CN112491219B - Rotor core lamination die and lamination method - Google Patents
Rotor core lamination die and lamination method Download PDFInfo
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- CN112491219B CN112491219B CN202011302837.3A CN202011302837A CN112491219B CN 112491219 B CN112491219 B CN 112491219B CN 202011302837 A CN202011302837 A CN 202011302837A CN 112491219 B CN112491219 B CN 112491219B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/021—Magnetic cores
- H02K15/026—Wound cores
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Abstract
本发明公开了一种转子铁芯叠压模具，包括底座、数个等高块，三棱芯柱、固定内模、两块活动内模和两个活动内模横移机构，固定内模和两块活动内模分别通过数个间隔设置的紧固螺钉固定在三棱芯柱对应侧面的纵向中心；活动内模横移机构分别设置在三棱芯柱顶端和相邻的活动内模顶端上，以及活动内模与相邻的三棱芯柱侧面之间。叠压转子铁芯时，上下叠压的转子铁芯内孔与固定内模外缘和两块活动内模外缘彼此抵靠。本发明的叠压方法包括1）组装转子铁芯叠压模具，2）叠压转子铁芯，3）上拉活动内模，完成转子铁芯脱模。本发明使得转子铁芯脱模方便，显著提高了转子铁芯的叠压工效和叠压质量。
The present invention discloses a rotor core lamination die, comprising a base, several equal-height blocks, a triangular core column, a fixed inner mold, two movable inner molds and two movable inner mold transverse movement mechanisms, wherein the fixed inner mold and the two movable inner molds are respectively fixed to the longitudinal center of the corresponding side surfaces of the triangular core column by several spaced-apart fastening screws; the movable inner mold transverse movement mechanisms are respectively arranged on the top of the triangular core column and the top of the adjacent movable inner mold, and between the movable inner mold and the adjacent side surfaces of the triangular core column. When laminating the rotor core, the inner holes of the upper and lower laminating rotor cores abut against the outer edges of the fixed inner mold and the two movable inner molds. The lamination method of the present invention comprises 1) assembling the rotor core lamination die, 2) laminating the rotor core, and 3) pulling up the movable inner mold to complete the demoulding of the rotor core. The present invention facilitates the demoulding of the rotor core and significantly improves the lamination efficiency and lamination quality of the rotor core.
Description
Technical Field
The invention relates to a lamination die of a motor rotor, in particular to a lamination die and a lamination method for positioning an inner hole of a rotor core, and belongs to the technical field of motor manufacturing.
Background
The positioning mode of the motor iron core (stator iron core and rotor iron core) laminating die can be divided into two modes of inner hole positioning and iron core outer circle positioning, and the rotor iron core is laminated in an inner hole positioning mode in most cases, and the accuracy requirement of an inner hole after lamination of the rotor iron core can be ensured in the mode. In order to ensure the precision requirement of the inner hole of the rotor core, the fit clearance between the inner core of the lamination die with the fixed structure and the inner hole of the core punching sheet is smaller, so that the inner hole of the core is difficult to demould after lamination of the rotor core. If an elastic demoulding mechanism is arranged in the laminating mould, the inner hole of the rotor iron core can be damaged by forced demoulding through elastic force, and the manufacturing quality of the motor iron core is seriously affected.
Disclosure of Invention
The invention aims to provide a rotor core lamination die and a lamination method, which can improve lamination quality of a rotor core.
The invention is realized by the following technical scheme:
A rotor core lamination die comprises a base, a plurality of equal-height blocks, a triangular prism, a fixed inner die, two movable inner dies and two movable inner die traversing mechanisms, wherein the equal-height blocks are circumferentially arranged along the base and are respectively fixed on the outer edges of the upper side surfaces of the base, the lower ends of positioning rods are respectively fixed on the equal-height blocks, the triangular prism is vertically fixed at the center of the base, the fixed inner die and the two movable inner dies are respectively fixed at the longitudinal centers of the corresponding side surfaces of the triangular prism through a plurality of fastening screws arranged at intervals, the movable inner die traversing mechanisms are respectively arranged on the top ends of the triangular prism and the adjacent top ends of the movable inner dies and between the movable inner dies and the adjacent side surfaces of the triangular prism, and when the rotor core is laminated, inner holes of the rotor core, the outer edges of the fixed inner dies and the two movable inner dies are mutually abutted.
The object of the present invention can be further achieved by the following technical means.
Further, the shapes of the fixed inner die and the two movable inner dies are combined bodies of an arch body and a cuboid, and the outer arc surface of the arch body faces the inner hole of the rotor core and is matched with the inner hole of the rotor core.
Further, one end of each of the plurality of positioning pins is inserted into and fixed on the two longitudinal sides of the fixed inner die or the two longitudinal sides of the movable inner die on the corresponding side surface of the triangular core column at intervals.
Further, the movable internal mold traversing mechanism comprises a right-angle support and a coupling structure, the coupling structure is arranged between the movable internal mold and the corresponding side surface of the triangular prism, the lower ends of the vertical parts of the right-angle support are respectively fixed on the top end of the movable internal mold, and the lifting screws respectively penetrate through the horizontal parts of the right-angle support and are screwed into the top end of the movable internal mold.
The coupling structure comprises a movable inner die upper step, a movable inner die middle step and a movable inner die lower step which are gradually retracted at one side of the movable inner die and gradually increased in length, and three-level steps which are gradually outwards protruded and gradually reduced in length and are respectively arranged on the side face of a triangular prism adjacent to the movable inner die, the three-level steps in the triangular prism and the three-level steps in the triangular prism, two adjacent step faces are intersected by an oblique angle alpha, the three-level steps in the movable inner die and the three-level steps in the triangular prism are mutually inverted, and in the lamination process of a rotor core punching sheet, the upper step in the movable inner die, the upper step end of the triangular prism, the lower end of the step in the movable inner die, the upper step of the triangular prism, the lower step in the triangular prism, the lower step of the movable inner die and the lower step of the triangular prism are respectively abutted against each other, and a step face A is respectively arranged between the lower step in the movable inner die and the upper step in the triangular prism. The step surface gap A=1.5-2.5 mm.
Further, the top end of the upper step of the triangular prism adjacent to the movable internal mold and the bottom end of the lower step of the movable internal mold are respectively provided with an end oblique angle alpha 1, and the end oblique angle alpha 1 is matched with the oblique angle alpha between two adjacent step surfaces. The bevel angle alpha or the end bevel angle alpha 1 is 28-32 degrees.
A laminating method of a rotor core laminating die comprises the following steps:
1) The method comprises the steps of fixing a fixed inner die and two movable inner dies on the longitudinal center of the side face of a triangular core column through fastening screws, respectively installing positioning pins at intervals on two sides of the fixed inner die and two sides of the two movable inner dies, and positioning the fixed inner die and two movable inner dies on the two lateral sides of the triangular core column;
then positioning and fixing a lower spigot at the bottom center of the triangular prism in a central counter bore of the base, fixing the lower end of a positioning rod on the equal-height block, and then arranging a combination of the positioning rod and the equal-height block along the circumferential direction of the base to be respectively fixed on the outer edge of the upper side surface of the base;
finally, the lower ends of the vertical parts of the right-angle supports are respectively fixed at the top ends of the movable internal molds, lifting screws respectively penetrate through the horizontal parts of the right-angle supports downwards and are screwed into the corresponding top ends of the movable internal molds, and the assembly of the rotor core lamination mold is completed;
2) The method comprises the steps of sleeving rotor core punching sheets on the outer edges of a fixed inner die and the outer edges of two movable inner dies one by one, enabling the outer edges of the fixed inner die and the outer edges of the two movable inner dies to respectively lean against corresponding positions of inner holes of the rotor core punching sheets, arranging rotor core groove shapes through positioning rods in the lamination process of the rotor core punching sheets, dismantling fastening screws at the positions when the lamination height of the rotor core punching sheets reaches the positions of the fastening screws for fixedly connecting the movable inner dies and the triangular prism in the lamination height ascending process of the rotor core punching sheets, and dismantling all the fastening screws for fixedly connecting the movable inner dies and the triangular prism when lamination of the rotor core punching sheets is completed;
3) The lifting screws are respectively screwed by using a spanner, the lifting screws pull the corresponding movable inner die to move upwards, the upper step of the movable inner die moves upwards to slide through the end bevel angle alpha 1 of the upper step of the triangular core column and then move towards the triangular core column, the gap A of the step surface is eliminated, the middle step of the movable inner die abuts against the upper step of the triangular core column, the lower step of the movable inner die abuts against the middle step of the triangular core column, at the moment, the outer arc surface of the movable inner die is separated from contact with the inner hole of the rotor core, and the rotor core can be lifted by crane, so that the demoulding of the rotor core is completed.
The lamination die adopts a coupling structure that three steps of the movable inner die and three steps of the triangular core column are inverted, and the lifting screw pulls the movable inner die to move upwards and then can move transversely, so that step surface gaps between adjacent steps of the movable inner die and the triangular core column are eliminated, the outer arc surface of the movable inner die is separated from contact with an inner hole of a rotor core, gaps are formed, the inner hole of the rotor core is not damaged at all, the rotor core which is laminated can be quickly and smoothly lifted, the rotor core is convenient to demould, and the lamination work efficiency and lamination quality of the rotor core are remarkably improved.
Advantages and features of the invention will be illustrated and explained by the following non-limiting description of preferred embodiments, given by way of example only with reference to the accompanying drawings.
Drawings
Fig. 1 is a cross-sectional view of a rotor core lamination die of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is an enlarged view of the portion I of the movable inner mold of FIG. 1, with a step face gap A between the top of the triangular prism and the top of the triangular prism;
FIG. 4 is an enlarged view of a portion II of the movable inner mold of FIG. 1, in which a step face gap A exists between the middle of the movable inner mold and the middle of the triangular prism;
FIG. 5 is an enlarged view of a portion III of the movable inner mold of FIG. 1, showing a step surface gap A between the lower portion of the movable inner mold and the lower portion of the triangular prism;
fig. 6 is an enlarged view of the part I without step face clearance a from the top of the triangular prism after the movable inner mold top of fig. 1 is moved up and moved laterally.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1 and 2, the rotor core lamination die of this embodiment includes a base 1, 7 equal-height blocks 2, a triangular prism 3, a fixed inner die 4, two movable inner dies 5 and two movable inner die traversing mechanisms 6, wherein 5 equal-height blocks 2 are uniformly distributed along the circumference of the base 1, the other two blocks are symmetrically arranged at two sides of the center line of the base 1 in fig. 2, and 7 equal-height blocks 2 are respectively fixed on the outer edges of the upper side surface of the base 1 through fasteners. The lower ends of the positioning rods 7 for calibrating the grooves of the rotor core 10 are respectively fixed on the contour blocks 2. The lower spigot 34 at the bottom center of the triangular prism 3 is fixedly positioned in the center counter bore 11 of the base 1. The fixed internal mold 4 and the two movable internal molds 5 are respectively fixed at the longitudinal centers of the corresponding sides of the triangular prism 3 through 5 fastening screws 54 which are arranged at intervals.
One end of a plurality of locating pins 8 is respectively inserted into and fixed on the two longitudinal sides of the fixed internal mold 4 or the two longitudinal sides of the movable internal mold 5 on the corresponding side surface of the triangular prism 3 at intervals, and respectively and accurately positions the fixed internal mold 4 and the two movable internal molds 5 in the transverse direction.
The fixed inner die 4 and the two movable inner dies 5 are combined bodies of an arch body and a cuboid, and the outer arc surface 54 of the arch body faces the inner hole 101 of the rotor core punching sheet and is matched with the inner hole 101 of the rotor core punching sheet, so that the lamination quality of the rotor core 10 is improved.
The movable internal mold traversing mechanism 6 is respectively arranged on the top end of the triangular prism 3 and the top end of the adjacent movable internal mold 5, and between the movable internal mold 5 and the side surface of the adjacent triangular prism 3. The movable internal mold traversing mechanism 6 comprises a right angle support 61 and a coupling structure 62, the coupling structure 62 is arranged between the movable internal mold 5 and the corresponding side surface of the triangular prism 3, the lower ends of the vertical parts 611 of the right angle support 61 are respectively fixed on the top end of the movable internal mold 5 through screws 34, and the lifting screws 62 are respectively screwed into the top end of the movable internal mold 5 through the horizontal parts 612 of the right angle support 61.
The coupling structure 62 includes three stages of gradually decreasing and increasing length, which are the movable inner mold upper stage 51, the movable inner mold middle stage 52, and the movable inner mold lower stage 53, respectively, provided on one side of the triangular prism 3 adjacent to the movable inner mold 5, gradually outwardly decreasing and decreasing length, and three stages of the triangular prism upper stage 31, the triangular prism middle stage 32, and the triangular prism lower stage 33, respectively. The two adjacent step surfaces are intersected by an oblique angle alpha, meanwhile, the top end of the triangular prism upper step 31 adjacent to the movable internal mold 5 and the bottom end of the movable internal mold lower step 53 are respectively provided with an end oblique angle alpha 1, and the end oblique angle alpha 1 is matched with the oblique angle alpha between the two adjacent step surfaces. The bevel angle α or the end bevel angle α1 of this embodiment is 30 °. The oblique angle alpha or the end oblique angle alpha 1 of 30 degrees can enable the movable inner die 5 to move smoothly relatively between the step surface of the movable inner die and the step surface of the triangular prism contacted with the step surface of the movable inner die in the ascending and traversing sliding process, collision impact can not occur between the step surface of the movable inner die and the step surface of the triangular prism, and the use stability and reliability of the rotor core lamination die are improved.
As shown in fig. 3 to 5, the three steps of the movable inner die 5 and the three steps of the triangular prism 3 are inverted with each other, and in the lamination process of the rotor core lamination, the movable inner die upper step 51 and the upper end of the triangular prism upper step 31, the movable inner die middle step 52 and the upper end of the triangular prism middle step 32, the movable inner die lower step 53 and the triangular prism lower step 33 are respectively abutted against each other. Step surface gaps a=2mm exist between the movable inner die middle step 52 and the triangular prism upper step 31, and between the movable inner die lower step 53 and the triangular prism middle step 32 respectively, in this embodiment, the step surface gaps a can enable the fixed inner die 4 and the two movable inner dies 5 to abut against each other when the rotor core is stacked, and can also enable gaps to be generated between the outer arc surface 54 of the movable inner die 5 and the rotor core inner hole 101 after the movable inner die 5 slides up and moves transversely to eliminate the step surface gaps a, so that the rotor core 10 can be lifted smoothly, the stacking quality and the stacking work efficiency of the rotor core are improved, and the problem that the rotor core is difficult to demould after being stacked is solved.
A laminating method of a rotor core laminating die comprises the following steps:
1) The fixed inner die 4 and the two movable inner dies 5 are fixed on the longitudinal center of the side face of the triangular core column 3 through fastening screws 54, and positioning pins 8 are arranged at intervals on two sides of the fixed inner die 4 and two sides of the two movable inner dies 5 respectively to position the two transverse sides of the fixed inner die 4 and the two movable inner dies 5.
Then the lower spigot 34 at the bottom center of the triangular prism 3 is positioned and fixed in the center counter bore 11 of the base 1 through a screw 36, the lower end of the positioning rod 7 is fixed on the equal-height block 2, and then the assembly of the positioning rod 7 and the equal-height block 2 is arranged along the circumference of the base 1 and is fixed on the outer edge of the upper side surface of the base 1 through a compression screw 37 respectively.
Finally, the lower ends of the vertical parts 611 of the right-angle support 61 are respectively fixed at the top ends of the movable internal molds 5 through upper screws 35, and lifting screws 62 respectively penetrate through the horizontal parts 612 of the right-angle support 61 downwards and are screwed into the top ends of the corresponding movable internal molds 5, so that the assembly of the rotor core lamination mold is completed.
2) The rotor core punching sheet is sleeved on the outer edge of the fixed inner die 4 and the outer edges of the two movable inner dies 5 piece by piece, so that the outer edges of the fixed inner die 4 and the two movable inner dies 5 respectively lean against corresponding positions of the inner holes of the rotor core punching sheet. In the lamination process of the rotor core punching sheet, the rotor core groove type is tidied by the positioning rod 7, and in the lamination height rising process of the rotor core punching sheet, when the lamination height of the rotor core punching sheet reaches the position of the fastening screw 54 for fixedly connecting the movable inner die 5 and the triangular prism 3, the fastening screw 54 at the position is removed. When the lamination of the rotor core punched pieces is completed, all the fastening screws 54 for fixedly connecting the movable inner mold 5 and the triangular prism 3 have been removed.
3) The lifting screws 62 are respectively screwed by using a spanner, the lifting screws 62 pull the corresponding movable internal mold 5to move upwards, the upper step 51 of the movable internal mold moves upwards to slide across the end oblique angle alpha 1 of the upper step 31 of the triangular prism and then move towards the triangular prism 3, the gap A of the step surface is eliminated, the middle step 52 of the movable internal mold is abutted against the upper step 31 of the triangular prism, and the lower step 53 of the movable internal mold is abutted against the middle step 32 of the triangular prism. At this time, the outer arc surface 54 of the movable inner mold 5 is out of contact with the rotor core inner bore 101. The crane can hoist the rotor core 10, thereby completing the demoulding of the rotor core 10.
In addition to the above embodiments, other embodiments of the present invention are possible, and all technical solutions formed by equivalent substitution or equivalent transformation are within the scope of the present invention.
Claims (7)
1. The rotor core lamination die comprises a base and a plurality of equal-height blocks, wherein the equal-height blocks are circumferentially arranged along the base and are respectively fixed on the outer edges of the upper side surfaces of the base; the device is characterized by further comprising a triangular prism, a fixed inner die, two movable inner dies and two movable inner die traversing mechanisms, wherein the triangular prism is vertically fixed at the center of the base, and the fixed inner die and the two movable inner dies are respectively fixed at the longitudinal centers of the corresponding side surfaces of the triangular prism through a plurality of fastening screws arranged at intervals; the movable internal mold traversing mechanism is respectively arranged on the top end of the triangular prism and the top end of the adjacent movable internal mold and between the movable internal mold and the side surface of the adjacent triangular prism, the movable internal mold traversing mechanism comprises a right-angle support and a coupling structure, the coupling structure is arranged between the movable internal mold and the side surface of the corresponding triangular prism, the lower vertical end of the right-angle support is respectively fixed on the top end of the movable internal mold, a lifting screw is respectively screwed into the top end of the movable internal mold through the horizontal part of the right-angle support, the coupling structure comprises three-stage steps which are gradually contracted at one side of the movable internal mold and gradually increased in length, namely an upper stage of the movable internal mold, a middle stage of the movable internal mold and a lower stage of the movable internal mold, and three-stage steps which are gradually protruded at one side of the triangular prism adjacent to the movable internal mold and gradually decreased in length are respectively an upper stage of the triangular prism, a middle stage of the triangular prism and a lower stage of the triangular prism, the two adjacent stage surfaces are intersected at an oblique angle alpha, the three-stage steps of the movable internal mold and the three-stage steps of the triangular prism are mutually inverted, and in the lamination process of the rotor core lamination, the upper stage and the upper stage of the movable internal mold and the lower stage are gradually contracted at one side of the upper stage of the movable internal mold and the upper end of the triangular prism respectively The lower end of the lower step of the movable inner die and the lower step of the triangular core column are respectively abutted against each other, a step surface gap A is respectively formed between the middle step of the movable inner die and the upper step of the triangular core column, and when the rotor core is laminated, an inner hole of the rotor core which is laminated up and down is abutted against the outer edge of the fixed inner die and the outer edges of the two movable inner dies.
2. The rotor core lamination die of claim 1, wherein the fixed inner die and the two movable inner dies are both a combination of an arch body and a cuboid, and the outer arc surface of the arch body faces the inner hole of the rotor core and is matched with the inner hole of the rotor core.
3. The rotor core lamination die of claim 1, wherein one end of the plurality of positioning pins are respectively inserted and fixed on both longitudinal sides of the fixed inner die or on both longitudinal sides of the movable inner die on the corresponding side surfaces of the triangular prism at intervals.
4. The rotor core lamination die of claim 1, wherein the step face gap a = 1.5-2.5 mm.
5. The rotor core lamination die as claimed in claim 1, wherein an end bevel angle α1 is provided at a top end of an upper step of the triangular prism adjacent to the movable inner die and a bottom end of a lower step of the movable inner die, respectively, and the end bevel angle α1 is matched with a bevel angle α between two adjacent step surfaces.
6. The rotor core lamination die of claim 5, wherein the bevel angle α or the end bevel angle α1 is 28 ° to 32 °.
7. A lamination method of a rotor core lamination mold as defined in any one of claims 1 to 6, comprising the steps of:
1) The method comprises the steps of fixing a fixed inner die and two movable inner dies on the longitudinal center of the side face of a triangular core column through fastening screws, respectively installing positioning pins at intervals on two sides of the fixed inner die and two sides of the two movable inner dies, and positioning the fixed inner die and two movable inner dies on the two lateral sides of the triangular core column;
then positioning and fixing a lower spigot at the bottom center of the triangular prism in a center counter bore of the base, and then arranging equal-height blocks along the circumferential direction of the base to be respectively fixed on the outer edges of the upper side surfaces of the base;
Finally, fixing the lower ends of the vertical parts of the right-angle supports at the top ends of the movable internal molds respectively, and screwing lifting screws into the corresponding top ends of the movable internal molds respectively by penetrating the horizontal parts of the right-angle supports downwards to complete the assembly of the rotor core lamination mold;
2) The method comprises the steps of sleeving a rotor core punching sheet on the outer edges of a fixed inner die and the outer edges of two movable inner dies one by one, so that the outer edges of the fixed inner die and the outer edges of the two movable inner dies respectively lean against corresponding positions of inner holes of the rotor core punching sheet;
3) The lifting screws are respectively screwed by using a spanner, the lifting screws pull the corresponding movable inner die to move upwards, the upper step of the movable inner die moves upwards to slide through the end bevel angle alpha 1 of the upper step of the triangular core column and then move towards the triangular core column, the gap A of the step surface is eliminated, the middle step of the movable inner die abuts against the upper step of the triangular core column, the lower step of the movable inner die abuts against the middle step of the triangular core column, at the moment, the outer arc surface of the movable inner die is separated from contact with the inner hole of the rotor core, and the rotor core can be lifted by crane, so that the demoulding of the rotor core is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011302837.3A CN112491219B (en) | 2020-11-19 | 2020-11-19 | Rotor core lamination die and lamination method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011302837.3A CN112491219B (en) | 2020-11-19 | 2020-11-19 | Rotor core lamination die and lamination method |
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| CN112491219A CN112491219A (en) | 2021-03-12 |
| CN112491219B true CN112491219B (en) | 2025-01-10 |
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| CN115173643A (en) * | 2022-07-03 | 2022-10-11 | 浙江迪贝电气股份有限公司 | Manufacturing method of spoke type rotor core |
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| CN103746521A (en) * | 2013-12-24 | 2014-04-23 | 上海电科电机科技有限公司 | Round iron core punching lamination adjusting expander and lamination method |
| CN109088521A (en) * | 2018-09-17 | 2018-12-25 | 上海马拉松·革新电气有限公司 | A kind of manufacture craft of exciter stator iron core |
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| JPH0690549A (en) * | 1991-12-02 | 1994-03-29 | Mitsui High Tec Inc | Laminated core of rotor and manufacture thereof |
| JPH1066315A (en) * | 1996-08-20 | 1998-03-06 | Fujitsu General Ltd | Molding die for insulation of stator |
| CN203014613U (en) * | 2012-12-11 | 2013-06-19 | 中国船舶重工集团公司第七0七研究所 | Non-salient pole type skewed slot rotor core stacking die |
| CN204771707U (en) * | 2015-07-06 | 2015-11-18 | 镇江中船现代发电设备有限公司 | Pole core drilling and tapping anchor clamps |
| JP7167805B2 (en) * | 2019-03-26 | 2022-11-09 | 株式会社アイシン | Rotor manufacturing method |
| CN111682717B (en) * | 2020-07-14 | 2024-12-06 | 镇江中船现代发电设备有限公司 | Stator core internal positioning stacking tooling and method |
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- 2020-11-19 CN CN202011302837.3A patent/CN112491219B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746521A (en) * | 2013-12-24 | 2014-04-23 | 上海电科电机科技有限公司 | Round iron core punching lamination adjusting expander and lamination method |
| CN109088521A (en) * | 2018-09-17 | 2018-12-25 | 上海马拉松·革新电气有限公司 | A kind of manufacture craft of exciter stator iron core |
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