CN117399438A - Method for stabilizing head and tail performance in English standard rolling process - Google Patents
Method for stabilizing head and tail performance in English standard rolling process Download PDFInfo
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- CN117399438A CN117399438A CN202311451015.5A CN202311451015A CN117399438A CN 117399438 A CN117399438 A CN 117399438A CN 202311451015 A CN202311451015 A CN 202311451015A CN 117399438 A CN117399438 A CN 117399438A
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- head
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- tank
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- 238000005096 rolling process Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 230000000149 penetrating effect Effects 0.000 claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 238000004364 calculation method Methods 0.000 claims 3
- 239000000047 product Substances 0.000 description 27
- 239000012467 final product Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B21B37/72—Rear end control; Front end control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- 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
-
- 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
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a method for stabilizing head and tail performance in a standard rolling process, which comprises the steps of obtaining rolling specification, standard rolling speed information V, distance L1 between a finished product rack and a head frame water tank, valve opening degree, water penetrating water tank pressure, water penetrating water tank frequency H and water penetrating water tank flow; receiving a current sudden rise signal of the first finished rack biting steel, and debugging the frequency of the water penetrating tank to a first preset frequency value H1 after a first preset time length; after a second preset time period, the frequency of the water penetrating tank is adjusted back to H; receiving a current dip signal of the penultimate finished rack K2 red steel which is separated from the rolling mill, and debugging the frequency of the water passing tank to be a second preset frequency value H2; finishing rolling of the finished product under the rolling specification; has the advantages of high yield of finished products and reduced workload of workers.
Description
Technical Field
The invention relates to the technical field of English standard deformed steel bar rolling, in particular to a method for stabilizing head and tail performance in English standard rolling process.
Background
The method has the following characteristics that the surface quality requirement of the standard threaded steel is high, the rolling speed is low, the performance aspect is required to have requirements on yield strength, the yield of the standard is required to be in the range of 540-650, the ratio of tensile strength to yield strength is more than 1.08, the problem that the yield strength performance of the head and the tail is quite outstanding in the conventional standard rolling process is solved, and therefore, the head and the tail are required to be manually cut for 5-6m on a finished product and removed. Too high a yield strength may result in a poor yield ratio (too low), with a faster rate of yield strength increase than tensile strength.
The method for stabilizing the head and tail performance in the English standard rolling process can solve the problems.
Disclosure of Invention
The invention aims to solve the technical problems that the yield strength performance of the head and the tail of the traditional standard rolling finished product is too high, the yield strength is too high and can lead to unqualified yield strength ratio, and the yield strength is increased faster than the tensile strength, so the invention provides a method for stabilizing the head and the tail in the standard rolling process, which comprises the following steps:
acquiring rolling specification, english standard rolling speed information V, distance L1 between a finished product rack and a head frame water tank, valve opening degree, water penetrating water tank pressure, water penetrating water tank frequency H and water penetrating water tank flow;
receiving a current sudden rise signal of the first finished rack biting steel, and debugging the frequency of the water penetrating tank to a first preset frequency value H1 after a first preset time length;
after a second preset time period, the frequency of the water penetrating tank is adjusted back to H;
receiving a current dip signal of the penultimate finished rack K2 red steel which is separated from the rolling mill, and debugging the frequency of the water passing tank to be a second preset frequency value H2;
and finishing rolling of the finished product under the rolling specification.
Further, the method for calculating the first preset duration further comprises the following steps:
and calculating the time length of the finished product from the finished product rack to the head frame water tank as a first preset time length, namely, the first preset time length is L1/V.
Further, the method for calculating the second preset duration further comprises the following steps:
and calculating the time length of the finished product, which is the second preset time length, when the preset length of the finished product passes through the head frame water tank.
Further, the preset length is 6m.
Further, the method for acquiring the first preset frequency value H1 further comprises the following steps:
and under the rolling specification, establishing a regression equation of the final performance of the head and the debugging frequency to obtain a proper first preset frequency value H1.
Further, the method for calculating the second preset duration further comprises the following steps:
acquiring an interval L2 between a penultimate rack K2 and a penultimate rack K1;
obtaining the outlet linear speed of the penultimate frame K2 as V1;
the second preset time period is calculated as (L1- (6-L2 x (V/V1)))/V.
Further, the method for acquiring the second preset frequency value further comprises the following steps:
and under the rolling specification, establishing a regression equation of the final performance of the tail and the debugging frequency to obtain a proper second preset frequency value H2.
Further, the valve openings were all 100%.
The implementation of the invention has the following beneficial effects:
according to the invention, when the head part and the tail part of the finished product pass through the water penetrating tank, the frequency of the water penetrating tank is adjusted, so that the water penetrating frequency of the head part and the tail part of the finished product pass through the water penetrating tank can enable the performance requirements of the head part and the tail part of the finished product, and after the corresponding frequency of the water penetrating tank is obtained by using a regression equation, the frequency of the water penetrating tank can be automatically controlled, and the production efficiency and the production qualification rate are improved.
Drawings
FIG. 1 is a flow chart of the present invention.
Fig. 2 is a block diagram of the arrangement of the apparatus of the present invention.
FIG. 3 is a graph of regression equation set up for head performance and water penetration frequency of the present invention.
FIG. 4 is a graph of regression equation set up for tail performance and water penetration debugging frequency of the present invention.
Wherein, corresponding reference numerals are as follows: 1-a penetrating water tank.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to the drawings of the specification, the technical problem to be solved in this embodiment is that the yield strength performance of the head and the tail of the existing standard rolling finished product is often too high, the yield strength is too high and can lead to unqualified yield ratio, and the yield strength is increased faster than the tensile strength, so that the method for stabilizing the head and the tail performance in the standard rolling process is provided, and the method for stabilizing the head and the tail performance in the standard rolling process comprises the following steps:
acquiring rolling specification, english standard rolling speed information V, distance L1 between a finished product rack and a head frame water tank, valve opening degree, water penetrating water tank pressure, water penetrating water tank frequency H and water penetrating water tank flow;
receiving a current sudden rise signal of the first finished rack biting steel, and debugging the frequency of the water penetrating tank to a first preset frequency value H1 after a first preset time length;
after a second preset time period, the frequency of the water penetrating tank is adjusted back to H;
receiving a current dip signal of the penultimate finished rack K2 red steel which is separated from the rolling mill, and debugging the frequency of the water passing tank to be a second preset frequency value H2;
and finishing rolling of the finished product under the rolling specification.
The method for calculating the first preset duration further comprises the following steps:
and calculating the time length of the finished product from the finished product rack to the head frame water tank as a first preset time length, namely, the first preset time length is L1/V.
The method for calculating the second preset duration further comprises the following steps:
and calculating the time length of the finished product, which is the second preset time length, when the preset length of the finished product passes through the head frame water tank.
The preset length is 6m.
The method for acquiring the first preset frequency value H1 further comprises the following steps:
and under the rolling specification, establishing a regression equation of the final performance of the head and the debugging frequency to obtain a proper first preset frequency value H1.
The method for calculating the second preset duration further comprises the following steps:
acquiring an interval L2 between a penultimate rack K2 and a penultimate rack K1;
obtaining the outlet linear speed of the penultimate frame K2 as V1;
the second preset time period is calculated as (L1- (6-L2 x (V/V1)))/V.
The method for acquiring the second preset frequency value further comprises the following steps:
and under the rolling specification, establishing a regression equation of the final performance of the tail and the debugging frequency to obtain a proper second preset frequency value H2.
The opening degree of the valve is 100%.
The embodiment also provides an English standard phi 25 multiplied by 2B500B specification rolling as an example;
the rolling speed is 9m/s (finished product outlet linear speed), the distance between the finished product rack and the head frame water tank is 3550mm, the total pressure is 25bar, and the high-pressure water frequency is 45Hz.
The time from the head of the finished product to the first nozzle of the water tank was L1/V (rolling speed) =3550 mm/(9 m/s) =395 ms (milliseconds), L1 being the distance from the centre line of the finished product stand to the centre line of the nozzle of the water tank, 3.55m, V being the finished product stand speed, 9m/s.
Because the water tank is always in an open state in the rolling process, the frequency needs to be reduced to reduce the water pressure when the head of the finished product penetrates through water, so that the temperature drop of the head 6m is matched with the temperature drop of the finished product at the rear section.
The frequency decrease was continued for a period of 6m (L)/(9 m/s) =667 ms, after which the frequency was raised to normal.
And establishing a regression equation of the final performance of the specification head and the debugging frequency, and finding out a proper frequency value H1.
Since when the tail leaves the mill, part of the tail 6m has already entered the mill, the frequency change signal cannot be taken as the final stand, at which point K2 (the penultimate stand is taken as the signal point) is changed to K2 (the penultimate stand is taken as the signal point) and K1 stands at a distance of 4.5m, the K2 outlet linear velocity is 7.2m/s (V1), the volume of the material at the K2 outlet to the K1 outlet is equal according to the second flow (the material shape cross-sectional area in the rolling process=the next frame shape cross-sectional area=the next frame product velocity), the cross-sectional area of 4.5m is 4.5×9/7.2=5.625 m relative to the final screw steel, i.e. after the K2 stand bites the steel signal leaves, the final product of 6m-5.625m has been discharged from the K1 outlet, the final product velocity of 9m/s is advanced, and the time of the end of 6m reaches the water tank is (3.55 m-5.625 m))/(9 m/s) =352. Set to H2. I.e. after the K2 bite signal has disappeared, 352ms, the tank frequency is changed to a certain setting value.
And establishing a regression equation of final performance and debugging frequency of the tail part of the specification, and finding out a proper frequency value H2.
L is the length of the head and tail experience cutting waste, V1 is the outlet linear speed of K2 and is 7.2m, when the K2 biting steel signal disappears according to the fact that the second flow is equal (the sectional area in the rolling process is smaller and smaller), the distance between the end part of the tail 6m (the end part refers to the point which is separated from the tail 6 m) and the water tank is calculated, and then the delay time of the tail water tank for changing the frequency is calculated.
The whole flow is that after K1 has a steel biting signal, 395ms, the frequency of the first water tank is changed into H1 for 667ms, then the normal process frequency H is recovered, after the K2 steel biting signal disappears, 352ms, the frequency of the water tank is changed into H2, and the recovery is carried out after the time for 1000ms (the steel passing interval is far more than the value), so that the signal of the next finished product is not influenced.
In the description of the present invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The method for stabilizing the head and tail performance in the standard rolling process is characterized by comprising the following steps of:
acquiring rolling specification, english standard rolling speed information V, distance L1 between a finished product rack and a head frame water tank, valve opening degree, water penetrating water tank pressure, water penetrating water tank frequency H and water penetrating water tank flow;
receiving a current sudden rise signal of the first finished rack biting steel, and debugging the frequency of the water penetrating tank to a first preset frequency value H1 after a first preset time length;
after a second preset time period, the frequency of the water penetrating tank is adjusted back to H;
receiving a current dip signal of the penultimate finished rack K2 red steel which is separated from the rolling mill, and debugging the frequency of the water passing tank to be a second preset frequency value H2;
and finishing rolling of the finished product under the rolling specification.
2. The method for stabilizing the head-to-tail performance in the standard rolling process according to claim 1, further comprising a calculation method of the first preset duration, comprising:
and calculating the time length of the finished product from the finished product rack to the head frame water tank as a first preset time length, namely, the first preset time length is L1/V.
3. The method for stabilizing the head-tail performance in the standard rolling process according to claim 2, further comprising a calculation method of the second preset duration, comprising:
and calculating the time length of the finished product, which is the second preset time length, when the preset length of the finished product passes through the head frame water tank.
4. A method of stabilizing head-to-tail performance in an standard rolling process according to claim 3, wherein the predetermined length is 6m.
5. The method for stabilizing the head-to-tail performance in the standard rolling process according to claim 4, further comprising the step of obtaining the first preset frequency value H1, comprising:
and under the rolling specification, establishing a regression equation of the final performance of the head and the debugging frequency to obtain a proper first preset frequency value H1.
6. The method for stabilizing the head-to-tail performance in the standard rolling process according to claim 5, further comprising a second preset duration calculation method, comprising:
acquiring an interval L2 between a penultimate rack K2 and a penultimate rack K1;
obtaining the outlet linear speed of the penultimate frame K2 as V1;
the second preset time period is calculated as (L1- (6-L2 x (V/V1)))/V.
7. The method for stabilizing the head-to-tail performance in the standard rolling process according to claim 6, further comprising a second preset frequency value obtaining method, comprising:
and under the rolling specification, establishing a regression equation of the final performance of the tail and the debugging frequency to obtain a proper second preset frequency value H2.
8. The method of stabilizing head and tail performance in an standard rolling process according to claim 7, wherein the valve openings are 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311451015.5A CN117399438A (en) | 2023-11-03 | 2023-11-03 | Method for stabilizing head and tail performance in English standard rolling process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311451015.5A CN117399438A (en) | 2023-11-03 | 2023-11-03 | Method for stabilizing head and tail performance in English standard rolling process |
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| CN117399438A true CN117399438A (en) | 2024-01-16 |
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| CN202311451015.5A Pending CN117399438A (en) | 2023-11-03 | 2023-11-03 | Method for stabilizing head and tail performance in English standard rolling process |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09271821A (en) * | 1996-04-10 | 1997-10-21 | Nippon Steel Corp | Removal method by cooling of skid mark component |
| CN202860997U (en) * | 2012-09-07 | 2013-04-10 | 西林钢铁集团有限公司 | Water-through cooling automatic control device |
| CN104668296A (en) * | 2014-12-11 | 2015-06-03 | 马钢(集团)控股有限公司 | Condition monitoring method of section-steel through-water cooling high-pressure inverter water pumps |
| CN104998912A (en) * | 2015-06-25 | 2015-10-28 | 四川省达州钢铁集团有限责任公司 | Automatic control method for high-line temperature control system |
| CN106345821A (en) * | 2016-08-29 | 2017-01-25 | 四川省达州钢铁集团有限责任公司 | Steel rolling water-penetrating system water tank control method and device |
| CN106955896A (en) * | 2017-03-15 | 2017-07-18 | 中冶华天工程技术有限公司 | Water tank parameter on-line tuning system and method based on rolled piece head and tail temperature difference |
| CN109530461A (en) * | 2018-10-30 | 2019-03-29 | 中冶京诚工程技术有限公司 | Method and device for controlling length of high-speed wire water-cooling uncooled section |
-
2023
- 2023-11-03 CN CN202311451015.5A patent/CN117399438A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09271821A (en) * | 1996-04-10 | 1997-10-21 | Nippon Steel Corp | Removal method by cooling of skid mark component |
| CN202860997U (en) * | 2012-09-07 | 2013-04-10 | 西林钢铁集团有限公司 | Water-through cooling automatic control device |
| CN104668296A (en) * | 2014-12-11 | 2015-06-03 | 马钢(集团)控股有限公司 | Condition monitoring method of section-steel through-water cooling high-pressure inverter water pumps |
| CN104998912A (en) * | 2015-06-25 | 2015-10-28 | 四川省达州钢铁集团有限责任公司 | Automatic control method for high-line temperature control system |
| CN106345821A (en) * | 2016-08-29 | 2017-01-25 | 四川省达州钢铁集团有限责任公司 | Steel rolling water-penetrating system water tank control method and device |
| CN106955896A (en) * | 2017-03-15 | 2017-07-18 | 中冶华天工程技术有限公司 | Water tank parameter on-line tuning system and method based on rolled piece head and tail temperature difference |
| CN109530461A (en) * | 2018-10-30 | 2019-03-29 | 中冶京诚工程技术有限公司 | Method and device for controlling length of high-speed wire water-cooling uncooled section |
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