CN208600563U - A kind of progressive die of the silicon steel sheet production of fan stator - Google Patents
A kind of progressive die of the silicon steel sheet production of fan stator Download PDFInfo
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- CN208600563U CN208600563U CN201821160293.XU CN201821160293U CN208600563U CN 208600563 U CN208600563 U CN 208600563U CN 201821160293 U CN201821160293 U CN 201821160293U CN 208600563 U CN208600563 U CN 208600563U
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- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 89
- 230000000750 progressive effect Effects 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000004080 punching Methods 0.000 claims abstract description 148
- 239000000463 material Substances 0.000 claims abstract description 41
- 238000000465 moulding Methods 0.000 claims abstract description 15
- 238000005452 bending Methods 0.000 claims description 116
- 238000002788 crimping Methods 0.000 claims description 22
- 238000005520 cutting process Methods 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000739 chaotic effect Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The utility model relates to a kind of progressive dies of the silicon steel sheet production of fan stator, silicon steel sheet includes ontology and the raised line that is formed on ontology, progressive die includes upper die and lower die, progressive die has entrance and exit, the multiple stamping stations for being formed between upper die and lower die and being sequentially distributed along web feed direction, material strip has for the punching portion of silicon steel sheet punching molding and provides the support portion that support is gradually moved in order to material strip for punching portion, material strip is successively by multiple stamping stations and after multiple stamping stations successively receive punching press, punching portion gradually forms silicon steel sheet, after silicon steel sheetmolding, support portion and silicon steel sheet are connected in many places in line, and silicon steel sheet follows support portion to deviate from from the outlet of progressive die.After progressive die is by silicon steel sheet punching molding, silicon steel sheet can't be punched from material strip, that is, each silicon steel sheet is connected on material strip；It avoids causing silicon steel sheet to damage in handling process.
Description
Technical field
The utility model relates to a kind of progressive dies of the silicon steel sheet production of fan stator.
Background technique
Fan stator is the essential element that fan realizes rotation, and the fan of existing a computer CPU radiator fan is fixed
Son, the fan stator include multiple circular silicon steel sheet (see figure 1) being cascading, in the prior art the silicon steel sheet
Production by stamping die punching molding, silicon steel sheet after molding be it is chaotic one by one be deposited in collection device, should
The size relatively small thickness of silicon steel sheet is also very thin, and as can be seen from Figure 1 the circumferential direction of silicon steel sheet is formed with many lesser wedge angles, also
There is a raised line perpendicular to silicon steel sheet body surface, the raised line is thin and thin, easily bending damage, therefore after chaotic stacking,
It can mutually snarl between multiple silicon steel sheets, be separately more troublesome when taking, moreover, after the silicon steel sheet mutually snarled is constantly accumulated
And will lead to the wedge angle of silicon steel sheet, raised line deformation during bringing and taking away, scrap of the product is caused, is wasted extremely serious.
Summary of the invention
Technical problem to be solved in the utility model is the silicon for overcoming the deficiencies of the prior art and provide a kind of fan stator
The progressive die of steel disc production.
In order to solve the above technical problems, the technical solution that the utility model is taken is as follows:
A kind of progressive die of the silicon steel sheet production of fan stator, silicon steel sheet include ontology and are formed in convex on ontology
Item, progressive die include upper die and lower die, and progressive die has entrance and exit, is formed between upper die and lower die and along material strip
Multiple stamping stations that conveying direction is sequentially distributed, material strip have for the punching portion of silicon steel sheet punching molding and mention for punching portion
For supporting the support portion gradually moved in order to material strip, material strip successively pass through multiple stamping stations and multiple stamping stations successively
After receiving punching press, punching portion gradually forms silicon steel sheet, and after silicon steel sheetmolding, support portion and silicon steel sheet are connected in many places in line,
And silicon steel sheet follows support portion to deviate from from the outlet of progressive die.
Preferably, stamping station includes multiple punching stations for punching, the bending station for bending and molding.More
Punching station will not need the excision of the material retained gradually, and the component for needing bending is bent into 90 degree at bending station.
Preferably, punching station includes the first punching station being sequentially distributed along the entrance of progressive die to outlet, second
Punching station, third punching station, the 4th punching station, the 5th punching station, the 6th punching station, bending station are located at the 4th
Between punching station and the 5th punching station.Gradually waste material is cut off at each punching station, to obtain silicon steel sheet needs
Material, in addition, it is because the structure of raised line limits, if will why third punching station and the 4th punching station, which are separately located at,
Third punching station merges with the 4th punching station, while cutting off the waste material of silicon steel sheet periphery, then needs to reserve in incision
The position of raised line, because the material at raised line cannot be removed, then the notch below raised line is too narrow, and notch is easy to cause to break.
Preferably, upper mold, which has, is located at the first punching station, the second punching station, third punching station, the 4th blanker
The first formed punch, the second formed punch, third formed punch, the 4th formed punch, the 5th formed punch at position, the 5th punching station, the 6th punching station,
6th formed punch, lower die is in the first punching station, the second punching station, third punching station, the 4th punching station, the 5th blanker
It is respectively equipped with and the first formed punch, the second formed punch, third formed punch, the 4th formed punch, the 5th formed punch, the 6th at position, the 6th punching station
Formed punch cooperation punching the first notch, the second notch, third notch, the 4th notch, the 5th notch, the 6th notch.Second formed punch tool
There are four, there are two the 4th formed punch tools and shape is different.
Preferably, bending station includes the first bending station and the second bending station, and upper mold, which has, is located at the first bender
The first Bending punch and the second Bending punch at position and the second bending station, lower die is in the first bending station and the second bender
The the first bending mouth and the second bending mouth with the first Bending punch and the cooperation bending of the second Bending punch are respectively equipped at position.First
Bending punch and the first bending mouth, which are used to cooperate, is bent into 45 degree for raised line, and the second Bending punch and the second bending mouth are for cooperating
The raised line for being converted into 45 is bent into 90 degree.
Preferably, there is the haptic element perpendicular to material strip plane, punching station further includes being located at second on the support portion of material strip
The haptic element punching station in the preceding road of punching station, upper mold have the haptic element formed punch being located at haptic element punching station, and lower die is rushed in haptic element
The haptic element notch with the cooperation of haptic element formed punch is provided at cutting position.Haptic element is arranged in two sides, therefore haptic element formed punch, haptic element notch are equal
There are two settings, in addition, haptic element formed punch, haptic element notch are to cut off the part clout on the side of haptic element, the meeting not cut off exists
It goes to cut off by third formed punch and the 4th formed punch at third punching station and the 4th punching station.
Preferably, upper mold also has the at the first bending station and the second bending station first secondary Bending punch and the
Second mate's Bending punch, lower die are equipped with and the first secondary Bending punch and second respectively at the first bending station and the second bending station
The the first secondary bending mouth and the second secondary bending mouth of secondary Bending punch cooperation bending.First secondary Bending punch and the second secondary Bending punch
And first secondary bending mouth and the second secondary bending mouth be to be bent into 90 degree for haptic element to be bent into 45 degree.
Preferably, stamping station further includes the crimping station between the first punching station and haptic element punching station, on
Live conductor protrusion is arranged in mould at crimping station, and lower die is provided with the crimping with crimping male cooperation crimping at crimping station
Slot.The junction of silicon steel sheet and support portion is located in the place of crimping protrusion and pressuring line groove pressing, crimping at this, after being easy for
Continuous worker manually removes silicon steel sheet from support portion.
Preferably, stamping station further includes the pressure segment difference station set on road after bending station, and upper mold, which has, is located at pressure segment difference
Boss punching at station, lower die are equipped with groove at pressure segment difference station, and the support portion on material strip is pressed downward to groove by boss punching
In, and then silicon steel sheet ontology and support portion in punching portion is made to form segment difference in above-below direction.
Preferably, stamping station further includes the station that punctures positioned at the first preceding road of bending station, and upper mold, which has to be located at, to be punctured
Formed punch is punctured at station, and lower die punctures notch with puncture that formed punch cooperation punctures puncturing station and be equipped with.By puncturing formed punch
With puncture notch, the connection between raised line and silicon steel sheet ontology can be reduced, convenient for it is subsequent to raised line bending and molding to 90 degree.
Due to the implementation of above technical scheme, the utility model has the advantages that compared with prior art
Silicon steel sheet, is punched by the progressive die of the silicon steel sheet production of the fan stator of the utility model in progressive die
After type, silicon steel sheet can't be punched from material strip and (material strip be divided into punching portion and support portion, punching portion is for rushing
It is cut into type silicon steel sheet, is connected with support portion in line everywhere after silicon steel sheetmolding is completed), that is, each silicon steel sheet is connected to material
It takes, when use only needs worker to remove from material strip by silicon steel sheet manually, and the silicon steel sheet of batch is avoided to rush from mold
It is mutually accumulated after scaling off when collecting, causes the case where being squeezed and deformed.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the silicon steel sheet of the utility model；
For the silicon steel sheet schematic perspective view after the progressive die production of the utility model, (silicon steel sheet is mounted in branch to Fig. 2
On support part)；
Fig. 3 is the step by step structure schematic diagram of the progressive die of the utility model；
Wherein: a1, the first punching station；A2, the second punching station；A3, third punching station；A4, the 4th punching station；
A5, the 5th punching station；A6, the 6th punching station；B1, crimping station；B2, haptic element punching station；B3, station is punctured；B4,
One bending station；B5, the second bending station；B6, pressure segment difference station；C1, the first formed punch；C2, the second formed punch；C3, third formed punch；
C4, the 4th formed punch；C5, the 5th formed punch；C6, the 6th formed punch；Z1, crimping protrusion；Z2, haptic element formed punch；Z3, formed punch is punctured；Z4,
One Bending punch；Z5, the second Bending punch；Z6, boss punching；X1, the first secondary Bending punch；X2, the second secondary Bending punch；101,
Ontology；102, raised line；200, support portion；201, haptic element.
Specific embodiment
The utility model is described in more detail with specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of progressive die of the silicon steel sheet production of fan stator, silicon steel sheet include ontology
101 and the raised line 102 that is formed on ontology 101, progressive die includes upper die and lower die, progressive die have entrance and exit,
It is formed between upper die and lower die and along multiple stamping stations that web feed direction is sequentially distributed, material strip, which has, is used for silicon steel sheet
The punching portion of punching molding and the support portion 200 that support is gradually moved in order to material strip is provided for punching portion, material strip successively passes through
Multiple stamping stations and after multiple stamping stations successively receive punching press, punching portion gradually forms silicon steel sheet, when silicon steel sheetmolding
Afterwards, support portion 200 and silicon steel sheet are connected in many places in line, and silicon steel sheet follows support portion 200 to deviate from from the outlet of progressive die.
Specifically, stamping station includes multiple punching stations for punching, the bending station for bending and molding.More
Punching station will not need the excision of the material retained gradually, the component of bending will be needed (including silicon steel sheet at bending station
The haptic element 201 for protecting raised line 102 not to be damaged on raised line 102 and material strip) it is bent into 90 degree.Punching station includes along grade
The first punching station a1, the second punching station a2, the third punching station a3, the 4th that the entrance of progressive die tool is sequentially distributed to outlet
Punching station a4, the 5th punching station a5, the 6th punching station a6, bending station are located at the punching of the 4th punching station a4 and the 5th
Between station a5.Gradually waste material is cut off at each punching station, to obtain the material of silicon steel sheet needs, in addition, third is rushed
It is because the structure of raised line 102 limits, if third is punched why cutting position a3 and the 4th punching station a4, which is separately located at,
Station a3 merges with the 4th punching station a4, while cutting off the waste material of silicon steel sheet periphery, then needs to reserve raised line in incision
102 position, because the material at raised line 102 cannot be removed, then the notch of 102 lower section of raised line is too narrow, and notch is easy to cause to collapse
It is disconnected.Upper mold has positioned at the first punching station a1, the second punching station a2, third punching station a3, the 4th punching station a4, the
The first formed punch c1, the second formed punch c2, third formed punch c3, the 4th formed punch c4 at five punching station a5, the 6th punching station a6,
Five formed punch c5, the 6th formed punch c6, lower die is in the first punching station a1, the second punching station a2, third punching station a3, the 4th punching
Cutting position a4, the 5th punching station a5, it is respectively equipped with and the first formed punch c1, the second formed punch c2, third at the 6th punching station a6
Formed punch c3, the 4th formed punch c4, the 5th formed punch c5, the first notch of the 6th formed punch c6 cooperation punching, the second notch, third notch, the
Four notch, the 5th notch, the 6th notch.There are four second formed punch c2 tools, and there are two the 4th formed punch c4 tools and shape is different.
Further, bending station includes the first bending station b4 and the second bending station b5, and upper mold, which has, is located at first
The first Bending punch z4 and the second Bending punch z5 at bending station b4 and the second bending station b5, lower die is in the first bender
First with the first Bending punch z4 and the second Bending punch z5 cooperation bending is respectively equipped at the b4 and the second bending station b5 of position
Bending mouth and the second bending mouth.Raised line 102 is bent into 45 degree for cooperating by the first Bending punch z4 and the first bending mouth, and second
Bending punch z5 and the second bending mouth are used to cooperate that the raised line 102 for being converted into 45 to be bent into 90 degree.In the first bending in this example
The preceding road station b4, which is additionally provided with, punctures station b3, and upper mold, which has to be located to puncture, punctures formed punch z3 at station b3, and lower die is puncturing work
Position b3 be equipped with puncture formed punch z3 cooperation puncture puncture notch.It, can be by raised line 102 by puncturing formed punch z3 and puncturing notch
Connection between silicon steel sheet ontology 101 is reduced, convenient for it is subsequent to 102 bending and molding of raised line to 90 degree.In addition, the support of material strip
There is the haptic element 201 perpendicular to material strip plane, punching station further includes the haptic element positioned at the second preceding road punching station a2 in portion 200
201 punching station b2, upper mold have the 201 formed punch z2 of haptic element being located at 201 punching station b2 of haptic element, and lower die is rushed in haptic element 201
201 notch of haptic element with 201 formed punch z2 of haptic element cooperation is provided at the b2 of cutting position.Haptic element 201 is arranged in two sides, therefore haptic element
There are two 201 formed punch z2,201 notch of haptic element are respectively provided with, in addition, 201 formed punch z2 of haptic element, 201 notch of haptic element are only by haptic element 201
Side part clout excision, the meeting not cut off is at third punching station a3 and the 4th punching station a4 by third formed punch c3
It goes to cut off with the 4th formed punch c4.Upper mold also has the at the first bending station b4 and the second bending station b5 first secondary bending
The secondary Bending punch x2 of formed punch x1 and second, lower die are respectively equipped with and first at the first bending station b4 and the second bending station b5
The pair Bending punch x2 of secondary Bending punch x1 and second cooperates the first secondary bending mouth and the second secondary bending mouth of bending.First secondary bending
The secondary bending mouth of the pair Bending punch x2 of formed punch x1 and second and first and the second secondary bending mouth are for haptic element 201 to be bent into 45
Degree is being bent into 90 degree.
In this example, stamping station further includes the crimping between 201 punching station b2 of the first punching station a1 and haptic element
Live conductor protrusion z1 is arranged in station b1, upper mold at crimping station b1, and lower die is provided with and crimping protrusion at crimping station b1
The pressuring line groove of z1 cooperation crimping.The junction of silicon steel sheet and support portion 200 is located in the ground of crimping protrusion z1 and pressuring line groove pressing
Side, crimping at this are easy for subsequent worker and manually remove silicon steel sheet from support portion 200.Stamping station further includes being set to
There is the boss being located at pressure segment difference station b6 to rush z6 for the pressure segment difference station b6 in road after bending station, upper mold, and lower die is in pressure segment difference
Groove is equipped at station b6, boss rushes z6 and presses downward to the support portion 200 on material strip in groove, and then makes the silicon in punching portion
Steel disc ontology 101 and support portion 200 form segment difference in above-below direction.Boss rushes z6, groove there are two being respectively arranged on two sides,
Two sides push support portion 200, and silicon steel sheet ontology 101 and support portion 200 is made to form segment difference, due to haptic element 201 height with it is convex
The height of item 102 is equal, in order to preferably enable haptic element 201 protect raised line 102 not by external force touching (raised line 102 is touched,
Then will receive external force can bend deformation), after pressing on silicon steel sheet, silicon steel sheet then forms segment difference with material strip, so that haptic element 201
It then will form segment difference with raised line 102, so that raised line 102 be avoided to be damaged.
In conclusion the progressive die of the silicon steel sheet production of the fan stator of the utility model, in progressive die by silicon
After steel disc punching molding, silicon steel sheet can't be punched from material strip and (material strip be divided into punching portion and support portion, is rushed
Portion is cut for punching molding silicon steel sheet, is connected with support portion in line everywhere after silicon steel sheetmolding is completed), that is, each silicon steel sheet
It is all connected on material strip, when use only needs worker to remove from material strip by silicon steel sheet manually, avoids the silicon steel of batch
Piece from mold be punched after collect when mutually accumulate, cause the case where being squeezed and deformed；In addition, injection mold is rushing
While being cut into type silicon steel sheet, molding is punched out to the support portion of material strip, and form haptic element, and by silicon steel sheet and support portion it
Between form segment difference, make haptic element height be higher than raised line, to enable haptic element effective protection raised line be not under compression change during collection
Shape further increases the protection to raised line.
The utility model is described in detail above, its object is to allow the personage for being familiar with this field technology can be much of that
It solves the content of the utility model and is implemented, do not limit the protection scope of the present invention, it is all practical according to this
Equivalent change or modification made by novel Spirit Essence should all cover within the protection scope of the present utility model.
Claims (10)
1. a kind of progressive die of the silicon steel sheet production of fan stator, the silicon steel sheet includes ontology and is formed in the ontology
On raised line, the progressive die includes upper die and lower die, the progressive die have entrance and exit, be formed in the upper mold
The multiple stamping stations being sequentially distributed between lower die and along web feed direction, it is characterised in that: the material strip, which has, to be used for
The punching portion of the silicon steel sheet punching molding and the support portion that support is gradually moved in order to material strip, institute are provided for the punching portion
State material strip successively by multiple stamping stations and after multiple stamping stations successively receive punching press, the punching portion by
Silicon steel sheet described in one-step forming, after the silicon steel sheetmolding, the support portion is connect in many places in line with the silicon steel sheet, and institute
Stating silicon steel sheet follows the support portion to deviate from from the outlet of the progressive die.
2. the progressive die of the silicon steel sheet production of fan stator according to claim 1, it is characterised in that: the punching press
Station includes multiple punching stations for punching, the bending station for bending and molding.
3. the progressive die of the silicon steel sheet production of fan stator according to claim 2, it is characterised in that: the punching
Station includes the first punching station, the second punching station, third punching being sequentially distributed along the entrance of the progressive die to outlet
Cutting position, the 4th punching station, the 5th punching station, the 6th punching station, the bending station are located at the 4th blanker
Between position and the 5th punching station.
4. the progressive die of the silicon steel sheet production of fan stator according to claim 3, it is characterised in that: the upper mold
Be located at first punching station, the second punching station, third punching station, the 4th punching station, the 5th punching station,
The first formed punch, the second formed punch, third formed punch, the 4th formed punch, the 5th formed punch, the 6th formed punch at 6th punching station, under described
Mould is in first punching station, the second punching station, third punching station, the 4th punching station, the 5th punching station, the 6th
It is respectively equipped at punching station and first formed punch, the second formed punch, third formed punch, the 4th formed punch, the 5th formed punch, the 6th formed punch
Cooperation punching the first notch, the second notch, third notch, the 4th notch, the 5th notch, the 6th notch.
5. the progressive die of the silicon steel sheet production of fan stator according to claim 4, it is characterised in that: the bending
Station includes the first bending station and the second bending station, and the upper mold, which has, is located at the first bending station and the second bending
The first Bending punch and the second Bending punch at station, the lower die is at the first bending station and the second bending station
It is respectively equipped with the first bending mouth and the second bending mouth with first Bending punch and the cooperation bending of the second Bending punch.
6. the progressive die of the silicon steel sheet production of fan stator according to claim 5, it is characterised in that: the material strip
Support portion on have perpendicular to material strip plane haptic element, the punching station further include be located at the preceding road of the second punching station
Haptic element punching station, the upper mold have be located at the haptic element punching station at haptic element formed punch, the lower die is in the touching
The haptic element notch with haptic element formed punch cooperation is provided at foot punching station.
7. the progressive die of the silicon steel sheet production of fan stator according to claim 6, it is characterised in that: the upper mold
Also there is the at the first bending station and the second bending station first secondary Bending punch and the second secondary Bending punch, institute
Lower die is stated to be equipped with respectively at the first bending station and the second bending station and the described first secondary Bending punch and the second pair
Bending punch cooperates the first secondary bending mouth and the second secondary bending mouth of bending.
8. the progressive die of the silicon steel sheet production of fan stator according to claim 6, it is characterised in that: the punching press
Station further includes the crimping station between first punching station and the haptic element punching station, and the upper mold is described
Live conductor protrusion is set at crimping station, and the lower die is provided with and the crimping male cooperation crimping at the crimping station
Pressuring line groove.
9. the progressive die of the silicon steel sheet production of fan stator according to claim 4, it is characterised in that: the punching press
Station further includes the pressure segment difference station set on road after the bending station, and the upper mold, which has, to be located at the pressure segment difference station
Boss punching, the lower die are equipped with groove at the pressure segment difference station, and the boss punching presses downward to the support portion on material strip
In the groove, and then silicon steel sheet ontology and support portion in punching portion is made to form segment difference in above-below direction.
10. the progressive die of the silicon steel sheet production of fan stator according to claim 5, it is characterised in that: the punching
Pressure station further includes the station that punctures positioned at the preceding road of the first bending station, and the upper mold, which has, is located at described puncture at station
Puncture formed punch, the lower die it is described puncture station be equipped with it is described puncture that formed punch cooperation punctures puncture notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821160293.XU CN208600563U (en) | 2018-07-20 | 2018-07-20 | A kind of progressive die of the silicon steel sheet production of fan stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821160293.XU CN208600563U (en) | 2018-07-20 | 2018-07-20 | A kind of progressive die of the silicon steel sheet production of fan stator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208600563U true CN208600563U (en) | 2019-03-15 |
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ID=65669838
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821160293.XU Expired - Fee Related CN208600563U (en) | 2018-07-20 | 2018-07-20 | A kind of progressive die of the silicon steel sheet production of fan stator |
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| Country | Link |
|---|---|
| CN (1) | CN208600563U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894520A (en) * | 2019-03-22 | 2019-06-18 | 江阴市南闸中天电器有限公司 | A kind of tinertoy formula silicon steel sheet and production method |
-
2018
- 2018-07-20 CN CN201821160293.XU patent/CN208600563U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894520A (en) * | 2019-03-22 | 2019-06-18 | 江阴市南闸中天电器有限公司 | A kind of tinertoy formula silicon steel sheet and production method |
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