CN110491615A - A kind of neodymium-iron-boron preparation for DC micro-motor - Google Patents
A kind of neodymium-iron-boron preparation for DC micro-motor Download PDFInfo
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- CN110491615A CN110491615A CN201910647734.1A CN201910647734A CN110491615A CN 110491615 A CN110491615 A CN 110491615A CN 201910647734 A CN201910647734 A CN 201910647734A CN 110491615 A CN110491615 A CN 110491615A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0578—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together bonded together
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- 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
- H01F41/0253—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 for manufacturing permanent magnets
- H01F41/0266—Moulding; Pressing
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- 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
- H01F41/0253—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 for manufacturing permanent magnets
- H01F41/0273—Imparting anisotropy
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Abstract
The present invention relates to neodymium iron boron magnetic body technical fields, provide a kind of neodymium-iron-boron preparation for DC micro-motor, comprising the following steps: 1) prepared by cladding powder；2) magnetic powder is compound；3) it suppresses；4) solidify；5) hot rolling or drop stamping finally obtain the isotropism neodymium iron boron magnetic body of anisotropic neodymium iron boron magnetic body or arc.The present invention uses Novel magnetic powder material, there is excellent magnetism by the Nd-Fe-B magnet that new magnet preparation step is prepared, good winding capacity, lesser size, Novel magnetic body can be further decreased to the size of direct current generator applied to DC micro-motor, the current drain for reducing direct current generator increases the mechanical output of direct current generator.Compared to conventional magnet, anisotropic neodymium iron boron magnetic body, which is applied to DC micro-motor, can be reduced current drain to 2/3rds；The isotropism neodymium iron boron magnetic body of arc, which is applied to DC micro-motor, can increase about 0.6 times for the mechanical output of direct current generator.
Description
Technical field
The present invention relates to neodymium iron boron magnetic body technical fields, and in particular to a kind of neodymium iron boron magnetic body for DC micro-motor
Preparation method.
Background technique
Neodymium iron boron (Nd-Fe-B) magnet is most common rare-earth permanent magnet, is widely used in electronic product.Neodymium iron
Boron (Nd-Fe-B) rare-earth permanent magnet can be divided into two class of bonded permanent magnet and sintered magnet, and wherein bonded permanent magnet is by NdFeB magnetic powder
It is prepared with binder by the methods of injection moulding, compression moulding or calendering formation.Bonded permanent magnet have freedom shape it is good,
Cost performance is high, small in size, the advantages that haveing excellent performance, therefore is widely used in computer peripheral equipment, office automation, direct current
In machine.For bonded permanent magnet compared with being sintered magnetic, bonded permanent magnet can be once-forming, can be made the magnet of various shape complexity, will
It applies the weight and volume that motor can be greatly reduced in motor.
In order to further decrease the size of DC micro-motor, need to develop a kind of new prepare with excellent magnetic
The technology of Novel magnetic body.Such as attached drawing 1 of the relationship between relevant technological maheup is prepared to bonded permanent magnet including new technology
It is shown, it is necessary to change the preparation method of magnet, to improve the overall performance of bonded permanent magnet.Anisotropy HDDR magnetic powder and each to same
Property spherical magnetic powder be not mainly used in the annular and the preparation of arc magnet of small dc motor.It is small-sized in order to be applied to them
Direct current generator needs to develop a kind of new method that can prepare high density bonded magnet.
Summary of the invention
In view of the above-mentioned problems in the prior art, the present invention provides a kind of neodymium iron boron magnetic body preparations for DC micro-motor
Method is prepared for a kind of bonding that can be applied to DC micro-motor by new magnet preparation method using Novel magnetic powder material
Neodymium iron boron magnetic body.Prepared Nd-Fe-B magnet has excellent magnetism, and Novel magnetic body is applied to small by lesser size
Type direct current generator can further decrease the size of direct current generator.
The following technical solution is employed by the present invention:
A kind of neodymium-iron-boron preparation for DC micro-motor, comprising the following steps:
(1) prepared by cladding powder: taking solids epoxy oligomer and magnetic powder, it is low to prepare solids epoxy using fluidized-bed reactor
The magnetic powder of polymers cladding, the magnetic powder are anisotropy HDDR magnetic powder or the spherical magnetic powder of isotropism；
(2) magnetic powder is compound: the magnetic powder and powder curing agent and lubricant that solids epoxy oligomer is coated use cold mixer
It carries out dry-mixed, obtains composite magnetic powder；
(3) it suppresses: composite magnetic powder is poured into the cavity of powder compaction press, under the pressure of 0.4~0.6GPa, 1.5~
In the axial magnetic field of 1.6MA/m, the highdensity green compact of approximate mesh sheet shape are made in 80 DEG C of temperatures；
(4) solidify: by high density green compact 160 DEG C~200 DEG C at a temperature of solidify 20 minutes, the rigidity for obtaining sheet is viscous
Tie magnet；
(5) when the magnetic powder in step (1) is anisotropy HDDR magnetic powder, hot rolling is carried out:
By the rigid bond magnet of sheet by hot-rolling mill 60 DEG C -80 DEG C at a temperature of with the rolling rate of 20%-80%
Slabbing magnet is rolled, anisotropic neodymium iron boron magnetic body is obtained；
When the magnetic powder spherical for isotropism of the magnetic powder in step (1), drop stamping is carried out:
Drop stamping processing is carried out to the rigid bond magnet of sheet, under conditions of the pressure of 1GPa, 110 DEG C~130 DEG C
Stamped sheet rigid bond magnet obtains the isotropism neodymium iron boron magnetic body of arc.
Further, the anisotropic neodymium iron boron magnetic body with a thickness of 2.0-2.5mm；The isotropism neodymium of the arc
Inside radius, outer radius, maximum gauge and the maximum length of iron boron magnet are respectively 3.55mm, 3.65mm, 1.9mm and 5mm.
Further, neodymium iron boron magnetic body is put into milling train, is rolled under 70 DEG C of rolling temperature.
In above-mentioned technical proposal, prepared magnet to be crimped and be circlewise mounted on DC micro-motor, this is just needed
Novel neodymium iron boron magnetic body is wanted to have certain flexibility, by rolling so that the magnet of preparation has certain winding capacity.
In order to make the magnet of preparation that there is certain flexibility, the neodymium iron boron magnetic body prepared through the above steps is put into
It in milling train, is rolled under 70 DEG C of rolling temperature, makes it have preferable flexibility, good winding capacity.
Further, neodymium iron boron magnetic body rolling after with a thickness of 1.15mm or so.
Further, the milling train is two roller sheet mills, and the diameter of the roll upper roller and lower roll is 90mm.
Further, the solids epoxy oligomer is selected from brominated bisphenol a type epoxy resin, phenol aldehyde type epoxy resin, double
One of phenol A type epoxy resin, phenol formaldehyde type asphalt mixtures modified by epoxy resin.
Further, the powder curing agent is selected from amino resins, aromatic polyamine, hydrazides, resol, double cyanogen
One of amine, acid anhydrides.
Further, the lubricant is stearic acid zinc salt.
Further, when magnetic powder described in step (1) is anisotropy HDDR magnetic powder, anisotropy HDDR magnetic powder, solid
The mass percent of epoxy oligomer, curing agent and lubricant be respectively 96.2~98.1wt%, 1.5~3.0wt%, 0.1~
0.3wt%, 0.3~0.5wt%.
Preferably, the anisotropy HDDR magnetic powder forms by mass percentage are as follows: Nd:10%~15%, Dy:0.1%
~0.5%, Co:5%~20%, Zr:0.05%~0.2%, Ga:0.2%~0.9%, B:5%~10%, surplus Fe.
Preferably, the anisotropy HDDR magnetic powder is to be prepared by HDDR (i.e. hydrogenation-disproportionation-desorption-recrystallization) method
Obtained anisotropic bonded magnet magnetic powder.
Further, when magnetic powder described in step (1) is isotropism spherical magnetic powder, the spherical magnetic powder of isotropism, solid
The mass percent of epoxy oligomer, curing agent and lubricant be respectively 96.1~98.1wt%, 1.5~3.0wt%, 0.1~
0.2wt%, 0.3~0.7wt%.
Preferably, the spherical magnetic powder of the isotropism forms by mass percentage are as follows: and Nd:7.0%~9.5%, B:5%~
6%, Ti:0.2%~0.4%, Zr:0.1%~0.25%, surplus Fe.
The invention has the advantages that:
The present invention by Nd-Fe-B magnet prepare material powder carry out it is compound, by compacting prepare high density green compact, so
Sheet green compact are solidified afterwards, anisotropy and isotropic New Magnetic Field Controlled are respectively obtained by the method for hot rolling and drop stamping
Body makes magnet have certain winding capacity, can wind and circlewise be applied to DC micro-motor finally by rolling.
The present invention uses Novel magnetic powder material, the Nd-Fe-B magnet and biography being prepared by new magnet preparation step
System magnet is compared, and is had excellent magnetism, good winding capacity, therefore can wind annularly by the magnet of rolling, is answered
For DC micro-motor.
The size that Novel magnetic body can be further decreased to direct current generator applied to DC micro-motor, reduces direct current generator
Current drain, increase the mechanical output of direct current generator.
The present invention uses a kind of Agglutinate neodymium-iron-boron applied to DC micro-motor prepared by the spherical magnetic powder of isotropism
Magnet can reduce the current drain of direct current generator compared with conventional magnet, by magnet applications prepared by the present invention in small-sized straight
Galvanic electricity machine can be reduced current drain to 2/3rds.
The present invention uses a kind of Agglutinate neodymium-iron-boron applied to DC micro-motor prepared by anisotropy HDDR magnetic powder
Magnet can increase the mechanical output of direct current generator compared with conventional magnet, by magnet applications prepared by the present invention in small-sized straight
The mechanical output of direct current generator can be increased about 0.6 times by galvanic electricity machine.
Detailed description of the invention
Fig. 1 is that bonded permanent magnet prepares the relational graph between relevant technological maheup；
Fig. 2 is Technology Roadmap of the invention.
Specific embodiment
In order to make those skilled in the art further understand the present invention, combined with specific embodiments below to the present invention into
Row explains in detail.
Referring to Fig.2, a kind of neodymium-iron-boron preparation for DC micro-motor, comprising the following steps:
(1) prepared by cladding powder: taking solids epoxy oligomer and magnetic powder, it is low to prepare solids epoxy using fluidized-bed reactor
The magnetic powder of polymers cladding, the magnetic powder are anisotropy HDDR magnetic powder or the spherical magnetic powder of isotropism；
(2) magnetic powder is compound: the magnetic powder and powder curing agent and lubricant that solids epoxy oligomer is coated use cold mixer
It carries out dry-mixed, obtains composite magnetic powder；
(3) it suppresses: composite magnetic powder is poured into the cavity of powder compaction press, under the pressure of 0.4~0.6GPa, 1.5~
In the axial magnetic field of 1.6MA/m, the highdensity green compact of approximate mesh sheet shape are made in 80 DEG C of temperatures；
(4) solidify: by high density green compact 160 DEG C~200 DEG C at a temperature of solidify 20 minutes, the rigidity for obtaining sheet is viscous
Tie magnet；
(5) when the magnetic powder in step (1) is anisotropy HDDR magnetic powder, hot rolling is carried out:
By the rigid bond magnet of sheet by hot-rolling mill 60 DEG C -80 DEG C at a temperature of with the rolling rate of 20%-80%
Slabbing magnet is rolled, anisotropic neodymium iron boron magnetic body is obtained；
When the magnetic powder spherical for isotropism of the magnetic powder in step (1), drop stamping is carried out:
Drop stamping processing is carried out to the rigid bond magnet of sheet, under conditions of the pressure of 1GPa, 110 DEG C~130 DEG C
Stamped sheet rigid bond magnet obtains the isotropism neodymium iron boron magnetic body of arc.
Embodiment 1
The following steps are included:
(1) anisotropy HDDR magnetic powder 2915g, bisphenol A type epoxy resin 67g, dicyandiamide 6g, zinc octadecanate ingredient: are taken
Salt 12g.
(2) magnetic powder is compound: being pre-mixed first, prepares cladding powder by fluidized-bed reactor, uses bisphenol-A type ring
Oxygen resin coats anisotropy HDDR magnetic powder.Then anisotropy HDDR magnetic powder bisphenol A type epoxy resin coated
It is dry-mixed by the progress of cold mixing device with dicyandiamide, stearic acid zinc salt.
(3) it suppresses: the composite magnetic powder that step (2) obtains being poured into the cavity of powder compaction press, and in the pressure of 0.55GPa
Under power, in the axial magnetic field of 1.5MA/m, the highdensity green compact of approximate mesh sheet shape are made in 80 DEG C of temperatures.
(4) solidify: the high density green compact that step (3) is obtained at 180 DEG C at a temperature of solidify 20 minutes, obtain sheet
Rigid bond magnet.
(5) hot rolling: by the obtained sheet rigid bond magnet of step (4) by hot-rolling mill 70 DEG C at a temperature of with about
50% rolling rate rolls slabbing magnet.
(6) it rolls: being 90mm by the diameter that the neodymium iron boron magnetic body prepared through the above steps is put into upper roller and lower roll
Two roller sheet mills in, rolled under 70 DEG C of rolling temperature, make it have preferable flexibility, good winding energy
Power.
Embodiment 2
(1) ingredient: the spherical magnetic powder 2900g of isotropism, bisphenol A type epoxy resin 75g, dicyandiamide 10g, stearic acid zinc salt
15g。
(2) magnetic powder is compound: being pre-mixed first, prepares cladding powder by fluidized-bed reactor, uses bisphenol-A type ring
Oxygen resin coats the spherical magnetic powder of isotropism.Then the spherical magnetic powder of isotropism bisphenol A type epoxy resin coated
It is dry-mixed by the progress of cold mixing device with dicyandiamide, stearic acid zinc salt.
(3) it suppresses: the composite magnetic powder that step (2) obtains being poured into the cavity of powder compaction press, and in the pressure of 0.5GPa
Under power, in the axial magnetic field of 1.5MA/m, the highdensity green compact of approximate mesh sheet shape are made in 80 DEG C of temperatures.
(4) solidify: the high density green compact that step (3) is obtained at 180 DEG C at a temperature of solidify 20 minutes, obtain sheet
Rigid bond magnet.
(5) drop stamping: the sheet rigid bond magnet obtained to step (4) carries out drop stamping processing, 1GPa pressure,
Sheet rigid bond magnet is stamped out under conditions of 120 DEG C, obtains the isotropism ndfeb magnet of arc.
(6) it rolls: being 90mm by the diameter that the neodymium iron boron magnetic body prepared through the above steps is put into upper roller and lower roll
Two roller sheet mills in, rolled under 70 DEG C of rolling temperature, make it have preferable flexibility, good winding energy
Power.
Embodiment 3
(1) anisotropy HDDR magnetic powder 962g, brominated bisphenol a type epoxy resin 15g, amino resins 1g, 18 ingredient: are taken
Sour zinc salt 3g.
(2) magnetic powder is compound: being pre-mixed first, prepares cladding powder by fluidized-bed reactor, uses brominated bisphenol A
Type epoxy resin coats anisotropy HDDR magnetic powder；Then HDDR magnetic powder brominated bisphenol a type epoxy resin coated
It is carried out with amino resins, stearic acid zinc salt using cold mixer dry-mixed, obtains composite magnetic powder.
(3) it suppresses: composite magnetic powder is poured into the cavity of powder compaction press, under the pressure of 0.4GPa, the axis of 1.6MA/m
Into magnetic field, the highdensity green compact of approximate mesh sheet shape are made in 80 DEG C of temperatures.
(4) solidify: by high density green compact 160 DEG C at a temperature of solidify 20 minutes, obtain the rigid bond magnet of sheet.
(5) hot rolling: by sheet rigid bond magnet by hot-rolling mill 60 DEG C at a temperature of rolled with about 20% rolling rate
Sheet magnet is made.Final prepared anisotropic neodymium iron boron magnetic body thickness is about 2.5mm.
(6) it rolls: being 90mm by the diameter that the neodymium iron boron magnetic body prepared through the above steps is put into upper roller and lower roll
Two roller sheet mills in, rolled under 70 DEG C of rolling temperature, make it have preferable flexibility, good winding energy
Power.
Embodiment 4
(1) anisotropy HDDR magnetic powder 981g, phenol aldehyde type epoxy resin 30g, aromatic polyamine 3g, stearic acid ingredient: are taken
Zinc salt 5g.
The anisotropy HDDR magnetic powder forms by mass percentage are as follows: Nd:10%, Dy:0.1%, Co:5%, Zr:
0.05%, Ga:0.2%, B:5%, surplus Fe.
(2) magnetic powder is compound: being pre-mixed first, prepares cladding powder by fluidized-bed reactor, uses phenolic aldehyde type ring
Oxygen resin coats anisotropy HDDR magnetic powder；Then the HDDR magnetic powder of phenol aldehyde type epoxy resin cladding and aromatic series is more
Amine, stearic acid zinc salt are carried out dry-mixed using cold mixer, obtain composite magnetic powder.
(3) it suppresses: composite magnetic powder is poured into the cavity of powder compaction press, under the pressure of 0.6GPa, the axis of 1.6MA/m
Into magnetic field, the highdensity green compact of approximate mesh sheet shape are made in 80 DEG C of temperatures.
(4) solidify: by high density green compact 200 DEG C at a temperature of solidify 20 minutes, obtain the rigid bond magnet of sheet.
(5) hot rolling: by sheet rigid bond magnet by hot-rolling mill 80 DEG C at a temperature of rolled with about 80% rolling rate
Sheet magnet is made.Final prepared anisotropic neodymium iron boron magnetic body thickness is about 2.0mm.
(6) it rolls: being 90mm by the diameter that the neodymium iron boron magnetic body prepared through the above steps is put into upper roller and lower roll
Two roller sheet mills in, rolled under 70 DEG C of rolling temperature, make it have preferable flexibility, good winding energy
Power.
Embodiment 5
(1) anisotropy HDDR magnetic powder 970, phenol formaldehyde type asphalt mixtures modified by epoxy resin 20g, resol 2g, 18 ingredient: are taken
Sour zinc salt 4g.
The anisotropy HDDR magnetic powder forms by mass percentage are as follows: Nd:15%, Dy:0.5%, Co:20%, Zr:
0.2%, Ga:0.9%, B:10%, surplus Fe.
Anisotropy HDDR magnetic powder is each to different to be prepared by HDDR (i.e. hydrogenation-disproportionation-desorption-recrystallization) method
Property bonded permanent magnet magnetic powder.
(2) magnetic powder is compound: being pre-mixed first, prepares cladding powder by fluidized-bed reactor, use phenol formaldehyde (PF)
Type asphalt mixtures modified by epoxy resin coats anisotropy HDDR magnetic powder；Then HDDR magnetic powder phenol formaldehyde type asphalt mixtures modified by epoxy resin coated and first rank
Phenolic resin, stearic acid zinc salt are carried out dry-mixed using cold mixer, obtain composite magnetic powder.
(3) it suppresses: composite magnetic powder is poured into the cavity of powder compaction press, under the pressure of 0.45GPa, 1.6MA/m's
In axial magnetic field, the highdensity green compact of approximate mesh sheet shape are made in 80 DEG C of temperatures.
(4) solidify: by high density green compact 180 DEG C at a temperature of solidify 20 minutes, obtain the rigid bond magnet of sheet.
(5) hot rolling: by sheet rigid bond magnet by hot-rolling mill 65 DEG C at a temperature of rolled with about 60% rolling rate
Sheet magnet is made.
(6) it rolls: being 90mm by the diameter that the neodymium iron boron magnetic body prepared through the above steps is put into upper roller and lower roll
Two roller sheet mills in, rolled under 70 DEG C of rolling temperature, make it have preferable flexibility, good winding energy
Power.
Embodiment 6
(1) ingredient: the spherical magnetic powder 961g of isotropism, phenol aldehyde type epoxy resin 15g, hydrazides 1g, stearic acid zinc salt 3g.,
(2) magnetic powder is compound: being pre-mixed first, prepares cladding powder by fluidized-bed reactor, uses phenolic aldehyde type ring
Oxygen resin coats the spherical magnetic powder of isotropism；Then by phenol aldehyde type epoxy resin cladding the spherical magnetic powder of isotropism with
Hydrazides, stearic acid zinc salt are carried out dry-mixed using cold mixer, obtain composite magnetic powder.
(3) it suppresses: composite magnetic powder is poured into the cavity of powder compaction press, under the pressure of 0.4GPa, the axis of 1.6MA/m
Into magnetic field, the highdensity green compact of approximate mesh sheet shape are made in 80 DEG C of temperatures.
(4) solidify: by high density green compact 160 DEG C at a temperature of solidify 20 minutes, obtain the rigid bond magnet of sheet.
(5) drop stamping: drop stamping processing is carried out to sheet rigid bond magnet, under conditions of the pressure of 1GPa, 110 DEG C
Stamp out sheet rigid bond magnet, obtains the isotropism ndfeb magnet of arc.
(6) it rolls: being 90mm by the diameter that the neodymium iron boron magnetic body prepared through the above steps is put into upper roller and lower roll
Two roller sheet mills in, rolled under 70 DEG C of rolling temperature, make it have preferable flexibility, good winding energy
Power.
Embodiment 7
(1) ingredient: the spherical magnetic powder 981g of isotropism, phenol formaldehyde type asphalt mixtures modified by epoxy resin 30g, acid anhydrides 2g, stearic acid zinc salt 7g.
The spherical magnetic powder of isotropism forms by mass percentage are as follows: Nd:7.0%~9.5%, B:5%~6%, Ti:
0.2%~0.4%, Zr:0.1%~0.25%, surplus Fe.
(2) magnetic powder is compound: being pre-mixed first, prepares cladding powder by fluidized-bed reactor, use phenol formaldehyde (PF)
Type asphalt mixtures modified by epoxy resin coats the spherical magnetic powder of isotropism；Then the spherical magnetic of isotropism phenol formaldehyde type asphalt mixtures modified by epoxy resin coated
Powder is carried out with acid anhydrides, stearic acid zinc salt using cold mixer dry-mixed, obtains composite magnetic powder.
(3) it suppresses: composite magnetic powder is poured into the cavity of powder compaction press, under the pressure of 0.6GPa, the axis of 1.6MA/m
Into magnetic field, the highdensity green compact of approximate mesh sheet shape are made in 80 DEG C of temperatures.
(4) solidify: by high density green compact 200 DEG C at a temperature of solidify 20 minutes, obtain the rigid bond magnet of sheet.
(5) drop stamping: drop stamping processing is carried out to sheet rigid bond magnet, under conditions of the pressure of 1GPa, 130 DEG C
Stamp out sheet rigid bond magnet, obtains the isotropism ndfeb magnet of arc.
(6) it rolls: being 90mm by the diameter that the neodymium iron boron magnetic body prepared through the above steps is put into upper roller and lower roll
Two roller sheet mills in, rolled under 70 DEG C of rolling temperature, make it have preferable flexibility, good winding energy
Power.
Embodiment 8
(1) ingredient: the spherical magnetic powder 970g of isotropism, brominated bisphenol a type epoxy resin 20g, resol 1.5g,
Stearic acid zinc salt 5g.
The spherical magnetic powder of isotropism forms by mass percentage are as follows: Nd:7.0%~9.5%, B:5%~6%, Ti:
0.2%~0.4%, Zr:0.1%~0.25%, surplus Fe.
(2) magnetic powder is compound: being pre-mixed first, prepares cladding powder by fluidized-bed reactor, uses brominated bisphenol A
Type epoxy resin coats the spherical magnetic powder of isotropism；Then isotropism brominated bisphenol a type epoxy resin coated
Spherical magnetic powder is carried out with resol, stearic acid zinc salt using cold mixer dry-mixed, obtains composite magnetic powder.
(3) it suppresses: composite magnetic powder is poured into the cavity of powder compaction press, under the pressure of 0.5GPa, the axis of 1.6MA/m
Into magnetic field, the highdensity green compact of approximate mesh sheet shape are made in 80 DEG C of temperatures.
(4) solidify: by high density green compact 190 DEG C at a temperature of solidify 20 minutes, obtain the rigid bond magnet of sheet.
(5) drop stamping: drop stamping processing is carried out to sheet rigid bond magnet, under conditions of the pressure of 1GPa, 120 DEG C
Stamp out sheet rigid bond magnet, obtains the isotropism ndfeb magnet of arc.
(6) it rolls: being 90mm by the diameter that the neodymium iron boron magnetic body prepared through the above steps is put into upper roller and lower roll
Two roller sheet mills in, rolled under 70 DEG C of rolling temperature, make it have preferable flexibility, good winding energy
Power.
Embodiment 9
(1) ingredient: the spherical magnetic powder 975g of isotropism, bisphenol A type epoxy resin 25g, aromatic polyamine 1.8g, stearic acid
Zinc salt 6g.
The spherical magnetic powder of isotropism forms by mass percentage are as follows: Nd:7.0%~9.5%, B:5%~6%, Ti:
0.2%~0.4%, Zr:0.1%~0.25%, surplus Fe.
(2) magnetic powder is compound: being pre-mixed first, prepares cladding powder by fluidized-bed reactor, uses bisphenol-A type ring
Oxygen resin coats the spherical magnetic powder of isotropism；Then the spherical magnetic powder of isotropism bisphenol A type epoxy resin coated
It is carried out with aromatic polyamine, stearic acid zinc salt using cold mixer dry-mixed, obtains composite magnetic powder.
(3) it suppresses: composite magnetic powder is poured into the cavity of powder compaction press, under the pressure of 0.55GPa, 1.6MA/m's
In axial magnetic field, the highdensity green compact of approximate mesh sheet shape are made in 80 DEG C of temperatures.
(4) solidify: by high density green compact 185 DEG C at a temperature of solidify 20 minutes, obtain the rigid bond magnet of sheet.
(5) drop stamping: drop stamping processing is carried out to sheet rigid bond magnet, under conditions of the pressure of 1GPa, 115 DEG C
Stamp out sheet rigid bond magnet, obtains the isotropism ndfeb magnet of arc.
(6) it rolls: being 90mm by the diameter that the neodymium iron boron magnetic body prepared through the above steps is put into upper roller and lower roll
Two roller sheet mills in, rolled under 70 DEG C of rolling temperature, make it have preferable flexibility, good winding energy
Power.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the essential scope of the present invention also should belong to of the invention
Protection scope.
Claims (10)
1. a kind of neodymium-iron-boron preparation for DC micro-motor, which comprises the following steps:
(1) prepared by cladding powder: taking solids epoxy oligomer and magnetic powder, prepares solids epoxy oligomer using fluidized-bed reactor
The magnetic powder of cladding, the magnetic powder are anisotropy HDDR magnetic powder or the spherical magnetic powder of isotropism；
(2) magnetic powder is compound: the magnetic powder that solids epoxy oligomer is coated is carried out with powder curing agent and lubricant using cold mixer
It is dry-mixed, obtain composite magnetic powder；
(3) it suppresses: composite magnetic powder is poured into the cavity of powder compaction press, under the pressure of 0.4~0.6GPa, 1.5~
In the axial magnetic field of 1.6MA/m, the highdensity green compact of approximate mesh sheet shape are made in 80 DEG C of temperatures；
(4) solidify: by high density green compact 160 DEG C~200 DEG C at a temperature of solidify 20 minutes, obtain the rigid bond magnetic of sheet
Iron；
(5) when the magnetic powder in step (1) is anisotropy HDDR magnetic powder, hot rolling is carried out:
By the rigid bond magnet of sheet by hot-rolling mill 60 DEG C -80 DEG C at a temperature of rolled with the rolling rate of 20%-80%
Slabbing magnet, obtains anisotropic neodymium iron boron magnetic body；
When the magnetic powder spherical for isotropism of the magnetic powder in step (1), drop stamping is carried out:
Drop stamping processing, the punching press under conditions of pressure of 1GPa, 110 DEG C~130 DEG C are carried out to the rigid bond magnet of sheet
Sheet rigid bond magnet obtains the isotropism neodymium iron boron magnetic body of arc.
2. a kind of neodymium-iron-boron preparation for DC micro-motor according to claim 1, which is characterized in that
The anisotropic neodymium iron boron magnetic body with a thickness of 2.0-2.5mm；The inside radius of the isotropism neodymium iron boron magnetic body of the arc,
Outer radius, maximum gauge and maximum length are respectively 3.55mm, 3.65mm, 1.9mm and 5mm.
3. a kind of neodymium-iron-boron preparation for DC micro-motor according to claim 1, which is characterized in that
Neodymium iron boron magnetic body is put into milling train, is rolled under 70 DEG C of rolling temperature.
4. a kind of neodymium-iron-boron preparation for DC micro-motor according to claim 3, which is characterized in that
Neodymium iron boron magnetic body rolling after with a thickness of 1.15mm or so.
5. a kind of neodymium-iron-boron preparation for DC micro-motor according to claim 3, which is characterized in that
The milling train is two roller sheet mills, and the diameter of the roll upper roller and lower roll is 90mm.
6. a kind of neodymium-iron-boron preparation for DC micro-motor according to claim 1, which is characterized in that
The solids epoxy oligomer is selected from brominated bisphenol a type epoxy resin, phenol aldehyde type epoxy resin, bisphenol A type epoxy resin, phenol
One of formaldehyde type asphalt mixtures modified by epoxy resin.
7. a kind of neodymium-iron-boron preparation for DC micro-motor according to claim 1, which is characterized in that
The powder curing agent is selected from one of amino resins, aromatic polyamine, hydrazides, resol, dicyandiamide, acid anhydrides.
8. a kind of neodymium-iron-boron preparation for DC micro-motor according to claim 1, which is characterized in that
The lubricant is stearic acid zinc salt.
9. a kind of neodymium-iron-boron preparation for DC micro-motor according to claim 1, which is characterized in that
When magnetic powder described in step (1) is anisotropy HDDR magnetic powder, anisotropy HDDR magnetic powder, is consolidated solids epoxy oligomer
Agent and the mass percent of lubricant be respectively 96.2~98.1wt%, 1.5~3.0wt%, 0.1~0.3wt%, 0.3~
0.5wt%；
It is the spherical magnetic powder of isotropism, solids epoxy oligomer, solid when magnetic powder described in step (1) is isotropism spherical magnetic powder
Agent and the mass percent of lubricant be respectively 96.1~98.1wt%, 1.5~3.0wt%, 0.1~0.2wt%, 0.3~
0.7wt%.
10. a kind of neodymium-iron-boron preparation for DC micro-motor according to claim 9, feature exist
In,
The anisotropy HDDR magnetic powder forms by mass percentage are as follows: Nd:10%~15%, Dy:0.1%~0.5%, Co:
5%~20%, Zr:0.05%~0.2%, Ga:0.2%~0.9%, B:5%~10%, surplus Fe；
The spherical magnetic powder of isotropism forms by mass percentage are as follows: Nd:7.0%~9.5%, B:5%~6%, Ti:
0.2%~0.4%, Zr:0.1%~0.25%, surplus Fe.
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