CN206558359U - Winder with guiding mechanism - Google Patents
Winder with guiding mechanism Download PDFInfo
- Publication number
- CN206558359U CN206558359U CN201720302263.7U CN201720302263U CN206558359U CN 206558359 U CN206558359 U CN 206558359U CN 201720302263 U CN201720302263 U CN 201720302263U CN 206558359 U CN206558359 U CN 206558359U
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- winding
- silicon steel
- steel strip
- block
- roller
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Abstract
The utility model is related to a kind of winder with guiding mechanism, belongs to transformer core manufacturing equipment field.Including winding mechanism and unreeling structure, winding mechanism is used for fixing wound block, and drive winding block rotate will silicon steel strip winding to winding block on form iron core, unreeling structure is used to fix the tep reel that silicon steel strip is wound in, and as winding mechanism drives winding block to rotate, silicon steel strip is unreeled therewith during winding silicon steel strip, also include guiding mechanism, guiding mechanism includes being oriented to roller, it is oriented to one end that support arm is fixed at roller two ends, the other end of support arm is fixed on winding mechanism, and it is identical with the height residing for winding block to be oriented to the height residing for roller.This programme makes silicon steel strip, and inswept area diminishes in the course of the work, and the space taken in the course of work is smaller.
Description
Technical field
The utility model is related to iron core manufacturing equipment field, more particularly to a kind of winder with guiding mechanism.
Background technology
Iron core is an essential part in transformer, and iron core includes winding block and be wrapped in a ring to wind outside block
Silicon steel strip constitute.Silicon steel strip is wrapped on winding block, due to winding section that the silicon steel strip that circularizes constitutes closer to circle,
Then the performance of iron core is better.So the width of silicon steel strip is gradual change, as the width of the progress silicon steel strip of winding broadens from narrow
Narrow again so that the section that silicon steel strip is wound in is more nearly circle.
Because silicon steel strip needs holding surface smooth, smooth, still, silicon steel strip is winding before being wound up on winding block
Into tep reel, and the radius of tep reel reduces with unreeling for tep reel so that the height of tep reel top is tapered into, and winds block and consolidate
Fixed position is constant so that silicon steel strip is gradually tilted during unreeling, due to silicon steel strip from winding to unreeling be additionally provided with
Other auxiliary bodies, silicon steel strip sectorial area inswept during inclined is larger, work space-consuming it is larger, and easily with
Other mechanisms collide.
Utility model content
The purpose of this utility model is a kind of winder with guiding mechanism of offer, makes silicon steel strip in the course of the work
Inswept area diminishes, and the space taken in the course of work is smaller.
Above-mentioned purpose of the present utility model technical scheme is that：Including winding mechanism and unreeling machine
Structure, winding mechanism be used for fixing wound block, and drive winding block rotate will silicon steel strip winding to winding block on form iron core, unreel
Mechanism is used to fix the tep reel that silicon steel strip is wound in, and as winding mechanism drives winding block to rotate, during winding silicon steel strip therewith
Silicon steel strip is unreeled, in addition to guiding mechanism, guiding mechanism includes being oriented to roller, be oriented to roller two ends and be fixed on the one of support arm
End, the other end of support arm is fixed on winding mechanism, and it is identical with the height residing for winding block to be oriented to the height residing for roller.
By using above-mentioned technical proposal, silicon steel strip is after stretching tep reel leaves unreeling structure, by leading for guiding mechanism
After being oriented to roller so that silicon steel strip can more level off to it is horizontal to moving at winding block, because winding block is to finished product iron core
In change procedure, the silicon steel tape thickness that is wrapped on iron core is smaller to be ignored, so that silicon steel strip is swept in the course of the work
The area crossed is smaller, and the space of occupancy is smaller.
Further, winding mechanism includes winding case, and winding case side is rotatably connected to the winding for fixing wound block
Seat, winding seat is connected with motor.
By using above-mentioned technical proposal, by winding seat come fixing wound block so that the height and guide roller of winding block
The height of cylinder keeps identical.
Further, platen is further fixed on winding case, platen is less than winding seat in vertical side in the height of vertical direction
Upward height, the platen other end stretches to unreeling structure, and one end that platen stretches to unreeling structure is fixed on the ground by supporting leg,
Support arm is fixed on supporting leg.
By using above-mentioned technical proposal, because the height for being oriented to roller is identical with winding seat height degree, if the height of platen
More than or equal to winding seat height, then platen can hinder silicon steel strip normal through.
Further, support arm is bolted on supporting leg by least two.
By using above-mentioned technical proposal, prevent support arm from rotating.
Further, platen is oriented to roller two ends and is fixed on by angle steel close to one end of winding seat provided with roller is oriented to
On platen.
By using above-mentioned technical proposal, because winding block sheet is as rectangle, when silicon steel strip is wound up, volume
Height around block peak is continually changing so that silicon steel strip follows the guiding roller in swing, this programme so that silicon steel strip is swung
Partial length reduces the wobble length of silicon steel strip, reduces silicon steel strip and exist to wind block to the distance of side steering roll cylinder
The area taken during work.
Further, platen is fixed on the one side of angle bar, and the another side of angle bar is fixed on winding case.
By using above-mentioned technical proposal, because platen is needed perpendicular to winding case, so the side of platen and winding case
It is connected to a fixed, and the quality of platen is larger, is unfavorable for the stability that platen is connected with winding case, so the thickness of platen is needed
It is smaller, but less thickness causes the connection area between platen and winding case to diminish, and is also unfavorable for platen fixation
Stability, so this programme connects platen and winding case by angle bar, because angle bar includes two orthogonal faces, increase
Fixed stability between platen and winding case.
Further, it is oriented to roller surface and is bonded with one layer of rubber.
By using above-mentioned technical proposal so that with being oriented to when roller is in contact rolling friction is occurring for silicon steel strip, without
Easily occurs sliding friction.So that silicon steel belt surface is difficult to be worn, obtained finished iron core performance is more preferable.
Brief description of the drawings
Fig. 1 is the expression integrally-built schematic diagram of winder；
Fig. 2 is the explosive view for representing hold-down mechanism structure；
Fig. 3 is the explosive view for representing another embodiment of hold-down mechanism；
Fig. 4 winds the schematic diagram of block mounting structure for expression；
Fig. 5 is the top view for representing silicon steel strip motion path；
Fig. 6 is the schematic diagram for representing centering body structure；
Fig. 7 is the schematic diagram for representing elastic component position；
Fig. 8 is the schematic diagram for representing flattening mechanism structure；
Fig. 9 is expression pressing plate and the explosive view of base arrangement；
Figure 10 is the schematic diagram for representing motor driving structure；
Figure 11 is the explosive view for representing unreeling structure structure；
Figure 12 is the schematic diagram for representing capping structure；
Figure 13 is the schematic diagram for representing spine barrel structure.
Reference：
1st, unreeling structure；11st, base；12nd, disk is unreeled；121st, spinous foramen；13rd, unreeling shaft；131st, step surface；132nd, screw thread
Hole；14th, spine cylinder；141st, baffle ring；15th, bearing is unreeled；16th, block；161st, flange；
2nd, winding mechanism；21st, case is wound；22nd, seat is wound；221st, grafting fixed column；23rd, power transmission shaft；24th, drive a；
25th, drive b；26th, transmission belt；27th, block is wound；
3rd, hold-down mechanism；31st, clamping frame；311st, supporting plate；312nd, connecting plate；3121st, chute；3122nd, holddown spring；
32nd, disk roller is compressed；33rd, rolling axle；34th, rolling bearing；
4th, centering body；41st, angle bar is supported；42nd, platen；43rd, center slide rail；431st, central slider；44th, elastic slide rail；
441st, elastic slide block；442nd, centre wheel；443rd, elastic component；45th, toggle；46th, it is oriented to roller；47th, support arm；
5th, flattening mechanism；51st, smooth frame；52nd, rotating disk is adjusted；53rd, screw thread depression bar；54a, pressing plate；54b, bottom plate；541st, base
Layer；542nd, rubber layer；543rd, plank layer；544th, screw；55th, indent；56th, thrust bearing；57th, neck；
6th, silicon steel strip；7th, motor.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment one：
As shown in figure 1, a kind of winder, including unreeling structure 1 and winding mechanism 2, unreeling structure 1 is including base 11 and puts
Reel 12, unreels disk 12 and is rotatably connected on base 11, and unreels uniform winding on disk 12 and have silicon steel strip for making iron core
6。
The raw material of silicon steel strip 6 first passes through the silicon steel strip 6 bought to buy on the market, and before using winder winding
Stock-cutter processing, and is cut into the silicon steel strip 6 of width gradual change, then winds and unreel on disk 12.Then disk 12 will be unreeled to be installed to
On base 11.The similar I-beam wheel of shape of disk 12 is unreeled, with groove.Silicon steel strip 6 is wrapped in the groove unreeled on disk 12.When
Unreel the silicon steel strip 6 wound on disk 12 when pulled, unreel disk 12 and rotate and continue to unreel silicon steel strip 6.
With reference to Fig. 1 and Figure 10, winding mechanism 2 includes winding case 21, and winding case 21 front end winds seat 22 provided with winding seat 22
Bottom connects power transmission shaft 23, and power transmission shaft 23 stretches out through winding case 21 and from opposite side, and one end of stretching is connected with drive a24,
The side of winding case 21 is fixed with motor 7, and the output end of motor 7 is connected with drive b25, and two drives are connected by transmission belt 26
Connect.
When motor 7 starts, drive b25 is rotated and is driven drive a24 to rotate by transmission belt 26 so that winding seat
22 rotate.Winding seat 22 is fixed with the winding block 27 for winding silicon steel strip 6, unreels the silicon steel strip 6 taken up on disk 12, free end
Stretch out and be fixed on the side of winding block 27.When motor 7 drives winding block 27 to rotate, silicon steel strip 6, which is pulled, is wrapped in winding
The side of block 27, and if gradually wind dried layer, until reaching set spooling length.Then silicon steel strip 6 is cut short, and removes initial shape
The iron core of state.Then iron core is subjected to annealing sizing and obtains finished product iron core.
With reference to Fig. 4, when winding block 27 is fixed on by grafting fixed column on winding seat 22, the side for winding block 27 is just right
Disk 12 is unreeled, and the side of winding block 27 is provided with the neck for being used for fixing silicon steel strip 6 so that silicon steel strip 6 is from unreeling receiving again
Straight state is in during volume.
As shown in Fig. 2 the lower section of winding seat 22 is provided with hold-down mechanism 3, hold-down mechanism 3 includes clamping frame 31, and clamping frame 31 is wrapped
Include orthogonal supporting plate 311 and connecting plate 312.The bottom of connecting plate 312 is fixed on winding case 21 by supporting plate 311,
Top is connected with compression disk roller 32.Disk roller 32 is compressed to be set on rolling axle 33 and between rolling axle 33 and the compression disk roller 32
Tight fit has rolling bearing 34.Connecting plate 312 is two pieces and is relatively arranged in supporting plate 311.Disk roller 32 is compressed to be set in
The centre position of rolling axle 33.Connecting plate 312 is provided with chute 3121, and the two ends of rolling axle 33 are slidably connected at the chute
In 3121.The chute 3121 is that vertical direction sets and is internally provided with holddown spring 3122, the holddown spring 3122
It is fixed in contraction state and one end in the bottom of chute 3121, the other end is fixed on the end of rolling axle 33.
Compress disk roller 32 to contradict in the presence of holddown spring 3122 on winding block 27, silicon steel strip 6 is pushed up from winding block 27
Portion is initially wrapped around on winding block 27.Winding block 27 is set constantly to wind silicon steel strip 6 under the drive of motor 7, silicon steel strip 6
When by compressing between disk roller 32 and winding block 27, it is compacted disk roller 32 and is pressed on winding block 27 so that on winding block 27
Silicon steel strip 6 wind uniformly, and between every layer of silicon steel strip 6 be in close contact.
Embodiment two：
As shown in figure 3, being with the difference of embodiment one, each connecting plate 312 is located at provided with three chutes 3121
Middle chute 3121 vertically extends, and the chute 3121 of both sides is symmetrically set on chute 3121 in an intermediate position
Put.The two ends of rolling axle 33 can be extended with the projection for being slidably fitted in each chute 3121.
Embodiment three：
With reference to Fig. 5~Fig. 7, a kind of winder, the difference with embodiment one is, between winding mechanism 2 and unreeling structure 1
Provided with centering body 4, centering body 4 includes support angle bar 41, and two pieces of iron plates that support angle bar 41 is integrated casting are constituted,
One of iron plate is fitted in side of the winding case 21 provided with winding seat 22 by the way that bolt is parallel, and another piece of iron plate is perpendicular to winding
Platen 42 is fixed with case 21 and the face of its level upward.Center slide rail 43 is provided with along the length direction of platen 42 on platen 42, when
The flat state of silicon steel strip 6 is from when unreeling Pan12Chu stretchings and on winding block 27, and center slide rail 43 is with silicon steel strip 6 in platform
The top of plate 42 by when the track that leaves be parallel to each other.The two ends of center slide rail 43 are provided with elastic slide rail 44, the length of elastic slide rail 44
Spend direction vertical with the length direction of center slide rail 43.And stay at regular intervals between elastic slide rail 44 and center slide rail 43.
Wherein, central slider 431 is sliding combined with center slide rail 43, two is sliding combined with each elasticity slide rail 44
Individual elastic slide block 44, and the top of two elastic slide block 44 is provided with the centre wheel 442 for being used for clamping silicon steel strip 6.Each elasticity slide rail 44
On elastic slide block 44 be connected by elastic component 443, and elastic component 443 is applied to the power of two elastic slide blocks 441, makes two elasticity
Sliding block 441 has the trend of relative motion.
Elastic component 443 in this programme is rubber band, according to actual conditions in two relative centre wheels 442 and elastic slide block
Connecting place between 441, is nested together with rubber band, and is arranged multiple rubber bands.Make two centre wheels 442 using the elastic force of rubber band
It is close, when silicon steel strip 6 is by between two centre wheels 442, rubber band is strutted so that the distance between two centre wheels 442 are with silicon
The change of the width of steel band 6 and change, the both sides of silicon steel strip 6 are fitted in all the time.The central shaft intersection point of center slide rail 43 falls in two bullets
The center of distance between property sliding block 441.Central slider 431 also for two and is respectively arranged on the two ends of center slide rail 43, leads to
Toggle 45 is crossed with elastic slide block 441 to be connected.Connect two toggles 45 on each center slide rail 43, and during the one end of toggle 45 is hinged on
On heart sliding block 431, the other end is articulated with elastic slide block 441.And being hinged in central slider 431 of two toggles 45 per side
The distance between point is more than the maximum winding width of silicon steel strip 6.When between centre wheel 442 not by silicon steel strip 6, two centre wheels
The distance between 442 are less than the minimum winding width of silicon steel strip 6.
Winding block 27 is fixed on winding seat 22 first, disk 12 then will be manually unreeled and be installed on base 11.Draw
The end of silicon steel strip 6, and pull the end of silicon steel strip 6 to pass sequentially through centering body 4.When by centering body 4, silicon steel strip 6
Both sides relative centre wheel 442 is strutted, and continue to the extension of winding block 27 direction, after two pairs of centre wheels 442, by silicon
The end of steel band 6 is fixed on winding block 27.Then starting motor 7 drives winding block 27 to rotate.Due to central slider 431, hinge
An isosceles triangle is constituted between bar 45 and elastic slide rail 44, and when elastic slide block 441 is slided on elastic slide rail 44,
Central slider 431 is slided along center slide rail 43 all the time, and the shape of three's composition is still isosceles triangle so that the width of silicon steel strip
When degree changes, center can be also in all the time.
Example IV：
With reference to Fig. 6 and Fig. 8, a kind of winder and the difference of embodiment three are, in addition to flattening mechanism 5.Flattening mechanism 5
Including smooth frame 51, the smooth two ends of frame 51 are bolted on platen 42 close to one end of unreeling structure 1.The smooth both sides of frame 51
Relative one side, which is arranged with neck 57, neck 57, on support body is stacked with shape identical bottom plate 54b and pressing plate 54a.Bottom plate
54b is set close to platen 42, and pressing plate 54a can vertically be slided in neck 57.The smooth top of frame 51, which is worn, has penetrated screw thread
Depression bar 53, the top of screw thread depression bar 53 is fixed with regulation rotating disk 52, and screw thread depression bar 53 is coordinated with smooth frame 51 by screw thread.Pass through
Rotating regulation rotating disk 52 makes to relatively rotate between screw thread depression bar 53 and smooth frame 51 so that screw thread depression bar 53 is to bottom plate 54b
Direction is pressed or away from bottom plate 54b.
Pressing plate 54a is lifted with hand to be made to form space between pressing plate 54a and bottom plate 54b, then by silicon steel strip 6 from unreeling disk 12
Draw and pass through this space in place.Then rotating regulation rotating disk 52 makes screw thread depression bar 53 press pressing plate 54a and press silicon steel strip 6
Tightly.The dynamics of silicon steel strip 6 is compressed by adjusting manually, can be defined by silicon steel strip 6 by smooth by space.
As shown in figure 9, face structure relative with bottom plate 54b pressing plate 54a is identical.From close to silicon steel strip 6 to remote silicon steel strip 6
Plank layer 543, rubber layer 542 and basic unit 541 are followed successively by, and plank layer 543 is fixed on base with rubber layer 542 by screw 544
On layer 541.Basic unit 541 is to be used for the hole of attachment screw 544 on metal material, and plank layer 543 for counter sink.When mounted,
Generally in plank layer 543 outer wrapping, one layer of nylon cloth, to reduce the abrasion that silicon steel strip 6 is produced when by flattening mechanism.
Just to being provided with indent 55 at screw thread depression bar 53 at the top of pressing plate 54a, indent 55 has been embedded in thrust bearing 56, when passing through
When the regulation control screw thread of rotating disk 52 depression bar 53 is pulled down, screw thread depression bar 53 is contradicted on thrust bearing 56.
Embodiment five：
As shown in fig. 6, a kind of winder, the difference with example IV is also to set between flattening mechanism 5 and unreeling structure 1
There is guiding roller 46, be oriented to the two ends of roller 46 and be fixed on by support arm 47 on the supporting leg of the bottom of platen 42.The top of roller 46
Space highly and between pressing plate 54a and bottom plate 54b is contour.
By unreel silicon steel strip 6 that disk 12 draws after being oriented to roller 46 and being oriented to it is straight by flattening mechanism 5, and be difficult
It is flattened the corner part scratch of mechanism 5.
It is oriented to the surface of roller 46 and is bonded with one layer of rubber layer, the friction between guiding roller and silicon steel strip is rubbed for rolling
Wipe.
Embodiment six：
As shown in figure 11, a kind of winder, the difference with embodiment one is that unreeling structure 1 includes base 11 and unreeled
Disk 12.The top of base 11, which is worn, has penetrated unreeling shaft 13, packing ring is provided between unreeling shaft 13 and base 11, so that unreeling shaft 13 and base
11 are brought into close contact fixation.One end of the stretching base 11 of unreeling shaft 13, which is fixed with, unreels disk 12, and the connection of unreeling shaft 13 unreels disk 12
End diameter diminishes, and forms step surface 131.Spine cylinder 14 is set on the less unreeling shaft 13 of diameter, and end face is fitted in platform
On terrace 131.It has been tightly fastened between spine cylinder 14 and unreeling shaft 13 and has unreeled bearing 15.14 surfaces of spine cylinder are evenly distributed with rib, put
The center of reel 12 is provided with the spinous foramen 121 for being used for coordinating spine 14 profiles of cylinder.And unreel when disk 12 is set on spine cylinder 14 and spine cylinder
14 profiles match.
Engage Figure 11 and Figure 13, when unreel disk 12 be set in spine cylinder 14 on when, be highlighted spine cylinder 14 outer surfaces baffle ring 14
Block.
With reference to Figure 11 and Figure 12.When unreel disk 12 be set in spine cylinder 14 on when, the end of unreeling shaft 13 be located at spinous foramen 121 in,
The end of unreeling shaft 13 is provided with screwed hole 132.It is screwed into using the screw rod stretched out in block 16 in unreeling shaft 13.The side of now block 16
Edge and unreel gap is left between disk 12, and be limited to disk 12 is unreeled between the baffle ring 141 of the edge of block 16 and spine cylinder 14.
This specific embodiment is only to explain of the present utility model, and it is not to limitation of the present utility model, ability
Field technique personnel can make the modification without creative contribution to the present embodiment as needed after this specification is read, but
As long as all being protected in right of the present utility model by Patent Law.
Claims (7)
1. a kind of winder with guiding mechanism, including winding mechanism（2）And unreeling structure（1）, the winding mechanism（2）With
In fixing wound block（27）, and drive the winding block（27）Rotate silicon steel strip（6）Wind winding block（27）Upper formation iron
Core, the unreeling structure（1）For fixing silicon steel strip（6）The tep reel being wound in, and with winding mechanism（2）Drive winding block
（27）Rotate, wind silicon steel strip（6）When therewith by silicon steel strip（6）Unreel,
It is characterized in that：Also include guiding mechanism, the guiding mechanism includes being oriented to roller（46）, the guiding roller（46）Two ends
It is fixed on support arm（47）One end, the support arm（47）The other end be fixed on winding mechanism（2）On, and the guiding roller
（46）Residing height and winding block（27）Residing height is identical.
2. the winder according to claim 1 with guiding mechanism, it is characterized in that：The winding mechanism（2）Including volume
Around case（21）, the winding case（21）Side is rotatably connected to for fixing wound block（27）Winding seat（22）, the winding
Seat（22）With motor（7）Drive connection.
3. the winder according to claim 2 with guiding mechanism, it is characterized in that：The winding case（21）On also fix
There is platen（42）, the platen（42）It is less than winding seat in the height of vertical direction（22）The height of in the vertical direction, it is described
Platen（42）The other end stretches to unreeling structure（1）, the platen（42）Stretch to the unreeling structure（1）One end it is solid by supporting leg
Determine on the ground, the support arm（47）It is fixed on the supporting leg.
4. the winder according to claim 3 with guiding mechanism, it is characterized in that：The support arm（47）Pass through at least two
It is individual to be bolted on the supporting leg.
5. the winder according to claim 4 with guiding mechanism, it is characterized in that：The platen（42）Close to the volume
Around seat（22）One end provided be oriented to roller（46）, the guiding roller（46）Two ends are fixed on the platen by angle steel（42）
On.
6. the winder according to claim 5 with guiding mechanism, it is characterized in that：The platen（42）It is fixed on angle bar
One side, the another side of the angle bar is fixed on winding case（21）On.
7. the winder according to claim 1 with guiding mechanism, it is characterized in that：The guiding roller（46）Glue on surface
Have one layer of rubber layer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720137875 | 2017-02-15 | ||
| CN2017201378755 | 2017-02-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206558359U true CN206558359U (en) | 2017-10-13 |
Family
ID=60015656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720302263.7U Expired - Fee Related CN206558359U (en) | 2017-02-15 | 2017-03-24 | Winder with guiding mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206558359U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109108652A (en) * | 2018-09-07 | 2019-01-01 | 江门市德业智能科技有限公司 | Button equipment is beaten in automatic packet rope welding |
| CN111973862A (en) * | 2020-09-24 | 2020-11-24 | 王书萍 | Medical invasive guiding catheter easy to operate |
| CN112908678A (en) * | 2021-03-22 | 2021-06-04 | 保定天威保变电气股份有限公司 | Mold and method for controlling inner diameter of annular transformer core |
-
2017
- 2017-03-24 CN CN201720302263.7U patent/CN206558359U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109108652A (en) * | 2018-09-07 | 2019-01-01 | 江门市德业智能科技有限公司 | Button equipment is beaten in automatic packet rope welding |
| CN109108652B (en) * | 2018-09-07 | 2024-03-19 | 江门市德业智能科技有限公司 | Automatic rope wrapping welding and buckling equipment |
| CN111973862A (en) * | 2020-09-24 | 2020-11-24 | 王书萍 | Medical invasive guiding catheter easy to operate |
| CN112908678A (en) * | 2021-03-22 | 2021-06-04 | 保定天威保变电气股份有限公司 | Mold and method for controlling inner diameter of annular transformer core |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171013 |