CN108927408B - Core mechanism of high-precision finishing mill group and repairing method - Google Patents
Core mechanism of high-precision finishing mill group and repairing method Download PDFInfo
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- CN108927408B CN108927408B CN201810469304.0A CN201810469304A CN108927408B CN 108927408 B CN108927408 B CN 108927408B CN 201810469304 A CN201810469304 A CN 201810469304A CN 108927408 B CN108927408 B CN 108927408B
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- repair area
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
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Abstract
The invention discloses a core mechanism of a high-precision finishing mill group, which comprises a plurality of core mechanisms, wherein each core mechanism comprises a guide wheel and a roll collar, an area which is fixed at the center of a frame of the core mechanism and is positioned below the outlet end of the core mechanism is a repair area, the upper end surface of the repair area is provided with calibration coordinate points which are distributed annularly, the repair area is provided with a step hole which is small at the bottom and large at the top, the center of the repair area is fixed with a processing embedded part which is matched with the repair area, the center of the processing embedded part is provided with a large through hole, the outer ring of the large through hole is provided with three fan-shaped sheets which are distributed in a Y shape, the outer edge of the upper end surface of each fan-shaped sheet is provided with an annular step which is matched with the; and a small through hole is formed in the machining embedded part corresponding to the calibration coordinate point. Compared with the prior art, the invention effectively avoids that the coordinate point can not be found in the calibration process, and realizes the infinite extension of the service life of the core mechanism.
Description
Technical Field
The invention relates to the technical field of machinery, in particular to a core mechanism of a high-precision finishing mill group and a repairing method.
Background
In the production process of the high-precision finishing mill group, a core mechanism of the high-precision finishing mill group often has a plurality of problems of steel piling impact deformation and the like, so that the production cannot be smoothly carried out.
The structure of the existing core mechanism of the high-precision finishing mill group is shown in figures 1 and 2, and comprises a plurality of core mechanisms, wherein each core mechanism comprises a guide wheel 2 and a roller ring 3, the area, which is fixed at the center of a frame 1 of each core mechanism and is positioned below the outlet end of each core mechanism, is a repair area, the repair area is provided with calibration coordinate points distributed in an annular mode, and the main reason that the core mechanisms are subjected to steel piling impact deformation frequently is analyzed as follows: the guide wheel 2 supports the bar and sends the bar into the roll collar 3, and the steel is discharged along the direction of the rolling central line, so that the bar is rolled to the required range, and a finished product is finally produced through alternative rolling. In order to prevent the bar from not moving on the rolling central line of the core mechanism, before the core mechanism is on line, a coordinate point (shown in figure 2) on the rack is calibrated through a special validation tool, and the calibrated data is uploaded to a server, so that normal rolling is finally realized. However, during the rolling process, the guide wheel 2 fails, the roll collar 3 is damaged and the like, and the bar does not move according to the set rolling route to bring great impact force to the repair area (shown in fig. 2), so that the repair area is seriously deformed. Therefore, the coordinate point cannot be found in the off-line recalibration process of the core mechanism, so that the calibration cannot be carried out, and the core mechanism cannot be used and can only be scrapped.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a core mechanism of a high-precision finishing mill group and a repairing method.
In order to achieve the purpose, the invention is implemented according to the following technical scheme:
a core mechanism of a high-precision finishing mill group comprises a plurality of core mechanisms, wherein each core mechanism comprises a guide wheel and a roll collar, an area which is fixed at the center of a frame of the core mechanism and is positioned below the outlet end of the core mechanism is a repairing area, the upper end surface of the repairing area is provided with calibration coordinate points which are distributed annularly, the repairing area is provided with a step hole which is small at the bottom and large at the top, the center of the repairing area is fixed with a processing embedded part which is matched with the repairing area, the center of the processing embedded part is provided with a large through hole, the outer ring of the large through hole is provided with three fan-shaped sheets which are distributed in a Y shape, the outer edge of the upper end surface of each fan-shaped sheet is provided with an annular step which is matched with the step hole, and; and a small through hole is formed in the machining embedded part corresponding to the calibration coordinate point.
The further technical scheme is that a screw hole is formed in an annular step of the processing insert, a screw hole is also formed in a repair area of the step hole position corresponding to the processing insert, and the processing insert is fixedly connected with the repair area through a screw.
The further technical scheme is that the screw hole on the annular step of the processing insert is a step screw hole.
In addition, the invention also provides a method for repairing the core mechanism of the high-precision finishing mill group, which comprises the following steps:
firstly, machining a small-bottom large-top step hole on the upper end face of a repair area at the center of the front face of a frame by using a boring mill;
machining a machining embedded part, assembling the machining embedded part and the repair area by using a screw, and welding the connecting part of the machining embedded part and the rack;
and step three, after assembly, the machined embedded part and the repair area are bored and leveled by using a boring machine with the front surface as a reference, and the verticality, the planeness and the parallelism are rechecked to ensure the original numerical value.
Compared with the prior art, the invention is improved on the basis of the structure of the existing core mechanism, thereby not only being convenient to manufacture, but also effectively reducing the resource waste; the assembly of the insert after the boring is processed at the outlet end can effectively ensure the original values of verticality, planeness, parallelism and the like, and ensure the hole distance to ensure the relative position precision of each hole. Therefore, the situation that coordinate points cannot be found in the calibration process is effectively avoided, and the service life of the core mechanism is infinitely prolonged.
Drawings
Fig. 1 is a front view of a conventional core mechanism of a high-precision finishing mill group.
Fig. 2 is a view of a repair area of a conventional core mechanism of a high-precision finishing mill group.
Fig. 3 is a general view of the assembly of the insert for front face machining of the core mechanism of the high-precision finishing block.
Fig. 4 is a sectional view a-a of fig. 3.
FIG. 5 is a front side machining insert view of a high precision finishing block core mechanism.
Detailed Description
The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 3, 4, and 5, the core mechanism of the high-precision finishing mill set of this embodiment includes a plurality of core mechanisms, each core mechanism includes a guide wheel 2 and a roller ring 3, a region fixed at the center of a frame 1 of the core mechanism and located below an outlet end of the core mechanism is a repair region 4, a calibration coordinate point 5 in annular distribution is provided on the repair region 4, a step hole with a smaller lower part and a larger part is provided on an upper end surface of the repair region 4, a processing insert 6 matched with the repair region 4 is fixed at the center of the repair region 4, a large through hole 61 is provided at the center of the processing insert 6, three fan-shaped pieces 62 in Y-shaped distribution are provided on an outer ring of the large through hole 61, an annular step matched with the step hole is provided on an outer edge of the upper end surface of the fan-shaped piece 62, and the upper end surfaces of the processing insert 6 and the repair region 4; and a small through hole 7 is formed in the machining embedded part 6 corresponding to the calibration coordinate point 5.
The annular step of the processing insert 6 is provided with a screw hole 8, the screw hole on the annular step of the processing insert 6 is a step screw hole, the repair area 4 of the step hole position corresponding to the processing insert 6 is also provided with a screw hole, and the processing insert 6 is fixedly connected with the repair area 4 by screws.
A method for repairing a core mechanism of a high-precision finishing mill group comprises the following steps:
firstly, machining a small-lower large-upper step hole on the upper end face of a repair area 4 in the center of the front face of a frame 1 by using a boring mill;
machining a machining insert 6, assembling the machining insert 6 with the repair area 4 by using screws, and welding the connecting part of the machining insert 6 and the rack 1;
and step three, after assembly, the machining embedded part 6 and the repair area 4 are bored and leveled by using a boring machine with the front surface as a reference, and the perpendicularity, the planeness and the parallelism are rechecked to ensure the original numerical values.
The repairing method using the movement mechanism of the invention comprises the following steps: in the production process of the high-precision finishing mill group from 2015 to 2018, 2, 20 days, no problem occurs in the calibration of a machine core, more than 40 specifications from phi 19mm to phi 81mm are produced in total, the total production is 172773.62 tons, and after each production specification is finished, the machine core mechanism of the high-precision finishing mill group is inspected and calibrated, so that the phenomenon that the machine core cannot be calibrated is avoided.
Therefore, the method for repairing the core mechanism thoroughly solves a series of problems in the production process of the original high-precision finishing mill group, effectively reduces resource waste and effectively ensures the smooth production.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (4)
1. A core mechanism of a high-precision finishing mill group comprises a plurality of core structures and is characterized in that each core structure comprises a guide wheel and a roll collar, an area which is fixed at the center of a frame of the core structure and is positioned below the outlet end of the core structure is a repair area, calibration coordinate points which are distributed in an annular mode are arranged on the repair area, step holes which are small at the bottom and large at the top are formed in the upper end face of the repair area, a machining embedded part which is matched with the repair area is fixed at the center of the repair area, a large through hole is formed in the center of the machining embedded part, three fan-shaped pieces which are distributed in a Y shape are arranged on the outer ring of the large through hole, annular steps which are matched with the step holes are formed in the outer edge of the upper end face of each fan-shaped piece, and; and a small through hole is formed in the machining embedded part corresponding to the calibration coordinate point.
2. The movement mechanism of a high precision finishing mill train according to claim 1, characterized in that: the annular step of the processing insert is provided with a screw hole, the repair area of the step hole position corresponding to the processing insert is also provided with a screw hole, and the processing insert is fixedly connected with the repair area by a screw.
3. The movement mechanism of a high precision finishing mill train according to claim 1 or 2, characterized in that: the screw hole on the annular step of the processing insert is a step screw hole.
4. A method for repairing a movement mechanism of a high precision finishing mill train as claimed in claim 1, characterized by comprising the steps of:
firstly, machining a small-bottom large-top step hole on the upper end face of a repair area at the center of the front face of a frame by using a boring mill;
machining a machining embedded part, assembling the machining embedded part and the repair area by using a screw, and welding the connecting part of the machining embedded part and the rack;
and step three, after assembly, the machined embedded part and the repair area are leveled by boring with a boring machine by taking the front face as a reference, and the verticality, the planeness and the parallelism are rechecked to ensure the original numerical value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810469304.0A CN108927408B (en) | 2018-05-16 | 2018-05-16 | Core mechanism of high-precision finishing mill group and repairing method |
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| CN201810469304.0A CN108927408B (en) | 2018-05-16 | 2018-05-16 | Core mechanism of high-precision finishing mill group and repairing method |
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| CN108927408A CN108927408A (en) | 2018-12-04 |
| CN108927408B true CN108927408B (en) | 2021-04-30 |
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| CN113477716B (en) * | 2021-06-08 | 2023-08-15 | 南京钢铁股份有限公司 | Repairing method for eccentric trepanning of roller box of high-speed wire sizing mill |
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| JP2703814B2 (en) * | 1989-12-04 | 1998-01-26 | 住友重機械工業株式会社 | Inner housing type multiple roll rolling mill |
| JP3132333B2 (en) * | 1995-04-21 | 2001-02-05 | 日本鋼管株式会社 | Camber reduction method in metal sheet rolling |
| CN1522806A (en) * | 2003-02-17 | 2004-08-25 | 攀钢集团成都钢铁有限责任公司 | Tube rolling set large-scale member repairing by macromolecular complex material and its process |
| CN101433908A (en) * | 2008-12-15 | 2009-05-20 | 秦建平 | Equipment used in tandem rolling production line for rolling metallic rod wire |
| CN101934291B (en) * | 2009-06-30 | 2014-02-19 | 上海宝钢工业检测公司 | Center-aligning method of high-speed wire stock finishing mill |
| CN102039316B (en) * | 2009-10-10 | 2012-07-11 | 北京理工大学 | Zero-point calibration method for hot continuous rolling machine frame |
| CN102989774B (en) * | 2012-12-18 | 2015-01-21 | 中冶京诚工程技术有限公司 | Combined three-roller continuous rolling mill |
| CN105880298A (en) * | 2015-01-26 | 2016-08-24 | 鞍钢股份有限公司 | Centering calibration method for rolling center line |
| CN106944476B (en) * | 2017-03-30 | 2019-03-29 | 重庆泓美仪表有限责任公司 | A kind of compact subtracts sizing apparatus |
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