CN113477716A - Method for repairing eccentric sleeve hole of roller box of high-speed wire sizing mill - Google Patents
Method for repairing eccentric sleeve hole of roller box of high-speed wire sizing mill Download PDFInfo
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- CN113477716A CN113477716A CN202110640865.4A CN202110640865A CN113477716A CN 113477716 A CN113477716 A CN 113477716A CN 202110640865 A CN202110640865 A CN 202110640865A CN 113477716 A CN113477716 A CN 113477716A
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- roller box
- eccentric sleeve
- repairing
- sleeve hole
- hole
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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
- B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
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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
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention discloses a method for repairing an eccentric sleeve hole of a roller box of a high-speed wire rod sizing mill, and provides a method for repairing the eccentric sleeve hole of the roller box without causing deformation of the roller box aiming at the problem that the eccentric sleeve hole of the roller box of the sizing mill deforms due to burning loss of an oil film bearing. And (3) enlarging the deformed eccentric sleeve hole of the roller box by using a machine tool according to the maximum deformation, measuring the difference between the enlarged aperture and the aperture required by the design drawing, namely the size needing to be repaired. Repairing the size of the eccentric sleeve hole and the material of the roller box according to the requirements, selecting a steel sheet with the thickness meeting the requirements, and welding the steel sheet to the eccentric sleeve hole of the roller box by adopting a cold welding technology. The repair scheme is adopted to repair the size of the eccentric sleeve hole of the roller box, smaller repair work is adopted for the eccentric sleeve hole of the roller box, the use function of the whole roller box is recovered, a conventional repair welding method is not adopted, the roller box with high value is prevented from being scrapped due to deformation, and the cost for purchasing a new roller box is reduced.
Description
Technical Field
The invention relates to a method for repairing a steel rolling device, in particular to a method for repairing an eccentric sleeve hole of a roller box of a high-speed wire rod sizing mill.
Background
The reducing sizing mill is a final rolling finished product frame for high-speed wire rod production, and is a four-frame roller box type rolling mill unit, the front two frames are reducing sizing mills, and the rear two frames are sizing mills (see figure 1, wherein 1 is a sizing mill inlet roller box, and 2 is a sizing mill outlet roller box). Because the wire rod finished product machine frame is adopted, the sizing mills of the last two machine frames adopt a guide-free rolling design, the distance between the two rolling boxes is small, the volume of the rolling boxes is small, but the rolling speed can reach 112 m/s.
The reducing sizing mill is mainly characterized in that the precise and low-temperature rolling of high-speed wires is realized, and in the actual production process, because the deviation occurs in the control of a front water cooling box of the reducing sizing mill, the temperature of steel is lower than the lowest rolling temperature which can be borne by the reducing sizing mill, and the burning loss of an oil film bearing of a roller box of the sizing mill can be caused. The roller box is deformed due to high temperature generated by burning loss of the oil film bearing, and the deformation of the roller box is mainly represented by the fact that the size of an eccentric sleeve hole of the roller box is changed into an ellipse. The roller box is high in value and needs to be reused after being repaired, but the thickness of the dividing wall of the two eccentric sleeve holes of the roller box is only 6mm, if a conventional repair welding method is adopted, the roller box with high value is scrapped due to deformation, and in addition, the wall thickness of the two eccentric sleeve holes is too thin, so that the roller box cannot be repaired by a sleeve inserting method.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a method for repairing an eccentric sleeve hole of a roller box of a high-speed wire rod sizing mill, aiming at the technical problems that the eccentric sleeve hole of the roller box of the sizing mill deforms due to burning loss of an oil film bearing and the prior art cannot realize repair.
The technical scheme is as follows: the invention relates to a method for repairing an eccentric sleeve hole of a roller box of a high-speed wire sizing mill, which comprises the following steps:
(1) disassembling a roller box of a sizing mill with burned oil film bearing;
(2) measuring two eccentric sleeve holes of a sizing mill roller box to obtain the maximum deformation size of each hole;
(3) reaming according to the maximum deformation size of each hole, and calculating the size of each hole to be repaired;
(4) according to the size of each hole to be repaired and the material of the roller box, selecting a steel sheet with the consistent thickness and surface roughness to manufacture an annular repairing part of each hole;
(5) and respectively welding the annular repairing parts to the corresponding eccentric sleeve holes by adopting a cold welding technology.
In the step (1), after the roller box is disassembled, the roller box body needs to be cleaned. So as to ensure the smooth operation of subsequent measurement, hole expansion and welding operation.
And (3) ensuring the perpendicularity of the eccentric sleeve hole and the surface of the sizing mill roller box, the cylindricity of the eccentric sleeve hole and the parallelism of the two eccentric sleeve holes during reaming. Thereby further ensuring the accuracy of subsequent repair.
Specifically, a three-coordinate precision numerical control machine tool is adopted for reaming.
In the step (3), the size to be repaired is the difference between the size after reaming and the designed aperture of the eccentric trepanning.
Further, the method also comprises the step of measuring the aperture of the repaired eccentric trepanning by a micrometer after welding to verify the repairing result.
Has the advantages that: the invention provides a method for repairing an eccentric sleeve hole of a roller box of a sizing mill and preventing the roller box from deforming, aiming at the problem that the eccentric sleeve hole of the roller box of the sizing mill deforms due to burning loss of an oil film bearing. And (3) enlarging the deformed eccentric sleeve hole of the roller box by using a machine tool according to the maximum deformation, measuring the difference between the enlarged aperture and the aperture required by the design drawing, namely the size needing to be repaired. Repairing the size of the eccentric sleeve hole and the material of the roller box according to the requirements, selecting a steel sheet with the thickness meeting the requirements, and welding the steel sheet to the eccentric sleeve hole of the roller box by adopting a cold welding technology. The repair scheme is adopted to repair the size of the eccentric sleeve hole of the roller box, smaller repair work is adopted for the eccentric sleeve hole of the roller box, the use function of the whole roller box is recovered, a conventional repair welding method is not adopted, the roller box with high value is prevented from being scrapped due to deformation, and the cost for purchasing a new roller box is reduced. The repairing method is simple in process, can be implemented by adopting conventional machining, and is low in repairing cost and good in repairing effect.
Drawings
FIG. 1 is a schematic view of a sizing mill;
FIG. 2 is a flow chart of the operation of the present invention;
FIG. 3 is a schematic illustration of a repair in accordance with an embodiment of the present invention.
Detailed Description
The embodiment is a repairing example of a high-speed wire rod factory where an inventor is located, because the front water cooling box of a reducing sizing mill unit is controlled to have deviation, an oil film bearing of a sizing mill roller box of the factory is burnt, and an eccentric sleeve hole of the sizing mill roller box is repaired according to the method.
As shown in fig. 2 and 3, the repairing steps are as follows:
firstly, the roller box 3 of the sizing mill with the burning loss of the oil film bearing is disintegrated, the roller box 3 of the sizing mill is thoroughly cleaned, and oil stains are removed.
Then, two eccentric trepanning 5 of the sizing mill roller box 3 are measured, and the maximum deformation size of the two eccentric trepanning is obtained through multiple measurement and comparison, wherein the maximum deformation size is the aperture of the maximum deformation position of the deformed eccentric trepanning, and is 144mm in the embodiment.
And (3) reaming is carried out according to the maximum deformation size, and in order to ensure the verticality of the eccentric trepanning 5 and the surface of the sizing mill roller box 3, the cylindricity of the eccentric trepanning 5 and the parallelism of the two eccentric trepanning 5, the eccentric trepanning 5 needs to be enlarged to the maximum deformation size through a three-coordinate precision numerical control machine.
And measuring the difference between the enlarged aperture of the eccentric trepanning 5 and the aperture of the eccentric trepanning 5 required by the original equipment design drawing, namely the size needing to be repaired.
Then, the size of the eccentric sleeve hole and the material of the box body of the sizing mill roller box 3 are repaired as required, and a steel sheet with the thickness, the length, the width and the surface roughness meeting the requirements is selected to manufacture the annular repairing part 4.
And (3) welding the annular repairing part 4 to the eccentric sleeve hole 5 of the roller box by adopting a cold welding technology, and measuring the repaired hole diameter by using a micrometer. After the eccentric sleeve hole of the roller box of the sizing mill is repaired by the scheme, the technical level of the original roller box of the sizing mill is restored by the size of the eccentric sleeve hole, and the using function of the whole roller box of the sizing mill is restored by adopting smaller repairing actions as far as possible.
Since 9 months in 2020 to the present, south steel high-speed wire mills adopt the cold welding technology to repair 4 sizing mill roller box eccentric sleeve holes, wherein 2 sizing mill roller boxes are used for 6 months after being wound, the fixed repair period of the roller box is reached to 6 months, the eccentric sleeve holes are still intact after being wound, and the eccentric sleeve holes can be continuously used after replacing other wearing parts. Other 2 repair roller boxes are also used on line and are normally used at present.
Claims (6)
1. A method for repairing an eccentric sleeve hole of a roller box of a high-speed wire sizing mill is characterized by comprising the following steps:
(1) disassembling a roller box of a sizing mill with burned oil film bearing;
(2) measuring two eccentric sleeve holes of a sizing mill roller box to obtain the maximum deformation size of each hole;
(3) reaming according to the maximum deformation size of each hole, and calculating the size of each hole to be repaired;
(4) according to the size of each hole to be repaired and the material of the roller box, selecting a steel sheet with the consistent thickness and surface roughness to manufacture an annular repairing part of each hole;
(5) and respectively welding the annular repairing parts to the corresponding eccentric sleeve holes by adopting a cold welding technology.
2. The method for repairing the eccentric sleeve hole of the roller box of the high-speed wire rod sizing mill according to claim 1, wherein in the step (1), after the roller box is disassembled, the roller box body needs to be cleaned.
3. The method for repairing the eccentric sleeve hole of the roller box of the high-speed wire rod sizing mill according to claim 1, wherein in the step (3), the perpendicularity of the eccentric sleeve hole and the surface of the roller box of the sizing mill, the cylindricity of the eccentric sleeve hole and the parallelism of the two eccentric sleeve holes are ensured during hole expansion.
4. The method of claim 2, wherein the roller box eccentric bushing hole is reamed using a three-dimensional precision numerically controlled machine tool.
5. The method for repairing the eccentric sleeve hole of the roller box of the high-speed wire sizing mill according to claim 1, wherein in the step (3), the size to be repaired is the difference between the size after reaming and the designed hole diameter of the eccentric sleeve hole.
6. The method for repairing the eccentric trepanning of the roller box of the high-speed wire sizing mill according to claim 1, characterized by further comprising the step of measuring the aperture of the repaired eccentric trepanning by a micrometer after welding to verify the repairing result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110640865.4A CN113477716B (en) | 2021-06-08 | 2021-06-08 | Repairing method for eccentric trepanning of roller box of high-speed wire sizing mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110640865.4A CN113477716B (en) | 2021-06-08 | 2021-06-08 | Repairing method for eccentric trepanning of roller box of high-speed wire sizing mill |
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| Publication Number | Publication Date |
|---|---|
| CN113477716A true CN113477716A (en) | 2021-10-08 |
| CN113477716B CN113477716B (en) | 2023-08-15 |
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| CN202110640865.4A Active CN113477716B (en) | 2021-06-08 | 2021-06-08 | Repairing method for eccentric trepanning of roller box of high-speed wire sizing mill |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444880A (en) * | 2008-12-19 | 2009-06-03 | 沪东重机有限公司 | Method for repairing diesel engine cylinder Glan hole defect |
| CN203649787U (en) * | 2014-01-16 | 2014-06-18 | 瓮福（集团）有限责任公司 | Bearing hole repair device of water pump bearing box |
| CN103990935A (en) * | 2013-02-19 | 2014-08-20 | 宝山钢铁股份有限公司 | Roll shaft repairing method of fast wire mill |
| CN104148874A (en) * | 2014-07-10 | 2014-11-19 | 河北瑞兆激光再制造技术有限公司 | Manual electric arc welding repairing method for abraded bearing block of universal mill vertical roll box |
| CN106424145A (en) * | 2016-08-02 | 2017-02-22 | 无锡天众冶金设备有限公司 | Bushing process for repairing rollers |
| CN107350713A (en) * | 2017-05-25 | 2017-11-17 | 陕西陕煤韩城矿业有限公司 | Box body of speed reducer bearing hole technology for repairing wear |
| CN108927408A (en) * | 2018-05-16 | 2018-12-04 | 西宁特殊钢股份有限公司 | A kind of movement mechanism and restorative procedure of high-precision mm finishing mill unit |
| CN112692510A (en) * | 2020-12-17 | 2021-04-23 | 天津重型装备工程研究有限公司 | Repairing method for local peeling of supporting roller |
-
2021
- 2021-06-08 CN CN202110640865.4A patent/CN113477716B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444880A (en) * | 2008-12-19 | 2009-06-03 | 沪东重机有限公司 | Method for repairing diesel engine cylinder Glan hole defect |
| CN103990935A (en) * | 2013-02-19 | 2014-08-20 | 宝山钢铁股份有限公司 | Roll shaft repairing method of fast wire mill |
| CN203649787U (en) * | 2014-01-16 | 2014-06-18 | 瓮福（集团）有限责任公司 | Bearing hole repair device of water pump bearing box |
| CN104148874A (en) * | 2014-07-10 | 2014-11-19 | 河北瑞兆激光再制造技术有限公司 | Manual electric arc welding repairing method for abraded bearing block of universal mill vertical roll box |
| CN106424145A (en) * | 2016-08-02 | 2017-02-22 | 无锡天众冶金设备有限公司 | Bushing process for repairing rollers |
| CN107350713A (en) * | 2017-05-25 | 2017-11-17 | 陕西陕煤韩城矿业有限公司 | Box body of speed reducer bearing hole technology for repairing wear |
| CN108927408A (en) * | 2018-05-16 | 2018-12-04 | 西宁特殊钢股份有限公司 | A kind of movement mechanism and restorative procedure of high-precision mm finishing mill unit |
| CN112692510A (en) * | 2020-12-17 | 2021-04-23 | 天津重型装备工程研究有限公司 | Repairing method for local peeling of supporting roller |
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| CN113477716B (en) | 2023-08-15 |
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