CN114123683A - Method for manufacturing permanent magnet synchronous motor rotor - Google Patents
Method for manufacturing permanent magnet synchronous motor rotor Download PDFInfo
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- CN114123683A CN114123683A CN202111339181.7A CN202111339181A CN114123683A CN 114123683 A CN114123683 A CN 114123683A CN 202111339181 A CN202111339181 A CN 202111339181A CN 114123683 A CN114123683 A CN 114123683A
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- sample rod
- iron core
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000004080 punching Methods 0.000 claims abstract description 132
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000003825 pressing Methods 0.000 claims abstract description 36
- 238000010030 laminating Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 abstract description 5
- 238000003475 lamination Methods 0.000 description 10
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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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
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
Abstract
The permanent magnet synchronous motor rotor manufacturing method is characterized in that firstly, punching sheets are used for laminating and press-mounting to form an iron core, and then a rotating shaft is installed on the iron core in a hot-sleeving mode, wherein the method comprises the following steps: the flexible groove sample rod is adopted to guide and position the punching sheet in the laminating process, and the flexible groove sample rod is synchronously compressed along with the pressing of the punching sheet in the press-fitting process. The invention can avoid the quality problems of scattered sheets and dislocation of the top part in the pressing process of the punching sheet, the flexible groove sample rod is synchronously compressed along with the pressing of the punching sheet in the pressing process, thereby not only effectively avoiding the circumferential rotation of the punching sheet in the pressing process, but also preventing the flexible groove sample rod from being pressed and bent to form transverse interference on the punching sheet in the pressing process of the punching sheet, being not interfered by the flexible groove sample rod in the pressing process of the punching sheet, avoiding dislocation and deformation, ensuring that the ventilation hole of the iron core is not bent along the axial arrangement, improving the quality of the iron core and prolonging the service life of the iron core.
Description
Technical Field
The invention relates to a method for manufacturing a permanent magnet synchronous motor rotor, and belongs to the technical field of motor rotor manufacturing.
Background
The permanent magnet synchronous motor and the asynchronous motor are structurally characterized in that the inside of a rotor core is totally closed, two ends of a punching sheet magnetic steel groove are closed after being assembled, the rotor core is firstly laminated by a punching sheet and then is compressed to a specific size by an oil press, so that the length of a groove sample rod placed for positioning the punching sheet magnetic steel groove is limited inevitably in the lamination process of the punching sheet, if the length of the groove sample rod is greater than the specific size of the rotor core after the pressing, the groove sample rod can be bent in a suppressed mode when the rotor core is compressed, and the phenomenon that the rotor core magnetic steel groove is deformed in a suppressed mode can be generated. If the length of the groove-shaped rod is smaller than the specific size of the iron core after the pressing, the quality problems of sheet scattering and dislocation are easy to occur on the rotor punching sheet close to the end D. The scattered sheets cause the loss of the motor iron and the increase of no-load current, the dislocation of the rotor punching sheets causes the interference of the ventilation openings, the temperature rise of the rotor is increased, and the influence on the magnetism of the magnetic steel is large.
Disclosure of Invention
The method for manufacturing the permanent magnet synchronous motor rotor provided by the invention avoids the quality problems of scattered sheets and dislocation at the top part in the punching press mounting process, the flexible groove sample rod is synchronously compressed along with the pressing of the punching sheet in the pressing mounting process, the circumferential rotation of the punching sheet in the pressing mounting process can be effectively avoided, the transverse interference of the pressing bending of the flexible groove sample rod to the punching sheet in the punching press mounting process can be prevented, the interference of the flexible groove sample rod in the punching press mounting process is avoided, the dislocation and the deformation can not occur, the air vent of the iron core is ensured not to be bent along the axial direction, the quality of the iron core is improved, and the service life of the iron core is prolonged.
In order to achieve the purpose, the invention adopts the technical scheme that:
the permanent magnet synchronous motor rotor manufacturing method is characterized in that firstly, punching sheets are used for laminating and press-mounting to form an iron core, and then a rotating shaft is installed on the iron core in a hot-sleeving mode, wherein the method comprises the following steps: the flexible groove sample rod is adopted to guide and position the punching sheet in the laminating process, and the flexible groove sample rod is synchronously compressed along with the pressing of the punching sheet in the press-fitting process.
Preferably, the punching sheets are laminated on the lower die base with the longitudinal section in a convex shape, the diameter of a middle boss of the lower die base is equal to that of the punching sheet, a positioning groove corresponding to a magnetic steel assembling groove on the punching sheet is formed in the middle boss, the flexible groove sample rod is inserted into the positioning groove along the vertical direction, the punching sheets are sequentially laminated on the middle boss under the guiding of the flexible groove sample rod, and the top end of the flexible groove sample rod penetrates out of the punching sheet on the uppermost layer.
Preferably, a center hole is formed in the center of the lower die base, a dummy shaft matched with the center of the punching sheet in a guiding mode is inserted into the center hole, the dummy shaft and the flexible groove sample bar guide the punching sheet together, the punching sheet is radially positioned through the dummy shaft, and the punching sheet is circumferentially positioned through the flexible groove sample bar.
Preferably, the number of the flexible groove sample rods is four, the flexible groove sample rods are evenly distributed along the circumferential direction of the middle boss, and the number of each group of flexible groove sample rods is two, and the two flexible groove sample rods are distributed in a V shape corresponding to the magnetic steel assembling grooves on the punching sheet on the middle boss.
Preferably, the bottom of the flexible groove sample rod is of a telescopic elastic structure, the flexible groove sample rod extends into the positioning groove, the bottom of the flexible groove sample rod is abutted to the bottom wall of the positioning groove, and after the punching sheets are stacked in place, the stacked and orderly punching sheets are pressed and pressed by an oil press to synchronously compress the flexible groove sample rod.
Preferably, flexible groove appearance stick comprises groove appearance stick body and spring, and the spring is fixed with groove appearance stick body bottom, and the spring offsets with the constant head tank diapire, and the spring still has the compression allowance when pressing into the iron core towards the piece pressure equipment.
Preferably, the degree of depth of constant head tank is greater than the length that the spring stretches out from groove appearance stick body bottom, and groove appearance stick body clearance fit stretches into in the constant head tank.
Preferably, the bottom of the groove sample rod body is provided with at least two mounting grooves for mounting the spring, and one end of the spring is pressed into the mounting grooves, so that the spring is fixed at the bottom of the groove sample rod body.
Preferably, "the rotating shaft is installed on the iron core by means of shrink fit" means that the lower die holder and the iron core are hoisted into a heating furnace and heated and kept warm to expand the central hole of the iron core, then the lower die holder and the iron core are hoisted out of the heating furnace while the lower die holder and the iron core are hot and placed on an oil press, a pressing ring is covered on the iron core, the rotating shaft is pressed down by the oil press, the rotating shaft is inserted into the central hole of the iron core to enable a shaft shoulder of the rotating shaft to abut against the pressing ring, and the oil press is kept pressure until the iron core and the lower die holder are completely cooled.
Preferably, after the core and the lower die holder are completely cooled, the pressing ring is removed by removing the pressure, and the flexible slot-like bar is pulled out upward from the top of the core.
The invention has the beneficial effects that:
1. the invention relates to a method for preparing a permanent magnet synchronous motor rotor, which uses a flexible groove sample rod for guiding and positioning in the lamination process of punching sheets, because the flexible groove sample rod can stretch, the flexible telescopic rod is not stressed in the lamination process, the length of the flexible groove sample rod extending out of a lower die holder is larger than the total height of lamination of the punching sheets, the punching sheets laminated to the top can also form guiding and positioning matching with the flexible groove sample rod, the magnetic steel assembling grooves of the punching sheets in the lamination process are ensured to be accurately aligned, the quality problems of top part scattering and dislocation in the punching sheet press-fitting process are avoided, the flexible groove sample rod is synchronously compressed along with the pressing of the punching sheets in the press-fitting process, the circumferential rotation of the punching sheets in the press-fitting process can be effectively avoided, the flexible groove sample rod is prevented from being pressed and bent to form transverse interference in the punching sheet press-fitting process, and the interference of the flexible groove sample rod is avoided in the punching sheet press-fitting process, dislocation and deformation can not occur, the ventilation holes of the iron core are ensured not to be bent along the axial direction, the quality of the iron core is improved, and the service life of the iron core is prolonged.
2. The flexible groove sample rod comprises a groove sample rod body and a spring, the spring is fixed at the bottom of the groove sample rod body, the spring and the groove sample rod body extend into the positioning groove, the groove sample rod body is in clearance fit with the positioning groove, the inclination of the flexible groove sample rod can be effectively avoided, the guiding reliability during lamination is improved, the spring is compressed when the flexible groove sample rod is pressed by a punching sheet, the groove sample rod body synchronously moves downwards along with the pressing of the punching sheet and cannot deform, the spring still has a compression allowance when the punching sheet is pressed in place to form an iron core, the spring cannot generate permanent deformation, after the installation of the rotating shaft is completed, the spring extends to enable the groove sample rod body to extend out of the top of the iron core, the taking is convenient, the flexible groove sample rod is simple and convenient to disassemble, and the practicability is strong.
3. When the punching sheet is laminated, the punching sheet is guided and positioned together by the dummy shaft and the flexible groove sample rod, the dummy shaft is used for radially positioning the punching sheet, the laminating regularity is ensured, the flexible groove sample rod is used for circumferentially positioning the punching sheet, the punching sheet can be ensured to be aligned to the magnetic steel assembling groove and can not circumferentially rotate in the pressing process, and the dislocation of the magnetic steel assembling groove on the punching sheet is avoided, so that the regularity of the air holes of the iron core is influenced.
Drawings
Fig. 1 is a schematic view of a punching sheet laminated on a lower die base.
Fig. 2 is a schematic view when the rotating shaft is inserted into the iron core and pressed by the pressing ring in the shaft shoulder of the rotating shaft.
FIG. 3 is a schematic view of the lower die holder.
FIG. 4 is a schematic view of a flexible channel-like rod.
FIG. 5 is a schematic view of a channel bar body.
Fig. 6 is a schematic diagram of the distribution of flexible channel-like bars on the middle boss.
Detailed Description
Embodiments of the present invention will be described in detail with reference to fig. 1 to 6.
The permanent magnet synchronous motor rotor manufacturing method comprises the steps of firstly using punching sheets to be laminated and pressed to form an iron core 1, then installing a rotating shaft 2 on the iron core 1 in a hot sleeve mode, and is characterized in that: the punching sheet is guided and positioned by the aid of the telescopic flexible groove sample rods 3 in the laminating process, and the flexible groove sample rods 3 are synchronously compressed along with the punching sheet under pressure in the press-fitting process.
The method for manufacturing the permanent magnet synchronous motor rotor comprises the steps of using the flexible groove sample rod 3 for guiding and positioning in the lamination process of the punching sheet, ensuring that the magnetic steel assembly grooves of the punching sheet in the lamination process are accurately aligned due to the fact that the flexible groove sample rod 3 is telescopic, the length of the flexible groove sample rod extending out of the lower die base is larger than the total height of lamination of the punching sheet, leading the punching sheet laminated to the top to be matched with the flexible groove sample rod 3 in a guiding and positioning mode, avoiding the quality problems of top part scattering and dislocation in the punching sheet press-fitting process, leading the flexible groove sample rod 3 to be synchronously compressed along with the pressing of the punching sheet in the press-fitting process, not only effectively avoiding circumferential rotation of the punching sheet in the press-fitting process, but also preventing the flexible groove sample rod 3 from being pressed and bent in the press-fitting process to form transverse interference to the punching sheet, and avoiding interference of the flexible groove sample rod 3 in the press-fitting process, dislocation and deformation can not occur, the ventilation holes of the iron core 1 are ensured not to be bent along the axial direction, the quality of the iron core is improved, and the service life of the iron core is prolonged.
The punching sheets are laminated on the lower die base 4 with the longitudinal section in the shape of a Chinese character 'tu', the diameter of a middle boss 41 of the lower die base 4 is equal to that of the punching sheet, a positioning groove 42 corresponding to a magnetic steel assembly groove on the punching sheet is formed in the middle boss 41, the flexible groove sample rod 3 is vertically inserted into the positioning groove 42, the punching sheets are sequentially laminated on the middle boss under the guide of the flexible groove sample rod, and the top end of the flexible groove sample rod 3 penetrates out of the punching sheet on the uppermost layer. Flexible groove appearance stick 3 inserts on middle boss 41, the magnet steel assembly groove of punching the piece aligns with flexible groove appearance stick 3, cooperate with 3 direction of flexible groove appearance stick, from supreme stack in proper order down on middle boss 41, the direction through flexible groove appearance stick 3 makes the punching the piece align in proper order and fold the pressure, each magnet steel assembly groove on the punching piece aligns in proper order, because flexible groove appearance stick 3 is scalable, so the length that flexible groove appearance stick 3 stretches out middle boss 41 is greater than the stack thickness of punching the piece, make follow supreme punching the piece each time down and can both fold the pressure under the direction of flexible groove appearance stick 3, fold neat higher of pressing, the magnet steel assembly groove that can effectively avoid folding staggers.
The center of the lower die holder 4 is provided with a center hole, a dummy shaft 43 which is matched with the center of the punching sheet in a guiding manner is inserted into the center hole, the dummy shaft 43 and the flexible groove sample rod 3 guide the punching sheet together, the punching sheet is radially positioned through the dummy shaft 43, and the punching sheet is circumferentially positioned through the flexible groove sample rod 3. Dummy shaft 43 and towards piece clearance fit, carry out radial positioning to the punching sheet when the punching sheet is folded, guarantee to fold the punching sheet that presses well and can not by radial movement, and flexible groove appearance stick 3 carries out circumference location to the punching sheet, prevent to push the piece rotation, guarantee that the magnet steel assembly groove of each punching sheet aligns in proper order, through dummy shaft 43 and the combination direction of flexible groove appearance stick 3, it is better to make the regularity of folding press, it aligns each towards the piece to change when folding, fold and accomplish the back, take out dummy shaft 43, press fitting is carried out to the punching sheet again. When the punching sheet is laminated, the punching sheet is guided and positioned together by the dummy shaft 43 and the flexible groove sample rod 3, the punching sheet is radially positioned by the dummy shaft 43, the laminating regularity is ensured, the flexible groove sample rod circumferentially positions the punching sheet, the punching sheet can not circumferentially rotate in the alignment and press-fitting process of the punching sheet magnetic steel assembling groove, and the dislocation of the magnetic steel assembling groove on the punching sheet is avoided, so that the regularity of the iron core vent hole is influenced.
The number of the flexible groove sample rods 3 is four, the flexible groove sample rods are evenly distributed along the circumferential direction of the middle boss 41, and the number of each group of flexible groove sample rods 3 is two, and the two flexible groove sample rods 3 are distributed on the middle boss in a V shape corresponding to the magnetic steel assembling grooves on the punching sheet. The quantity of the flexible groove sample rods 3 is determined according to the quantity of magnetic steel assembling grooves on the stamped steel, namely 8 flexible groove sample rods are inserted into the middle boss 41, every two flexible groove sample rods are in a group, the two flexible groove sample rods 3 in each group are distributed in a V shape, the stamped steel is laminated on the middle boss 42 under the guidance of the 8 flexible groove sample rods 3 and the dummy shaft 43, the regularity is ensured, and therefore the laminating reliability is high.
Wherein, the flexible groove appearance stick 3 bottom is telescopic elastic construction, stretches into flexible groove appearance stick 3 to in the constant head tank 42 and the bottom supports on constant head tank 42 diapire, and after the punching sheet closed assembly put in place, the hydraulic press is to fold and press the orderly punching sheet and carry out the pressure equipment, makes the synchronous compression of flexible groove appearance stick 3. The bottom of the flexible groove sample rod 3 is compressed after being pressed, the top of the flexible groove sample rod 3 can move downwards synchronously with the punching sheet and keep fit with the punching sheet, and the circumferential rotation of the punching sheet is limited, so that the punching sheets can not be staggered in the press fitting process, the alignment can be protected in sequence, and the pore diameter of the vent hole of the iron core is ensured to be consistent along the axial direction.
The flexible groove sample rod 3 is composed of a groove sample rod body 31 and a spring 32, the spring 32 is fixed to the bottom of the groove sample rod body 31, the spring 32 abuts against the bottom wall of the positioning groove 42, and the spring is provided with a compression allowance when the punching sheet is pressed into an iron core. The depth of the positioning groove 42 is larger than the length of the spring 32 extending from the bottom of the groove sample rod body 31, and the groove sample rod body 31 extends into the positioning groove 42 in a clearance fit manner. It can be seen from the drawings that the spring 32 contacts with the bottom wall of the positioning groove 42, the groove sample rod body 31 extends into the positioning groove 42, so that the groove sample rod body 42 does not incline, the guiding reliability is high, when the punching sheet is pressed and assembled, the groove sample rod body 31 contacts with the top of the groove sample rod body 31 first, the spring 32 presses downwards, the groove sample rod body 31 moves downwards to be flush with the punching sheet on the uppermost layer, the punching sheet is pressed at the moment, the spring 32 is compressed continuously, the groove sample rod body 31 moves downwards along with the pressing sheet and keeps fit with the punching sheet all the time, the circumferential rotation of the punching sheet is limited, the magnetic steel assembling grooves of each punching sheet keep alignment, when the punching sheet is pressed and assembled in place, the spring 32 has a compression margin and is not completely compressed, the spring 32 cannot be crushed in the punching sheet pressing and assembling process, the flexible groove sample rod 3 cannot bend in the pressing process due to the compression of the spring 32, and the problem that the groove sample rod is easily bent in the pressing process of the punching sheet in the prior art and interferes with the punching sheet so that the formed iron core is deformed and deformed is solved The flexible groove sample rod 3 guides the punching sheet in the lamination process of the punching sheet, limits the circumferential rotation of the punching sheet in the press fitting process, avoids interference between the punching sheet and the flexible groove sample rod through compression, improves the quality of the iron core, and ensures the aperture consistency of the ventilation holes of the iron core.
At least two mounting grooves 311 for mounting springs are formed in the bottom of the groove sample rod body 31, and one end of the spring 32 is pressed into the mounting grooves, so that the spring 32 is fixed to the bottom of the groove sample rod body 31. A plurality of springs 32 are installed at the bottom of the groove sample rod body 31, and the plurality of springs 32 are synchronously compressed, so that the reliability of the flexible groove sample rod 3 is improved.
The 'installing the rotating shaft on the iron core by means of shrink fit' means that the lower die holder 4 and the iron core 1 are firstly hoisted into a heating furnace to be heated and insulated to expand a central hole of the iron core, then the lower die holder 4 and the iron core 1 are hoisted out of the heating furnace while the lower die holder and the iron core 1 are hot, the heating furnace is placed on an oil press, a pressing ring 5 covers the iron core, the rotating shaft is pressed down by the oil press, the rotating shaft 2 is inserted into the central hole of the iron core 1 to enable a shaft shoulder of the rotating shaft to be abutted against the pressing ring 5, and the oil press maintains the pressure until the iron core and the lower die holder are completely cooled. Since the spring 32 has a compression margin after the press-fitting of the core, even when the pressure is maintained after the insertion of the rotary shaft 2, the slight pressing of the core 1 further compresses the spring 32 and does not deform the groove pattern bar body 31.
And after the iron core 1 and the lower die holder 4 are completely cooled, removing the pressure, taking down the pressing ring 5, and upwards extracting the flexible groove sample rod 3 from the top of the iron core 1. Because the spring 32 still has the compression allowance when the punching sheet is pressed in place to form the iron core 1, the spring 32 can not generate permanent deformation damage, after the installation of the rotating shaft 2 is completed, the spring 32 can be restored to extend to enable the groove sample rod body to extend out of the top of the iron core, the groove sample rod body is convenient to take out, the flexible groove sample rod 3 is simple and convenient to disassemble and assemble, and the practicability is high.
The technical solutions of the embodiments of the present invention are fully described above with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Claims (10)
1. The permanent magnet synchronous motor rotor manufacturing method is characterized in that firstly, punching sheets are used for laminating and press-mounting to form an iron core, and then a rotating shaft is installed on the iron core in a hot-sleeving mode, wherein the method comprises the following steps: the flexible groove sample rod is adopted to guide and position the punching sheet in the laminating process, and the flexible groove sample rod is synchronously compressed along with the pressing of the punching sheet in the press-fitting process.
2. The method for preparing the rotor of the permanent magnet synchronous motor according to claim 1, characterized in that: the punching sheet is laminated on the lower die holder with the convex-shaped longitudinal section, the diameter of the middle boss of the lower die holder is equal to that of the punching sheet, the positioning groove corresponding to the magnetic steel assembling groove on the punching sheet is formed in the middle boss, the flexible groove sample rod is vertically inserted into the positioning groove, the punching sheet is sequentially laminated on the middle boss under the guide of the flexible groove sample rod, and the top end of the flexible groove sample rod penetrates out of the punching sheet on the uppermost layer.
3. The method for preparing the rotor of the permanent magnet synchronous motor according to claim 2, characterized in that: a central hole is formed in the center of the lower die base, a dummy shaft matched with the center of the punching sheet in a guiding mode is inserted into the central hole, the dummy shaft and the flexible groove sample bar guide the punching sheet together, the punching sheet is radially positioned through the dummy shaft, and the punching sheet is circumferentially positioned through the flexible groove sample bar.
4. The method for preparing the rotor of the permanent magnet synchronous motor according to claim 3, characterized in that: the quantity of flexible groove appearance stick is four groups, along middle boss circumference evenly distributed, and the quantity of every group flexible groove appearance stick is two and two flexible groove appearance sticks and is the V style of calligraphy distribution that corresponds with the magnet steel assembly groove on the punching sheet on the boss in the middle.
5. The method for preparing the rotor of the permanent magnet synchronous motor according to claim 2, characterized in that: the bottom of the flexible groove sample rod is of a telescopic elastic structure, the flexible groove sample rod extends into the positioning groove, the bottom of the flexible groove sample rod is abutted to the bottom wall of the positioning groove, and after the punching sheets are stacked in place, the stacked and orderly punching sheets are pressed by an oil press to enable the flexible groove sample rod to be compressed synchronously.
6. The method for preparing the rotor of the permanent magnet synchronous motor according to claim 5, characterized in that: the flexible groove sample rod is composed of a groove sample rod body and a spring, the spring is fixed to the bottom of the groove sample rod body, the spring abuts against the bottom wall of the positioning groove, and the spring is provided with a compression allowance when the iron core is pressed and formed by punching sheets.
7. The method for preparing the rotor of the permanent magnet synchronous motor according to claim 6, characterized in that: the degree of depth of constant head tank is greater than the length that the spring stretches out from groove appearance stick body bottom, and groove appearance stick body clearance fit stretches into in the constant head tank.
8. The method for preparing the rotor of the permanent magnet synchronous motor according to claim 4, characterized in that: and at least two mounting grooves for mounting the spring are formed in the bottom of the groove sample rod body, and one end of the spring is pressed into the mounting grooves, so that the spring is fixed at the bottom of the groove sample rod body.
9. The method for preparing the rotor of the permanent magnet synchronous motor according to claim 2, characterized in that: the 'installing the rotating shaft on the iron core by means of shrink fit' means that the lower die holder and the iron core are hoisted into a heating furnace to be heated and insulated to expand a central hole of the iron core, then the lower die holder and the iron core are hoisted out of the heating furnace while the lower die holder and the iron core are hot and placed on an oil press, a pressing ring is covered on the iron core, the rotating shaft is pressed down by the oil press, the rotating shaft is inserted into the central hole of the iron core to enable a shaft shoulder of the rotating shaft to be abutted against the pressing ring, and the oil press maintains the pressure until the iron core and the lower die holder are completely cooled.
10. The method for preparing the rotor of the permanent magnet synchronous motor according to claim 6, characterized in that: and after the iron core and the lower die holder are completely cooled, removing the pressure, taking down the pressing ring, and upwards drawing out the flexible groove sample rod from the top of the iron core.
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| CN202111339181.7A CN114123683A (en) | 2021-11-12 | 2021-11-12 | Method for manufacturing permanent magnet synchronous motor rotor |
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| CN209571924U (en) * | 2019-05-08 | 2019-11-01 | 新界泵业（江苏）有限公司 | Based on the invariable tooling of rotor chute value |
| CN210908842U (en) * | 2019-11-08 | 2020-07-03 | 四川丹齿精工科技有限公司 | Press fitting device for inner hole copper bush of reverse gear idler |
| CN212163103U (en) * | 2020-07-08 | 2020-12-15 | 青岛晟润泰电气制造有限公司 | Motor stator goes into shell mechanism |
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Application publication date: 20220301 |