CN107968534B - Stator laminating die with full notch positioning function - Google Patents
Stator laminating die with full notch positioning function Download PDFInfo
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- CN107968534B CN107968534B CN201711345052.2A CN201711345052A CN107968534B CN 107968534 B CN107968534 B CN 107968534B CN 201711345052 A CN201711345052 A CN 201711345052A CN 107968534 B CN107968534 B CN 107968534B
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- stator
- positioning
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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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
A stator laminating mold with full notch positioning relates to a stator laminating mold. At present, the production of the lamination mould causes a large amount of reworked and scrapped products, which affects the exchange period and the cost. The invention comprises an expansion sleeve, an expansion core, a positioning key, a limiting plate arranged below the expansion core, a positioning plate arranged on the periphery of the lower part of the expansion sleeve, a die bottom plate, a stator lower backing plate arranged above the positioning plate and a stator upper pressing plate arranged on the outer side of the upper part of the expansion sleeve, wherein the lower end of the expansion core is connected with a power mechanism. When the expanding core moves downwards, the expanding core pushes the radial outward movement of the positioning keys with the same number as the stator slots, so that the stator slots are aligned in a one-to-one correspondence manner, then the expanding core moves downwards continuously, the expanding sleeve is pushed laterally to move radially outwards, the alignment with the inner diameter of the stator is realized, the alignment quality of the stator slots can be effectively improved in a one-to-one full slot positioning alignment manner with all the stator slots, the quality problems of saw tooth shape and the like of the stator slots in alignment are solved, and the number of reworked and scrapped products is reduced.
Description
Technical Field
The invention relates to a stator lamination die, in particular to a full notch positioning stator lamination die.
Background
Three-piece type expansion sleeves are used for lamination of a stator core of a telephone for a long time, each expansion sleeve is provided with a positioning key, the slot type of the stator is shallower, the slot teeth are wider, the lamination tool can meet the requirements of the stator on a low-efficiency motor with thicker materials, but with the rising of the high-efficiency motor, particularly the batch production of the motor of an automobile, the slot type of the stator is deeper and deeper, the slot teeth are thinner and thinner, the material of the stator core produced by the tool is thinner and thinner, and the notch is easy to have saw-tooth defects.
Especially, at the present day that the labor cost is continuously increased and the energy price is continuously increased, the original lamination die is adopted for production, so that a large number of reworked and scrapped products are caused, and the exchange period and the cost are affected.
Disclosure of Invention
The technical problem to be solved and the technical task to be put forward in the invention are to perfect and improve the prior art scheme, and the invention provides a full notch positioning stator lamination die, aiming at improving the stator lamination quality. For this purpose, the present invention adopts the following technical scheme.
The utility model provides a stator laminating mould of full notch location, includes and rises cover, rises the core, the locating key, locates the limiting plate of rising the core below, locates the locating plate of rising cover lower part periphery, mould bottom plate, locates the stator lower bolster above the locating plate and locates the stator top board of rising cover upper portion outside, rise core lower extreme connect power unit, stator lower bolster and stator top board between be used for placing the stator towards the piece, location key quantity and stator notch quantity match with stator notch position, the inboard and the core sliding connection that rise of locating key, the slip direction is the tapering direction of rising the core, the outside of locating key pass the through side mouth that rises and set up on the cover to with through side mouth sliding fit, through the sliding connection of power unit pulling rising core tapering direction, promote the locating key side to pass through the side mouth, insert the stator notch in order to realize reason Ji Dingzi notch; the expansion core is matched with the expansion sleeve by a conical surface with a small diameter and a large diameter, the expansion sleeve can move transversely, the positioning plate realizes the movement limit of the expansion sleeve, and the expansion sleeve realizes the lateral movement to the outside by the conical surface matching of the expansion core and the limit of the positioning plate so as to achieve Ji Dingzi inner diameter. When the expanding core moves downwards, the expanding core pushes the radial outward movement of the positioning keys with the same number as the stator slots, so that the stator slots are aligned in a one-to-one correspondence manner, then the expanding core moves downwards continuously, the expanding sleeve is pushed laterally to move radially outwards, the alignment with the inner diameter of the stator is realized, the alignment quality of the stator slots can be effectively improved in a one-to-one full slot positioning alignment manner with all the stator slots, the quality problems of saw tooth shape and the like of the stator slots in alignment are solved, and the number of reworked and scrapped products is reduced.
As a further improvement and supplement to the above-mentioned technical solutions, the present invention also includes the following additional technical features.
The top of the expansion core is provided with a limiting spigot, and the inner side of the stator lower backing plate is provided with a positioning spigot. When the expansion core moves downwards, the limiting spigot and the positioning spigot are convenient for realizing the final outward movement limiting of the positioning key from the top and the bottom.
The positioning key and the expansion core are in sliding fit through a dovetail groove or a slide rail groove of a dovetail groove or a circular groove. All three grooves can prevent the positioning key from being separated laterally.
The cross section outside the locating key is triangle-shaped, and the side edge line and the upper and lower tip edge line outside the locating key are all circular arc transition. The outer triangular section and the ridge arc transition treatment can conveniently realize a smoother guiding function.
The bottom of the expansion core is provided with a sliding rail groove opening. The opening of the sliding rail groove is convenient for the positioning key to be inserted into the sliding rail groove from bottom to top.
The center of the lower end of the expansion core is provided with a threaded hole interface connected with the power mechanism. The threaded hole interface is convenient to process and stable and reliable in connection.
The expansion sleeve consists of a plurality of same sub-sleeve pieces, and each sub-sleeve piece is provided with through side openings with the same number as the corresponding positioning keys. The multi-piece expansion sleeve is relatively simple in structure, and radial movement of each positioning key can be realized through the through side ports with the same number as the corresponding positioning keys.
The lower end outside of the expansion sleeve is provided with a step, the lower part inside of the positioning plate is provided with a pressing step which is matched with the step of the expansion sleeve in a pressing mode, the step of the expansion sleeve is in sliding fit with the pressing step of the positioning plate, and when the expansion core moves downwards, the expansion sleeve moves outwards in a radial direction under the guiding effect of the positioning key. Through the cooperation of step and pressure step, guarantee that the cover that rises can not reciprocate to through the guide effect of locating key, can only realize radial movement.
The middle of the expansion core is provided with a truncated cone hole with an opening at the top, the conical surface of the truncated cone hole is equidistant with the outer side surface of the expansion core, and the upper end of the threaded hole interface is in penetrating connection with the truncated cone hole. Through set up the circular truncated cone hole in the centre of rising the core, greatly reduced the weight of rising the core, reduced the use of material, reduce material cost, the screw hole interface runs through, and the use of being convenient for carries out interface connection in the area nut bolt, compares in direct screw connection, and the connection is more firm.
The outer sides of the stator lower backing plate and the stator upper pressing plate are provided with buckling piece pressing grooves corresponding to the buckling piece grooves of the stator core. The buckle sheet pressing groove is convenient for placing buckle sheets, and buckle sheet fastening during lamination is realized.
The beneficial effects are that: the stator notch trimming device has the advantages of effectively improving the trimming quality of stator notches, reducing the number of reworked and scrapped products, reducing the rejection rate of the products, further reducing the average cost of the products, along with simple structure, low cost and high working reliability.
Drawings
Fig. 1 is a schematic view of a product structure in which a stator core is placed according to the present invention.
Fig. 2 is a schematic cross-sectional structure of a product of the present invention with a stator core disposed therein.
FIG. 3 is a schematic illustration of the cross-sectional structure of A-A of FIG. 2 in accordance with the present invention.
Fig. 4 is an enlarged view of a portion of fig. 3B in accordance with the present invention.
FIG. 5 is a schematic view of the expansion joint of the present invention.
In the figure: 1-expanding sleeve; 2-expanding the core; 3-positioning key; 4-limiting plates; 5-positioning plates; 6-a die bottom plate; 7-a stator lower backing plate; 8-a stator upper pressing plate; 9-stator core; 101-steps; 102-a through side port; 201-limiting rabbets; 202-a threaded bore interface; 203-truncated cone holes; 501-pressing; 701-positioning the spigot; 901-cleat grooves.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the attached drawings.
As shown in fig. 1-4, a full-notch positioning stator laminating mold comprises an expansion sleeve 1, an expansion core 2, positioning keys 3, a limiting plate 4 arranged below the expansion core 2, a positioning plate 5 arranged on the periphery of the lower part of the expansion sleeve 1, a mold bottom plate 6, a stator lower backing plate 7 arranged above the positioning plate 5 and a stator upper pressing plate 8 arranged on the outer side of the upper part of the expansion sleeve 1, wherein the lower end of the expansion core 2 is connected with a power mechanism, stator punching sheets are arranged between the stator lower backing plate 7 and the stator upper pressing plate 8, the number of the positioning keys 3 is the same as that of stator notches, the arrangement positions of the positioning keys 3 are matched with the positions of the stator notches, the inner sides of the positioning keys 3 are in sliding connection with the expansion core 2, the sliding direction is the taper direction of the expansion core 2, the outer sides of the positioning keys 3 penetrate through a through side opening 102 arranged on the expansion sleeve 1 and are in sliding fit with the through side opening 102, the expansion core 2 is pulled by the power mechanism to descend, and the expansion core 2 is pushed to laterally penetrate through the through side opening 102 in sliding connection with the taper direction of the positioning keys 3, and Ji Dingzi notches are inserted into the stator notches; the expansion core 2 is matched with the expansion sleeve 1 by a conical surface with a smaller diameter and a larger diameter, the expansion sleeve 1 can transversely move, the positioning plate 5 can limit the movement of the expansion sleeve 1, and the expansion sleeve 1 can transversely move outwards to adjust the inner diameter of Ji Dingzi by being matched with the conical surface of the expansion core 2 and limit the positioning plate 5.
In order to realize the outward movement limit, the top of the expansion core 2 is provided with a limit spigot 201, and the inner side of the stator lower backing plate 7 is provided with a positioning spigot 701. When the expansion core 2 moves downwards, the limiting spigot 201 and the positioning spigot 701 facilitate the final outward movement limiting of the positioning key 3 from the top and the bottom.
In order to prevent the lateral separation, the positioning key 3 and the expansion core 2 are in sliding fit through a dovetail groove or a slide rail groove of a dovetail groove or a circular groove. All three grooves can prevent the positioning key 3 from being separated laterally.
In order to facilitate guiding, the cross section of the outer side of the positioning key 3 is triangular, and the side edge line of the outer side of the positioning key 3 and the edge line of the upper end and the edge line of the lower end are in arc transition. The outer triangular section and the ridge arc transition treatment can conveniently realize a smoother guiding function.
In order to facilitate the installation of the positioning key 3, the bottom of the expansion core 2 is provided with a sliding rail groove opening. The opening of the sliding rail groove is convenient for the positioning key 3 to be inserted into the sliding rail groove from bottom to top.
For easy connection, the center of the lower end of the expansion core 2 is provided with a threaded hole interface 202 connected with a power mechanism. The threaded hole interface 202 is convenient to process, convenient to connect and stable and reliable in connection.
In order to realize radial movement of the expansion sleeve 1 and the positioning keys 3, the expansion sleeve 1 consists of a plurality of same sub-sleeve pieces, and each sub-sleeve piece is provided with through side ports 102 with the same number as the corresponding positioning keys 3. The multi-piece expansion sleeve 1 is relatively simple in structure, and radial movement of each positioning key 3 can be realized through the same number of through side ports 102 as the corresponding positioning keys 3.
In order to prevent the vertical movement of the expansion sleeve 1, the outer side of the lower end of the expansion sleeve 1 is provided with a step 101, the inner side of the lower part of the positioning plate 5 is provided with a pressing step 501 which is matched with the step 101 of the expansion sleeve 1 in a pressing mode, the step 101 of the expansion sleeve 1 is in sliding fit with the pressing step 501 of the positioning plate 5, and when the expansion core 2 moves downwards, the expansion sleeve 1 moves outwards in a radial direction under the guiding effect of the positioning key 3. Through the cooperation of step 101 and pressure step 501, guarantee that cover 1 can not vertically move to through the guiding action of locating key 3, only realize radial movement.
In order to reduce weight, the middle of the expansion core 2 is provided with a truncated cone hole 203 with an open top, the conical surface of the truncated cone hole 203 is equidistant with the outer side surface of the expansion core 2, and the upper end of the threaded hole interface 202 is connected with the truncated cone hole 203 in a penetrating way. By arranging the truncated cone hole 203 in the middle of the expansion core 2, the weight of the expansion core 2 is greatly reduced, the use of materials is reduced, the cost of the materials is reduced, the threaded hole interface 202 penetrates through, the nut and bolt are convenient to use for interface connection, and compared with direct screw connection, the connection is firmer.
In order to facilitate the installation of the cramp, a cramp pressing groove is arranged at the outer side of the stator lower backing plate 7 and the stator upper pressing plate 8 and at a position corresponding to the cramp groove 901 of the stator core 9. The buckle sheet pressing groove is convenient for placing buckle sheets, and buckle sheet fastening during lamination is realized.
When the stator core 9 is laminated, the expanding core 2 is jacked by the power mechanism, the positioning key 3 and the expanding sleeve 1 shrink, the well-arranged stator punching sheets are placed in the buckling sheet grooves 901 of the stator core 9, the stator upper pressing plate 8 is placed, the power mechanism is pulled down, the expanding core 2 moves downwards along with the descending, the expanding core 2 pushes the positioning key 3 to move radially outwards to enter the stator notch to achieve one-to-one geographic alignment of the stator notch, then the power mechanism continues to pull downwards, the expanding core 2 continues to move downwards to be in contact with the conical surface of the expanding sleeve 1, the expanding sleeve 1 is pushed to move radially outwards in a lateral direction, the inner diameter of the stator is expanded, the inner diameter of the stator is aligned with the inner diameter of the stator, after the buckling sheets are fastened, the power mechanism is jacked up, the expanding core 2 ascends, the expanding sleeve 1 and the positioning key 3 shrink in sequence, and the stator core 9 can be easily taken out from the tool. Through the full notch location reason of the one-to-one with all stator notch neat mode, can promote stator notch reason neat quality effectively, solved stator notch and appearing quality problems such as cockscomb structure when reason is neat, reduced the quantity of reprocessing and scrapping product.
In this example, the power mechanism is an oil cylinder.
The stator lamination mold with the full slot positioning shown in the above fig. 1-4 is a specific embodiment of the present invention, has already demonstrated the substantial characteristics and improvements of the present invention, and can be modified in terms of shape, structure, etc. according to practical use requirements, under the teaching of the present invention, all of which are within the scope of protection of the present invention.
Claims (8)
1. A stator lamination mould of full notch location, its characterized in that: the stator punching device comprises an expansion sleeve (1), an expansion core (2), positioning keys (3), a limiting plate (4) arranged below the expansion core (2), a positioning plate (5) arranged on the periphery of the lower part of the expansion sleeve (1), a die bottom plate (6), a stator lower base plate (7) arranged above the positioning plate (5) and a stator upper pressing plate (8) arranged on the outer side of the upper part of the expansion sleeve (1), wherein the lower end of the expansion core (2) is connected with a power mechanism, stator punching sheets are arranged between the stator lower base plate (7) and the stator upper pressing plate (8), the number of the positioning keys (3) is the same as that of stator slots, the arrangement positions of the positioning keys (3) are matched with the positions of the stator slots, the inner side of the positioning keys (3) are in sliding connection with the expansion core (2), the sliding direction is the taper direction of the expansion core (2), the outer side of the positioning keys (3) penetrate through a through side opening (102) arranged on the expansion sleeve (1) and are in sliding fit with the through side opening (102), the expansion core (2) is pulled by the power mechanism to move down, and the positioning keys (3) are pushed by the power mechanism to penetrate through the stator slots (62) in the sliding direction to realize lateral connection with the stator slots (3) and the slot opening (383; the expansion core (2) is matched with the expansion sleeve (1) by a conical surface with a small diameter and a large diameter, the expansion sleeve (1) can move transversely, the positioning plate (5) realizes the movement limit of the expansion sleeve (1), the expansion sleeve (1) transversely moves outwards by the conical surface matched with the expansion core (2) and the limit of the positioning plate (5) so as to form a Ji Dingzi inner diameter, and the die bottom plate (6) is positioned on the lower sides of the positioning plate (5) and the expansion sleeve (1);
the expansion sleeve (1) consists of a plurality of identical sub-sleeve pieces, and each sub-sleeve piece is provided with through side ports (102) with the same number as the corresponding positioning keys (3);
the lower extreme outside of cover (1) that rises be equipped with step (101), the lower part inboard of locating plate (5) be equipped with step (101) looks pressure of cover (1) that rises and press-fit's step (501), step (101) of cover (1) that rises and step (501) of locating plate (5) between be sliding fit, when rising core (2) and move down, the guide effect that rises cover (1) through locating key (3) realizes radially outwards moving.
2. The full slot positioned stator lamination die of claim 1, wherein: the top of the expansion core (2) is provided with a limiting spigot (201), and the inner side of the stator lower backing plate (7) is provided with a positioning spigot (701).
3. The full slot positioned stator lamination die of claim 1, wherein: the positioning key (3) and the expansion core (2) are in sliding fit through a dovetail groove or a slide rail groove of a dovetail groove or a circular groove.
4. The full slot positioned stator lamination die of claim 1, wherein: the cross section of the outer side of the positioning key (3) is triangular, and the side edge line and the upper end edge line and the lower end edge line of the outer side of the positioning key (3) are in arc transition.
5. A full slot positioned stator lamination die as defined in claim 3, wherein: the bottom of the expansion core (2) is provided with a sliding rail groove opening.
6. The full slot positioned stator lamination die of claim 1, wherein: the center of the lower end of the expansion core (2) is provided with a threaded hole interface (202) connected with the power mechanism.
7. The full slot positioned stator lamination die of claim 6, wherein: the middle of the expansion core (2) is provided with a truncated cone hole (203) with an opening at the top, the conical surface of the truncated cone hole (203) is equidistant with the outer side surface of the expansion core (2), and the upper end of the threaded hole interface (202) is in penetrating connection with the truncated cone hole (203).
8. The full slot positioned stator lamination die of claim 1, wherein: the stator lower backing plate (7) and the stator upper pressing plate (8) are provided with buckling piece pressing grooves at positions corresponding to the buckling piece grooves (901) of the stator iron core (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711345052.2A CN107968534B (en) | 2017-12-15 | 2017-12-15 | Stator laminating die with full notch positioning function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711345052.2A CN107968534B (en) | 2017-12-15 | 2017-12-15 | Stator laminating die with full notch positioning function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107968534A CN107968534A (en) | 2018-04-27 |
| CN107968534B true CN107968534B (en) | 2023-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711345052.2A Active CN107968534B (en) | 2017-12-15 | 2017-12-15 | Stator laminating die with full notch positioning function |
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| CN (1) | CN107968534B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211890871U (en) * | 2019-12-23 | 2020-11-10 | 昆山阿普顿自动化***有限公司 | Casing stator grabbing device |
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| JPH07245923A (en) * | 1994-03-07 | 1995-09-19 | Matsushita Seiko Co Ltd | Manufacture of stator for motor |
| CN201928163U (en) * | 2011-03-09 | 2011-08-10 | 朱明初 | Stator iron core press mounting device |
| 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 |
| CN103545993A (en) * | 2013-10-24 | 2014-01-29 | 山东华力电机集团股份有限公司 | Expander used for manufacturing cast-aluminum rotor |
| CN203896136U (en) * | 2014-04-01 | 2014-10-22 | 嵊州市保尔模具材料有限公司 | Split-type stator overlying mold |
| CN204928505U (en) * | 2015-09-18 | 2015-12-30 | 江苏吉泓达电机科技有限公司 | Quick tight device that expands is pressed to unshakable in one's determination folding of motor stator |
| CN105429386A (en) * | 2015-12-20 | 2016-03-23 | 重庆赛力盟电机有限责任公司 | Overlaying buckling sheet tooling |
| CN105515299A (en) * | 2016-02-17 | 2016-04-20 | 常州神力电机股份有限公司 | Overlying tool for large motor stator iron core |
| CN205377595U (en) * | 2015-12-20 | 2016-07-06 | 重庆赛力盟电机有限责任公司 | Lamination device |
| CN106464101A (en) * | 2014-05-20 | 2017-02-22 | 日特机械工程株式会社 | Stator manufacturing device and manufacturing method |
| CN106533079A (en) * | 2016-12-14 | 2017-03-22 | 南京起重电机总厂 | Buckle piece lamination device of conical stator punching sheet |
| CN106602806A (en) * | 2016-12-28 | 2017-04-26 | 福安市中虹机电技术开发有限公司 | Stator automatic piling press |
| CN206389245U (en) * | 2016-12-07 | 2017-08-08 | 江苏经纬轨道交通设备有限公司 | motor stator laminating tool |
| CN212526101U (en) * | 2020-07-15 | 2021-02-12 | 重庆新登奇机电技术有限公司 | Positioning tool for motor cutting |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130113324A1 (en) * | 2011-09-28 | 2013-05-09 | Hamilton Sundstrand Corporation | Tapered rotor assembly |
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2017
- 2017-12-15 CN CN201711345052.2A patent/CN107968534B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07245923A (en) * | 1994-03-07 | 1995-09-19 | Matsushita Seiko Co Ltd | Manufacture of stator for motor |
| CN201928163U (en) * | 2011-03-09 | 2011-08-10 | 朱明初 | Stator iron core press mounting device |
| 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 |
| CN103545993A (en) * | 2013-10-24 | 2014-01-29 | 山东华力电机集团股份有限公司 | Expander used for manufacturing cast-aluminum rotor |
| CN203896136U (en) * | 2014-04-01 | 2014-10-22 | 嵊州市保尔模具材料有限公司 | Split-type stator overlying mold |
| CN106464101A (en) * | 2014-05-20 | 2017-02-22 | 日特机械工程株式会社 | Stator manufacturing device and manufacturing method |
| CN204928505U (en) * | 2015-09-18 | 2015-12-30 | 江苏吉泓达电机科技有限公司 | Quick tight device that expands is pressed to unshakable in one's determination folding of motor stator |
| CN105429386A (en) * | 2015-12-20 | 2016-03-23 | 重庆赛力盟电机有限责任公司 | Overlaying buckling sheet tooling |
| CN205377595U (en) * | 2015-12-20 | 2016-07-06 | 重庆赛力盟电机有限责任公司 | Lamination device |
| CN105515299A (en) * | 2016-02-17 | 2016-04-20 | 常州神力电机股份有限公司 | Overlying tool for large motor stator iron core |
| CN206389245U (en) * | 2016-12-07 | 2017-08-08 | 江苏经纬轨道交通设备有限公司 | motor stator laminating tool |
| CN106533079A (en) * | 2016-12-14 | 2017-03-22 | 南京起重电机总厂 | Buckle piece lamination device of conical stator punching sheet |
| CN106602806A (en) * | 2016-12-28 | 2017-04-26 | 福安市中虹机电技术开发有限公司 | Stator automatic piling press |
| CN212526101U (en) * | 2020-07-15 | 2021-02-12 | 重庆新登奇机电技术有限公司 | Positioning tool for motor cutting |
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| Publication number | Publication date |
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| CN107968534A (en) | 2018-04-27 |
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Address after: 312300 economic development zone, Shangyu District, Zhejiang, Shaoxing Applicant after: WOLONG ELECTRIC GROUP Co.,Ltd. Address before: 312300 economic development zone, Shangyu District, Zhejiang, Shaoxing Applicant before: WOLONG ELECTRIC GROUP Co.,Ltd. |
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