CN114042882A - Method for improving sizing precision of square billet casting machine through dynamic adjustment - Google Patents
Method for improving sizing precision of square billet casting machine through dynamic adjustment Download PDFInfo
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- CN114042882A CN114042882A CN202111254989.5A CN202111254989A CN114042882A CN 114042882 A CN114042882 A CN 114042882A CN 202111254989 A CN202111254989 A CN 202111254989A CN 114042882 A CN114042882 A CN 114042882A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/163—Controlling or regulating processes or operations for cutting cast stock
Abstract
The invention relates to a method for improving the sizing precision of a square billet casting machine through dynamic adjustment, and belongs to the technical field of metallurgical equipment control. The method comprises the following steps: s1: acquiring the planned length of the produced steel grade and the casting blank; s2: acquiring the real-time temperature of the surface of a casting blank at the position of a cutting machine; s3: according to the steel grade and the planned length of the casting blank obtained in the step S1 and the real-time temperature obtained in the step S2, the cooling shrinkage of the casting blank is obtained through a calculation model; s4: and the process control system carries out fixed length control according to the sum of the planned fixed length and the cooling shrinkage of the casting blank obtained by S3. The invention does not need manual intervention, and can still ensure accurate casting blank sizing when the casting machine pulling speed, the molten steel temperature and the like fluctuate.
Description
Technical Field
The invention belongs to the technical field of metallurgical equipment control, and relates to a method for improving the sizing precision of a square billet casting machine through dynamic adjustment.
Background
The sizing system of the square billet casting machine has the main function of cutting after the casting blank reaches the planned sizing length so as to ensure that the length of the casting blank meets the requirement of the planned sizing. The surface temperature of the casting blank at the position of the cutting machine is 700-.
The shrinkage amount of the casting blank in the process of reducing the temperature from 700 plus material temperature to normal temperature is related to three independent variables of steel type, temperature and fixed length, the traditional cutting system is manually lengthened by depending on experience, and when the steel type, the temperature and the fixed length are changed, manual intervention is needed to adjust the fixed length lengthening amount.
The cutting system of the existing square billet casting machine usually adopts several different forms such as infrared sizing, laser sizing and the like, and does not have the function of dynamic adjustment. Therefore, a method for dynamically adjusting the sizing precision of a square billet casting machine is needed.
Disclosure of Invention
In view of the above, the present invention provides a method for dynamically adjusting and improving the sizing precision of a square billet caster, which ensures that the sizing and the lengthening amount can be automatically adjusted under the condition that the steel grade, the temperature and the total sizing length of a casting blank are changed, so as to meet the requirement that the length of the casting blank after being cooled to normal temperature meets the planned sizing requirement.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for improving the sizing precision of a square billet casting machine through dynamic adjustment specifically comprises the following steps:
s1: acquiring the planned length of the produced steel grade and the casting blank;
s2: acquiring the real-time temperature of the surface of a casting blank at the position of a cutting machine;
s3: according to the steel grade and the planned length of the casting blank obtained in the step S1 and the real-time temperature obtained in the step S2, the cooling shrinkage of the casting blank is obtained through a calculation model;
s4: the process control system L2 performs the length control for the planned length and the sum of the amount of cooling shrinkage of the cast slab calculated in step S3.
Further, in step S1, the steel grade and the planned length of the cast slab are obtained from the operation management and control system L3 by the process control system L2.
Further, in step S2, the real-time temperature of the surface of the casting blank at the position of the cutting machine is obtained by using an infrared temperature measuring device.
Further, in step S2, when the real-time temperature of the surface of the cast slab at the position of the cutting machine is acquired, each stream is measured separately.
Further, in step S3, the calculation model of the amount of cooling contraction of the cast slab is:
A＝(T-T0)/(950-T0)*A0
wherein A is the cooling shrinkage of the casting blank, T is the real-time temperature of the surface of the casting blank measured by a temperature measuring device, and T is0At normal temperature, generally taking 25 ℃; a. the0The length value of the hot billet is taken to ensure the sizing of the cold billet when the surface temperature of the steel grade is 950 ℃.
The invention has the beneficial effects that: the method of the invention does not need manual intervention, and can still ensure accurate casting blank sizing when the casting machine pulling speed, the molten steel temperature and the like fluctuate.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a flow chart of a method for dynamically adjusting and improving the sizing precision of a square billet casting machine according to the invention;
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Referring to fig. 1, a method for dynamically adjusting and improving the sizing precision of a square billet casting machine specifically includes the following steps:
s1: and acquiring the produced steel grade and the planned fixed length of the casting blank from the management and control system L3 by using the process control system L2.
S2: measuring the surface real-time temperature of the casting blank at the position of the cutting machine by using an infrared temperature measuring device (each flow is independently measured) to obtain the surface real-time temperature of the casting blank;
s3: according to the steel grade and the planned length of the casting blank obtained in the step S1 and the real-time temperature obtained in the step S2, the cooling shrinkage of the casting blank is calculated as follows:
A＝(T-T0)/(950-T0)*A0
wherein A is the cooling shrinkage of the casting blank, T is the real-time temperature of the surface of the casting blank measured by a temperature measuring device, and T is0At normal temperature, generally taking 25 ℃; a. the0The length value of the hot billet is taken to ensure the sizing of the cold billet when the surface temperature of the steel grade is 950 ℃.
S4: the process control system L2 performs the length control for the planned length and the sum of the amount of cooling shrinkage of the cast slab calculated in step S3.
Example 1: the method is realized by three parts, namely a casting machine L3, a traditional fixed-length cutting system and an infrared temperature measuring device for each flow of the casting machine. During production, the casting machine sizing L2 reads produced steel type information and casting blank planned sizing length information from L3, an infrared temperature measuring device measures the real-time temperature of the surface of a casting blank at the position of a cutting machine (each stream is measured independently), dynamically controlled casting blank cooling shrinkage is obtained through model calculation by utilizing three independent variables of the steel type, the temperature and the planned sizing length, and the L2 performs length control according to the calculated planned sizing length and the calculated cooling shrinkage.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will 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, and all of them should be covered by the claims of the present invention.
Claims (5)
1. A method for improving the sizing precision of a square billet casting machine through dynamic adjustment is characterized by comprising the following steps:
s1: acquiring the planned length of the produced steel grade and the casting blank;
s2: acquiring the real-time temperature of the surface of a casting blank at the position of a cutting machine;
s3: according to the steel grade and the planned length of the casting blank obtained in the step S1 and the real-time temperature obtained in the step S2, the cooling shrinkage of the casting blank is obtained through a calculation model;
s4: and the process control system carries out fixed length control according to the sum of the planned fixed length and the cooling shrinkage of the casting blank calculated in the step S3.
2. The method for dynamically adjusting and improving the sizing precision of the square billet casting machine according to claim 1, wherein in the step S1, the process control system is used for obtaining the produced steel grade and the planned sizing length of the casting blank from the management and control system.
3. The method for dynamically adjusting and improving the sizing precision of the square billet casting machine according to claim 1, wherein in step S2, the real-time temperature of the surface of the casting blank at the position of the cutting machine is obtained by using an infrared temperature measuring device.
4. The method for dynamically adjusting and improving the sizing accuracy of a billet caster according to claim 1 or 3, wherein in step S2, each stream is measured separately while acquiring the real-time temperature of the surface of the billet at the position of the cutting machine.
5. The method for dynamically adjusting and improving the sizing precision of the square billet casting machine according to claim 1, wherein in the step S3, the calculation model of the cooling shrinkage of the casting blank is as follows:
A＝(T-T0)/(950-T0)*A0
wherein A is the cooling shrinkage of the casting blank, T is the real-time temperature of the surface of the casting blank measured by a temperature measuring device, and T is0Is at normal temperature; a. the0The length value of the hot billet is taken to ensure the sizing of the cold billet when the surface temperature of the steel grade is 950 ℃.
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| CN202111254989.5A CN114042882A (en) | 2021-10-27 | 2021-10-27 | Method for improving sizing precision of square billet casting machine through dynamic adjustment |
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| CN202111254989.5A CN114042882A (en) | 2021-10-27 | 2021-10-27 | Method for improving sizing precision of square billet casting machine through dynamic adjustment |
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Citations (11)
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|---|---|---|---|---|
| BE818452A (en) * | 1973-08-03 | 1975-02-03 | PROCEDURE FOR CUTTING THE STEEL BAR ON THE EXIT FROM A CONTINUOUS CASTING PLANT | |
| JPH01178357A (en) * | 1988-01-08 | 1989-07-14 | Hitachi Ltd | Method for controlling cutting of steel slab |
| JPH02155552A (en) * | 1988-12-06 | 1990-06-14 | Nippon Steel Corp | Method for controlling cutting length in continuous casting equipment |
| JPH06339762A (en) * | 1993-05-31 | 1994-12-13 | Nippon Steel Corp | Method and device for controlling cutting of continuously cast slab |
| JPH09262717A (en) * | 1996-03-27 | 1997-10-07 | Kawasaki Steel Corp | Manufacture of cut plate |
| CN204135306U (en) * | 2014-06-25 | 2015-02-04 | 中冶连铸技术工程有限责任公司 | The online scale weighing system of a kind of multithread many scales continuous casting billet |
| CN104325105A (en) * | 2014-10-29 | 2015-02-04 | 中冶连铸技术工程有限责任公司 | On-line weighing, sizing and correcting method of continuous casting slab |
| CN104959563A (en) * | 2015-07-24 | 2015-10-07 | 山东钢铁股份有限公司 | Calibrating device for laser scale and calibrating method |
| CN107790660A (en) * | 2016-08-30 | 2018-03-13 | 上海梅山钢铁股份有限公司 | A kind of continuous casting billet length accurate measurement method |
| CN111649775A (en) * | 2020-07-03 | 2020-09-11 | 重庆钢铁股份有限公司 | Fault diagnosis method and device for fixed-length shear crankshaft encoder |
| CN112371751A (en) * | 2020-09-10 | 2021-02-19 | 江苏富益材料科技有限公司 | Processing method for improving yield of large-outer-diameter thin-wall thick-aluminum alloy pipe |
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2021
- 2021-10-27 CN CN202111254989.5A patent/CN114042882A/en active Pending
Patent Citations (11)
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|---|---|---|---|---|
| BE818452A (en) * | 1973-08-03 | 1975-02-03 | PROCEDURE FOR CUTTING THE STEEL BAR ON THE EXIT FROM A CONTINUOUS CASTING PLANT | |
| JPH01178357A (en) * | 1988-01-08 | 1989-07-14 | Hitachi Ltd | Method for controlling cutting of steel slab |
| JPH02155552A (en) * | 1988-12-06 | 1990-06-14 | Nippon Steel Corp | Method for controlling cutting length in continuous casting equipment |
| JPH06339762A (en) * | 1993-05-31 | 1994-12-13 | Nippon Steel Corp | Method and device for controlling cutting of continuously cast slab |
| JPH09262717A (en) * | 1996-03-27 | 1997-10-07 | Kawasaki Steel Corp | Manufacture of cut plate |
| CN204135306U (en) * | 2014-06-25 | 2015-02-04 | 中冶连铸技术工程有限责任公司 | The online scale weighing system of a kind of multithread many scales continuous casting billet |
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| CN104959563A (en) * | 2015-07-24 | 2015-10-07 | 山东钢铁股份有限公司 | Calibrating device for laser scale and calibrating method |
| CN107790660A (en) * | 2016-08-30 | 2018-03-13 | 上海梅山钢铁股份有限公司 | A kind of continuous casting billet length accurate measurement method |
| CN111649775A (en) * | 2020-07-03 | 2020-09-11 | 重庆钢铁股份有限公司 | Fault diagnosis method and device for fixed-length shear crankshaft encoder |
| CN112371751A (en) * | 2020-09-10 | 2021-02-19 | 江苏富益材料科技有限公司 | Processing method for improving yield of large-outer-diameter thin-wall thick-aluminum alloy pipe |
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