CN112975298A - Method for reducing bending deformation of asymmetric-structure pulling plate of field-assembled transformer - Google Patents
Method for reducing bending deformation of asymmetric-structure pulling plate of field-assembled transformer Download PDFInfo
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- CN112975298A CN112975298A CN202110300361.8A CN202110300361A CN112975298A CN 112975298 A CN112975298 A CN 112975298A CN 202110300361 A CN202110300361 A CN 202110300361A CN 112975298 A CN112975298 A CN 112975298A
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- pulling plate
- rolling
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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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to a method for reducing bending deformation of an asymmetric-structure pulling plate of a field-assembled transformer, belonging to the technical field of transformer manufacturing. The technical scheme of the invention is as follows: flatly placing the pulling plate on a large-scale oil press platform, rolling 1/3-1/2 of the width range of the non-groove side of the pulling plate by using a hammer, wherein the rolling length is the linear full length, rolling points are rolled from the middle to two ends by weight, the rolling pressure is controlled to generate no visible hammer marks, internal stress generated by flame cutting of a steel plate is preferably homogenized and eliminated, and the rolling is stopped when the straightness of the pulling plate is measured to 0-2mm while pressing edges; and (3) machining the magnetism isolating groove according to a drawing by using a milling machine, machining and drilling by using a drilling machine to finish machining of the pulling plate, and measuring whether the straightness of the pulling plate is within a qualified range. The invention has the beneficial effects that: the method improves the primary processing qualification rate of the asymmetric pull plate of the field assembled transformer, ensures the straightness of the pull plate, improves the product quality, eliminates secondary repair, shortens the processing period and reduces the processing cost.
Description
Technical Field
The invention relates to a method for reducing bending deformation of an asymmetric-structure pulling plate of a field-assembled transformer, belonging to the technical field of transformer manufacturing.
Background
The field-assembled asymmetric-structure pulling plate of the transformer is shown in figure 1, and the straightness of the pulling plate in the length direction after the machining is finished is not more than 3mm in order to ensure the manufacturing quality of the transformer. According to the symmetrical-structure pulling plate processing technique of the conventional transformer, the pulling plate with the asymmetrical structure of the transformer assembled on the spot is processed, the straightness of the processed pulling plate is seriously out of tolerance, and particularly, two end parts of the pulling plate, as shown in figure 4, can cause that two adjacent pulling plates are interfered and cannot be assembled when the pulling plate is used without secondary repair. The secondary repair increases the manufacturing cost and prolongs the processing period.
Disclosure of Invention
The invention aims to provide a method for reducing bending deformation of an asymmetric-structure pulling plate of a field-assembled transformer, which utilizes a large-scale oil press to eliminate internal stress generated by flame cutting of a steel plate, reasonably designs a method, a position and a measuring method for eliminating stress by the oil press to roll the pulling plate, improves the primary processing qualification rate of the asymmetric pulling plate of the field-assembled transformer, ensures the straightness of the pulling plate, improves the product quality, eliminates secondary repair, shortens the processing period, reduces the processing cost and effectively solves the problems in the background technology.
The technical scheme of the invention is as follows: a method for reducing bending deformation of asymmetric structural pull plates of a field-assembled transformer comprises the following steps: cutting the steel plate to the drawing design drawing outline dimension by adopting a numerical control flame gas cutting machine, clamping the drawing on a horizontal milling machine, and processing a single-side large groove according to the drawing; flatly placing the pulling plate on a large-scale oil press platform, rolling 1/3-1/2 of the width range of the non-groove side of the pulling plate by using a hammer, wherein the rolling length is the linear full length, rolling points are rolled from the middle to two ends by weight, the rolling pressure is controlled to generate no visible hammer marks, internal stress generated by flame cutting of a steel plate is preferably homogenized and eliminated, and the rolling is stopped when the straightness of the pulling plate is measured to 0-2mm while pressing edges; and (3) machining the magnetism isolating groove according to a drawing by using a milling machine, machining and drilling by using a drilling machine to finish machining of the pulling plate, and measuring whether the straightness of the pulling plate is within a qualified range.
The invention has the beneficial effects that: the large-scale oil press is used for eliminating the internal stress generated by flame cutting of the steel plate, the method, the position and the measuring method for rolling the asymmetric pulling plate by eliminating the stress of the oil press are reasonably designed, the primary processing qualification rate of the asymmetric pulling plate of the field assembled transformer is improved, the straightness of the pulling plate is ensured, the product quality is improved, the secondary repair is eliminated, the processing period is shortened, and the processing cost is reduced.
Drawings
FIG. 1 is a structural form of an asymmetric pulling plate of a field assembly transformer;
FIG. 2 is a side view of an asymmetric tie plate of a field assembled transformer;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is a schematic view of a deformed strap after being conventionally processed;
FIG. 5 is a schematic view of the rolling range of the oil press after the single-side groove is processed by the pulling plate;
FIG. 6 is a diagram showing a track plate rolling process using a large oil press;
in the figure: rolling direction 1 and rolling width range 2.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments, which are preferred embodiments of the present invention. It is to be understood that the described embodiments are merely a subset of the embodiments of the invention, and not all embodiments; it should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A method for reducing bending deformation of asymmetric structural pull plates of a field-assembled transformer comprises the following steps: cutting a steel plate to the drawing design drawing overall dimension by adopting a numerical control flame gas cutting machine, clamping the drawing on a horizontal milling machine, and processing a single-side large groove according to the drawing, wherein the single-side strength of the drawing is weakened by the processing of the single-side large groove, and the drawing generates vertical bending with the middle concave to the groove side under the action of internal stress of flame cutting; flatly placing the pulling plate on a large-scale oil press platform, rolling 1/3-1/2 of the width range of the non-groove side of the pulling plate by using a hammer, wherein the rolling length is the linear full length, rolling points are rolled from the middle to two ends by weight, the rolling pressure is controlled to generate no visible hammer marks, internal stress generated by flame cutting of a steel plate is preferably homogenized and eliminated, and the rolling is stopped when the straightness of the pulling plate is measured to 0-2mm while pressing edges; and (3) machining the magnetism isolating groove according to a drawing by using a milling machine, machining and drilling by using a drilling machine to finish machining of the pulling plate, and measuring whether the straightness of the pulling plate is within a qualified range.
The field-assembled asymmetric pulling plate of the transformer has the straightness within the range of 0-3mm after being processed once, and meets the assembly and use requirements of the transformer.
Claims (1)
1. A method for reducing bending deformation of asymmetric structural pull plates of a field-assembled transformer is characterized by comprising the following steps: cutting the steel plate to the drawing design drawing outline dimension by adopting a numerical control flame gas cutting machine, clamping the drawing on a horizontal milling machine, and processing a single-side large groove according to the drawing; flatly placing the pulling plate on a large-scale oil press platform, rolling 1/3-1/2 of the width range of the non-groove side of the pulling plate by using a hammer, wherein the rolling length is the linear full length, rolling points are rolled from the middle to two ends by weight, the rolling pressure is controlled to generate no visible hammer marks, internal stress generated by flame cutting of a steel plate is preferably homogenized and eliminated, and the rolling is stopped when the straightness of the pulling plate is measured to 0-2mm while pressing edges; and (3) machining the magnetism isolating groove according to a drawing by using a milling machine, machining and drilling by using a drilling machine to finish machining of the pulling plate, and measuring whether the straightness of the pulling plate is within a qualified range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110300361.8A CN112975298B (en) | 2021-03-22 | 2021-03-22 | Method for reducing bending deformation of asymmetric-structure pulling plate of field-assembled transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110300361.8A CN112975298B (en) | 2021-03-22 | 2021-03-22 | Method for reducing bending deformation of asymmetric-structure pulling plate of field-assembled transformer |
Publications (2)
| Publication Number | Publication Date |
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| CN112975298A true CN112975298A (en) | 2021-06-18 |
| CN112975298B CN112975298B (en) | 2022-10-21 |
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| CN202110300361.8A Active CN112975298B (en) | 2021-03-22 | 2021-03-22 | Method for reducing bending deformation of asymmetric-structure pulling plate of field-assembled transformer |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114687A (en) * | 1993-12-28 | 1996-01-10 | 川崎制铁株式会社 | Mono-orientational electro-magnetic steel plate with low iron loss and manufacture of same |
| CN1672867A (en) * | 2004-03-25 | 2005-09-28 | 气体产品与化学公司 | An apparatus and method for improving work surface during forming and shaping of materials |
| CN101020287A (en) * | 2007-03-06 | 2007-08-22 | 马鞍山钢铁股份有限公司 | Forging and rolling technology and hot rolling and forging apparatus for making large pulley |
| CN101029350A (en) * | 2007-04-20 | 2007-09-05 | 中国航空工业第一集团公司北京航空制造工程研究所 | Process for enbancing surface by high-pressure water jet-flow |
| CN101144142A (en) * | 2007-10-30 | 2008-03-19 | 武汉钢铁(集团)公司 | Heat treatment method of high-strength high-toughness hot continuous rolling steel plate for engineering machine |
| CN101280352A (en) * | 2008-05-21 | 2008-10-08 | 钢铁研究总院 | High-safe high-precision producing method of thermoforming martensitic steel parts |
| CN101579787A (en) * | 2009-06-19 | 2009-11-18 | 天津赛瑞机器设备有限公司 | Manufacturing method of steel-rolling cooling bed roller-oriented support platform |
| CN103433699A (en) * | 2013-08-13 | 2013-12-11 | 中铁山桥集团有限公司 | Machining method for perforated U-shaped rib |
| CN106271413A (en) * | 2016-08-23 | 2017-01-04 | 天津惠蓬海洋工程有限公司 | A kind of high duty metal flat board connection dimension accuracy control method |
-
2021
- 2021-03-22 CN CN202110300361.8A patent/CN112975298B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114687A (en) * | 1993-12-28 | 1996-01-10 | 川崎制铁株式会社 | Mono-orientational electro-magnetic steel plate with low iron loss and manufacture of same |
| CN1672867A (en) * | 2004-03-25 | 2005-09-28 | 气体产品与化学公司 | An apparatus and method for improving work surface during forming and shaping of materials |
| CN101020287A (en) * | 2007-03-06 | 2007-08-22 | 马鞍山钢铁股份有限公司 | Forging and rolling technology and hot rolling and forging apparatus for making large pulley |
| CN101029350A (en) * | 2007-04-20 | 2007-09-05 | 中国航空工业第一集团公司北京航空制造工程研究所 | Process for enbancing surface by high-pressure water jet-flow |
| CN101144142A (en) * | 2007-10-30 | 2008-03-19 | 武汉钢铁(集团)公司 | Heat treatment method of high-strength high-toughness hot continuous rolling steel plate for engineering machine |
| CN101280352A (en) * | 2008-05-21 | 2008-10-08 | 钢铁研究总院 | High-safe high-precision producing method of thermoforming martensitic steel parts |
| CN101579787A (en) * | 2009-06-19 | 2009-11-18 | 天津赛瑞机器设备有限公司 | Manufacturing method of steel-rolling cooling bed roller-oriented support platform |
| CN103433699A (en) * | 2013-08-13 | 2013-12-11 | 中铁山桥集团有限公司 | Machining method for perforated U-shaped rib |
| CN106271413A (en) * | 2016-08-23 | 2017-01-04 | 天津惠蓬海洋工程有限公司 | A kind of high duty metal flat board connection dimension accuracy control method |
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| 郭源成等: "变压器拉板制造工艺改造", 《变压器》 * |
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| CN112975298B (en) | 2022-10-21 |
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