CN108405653B - Control method and device for strip steel coiling tension - Google Patents
Control method and device for strip steel coiling tension Download PDFInfo
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- CN108405653B CN108405653B CN201810161857.XA CN201810161857A CN108405653B CN 108405653 B CN108405653 B CN 108405653B CN 201810161857 A CN201810161857 A CN 201810161857A CN 108405653 B CN108405653 B CN 108405653B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 200
- 239000010959 steel Substances 0.000 title claims abstract description 200
- 238000000034 method Methods 0.000 title claims abstract description 56
- 230000001934 delay Effects 0.000 claims abstract description 19
- 230000007547 defect Effects 0.000 abstract description 4
- 238000005096 rolling process Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 3
- 239000002436 steel type Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/02—Winding-up or coiling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
- B21C47/345—Feeding or guiding devices not specially adapted to a particular type of apparatus for monitoring the tension or advance of the material
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Abstract
The invention relates to the field of steel rolling, in particular to a control method of strip steel coiling tension, which comprises the following steps: when the head of the strip steel enters the belt wrapper, controlling the coiling tension value to be 35-65 MPa; when the belt wrapper descends and delays for 4-5 seconds, controlling the step of the coiling tension value to 50.05-92.95MPa, and then gradually reducing the coiling tension value to 38.5-71.5 MPa; when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the coiling tension value to be gradually reduced to 35-65 MPa; when the length of the coiled strip steel reaches 3/5 of the total length of the strip steel, controlling the coiling tension value to be kept at 35-65 MPa; when the length of the coiled steel strip reaches 4/5 of the total length of the steel strip, the coiling tension value is controlled to be gradually increased to 36.75-68.25MPa until the coiling of the steel strip is finished. The method and the device for controlling the coiling tension divide the coiling process into different stages, and can reduce or even avoid the generation of the uncoiling defect of the strip steel in the coiling process by setting the tension of each stage in the coiling process.
Description
Technical Field
The invention relates to the field of steel rolling, in particular to a method and a device for controlling the coiling tension of strip steel.
Background
In the production process of the strip steel, the continuous strip steel finally enters the tail end of a production line for coiling in order to facilitate storage and transportation. The coiling process is the last process of finished product production and has very important significance for ensuring the quality of the cold-rolled sheet strip. With the fierce competition of the steel industry, the requirement on the quality of strip steel is higher and higher, and the uncoiling defect which is easy to occur in the coiling process seriously influences the uncoiling of a downstream production line and the use of customers. The tension is an important parameter in the coiling process, and the product quality and the steel coil appearance are directly influenced.
Disclosure of Invention
The invention provides a method and a device for controlling the coiling tension of strip steel, and solves the technical problem that the strip steel is easy to loose in the coiling process in the prior art.
The invention provides a control method of strip steel coiling tension, which comprises the following steps:
the first stage is as follows: when the head of the strip steel enters the belt wrapper, controlling the coiling tension value to be 35-65 MPa;
and a second stage: when the belt wrapper descends and delays for 4-5 seconds, controlling the coiling tension value to be stepped to 50.05-92.95MPa and then gradually reducing to 38.5-71.5 MPa;
and a third stage: when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the coiling tension value to be gradually reduced to 35-65 MPa;
a fourth stage: when the length of the coiled strip steel reaches 3/5 of the total length of the strip steel, controlling the coiling tension value to be kept at 35-65 MPa;
the fifth stage: when the length of the coiled strip steel reaches 4/5 of the total length of the strip steel, controlling the coiling tension value to gradually increase to 36.75-68.25MPa until the strip steel is coiled;
the coiling tension value of the first stage is smaller than that of the second stage, the coiling tension value of the second stage is larger than that of the third stage, the coiling tension value of the third stage is larger than that of the fourth stage, and the coiling tension value of the fourth stage is smaller than that of the fifth stage.
Further, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 40.0 MPa.
Further, after the belt wrapper descends and is delayed for 4-5 seconds, the coiling tension value is controlled to be stepped to 57.2MPa and then gradually reduced to 44.0 PMa.
Further, when the length of the coiled strip reaches 1/5 of the total length of the strip, the coiling tension value is controlled to be gradually reduced to 40.0 MPa.
Further, when the length of the coiled strip reaches 3/5 of the total length of the strip, the coiling tension value is controlled to be kept at 40.0 MPa.
Further, when the length of the coiled strip reaches 4/5 of the total length of the strip, the coiling tension value is controlled to be gradually increased to 42.0MPa until the coiling of the strip is finished.
The invention also provides a control device for the coiling tension of the strip steel, which comprises:
the first control unit controls the coiling tension value to be 35-65MPa when the head of the strip steel enters the belt wrapper;
the second control unit controls the coiling tension value to be stepped to 50.05-92.95MPa and then gradually reduced to 38.5-71.5MPa after the belt wrapper descends and delays for 4-5 seconds;
the third control unit is used for controlling the coiling tension value to be gradually reduced to 35-65MPa when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel;
the fourth control unit is used for controlling the coiling tension value to be kept at 35-65MPa when the length of the coiled strip steel reaches 3/5 of the total length of the strip steel;
and the fifth control unit controls the coiling tension value to gradually increase to 36.75-68.25MPa when the length of the coiled strip reaches 4/5 of the total length of the strip until the coiling of the strip is finished.
One or more technical schemes provided by the invention at least have the following beneficial effects or advantages:
according to the method and the device for controlling the strip steel coiling tension, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 35-65MPa, and the coiling tension value is used for establishing tension; when the belt wrapper is descended and delayed for 4-5 seconds, controlling the coiling tension value to be 50.05-92.95MPa and then gradually reduced to 38.5-71.5MPa for tension control to prevent the inner ring of the steel coil from being loosened; when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the coiling tension value to be gradually reduced to 35-65MPa, and realizing tension transition; when the length of the coiled strip steel reaches 3/5 of the total length of the strip steel, controlling the coiling tension value to be kept at 35-65MPa, and realizing the normal coiling of the strip steel by controlling the tension; when the length of the coiled steel strip reaches 4/5 of the total length of the steel strip, the coiling tension value is controlled to be gradually increased to 36.75-68.25MPa until the coiling of the steel strip is finished, and the coiling tension value is used for preventing the outer ring of the steel coil from being uncoiled. The method and the device for controlling the coiling tension divide the coiling process into different stages, and can reduce or even avoid the generation of the uncoiling defect of the strip steel in the coiling process by setting the tension of each stage in the coiling process.
Drawings
FIG. 1 is a flowchart of a method for controlling strip steel coiling tension according to an embodiment of the present invention;
FIG. 2 is a block diagram of a control device for strip steel coiling tension according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method and a device for controlling the coiling tension of strip steel, and solves the technical problem that the strip steel is easy to loose in the coiling process in the prior art.
Referring to fig. 1, an embodiment of the present invention provides a method for controlling a coiling tension of a strip steel, where the method includes:
in the first stage S10, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 35-65 MPa.
And in the second stage S20, after the belt wrapper descends and delays for 4-5 seconds, controlling the coiling tension value to be stepped to 50.05-92.95MPa and then gradually reduced to 38.5-71.5 MPa.
And in the third stage S30, when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the coiling tension value to be gradually reduced to 35-65 MPa.
And a fourth stage S40, when the length of the coiled steel strip reaches 3/5 of the total length of the steel strip, controlling the coiling tension value to be kept between 35 and 65 MPa.
And a fifth step S50, when the length of the coiled strip steel reaches 4/5 of the total length of the strip steel, controlling the coiling tension value to gradually increase to 36.75-68.25MPa until the coiling of the strip steel is finished.
The coiling tension value of the first stage is smaller than that of the second stage, the coiling tension value of the second stage is larger than that of the third stage, the coiling tension value of the third stage is larger than that of the fourth stage, and the coiling tension value of the fourth stage is smaller than that of the fifth stage. The winding tensions in the first stage S10, the second stage S20, the third stage S30, the fourth stage S40, and the fifth stage S50 satisfy the above condition restrictions when they are set.
As a preferred embodiment, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 40.0 MPa.
As a preferred embodiment, after the belt wrapper descends and delays for 4-5 seconds, the coiling tension value is controlled to be stepped to 57.2MPa and then gradually reduced to 44.0 PMa.
As a preferred embodiment, when the length of the coiled steel strip reaches 1/5 of the total length of the steel strip, the coiling tension value is controlled to be gradually reduced to 40.0 MPa.
As a preferred embodiment, when the length of the coiled steel strip reaches 3/5 of the total length of the steel strip, the coiling tension value is controlled to be kept at 40.0 MPa.
As a preferred embodiment, when the length of the coiled steel strip reaches 4/5 of the total length of the steel strip, the coiling tension value is controlled to be gradually increased to 42.0MPa until the coiling of the steel strip is finished.
The embodiment of the invention also provides a device for controlling the coiling tension of the strip steel, which comprises:
the first control unit controls the coiling tension value to be 35-65MPa when the head of the strip steel enters the belt wrapper;
the second control unit controls the coiling tension value to be stepped to 50.05-92.95MPa and then gradually reduced to 38.5-71.5MPa after the belt wrapper descends and delays for 4-5 seconds;
the third control unit is used for controlling the coiling tension value to be gradually reduced to 35-65MPa when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel;
the fourth control unit is used for controlling the coiling tension value to be kept at 35-65MPa when the length of the coiled strip steel reaches 3/5 of the total length of the strip steel;
and the fifth control unit controls the coiling tension value to gradually increase to 36.75-68.25MPa when the length of the coiled strip reaches 4/5 of the total length of the strip until the coiling of the strip is finished.
The method and the device for controlling the strip steel coiling tension provided by the invention are described by combining the specific embodiments as follows:
example 1
The method for setting the strip coiling tension provided in this example will be described with reference to steel type SPCC and strip steel with a thickness of 1.0 mm:
referring to fig. 1, the present embodiment provides a method for controlling a winding tension of a strip steel, including:
in the first stage, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 40.0 MPa. Wherein, when the head of the strip steel enters the belt wrapper, the threading speed of the coiler is controlled to be 120 m/min.
And in the second stage, when the belt wrapper descends and delays for 5 seconds, controlling the coiling tension value to be stepped to 57.2MPa and then gradually reducing to 44.0 PMa.
And in the third stage, when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the value of the coiling tension to be gradually reduced to 40.0 MPa.
And in the fourth stage, when the length of the coiled strip reaches 3/5 of the total length of the strip, controlling the coiling tension value to be kept at 40.0 MPa.
And in the fifth stage, when the length of the coiled strip steel reaches 4/5 of the total length of the strip steel, controlling the coiling tension value to gradually increase to 42.0MPa until the coiling of the strip steel is finished.
In this embodiment, the first stage, the second stage, the third stage, the fourth stage, and the fifth stage are performed in sequence.
Example 2
The method for setting the strip coiling tension provided in this example will be described with reference to steel type SPCC and a strip with a thickness of 0.5 mm:
referring to fig. 1, the present embodiment provides a method for controlling a winding tension of a strip steel, including the following steps:
in the first stage, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 55 MPa. Wherein, when the head of the strip steel enters the belt wrapper, the threading speed of the coiler is controlled to be 120 m/min.
And in the second stage, when the belt wrapper descends and delays for 5 seconds, controlling the coiling tension value to step to 70MPa and then gradually reducing to 60 PMa.
And in the third stage, when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the coiling tension value to be gradually reduced to 55 MPa.
And in the fourth stage, when the length of the coiled strip reaches 3/5 of the total length of the strip, controlling the coiling tension value to be kept at 55 MPa.
And in the fifth stage, when the length of the coiled strip steel reaches 4/5 of the total length of the strip steel, controlling the coiling tension value to gradually increase to 60MPa until the coiling of the strip steel is finished.
In this embodiment, the first stage, the second stage, the third stage, the fourth stage, and the fifth stage are performed in order.
Example 3
The method for setting the strip coiling tension provided by the embodiment is described by taking the steel type SPCC and the strip with the thickness of 2.5mm as an example:
referring to fig. 1, the present embodiment provides a method for controlling a winding tension of a strip steel, including:
in the first stage, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 38 MPa.
And in the second stage, when the belt wrapper descends and delays for 4-5 seconds, controlling the coiling tension value to be stepped to 80MPa and then gradually reducing to 50 MPa.
And in the third stage, when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the coiling tension value to be gradually reduced to 38 MPa.
And in the fourth stage, when the length of the coiled strip reaches 3/5 of the total length of the strip, controlling the coiling tension value to be kept at 38 MPa.
And in the fifth stage, when the length of the coiled strip steel reaches 4/5 of the total length of the strip steel, controlling the coiling tension value to gradually increase to 44MPa until the coiling of the strip steel is finished.
Example 4
The method for setting the strip steel coiling tension provided by the embodiment is described by taking a strip steel with the steel grade DC03 and the thickness of 0.5mm as an example:
referring to fig. 1, the present embodiment provides a method for controlling a winding tension of a strip steel, including:
in the first stage, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 50 MPa.
And in the second stage, when the belt wrapper descends and delays for 4-5 seconds, controlling the coiling tension value to be stepped to 70MPa and then gradually reducing to 55 MPa.
And in the third stage, when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the value of the coiling tension to be gradually reduced to 50 MPa.
And in the fourth stage, when the length of the coiled strip reaches 3/5 of the total length of the strip, controlling the coiling tension value to be kept at 50 MPa.
And in the fifth stage, when the length of the coiled strip steel reaches 4/5 of the total length of the strip steel, controlling the coiling tension value to gradually increase to 66MPa until the coiling of the strip steel is finished.
Example 5
The method for setting the strip steel coiling tension provided by the embodiment is described by taking a strip steel with the steel grade DC03 and the thickness of 1.5mm as an example:
referring to fig. 1, the present embodiment provides a method for controlling a winding tension of a strip steel, including:
in the first stage, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 38 MPa.
And in the second stage, when the belt wrapper descends and delays for 4-5 seconds, controlling the coiling tension value to be stepped to 50MPa and then gradually reducing to 42 MPa.
And in the third stage, when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the coiling tension value to be gradually reduced to 38 MPa.
And in the fourth stage, when the length of the coiled strip reaches 3/5 of the total length of the strip, controlling the coiling tension value to be kept at 38 MPa.
And in the fifth stage, when the length of the coiled strip steel reaches 4/5 of the total length of the strip steel, controlling the coiling tension value to gradually increase to 51MPa until the coiling of the strip steel is finished.
Example 6
The method for setting the strip steel coiling tension provided by the embodiment is described by taking a strip steel with the steel grade DP590 and the thickness of 0.5mm as an example:
referring to fig. 1, the present embodiment provides a method for controlling a winding tension of a strip steel, including:
in the first stage, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 58 MPa.
And in the second stage, when the belt wrapper descends and delays for 4-5 seconds, controlling the coiling tension value to be stepped to 73Pa and then gradually reducing to 64 MPa.
And in the third stage, when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the coiling tension value to be gradually reduced to 58 MPa.
And in the fourth stage, when the length of the coiled strip reaches 3/5 of the total length of the strip, controlling the coiling tension value to be kept at 58 MPa.
And in the fifth stage, when the length of the coiled strip steel reaches 4/5 of the total length of the strip steel, controlling the coiling tension value to gradually increase to 66MPa until the coiling of the strip steel is finished.
Example 7
The method for setting the strip steel coiling tension provided by the embodiment is described by taking a strip steel with the steel grade DP590 and the thickness of 2.5mm as an example:
referring to fig. 1, the present embodiment provides a method for controlling a winding tension of a strip steel, including:
in the first stage, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 41 MPa.
And in the second stage, when the belt wrapper descends and delays for 4-5 seconds, controlling the coiling tension value to be stepped to 69MPa and then gradually reducing to 51 MPa.
And in the third stage, when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the coiling tension value to be gradually reduced to 41 MPa.
And in the fourth stage, when the length of the coiled strip reaches 3/5 of the total length of the strip, controlling the coiling tension value to be kept at 41 MPa.
And in the fifth stage, when the length of the coiled strip steel reaches 4/5 of the total length of the strip steel, controlling the coiling tension value to gradually increase to 55MPa until the coiling of the strip steel is finished.
Example 8
The method for setting the strip steel coiling tension provided by the embodiment is described by taking a strip steel with the steel grade DP780 and the thickness of 1.5mm as an example:
referring to fig. 1, the present embodiment provides a method for controlling a winding tension of a strip steel, including:
in the first stage, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 47 MPa.
And in the second stage, when the belt wrapper descends and delays for 4-5 seconds, controlling the coiling tension value to be stepped to 80MPa and then gradually reducing to 62 MPa.
And in the third stage, when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the coiling tension value to be gradually reduced to 47 MPa.
And in the fourth stage, when the length of the coiled strip reaches 3/5 of the total length of the strip, controlling the coiling tension value to be kept at 47 MPa.
And in the fifth stage, when the length of the coiled strip steel reaches 4/5 of the total length of the strip steel, controlling the coiling tension value to gradually increase to 55MPa until the coiling of the strip steel is finished.
Example 9
The method for setting the strip steel coiling tension provided by the embodiment is described by taking a strip steel with the steel grade DP780 and the thickness of 2.5mm as an example:
referring to fig. 1, the present embodiment provides a method for controlling a winding tension of a strip steel, including:
in the first stage, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 44 MPa.
And in the second stage, after the belt wrapper descends and delays for 4-5 seconds, controlling the coiling tension value to be stepped to 59MPa and then gradually reducing to 49 MPa.
And in the third stage, when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the value of the coiling tension to be gradually reduced to 44 MPa.
And in the fourth stage, when the length of the coiled strip reaches 3/5 of the total length of the strip, controlling the coiling tension value to be kept at 44 MPa.
And in the fifth stage, when the length of the coiled strip steel reaches 4/5 of the total length of the strip steel, controlling the coiling tension value to gradually increase to 57MPa until the coiling of the strip steel is finished.
Example 10
Referring to fig. 2, the control device for strip steel coiling tension provided by this embodiment is implemented based on a PLC device, and the device includes:
and the first control unit controls the coiling tension value to be 40.0MPa when the head of the strip steel enters the belt wrapper.
And the second control unit controls the coiling tension value to be stepped to 57.2MPa and then gradually reduced to 44.0PMa after the belt wrapper descends and delays for 5 seconds.
And a third control unit for controlling the coiling tension value to be gradually reduced to 40.0MPa when the length of the coiled strip reaches 1/5 of the total length of the strip.
And a fourth control unit for controlling the coiling tension value to be kept at 40.0MPa when the length of the coiled strip reaches 3/5 of the total length of the strip.
And the fifth control unit controls the coiling tension value to be gradually increased to 42.0MPa when the length of the coiled strip reaches 4/5 of the total length of the strip until the coiling of the strip is finished.
The theoretical basis of the method for setting the coiling tension of the strip steel provided by the embodiment is that the actual friction force between steel coil layers is larger than the static friction force, and the coiling tension of a certain section of the strip steel is increased, so that the actual friction force is increased to avoid coil loosening.
One or more technical schemes provided by the embodiment of the invention at least have the following beneficial effects:
according to the method and the device for controlling the strip steel coiling tension, provided by the embodiment of the invention, when the head of the strip steel enters the belt wrapper, the coiling tension value is controlled to be 35-65MPa, and the coiling tension value is used for establishing tension; when the belt wrapper is descended and delayed for 4-5 seconds, controlling the coiling tension value to be 50.05-92.95MPa and then gradually reduced to 38.5-71.5MPa for tension control to prevent the inner ring of the steel coil from being loosened; when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the coiling tension value to be gradually reduced to 35-65MPa, and realizing tension transition; when the length of the coiled strip steel reaches 3/5 of the total length of the strip steel, controlling the coiling tension value to be kept at 35-65MPa, and realizing the normal coiling of the strip steel by controlling the tension; when the length of the coiled steel strip reaches 4/5 of the total length of the steel strip, the coiling tension value is controlled to be gradually increased to 36.75-68.25MPa until the coiling of the steel strip is finished, and the coiling tension value is used for preventing the outer ring of the steel coil from being uncoiled. The method and the device for controlling the coiling tension divide the coiling process into different stages, and can reduce or even avoid the generation of the uncoiling defect of the strip steel in the coiling process by setting the tension of each stage in the coiling process.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (7)
1. A control method for strip steel coiling tension is characterized by comprising the following steps:
the first stage is as follows: when the head of the strip steel enters the belt wrapper, controlling the coiling tension value to be 35-65 MPa;
and a second stage: when the belt wrapper descends and delays for 4-5 seconds, controlling the coiling tension value to be stepped to 50.05-92.95MPa and then gradually reducing to 38.5-71.5 MPa;
and a third stage: when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel, controlling the coiling tension value to be gradually reduced to 35-65 MPa;
a fourth stage: when the length of the coiled strip steel reaches 3/5 of the total length of the strip steel, controlling the coiling tension value to be kept at 35-65 MPa;
the fifth stage: when the length of the coiled strip steel reaches 4/5 of the total length of the strip steel, controlling the coiling tension value to gradually increase to 36.75-68.25MPa until the strip steel is coiled;
the coiling tension value of the first stage is smaller than that of the second stage, the coiling tension value of the second stage is larger than that of the third stage, the coiling tension value of the third stage is larger than that of the fourth stage, and the coiling tension value of the fourth stage is smaller than that of the fifth stage.
2. The method of controlling a coiling tension of a strip as claimed in claim 1, characterized in that the value of the coiling tension is controlled to be 40.0MPa when the strip head enters the belt wrapper.
3. The method of controlling a coiling tension of a strip steel as claimed in claim 1, characterized in that, after the belt wrapper descends and delays for 4-5 seconds, the coiling tension value is controlled to be stepped to 57.2MPa and then gradually reduced to 44.0 PMa.
4. The strip coiling tension control method as claimed in claim 1, characterized in that when the length of the coiled strip reaches 1/5 of the total length of the strip, the value of the coiling tension is controlled to be gradually reduced to 40.0 MPa.
5. The method of controlling a coiling tension of a steel strip as claimed in claim 1, characterized in that the value of the coiling tension is controlled to be maintained at 40.0MPa when the length of the coiled steel strip reaches 3/5 of the total length of the steel strip.
6. The strip coiling tension control method as claimed in claim 1, characterized in that when the length of the coiled strip reaches 4/5 of the total length of the strip, the coiling tension value is controlled to be gradually increased to 42.0MPa until the coiling of the strip is finished.
7. The utility model provides a control device of strip steel coiling tension which characterized in that includes:
the first control unit controls the coiling tension value to be 35-65MPa when the head of the strip steel enters the belt wrapper;
the second control unit controls the coiling tension value to be stepped to 50.05-92.95MPa and then gradually reduced to 38.5-71.5MPa after the belt wrapper descends and delays for 4-5 seconds;
the third control unit is used for controlling the coiling tension value to be gradually reduced to 35-65MPa when the length of the coiled strip steel reaches 1/5 of the total length of the strip steel;
the fourth control unit is used for controlling the coiling tension value to be kept at 35-65MPa when the length of the coiled strip steel reaches 3/5 of the total length of the strip steel;
and the fifth control unit controls the coiling tension value to gradually increase to 36.75-68.25MPa when the length of the coiled strip reaches 4/5 of the total length of the strip until the coiling of the strip is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810161857.XA CN108405653B (en) | 2018-02-27 | 2018-02-27 | Control method and device for strip steel coiling tension |
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| CN113399460B (en) * | 2021-05-17 | 2022-07-15 | 武汉钢铁有限公司 | Coiling tension control method of thin strip steel in loop type continuous longitudinal shearing and recoiling unit |
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| CN201903793U (en) * | 2010-09-30 | 2011-07-20 | 武汉钢铁(集团)公司 | Tension control device for strip steel processing line coiling region |
| KR101424461B1 (en) * | 2013-01-31 | 2014-08-01 | 현대제철 주식회사 | Method for controlling tension of coiler |
| CN104249091B (en) * | 2013-06-28 | 2017-08-25 | 宝山钢铁股份有限公司 | A kind of control method of orientation silicon steel continuous annealing unit coiling tension |
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