CN112756403B - Strip steel deviation rectifying system and method - Google Patents
Strip steel deviation rectifying system and method Download PDFInfo
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- CN112756403B CN112756403B CN202011506390.1A CN202011506390A CN112756403B CN 112756403 B CN112756403 B CN 112756403B CN 202011506390 A CN202011506390 A CN 202011506390A CN 112756403 B CN112756403 B CN 112756403B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/06—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring tension or compression
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention relates to the field of strip steel pressure processing, aims to solve the problem of low timeliness and accuracy of the existing strip steel deviation rectifying control, and provides a strip steel deviation rectifying system and a method, wherein the system comprises: tension detection module, control module and adjustment module, tension detection module includes: the tension detection module is used for detecting the tension on two sides of the strip steel according to the sampling period; the control module is used for generating a corresponding rolling force adjusting signal according to the tension difference and sending the corresponding rolling force adjusting signal to the adjusting module; and the adjusting module is used for receiving the rolling force adjusting signal and adjusting the rolling force of the corresponding side of the rolling mill according to the rolling force adjusting signal. The invention can intervene and adjust automatically before the deviation of the strip steel, and is suitable for strip steel hot continuous rolling, cold continuous rolling and various strip steel leveling units.
Description
Technical Field
The invention relates to the field of strip steel pressure processing, in particular to a strip steel deviation rectifying system and a strip steel deviation rectifying method.
Background
The prevention of strip steel deviation in the rolling process is always an industrial problem, the strip steel deviation can cause quality defects of strip steel such as single-side waves, sickle curves, S curves, wedges, edge scratches, rolled canker, turriforms and the like, the yield of the strip steel is reduced, the strip steel is seriously deviated, even steel clamping, scrap steel, production stop treatment and equipment damage are caused, and the strip steel processing cost is greatly increased. At present, manual observation and adjustment are mostly adopted for deviation control, and the adjustment timeliness and accuracy are not high.
Disclosure of Invention
The invention aims to solve the problem that the existing strip steel deviation rectifying control is low in timeliness and accuracy, and provides a strip steel deviation rectifying system and a method.
The technical scheme adopted by the invention for solving the technical problems is as follows: hot rolled strip steel deviation correcting system includes: tension detection module, control module and adjustment module, tension detection module includes: the device comprises a tension roller, an upper cross beam, a rotating connecting pin, a lower cross beam, a first pressure sensor, a second pressure sensor and a lifting cylinder, wherein bearing blocks on two sides of the tension roller are respectively fixed on two sides of the upper cross beam, the middle position of the upper cross beam is connected with an ear hole in the middle of the lower cross beam through the rotating connecting pin, the first pressure sensor is arranged on one side above the lower cross beam, the second pressure sensor is arranged on the other side above the lower cross beam, and two sides below the lower cross beam are respectively connected with the lifting cylinder;
the tension detection module is used for detecting the tension of two sides of the strip steel according to a sampling period, wherein the first pressure sensor is used for detecting the tension of a first side of the strip steel, and the second pressure sensor is used for detecting the tension of a second side of the strip steel;
the control module is used for determining a tension difference according to the difference value of the tension of the first side of the strip steel and the tension of the second side of the strip steel in each sampling period, generating a corresponding rolling force adjusting signal according to the tension difference and sending the corresponding rolling force adjusting signal to the adjusting module;
and the adjusting module is used for receiving the rolling force adjusting signal and adjusting the rolling force of the corresponding side of the rolling mill according to the rolling force adjusting signal.
Further, the generating a corresponding rolling force adjustment signal according to the tension difference specifically includes:
if the absolute value of the tension difference is smaller than or equal to a first preset value, a rolling force adjusting signal is not generated, otherwise, a corresponding rolling force adjusting signal is generated according to the tension difference, and the first preset value is larger than zero.
Further, the generating a corresponding rolling force adjustment signal according to the tension difference specifically includes:
if the tension difference is larger than zero, an adjusting signal for increasing the rolling force of the first side of the strip steel is generated, and if the tension difference is smaller than zero, an adjusting signal for increasing the rolling force of the second side of the strip steel is generated.
Further, the calculation formula of the rolling force difference adjustment amount corresponding to the adjustment signal for increasing the rolling force of the first side of the strip steel and the rolling force of the second side of the strip steel is as follows:
wherein A is the adjustment amount of the rolling force difference, P is the unit value of the rolling force adjustment, X is the tension difference, and M is a first preset value.
Further, the first preset value is 0.3 kilonewtons.
Further, the sampling period is determined according to the speed of the strip steel, when the speed of the strip steel is less than or equal to a second preset value, the sampling period is a third preset value, and when the speed of the strip steel is greater than the second preset value, a calculation formula of the sampling period is as follows:
wherein f is the sampling period, and V is the speed of the strip steel.
Further, the second preset value is 1 meter per second, and the third preset value is 0.5 second.
On the other hand, the invention also provides a strip steel deviation rectifying method, which is applied to the strip steel deviation rectifying system and comprises the following steps:
step 1, detecting the tension of two sides of the strip steel according to a sampling period, wherein the tension of the two sides of the strip steel comprises the tension of a first side of the strip steel and the tension of a second side of the strip steel;
and 3, adjusting the rolling force of the corresponding side of the rolling mill according to the rolling force adjusting signal.
The invention has the beneficial effects that: according to the strip steel deviation rectifying system and the method, the strip steel real-time state cannot be dynamically met due to poor distribution of rolling force on two sides of a rolling mill, the tension imbalance of the strip steel on the two sides is caused, and the deviation is further caused.
Drawings
FIG. 1 is a schematic structural diagram of a deviation correcting system for strip steel according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for correcting deviation of strip steel according to an embodiment of the present invention;
description of reference numerals:
1-a tension roller; 2-bearing seat; 3-upper beam; 4-a lower cross beam; 5-rotating the connecting pin; 6-a first pressure sensor; 7-a second pressure sensor; 8-lifting cylinder.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The invention aims to solve the problem of low timeliness and accuracy of the existing band steel deviation rectifying control, and provides a band steel deviation rectifying system and a method, wherein the system comprises: tension detection module, control module and adjustment module, tension detection module includes: the device comprises a tension roller, an upper beam, a rotating connecting pin, a lower beam, a first pressure sensor, a second pressure sensor and a lifting cylinder, wherein bearing blocks on two sides of the tension roller are respectively fixed on two sides of the upper beam, the middle position of the upper beam is connected with an ear hole in the middle of the lower beam through the rotating connecting pin, the first pressure sensor is arranged on one side above the lower beam, the second pressure sensor is arranged on the other side above the lower beam, two sides below the lower beam are respectively connected with the lifting cylinder, and the lifting cylinder rises to enable the tension roller to support strip steel and form a certain parabola; the tension detection module is used for detecting the tensions at two sides of the strip steel according to a sampling period, wherein the first pressure sensor is used for detecting the tension at the first side of the strip steel, and the second pressure sensor is used for detecting the tension at the second side of the strip steel; the control module is used for determining a tension difference according to the difference value of the tension of the first side of the strip steel and the tension of the second side of the strip steel in each sampling period, generating a corresponding rolling force adjusting signal according to the tension difference and sending the corresponding rolling force adjusting signal to the adjusting module; and the adjusting module is used for receiving the rolling force adjusting signal and adjusting the rolling force of the corresponding side of the rolling mill according to the rolling force adjusting signal.
When the tension deviation testing device is used specifically, firstly, the tension of the first side of the strip steel is collected according to a sampling period through the first pressure sensor, the tension of the second side of the strip steel is collected according to the sampling period through the second pressure sensor, under the action of the rotating connecting pin, the tension detected by one of the first pressure sensor and the second pressure sensor is 0, the tension detected by the other one of the first pressure sensor and the second pressure sensor is not 0, before the strip steel deviates, the tension difference of the two sides of the strip steel is gradually increased, and finally, the strip steel is pulled and deviated in a single-side mode. Based on the method, the tension difference between the first side and the second side of the strip steel in each sampling period is detected, whether the strip steel is about to deviate is judged according to the tension difference, if the strip steel is about to deviate, the rolling force of the corresponding side of the rolling mill is adjusted according to the tension difference, and then automatic intervention adjustment before the strip steel deviates is realized.
Examples
The strip steel deviation rectifying system of the embodiment of the invention, as shown in figure 1, comprises: tension detection module, control module and adjustment module, tension detection module includes: the tension roller comprises a tension roller 1, an upper cross beam 3, a rotary connecting pin 5, a lower cross beam 4, a first pressure sensor 6, a second pressure sensor 7 and a lifting cylinder 8, wherein bearing blocks 2 on two sides of the tension roller 1 are respectively fixed on two sides of the upper cross beam 3, the middle position of the upper cross beam 3 is connected with an ear hole in the middle of the lower cross beam 4 through the rotary connecting pin 5, the first pressure sensor 6 is arranged on one side above the lower cross beam 4, the second pressure sensor 7 is arranged on the other side above the lower cross beam, and two sides below the lower cross beam 4 are respectively connected with the lifting cylinder 8;
in the embodiment, when the upper cross beam 3 is parallel to the lower cross beam 4, a gap of 0.5-1 mm is formed between the first pressure sensor 6 and the second pressure sensor 7 and the contact plane of the upper cross beam, and under the action of the rotating connecting pin, the tension detected by one of the first pressure sensor and the second pressure sensor is 0, and the tension detected by the other one of the first pressure sensor and the second pressure sensor is not 0.
The tension detection module is used for detecting the tension of two sides of the strip steel according to a sampling period, wherein the first pressure sensor 6 is used for detecting the tension of a first side of the strip steel, and the second pressure sensor 7 is used for detecting the tension of a second side of the strip steel;
wherein, the first side of the strip steel can be a transmission side, and the second side of the strip steel can be an operation side.
Preferably, the sampling period is determined according to the speed of the strip steel, when the speed of the strip steel is less than or equal to a second preset value, the sampling period is a third preset value, and when the speed of the strip steel is greater than the second preset value, a calculation formula of the sampling period is as follows:
wherein f is the sampling period and V is the speed of the strip steel.
The second preset value can be 1 meter per second, and the third preset value can be 0.5 second, so that the tension of the first side and the second side of the strip steel can be sampled once every 0.5 meter of strip steel passes through.
The following table schematically lists sampling periods corresponding to different speeds of the strip steel;
| V(m/s) | 0.5 | 1 | 2 | 3 | 4 | 5 | 6 |
| f＝1/2V(s) | 0.5 | 0.5 | 0.25 | 0.16 | 0.125 | 0.1 | 0.083 |
the control module is used for determining a tension difference according to the difference value of the tension of the first side of the strip steel and the tension of the second side of the strip steel in each sampling period, generating a corresponding rolling force adjusting signal according to the tension difference and sending the corresponding rolling force adjusting signal to the adjusting module;
in this embodiment, the generating the corresponding rolling force adjustment signal according to the tension difference specifically includes:
if the absolute value of the tension difference is smaller than or equal to a first preset value, a rolling force adjusting signal is not generated, otherwise, a corresponding rolling force adjusting signal is generated according to the tension difference, and the first preset value is larger than zero. If the tension difference is larger than zero, an adjusting signal for increasing the rolling force of the first side of the strip steel is generated, and if the tension difference is smaller than zero, an adjusting signal for increasing the rolling force of the second side of the strip steel is generated.
Specifically, if the tension of the first side of the strip detected by the first pressure sensor is D, the tension of the second side of the strip is W, and the unit is Kilonewton (KN), the tension difference is: X-D-W.
When the absolute value X is less than or equal to M, the strip steel does not have the tendency of deviation, and a rolling force adjusting signal is not generated at the moment, namely, the adjustment intervention is not carried out;
when the absolute value of X is more than M, the deviation trend of the strip steel is shown, and a rolling force adjusting signal is generated at the moment, namely, the adjustment intervention is carried out, and the method specifically comprises the following steps: if X is regular, the rolling force on the first side (namely, the side D) of the strip steel is increased, and if X is negative, the rolling force on the second side (namely, the side W) of the strip steel is increased, wherein M is a first preset value, the first preset value can be set according to different conditions of the rolling mill, and the first preset value in the embodiment is preferably 0.3 KN.
Specifically, the calculation formula of the rolling force difference adjustment amount corresponding to the adjustment signal for increasing the rolling force of the first side of the strip steel and the rolling force of the second side of the strip steel is as follows:
wherein A is the adjustment amount of the rolling force difference, P is the unit value of the rolling force adjustment, X is the tension difference, and M is a first preset value.
It can be understood that, in each sampling period, when adjustment intervention is required, the corresponding rolling force difference adjustment amount is calculated according to the unit value of rolling force adjustment of the rolling mill, the tension difference sampled in the current period and the first preset value and based on the formula, a rolling force adjustment signal containing a rolling force increase position and the rolling force difference adjustment amount is generated, and the signal is sent to the adjustment module, wherein the rolling force increase position comprises a first side of the strip steel and a second side of the strip steel.
Assuming that the first preset value is 0.3KN and the unit value of the rolling force adjustment is 15KN, the following table schematically lists the rolling force difference adjustment amounts corresponding to different tension differences:
| X(KN) | ≤0.3 | 0.35 | 0.8 | 1.3 | 2.1 | 2.6 | 3 |
| A＝P|X|/M(KN) | 0 | 17.5 | 40 | 65 | 105 | 130 | 150 |
and the adjusting module is used for receiving the rolling force adjusting signal and adjusting the rolling force of the corresponding side of the rolling mill according to the rolling force adjusting signal.
Specifically, the adjusting module can adjust the corresponding position of the rolling mill and the rolling force thereof, and after receiving the rolling force adjusting signal, the adjusting module adjusts the rolling mill according to the rolling force increasing position and the rolling force difference adjusting amount in the rolling force adjusting signal, so that automatic intervention and adjustment before deviation of the strip steel is realized. For example, if the rolling force increase position in the rolling force adjustment signal is the first side of the strip and the rolling force difference adjustment amount is 40KN, the rolling force of the rolling mill is adjusted so that the first side of the strip is increased by 20KN and the other side of the strip is decreased by 20 KN.
Based on the above technical solution, this embodiment further provides a strip steel deviation rectifying method, which is applied to the strip steel deviation rectifying system, as shown in fig. 2, and includes the following steps:
step S1, detecting the tension of two sides of the strip steel according to the sampling period, wherein the tension of the two sides of the strip steel comprises the tension of a first side of the strip steel and the tension of a second side of the strip steel;
step S2, determining a tension difference according to the difference value of the tension of the first side of the strip steel and the tension of the second side of the strip steel in each sampling period, and generating a corresponding rolling force adjusting signal according to the tension difference;
and step S3, adjusting the rolling force of the corresponding side of the rolling mill according to the rolling force adjusting signal.
It can be understood that, because the strip steel deviation rectifying method according to the embodiment of the present invention is implemented based on the strip steel deviation rectifying system according to the embodiment, for the method disclosed in the embodiment, the description is simpler because it corresponds to the system disclosed in the embodiment, and the relevant points can be referred to the partial description of the system.
Claims (8)
1. Belted steel rectifying system, its characterized in that includes: tension detection module, control module and adjustment module, tension detection module includes: the device comprises a tension roller, an upper cross beam, a rotating connecting pin, a lower cross beam, a first pressure sensor, a second pressure sensor and a lifting cylinder, wherein bearing blocks on two sides of the tension roller are respectively fixed on two sides of the upper cross beam, the middle position of the upper cross beam is connected with an ear hole in the middle of the lower cross beam through the rotating connecting pin, the first pressure sensor is arranged on one side above the lower cross beam, the second pressure sensor is arranged on the other side above the lower cross beam, and two sides below the lower cross beam are respectively connected with the lifting cylinder;
the tension detection module is used for detecting the tension of two sides of the strip steel according to a sampling period, wherein the first pressure sensor is used for detecting the tension of a first side of the strip steel, and the second pressure sensor is used for detecting the tension of a second side of the strip steel;
the control module is used for determining a tension difference according to the difference value between the tension of the first side of the strip steel and the tension of the second side of the strip steel in each sampling period, generating a corresponding rolling force adjusting signal according to the tension difference and sending the corresponding rolling force adjusting signal to the adjusting module;
and the adjusting module is used for receiving the rolling force adjusting signal and adjusting the rolling force of the corresponding side of the rolling mill according to the rolling force adjusting signal.
2. The strip steel deviation rectifying system according to claim 1, wherein the generating of the corresponding rolling force adjusting signal according to the tension difference specifically comprises:
if the absolute value of the tension difference is smaller than or equal to a first preset value, a rolling force adjusting signal is not generated, otherwise, a corresponding rolling force adjusting signal is generated according to the tension difference, and the first preset value is larger than zero.
3. The strip steel deviation rectifying system according to claim 2, wherein the generating of the corresponding rolling force adjusting signal according to the tension difference specifically comprises:
if the tension difference is larger than zero, an adjusting signal for increasing the rolling force of the first side of the strip steel is generated, and if the tension difference is smaller than zero, an adjusting signal for increasing the rolling force of the second side of the strip steel is generated.
4. The strip steel deviation rectifying system according to claim 3, wherein the calculation formula of the rolling force difference adjustment amount corresponding to the adjustment signal for increasing the rolling force of the first side of the strip steel and the rolling force of the second side of the strip steel is as follows:
wherein A is the adjustment amount of the rolling force difference, P is the unit value of the rolling force adjustment, X is the tension difference, and M is a first preset value.
5. The strip steel deviation correcting system according to claim 2 or 4, wherein the first preset value is 0.3 kn.
6. The strip steel deviation rectifying system according to claim 1, wherein the sampling period is determined according to the speed of the strip steel, when the speed of the strip steel is less than or equal to a second preset value, the sampling period is a third preset value, and when the speed of the strip steel is greater than the second preset value, the calculation formula of the sampling period is as follows:
wherein f is the sampling period and V is the speed of the strip steel.
7. The strip steel deviation correcting system of claim 6, wherein the second preset value is 1 meter per second and the third preset value is 0.5 seconds.
8. The strip steel deviation rectifying method applied to the strip steel deviation rectifying system according to any one of claims 1 to 7, comprising the steps of:
step 1, detecting the tension of two sides of the strip steel according to a sampling period, wherein the tension of the two sides of the strip steel comprises the tension of a first side of the strip steel and the tension of a second side of the strip steel;
step 2, determining a tension difference according to a difference value of the tension of the first side of the strip steel and the tension of the second side of the strip steel in each sampling period, and generating a corresponding rolling force adjusting signal according to the tension difference;
and 3, adjusting the rolling force of the corresponding side of the rolling mill according to the rolling force adjusting signal.
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| CN113290064B (en) * | 2021-05-20 | 2023-09-19 | 马鞍山钢铁股份有限公司 | Method for reducing deviation and belt breakage of cold continuous rolling mill |
| CN114147073B (en) * | 2021-11-03 | 2024-02-02 | 天津市新宇彩板有限公司 | Zero calibration control method and system for oil pressure sensor |
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