CN109304372B - Withdrawal and straightening coiling tension obtaining method and device and tension control system - Google Patents
Withdrawal and straightening coiling tension obtaining method and device and tension control system Download PDFInfo
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- CN109304372B CN109304372B CN201811222578.6A CN201811222578A CN109304372B CN 109304372 B CN109304372 B CN 109304372B CN 201811222578 A CN201811222578 A CN 201811222578A CN 109304372 B CN109304372 B CN 109304372B
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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
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/02—Tension
- B21B2265/04—Front or inlet tension
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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
- B21B2265/02—Tension
- B21B2265/08—Back or outlet tension
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Abstract
The invention discloses a withdrawal and straightening coiling tension obtaining method and device and a tension control system, wherein the method comprises the following steps: the method comprises the steps of obtaining initial tension, the total length of a steel strip and coiling length, determining coiling tension according to the initial tension, the total length of the steel strip and the coiling length, when the coiling length is smaller than or equal to preset length, the coiling tension is equal to the initial tension, when the coiling length is larger than the preset length, the coiling tension is reduced along with the increase of the coiling length, and when the coiling length reaches the total length of the steel strip, the coiling tension is preset tension. According to the pulling-straightening coiling tension obtaining method and device and the tension control system, the coiling tension is determined according to the initial tension, the total length of the steel strip and the coiling length, the obtained coiling tension is related to the coiling length, the coiling efficiency can be guaranteed, and the probability of the coil collapse phenomenon in the coiling operation can be reduced.
Description
Technical Field
The invention relates to the technical field of steel strip coiling, in particular to a tension-straightening coiling tension obtaining method and device and a tension control system.
Background
In a strip steel production line, if the tangential stress of a steel coil exceeds the bending allowable stress, the shape of the steel coil is obviously out of round, which is called as a steel strip collapse phenomenon. When an extremely thin strip (for example, a steel strip having a thickness of 0.12mm or less) is wound, the allowable stress for bending of the extremely thin strip is low, and the phenomenon of collapsing is more likely to occur. The tension during pulling, straightening and coiling is controlled, so that the problem of coil collapse can be effectively solved.
Therefore, it is necessary to control the straightening and coiling tension in the strip coiling operation to solve the problem of coil collapse in the ultra-thin strip coiling operation.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a pulling-straightening coiling tension obtaining method and device and a tension control system.
Therefore, the invention discloses a withdrawal and straightening coiling tension obtaining method and device and a tension control system. The method comprises the following steps:
the method comprises the steps of obtaining initial tension, the total length of a steel strip and coiling length, determining coiling tension according to the initial tension, the total length of the steel strip and the coiling length, wherein when the coiling length is smaller than or equal to preset length, the coiling tension is equal to the initial tension, when the coiling length is larger than the preset length, the coiling tension is reduced along with the increase of the coiling length, and when the coiling length is equal to the total length of the steel strip, the coiling tension is preset tension.
Further, in the withdrawal and straightening coiling tension obtaining method, when the coiling length is greater than the preset length, the coiling tension and the coiling length are in a linear relationship.
Further, in the withdrawal and straightening coiling tension obtaining method, the preset length is 200 m.
Further, in the withdrawal and straightening coiling tension obtaining method, the ratio of the preset tension to the initial tension is 0.715.
Further, in the withdrawal and straightening coiling tension obtaining method, the coiling tension is determined according to the initial tension, the coiling length and the total length of the steel strip by using a formula I:
in the formula one: y represents the take-up tension;
b represents the initial tension;
x represents the coiled length;
a represents the total length of the steel strip.
A withdrawal and straightening take-up tension acquiring device, comprising:
the acquiring unit is used for acquiring initial tension, the total length of the steel strip and the coiling length;
and the determining unit is used for determining the coiling tension according to the initial tension, the total length of the steel strip and the coiling length.
A withdrawal and straightening coiling tension control system, comprising: the tension straightening and coiling tension acquiring device comprises an execution module and the tension straightening and coiling tension acquiring device;
the execution module is connected with the pulling and straightening coiling tension acquisition device and is used for outputting output tension equivalent to the coiling tension after the pulling and straightening coiling tension acquisition device determines the coiling tension.
The technical scheme of the invention has the following main advantages:
according to the pulling-straightening coiling tension obtaining method and device and the tension control system, the coiling tension is determined according to the initial tension, the total length of the steel strip and the coiling length, and the obtained coiling tension is related to the coiling length. When the coiling length is less than the preset length, the bending allowable stress of the steel coil is large, and the coiling operation can be carried out by using the initial tension. When the coiling length is greater than the preset length, the bending allowable stress of the steel coil is reduced along with the increase of the coiling length, and the coiling tension is reduced along with the increase of the coiling length, so that the coiling efficiency can be ensured, and the probability of the coil collapse phenomenon in the coiling operation can be reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a graph of take-up tension as a function of take-up length according to one embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
The embodiment of the invention provides a withdrawal and straightening coiling tension obtaining method, which comprises the following steps: the method comprises the steps of obtaining initial tension, the total length of a steel strip and coiling length, determining coiling tension according to the initial tension, the total length of the steel strip and the coiling length, wherein when the coiling length is smaller than or equal to preset length, the coiling tension is equal to the initial tension, when the coiling length is larger than the preset length, the coiling tension is reduced along with the increase of the coiling length, and when the coiling length is equal to the total length of the steel strip, the coiling tension is the preset tension.
According to the pulling-straightening coiling tension obtaining method provided by the embodiment of the invention, the coiling tension is determined according to the initial tension, the total length of the steel strip and the coiling length, and the obtained coiling tension is related to the coiling length. When the coiling length is less than the preset length, the bending allowable stress of the steel coil is large, and the coiling operation can be carried out by using the initial tension. When the coiling length is greater than the preset length, the bending allowable stress of the steel coil is reduced along with the increase of the coiling length, and the coiling tension is reduced along with the increase of the coiling length, so that the coiling efficiency can be ensured, and the probability of the coil collapse phenomenon in the coiling operation can be reduced.
When the coiling length is greater than the preset length and the coiling tension is reduced along with the increase of the coiling length, the coiling length and the coiling tension can be in a circumferential curve function relationship, a quadratic curve function, a linear relationship or the like. In the embodiment of the present invention, it is preferable that the winding tension has a linear relationship with the winding length.
Alternatively, the operator may determine the preset length by the coiling length at the beginning of the coil collapse phenomenon in the coiling operation, and the preset length is less than or equal to the coiling length at the beginning of the coil collapse phenomenon. That is, before the collapse phenomenon starts, the winding tension starts to be gradually reduced, so that the probability of the collapse phenomenon is low. As an example, the predetermined length may be 100-300 m, for example, 100m, 200m, 300 m.
In the embodiment of the invention, the ratio of the preset tension to the initial tension can be 0.5-0.8, for example, 0.5, 0.6 and 0.8, so that the coiling efficiency is high, and the probability of coil collapse is reduced. Preferably, the ratio of the preset tension to the initial tension may be 0.715.
A specific example is given below of how the coiling tension is determined from the initial tension, the coiling length and the total strip length:
determining the coiling tension according to the initial tension, the coiling length and the total length of the steel strip by using a formula I:
the formula I is as follows:
in the formula I, Y represents coiling tension and has the unit of N;
b represents the initial tension in N;
x represents a coiling length in m;
a represents the total length of the steel strip in m.
As shown in fig. 1, given an initial tension B and a total strip length a, the initial tension B and the total strip length a are used as coefficients, and a winding length X is used as an unknown quantity, and a winding tension Y is obtained through a formula one operation. When the winding length is less than or equal to 200, the winding tension is kept unchanged at the initial tension B during the winding operation. When the winding length is more than 200, the winding tension keeps a linear relation with the winding length. When the coiling length reaches the total length of the steel strip (i.e. coiling operation is finished), the coiling tension is equal to 0.715B. This method can be applied to the calculation of the winding tension in the winding operation of an extremely thin steel strip having a thickness of 0.012mm or less.
The embodiment of the invention also provides a pulling-straightening coiling tension obtaining device, which comprises:
the acquiring unit is used for acquiring initial tension, the total length of the steel strip and the coiling length;
and the determining unit is used for determining the coiling tension according to the initial tension, the total length of the steel strip and the coiling length.
The device is used for executing the method to determine the coiling tension, the coiling tension is determined by the initial tension, the total length of the steel strip and the coiling length, and the obtained coiling tension is related to the coiling length. When the coiling length is less than the preset length, the bending allowable stress of the steel coil is large, and the coiling operation can be carried out by using the initial tension. When the coiling length is greater than the preset length, the bending allowable stress of the steel coil is reduced along with the increase of the coiling length, and the coiling tension is reduced along with the increase of the coiling length, so that the coiling efficiency can be ensured, and the probability of the coil collapse phenomenon in the coiling operation can be reduced.
The acquisition unit can acquire the initial tension and the total length of the steel strip through detection, and can also manually input through a worker. The acquisition unit may acquire the coiling length by monitoring the steel strip in real time during the coiling operation.
The embodiment of the invention also provides a tension-straightening coiling tension control system, which comprises: the device comprises an execution module and a pulling-straightening coiling tension obtaining device;
the execution module is connected with the pulling-straightening coiling tension acquisition device and is used for outputting output tension equivalent to the coiling tension after the pulling-straightening coiling tension acquisition device determines the coiling tension.
By the system, the output tension in the coiling operation can be always the coiling tension determined by the method and the device, and the coiling efficiency can be ensured, the probability of coil collapse in the coiling operation can be reduced, and the coiling operation can be stably carried out by controlling the output tension in the coiling operation process.
The execution module can comprise a central control machine and a motor, wherein the central control machine is respectively connected with the pulling-straightening coiling tension acquisition device and the motor, receives the coiling tension determined by the pulling-straightening coiling tension acquisition device, and sends an instruction to control the motor to operate according to the coiling tension so that the motor outputs an output tension equivalent to the coiling tension.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "front", "rear", "left", "right", "upper" and "lower" in this document are referred to the placement states shown in the drawings.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (1)
1. A withdrawal and straightening coiling tension obtaining method, which is characterized by comprising the following steps:
the method comprises the steps of obtaining initial tension, the total length of a steel strip and a coiling length, determining coiling tension according to the initial tension, the total length of the steel strip and the coiling length, wherein when the coiling length is smaller than or equal to a preset length, the coiling tension is equal to the initial tension, when the coiling length is larger than the preset length, the coiling tension is reduced along with the increase of the coiling length, and when the coiling length is larger than the preset length, the coiling tension and the coiling length are in a linear relation;
the preset length is 200 m;
determining the coiling tension according to the initial tension, the coiling length and the total length of the steel strip by using a formula I:
in the formula one: y represents the take-up tension;
b represents the initial tension;
x represents the coiled length;
a represents the total length of the steel strip.
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| CN201811222578.6A CN109304372B (en) | 2018-10-19 | 2018-10-19 | Withdrawal and straightening coiling tension obtaining method and device and tension control system |
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| CN201811222578.6A CN109304372B (en) | 2018-10-19 | 2018-10-19 | Withdrawal and straightening coiling tension obtaining method and device and tension control system |
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| CN109304372B true CN109304372B (en) | 2020-05-08 |
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| CN112974529B (en) * | 2021-02-20 | 2023-12-12 | 山西太钢不锈钢精密带钢有限公司 | Coiling method for preventing surface scratch of ultrathin soft bright-surface low-roughness stainless steel strip |
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| CN104249091A (en) * | 2013-06-28 | 2014-12-31 | 宝山钢铁股份有限公司 | Control method of coiling tension of oriented silicon steel continuous annealing unit |
| CN104438439A (en) * | 2014-11-27 | 2015-03-25 | 武汉钢铁(集团)公司 | Control method for reducing rolling type defects of thin specification automobile boards |
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| CN105955220A (en) * | 2016-06-17 | 2016-09-21 | 首钢总公司 | Method and apparatus for controlling coiling tension of strip steel |
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- 2018-10-19 CN CN201811222578.6A patent/CN109304372B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103832897A (en) * | 2012-11-21 | 2014-06-04 | 上海梅山钢铁股份有限公司 | Anti-buckling coiling machine strip steel threading tension control method |
| CN104249091A (en) * | 2013-06-28 | 2014-12-31 | 宝山钢铁股份有限公司 | Control method of coiling tension of oriented silicon steel continuous annealing unit |
| CN104438439A (en) * | 2014-11-27 | 2015-03-25 | 武汉钢铁(集团)公司 | Control method for reducing rolling type defects of thin specification automobile boards |
| CN104933262A (en) * | 2015-07-03 | 2015-09-23 | 首钢总公司 | Method and system for preventing reel sinking deformation of galvanized steel reels |
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