KR100509586B1 - A Minimum thickness Magnet and Manufacture Method - Google Patents
A Minimum thickness Magnet and Manufacture Method Download PDFInfo
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- KR100509586B1 KR100509586B1 KR10-2003-0046973A KR20030046973A KR100509586B1 KR 100509586 B1 KR100509586 B1 KR 100509586B1 KR 20030046973 A KR20030046973 A KR 20030046973A KR 100509586 B1 KR100509586 B1 KR 100509586B1
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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
- H01F41/0293—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
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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
- H01F1/0536—Alloys characterised by their composition containing rare earth metals sintered
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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
- H01F1/10—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
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Abstract
본 발명은 두께가 0.6mm 이하의 극소형 두께를 갖는 소결자석을 손쉽고, 용이하게 제작할 수 있도록 하며, 상기 소결자석을 통한 초소형 모터의 실현이 가능하게 될 수 있도록한 극소형 두께를 갖는 소결자석 및 그 제조방법에 관한 것이다.The present invention makes it easy and easy to manufacture a sintered magnet having a very small thickness of 0.6mm or less, and a sintered magnet having a very small thickness to enable the realization of a micro motor through the sintered magnet and It relates to a manufacturing method.
그 기술적인 구성은, 기계 가공의 두께인 1mm 이상으로 제작된 소결자석을 주면에 자석 부착홈이 형성된 원형의 자석 고정지그에 바인더를 이용하여 부착시키며, 상기 자석 고정지그의 자석 부착홈에 부착된 소결자석의 표면을 400 ~ 100 메시(mash)의 연마제를 이용하여 1차 연마를 수행하고, 1차 연마가 완료된 소결자석의 표면은 1000 ~ 400메시의 연마제를 이용하여 2차연마를 수행하며, 2차 연마가 완료된 소결자석의 표면은 재차 1500 ~ 1000메시의 연마제를 이용하여 3차 연마를 수행하여 소결자석의 두께를 0.6mm 이하로 연마한 후, 상기 자석 고정지그와 일체로 소결자석을 50~90℃의 온도로 NaOH등과 같은 알카리성 박리액에 침적시켜 자석 고정지그로 부터 연마된 소결자석을 분리시켜, 회전 연마기에서 모서리 연마를 수행하고, 상기 소결자석의 표면에 20~30㎛의 두께로 Ni를 도금하는 것을 요지로 한다.The technical configuration is to attach a sintered magnet manufactured with a thickness of 1 mm or more, which is a machining thickness, to a circular magnet fixing jig having a magnet attaching groove formed on its main surface using a binder, and attached to the magnet attaching groove of the magnet fixing jig. The surface of the sintered magnet is subjected to primary polishing by using an abrasive of 400 to 100 mesh (mash), and the surface of the sintered magnet that has been subjected to primary polishing is subjected to secondary polishing using an abrasive of 1000 to 400 mesh. After the secondary polishing is completed, the surface of the sintered magnet is subjected to tertiary polishing again using an abrasive of 1500 to 1000 mesh, and the thickness of the sintered magnet is polished to 0.6 mm or less, and then the sintered magnet is integrally formed with the magnet fixing jig. Dipping in an alkaline stripping solution such as NaOH at a temperature of ˜90 ° C. separates the polished sintered magnet from the magnet fixing jig, and performs corner polishing in a rotary polishing machine, and 20 to 30 μm on the surface of the sintered magnet. It is a summary to plate Ni with the thickness of.
Description
본 발명은 희토류계 영구자석 또는 페라이트계 소결자석등과 같은 소결자석의 두께를 0.6mm이하의 극소형 두께로 제조 성형하기 위한 극소형 두께를 갖는 소결자석 및 그 제조방법에 관한 것으로 이는 특히, 소결자석을 일정한 두께로 형성하여 이를 수평 또는 곡면 지그(Jig)에 부착한 후, 연마 및 탈착 공정을 수행하여 제작되는 소결자석의 표면을 Ni도금 처리를 거쳐 극소형두께를 갖는 제작토록 함으로써, 두께가 0.6mm 이하의 극소형 두께를 갖는 소결자석을 손쉽고, 용이하게 제작할 수 있도록 하며, 상기 소결자석을 통한 초소형 모터의 실현이 가능하게 될 수 있도록한 극소형 두께를 갖는 소결자석 및 그 제조방법에 관한 것이다.The present invention relates to a sintered magnet having a very small thickness for manufacturing and molding the thickness of a sintered magnet such as a rare earth permanent magnet or a ferrite sintered magnet to a very small thickness of 0.6 mm or less, and particularly, a sintered magnet By forming a magnet with a certain thickness and attaching it to a horizontal or curved jig, the surface of the sintered magnet produced by polishing and desorption is subjected to Ni plating to have a very small thickness. A sintered magnet having a very small thickness and a method for manufacturing the sintered magnet having a very small thickness of 0.6 mm or less can be easily and easily manufactured, and the micro motor can be realized through the sintered magnet. will be.
일반적으로 알려져 있는 희토류계 영구자석 또는 페라이트계 소결자석등과 같은 영구자석은, 비교적 크기가 작은 소형 스텝 모우터(STEP MOTOR)등에 사용되는 관계로 그 두께가 얇아야 하는 반면에, 상기 소결자석을 극소형으로 제작할 경우 크랙 또는 파손이 발생하게 되어, 그 두께가 1mm 이하의 소결자석 제작이 불가능한 단점이 있는 것이다.Permanent magnets, such as commonly known rare earth permanent magnets or ferrite sintered magnets, should be thin because they are used in relatively small step motors. When manufactured in a very small size is cracks or breakage occurs, the thickness is less than 1mm sintered magnets are impossible to manufacture.
한편, 상기와같은 단점을 개선하여 스텝 모우터등에 사용되는 영구자석의 재질을 달리하므로써, 자석의 제작시 연삭가공이 필요없고, 사용시 자석의 깨어짐이 없는 스텝 모우터용 영구자석을 제조하는 방법이 알려져있다.On the other hand, by improving the above-mentioned disadvantages by changing the material of the permanent magnet used in the step motor, there is no known method for manufacturing the permanent magnet for the step motor that does not require grinding during the manufacture of the magnet, and does not break the magnet during use have.
즉, 대한민국 특허공보 제1989-0005136호에 의하면, 스텝 모우터에 사용하는 영구자석을 제조하기 위하여 Fe-Nd-B자성 분말을 충진재로 사용하면서, 나일론 또는 에폭시 수지중 어느 하나를 선택하여 바인더 수지로 사용하여, 이를 소정온도 예컨대 200~230℃의 온도로 용융시킨 상태에서, 선별해 놓은 Fe-Nd-B자성분말과 혼합시키며, 이와 같이 혼합된 조성물은 별도의 진공 탈포고정을 거쳐 사출성형을 위해 사출 성형기에 주입하고 배향 자장인가 상태에 냉각 추출한 후 탈자시킴으로써, 제작 및 사용시 잘깨어지지 않을 뿐 아니라, 자석의 제작시 별도의 연삭가공이 없이도 사용할 수 있도록 하는 것이다.That is, according to Korean Patent Publication No. 1989-0005136, in order to manufacture a permanent magnet for use in step motors, Fe-Nd-B magnetic powder is used as a filler, and either one of nylon or epoxy resin is selected and a binder resin is used. By using this, it is mixed with the selected Fe-Nd-B magnetic powder in a state in which it is melted at a predetermined temperature such as 200 to 230 ° C, and the mixed composition is subjected to injection molding through a separate vacuum degassing fixation. In order to be injected into an injection molding machine, extracted by cooling in an oriented magnetic field applied state, and demagnetizing, it is not easily broken during manufacture and use, and can be used without a separate grinding process in the manufacture of a magnet.
그러나, 상기와같이 자성체 분말에 나일론 또는 에폭시 수지등을 첨가하여 제작되는 영구자석은, 상기 나일론 또는 에폭시 수지등의 혼합에 따른 자석의 특징인 보자력이 크게 취약하게 되는 단점이 있는 것이다.However, the permanent magnet produced by adding nylon or epoxy resin to the magnetic powder as described above has a disadvantage in that the coercive force, which is a characteristic of the magnet due to the mixing of the nylon or epoxy resin, is greatly weakened.
이에 더하여, 상기와같이 제작되는 영구자석은 사출 성형기를 통해 사출 성형되는 관계로, 역시 극소형 두께를 갖는 자석의 제작은 불가능하게 되며, 이에따라 소형 스텝 모우터의 제작이 어렵게 되는등 많은 문제점이 있었던 것이다.In addition, since the permanent magnet manufactured as described above is injection molded through an injection molding machine, it is impossible to manufacture a magnet having a very small thickness, and accordingly, there are many problems such as making a small step motor difficult. will be.
본 발명은 상기와 같은 종래 문제점을 개선시키기 위하여 안출한 것으로 그 목적은, 희토류계 영구자석 또는 페라이트계 소결자석등과 같은 소결자석의 두께를 0.6mm이하의 극소형 두께로 제작이 가능하도록 하면서도, 상기 극소형 두께의 자석제작시 발생하는 크랙 및 깨어지는 현상을 방지할 수 있도록 하며, 상기 극소형 두께를 갖는 소결자석을 손쉽고, 용이하게 제작할 수 있는 극소형 두께를 갖는 소결자석 제조방법을 제공하는데에 있다.The present invention has been made in order to improve the conventional problems as described above, the object of the present invention, while making the thickness of the sintered magnet, such as rare earth-based permanent magnets or ferrite-based sintered magnets to a very small thickness of 0.6mm or less, It is possible to prevent cracking and cracking occurring during the manufacture of the micro-thickness magnet, and to provide a sintered magnet manufacturing method having a micro-thickness that can be easily and easily produced the sintered magnet having a very small thickness. Is in.
또한, 본 발명은 상기와같은 극소형 두께를 갖는 소결자석을 통하여 초소형 모터의 실현이 가능하게 될 수 있는 극소형 두께를 갖는 소결자석을 제공하는데에 있다.In addition, the present invention is to provide a sintered magnet having a very small thickness that can be realized through the sintered magnet having a very small thickness as described above.
상기와 같은 목적을 달성하기 위한 기술적인 수단으로서 본 발명은, 희토류계 영구자석 또는 페라이트계 소결자석등과 같은 소결자석을 기계 가공의 두께인 1mm 이상으로 제작한 후, 상기 소결자석을 주면(柱面)에 자석 부착홈이 형성된 원형의 자석 고정지그에 바인더를 이용하여 부착시키는 단계;As a technical means for achieving the above object, the present invention, after producing a sintered magnet, such as a rare earth permanent magnet or a ferritic sintered magnet to 1mm or more of the thickness of the machining, the main surface of the sintered magnet Attaching to a circular magnet fixing jig having a magnet attachment groove formed on the surface;
상기 자석 고정지그의 자석 부착홈에 부착된 소결자석의 표면을 400 ~ 100 메시(mash)의 연마제를 이용하여 1차 연마를 수행하고, 1차 연마가 완료된 소결자석의 표면은 1000 ~ 400메시의 연마제를 이용하여 2차연마를 수행하며, 2차 연마가 완료된 소결자석의 표면은 재차 1500 ~ 1000메시의 연마제를 이용하여 3차 연마를 수행하여 소결자석의 두께를 0.6mm 이하로 연마하는 단계;The surface of the sintered magnet attached to the magnet attachment groove of the magnet fixing jig is subjected to primary polishing using an abrasive of 400 to 100 mesh, and the surface of the sintered magnet having the primary polishing completed is 1000 to 400 mesh. Performing a second polishing using an abrasive, and performing a third polishing on the surface of the sintered magnet after the second polishing is completed, using a polishing agent of 1500 to 1000 mesh to polish the thickness of the sintered magnet to 0.6 mm or less;
상기 연마작업이 완료되면, 자석 고정지그와 일체로 소결자석을 50~90℃ 온도로 NaOH등과 같은 알카리성 박리액에 침적시켜 자석 고정지그로 부터 연마된 소결자석을 분리시키는 단계;When the polishing operation is completed, the step of separating the polished sintered magnet from the magnet fixing jig by immersing the sintered magnet integrally with the magnet fixing jig in an alkaline peeling solution such as NaOH at a temperature of 50 ~ 90 ℃;
분리 완료된 소결자석은 회전 연마기에서 모서리 연마를 수행한 후, 상기 소결자석의 표면에 20~30㎛ 두께로 바렐식 Ni를 도금하는 단계;를 포함하여 제조됨을 특징으로 하는 극소형 두께를 갖는 소결자석 제조방법을 마련함에 의한다.The separated sintered magnet is subjected to edge polishing in a rotary polishing machine, and plating the barrel-type Ni with a thickness of 20 to 30 μm on the surface of the sintered magnet; Sintered magnet having a very small thickness, characterized in that it is produced, including By preparing a manufacturing method.
또한, 본 발명은 소결자석은 두께 0.6mm이하로 형성되며, 그 표면으로 발렐식 Ni 도금층이 형성되는 것을 특징으로 하는 극소형 두께를 갖는 소결자석을 마련함에 의한다.In addition, the present invention is to provide a sintered magnet having a micro-thickness, characterized in that the sintered magnet is formed to a thickness of 0.6mm or less, the surface is formed of a barrel-type Ni plating layer.
이하, 첨부도면에 의거하여 본 발명의 바람직한 실시예를 상세히 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 극소형 두께를 갖는 소결자석 제조방법을 설명하기 위한 원형의 자석 고정지그의 개략 구성도이고, 도 2는 본 발명인 극소형 두께를 갖는 소결자석의 요부 단면 구조도로서, 희토류계 영구자석 또는 페라이트계 소결자석등과 같은 소결자석(10)을 기계 가공의 두께인 1mm 이상으로 제작한 후, 상기 소결자석(10)을 주면(柱面)에 자석 부착홈(20)이 형성된 원형의 자석 고정지그(30)에 바인더를 이용하여 부착시키게 되며, 이때 상기 바인더는 약 10㎛ 이하의 두께로 상기 자석 부착홈(20)에 도포하여 구형 소결자석(10)을 부착 경화시킨다.1 is a schematic configuration diagram of a circular magnet fixing jig for explaining a method of manufacturing a sintered magnet having a very small thickness according to the present invention, and FIG. 2 is a schematic cross-sectional structural view of a sintered magnet having a very small thickness according to the present invention. After the sintered magnet 10, such as permanent magnets or ferritic sintered magnets, is manufactured to a thickness of 1 mm or more, which is the thickness of the machining process, the magnet attaching grooves 20 are formed on the main surface of the sintered magnets 10. The binder is attached to the circular magnet fixing jig 30 by using a binder. At this time, the binder is applied to the magnet attachment groove 20 to a thickness of about 10 μm or less to harden the spherical sintered magnet 10.
상기와같이, 자석 고정지그(30)의 자석 부착홈(20)내부에 부착된 소결자석(10)은 그 상부 표면을 400 ~ 100 메시(mash)의 연마제 또는 연삭지를 이용하여 1차 거친 연마작업을 수행한 후, 상기 1차 연마가 완료된 소결자석(10)의 표면은 1000 ~ 400메시의 연마제 또는 연삭지를 이용하여 2차 중간연마 작업을 수행한다.As described above, the sintered magnet 10 attached to the inside of the magnet attachment groove 20 of the magnet fixing jig 30 has a first rough polishing operation using an abrasive or grinding paper of 400 to 100 mesh (mash) on its upper surface. After performing the first polishing, the surface of the sintered magnet 10 is completed, the secondary intermediate polishing operation is performed using an abrasive or grinding paper of 1000 to 400 mesh.
계속해서, 상기와같이 2차 연마가 완료된 소결자석(10)의 표면은 재차 1500 ~ 1000메시의 고운 연마제 또는 연삭지를 이용하여 3차 연마를 수행하여 소결자석의 두께를 0.6mm 이하로 연마하게 되며, 이때 상기와같이 3단계의 연마작을 통해 소결자석(10)이 크랙이 발생되거나, 깨지지 않고 순차적으로 연마될 수 있도록 한다.Subsequently, the surface of the sintered magnet 10 having the secondary polishing completed as described above is subjected to tertiary polishing using a fine abrasive or grinding paper of 1500 to 1000 mesh again to polish the thickness of the sintered magnet to 0.6 mm or less. In this case, as described above, the sintered magnet 10 may be polished sequentially without cracking or breaking through the three-step polishing operation.
한편, 상기와같이 소결자석의 연마작업이 완료되면, 상기 자석 고정지그(30)와 일체로 부착된 소결자석(10)을 약 50~90℃온도의 NaOH등과 같은 알카리성 박리액에 침적시켜 자석 고정지그(30)로 부터 연마된 소결자석(10)을 분리시키게 되며, 이때 상기 알카리성 박리액은 물에 약 3~15%를 혼합하여 사용하게 되며, 상기 온도가 50℃ 이하에서는 소결자석의 박리가 일어나지 않게되고, 온도가 90℃ 이상으로 형성될 경우, 두께가 0.6mm이하로 형성되는 극소형 소결자석이 쉽게 열화될 수 있는 것이다.On the other hand, when the polishing operation of the sintered magnet is completed as described above, the magnet is fixed by immersing the sintered magnet 10 attached integrally with the magnet fixing jig 30 to an alkaline peeling solution such as NaOH at a temperature of about 50 to 90 ° C. The polished sintered magnet 10 is separated from the jig 30, and the alkaline peeling solution is used by mixing about 3 to 15% with water. When the temperature is 50 ° C. or less, the sintered magnet 10 is separated. When the temperature is formed at 90 ° C. or more, the micro sintered magnet, which is formed at a thickness of 0.6 mm or less, may be easily deteriorated.
상기와같이 자석 고정지그(30)로 부터 분리 완료된 소결자석(10)은, 회전 연마기에서 모서리 연마작업을 수행한 후, 상기 소결자석(10)의 표면에 20~30㎛의 두께로 회전 바렐식으로 Ni를 도금처리 함으로써 도 2에서와같은 극소형 두께를 갖는 소결자석을 제작할 수 있는 것이다.The sintered magnet 10 separated from the magnet fixing jig 30 as described above, after performing a corner grinding operation in a rotary polishing machine, rotates the barrel to a thickness of 20 ~ 30㎛ on the surface of the sintered magnet 10 By plating Ni, a sintered magnet having a very small thickness as shown in FIG. 2 can be manufactured.
다른 한편, 도 3은 본 발명의 다른 실시예에 의한 평판형의 자석 고정지그의 개략 구성도로서, 상기 일실시예에서와 같이 소결자석(10)이 구형이 아닌 평판형일 경우, 이를 부착하여 지지 고정한 후, 상기 일실시예와 동일한 연마작업을 수행하는 자석 고정지그(30)와 상기 소결자석이 바인더로서 부착되는 자석 부착홈(20)을 평판형으로 구성할 수 있는 것이다. On the other hand, Figure 3 is a schematic configuration diagram of a plate-shaped magnet fixing jig according to another embodiment of the present invention, when the sintered magnet 10 is not a spherical plate shape as in the embodiment, it is attached and supported After fixing, the magnet fixing jig 30 and the magnet attachment groove 20 to which the sintered magnet is attached as a binder may be formed in a flat plate type.
이상과 같이 본 발명인 극소형 두께를 갖는 소결자석 및 그 제조방법에 의하면, 희토류계 영구자석 또는 페라이트계 소결자석등과 같은 소결자석의 두께를 0.6mm이하의 극소형 두께로 제작이 가능하도록 하면서도, 상기 극소형 두께의 자석제작시 발생하는 크랙 및 깨어지는 현상을 방지할 수 있도록 하며, 상기 극소형 두께를 갖는 소결자석을 손쉽고, 용이하게 제작할 수 있음은 물론, 상기와같은 극소형 두께를 갖는 소결자석을 통하여 초소형 모터의 실현이 가능하게 될 수 있는 우수한 효과가 있다. As described above, according to the present invention, the sintered magnet having a very small thickness and a method of manufacturing the same, while the thickness of the sintered magnet such as a rare earth permanent magnet or a ferrite sintered magnet can be manufactured to a very small thickness of 0.6 mm or less, It is possible to prevent cracks and cracking occurring during the manufacture of the micro-thick magnet, and to easily and easily manufacture the sintered magnet having the micro-thickness, as well as the sintering having the micro-thickness as described above. There is an excellent effect that the realization of a micro motor can be realized through the magnet.
본 발명은 특정한 실시예에 관련하여 도시하고 설명하였지만, 이하의 특허청구의 범위에 의해 마련되는 본 발명의 정신이나 분야를 벗어나지 않는 한도내에서 본 발명이 다양하게 개조 및 변화될수 있다는 것을 당업계에서 통상의 지식을 가진자는 용이하게 알수 있음을 밝혀두고자 한다.While the invention has been shown and described with respect to specific embodiments thereof, it will be appreciated that various changes and modifications can be made in the art without departing from the spirit or scope of the invention as set forth in the following claims. Those of ordinary skill will want to know easily.
도 1은 본 발명에 따른 극소형 두께를 갖는 소결자석 제조방법을 설명하기 위한 원형의 자석 고정지그의 개략 구성도.1 is a schematic configuration diagram of a circular magnet fixing jig for explaining a method of manufacturing a sintered magnet having a very small thickness according to the present invention.
도 2는 본 발명인 극소형 두께를 갖는 소결자석의 요부 단면 구조도.2 is a cross-sectional structural view of the main portion of the sintered magnet having a very small thickness of the present invention.
도 3은 본 발명의 다른 실시예에 의한 평판형의 자석 고정지그의 개략 구성도.3 is a schematic configuration diagram of a plate-shaped magnet fixing jig according to another embodiment of the present invention.
*도면의 주요부위에 대한 부호설명* Explanation of Signs of Major Parts of Drawings
10...소결자석 20...자석 부착홈10 ... sintered magnet 20 ... magnet mounting groove
30...자석 고정지그30.Magnet fixing jig
Claims (5)
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