CN114833359A - Processing method for reducing stray loss of rotor - Google Patents
Processing method for reducing stray loss of rotor Download PDFInfo
- Publication number
- CN114833359A CN114833359A CN202210451991.XA CN202210451991A CN114833359A CN 114833359 A CN114833359 A CN 114833359A CN 202210451991 A CN202210451991 A CN 202210451991A CN 114833359 A CN114833359 A CN 114833359A
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- turning
- rotor
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- 238000003672 processing method Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 61
- 229910052582 BN Inorganic materials 0.000 claims description 4
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 4
- 229910000997 High-speed steel Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910000976 Electrical steel Inorganic materials 0.000 abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 abstract description 15
- 238000004080 punching Methods 0.000 abstract description 9
- 238000003754 machining Methods 0.000 abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 241000555745 Sciuridae Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention provides a processing method for reducing stray loss of a rotor, and belongs to the technical field of machining. The processing method for reducing the stray loss of the rotor provided by the embodiment of the invention comprises the following steps: the outer circle surface of the rotor is turned by three procedures, different cutters are respectively used for turning in the three procedures, and the three procedures are rough turning, semi-finish turning and finish turning respectively. According to the processing method for reducing the stray loss of the rotor, provided by the embodiment of the invention, according to the characteristics of different hardness of aluminum and silicon steel and burr generation by turning, the punching sheet burr and the aluminum whisker burr generated by processing the outer circle of the motor rotor are reduced by adopting a proper processing method, so that the stray loss is reduced, and the performance of the motor is improved.
Description
Technical Field
The invention relates to the field of machining, in particular to a machining method for reducing stray loss of a rotor.
Background
According to the GB1032 standard, and the requirements of the current GB18613 standard, the motor efficiency is measured by measuring the stray losses, and therefore the control of the stray losses has a significant effect on the efficiency of the motor.
Before reaching the specified air gap of the motor, the outer circle of the rotor needs to be finely turned before the rotor is assembled. Because the hardness of the silicon steel sheet is different from that of the cast aluminum, aluminum whiskers are generated at the contact part of the silicon steel sheet and the cast aluminum in the turning process, and the gap ratio of the motor rotor can be influenced by embedding the aluminum whiskers into the silicon steel sheet. Simultaneously, add man-hour because the extrusion of lathe tool can cause towards the piece burr increase, it links to each other to dash the piece burr, leads to rotor surface to produce the phenomenon of "adhesion" because of the burr, and when the motor operation, "adhesion" on rotor surface can be because of the short circuit produces "vortex" between the silicon steel sheet punching, and the loss increases by a wide margin. These can adversely affect the magnetic field performance and performance of the motor.
The middle-size and small-size electric motor rotor generally adopts the open slot now, when the car rotor excircle, because of being aluminium squirrel cage strip notch part between the rotor notch, therefore the lathe tool interrupted cut during the turning, and wearing and tearing are very fast, can form adhesion between pawl, inversion and piece to probably produce aluminium bits, burr etc. on the rotor surface, can cause the iron loss of motor and the increase of stray loss like this when the motor operation from this, reduce motor efficiency.
Disclosure of Invention
The embodiment of the invention aims to provide a processing method for reducing the stray loss of a rotor, which is characterized in that according to the characteristics of different hardness of aluminum and silicon steel and burr generated by turning, the punching sheet burr and the aluminum whisker burr generated by processing the outer circle of a motor rotor are reduced by adopting a proper processing method, so that the stray loss is reduced, and the performance of the motor is improved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the embodiment of the invention provides a processing method for reducing stray loss of a rotor, which comprises the following steps: the outer circle surface of the rotor is turned by three procedures, different cutters are respectively used for turning in the three procedures, and the three procedures are rough turning, semi-finish turning and finish turning respectively.
In some embodiments, the outer circumferential surface of the rotor is subjected to three-step turning, and a positive and negative turning mode is adopted.
In some embodiments, in the three processes, the rough turning is performed by high-speed steel tool turning, the semi-finish turning is performed by cemented carbide tool turning, and the finish turning is performed by cubic boron nitride tool turning.
In some embodiments, in the rough turning procedure, the cutting speed Vc ≈ 150-200m/min, the feed amount f ≈ 0.15-0.25mm/R, and the radius R of the circular arc of the tool nose is 0.8; in the semi-finish turning procedure, the cutting speed Vc is approximately equal to 200-250m/min, the feeding amount f is approximately equal to 0.10-0.15mm/R, and the circular arc radius R of the tool nose is 0.4-0.6; in the fine turning procedure, the cutting speed Vc is approximately equal to 200-250m/min, the feed amount f is approximately equal to 0.05-0.10mm/R, and the circular arc radius R of the tool nose is 0.2-0.4.
In some embodiments, in the rough turning process, a low rotation speed and an increased feeding amount are adopted; in the semi-finish turning and finish turning procedures, high rotating speed and reduced feeding amount are adopted.
In some embodiments, in the rough turning process, the workpiece is machined to a size which is 0.25-0.30 mm different from the target size; in the semi-finish turning procedure, processing to a size which is 0.05-0.10mm different from the target size; in the finish turning process, the workpiece is machined to a target size.
In some embodiments, in the case of a small air gap between the stator and the rotor of the motor, two procedures are adopted: semi-finish turning and finish turning.
According to the characteristics of different hardness of aluminum and silicon steel and burr generated by turning, the punching sheet burr and the aluminum whisker burr generated by processing the outer circle of the motor rotor are reduced by adopting a proper processing method, so that the processing quality of the outer circle surface of the rotor is improved, the burr is reduced, and eddy current generated by turning adhesion between the punching sheets of the rotor is reduced, so that the stray loss is reduced, and the motor performance is improved.
Detailed Description
The technical solutions in some embodiments of the present disclosure will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided by the present disclosure belong to the protection scope of the present disclosure.
Throughout the specification and claims, the term "comprising" is to be interpreted in an open, inclusive sense, i.e., as "including, but not limited to," unless the context requires otherwise. In the description herein, the terms "one embodiment," "some embodiments," "an example embodiment," "an example" or "some examples" or the like are intended to indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the disclosure. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.
The embodiment of the invention provides a processing method for reducing stray loss of a rotor, which comprises the following steps: the outer circle surface of the rotor is turned by three procedures, different cutters are respectively adopted for the three procedures, and the three procedures are rough turning, semi-finish turning and finish turning respectively.
According to the processing method for reducing the stray loss of the rotor, provided by some embodiments of the invention, according to the characteristics of different hardness of aluminum and silicon steel and burr generation by turning, the punching sheet burr and the aluminum whisker burr generated by processing the outer circle of the rotor of the motor are reduced by adopting a proper processing method, so that the processing quality of the outer circle surface of the rotor is improved, the burr generation is reduced, and then the eddy current generated by turning adhesion between the punching sheets of the rotor is reduced, thereby reducing the stray loss and improving the performance of the motor.
In some embodiments, the outer circumferential surface of the rotor is subjected to three-step turning, and a positive and negative turning mode is adopted.
The positive and negative turning can also be called turning, and when the first turning process, namely the rough turning process, is carried out, burrs and aluminum chips of the silicon steel sheet on the surface of the outer circle of the rotor are in the same direction; when a second working procedure, namely a semi-finish turning working procedure, is turned, the direction of the rotor is changed, so that the direction of silicon steel burrs and the like is opposite to the direction of the silicon steel burrs and the like during processing in the first working procedure, burrs can be reduced, and adhesion caused by the burrs is reduced; when turning the third process, namely the finish turning process, the rotor direction is changed again, so that the generation and the influence of silicon steel burrs can be reduced to the greatest extent.
In some embodiments, in three processes, the rough turning is performed by high-speed steel tool turning, the semi-finish turning is performed by hard alloy tool turning, and the finish turning is performed by cubic boron nitride tool turning. The three cutters are more suitable for the hardness of silicon steel, and are beneficial to reducing burrs between silicon steel sheets during turning of the outer circle surface of the rotor.
The finish turning adopts a cubic boron nitride cutter, and the finish turning of the rotor surface by turning instead of grinding can be carried out by utilizing the characteristics of very strong wear resistance and cutting performance of the cutter.
Therefore, the burrs of the silicon steel stamped sheet on the surface of the outer circle of the rotor can be reduced, and the processing quality of the surface of the rotor is improved.
In some examples, in the rough turning process, the cutting speed Vc ≈ 150-; in the semi-finish turning procedure, the cutting speed Vc is approximately equal to 200-250m/min, the feed amount f is approximately equal to 0.10-0.15mm/R, and the circular arc radius R of the tool nose is 0.4-0.6; in the finish turning process, the cutting speed Vc is approximately 200-250m/min, the feed amount f is approximately 0.05-0.10mm/R, and the circular arc radius R of the tool nose is 0.2-0.4.
The processing of rotor belongs to semi-finishing, and the hardness of its material is softer, and the ductility is great, adopts above-mentioned processing parameter to process, can reduce the burr that lathe work produced, reduces the produced loss of silicon steel punching burr adhesion.
In practical application, the cutter adopts a small rake angle for machining the rotor, and the rake angle of 0-2 degrees can be usually adopted. The iron chips produced during cutting fall into the cutting groove, so that the influence on the turning is avoided.
In addition, the cutting fluid can be appropriately added and cooled during machining.
In some embodiments, in the rough turning process, a low rotation speed and an increased feeding amount are adopted; in the semi-finish turning and finish turning processes, high rotating speed is adopted, and the feeding amount is reduced.
In some embodiments, in the rough turning process, the workpiece is machined to a size which is 0.25-0.30 mm different from the target size; in the semi-finish turning procedure, processing to a size which is 0.05-0.10mm different from the target size; in the finish turning process, the workpiece is machined to a target size. Therefore, burrs can be reduced, the influence of the burrs caused by turning is reduced, and the machining quality of the rotor surface is improved.
In some embodiments, in the case of a small air gap between the stator and the rotor of the motor, two procedures are adopted: semi-finish turning and finish turning.
For a small-specification motor or an 6/8-pole motor, an air gap between a stator and a rotor is in a smaller specification, and two procedures of semi-finish turning and finish turning can be adopted according to actual dimensions to control the surface quality of the turned rotor and the size of burrs between rotor punching sheets and improve the surface processing quality of the rotor.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. A processing method for reducing stray loss of a rotor is characterized by comprising the following steps: the method comprises the following steps:
the outer circle surface of the rotor is turned by three procedures, different cutters are respectively used for turning in the three procedures, and the three procedures are rough turning, semi-finish turning and finish turning respectively.
2. The method of claim 1, wherein:
and (3) carrying out three-procedure turning on the surface of the outer circle of the rotor, and adopting a positive and negative turning mode.
3. The method of claim 1, wherein:
in the three procedures, the rough turning adopts high-speed steel tool turning, the semi-finish turning adopts hard alloy tool turning, and the finish turning adopts cubic boron nitride tool turning.
4. A method of reducing stray loss in a rotor according to claim 3, wherein:
in the rough turning procedure, the cutting speed Vc is approximately equal to 150-;
in the semi-finish turning procedure, the cutting speed Vc is approximately equal to 200-250m/min, the feeding amount f is approximately equal to 0.10-0.15mm/R, and the circular arc radius R of the tool nose is 0.4-0.6;
in the fine turning procedure, the cutting speed Vc is approximately equal to 200-250m/min, the feed amount f is approximately equal to 0.05-0.10mm/R, and the circular arc radius R of the tool nose is 0.2-0.4.
5. The method of claim 1, wherein:
in the rough turning process, the low rotating speed and the increased feeding amount are adopted;
in the semi-finish turning and finish turning procedures, high rotating speed and reduced feeding amount are adopted.
6. The method of claim 1, wherein:
in the rough turning procedure, processing to a size which is different from the target size by 0.25-0.30 mm;
in the semi-finish turning procedure, processing to a size which is 0.05-0.10mm different from the target size;
in the finish turning process, the workpiece is machined to a target size.
7. The method of claim 1, wherein:
under the condition that an air gap between a stator and a rotor of the motor is small, two working procedures are adopted: semi-finish turning and finish turning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210451991.XA CN114833359A (en) | 2022-04-26 | 2022-04-26 | Processing method for reducing stray loss of rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210451991.XA CN114833359A (en) | 2022-04-26 | 2022-04-26 | Processing method for reducing stray loss of rotor |
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| Publication Number | Publication Date |
|---|---|
| CN114833359A true CN114833359A (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210451991.XA Pending CN114833359A (en) | 2022-04-26 | 2022-04-26 | Processing method for reducing stray loss of rotor |
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| Country | Link |
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| CN (1) | CN114833359A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101574743A (en) * | 2008-05-06 | 2009-11-11 | 上海重型机器厂有限公司 | Machine tool and method for machining over-long diameter ratio shaft exceeding machine tool standard |
| CN101954492A (en) * | 2010-10-26 | 2011-01-26 | 南阳防爆集团股份有限公司 | Processing technology for excircle of high-efficiency motor rotor |
| CN102091937A (en) * | 2009-12-15 | 2011-06-15 | 上海重型机器厂有限公司 | Machining method of thermal power rotors |
| CN104690298A (en) * | 2015-02-13 | 2015-06-10 | 中钢集团邢台机械轧辊有限公司 | Turning method for high-speed steel roller |
| CN109175925A (en) * | 2018-10-23 | 2019-01-11 | 南京创力传动科技有限公司 | The technique manufacturing method of integral type high speed rotor shafts |
| US20190262905A1 (en) * | 2018-02-24 | 2019-08-29 | Citic Dicastal Co., Ltd | Wheel machining tool |
-
2022
- 2022-04-26 CN CN202210451991.XA patent/CN114833359A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101574743A (en) * | 2008-05-06 | 2009-11-11 | 上海重型机器厂有限公司 | Machine tool and method for machining over-long diameter ratio shaft exceeding machine tool standard |
| CN102091937A (en) * | 2009-12-15 | 2011-06-15 | 上海重型机器厂有限公司 | Machining method of thermal power rotors |
| CN101954492A (en) * | 2010-10-26 | 2011-01-26 | 南阳防爆集团股份有限公司 | Processing technology for excircle of high-efficiency motor rotor |
| CN104690298A (en) * | 2015-02-13 | 2015-06-10 | 中钢集团邢台机械轧辊有限公司 | Turning method for high-speed steel roller |
| US20190262905A1 (en) * | 2018-02-24 | 2019-08-29 | Citic Dicastal Co., Ltd | Wheel machining tool |
| CN109175925A (en) * | 2018-10-23 | 2019-01-11 | 南京创力传动科技有限公司 | The technique manufacturing method of integral type high speed rotor shafts |
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