CN101850421A - Molding device for NdFeB materials - Google Patents

Molding device for NdFeB materials Download PDF

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Publication number
CN101850421A
CN101850421A CN 201010207390 CN201010207390A CN101850421A CN 101850421 A CN101850421 A CN 101850421A CN 201010207390 CN201010207390 CN 201010207390 CN 201010207390 A CN201010207390 A CN 201010207390A CN 101850421 A CN101850421 A CN 101850421A
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China
Prior art keywords
press
magnetic
molding
ndfeb
hydraulic
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CN 201010207390
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Chinese (zh)
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CN101850421B (en
Inventor
宋小明
张英海
周鸿波
任春德
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Ningbo Permanent Magnetics Co Ltd
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Ningbo Permanent Magnetics Co Ltd
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Priority to CN201010207390A priority Critical patent/CN101850421B/en
Publication of CN101850421A publication Critical patent/CN101850421A/en
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Publication of CN101850421B publication Critical patent/CN101850421B/en
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Abstract

The invention provides a molding device for NdFeB materials, which comprises a press body, an electromagnet, a hydraulic device, a metal mold and an elastomer mold, wherein the press body comprises a frame, an upper pressure head and a lower pressure head which are fixed on the frame and are made from magnetic non-conductive materials; the upper and lower surfaces of the metal mold consist of magnetic non-conductive materials; the left and right surfaces of the metal mold consist of magnetic conductive materials; the elastomer mold is arranged in the metal mold; and a cavity between the metal mold and the elastomer mold is communicated with the hydraulic device. The molding device has the advantages that: 1, a press to which the invention relates can accomplish function that needs to be realized by an oriented molding press and an isostatic press in a conventional NdFeB sintering molding process on one device; and 2, the molding device raises the volume recovery of materials, reduces production cost, and has strong competitive advantage.

Description

A kind of shaped device of NdFeB material
Technical field
The present invention relates to a kind of shaped device of neodymium-iron-boron magnetic material.
Background technology
At present, in the production industry of neodymium-iron-boron magnetic material, generally realize the orientation compression moulding of neodymium-iron-boron magnetic material, improve the density of NdFeB blank again by isostatic pressing process by automatic Magnetic field press.The oriented moulding press mainly contains two classes: vertical magnetic field press and parallel Magnetic field press.What generally adopt is the vertical magnetic field press, be that electromagnet is fixed on the press operation platform, two groups of coil left-right symmetry distribute, pressure head is in upper-lower position, because NdFeB material pressure of living in is perpendicular to magnetic field line, shortcoming is to exist frictional force to cause the crystal grain direction of magnetization of finished product fringe region to deflect owing to magnetic and mould in NdFeB material compression moulding process, has influenced magnet magnetic property uniformity; Another kind is the parallel magnetic field press, and promptly electromagnet is fixed on the pressure head, and the magnetic line of force of generation is consistent with the press power direction.Shortcoming is that the frictional force that acts in the forming process of pressure causes many little crystal grain direction of magnetizations that deflection has taken place, and the magnetic property that the method causes descends more remarkable, and practical application is less.Because the deficiency that above-mentioned two kinds of methods exist causes that deviation appears in finished product magnetic property uniformity in following process, causes the material volume recovery to reduce, production cost improves.
Summary of the invention
Technical problem to be solved by this invention is to overcome the above-mentioned deficiency of prior art and shaped device that a kind of NdFeB material is provided, can reduce effectively because frictional force acts on the magnetic powder particle that causes a part to be orientated in the forming process deflects by this device, improve the uniformity of magnetic property, reduced production cost of products.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
A kind of shaped device of NdFeB material, comprise press body, electromagnet, hydraulic means, metal die and elastomer moulds, described press body comprises seaming chuck, the push-down head made by non-magnet material on frame, the fixed frame, the metal die top and bottom by non-magnet material form, about face form by permeability magnetic material, the built-in elastomer moulds of metal die, metal die communicates with hydraulic means with cavity between the elastomer moulds.
When above-mentioned moulding press uses, NdFeB magnetic powder is placed rubber mold, rubber mold places metal die again, installs metal die, uses push-down head and fixes metal die.Again electromagnet energising back is formed magnetic field center at the magnet forming area, in waiting static pressure magnetic field, by hydraulic means hydraulic oil is injected cavity between metal die and the rubber mold, the comprehensive even stressed compression moulding of the NdFeB magnetic powder under high oil pressure in the rubber mold.
Owing to adopt not magnetic conduction pressure head, last push-down head only plays the effect of lower baffle plate on the fixed mould, again owing to adopt flexible rubber, magnet comprehensive stressed evenly, so the magnetic powder particle that has been orientated of magnet fringe region ratio minimizing that deflects.
Compared with prior art, the invention has the advantages that:
1, utilization rubber pattern, hydraulic means carries out moulding, reduced significantly Nd-Fe-Bo permanent magnet material in the existing moulding process because the magnetic powder particle that magnetic and mould contact friction force cause fringe region to be orientated deflects and then the magnetic property uniformity that causes is bad.
2, on 1 equipment, finish the function that realizes by oriented moulding press and 2 ability of isostatic pressing machine in original Sintered NdFeB moulding process.
3,, reduced because of frictional force causes blank heating, oxidation, shortcoming such as catch fire owing to reduced the stroke of magnetic in mould in the pressing process.
4, improve the material volume recovery, reduced production cost, had stronger competitive advantage.
Description of drawings
Fig. 1 is the front section view of the embodiment of the invention.
Fig. 2 bows to cutaway view for the embodiment of the invention.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1 and Figure 2, a kind of shaped device of NdFeB material comprises press body, electromagnet 3, hydraulic means 9, electric control gear, metal die 6 and rubber mold 5.
The press body comprises seaming chuck 1, the push-down head 7 made by non-magnet material on frame (not drawing among the figure), the fixed frame.
Seaming chuck 1, push-down head 7 are by electric control gear control knee-action, and electromagnet 3 is also controlled by electric control gear.
Hydraulic means 9 is fixed on the frame.
Metal die 6 top and bottom by non-magnet material form, about face form by permeability magnetic material, link to each other with hydraulic test 9 by importing and exporting pipeline 8 in the cavity 2 between the built-in rubber mold 5 of metal die, metal die 6 and rubber mold 5.
Adopt above-mentioned moulding press, the magnet forming process of NdFeB material is as follows:
1, installation mold: install according to the mould that designs, install hydraulic means.
2, charging: with the elastic mould magnetic material 4 of packing into, the good seal elastic mould is put into metal die again in guard box, the good seal metal die, and last push-down head is fixed mould.
3, pre-magnetizing: electromagnet coil power forms the highfield, the stabilizing magnetic field certain hour.
4, logical oil, add oil pressure: begin logical oil behind the mould good seal, begin slow pressurization after magnetic field is stable, pressure reaches setting value back pressurize certain hour, finishes moulding.
5, demagnetization: electromagnet coil outage, demagnetization.
6, subtract oil pressure, drain the oil: subtract oil pressure after moulding is finished, drain the oil.
7, discharging: seaming chuck rises, and takes out rubber mold, takes out magnet again and is for further processing.

Claims (2)

1. the shaped device of a NdFeB material, it is characterized in that: comprise press body, electromagnet, hydraulic means, metal die and elastomer moulds, described press body comprises seaming chuck, the push-down head made by non-magnet material on frame, the fixed frame, the metal die top and bottom by non-magnet material form, about face form by permeability magnetic material, the built-in elastomer moulds of metal die, metal die communicates with hydraulic means with cavity between the elastomer moulds.
2. the shaped device of NdFeB material as claimed in claim 1, it is characterized in that: described elastomer moulds is a rubber mold.
CN201010207390A 2010-06-23 2010-06-23 Molding device for NdFeB materials Active CN101850421B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201010207390A CN101850421B (en) 2010-06-23 2010-06-23 Molding device for NdFeB materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201010207390A CN101850421B (en) 2010-06-23 2010-06-23 Molding device for NdFeB materials

Publications (2)

Publication Number Publication Date
CN101850421A true CN101850421A (en) 2010-10-06
CN101850421B CN101850421B (en) 2012-10-17

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102294479A (en) * 2011-08-30 2011-12-28 宁波韵升股份有限公司 Method for preparing sintered neodymium iron boron device
CN102554227A (en) * 2012-02-07 2012-07-11 宁波宁港永磁材料有限公司 Method for forming samarium cobalt blank
CN103111618A (en) * 2012-10-31 2013-05-22 宁波永久磁业有限公司 Device of neodymium iron boron automatic suppressing orientation forming and method
CN103846435A (en) * 2012-12-07 2014-06-11 三环瓦克华(北京)磁性器件有限公司 Combined mold
CN105346129A (en) * 2015-12-14 2016-02-24 董中天 Magnetic field isostatic pressing machine
CN106409456A (en) * 2016-08-26 2017-02-15 宁波同创强磁材料有限公司 Rare earth permanent magnet preparation process for improving magnetic property
CN110919822A (en) * 2019-12-12 2020-03-27 湖南航天磁电有限责任公司 Permanent magnetic ferrite wet process shaping's lower punching die

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU554078A1 (en) * 1974-05-17 1977-04-15 Предприятие П/Я М-5225 Powder compactor
JPH08258018A (en) * 1995-03-23 1996-10-08 Nippon Steel Corp Mold for forming powder
CN2527379Y (en) * 2002-01-21 2002-12-25 王先良 Ring type and parallel radiation magnetic field press machine
CN201077162Y (en) * 2007-08-13 2008-06-25 南通国谊锻压机床厂 Die pressing device of radiation oriented moulding hydraulic press
CN201720426U (en) * 2010-06-23 2011-01-26 宁波永久磁业有限公司 Molding device of neodymium iron boron material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU554078A1 (en) * 1974-05-17 1977-04-15 Предприятие П/Я М-5225 Powder compactor
JPH08258018A (en) * 1995-03-23 1996-10-08 Nippon Steel Corp Mold for forming powder
CN2527379Y (en) * 2002-01-21 2002-12-25 王先良 Ring type and parallel radiation magnetic field press machine
CN201077162Y (en) * 2007-08-13 2008-06-25 南通国谊锻压机床厂 Die pressing device of radiation oriented moulding hydraulic press
CN201720426U (en) * 2010-06-23 2011-01-26 宁波永久磁业有限公司 Molding device of neodymium iron boron material

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102294479A (en) * 2011-08-30 2011-12-28 宁波韵升股份有限公司 Method for preparing sintered neodymium iron boron device
CN102294479B (en) * 2011-08-30 2013-11-13 宁波韵升股份有限公司 Method for preparing sintered neodymium iron boron device
CN102554227A (en) * 2012-02-07 2012-07-11 宁波宁港永磁材料有限公司 Method for forming samarium cobalt blank
CN103111618A (en) * 2012-10-31 2013-05-22 宁波永久磁业有限公司 Device of neodymium iron boron automatic suppressing orientation forming and method
CN103111618B (en) * 2012-10-31 2015-06-10 宁波永久磁业有限公司 Device of neodymium iron boron automatic suppressing orientation forming and method
CN103846435A (en) * 2012-12-07 2014-06-11 三环瓦克华(北京)磁性器件有限公司 Combined mold
CN105346129A (en) * 2015-12-14 2016-02-24 董中天 Magnetic field isostatic pressing machine
CN106409456A (en) * 2016-08-26 2017-02-15 宁波同创强磁材料有限公司 Rare earth permanent magnet preparation process for improving magnetic property
CN106409456B (en) * 2016-08-26 2018-09-07 宁波同创强磁材料有限公司 A kind of rare earth permanent magnet preparation process improving magnetic property
CN110919822A (en) * 2019-12-12 2020-03-27 湖南航天磁电有限责任公司 Permanent magnetic ferrite wet process shaping's lower punching die

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Publication number Publication date
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