CN1138735A - Method of manufacturing magnets - Google Patents
Method of manufacturing magnets Download PDFInfo
- Publication number
- CN1138735A CN1138735A CN96100326A CN96100326A CN1138735A CN 1138735 A CN1138735 A CN 1138735A CN 96100326 A CN96100326 A CN 96100326A CN 96100326 A CN96100326 A CN 96100326A CN 1138735 A CN1138735 A CN 1138735A
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- aforementioned
- permanent magnet
- blank pipe
- anisotropy
- aforesaid
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 238000000465 moulding Methods 0.000 claims abstract 2
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 238000001192 hot extrusion Methods 0.000 claims description 15
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 13
- 229910052723 transition metal Inorganic materials 0.000 claims description 13
- 150000003624 transition metals Chemical class 0.000 claims description 13
- 230000005291 magnetic effect Effects 0.000 claims description 12
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 10
- 229910052796 boron Inorganic materials 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims 1
- 238000009702 powder compression Methods 0.000 claims 1
- 239000006247 magnetic powder Substances 0.000 abstract 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 10
- 238000005245 sintering Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 230000005298 paramagnetic effect Effects 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
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
- H01F41/0253—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
-
- 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
- H01F1/0551—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 in the form of particles, e.g. rapid quenched powders or ribbon flakes
-
- 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
- H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
- H01F1/0557—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together sintered
-
- 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
- H01F41/0293—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 diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The invention provides a method of manufacturing an anisotropic resin permanent magnet which makes it possible to form an anisotropic permanent magnet of an inexpensive metallic hollow tube without using an expensive molding die and ground into power, and the powder and resin are mixed together and formed into an anisotropic resin permanent magnet. An anisotropic permanent magnet is manufactured through following three processes, a first process where magnetic powder is filled up into a hollow tube to the brim, a second process where the magnetic powder and the hollow tube are hot-compressed together at temperatures of 400 to 1000 deg.C to turn the magnetic powder into a permanent magnet of high density, and a third process where the permanent magnet is hot- processed to turn magnetically anisotropic for the formation of an anisotropic permanent magnet.
Description
The present invention relates to Permanent Magnnet Manufacturing Approach.Be characterized in the Magnaglo in the pipe is carried out hot extrusion to make high-density isotropic magnet, again with the Permanent Magnnet Manufacturing Approach of its hot working with the acquisition magnetic anisotropy, and pulverize the anisotropy permanent magnet and make anisotropic powder, mix then with resin material, extrude and extrude shaping again and make its plastic deformation, and make the method for anisotropy permanent magnet.
Up to now, the manufacture method of the permanent magnet of the RE-TM-B that is generally made by one or more rare earth elements (RE), one or more transition metal (TM) and boron element (B) is summarized two kinds.A kind of method is that the powder that the ingot bar with RE-TM-B series permanent magnet is ground into is shaped in magnetic field, in temperature sintering and heat treatment more than 1000 ℃, is referred to as so-called sintering process.But adopt this method, its dusty material must at high temperature be handled, so will spend high manufacturing expense, especially also has the drawback of the easy oxidation of material.
Another kind method is molten alloy to be solidified rapidly and obtain Magnaglo noncrystal or the fine crystal particle to fill metal pattern, carry out hot extrusion then and make highdensity isotropism permanent magnet formed body, again this isotropism permanent magnet formed body is put into the upsetting metal pattern or under the state of not putting into mould, under 700 ℃ of temperature, carry out hot working greatly, thereby make the anisotropy permanent magnet.The method is referred to as so-called hot working method.It is compared with above-mentioned sintering process then and makes than being easier to, and the material oxidation possibility is also little.But the upsetting metal pattern that hot extrusion metal pattern and/or hot working are used must be worked in HTHP repeatedly, thereby metal pattern is yielding and damage.For reducing the metal pattern distortion as far as possible and damaging, must use high strength and high hardness material to make metal pattern.Especially because the size and the shape of magnet are diversified, so make the metal pattern of hard material, cost is very high, makes also very difficulty.
Main purpose of the present invention provides a kind of metal pattern that need not high price, and makes the method for anisotropy permanent magnet with metal tubes such as copper and stainless steels, and its is pulverized back and mixed with resin, the method for manufacturing anisotropy resin permanent magnet again.
For achieving the above object, according to Permanent Magnnet Manufacturing Approach of the present invention, to utilize a pressue device that is equipped with pressing element at least, make the permanent magnet that contains one or more rare earth elements, one or more transition metal and boron element.It is characterized in that it comprises the following steps:
The Magnaglo that will contain aforementioned one or more rare earth elements and aforementioned one or more transition metal and aforementioned boron element is filled blank pipe, and this is the first step.
For making aforementioned Magnaglo become highdensity aforementioned permanent magnet, under 400-1000 ℃ of temperature, utilizing aforementioned pressing element only to add once presses, be about to aforementioned Magnaglo and aforesaid blank pipe together hot extrusion finish, because hot working makes aforementioned permanent magnet have magnetic anisotropy, thereby generate the anisotropy permanent magnet, this was second step.
In addition, the present invention comprises that also following feature is to constitute the method for resin anisotropic magnet.
Remove the 3rd step of aforementioned blank pipe.
Pulverizing aforementioned anisotropy permanent magnet becomes the 4th step of anisotropic powder.
With mixed the 5th step of aforementioned anisotropic powder with resin.
Mix the 6th step that applies the magnetic field compression molding with the aforementioned anisotropy permanent magnet powder of resin aforementioned.
Below, embodiments of the invention are elaborated with reference to the accompanying drawings:
Figure 1A-E is the profile of the Permanent Magnnet Manufacturing Approach of explanation first embodiment of the invention.
Fig. 2 A-C is the profile of the Permanent Magnnet Manufacturing Approach of explanation second embodiment of the invention.
Fig. 3 A-B is the profile of the Permanent Magnnet Manufacturing Approach of explanation third embodiment of the invention.
Fig. 4 A-D is the profile of the Permanent Magnnet Manufacturing Approach of explanation fourth embodiment of the invention.
Fig. 5 A-D is the profile of the Permanent Magnnet Manufacturing Approach of explanation fifth embodiment of the invention.
Fig. 6 illustrates that the anisotropy permanent magnet of aforementioned each embodiment manufacturing of the present invention is pulverized the permanent magnet powder that obtains to be mixed with (as Fig. 6 A) after the resin, and in addition the method for anisotropy resin permanent magnet (as Fig. 6 B) is made in magnetic field again.
Label declaration is as follows:
10,50 ferromagnetic powders
12,52,72 blank pipes
14,54,74 isotropism permanent magnet formed bodies
16,56,76 anisotropy permanent magnets
20 thermal-squeezing devices
22,32 top drifts
24,34 bottom drifts
26,36 heaters
30 upsetting devices
60 anisotropy permanent magnet powder
80 pressurizing units
Fig. 1 is the constructed profile that provides for the explanation first embodiment of the invention.Figure 1A illustrates the process that Magnaglo 10 is full of blank pipe 12.Figure 1B illustrates in order to obtain highdensity isotropism permanent magnet formed body 14, and the process that Magnaglo 10 is carried out hot extrusion.In order to obtain the anisotropy permanent magnet, shown in Fig. 1 C and Fig. 1 D, isotropism permanent magnet formed body can be carried out hot working.Hot working is undertaken by the upsetting operation, and it makes isotropism permanent magnet formed body 14 have magnetic anisotropy.
In manufacture method of the present invention, can adopt the material of forming by one or more rare earth elements (RE) and one or more transition metal (TM) and boron element.Rare earth element is with neodymium (Nd) substantially, but also can partly or entirely use praseodymium (Pr) instead.Though transition metal is used iron (Fe) always, also can partly or entirely use cobalt (Co) instead.
Magnaglo 10 is permanent magnet material powder that the molten alloy quench cooled of the permanent magnet material of RE-TM-B is caused.Blank pipe 12 is to make according to big or small shaping of the shape of the anisotropy permanent magnet 16 that will make.This blank pipe 12 preferably is higher than the Magnaglo 10 that charges into.And blank pipe 12 the most handy paramagnetic metals and nonmagnetic metal manufacturing, for example copper or stainless steel, but also can make by the ferromagnetism metal.
Shown in Figure 1A, thermal-squeezing device 20 is made up of top drift 22 and bottom drift 24 and heater 26.Top drift 22 can be made the structure of lucky embedding blank pipe 12.But be preferably made with blank pipe 12 inwalls gappedly, like this, top drift 22 can be frustrated in blank pipe 12.In the first embodiment of the present invention, top drift 22 is columniform.Please note that this shape is the section shape corresponding to blank pipe 12, it can have diversified shape.Top drift 22 is connecting the pressue device (not shown).Same bottom drift 24 also can be made the structure in the lucky embedding blank pipe 12.But in order to make blank pipe 12 embed bottom drift 24 easily, bottom drift 24 also is preferably made with blank pipe 12 inwalls a gap.The section of blank pipe 12 with the shape correspondence of the bottom drift 24 in the sample example, but it can certainly there be diversified change of shape.Bottom drift 24 is also connecting pressue device.Heater 26 surrounds top drift 22, bottom drift 24 and blank pipe 12.
Fig. 1 C represents upsetting device 30.Top drift 32, bottom drift 34 and heater 36 are arranged in this upsetting device 30.The tabular surface 33 of upper punch 32 and the tabular surface of low punch 34 35 want more roomy, so that can cover workpiece fully.And top drift 32 and bottom drift 34 are being connected (not shown) with pressue device respectively.Heater 36 surrounds upsetting device 30.
Manufacture method shown in the first embodiment of the invention is described as follows.Shown in Figure 1A,, top drift 22 is placed the extreme higher position as far as possible at first, blank pipe 12 is embedded on the bottom drift 24 securely, use loading hopper (end illustrates among the figure) that Magnaglo 10 is filled blank pipe 12 then for blank pipe 12 is installed easily.
After filling Magnaglo 10, carry out the hot extrusion operation, promptly shown in Figure 1B, under 400-1000 ℃ temperature, (be preferably in 700-800 ℃ temperature) top drift 22 is moved downwards, to Magnaglo 10 pressurizations, 0.1-0.5 ton/square centimeter (t/cm for example pressurizes
2), and produce high-density isotropic permanent magnet formed body 14.Institute's plus-pressure changes according to the strength of materials and the thickness of blank pipe.Heating can be heated by resistive device 26 and carry out.If be lower than 400 ℃, processing characteristics is descended, if than 1000 ℃ of temperature height, then particle can become thick.Behind the extrusion molding, as far as possible top drift 22 is returned the extreme higher position, blank pipe 12 tops (being that formed body 14 height are with top) suitable instrument with saw one class is cut away, and then from blank pipe 12, take out isotropism permanent magnet formed body 14.
Shown in Fig. 1 C-Fig. 1 E, carry out under the occasion of necessity, imposing the upsetting operation after the hot extrusion operation.For example isotropism permanent magnet formed body 14 is placed on the bottom drift 34 of upsetting device 30 with the appropriate device of manipulator one class.And then top drift 32 is mobile downwards, under the temperature of 400-1000 ℃ (being preferably in 700-800 ℃), to the pressurization of isotropism permanent magnet, for example about 2 tons of/square centimeter (t/cm
2) pressure.Temperature is obtained by heater 36.In above-mentioned pressure process, make 14 plastic deformations of isotropism permanent magnet formed body, and highly reduce.Owing to plastic deformation isotropism permanent magnet formed body 14 has had anisotropy to become anisotropy permanent magnet 16.The easy magnetizing axis of anisotropy permanent magnet 16 approximately is the parallel axes with compression aspect.This anisotropy permanent magnet 16 is pulverized, also can be made anisotropy permanent magnet powder.
Fig. 2 represents the profile of the second embodiment of the invention relevant with the upsetting operation.The upsetting device 30 of Fig. 2 A and Fig. 1 C's is same.Details are as follows:
After hot extrusion obtained isotropism permanent magnet formed body 14, for example the instrument with saw one class cut away the part that grows of blank pipe 12, and only stays isotropism permanent magnet formed body 14 height parts, shown in Fig. 2 A, begins to carry out the upsetting operation.Blank pipe 12 and isotropism permanent magnet formed body 14 are carried out hot working together, then obtain by blank pipe 12 cingens anisotropy permanent magnets 16.After this, if anisotropic magnet 16 is still stayed in the blank pipe 12, when magnetizing a class operation, then can prevent the damage of permanent magnet.
Fig. 3 represents the profile of the third embodiment of the present invention.The structure of the thermal-squeezing device 20 shown in Fig. 3 A is identical with the structure of Figure 1A shown device.Among the 3rd embodiment, can obtain anisotropy permanent magnet 16 by single hot extrusion.Promptly after carrying out the technology of aforesaid Figure 1A and Figure 1B equally, do not cut away the part that grows of blank pipe 12, and proceed the hot extrusion operation.And then the part that grows of cutting away blank pipe 12, and obtain blank pipe 12 cingens anisotropy permanent magnets 16.Fig. 4 represents the profile of the fourth embodiment of the present invention.As shown in the figure, hot extrusion operation and upsetting operation are only to be undertaken by a process of top drift 32.Promptly be, top drift 32 is moved downwards, blank pipe 52 and the Magnaglo 50 that is filled to equal height are extruded with blank pipe 52,50 of Magnaglos become highdensity isotropism permanent magnet formed body 54, and then continue pressurization, just can obtain blank pipe 12 cingens anisotropy permanent magnets 56.
Fig. 5 represents the profile of the fifth embodiment of the present invention.Comprised two steps at this embodiment: the step of inserting isotropism permanent magnet formed body 74 in blank pipe 72 reaches in order to make it have magnetic anisotropy isotropism permanent magnet formed body 74 hot worked steps.
Shown in Fig. 5 A, the isotropism permanent magnet formed body 74 of using method manufacturing in the past is inserted in the blank pipe 72.The height of blank pipe 72 is roughly identical with isotropism permanent magnet formed body 74.Blank pipe 72 is packed into behind the isotropism permanent magnet formed body 74, shown in Fig. 5 B, it is contained on the bottom drift 34, then again, make its plastic deformation with 74 pressurizations of the isotropism permanent magnet formed body in 32 pairs of blank pipes 72 of top drift, so just can produce anisotropy permanent magnet 76.
The anisotropy permanent magnet of making by aforementioned each embodiment after removing blank pipe, is pulverized and is become the powder 60 of anisotropy permanent magnet as shown in Figure 6A., in the powder of this anisotropy permanent magnet, mix with resin thereafter, on common pressurizing unit 80 with 1 ton of/square centimeter (t/cm
2) above pressure, make its extrusion molding.Owing to apply magnetic field more than 10 kilo-oersteds (KOe) simultaneously, and produce the anisotropy resin permanent magnet 90 shown in Fig. 6 B at this.
Above although understand specific embodiment of the present invention, the technical staff can revise above-mentioned technical process under the prerequisite of the claim scope that does not break away from the record of this specification certainly.
Technique effect of the present invention is, without hot extrusion metal die and upsetting Forging mould just can be made anisotropy permanent magnet and anisotropy tree effectively The fat permanent magnet.
Claims (12)
1, a kind of manufacture method of permanent magnet has a pressing element at least in the pressue device of employing, contain one or more rare earth elements, at least a or multiple transition metal and boron element in the permanent magnet of manufacturing at least; It is characterized in that this method comprises the following steps:
The first step: the Magnaglo that will close aforesaid one or more rare earth elements, aforesaid one or more transition metal and aforesaid boron element is filled in a blank pipe;
Second step: for aforesaid Magnaglo being made highdensity aforementioned permanent magnet, utilize aforesaid pressing element, under 400-1000 ℃ temperature, only add once and press, just aforementioned Magnaglo and aforementioned blank pipe hot extrusion are together finished, thereby and make the anisotropy permanent magnet owing to hot working makes aforementioned permanent magnet have anisotropy.
2, the Permanent Magnnet Manufacturing Approach of putting down in writing according to claim 1 is characterized in that, also comprises:
Remove the 3rd step of aforementioned blank pipe;
Pulverize aforesaid anisotropy permanent magnet, make the 4th step of anisotropic powder;
With the 5th step of mixing in the aforementioned anisotropic powder with resin;
To be mixed with the 6th step of aforementioned anisotropy permanent magnet powder compression molding in magnetic field of resin again.
3, according to the Permanent Magnnet Manufacturing Approach of claim 1 record, it is characterized in that aforesaid blank pipe is made of metal.
4, according to the Permanent Magnnet Manufacturing Approach of claim 1 record, it is characterized in that aforesaid hot extrusion and aforesaid hot procedure are carried out under 700-1000 ℃ of temperature.
5, utilize first and second pressue device that has at least one pressing element respectively, make the Permanent Magnnet Manufacturing Approach that contains one or more rare earth elements, one or more transition metal and boron element, it is characterized in that this method comprises the following steps:
The aforementioned Magnaglo that contains one or more rare earth elements, one or more transition metal and boron element is filled the first step of blank pipe;
For making aforementioned Magnaglo become highdensity magnet formed body, under 400-1000 ℃ of temperature,, the aforementioned Magnaglo of filling in the aforementioned blank pipe is carried out second step of hot extrusion with the aforementioned pressing element in aforementioned first pressue device;
Cut away the 3rd step of the above aforementioned blank pipe part of aforementioned magnet formed body height;
In order to make aforementioned magnet formed body magnetic anisotropy, under aforementioned 400-1000 ℃ temperature, utilize aforementioned pressing element in aforementioned second pressue device with aforementioned magnet formed body and hot worked together the 4th step of aforementioned blank pipe.
6, according to the Permanent Magnnet Manufacturing Approach of claim 5 record, it is characterized in that, also comprise: the 5th step of removing aforementioned hollow tube; Pulverize aforementioned anisotropy formed body, make the 6th step of anisotropic powder; With mixed the 7th step of anisotropic powder, reach the 8th step that the aforementioned anisotropic powder that is mixed with aforementioned resin is added magnetic field and compression molding with resin.
7, according to the Permanent Magnnet Manufacturing Approach of claim 5 record, it is characterized in that aforementioned blank pipe is with metal.
According to the Permanent Magnnet Manufacturing Approach of claim 5 record, it is characterized in that 8, aforementioned hot extruding and aforementioned hot processing are carried out under 700-1000 ℃ of temperature.
9, a kind of Permanent Magnnet Manufacturing Approach utilizes the pressue device that has a pressing element at least, makes the permanent magnet that contains at least a or multiple rare earth element, at least a or multiple transition metal and boron element and it is characterized in that it may further comprise the steps:
The aforementioned isotropism permanent magnet formed body that contains one or more rare earth elements, one or more transition metal and boron element is full of the first step of blank pipe;
Become the anisotropy permanent magnet in order to make aforementioned anisotropy permanent magnet formed body plastic deformation, under 400-1000 ℃ of temperature, utilize aforesaid pressing element, with aforementioned isotropism permanent magnet formed body and hot worked together second step of aforesaid blank pipe.
10, according to the Permanent Magnnet Manufacturing Approach of claim 9 record, it is characterized in that this method also comprises: the 3rd step of removing aforementioned blank pipe; Pulverize aforementioned anisotropy formed body, make the 4th step of anisotropic powder; With mixed the 5th step of aforementioned anisotropic powder with resin; Mix the 6th step that applies magnetic field and compression molding with the aforementioned anisotropic powder of resin aforementioned.
11, according to the Permanent Magnnet Manufacturing Approach of claim 9 record, it is characterized in that aforementioned blank pipe is with metal.
According to the Permanent Magnnet Manufacturing Approach of claim 9 record, it is characterized in that 12, aforementioned hot extruding and aforementioned hot processing are carried out under 700-1000 ℃ of temperature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950016210A KR0159651B1 (en) | 1995-06-19 | 1995-06-19 | Method for manufacturing a magnet made from anisotropic rare earth |
| KR16210/1995 | 1995-06-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1138735A true CN1138735A (en) | 1996-12-25 |
Family
ID=19417448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96100326A Pending CN1138735A (en) | 1995-06-19 | 1996-01-10 | Method of manufacturing magnets |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2816130B2 (en) |
| KR (1) | KR0159651B1 (en) |
| CN (1) | CN1138735A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105312574A (en) * | 2014-07-08 | 2016-02-10 | 丰田自动车株式会社 | Manufacturing method for sintered compact |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5786708B2 (en) * | 2011-12-28 | 2015-09-30 | トヨタ自動車株式会社 | Rare earth magnet manufacturing method |
| TWI615859B (en) * | 2016-10-14 | 2018-02-21 | 財團法人金屬工業研究發展中心 | Anisotropic magnet manufacturing method and magnet manufacturing equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62263947A (en) * | 1986-05-12 | 1987-11-16 | Inoue Japax Res Inc | Manufacture of magnet |
| JPH01175207A (en) * | 1987-12-28 | 1989-07-11 | Seiko Epson Corp | Manufacture of permanent magnet |
| JPH01248503A (en) * | 1988-03-29 | 1989-10-04 | Daido Steel Co Ltd | Manufacture of r-fe-b family anisotropy magnet |
| JPH0444301A (en) * | 1990-06-12 | 1992-02-14 | Seiko Epson Corp | Manufacture of rare-earth permanent magnet |
| JPH06105504A (en) * | 1992-09-21 | 1994-04-15 | Honda Motor Co Ltd | Manufacture of permanent magnet member for motor |
-
1995
- 1995-06-19 KR KR1019950016210A patent/KR0159651B1/en not_active IP Right Cessation
-
1996
- 1996-01-10 CN CN96100326A patent/CN1138735A/en active Pending
- 1996-01-10 JP JP8019408A patent/JP2816130B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105312574A (en) * | 2014-07-08 | 2016-02-10 | 丰田自动车株式会社 | Manufacturing method for sintered compact |
Also Published As
| Publication number | Publication date |
|---|---|
| KR970003294A (en) | 1997-01-28 |
| JP2816130B2 (en) | 1998-10-27 |
| JPH097871A (en) | 1997-01-10 |
| KR0159651B1 (en) | 1998-12-15 |
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