CN113084111B - Method for correcting pressing precision of continuous casting withdrawal and straightening machine - Google Patents
Method for correcting pressing precision of continuous casting withdrawal and straightening machine Download PDFInfo
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- CN113084111B CN113084111B CN202110317887.7A CN202110317887A CN113084111B CN 113084111 B CN113084111 B CN 113084111B CN 202110317887 A CN202110317887 A CN 202110317887A CN 113084111 B CN113084111 B CN 113084111B
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 48
- 238000003825 pressing Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 238000007731 hot pressing Methods 0.000 claims abstract description 11
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 230000009191 jumping Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000005204 segregation Methods 0.000 abstract description 6
- 238000005266 casting Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
Classifications
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention provides a method for correcting the pressing precision of a continuous casting withdrawal and straightening machine, which comprises the following steps: the method is used for a 5-machine 5-flow continuous casting machine, and the roll gap value detected by a displacement sensor has deviation with the actual roll gap value, so that the method is executed, the hot pressing precision of the continuous casting withdrawal and straightening machine is improved, the center segregation of the continuous casting billet is improved, and the quality stability of the continuous casting billet is improved.
Description
Technical Field
The invention relates to the technical field of continuous casting withdrawal and straightening machines, in particular to a method for correcting the pressing precision of a continuous casting withdrawal and straightening machine.
Background
The continuous casting process of casting high-temperature molten steel into a casting blank with a certain cross-sectional shape and a certain size is called continuous casting. The equipment required for completing the process is called continuous casting complete equipment, and mechanical and electrical liquid of steel casting equipment, continuous casting machine body equipment, cutting area equipment and dummy bar collecting and conveying equipment are integrated to form continuous casting steel core part equipment, which is conventionally called a continuous casting machine.
The advanced continuous casting machine at present is generally provided with a soft reduction device. In the actual production process, although the same process parameters are adopted, the center segregation condition of each flow of casting blank is unstable, namely the same continuous casting machine adopts the same soft reduction process to produce the casting blank, the phenomenon of shrinkage cavity exists in individual flows, and the center segregation is serious; the reason why the above phenomenon occurs is related to the hot pressing accuracy of the withdrawal and straightening unit.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the technical problems of center segregation and unstable quality of the continuous casting billet caused by low hot pressing precision of the traditional continuous casting machine are solved.
The invention provides a method for correcting the pressing precision of a continuous casting withdrawal and straightening machine, which comprises the following steps:
s1, adjusting the hot-pressing pressure of the continuous casting machine to 700kN, and replacing the dummy bar head with a calibration block at normal temperature;
s2, when the calibration block runs to one of the press rollers, pressing the upper press roller to the calibration block, and measuring the roll gap value of the calibration block through a displacement sensor;
s3, if the difference value between the measured roll gap value and the calibrated block size is larger than 0.5mm, adjusting the height of the upper press roll to enable the roll gap value to be equal to the calibrated block size, otherwise, jumping to the step S5;
s4, repeating the steps S1-S3 to enable the difference value between the roll gap value of all the press rolls and the size of the calibration block to be below 0.5 mm;
s5, adjusting the hot pressing pressure of the continuous casting machine to 100 kN;
s6, when the rollers are pressed onto the hot billet, measuring the roll gap value of each roller at the same position of each stream by a displacement sensor, and setting the roll gap value as a1, a2, a3, a4 and a5, respectively, setting a1 as a maximum value, setting a5 as a minimum value, and setting the value a to (a2+ a3+ a 4)/3;
s7, if at least one value of a1, a2, a3, a4 and a5 exceeds a +/-1 mm range, or the later roll gap value is larger than the former roll gap value, detecting equipment pressure sensors, displacement sensors, friction force and roll wear, maintaining or replacing the equipment with abnormal detection, and executing the step S8, otherwise, finishing the correction of the pressing precision of the continuous casting withdrawal and straightening unit;
s8, repeating the steps S1-S6, if at least one value of a1, a2, a3, a4 and a5 exceeds the range of a +/-1 mm, or the roll gap value at the back is larger than that at the front, executing the step S9, otherwise, finishing the rolling precision correction of the continuous casting withdrawal and straightening machine;
and S9, setting the deviation value x as a1-a, a2-a, a3-a, a4-a or a5-a, if | x | is more than 1mm, setting S as the size of the calibration block, adjusting the height of the upper compression roller, and if the adjusted height is S-x, finishing the correction of the pressing precision of the continuous casting withdrawal and straightening machine, otherwise, finishing the correction of the pressing precision of the continuous casting withdrawal and straightening machine.
The method is used for the 5-machine 5-flow continuous casting machine, and the roll gap value detected by the displacement sensor has deviation from the actual roll gap value, so that the method is implemented, the hot pressing precision of the continuous casting withdrawal and straightening machine is improved, the center segregation of the continuous casting billet is improved, and the quality stability of the continuous casting billet is improved.
Detailed Description
The invention relates to a method for correcting the pressing precision of a continuous casting withdrawal and straightening machine, which comprises the following steps:
s1, adjusting the hot-pressing pressure of the continuous casting machine to 700kN, and replacing the dummy bar head with a calibration block at normal temperature;
s2, when the calibration block runs to one of the press rollers, the upper press roller presses the calibration block, and the roll gap value at the calibration block is measured through the displacement sensor;
s3, if the difference value between the measured roll gap value and the calibration block size is larger than 0.5mm, adjusting the height of the upper press roll to ensure that the roll gap value is equal to the calibration block size, otherwise, jumping to the step S5;
s4, repeating the steps S1-S3 to enable the difference value between the roll gap value of all the press rolls and the size of the calibration block to be below 0.5 mm;
s5, adjusting the hot pressing pressure of the continuous casting machine to 100 kN;
s6, when the rollers are pressed onto the hot billet, measuring the roll gap value of each roller at the same position of each stream by a displacement sensor, and setting the roll gap value as a1, a2, a3, a4 and a5, respectively, setting a1 as a maximum value, setting a5 as a minimum value, and setting the value a to (a2+ a3+ a 4)/3;
s7, if at least one value of a1, a2, a3, a4 and a5 exceeds a +/-1 mm range, or the later roll gap value is larger than the former roll gap value, detecting equipment pressure sensors, displacement sensors, friction force and roll wear, maintaining or replacing the equipment with abnormal detection, and executing the step S8, otherwise, finishing the correction of the pressing precision of the continuous casting withdrawal and straightening unit;
s8, repeating the steps S1-S6, if at least one value of a1, a2, a3, a4 and a5 exceeds the range of a +/-1 mm, or the roll gap value at the back is larger than that at the front, executing the step S9, otherwise, finishing the rolling precision correction of the continuous casting withdrawal and straightening machine;
and S9, setting the deviation value x as a1-a, a2-a, a3-a, a4-a or a5-a, if | x | is more than 1mm, setting S as the size of a calibration block, adjusting the height of the upper compression roller, and if the adjusted height is S-x, finishing the correction of the pressing precision of the continuous casting withdrawal and straightening machine, otherwise, finishing the correction of the pressing precision of the continuous casting withdrawal and straightening machine.
The method is used for the 5-machine 5-flow continuous casting machine, and the roll gap value detected by the displacement sensor has deviation from the actual roll gap value, so that the method is implemented, the hot pressing precision of the continuous casting withdrawal and straightening machine is improved, the center segregation of the continuous casting billet is improved, and the quality stability of the continuous casting billet is improved.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (1)
1. A method for correcting the pressing precision of a continuous casting withdrawal and straightening machine is characterized by comprising the following steps:
s1, adjusting the hot-pressing pressure of the continuous casting machine to 700kN, and replacing the dummy bar head with a calibration block at normal temperature;
s2, when the calibration block runs to one of the press rollers, pressing the upper press roller to the calibration block, and measuring the roll gap value of the calibration block through a displacement sensor;
s3, if the difference value between the measured roll gap value and the calibrated block size is larger than 0.5mm, adjusting the height of the upper press roll to enable the roll gap value to be equal to the calibrated block size, otherwise, jumping to the step S5;
s4, repeating the steps S1-S3 to enable the difference value between the roll gap value of all the press rolls and the size of the calibration block to be below 0.5 mm;
s5, adjusting the hot pressing pressure of the continuous casting machine to 100 kN;
s6, when the rollers are pressed onto the hot billet, measuring the roll gap value of each roller at the same position of each stream by a displacement sensor, and setting the roll gap value as a1, a2, a3, a4 and a5, respectively, setting a1 as a maximum value, setting a5 as a minimum value, and setting the value a to (a2+ a3+ a 4)/3;
s7, if at least one value of a1, a2, a3, a4 and a5 exceeds a +/-1 mm range, or the later roll gap value is larger than the former roll gap value, detecting equipment pressure sensors, displacement sensors, friction force and roll wear, maintaining or replacing the equipment with abnormal detection, and executing the step S8, otherwise, finishing the correction of the pressing precision of the continuous casting withdrawal and straightening unit;
s8, repeating the steps S1-S6, if at least one value of a1, a2, a3, a4 and a5 exceeds the range of a +/-1 mm, or the roll gap value at the back is larger than that at the front, executing the step S9, otherwise, finishing the rolling precision correction of the continuous casting withdrawal and straightening machine;
and S9, setting the deviation value x as a1-a, a2-a, a3-a, a4-a or a5-a, if | x | is more than 1mm, setting S as the size of the calibration block, adjusting the height of the upper compression roller, and if the adjusted height is S-x, finishing the correction of the pressing precision of the continuous casting withdrawal and straightening machine, otherwise, finishing the correction of the pressing precision of the continuous casting withdrawal and straightening machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110317887.7A CN113084111B (en) | 2021-03-25 | 2021-03-25 | Method for correcting pressing precision of continuous casting withdrawal and straightening machine |
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| CN202110317887.7A CN113084111B (en) | 2021-03-25 | 2021-03-25 | Method for correcting pressing precision of continuous casting withdrawal and straightening machine |
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| CN113084111A CN113084111A (en) | 2021-07-09 |
| CN113084111B true CN113084111B (en) | 2022-04-08 |
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| CN114951578B (en) * | 2022-05-31 | 2023-07-14 | 北京高创智信冶金科技有限公司 | Light-pressing roll gap control method suitable for continuous casting square billets |
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| CA1111638A (en) * | 1978-06-07 | 1981-11-03 | White Consolidated Industries, Inc. | Rolling mill gauge and flatness calibration system |
| CN104416135B (en) * | 2013-08-30 | 2017-02-08 | 宝山钢铁股份有限公司 | Roll gap calibration method for lightly pressing down tension leveler in square billet continuous casting |
| CN104128581B (en) * | 2014-07-23 | 2016-09-07 | 河北钢铁股份有限公司 | A kind of online calibration method of fan-shaped sections of slab continuous |
| CN106041010B (en) * | 2016-07-25 | 2017-11-24 | 江阴兴澄特种钢铁有限公司 | A kind of continuous casting blooms slighter compress scaling method |
| CN111001772B (en) * | 2019-12-24 | 2021-08-24 | 中冶南方连铸技术工程有限责任公司 | Method and device for controlling roll gap under light pressing or heavy pressing |
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Effective date of registration: 20240310 Address after: 213000 No. 1 Zhongwu Avenue, Changzhou City, Jiangsu Province Patentee after: Zenith Steel Group Co.,Ltd. Country or region after: China Patentee after: Changzhou Zhongtian Special Steel Co.,Ltd. Patentee after: Zhongtian Iron and Steel Group (Huai'an) New Materials Co.,Ltd. Address before: 213000 No. 1 Zhongwu Avenue, Changzhou City, Jiangsu Province Patentee before: Zenith Steel Group Co.,Ltd. Country or region before: China Patentee before: Changzhou Zhongtian Special Steel Co.,Ltd. |
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