pressure rolling force.
Step 120: obtaining a first decompression rate, wherein the first decompression rate is the decompression rate of the first strip steel welding seam before reaching the finishing machine;
specifically, before the first strip steel welding seam reaches the finishing machine, pressure reduction is started, the set rolling force is reduced to the pressure reduction rolling force, and the pressure reduction rate, namely the first pressure reduction rate, before the first strip steel welding seam reaches the finishing machine is measured through a hydraulic pressure reduction system of the finishing machine.
Step 130: obtaining a second decompression rate, wherein the second decompression rate is the decompression rate of the first strip steel welding seam after the first strip steel welding seam passes through a finishing machine, and the second decompression rate is the same as the first decompression rate;
specifically, after the first strip steel welding seam passes through the finishing machine, a second decompression rate is obtained, and the second decompression rate is the same as the first decompression rate.
Step 140: and after the first strip steel welding seam passes through the finishing machine, controlling the set rolling force of the first strip steel to be increased from the reduced rolling force to the set rolling force of a second strip steel according to the second reduced pressure rate, wherein the first strip steel and the second strip steel are adjacent strip steel.
Specifically, after the weld passes through the finisher, the set rolling force of the first strip steel is increased from the reducing rolling force to the set rolling force of the second strip steel according to the same reducing rate, that is, according to the second reducing rate. When the set rolling force changes, the set speed of the finishing machine synchronously changes to compensate the second flow change caused by the change of the rolling force.
Further, before the first strip steel welding seam reaches the finisher, the finisher stops elongation control and controls the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reduction rolling force, and the method comprises the following steps: according to the first decompression rate and the decompression rolling force, obtaining a first time required for the set rolling force of the first strip steel to be reduced to the decompression rolling force; obtaining a predetermined safe time threshold; obtaining a second time, wherein the second time is the sum of the first time and the preset safe time threshold; and starting pressure reduction at the second time, and reducing the set rolling force of the first strip steel to the pressure reduction rolling force.
Specifically, t before the weld reaches the finisher0S locking the rolling force, calculating the first time required for reducing the set rolling force of the first strip steel to the reduced rolling force, and simultaneously stopping elongation percentage control. And obtaining a time value t predetermined by the system2I.e. a predetermined safety time threshold value, the predetermined safety time threshold value is generally 0.5-1S, and the time t required by reducing the pressure to the reducing rolling force is calculated according to the reducing rolling force and the reducing speed1The sum of the first time and the preset safety time threshold value, namely the second time, and the second time t before the welding seam reaches the finishing machine1+t2And starting pressure reduction within the time, and reducing the set rolling force to the pressure reduction rolling force.
Further, the method further comprises: at the second time, controlling the elongation rate speed compensation value to be reduced from the first strip steel set value to a decompression set value according to the preset elongation rate speed compensation value acceleration; obtaining a third time, wherein the third time is a preset safety time after the first strip steel welding line passes through the finishing machine; and controlling the elongation compensation value to recover from the decompression set value to the second strip steel set value according to the preset elongation speed compensation value acceleration at the third time.
Specifically, to ensure the tension stability, it is necessary to perform pre-control compensation on the speed of the rolling mill according to the elongation setting, and when the set rolling force is reduced from the locking rolling force to the reducing rolling force, that is, the first time and the predetermined safety timeAnd the elongation rate speed compensation value is controlled to be reduced from the first strip steel set value to the decompression set value according to the preset elongation rate speed compensation value acceleration within the time of t1+ t 2. At a third time, i.e. a predetermined safety time t after the first strip weld passes through the finishing machine3That is, when the set rolling force is restored, the elongation rate speed compensation value is restored from the reduced pressure setting to the new setting.
Further, the elongation rate compensation value in the non-decompression state is: elongation rate speed compensation valueNon-reduced pressure stateThe elongation is set at the given main speed of the rolling line.
Specifically, the elongation rate speed compensation value calculation method comprises the following steps: in the non-depressurized state, the elongation-rate compensation value is given by multiplying the elongation setting by the main speed of the rolling line.
Further, the elongation rate compensation value in the decompression state is as follows: elongation rate speed compensation valueReduced pressure stateElongation rate speed compensation valueNon-reduced pressure stateDecompression rolling force/locking rolling force.
Specifically, the elongation rate speed compensation value calculation method comprises the following steps: in the decompression state, multiplying the elongation rate speed compensation value by the decompression rolling force according to the original elongation rate speed compensation value, and then dividing by the locking rolling force (t before the welding seam reaches the finisher)0S locks the rolling force).
Further, the predetermined elongation rate speed compensation value acceleration is: predetermined elongation rate speed compensation value acceleration (elongation rate speed compensation value)Non-reduced pressure stateElongation rate speed compensation valueReduced pressure state) First time.
Specifically, an elongation rate speed compensation value acceleration calculation method. Dividing the difference between the original elongation rate compensation value and the elongation rate compensation value in the decompressed state by t1。
Example two
Based on the same inventive concept as the method for controlling the tension fluctuation of the galvanized wire welding line burnishing machine in the previous embodiment, the invention also provides a device for controlling the tension fluctuation of the galvanized wire welding line burnishing machine, as shown in fig. 2, the device comprises:
the first processing unit 11 is used for stopping elongation control of the finishing machine before the first strip steel welding seam reaches the finishing machine, and the first processing unit 11 is used for controlling the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reducing rolling force;
a first obtaining unit 12, wherein the first obtaining unit 12 obtains a first decompression rate, and the first decompression rate is the decompression rate of the first strip steel welding seam before reaching the finishing machine;
a second obtaining unit 13, wherein the second obtaining unit 13 obtains a second decompression rate, the second decompression rate is the decompression rate of the first strip steel welding seam after passing through the finishing machine, and the second decompression rate is the same as the first decompression rate;
and the second processing unit 14 is used for controlling the set rolling force of the first strip steel to be increased from the reduced rolling force to the set rolling force of the second strip steel according to the second reduced pressure rate after the first strip steel welding seam passes through the finishing machine, wherein the first strip steel and the second strip steel are adjacent strip steel.
Preferably, before the first strip steel welding seam reaches the finisher, the finisher stops elongation control and controls the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reduction rolling force, and the method includes:
a third obtaining unit that obtains a first time required for the set rolling force of the first strip steel to be reduced to the reduced rolling force, based on the first reduced pressure rate and the reduced pressure rolling force;
a fourth obtaining unit that obtains a predetermined safe time threshold;
a fifth obtaining unit that obtains a second time, which is a sum of the first time and the predetermined safe time threshold;
and a third processing unit which starts pressure reduction at the second time and reduces the set rolling force of the first strip steel to a pressure reduction rolling force.
Preferably, the method further comprises:
a fourth processing unit, which controls the elongation rate speed compensation value to be reduced from the first strip steel set value to the decompression set value according to the preset elongation rate speed compensation value acceleration at the second time;
a sixth obtaining unit, configured to obtain a third time, where the third time is a predetermined safe time after the first strip weld passes through the finishing machine;
and the fifth processing unit controls the elongation compensation value to be recovered from the decompression set value to the second strip steel set value according to the acceleration of the preset elongation speed compensation value at the third time.
Preferably, the elongation rate compensation value in the non-decompression state is:
elongation rate speed compensation valueNon-reduced pressure stateThe elongation is set at the given main speed of the rolling line.
Preferably, the elongation rate compensation value in the depressurized state is:
elongation rate speed compensation valueReduced pressure stateElongation rate speed compensation valueNon-reduced pressure stateDecompression rolling force/locking rolling force.
Preferably, the predetermined elongation rate speed compensation value acceleration is:
predetermined elongation rate speed compensation value acceleration (elongation rate speed compensation value)Non-reduced pressure stateElongation rate speed compensation valueReduced pressure state) First time.
Various changes and specific examples of the method for controlling the tension fluctuation of the galvanized wire weld finishing machine in the first embodiment of fig. 1 are also applicable to the device for controlling the tension fluctuation of the galvanized wire weld finishing machine in the present embodiment, and through the detailed description of the method for controlling the tension fluctuation of the galvanized wire weld finishing machine in the foregoing embodiments, those skilled in the art can clearly know the method for implementing the device for controlling the tension fluctuation of the galvanized wire weld finishing machine in the present embodiment, so for the brevity of the description, detailed description is not given here.
EXAMPLE III
Based on the same inventive concept as the method for controlling the tension fluctuation of the galvanized wire welding line finisher in the previous embodiment, the invention also provides a device for controlling the tension fluctuation of the galvanized wire welding line finisher, wherein a computer program is stored on the device, and the program is executed by a processor to realize the steps of any one of the methods for controlling the tension fluctuation of the galvanized wire welding line finisher.
Where in fig. 3 a bus architecture (represented by bus 300), bus 300 may include any number of interconnected buses and bridges, bus 300 linking together various circuits including one or more processors, represented by processor 302, and memory, represented by memory 304. The bus 300 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 306 provides an interface between the bus 300 and the receiver 301 and transmitter 303. The receiver 301 and the transmitter 303 may be the same element, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium.
The processor 302 is responsible for managing the bus 300 and general processing, and the memory 304 may be used for storing data used by the processor 302 in performing operations.
Example four
Based on the same inventive concept as the information processing method in the foregoing embodiment, the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, realizes the steps of:
before a first strip steel welding seam reaches a finishing machine, stopping elongation control of the finishing machine, and controlling the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reducing rolling force; obtaining a first decompression rate, wherein the first decompression rate is the decompression rate of the first strip steel welding seam before reaching the finishing machine; obtaining a second decompression rate, wherein the second decompression rate is the decompression rate of the first strip steel welding seam after the first strip steel welding seam passes through a finishing machine, and the second decompression rate is the same as the first decompression rate; and after the first strip steel welding seam passes through the finishing machine, controlling the set rolling force of the first strip steel to be increased from the reduced rolling force to the set rolling force of a second strip steel according to the second reduced pressure rate, wherein the first strip steel and the second strip steel are adjacent strip steel.
One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:
according to the control device for tension fluctuation of the galvanized wire welding line passing finisher, before a first strip steel welding line reaches the finisher, the finisher stops elongation control and controls the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reducing rolling force; obtaining a first decompression rate, wherein the first decompression rate is the decompression rate of the first strip steel welding seam before reaching the finishing machine; obtaining a second decompression rate, wherein the second decompression rate is the decompression rate of the first strip steel welding seam after the first strip steel welding seam passes through a finishing machine, and the second decompression rate is the same as the first decompression rate; and after the first strip steel welding seam passes through the finishing machine, controlling the set rolling force of the first strip steel to be increased from the reduced rolling force to the set rolling force of a second strip steel according to the second reduced pressure rate, wherein the first strip steel and the second strip steel are adjacent strip steel. The technical problem of the prior art that the cross grain defect of the strip steel welding seam is caused by the large fluctuation of the tension due to the drastic change of the rolling reduction of the optical finishing machine during the pressure reduction is solved. The technical effects of reducing tension fluctuation of the galvanized wire welding line when the galvanized wire welding line passes through the finishing machine through a control algorithm and a program, further improving the mechanical property of the strip steel, reducing cutting loss and ensuring the yield are achieved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. A control method for tension fluctuation of a galvanized wire weld finishing machine is characterized by comprising the following steps:
before a first strip steel welding seam reaches a finishing machine, stopping elongation control of the finishing machine, and controlling the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reducing rolling force;
obtaining a first decompression rate, wherein the first decompression rate is the decompression rate of the first strip steel welding seam before reaching the finishing machine;
obtaining a second decompression rate, wherein the second decompression rate is the decompression rate of the first strip steel welding seam after the first strip steel welding seam passes through a finishing machine, and the second decompression rate is the same as the first decompression rate;
after the first strip steel welding seam passes through the finishing machine, controlling the set rolling force of the first strip steel to be increased from the pressure reduction rolling force to the set rolling force of a second strip steel according to the second pressure reduction rate, wherein the first strip steel and the second strip steel are adjacent strip steel;
when the set rolling force changes, the set speed of the finishing machine synchronously changes to compensate the second flow change caused by the change of the rolling force;
performing pre-control compensation on the speed of the rolling mill according to the elongation setting;
according to the first decompression rate and the decompression rolling force, obtaining a first time required for the set rolling force of the first strip steel to be reduced to the decompression rolling force;
obtaining a predetermined safe time threshold;
obtaining a second time, wherein the second time is the sum of the first time and the preset safe time threshold;
starting pressure reduction at the second time, and reducing the set rolling force of the first strip steel to a pressure reduction rolling force;
at the second time, controlling the elongation rate speed compensation value to be reduced from the first strip steel set value to a decompression set value according to the preset elongation rate speed compensation value acceleration;
obtaining a third time, wherein the third time is a preset safety time after the first strip steel welding line passes through the finishing machine;
controlling the elongation rate speed compensation value to recover from the decompression set value to the second strip steel set value according to the preset elongation rate speed compensation value acceleration at the third time;
wherein the elongation rate compensation value in a non-decompression state is:
elongation rate speed compensation valueNon-reduced pressure stateSetting a rolling line given main speed as elongation;
wherein the elongation rate compensation value in a decompression state is as follows:
elongation rate speed compensation valueReduced pressure stateElongation rate speed compensation valueNon-reduced pressure stateDecompression rolling force/lock rolling force;
wherein the predetermined elongation rate speed compensation value acceleration is:
predetermined elongation rate speed compensation value acceleration (elongation rate speed compensation value)Non-reduced pressure stateElongation rate speed compensation valueReduced pressure state) First time.
2. A control device for tension fluctuation of a galvanized wire welding line burnishing machine is characterized by comprising:
the first processing unit is used for stopping elongation control of the finishing machine before a first strip steel welding seam reaches the finishing machine, and controlling the set rolling force of the first strip steel to be reduced from the locking rolling force to the decompression rolling force;
a first obtaining unit that obtains a first decompression rate that is a decompression rate before a first strip weld reaches a finishing machine;
a second obtaining unit, configured to obtain a second pressure reduction rate, where the second pressure reduction rate is a pressure reduction rate of the first strip steel weld after passing through the finishing machine, and the second pressure reduction rate is the same as the first pressure reduction rate;
the second processing unit controls the set rolling force of the first strip steel to be increased from the pressure reduction rolling force to the set rolling force of the second strip steel according to the second pressure reduction rate after the first strip steel welding line passes through the finishing machine, wherein the first strip steel and the second strip steel are adjacent strip steel;
a third obtaining unit that obtains a first time required for the set rolling force of the first strip steel to be reduced to the reduced rolling force, based on the first reduced pressure rate and the reduced pressure rolling force;
a fourth obtaining unit that obtains a predetermined safe time threshold;
a fifth obtaining unit that obtains a second time, which is a sum of the first time and the predetermined safe time threshold;
a third processing unit which starts pressure reduction at the second time and reduces the set rolling force of the first strip steel to a pressure reduction rolling force;
a fourth processing unit, which controls the elongation rate speed compensation value to be reduced from the first strip steel set value to the decompression set value according to the preset elongation rate speed compensation value acceleration at the second time;
a sixth obtaining unit, configured to obtain a third time, where the third time is a predetermined safe time after the first strip weld passes through the finishing machine;
a fifth processing unit, which controls the elongation rate speed compensation value to recover from the decompression set value to the second strip steel set value according to the acceleration of the predetermined elongation rate speed compensation value at the third time;
performing pre-control compensation on the speed of the rolling mill according to the elongation setting;
wherein the elongation rate compensation value in a non-decompression state is:
the elongation rate speed compensation value is in a non-decompression state, namely the elongation rate is set to a rolling line given main speed;
wherein the elongation rate compensation value in a decompression state is as follows:
the elongation rate compensation value decompression state is the elongation rate compensation value non-decompression state and the decompression rolling force/the locking rolling force;
wherein the predetermined elongation rate speed compensation value acceleration is:
predetermined elongation rate compensation value acceleration (elongation rate compensation value non-decompression state-elongation rate compensation value decompression state)/first time.
3. A control device for tension fluctuation of a galvanized wire weld finishing machine comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor, and is characterized in that the processor executes the program to realize the following steps:
before a first strip steel welding seam reaches a finishing machine, stopping elongation control of the finishing machine, and controlling the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reducing rolling force;
obtaining a first decompression rate, wherein the first decompression rate is the decompression rate of the first strip steel welding seam before reaching the finishing machine;
obtaining a second decompression rate, wherein the second decompression rate is the decompression rate of the first strip steel welding seam after the first strip steel welding seam passes through a finishing machine, and the second decompression rate is the same as the first decompression rate;
after the first strip steel welding seam passes through the finishing machine, controlling the set rolling force of the first strip steel to be increased from the pressure reduction rolling force to the set rolling force of a second strip steel according to the second pressure reduction rate, wherein the first strip steel and the second strip steel are adjacent strip steel;
when the set rolling force changes, the set speed of the finishing machine synchronously changes to compensate the second flow change caused by the change of the rolling force;
performing pre-control compensation on the speed of the rolling mill according to the elongation setting;
according to the first decompression rate and the decompression rolling force, obtaining a first time required for the set rolling force of the first strip steel to be reduced to the decompression rolling force;
obtaining a predetermined safe time threshold;
obtaining a second time, wherein the second time is the sum of the first time and the preset safe time threshold;
starting pressure reduction at the second time, and reducing the set rolling force of the first strip steel to a pressure reduction rolling force;
at the second time, controlling the elongation rate speed compensation value to be reduced from the first strip steel set value to a decompression set value according to the preset elongation rate speed compensation value acceleration;
obtaining a third time, wherein the third time is a preset safety time after the first strip steel welding line passes through the finishing machine;
controlling the elongation rate speed compensation value to recover from the decompression set value to the second strip steel set value according to the preset elongation rate speed compensation value acceleration at the third time;
wherein the elongation rate compensation value in a non-decompression state is:
the elongation rate speed compensation value is in a non-decompression state, namely the elongation rate is set to a rolling line given main speed;
wherein the elongation rate compensation value in a decompression state is as follows:
the elongation rate compensation value decompression state is the elongation rate compensation value non-decompression state and the decompression rolling force/the locking rolling force;
wherein the predetermined elongation rate speed compensation value acceleration is:
predetermined elongation rate compensation value acceleration (elongation rate compensation value non-decompression state-elongation rate compensation value decompression state)/first time.
4. A computer-readable storage medium, on which a computer program is stored, which program, when executed by a processor, carries out the steps of:
before a first strip steel welding seam reaches a finishing machine, stopping elongation control of the finishing machine, and controlling the set rolling force of the first strip steel to be reduced from the locking rolling force to the pressure reducing rolling force;
obtaining a first decompression rate, wherein the first decompression rate is the decompression rate of the first strip steel welding seam before reaching the finishing machine;
obtaining a second decompression rate, wherein the second decompression rate is the decompression rate of the first strip steel welding seam after the first strip steel welding seam passes through a finishing machine, and the second decompression rate is the same as the first decompression rate;
after the first strip steel welding seam passes through the finishing machine, controlling the set rolling force of the first strip steel to be increased from the pressure reduction rolling force to the set rolling force of a second strip steel according to the second pressure reduction rate, wherein the first strip steel and the second strip steel are adjacent strip steel;
when the set rolling force changes, the set speed of the finishing machine synchronously changes to compensate the second flow change caused by the change of the rolling force;
performing pre-control compensation on the speed of the rolling mill according to the elongation setting;
according to the first decompression rate and the decompression rolling force, obtaining a first time required for the set rolling force of the first strip steel to be reduced to the decompression rolling force;
obtaining a predetermined safe time threshold;
obtaining a second time, wherein the second time is the sum of the first time and the preset safe time threshold;
starting pressure reduction at the second time, and reducing the set rolling force of the first strip steel to a pressure reduction rolling force;
at the second time, controlling the elongation rate speed compensation value to be reduced from the first strip steel set value to a decompression set value according to the preset elongation rate speed compensation value acceleration;
obtaining a third time, wherein the third time is a preset safety time after the first strip steel welding line passes through the finishing machine;
controlling the elongation rate speed compensation value to recover from the decompression set value to the second strip steel set value according to the preset elongation rate speed compensation value acceleration at the third time;
wherein the elongation rate compensation value in a non-decompression state is:
the elongation rate speed compensation value is in a non-decompression state, namely the elongation rate is set to a rolling line given main speed;
wherein the elongation rate compensation value in a decompression state is as follows:
the elongation rate compensation value decompression state is the elongation rate compensation value non-decompression state and the decompression rolling force/the locking rolling force;
wherein the predetermined elongation rate speed compensation value acceleration is:
predetermined elongation rate compensation value acceleration (elongation rate compensation value non-decompression state-elongation rate compensation value decompression state)/first time.
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| CN111774422B (en) * | 2020-07-16 | 2022-05-03 | 北京首钢冷轧薄板有限公司 | Method for reducing stop loss of continuous rolling mill |
| CN112453053B (en) * | 2020-09-28 | 2023-07-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Strip steel lifting eliminating method for finishing machine in production of thin-specification and extremely-thin-specification strip steel |
| CN113031519B (en) * | 2021-03-02 | 2023-02-17 | 首钢京唐钢铁联合有限责任公司 | Control method and control system for reducing unfinished head of finished strip steel |
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| DE10159608C5 (en) * | 2001-12-05 | 2012-06-14 | Siemens Ag | Rolling process and rolling train for a band with a weld |
| CN101658869B (en) * | 2008-08-25 | 2011-07-27 | 鞍钢股份有限公司 | Technique for continuously and flatly rolling welding seams of cold-rolled sheets |
| CN101905246B (en) * | 2010-08-13 | 2013-03-20 | 攀钢集团钢铁钒钛股份有限公司 | Automatic control method for dynamic variable specification welding seam of rolling mill |
| CN102485364B (en) * | 2010-12-01 | 2015-06-17 | 上海宝信软件股份有限公司 | Tension stabilizing control method and device for leveling machine |
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| CN104107837B (en) * | 2013-04-19 | 2016-02-24 | 宝山钢铁股份有限公司 | The method of accurate control cincture steel percentage elongation when weld seam crosses planisher |
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