CN113996693A - Method for preparing motor iron core - Google Patents
Method for preparing motor iron core Download PDFInfo
- Publication number
- CN113996693A CN113996693A CN202111348465.2A CN202111348465A CN113996693A CN 113996693 A CN113996693 A CN 113996693A CN 202111348465 A CN202111348465 A CN 202111348465A CN 113996693 A CN113996693 A CN 113996693A
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- China
- Prior art keywords
- shaping
- die
- plate
- female die
- iron core
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/06—Removing local distortions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention relates to a method for preparing a motor iron core, which comprises the following steps: step S1: drawing and forming the plate; step S2: shaping the different-layer drawn and formed part; step S3: carrying out compact compaction and fitting treatment on the integrally formed piece; step S4: and machining the tightly attached formed part to obtain the motor iron core. The method for preparing the motor iron core can reduce the magnetic resistance, reduce the heat loss of the motor, effectively improve the forming quality of the motor iron core, and greatly prolong the service life of the motor by applying the iron core to prepare the motor; meanwhile, the problems of burrs, tearing and the like in the traditional method can be avoided, the forming quality of the motor iron core is effectively improved, and the method is simple in process and easy to operate.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a method for preparing a motor iron core.
Background
At present, most of motors adopt non-oriented silicon steel materials as iron cores. The preparation of the motor core typically goes through the following process steps: firstly, a blanking die is adopted to continuously blank the non-oriented silicon steel sheet at a high speed to form the shape required by the motor iron core, and then a large number of punched sheets are fixed by riveting, welding, gluing and other methods. After being fixed, part of the iron core is subjected to stress relief annealing in order to improve the magnetic performance of the iron core, and is subjected to hot press assembly after being inserted into a coil winding, so that the iron core is fixed in a motor shell.
However, the blanking process may cause phenomena such as burrs, tearing, bending, springback and the like, which affect the mechanical properties of the non-oriented silicon steel sheet, and the production efficiency is low; the motor iron core structure prepared by riveting, welding, cementing and other methods has larger magnetic resistance, so that the motor temperature is too high in the using process, the motor cannot be used for a long time, and the working efficiency of the motor is influenced.
Therefore, how to improve the production efficiency, reduce the magnetic resistance, and reduce the heat loss during the operation of the motor becomes one of the problems to be solved by those skilled in the art.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method for manufacturing a motor core, in which a formed part obtained by the present invention can reduce magnetic resistance, and solve the problems of serious heat generation and the like of the original motor.
The technical scheme adopted by the invention is as follows:
the invention provides a method for preparing a motor iron core, which comprises the following steps:
s1: drawing and forming the plate; specifically comprises
(S1.1) cutting and blanking the blank to obtain a plate material;
(S1.2) stacking the plates to obtain a multilayer plate;
(S1.3) deep drawing and forming the multilayer plate by adopting a deep drawing die to obtain a multilayer deep drawing formed piece;
s2: shaping the multilayer deep-drawn formed part by using a shaping die to obtain a multilayer shaped part which is tightly attached and the bottom fillet of which is approximately converted into a right angle;
s3: carrying out tight compaction and lamination treatment on the multilayer shaped piece; specifically comprises
(S3.1) selecting a multilayer plastic forming part for nesting;
(S3.1) tightly compacting and attaching the overlapped and sleeved multi-layer shaping forming piece to obtain a tightly attached forming piece;
s4: and machining the tightly attached formed part to obtain the motor iron core.
Further, in the step (S1.2), a single-layer board stacking or a multi-layer board stacking is adopted for stacking the deep boards.
Further, in the step (S1.3), the drawing forming is performed by normal drawing forming, vibration energy field assisted drawing forming, magnetic field assisted drawing forming or electric field assisted drawing forming.
Further, the deep drawing die comprises a male die, a blank holder and a female die; the blank holder is coaxially arranged above the female die; the male die is coaxially arranged in the axle centers of the blank holder and the female die; during drawing, the plate is arranged between the blank holder and the female die, the plate arranged between the female die and the blank holder generates plastic deformation under the action of the male die, and the plate is continuously pulled into a gap between the male die and the female die by the male die to form a drawn forming piece.
Further, the shaping die comprises a shaping compression ring, a shaping male die, a shaping female die and a base; the shaping female die is coaxially sleeved on the lower part of the shaping compression ring; the shaping male die is coaxially arranged in the axes of the shaping compression ring and the shaping female die; the base is arranged at the bottom end of the shaping female die; the deep drawing forming piece is arranged between the shaping female die and the bottom end of the shaping compression ring; under plastic clamping ring and plastic terrace die effect, the regional sheet material of fillet produces plastic deformation to along with the continuation of plastic clamping ring pushes down, the regional space of fillet is eliminated gradually and form the fillet and change into the plastic forming part of the approximate right angle of closely laminating.
Compared with the prior art, the invention has the following beneficial effects:
compared with the traditional motor iron core forming method, the method for preparing the motor iron core provided by the invention has the advantages that the formed part obtained by the method can reduce the magnetic resistance, and simultaneously solves the problem of serious heating of the original motor, so that the heat loss of the motor is reduced, and the service life of the motor can be greatly prolonged. The method provided by the invention can effectively avoid the problems of burrs, tearing and the like in the traditional method, effectively improves the forming quality of the motor iron core, and is simple in process and easy to operate.
Drawings
Fig. 1 is a flowchart of a method for manufacturing an iron core of an electric machine according to the present invention;
FIG. 2 is a schematic diagram of the motor core drawing of the present invention;
FIG. 3 is a schematic view of a reforming mold according to the present invention;
fig. 4 is a schematic diagram of magnetic force line distribution of the motor core prepared by the present invention and the motor core prepared by the existing method.
Wherein, the reference numbers: 1-male die; 2-blank holder; 3-plate material; 4-a female die; 5-deep drawing forming piece; 6-shaping a compression ring; 7-shaping male die; 8-shaping a female die; 9-a base; 10-a shaped piece; 11-iron core round piece; 12-iron core arc sheet; 13-a weld; 14-magnetic lines of force; 15-magnetic resistance.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
The method for preparing the motor iron core provided by the invention comprises the following specific implementation steps as shown in figures 1 to 3:
s1: drawing and forming the plate; the specific process is as follows
(S1.1) cutting and blanking the blank to obtain a plate to be drawn; specifically, in the embodiment, a wire cutting tool is used for cutting and blanking a non-oriented silicon steel plate with the thickness of 0.5mm to obtain a circular plate material 3 to be drawn;
(S1.2) stacking the plate materials 3 to be drawn to obtain a multi-layer plate material; the stacking of the plate 3 to be drawn can adopt single-layer plate stacking or multi-layer plate stacking; specifically, in this embodiment, a three-layer plate stacking manner is adopted to stack the circular plate 3 to be deep-drawn to obtain a three-layer plate;
(S1.3) deep drawing and forming the multilayer plate by adopting a deep drawing die to obtain a multilayer deep drawing formed piece; in the embodiment, the deep drawing die comprises a male die 1, a blank holder 2 and a female die 4; the blank holder 2 is coaxially arranged above the female die 4; the male die 1 is coaxially arranged in the axle centers of the blank holder 2 and the female die 4; the drawing forming can adopt conventional drawing forming, vibration energy field auxiliary drawing forming, magnetic field auxiliary drawing forming or electric field auxiliary drawing forming; specifically, in the present embodiment, an ultrasonic vibration assisted drawing forming method is adopted to perform drawing forming on the three-layer plate 3, and first, an ultrasonic vibration device is started to make the three-layer plate 3 in a certain vibration frequency state; then, under the action of the male die 1, the three-layer plate 3 in a certain vibration frequency state is placed between the female die 4 and the blank holder 2, the plate 3 generates plastic deformation, and the three-layer plate is continuously pulled into a gap between the male die 1 and the female die 4 by the male die 1 to form a three-layer deep-drawing forming part 5;
s2: shaping the different-layer drawn forming piece 5 by using a shaping die to obtain a tightly attached multilayer shaped forming piece, wherein the bottom fillet is approximately converted into a right angle; in the embodiment, the shaping mold comprises a shaping compression ring 6, a shaping convex mold 7, a shaping concave mold 8 and a base 9; the shaping female die 8 is coaxially sleeved on the lower part of the shaping compression ring 6; the shaping male die 7 is coaxially arranged in the axial centers of the shaping compression ring 6 and the shaping female die 8; the base 9 is arranged at the bottom end of the shaping female die 8; the three-layer deep-drawing formed part 5 is arranged at the bottom in the shaping female die 8, and the top of the outer circumference is positioned at the bottom end of the inner circumference of the shaping compression ring 6; specifically, in this embodiment, under the action of the shaping press ring 6 and the shaping convex die 7, the three-layer deep-drawing formed part 5 generates plastic deformation on the plate material in the fillet area, and along with the continuous pressing of the shaping press ring 6, the gap in the fillet area is gradually eliminated to form the three-layer shaping formed part 10 in which the fillet is changed into an approximate right-angle close fit.
S3: carrying out tight compaction and lamination treatment on the multilayer shaped piece; the specific process is as follows
(S3.1) selecting a multilayer plastic forming part for nesting; specifically, in the present embodiment, two three-layer plastic forming members 10 are selected to be overlapped;
(S3.2) tightly compacting and attaching the overlapped and sleeved multi-layer shaping forming piece to obtain a tightly attached forming piece; specifically, in this embodiment, two three-layer formed pieces 10 that are stacked together are placed between the shaping male die 7 and the shaping female die 8, and six-layer formed pieces that are tightly attached are formed along with downward movement of the shaping press ring 6.
S4: machining the tightly attached formed part to obtain a motor iron core; specifically, in this example, the redundant part of the straight-wall opening of the tightly-attached six-layer formed part is cut off, and a circular notch at the center of the bottom of the motor iron core is cut off, so as to finally obtain the linear motor iron core of the type.
As shown in fig. 4, for a schematic distribution diagram of magnetic force lines of an iron core of a motor prepared by a new and old process, the iron core circular sheet 11 and the iron core arc sheet 12 are welded (or riveted, glued, etc.) together after being blanked and laminated in the conventional process, the iron core structure prepared by the method has a welding point 13, so that discontinuity of materials is caused, the magnetic resistance 15 is increased due to the discontinuity of the materials, propagation of the magnetic force lines 14 is blocked in the working process of the motor, and heat loss of the motor is increased, so that the motor cannot be used for a long time, and the working efficiency of the motor is influenced. The method provided by the invention has the advantages that the iron core structure which is subjected to deep drawing forming, shaping, compacting, fitting and processing and is machined and prepared enables the material to be in a continuous state, compared with the traditional process, the reluctance is reduced by 15, and the propagation of magnetic lines of force 14 is facilitated, so that the heat loss of the motor is reduced, the service time of the motor can be prolonged, and the working efficiency of the motor is improved.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (5)
1. A method for preparing a motor iron core is characterized by comprising the following steps:
s1: drawing and forming the plate; specifically comprises
(S1.1) cutting and blanking the blank to obtain a plate material;
(S1.2) stacking the plates to obtain a multilayer plate;
(S1.3) deep drawing and forming the multilayer plate by adopting a deep drawing die to obtain a multilayer deep drawing formed piece;
s2: shaping the multilayer deep-drawn formed part by using a shaping die to obtain a multilayer shaped part which is tightly attached and the bottom fillet of which is approximately converted into a right angle;
s3: carrying out tight compaction and lamination treatment on the multilayer shaped piece; specifically comprises
(S3.1) selecting a multilayer plastic forming part for nesting;
(S3.1) tightly compacting and attaching the overlapped and sleeved multi-layer shaping forming piece to obtain a tightly attached forming piece;
s4: and machining the tightly attached formed part to obtain the motor iron core.
2. The method of manufacturing an electric machine core according to claim 1, wherein: in the step (S1.2), single-layer plate stacking or multi-layer plate stacking is adopted for stacking the deep plate materials.
3. The method of manufacturing an electric machine core according to claim 1, wherein: in the step (S1.3), the drawing is performed by conventional drawing, vibration energy field assisted drawing, magnetic field assisted drawing, or electric field assisted drawing.
4. The method of manufacturing an electric machine core according to claim 1, wherein: the deep drawing die comprises a male die, a blank holder and a female die; the blank holder is coaxially arranged above the female die; the male die is coaxially arranged in the axle centers of the blank holder and the female die; during drawing, the plate is arranged between the blank holder and the female die, the plate arranged between the female die and the blank holder generates plastic deformation under the action of the male die, and the plate is continuously pulled into a gap between the male die and the female die by the male die to form a drawn forming piece.
5. The method of manufacturing an electric machine core according to claim 1, wherein: the shaping die comprises a shaping compression ring, a shaping male die, a shaping female die and a base; the shaping female die is coaxially sleeved on the lower part of the shaping compression ring; the shaping male die is coaxially arranged in the axes of the shaping compression ring and the shaping female die; the base is arranged at the bottom end of the shaping female die; the deep drawing forming piece is arranged between the shaping female die and the bottom end of the shaping compression ring; under plastic clamping ring and plastic terrace die effect, the regional sheet material of fillet produces plastic deformation to along with the continuation of plastic clamping ring pushes down, the regional space of fillet is eliminated gradually and form the fillet and change into the plastic forming part of the approximate right angle of closely laminating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111348465.2A CN113996693B (en) | 2021-11-15 | 2021-11-15 | Method for preparing motor iron core |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111348465.2A CN113996693B (en) | 2021-11-15 | 2021-11-15 | Method for preparing motor iron core |
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| CN113996693A true CN113996693A (en) | 2022-02-01 |
| CN113996693B CN113996693B (en) | 2022-11-15 |
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| JP2017189076A (en) * | 2016-04-08 | 2017-10-12 | 株式会社デンソー | Manufacturing method for stator core of rotary electric machine |
| CN109201903A (en) * | 2018-09-27 | 2019-01-15 | 西安建筑科技大学 | A kind of heterogeneous plate without riveting Joining Technology |
| CN110293148A (en) * | 2019-06-21 | 2019-10-01 | 上海正玺新材料科技有限公司 | A kind of magnesium alloy plate punching press forging composite forming method |
| CN111729986A (en) * | 2020-05-20 | 2020-10-02 | 上海交通大学 | Two-point numerical control incremental forming and synchronous connection composite forming method for heterogeneous laminated plate |
-
2021
- 2021-11-15 CN CN202111348465.2A patent/CN113996693B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6276044B1 (en) * | 1997-06-09 | 2001-08-21 | Atd Corporation | Shaped multilayer metal foil shield structures and method of making |
| US20060001328A1 (en) * | 2003-12-30 | 2006-01-05 | Eberhard Rau | Method for production of a stator and stator produced according thereto |
| CN103035374A (en) * | 2011-10-05 | 2013-04-10 | 株式会社豊技研 | Laminated iron core and manufacturing method thereof |
| US20150256036A1 (en) * | 2014-03-10 | 2015-09-10 | Mitsui High-Tec , Inc. | Laminated iron core and manufacturing method for laminated iron core |
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| CN111729986A (en) * | 2020-05-20 | 2020-10-02 | 上海交通大学 | Two-point numerical control incremental forming and synchronous connection composite forming method for heterogeneous laminated plate |
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| CN113996693B (en) | 2022-11-15 |
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