CN104107909A - Forming method for hollow cylindrical rare-earth magnetic steel compacts - Google Patents
Forming method for hollow cylindrical rare-earth magnetic steel compacts Download PDFInfo
- Publication number
- CN104107909A CN104107909A CN201410346968.XA CN201410346968A CN104107909A CN 104107909 A CN104107909 A CN 104107909A CN 201410346968 A CN201410346968 A CN 201410346968A CN 104107909 A CN104107909 A CN 104107909A
- Authority
- CN
- China
- Prior art keywords
- pressed compact
- magnetic steel
- earth magnetic
- forming method
- compacts
- 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
Abstract
The invention discloses a forming method for hollow cylindrical rare-earth magnetic steel compacts. The forming method includes the step of providing a die, wherein the die comprises a magnet conducting plate, clamp plates, a support and a plurality of forming cores, and an upper die cavity is formed in the die; loading powder materials into the upper die cavity; placing an upper punch into the upper die cavity for pressing so as to form upper half compacts; overturning the die to enable the upper die punch to face downwards, and taking out the support to form a lower die cavity; loading the powder materials into the lower die cavity; loading a lower die punch into the lower die cavity for pressing so as to form lower half compacts; detaching the magnet conducting plate, the clamp plates, the upper die punch and the lower die punch for isostatic pressing; after isostatic pressing, taking out the forming cores among the upper half compacts and the lower half compacts to form a plurality of hollow cylindrical rare-earth magnetic steel compacts. The forming method for the hollow cylindrical rare-earth magnetic steel compacts has the advantages of low feeding capacity, high production efficiency, low cost and direct forming, and the technical problems of large feeding capacity, low production efficiency and high cost are solved.
Description
Technical field
The present invention relates to neodymium iron boron manufacture field, particularly a kind of forming method of hollow cylinder Nd-Fe-B magnet steel pressed compact.
Background technology
At present, the method of known production sintered NdFeB hollow cylinder rare earth magnetic steel is first to determine blank dimension according to order size and mill allowance, design, manufactured mould according to known shrinkage ratio, then pack powder into die cavity, by compacting, etc. static pressure, fire rear formation cylinder blank, pass through again machined cylindrical grinding, draw hole, form hollow cylinder rare earth magnetic steel finished product.The problem that the method exists: inventory is large, and production efficiency is low, and cost is high.
The information that is disclosed in this background technology part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply that in any form this information structure has been the known prior art of persons skilled in the art.
Summary of the invention
The object of the present invention is to provide a kind of method of straight forming hollow cylinder Nd-Fe-B magnet steel pressed compact, to solve the technical barrier that existing method inventory is large, production efficiency is low, cost is high.
For achieving the above object, the invention provides a kind of forming method of hollow cylinder rare earth magnetic steel pressed compact, comprise the steps: that a. provides mould, mould comprises magnetic conductive board, clamping plate, support, multiple core, and mould is formed with upper cavity; B. powder is packed in upper cavity; C. upper punch is packed in upper cavity and suppressed, thereby form first half pressed compact; D. turnover mould, makes upper punch down, takes out support, and then forms lower mode cavity; E. powder is packed in lower mode cavity; F. bottom punch is packed in lower mode cavity and suppressed, thereby form Lower Half pressed compact; G. dismantle magnetic conductive board, clamping plate, upper punch and bottom punch, wait static pressure; H. after waiting static pressure, take out the multiple cores between first half pressed compact and Lower Half pressed compact, thereby form multiple hollow cylinder rare earth magnetic steel pressed compacts.
Preferably, in technique scheme, offer the semicircular opening identical with the radius of multiple cores on support, in the time carrying out above-mentioned steps a, multiple cores are positioned in the semicircular opening of support.
Preferably, in technique scheme, powder is neodymium iron boron powder.
Compared with prior art, the present invention has following beneficial effect:
Of the present invention method is simple, and inventory is few, production efficiency is high, cost is low; Straight forming hollow cylinder rare earth magnetic steel pressed compact.Solve the technical barrier that existing method inventory is large, production efficiency is low, cost is high.
Brief description of the drawings
Fig. 1 is the forming method first half pressed compact schematic diagram of hollow cylinder rare earth magnetic steel pressed compact of the present invention.
Fig. 2 is the forming method Lower Half pressed compact schematic diagram of hollow cylinder rare earth magnetic steel pressed compact of the present invention.
Fig. 3 is the forming method first half pressed compact axonometric drawing of hollow cylinder rare earth magnetic steel pressed compact of the present invention.
Fig. 4 is the forming method Lower Half pressed compact axonometric drawing of hollow cylinder rare earth magnetic steel pressed compact of the present invention.
Main description of reference numerals:
1-support, 2-core, 3-upper punch, 4-first half pressed compact, 5-clamping plate, 6-magnetic conductive board, 7-bottom punch, 8-Lower Half pressed compact.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of detailed description of the invention.
Unless separately there is other clearly to represent, otherwise in whole description and claims, term " comprises " or its conversion was stated being understood to include as " comprising " or " including " etc. element or part, and do not get rid of other element or other part.
As shown in Figures 1 to 4, according to the forming method of the hollow cylinder rare earth magnetic steel pressed compact of the specific embodiment of the invention, comprise the steps:
A., the mould being made up of magnetic conductive board 6, clamping plate 5, support 1, multiple core 2 is provided, and this mould has upper cavity.Both sides before and after two magnetic conductive boards 6 are arranged at respectively, the left and right sides of magnetic conductive board 6 has respectively protuberance.Two clamping plates 5 is arranged at respectively the left and right sides, is connected to the protuberance of magnetic conductive board 6 in the while.On support 1, offer the multiple semicircular openings corresponding with multiple cores 2, the radius of above-mentioned semicircular opening is identical with the radius of core 2, so that core 2 and support 1 can be combined closely.Support is put in to the bottom of the rectangular structure that magnetic conductive board 6 and clamping plate 5 surround, finally core 2 is put into the semicircular opening of support 1, the space on core 2 and support 1 top is upper cavity.The multiple cores 2 of above-mentioned once use have ensured once can the multiple hollow cylinder rare earth magnetic steel of moulding pressed compact, has improved production efficiency in actual production.
B. powder is packed in upper cavity.In practical operation, those skilled in the art can calculate according to the internal diameter of first half pressed compact 4, external diameter and length gauge the volume of each root hollow cylinder rare earth magnetic steel pressed compact, according to the density of powder, calculate the use amount of powder, thereby can save to the full extent the use amount of powder simultaneously.In production, overcome the large problem of inventory, also saved production cost simultaneously.Above-mentioned powder is preferably neodymium iron boron powder.
C. upper punch 3 is packed in upper cavity and suppressed, this is compressed to once compacting, once after compacting, forms first half pressed compact 4.On upper punch 3, offer the multiple semicircular openings corresponding with multiple cores 2, the radius of this semicircular opening is the external diameter of hollow cylinder rare earth magnetic steel pressed compact, and the radius of core 2 is the internal diameter of hollow cylinder rare earth magnetic steel pressed compact.
D. the overturn above-mentioned mould being formed by magnetic conductive board 6, clamping plate 5, support 1, multiple core 2 and upper punch 3, thus make upper punch 3 down, take out support 1, the position that support 1 is vacated is lower mode cavity.
E. powder is packed in lower mode cavity.Concrete grammar, with step b, therefore no longer describes in detail here.
F. bottom punch 7 is packed in lower mode cavity and suppressed, this is compressed to secondary compacting, after secondary compacting, forms Lower Half pressed compact 8.Bottom punch 7 is just the same with structure and the quality of upper punch 3, thereby ensures the uniformity consistency of pressure in the time of compacting, and then ensures the uniformity of the hollow cylinder rare earth magnetic steel green density after moulding.
G. dismantle magnetic conductive board 6, clamping plate 5, bottom punch 7 and upper punch 3, after above-mentioned several steps, although first half pressed compact 4 and Lower Half pressed compact 8 form the pressed compact of hollow cylinder rare earth magnetic steel, so its form and structure are not still very stable, need further to wait static pressure.
H. wait after static pressure, take out and be positioned at the core 2 that is clipped in first half pressed compact 4 and Lower Half pressed compact 8, so far form hollow cylinder rare earth magnetic steel pressed compact.
In sum, the forming method of hollow cylinder rare earth magnetic steel pressed compact of the present invention, it is easy to operation, and inventory is few, production efficiency is high, cost is low; Ensure straight forming hollow cylinder rare earth magnetic steel pressed compact.
The aforementioned description to concrete exemplary of the present invention is in order to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.Exemplary embodiment is selected and the object described is to explain certain principles of the present invention and practical application thereof, thereby made those skilled in the art can realize and utilize various exemplary of the present invention and various selection and change.Scope of the present invention is intended to be limited by claims and equivalents thereof.
Claims (3)
1. a forming method for hollow cylinder rare earth magnetic steel pressed compact, is characterized in that, described forming method comprises the steps:
A., mould is provided, and described mould comprises magnetic conductive board, clamping plate, support, multiple core, and described mould is formed with upper cavity;
B. powder is packed in described upper cavity;
C. upper punch is packed in described upper cavity and suppressed, thereby form first half pressed compact;
D. the described mould that overturns, makes described upper punch down, takes out described support, and then forms lower mode cavity;
E. described powder is packed in described lower mode cavity;
F. bottom punch is packed in described lower mode cavity and suppressed, thereby form Lower Half pressed compact;
G. dismantle described magnetic conductive board, described clamping plate, described upper punch and described bottom punch, wait static pressure;
H. after waiting static pressure, take out the described multiple cores between described first half pressed compact and described Lower Half pressed compact, thereby form multiple described hollow cylinder rare earth magnetic steel pressed compacts.
2. the forming method of hollow cylinder rare earth magnetic steel pressed compact as claimed in claim 1, it is characterized in that, on described support, offer the semicircular opening identical with the radius of described multiple cores, in the time carrying out above-mentioned steps a, described multiple cores are positioned in the described semicircular opening of described support.
3. the forming method of hollow cylinder rare earth magnetic steel pressed compact as claimed in claim 1, is characterized in that, described powder is neodymium iron boron powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410346968.XA CN104107909B (en) | 2014-07-21 | 2014-07-21 | The forming method of hollow cylinder rare earth magnetic steel pressed compact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410346968.XA CN104107909B (en) | 2014-07-21 | 2014-07-21 | The forming method of hollow cylinder rare earth magnetic steel pressed compact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104107909A true CN104107909A (en) | 2014-10-22 |
| CN104107909B CN104107909B (en) | 2016-05-25 |
Family
ID=51705005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410346968.XA Active CN104107909B (en) | 2014-07-21 | 2014-07-21 | The forming method of hollow cylinder rare earth magnetic steel pressed compact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104107909B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107309424A (en) * | 2017-07-03 | 2017-11-03 | 生伦磁业有限公司 | A kind of hollow magnet processing mold and hollow magnet processing technology |
| CN113241247A (en) * | 2021-05-10 | 2021-08-10 | 东莞市众旺永磁科技有限公司 | Manufacturing process of hollow magnetic product |
| CN114499080A (en) * | 2022-01-28 | 2022-05-13 | 中国科学院赣江创新研究院 | Composite permanent magnetic steel and manufacturing method thereof |
| CN116652183A (en) * | 2023-05-06 | 2023-08-29 | 华中科技大学 | Array arc-shaped hole structural member, forming system thereof and powder metallurgy preparation method |
| CN116890112A (en) * | 2023-09-08 | 2023-10-17 | 湖南三创切削工具有限公司 | Forming die and forming process for molding hard alloy bar by metal powder compression molding |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317384A (en) * | 2000-03-28 | 2001-10-17 | 住友特殊金属株式会社 | Powder pressing appts. and method for producing rere earch alloyed magnetic powder formed body |
| JP2007235017A (en) * | 2006-03-03 | 2007-09-13 | Matsushita Electric Ind Co Ltd | Sheet-shaped rare earth bond magnet, its manufacturing method, and motor using it |
| JP2007254813A (en) * | 2006-03-23 | 2007-10-04 | Tdk Corp | Method for producing rare earth sintered magnet and die for molding used therefor |
| CN201089013Y (en) * | 2007-09-28 | 2008-07-23 | 宁波市聚友磁业有限公司 | Special mould for implementing forming method of columniform permanent magnetic material having longitudinal through-hole |
| CN203356590U (en) * | 2013-06-26 | 2013-12-25 | 北京盛磁科技有限公司 | Pressing die for neodymium iron boron material |
-
2014
- 2014-07-21 CN CN201410346968.XA patent/CN104107909B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317384A (en) * | 2000-03-28 | 2001-10-17 | 住友特殊金属株式会社 | Powder pressing appts. and method for producing rere earch alloyed magnetic powder formed body |
| JP2007235017A (en) * | 2006-03-03 | 2007-09-13 | Matsushita Electric Ind Co Ltd | Sheet-shaped rare earth bond magnet, its manufacturing method, and motor using it |
| JP2007254813A (en) * | 2006-03-23 | 2007-10-04 | Tdk Corp | Method for producing rare earth sintered magnet and die for molding used therefor |
| CN201089013Y (en) * | 2007-09-28 | 2008-07-23 | 宁波市聚友磁业有限公司 | Special mould for implementing forming method of columniform permanent magnetic material having longitudinal through-hole |
| CN203356590U (en) * | 2013-06-26 | 2013-12-25 | 北京盛磁科技有限公司 | Pressing die for neodymium iron boron material |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107309424A (en) * | 2017-07-03 | 2017-11-03 | 生伦磁业有限公司 | A kind of hollow magnet processing mold and hollow magnet processing technology |
| CN113241247A (en) * | 2021-05-10 | 2021-08-10 | 东莞市众旺永磁科技有限公司 | Manufacturing process of hollow magnetic product |
| CN114499080A (en) * | 2022-01-28 | 2022-05-13 | 中国科学院赣江创新研究院 | Composite permanent magnetic steel and manufacturing method thereof |
| CN114499080B (en) * | 2022-01-28 | 2024-02-23 | 中国科学院赣江创新研究院 | Composite permanent magnet steel and manufacturing method thereof |
| CN116652183A (en) * | 2023-05-06 | 2023-08-29 | 华中科技大学 | Array arc-shaped hole structural member, forming system thereof and powder metallurgy preparation method |
| CN116652183B (en) * | 2023-05-06 | 2024-02-02 | 华中科技大学 | Array arc-shaped hole structural member, forming system thereof and powder metallurgy preparation method |
| CN116890112A (en) * | 2023-09-08 | 2023-10-17 | 湖南三创切削工具有限公司 | Forming die and forming process for molding hard alloy bar by metal powder compression molding |
| CN116890112B (en) * | 2023-09-08 | 2023-12-01 | 湖南三创切削工具有限公司 | Forming die and forming process for molding hard alloy bar by metal powder compression molding |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104107909B (en) | 2016-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104107909A (en) | Forming method for hollow cylindrical rare-earth magnetic steel compacts | |
| CN103878368A (en) | Technology and device for forming dry bag quick isostatic pressing in oriented magnetic fields | |
| CN203843166U (en) | Cold pressing die for manufacturing inductor | |
| CN105081317B (en) | A kind of mould of a multi-cavity mold | |
| CN104190925A (en) | Compression molding die | |
| CN205020805U (en) | Axial cylinder magnet forming die | |
| CN103128283B (en) | Forming die and method for preparing pressed billet of non-oriented neodymium iron boron cylindrical magnet | |
| CN104028754B (en) | The manufacture device of neodymium iron boron spheroid | |
| CN202473527U (en) | A magnetic component | |
| CN102847939B (en) | Magnetic material powder forming mold with non-magnetic isolating structure | |
| CN103934457B (en) | Abnormity rare earth magnetic steel forming method | |
| CN204392014U (en) | A kind of coil molding frock | |
| CN202845777U (en) | Permanent magnet sphere press-molding mold | |
| CN204934604U (en) | Neodymium iron boron magnetic body press-moulding die | |
| CN202317015U (en) | Molding compacting mould for sintering neodymium iron boron permanent magnet | |
| CN201845633U (en) | Sintered NdFeB multi-pole magnet ring | |
| CN203956080U (en) | The manufacturing installation of neodymium iron boron spheroid | |
| CN205240775U (en) | Powder feeder device | |
| CN202993820U (en) | Medium-frequency smelting furnace | |
| CN210910470U (en) | Rare earth ferrite permanent magnetic material forming device | |
| CN205521867U (en) | Embossing mold utensil with center post magnetic core | |
| CN209921692U (en) | Soft magnetic ferrite magnetic core neatly arranges device | |
| CN207971421U (en) | A kind of magnetic material special molding hydraulic press | |
| CN213410314U (en) | Magnetic steel forming die | |
| CN211990924U (en) | Pressing die for neodymium iron boron permanent magnet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |