CN108717899A - A kind of efficient pressure setting of silicon steel sheet with defencive function - Google Patents
A kind of efficient pressure setting of silicon steel sheet with defencive function Download PDFInfo
- Publication number
- CN108717899A CN108717899A CN201811002016.0A CN201811002016A CN108717899A CN 108717899 A CN108717899 A CN 108717899A CN 201811002016 A CN201811002016 A CN 201811002016A CN 108717899 A CN108717899 A CN 108717899A
- Authority
- CN
- China
- Prior art keywords
- steel sheet
- silicon steel
- fixed
- limiting slot
- defencive function
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 48
- 230000007246 mechanism Effects 0.000 claims abstract description 41
- 230000001681 protective effect Effects 0.000 claims abstract description 17
- 230000003028 elevating effect Effects 0.000 claims abstract description 15
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000007906 compression Methods 0.000 claims abstract description 14
- 238000005192 partition Methods 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0233—Manufacturing of magnetic circuits made from sheets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention discloses a kind of efficient pressure settings of the silicon steel sheet with defencive function, are related to silicon steel sheet pressure setting technical field.The present invention includes bottom plate and support column; it is fixed with elevating mechanism at the top of support column; it is fixed with support plate at the top of elevating mechanism; it is fixed with hydraulic mechanism at the top of support plate; hydraulic mechanism compression bar bottom end is fixed with pressure head; it is fixed with protective device at the top of bottom plate, protective device top movable is combined with limiting slot, and limiting slot top movable is combined with splicing slot.The present invention is by automatically positioning the silicon steel sheet of compacting; avoid artificial hand steered positioning; improve positioning accuracy; alleviate the amount of labour of worker; the compacting quality of silicon steel sheet is improved simultaneously; the life safety of the worker of guarantee, the use of protective device so that the case where silicon steel sheet damage is avoided the occurrence of when suppressing silicon steel sheet.
Description
Technical field
The invention belongs to silicon steel sheet pressure setting technical fields, high more particularly to a kind of silicon steel sheet with defencive function
Imitate pressure setting.
Background technology
Silicon steel sheet is a kind of carbon containing extremely low silicon-iron soft magnetic alloy, for making iron core in electric welding machine.The work of silicon steel sheet
Magnetic flux is formed with being fixed coil and magnetic conduction, so the linking between two sections of silicon steel sheets needs closely.Between silicon steel sheet
If linking defective tightness can influence flux interaction, reduce
In operation, using artificially less important work, when tabletting, needs master worker to use to existing silicon steel sheet pressure setting
Hand steered firmly silicon steel sheet carries out the adjustment of position, then reuses sheeting equipment and carries out tabletting, if the position that silicon steel sheet is placed does not conform to
It is suitable, silicon steel sheet position can not be adjusted in pressing process again, slightly deviation can cause entire silicon steel sheet damage to scrap and can not use；People
The auxiliary compacting silicon steel sheet labor intensity of work is big, and buttresses silicon steel sheet manually there is also sheeting equipments and be pressed onto work in tabletting
The hidden danger of the hand of people master worker.
Invention content
The purpose of the present invention is to provide a kind of efficient pressure settings of the silicon steel sheet with defencive function, a kind of by designing
It does not need hand steered, automatic positioning and can ensure the device that silicon steel sheet will not damage by pressure, solve existing silicon steel sheet in compacting
Artificial hand steered less important work is needed, needs constantly to notice that the adjustment of position, low production efficiency are easy to damage silicon steel by pressure in pressing process
There is security risk in piece.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions：
The present invention is a kind of efficient pressure setting of silicon steel sheet with defencive function, including bottom plate and support column, the bottom
Plate upper surface is fixedly connected with support column bottom end, and elevating mechanism is fixed at the top of the support column, and the elevating mechanism top is solid
Surely there is support plate, hydraulic mechanism is fixed at the top of the support plate, the compression bar of the hydraulic mechanism through support plate and extends to
Support plate bottom, hydraulic mechanism compression bar bottom end are fixed with pressure head.
It is fixed with protective device at the top of the bottom plate, the protective device top movable is combined with limiting slot, the limit
Slot top movable is combined with splicing slot.
The protective device includes fixing groove, and cylinder, the push rod of the cylinder and limit are fixed with inside the fixing groove
Trench bottom activity coordinates, and the bottom of the fixing groove inner wall is fixed with buffer spring, and partition board is fixed at the top of the buffer spring,
Limit switches are fixed in the bottom of the fixing groove inner wall by supporting rod.
Further, one surface of the support column is fixed with controller, the limit switch, elevating mechanism, cylinder and liquid
Press mechanism is electrically connected with controller.
Further, the limit trench bottom offers and the matched circular hole of cylinder push-rod, the limiting slot top end
Face offers mounting hole.
Further, the splicing trench bottom be provided with the matched straight pin of mounting hole, the splicing groove top portion opens
Equipped with the matched jack of straight pin.
Further, the limiting slot is identical with link slot integral channel structure, the limiting slot and link slot interior groove
Road is " E " shape structure or "u"-shaped, and the pressure head structure is identical as limiting slot and splicing slot integral channel structure.
Further, the partition board bottom and fixing groove inner wall bottom are both provided with and the matched limit of buffer spring
Ring.
Further, it is fixed at the top of the pressure head and passes through with the matched thread bush of hydraulic mechanism compression bar, the pressure head
Thread bush is threadedly coupled with the compression bar of hydraulic mechanism.
Further, the elevating mechanism is hydraulic stem or electric hydaulic mechanism.
Further, the partition board is convex shape structure, is extended to inside limiting slot at the top of the partition board, the partition board
Both sides are slidably matched with fixing groove inner wall.
The invention has the advantages that：
1, the present invention avoids artificial hand steered positioning, improves positioning by being positioned automatically to the silicon steel sheet of compacting
Precision, alleviates the amount of labour of worker, while improving the compacting quality of silicon steel sheet, the life safety of the worker of guarantee, protection
The use of device so that the case where silicon steel sheet damage is avoided the occurrence of when suppressing silicon steel sheet.
2, by the present invention in that with the limiting slots of different conduits and splicing slot so that the silicon steel sheet pressure setting can be suppressed
Different types of silicon steel sheet improves the scope of application of the device, reduces production cost.
3, the present invention is by the use of cylinder and limiting slot in protective device, can facilitate after the completion of compacting taking-up at
Product improve work efficiency, and reduce labor intensity.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the structural schematic diagram for the efficient pressure setting of silicon steel sheet that the present invention has defencive function；
Fig. 2 is the front view of Fig. 1；
Fig. 3 is the structural schematic diagram of protective device of the present invention；
Fig. 4 is the structural schematic diagram of limiting slot of the present invention；
Fig. 5 is the structural schematic diagram of present invention limit trench bottom；
Fig. 6 is the structural schematic diagram of present invention splicing slot；
In attached drawing, parts list represented by the reference numerals are as follows：
1- bottom plates, 2- support columns, 3- elevating mechanisms, 4- support plates, 5- hydraulic mechanisms, 6- pressure heads, 7- protective devices, 701-
Fixing groove, 702- cylinders, 703- buffer springs, 704- partition boards, 705- limit switches, 8- limiting slots, 801- circular holes, 802- are fixed
Hole, 9- splice slot, 901- straight pins, 902- jacks, 10- controllers.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
It please refers to Fig.1 shown in -6, the present invention is a kind of efficient pressure setting of silicon steel sheet with defencive function, including bottom plate
1 and support column 2,1 upper surface of bottom plate be fixedly connected with 2 bottom end of support column, the top of support column 2 is fixed with elevating mechanism 3, elevator
Structure 3 adjusts the distance between support plate 4 and splicing slot 9 according to the height of the silicon steel sheet to be suppressed, and 3 top of elevating mechanism is fixed with
Support plate 4,4 top of support plate are fixed with hydraulic mechanism 5, and the compression bar of hydraulic mechanism 5 through support plate 4 and extends to support plate 4
Bottom, 5 compression bar bottom end of hydraulic mechanism are fixed with pressure head 6.
1 top of bottom plate is fixed with protective device 7, and 7 top movable of protective device is combined with limiting slot 8, and 8 top of limiting slot is living
It is dynamic to be combined with splicing slot 9.
Protective device 7 includes fixing groove 701, and cylinder 702, the push rod of cylinder 702 and limit are fixed with inside fixing groove 701
8 bottom activity cooperation of slot, the bottom of 701 inner wall of fixing groove are fixed with buffer spring 703,703 top of buffer spring be fixed with every
Limit switches 705 are fixed in the bottom of plate 704,701 inner wall of fixing groove by supporting rod.
Wherein, 2 one surface of support column is fixed with controller 10, limit switch 705, elevating mechanism 3, cylinder 702 and hydraulic pressure
Mechanism 5 is electrically connected with controller 10, and controller 10 is electrically connected by conducting wire and external power.
Wherein, 8 bottom of limiting slot is offered opens with the matched circular hole 801 of 702 push rod of cylinder, 8 top end surface of limiting slot
Equipped with mounting hole 802.
Wherein, 9 bottom of splicing slot is provided with offers with 802 matched straight pin 901 of mounting hole, 9 top of splicing slot
With 901 matched jack 902 of straight pin.
Wherein, limiting slot 8 is identical with 9 integral channel structure of link slot, and limiting slot 8 and 9 integral channel of link slot are " E " shape
Structure or "u"-shaped, 6 structure of pressure head are identical as limiting slot 8 and splicing 9 integral channel structure of slot.
Wherein, 704 bottom of partition board and 701 inner wall bottom of fixing groove are both provided with and 703 matched limit of buffer spring
Ring.
Wherein, 6 top of pressure head is fixed with passes through thread bush and liquid with the matched thread bush of 5 compression bar of hydraulic mechanism, pressure head 6
The compression bar of press mechanism 5 is threadedly coupled, and is convenient for changing pressure head 6.
Wherein, elevating mechanism 3 is hydraulic stem or electric hydaulic mechanism.
Wherein, partition board 704 is convex shape structure, and the top of partition board 704 extends to inside limiting slot 8,704 both sides of partition board with
701 inner wall of fixing groove is slidably matched.
One of the present embodiment has particular application as：In use, protective device 7 is bolted on bottom plate 1, pass through
The push rod of cylinder 702 coordinates with the circular hole 801 on limiting slot 8, selects limiting slot 8 according to the shape of the silicon steel sheet to be suppressed and spells
Limiting slot 8 is connect by access slot 9 with protective device 7, then in 8 top end surface of limiting slot, is selected according to the height of silicon steel sheet to be suppressed
The number for placing splicing slot 9 is selected, after the completion again fixes pressure head 6 and the compression bar in hydraulic mechanism 5, silicon is placed in limiting slot 8
Steel disc is moved with dynamic head 6 by 10 hydraulic mechanism 5 processed of controller control, completes the compacting to silicon steel sheet, after the completion of compacting, led to
It crosses controller 10 and controls the drive rising of limiting slot 8 of cylinder 702, facilitate and take out the silicon steel sheet that compacting is completed.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the present invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably explain the present invention
Principle and practical application, to enable skilled artisan to be best understood by and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (9)
1. a kind of efficient pressure setting of silicon steel sheet with defencive function, including bottom plate (1) and support column (2), it is characterised in that：
Bottom plate (1) upper surface is fixedly connected with support column (2) bottom end, and elevating mechanism is fixed at the top of the support column (2)
(3), it is fixed with support plate (4) at the top of the elevating mechanism (3), hydraulic mechanism (5), institute are fixed at the top of the support plate (4)
The compression bar of hydraulic mechanism (5) is stated through support plate (4) and extends to support plate (4) bottom, hydraulic mechanism (5) the compression bar bottom end
It is fixed with pressure head (6)；
It is fixed with protective device (7) at the top of the bottom plate (1), protective device (7) top movable is combined with limiting slot (8),
Limiting slot (8) top movable is combined with splicing slot (9)；
The protective device (7) includes fixing groove (701), and cylinder (702), the gas are fixed with inside the fixing groove (701)
The push rod of cylinder (702) coordinates with the activity of limiting slot (8) bottom, and the bottom of fixing groove (701) inner wall is fixed with buffer spring
(703), it is fixed with partition board (704) at the top of the buffer spring (703), the bottom of fixing groove (701) inner wall passes through support
Bar fixes limit switches (705).
2. the efficient pressure setting of a kind of silicon steel sheet with defencive function according to claim 1, which is characterized in that described
(2) one surface of support column is fixed with controller (10), the limit switch (705), elevating mechanism (3), cylinder (702) and hydraulic pressure
Mechanism (5) is electrically connected with controller (10).
3. the efficient pressure setting of a kind of silicon steel sheet with defencive function according to claim 1, which is characterized in that described
Limiting slot (8) bottom is offered to be opened up with the matched circular hole of cylinder (702) push rod (801), limiting slot (8) top end surface
There is mounting hole (802).
4. the efficient pressure setting of a kind of silicon steel sheet with defencive function according to claim 1, which is characterized in that described
Splicing slot (9) bottom be provided with mounting hole (802) matched straight pin (901), offer at the top of the splicing slot (9) and
Straight pin (901) matched jack (902).
5. the efficient pressure setting of a kind of silicon steel sheet with defencive function according to claim 1, which is characterized in that described
Limiting slot (8) is identical with link slot (9) integral channel structure, and the limiting slot (8) and link slot (9) integral channel are " E " shape
Structure or "u"-shaped, pressure head (6) structure are identical as limiting slot (8) and splicing slot (9) integral channel structure.
6. the efficient pressure setting of a kind of silicon steel sheet with defencive function according to claim 1, which is characterized in that described
Partition board (704) bottom and fixing groove (701) inner wall bottom are both provided with and buffer spring (703) matched spacing ring.
7. the efficient pressure setting of a kind of silicon steel sheet with defencive function according to claim 1, which is characterized in that described
It is fixed at the top of pressure head (6) and passes through thread bush and hydraulic pressure with the matched thread bush of hydraulic mechanism (5) compression bar, the pressure head (6)
The compression bar of mechanism (5) is threadedly coupled.
8. the efficient pressure setting of a kind of silicon steel sheet with defencive function according to claim 1, which is characterized in that described
Elevating mechanism (3) is hydraulic stem or electric hydaulic mechanism.
9. the efficient pressure setting of a kind of silicon steel sheet with defencive function according to claim 1, which is characterized in that described
Partition board (704) is convex shape structure, and limiting slot (8) inside, the partition board (704) two are extended at the top of the partition board (704)
Side is slidably matched with fixing groove (701) inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811002016.0A CN108717899B (en) | 2018-08-30 | 2018-08-30 | High-efficient suppression device of blade of silicon steel with protect function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811002016.0A CN108717899B (en) | 2018-08-30 | 2018-08-30 | High-efficient suppression device of blade of silicon steel with protect function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108717899A true CN108717899A (en) | 2018-10-30 |
| CN108717899B CN108717899B (en) | 2023-12-08 |
Family
ID=63914456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811002016.0A Active CN108717899B (en) | 2018-08-30 | 2018-08-30 | High-efficient suppression device of blade of silicon steel with protect function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108717899B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364349A (en) * | 2019-04-10 | 2019-10-22 | 四川德华电气有限责任公司 | Transformer iron-core piece stacking mechanism, device and laminating machine |
| CN111223658A (en) * | 2020-03-13 | 2020-06-02 | 镇江市高等专科学校 | Pressing device of silicon steel sheet for electric welding machine |
| CN115365438A (en) * | 2022-10-25 | 2022-11-22 | 南通双耀冲压有限公司 | Intelligent silicon steel sheet forging machine |
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|---|---|---|---|---|
| US20090040002A1 (en) * | 2005-04-12 | 2009-02-12 | Myung-Dae Kim | Iron Core, Mold and Method of Forming and Laminating the Same |
| JP3200040U (en) * | 2015-07-10 | 2015-10-01 | 銘建精機股▲フン▼有限公司 | Silicon steel plate progressive press |
| CN107790909A (en) * | 2016-08-30 | 2018-03-13 | 昆山利玛赫自动化科技有限公司 | Silicon steel sheet high-precision automatic welder |
| CN107803429A (en) * | 2017-11-21 | 2018-03-16 | 昆山普克特金属制品有限公司 | A kind of stabilization metal stamping device |
| CN207409378U (en) * | 2017-07-20 | 2018-05-25 | 吴忠市中心电焊机有限公司 | A kind of pressure setting of electric welding machine silicon steel sheet |
-
2018
- 2018-08-30 CN CN201811002016.0A patent/CN108717899B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090040002A1 (en) * | 2005-04-12 | 2009-02-12 | Myung-Dae Kim | Iron Core, Mold and Method of Forming and Laminating the Same |
| JP3200040U (en) * | 2015-07-10 | 2015-10-01 | 銘建精機股▲フン▼有限公司 | Silicon steel plate progressive press |
| CN107790909A (en) * | 2016-08-30 | 2018-03-13 | 昆山利玛赫自动化科技有限公司 | Silicon steel sheet high-precision automatic welder |
| CN207409378U (en) * | 2017-07-20 | 2018-05-25 | 吴忠市中心电焊机有限公司 | A kind of pressure setting of electric welding machine silicon steel sheet |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364349A (en) * | 2019-04-10 | 2019-10-22 | 四川德华电气有限责任公司 | Transformer iron-core piece stacking mechanism, device and laminating machine |
| CN110364349B (en) * | 2019-04-10 | 2021-07-16 | 四川德华电气有限责任公司 | Transformer iron core chip lamination mechanism, device and lamination machine |
| CN111223658A (en) * | 2020-03-13 | 2020-06-02 | 镇江市高等专科学校 | Pressing device of silicon steel sheet for electric welding machine |
| CN111223658B (en) * | 2020-03-13 | 2024-05-31 | 镇江市高等专科学校 | Pressing device for silicon steel sheet for electric welding machine |
| CN115365438A (en) * | 2022-10-25 | 2022-11-22 | 南通双耀冲压有限公司 | Intelligent silicon steel sheet forging machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108717899B (en) | 2023-12-08 |
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