JPH09129463A - Manufacturing method and device of rare earth cylindrical magnet material - Google Patents
Manufacturing method and device of rare earth cylindrical magnet materialInfo
- Publication number
- JPH09129463A JPH09129463A JP7280861A JP28086195A JPH09129463A JP H09129463 A JPH09129463 A JP H09129463A JP 7280861 A JP7280861 A JP 7280861A JP 28086195 A JP28086195 A JP 28086195A JP H09129463 A JPH09129463 A JP H09129463A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- punch
- rare earth
- blank
- die
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- H01F41/028—Radial anisotropy
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、希土類磁石とくに
Ｎｄ−Ｆｅ−Ｂ系の粉末焼結磁石の筒状の素材を製造す
る方法および装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a cylindrical material of a rare earth magnet, particularly an Nd-Fe-B system powder sintered magnet.
【０００２】[0002]
【従来の技術】Ｎｄ−Ｆｅ−Ｂ系の磁石において、とく
に押圧成形によりラジアル異方性をもたせたものは、リ
ング状の磁石の素材として有用である。 従来、この種
の磁石素材の製造は、希土類磁石合金の超急冷リボンを
粉砕して得た粉末を材料とし、これを冷間で圧粉成形
し、圧粉成形体をホットプレスして密度を高めたものを
ブランク（１）として使用し、図１に示すようにこのブ
ランク（１）をダイ（４）に装填し、インナーパンチ
（５１）で押圧して図２に示すような後方押出しを行な
ってカップ状体（２）とし、図３に示すように孔あけパ
ンチ（５３）でカップ底部を打ち抜く工程に従って実施
している。 このとき、加工率は、ブランクの断面積Ｓ
ｏ、押出加工後の断面積Ｓとするとき、(１−Ｓ／Ｓ
ｏ）×１００（％)で定義される断面減少率にして６０
％程度が達成されるように加工するのが適切とされてい
る。2. Description of the Related Art Nd-Fe-B based magnets, particularly those having radial anisotropy by press molding, are useful as materials for ring-shaped magnets. Conventionally, this kind of magnet material is manufactured by using powder obtained by crushing a super-quenched ribbon of rare earth magnet alloy as a material, cold compacting this, and hot pressing the compact to reduce the density. The elevated one is used as a blank (1), and the blank (1) is loaded into a die (4) as shown in FIG. 1 and is pressed by an inner punch (51) to perform backward extrusion as shown in FIG. The cup-shaped body (2) is formed by performing the process according to the step of punching the bottom of the cup with the punching punch (53) as shown in FIG. At this time, the processing rate is the sectional area S of the blank.
o, assuming that the cross-sectional area S after extrusion is (1-S / S
o) x 100 (%) as the cross-sectional reduction rate defined by 60
It is said that it is appropriate to process so that about 100% is achieved.
【０００３】この製造法は、カップの底に当る部分は切
捨てるほかなく、従ってブランクからリング状磁石への
歩留りが低いという欠点がある。 押出しに際してはア
ウターパンチ（５２）を併用するが、押出し過程の初期
に形成される部分は加工歪みを十分に与えることができ
ず異方性が所期の高さに達しないため、この部分も製品
にならず、ますます歩留りが下げる。 工程は、ブラン
クの装填−インナーパンチ／アウターパンチによる後方
押出し−孔あけパンチによる底部打ち抜き−カウンター
パンチによる放出からなり、全体として生産性が高いと
はいえない。This manufacturing method has a drawback in that the portion that hits the bottom of the cup must be cut off, and therefore the yield from the blank to the ring-shaped magnet is low. The outer punch (52) is also used for the extrusion, but the portion formed in the initial stage of the extrusion cannot give sufficient processing strain and the anisotropy does not reach the desired height. It does not become a product, and the yield decreases more and more. The process consists of loading blanks-backward extrusion with inner / outer punches-bottom punching with punching punches-discharging with counter punches and is not entirely productive.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、希土
類粉末焼結磁石であってラジアル異方性をもったものを
押出成形により製造する技術に伴っていた上記の欠点を
なしく、材料の歩留りが高く、かつ生産性が向上した改
良方法を提供すること、およびその方法を実施するため
の装置を提供することにある。SUMMARY OF THE INVENTION The object of the present invention is to eliminate the above-mentioned drawbacks associated with the technology for producing a rare earth powder sintered magnet having radial anisotropy by extrusion molding. It is an object of the present invention to provide an improved method with high yield and improved productivity, and an apparatus for carrying out the method.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成する本
発明の筒状の希土類磁石素材を製造する方法は、図４に
示すように、一定の断面の貫通孔をもつダイ（４）に、
孔の一方の側から出入するパンチ（６１）と、孔の他方
の側から挿入されてその先端が孔内に位置するマンドレ
ル（６２）とを設けた装置に、孔の一方の側から希土類
磁石の第一のブランク（１）を装填し、図５に示すよう
にパンチ（６１）で押圧することにより第一のブランク
を変形させてカップ状体（２）とし、続いて図６に示す
ように希土類磁石の第二のブランクを装填してパンチに
よる押圧をすることにより第一のブランクが変形して生
じたカップ状体を筒状体（３）とするとともに、第二の
ブランクをカップ状体（２）とし、さらに希土類磁石の
第三以降のブランクを次々と装填してパンチによる押圧
を繰り返すことにより、ダイの他方の側から筒状体
（３）を次々と得ることからなる。As shown in FIG. 4, a method for producing a cylindrical rare earth magnet material according to the present invention which achieves the above-mentioned object is obtained by forming a die (4) having a through hole of a constant cross section. ,
A rare earth magnet is provided from one side of the hole to a device provided with a punch (61) which goes in and out from one side of the hole and a mandrel (62) which is inserted from the other side of the hole and whose tip is located in the hole. No. 1 blank (1) is loaded, and the first blank is deformed into a cup-shaped body (2) by pressing with a punch (61) as shown in FIG. 5, and subsequently as shown in FIG. The second blank of the rare-earth magnet is loaded into and the cup-shaped body formed by deforming the first blank by pressing with the punch is formed into a tubular body (3), and the second blank is cup-shaped. The body (2) is further loaded with blanks of the third and subsequent rare earth magnets and the pressing by the punch is repeated to obtain the tubular body (3) one after another from the other side of the die.
【０００６】本発明の方法でラジアル異方性の磁気特性
をもつ磁石素材を製造する対象となる代表的な磁石ブラ
ンクは、希土類磁石のブランクとして、重量で、（２０
〜４０％）Ｎｄ−（４０〜７０％）Ｆｅ−（０〜３０
％）Ｃｏ−(０．３〜３．０％)Ｂ磁石合金の超急冷粉末
をコールドプレスおよびホットプレスにより成形した柱
状体である。A typical magnet blank for producing a magnet material having a magnetic property of radial anisotropy by the method of the present invention is a rare earth magnet blank, by weight (20
-40%) Nd- (40-70%) Fe- (0-30
%) Co- (0.3-3.0%) B magnet alloy ultra-quenched powder is molded by cold pressing and hot pressing.
【０００７】上記の方法を実施するための本発明の筒状
の希土類磁石素材を製造する装置は、図４および５に示
すように、一定の断面の貫通孔を有するダイ(４)、ダイ
の孔内に孔の一方の側から出入可能であって、ダイに装
填された希土類磁石のブランクを押圧するパンチ（６
１)、孔の他方の側から出入可能なマンドレル（６２)、
および孔の他方の側において前進後退可能であって、前
進位置においてはマンドレルをその先端がダイの孔内に
位置するように支持し、後退位置においてはマンドレル
から分離する、マンドレルのバックアップ手段（７）か
ら本質的に構成される。As shown in FIGS. 4 and 5, the apparatus for producing the cylindrical rare earth magnet material of the present invention for carrying out the above method is a die (4) having a through hole of a constant cross section, A punch (6 that can be inserted into and removed from one side of the hole and presses the blank of the rare earth magnet loaded in the die (6
1), a mandrel (62) that can be moved in and out from the other side of the hole,
And a backing means (7) for the mandrel which can be advanced and retracted on the other side of the hole, supporting the mandrel in the advanced position such that its tip is located in the hole of the die and separating it from the mandrel in the retracted position. ) Consists essentially of.
【０００８】[0008]
【作用】本発明の装置の実用的な全体構成は、図７に示
すように、図４の構成部分に加えて、希土類磁石のブラ
ンクをダイの孔の一方の側に次々と供給する手段（図示
してない）、および製造された筒状の希土類磁石の素材
を次々と運び去る移送手段（８）を付加したものであ
る。As shown in FIG. 7, the practical whole structure of the apparatus of the present invention is, in addition to the constituent parts of FIG. 4, means for supplying blanks of rare earth magnets to one side of the hole of the die one after another ( (Not shown) and a transfer means (8) for successively carrying away the material of the manufactured tubular rare earth magnet.
【０００９】この装置は、図７には示してないが、マン
ドレルを囲んでダイの孔内に孔の他方の側から出入可能
であって、一方の側からのパンチの押圧に対応して、装
填されたブランクを押圧するアウターパンチをそなえて
いてもよい。 それにより、押出し初期に形成される端
部の横割れを防止し、かつその部分の加工率を高く保つ
ことができる。Although not shown in FIG. 7, this apparatus is capable of moving in and out of the hole of the die around the mandrel from the other side of the hole, and corresponding to pressing of the punch from one side, An outer punch for pressing the loaded blank may be provided. As a result, it is possible to prevent lateral cracking of the end portion formed in the initial stage of extrusion and to keep the processing rate of that portion high.
【００１０】ブランクを供給する手段により次々とダイ
（４）上に運ばれ、図４にみるように装填された第一の
ブランク（１）は、パンチ（６１）に押圧されてマンド
レル（６２）の周囲に進み、図５にみたようにカップ状
体（２）を形成する。 第二のブランクを引続いて装填
しパンチ（６１）を押圧することにより、図６にみたよ
うに第二のブランクがカップ状体になるとともに、第一
のブランクが変形してできたカップ状体は、第二のブラ
ンクに押される結果、ダイの孔とマンドレルとの間の空
間に進み、筒状体（３）となる。The first blank (1), which is successively carried on the die (4) by the means for supplying the blanks and loaded as shown in FIG. 4, is pressed by the punch (61) and the mandrel (62). To form a cup-shaped body (2) as seen in FIG. By continuously loading the second blank and pressing the punch (61), the second blank becomes a cup-shaped body as shown in FIG. 6, and the first blank is deformed to form a cup-shaped body. The body is pushed into the second blank resulting in the space between the die hole and the mandrel, resulting in a tubular body (3).
【００１１】これを繰り返すことにより、装填されたブ
ランクはいずれも筒状体となって、次々にダイの孔の他
方の側から排出される。 マンドレルバックアップ手段
(７)は、図７に破線で示した後退位置に後退してマンド
レル（６２）と分離することにより、それに伴って筒状
体の移送手段（８）がやはり破線で示した各位置を循環
して筒状体（３）を次々と運び去り、次工程へ回すこと
を可能にする。By repeating this, each of the loaded blanks becomes a cylindrical body and is discharged one after another from the other side of the hole of the die. Mandrel backup means
(7) retreats to the retracted position shown by the broken line in FIG. 7 and separates from the mandrel (62), so that the cylindrical transfer means (8) circulates through each position also shown by the broken line. Then, the cylindrical bodies (3) can be carried away one after another and turned to the next step.
【００１２】このようにして、従来技術による場合のよ
うに、切り捨てなければならないカップ底部が生じない
から、ブランクから素材への材料歩留りが高い。 また
従来技術とちがってカップ底部の切断工程は不要であ
り、被加工材は、ダイの孔の中を一方から他方へ進むだ
けで流れは順調に進めることができるから、能率の向上
が容易である。In this way, the material yield from the blank to the material is high, since no cup bottoms have to be cut off as in the case of the prior art. Also, unlike the prior art, no cutting process is required at the bottom of the cup, and the work material can flow smoothly by simply moving from one side to the other in the hole of the die. is there.
【００１３】本発明を実施したとき、得られる筒状体
は、しばしば図８に示すような断面形状、すなわち端面
が軸に対して垂直でなく傾いたものとなる。 これは、
押出加工時に塑性変形するときの材料の流れ方に起因す
るものであって、リング磁石の製造にとってこうした現
象は好ましくない。 この点を改善するには、図９に示
す断面形状のブランク、すなわち柱状体の周縁部が中央
部に対して軸方向にずれた皿状をなす柱状体を使用し、
この皿状の持ち上った周縁が孔の外側を向くようにダイ
へ装填して実施するとよい。When the present invention is practiced, the resulting tubular body often has a cross-sectional shape as shown in FIG. 8, that is, the end faces are not perpendicular to the axis but are inclined. this is,
This phenomenon is not preferable for the manufacture of ring magnets because it is caused by the flow of material when plastically deforming during extrusion. In order to improve this point, a blank having a cross-sectional shape shown in FIG. 9, that is, a dish-shaped columnar body in which the peripheral edge of the columnar body is axially displaced from the central portion is used,
It is recommended to load the die so that the dish-shaped raised peripheral edge faces the outside of the hole.
【００１４】[0014]
【実施例】重量で、Ｎｄ：３０．５％、Ｃｏ：６．０
％、Ｂ：０．９％およびＧａ：０．６％を含有し、残部
（６２％）が実質上Ｆｅである希土類磁石合金を溶製
し、単ロール法により超急冷して薄帯としたものを、３
００μｍ以下に粉砕した。 この粉末を冷間で圧粉成形
し、さらにＡｒ雰囲気下に温度８００℃、圧力２トン／
cm2でホットプレスして、直径２４mm×高さ１３．１mm
の円柱状体とした。EXAMPLES Nd: 30.5%, Co: 6.0 by weight
%, B: 0.9% and Ga: 0.6%, and the balance (62%) of the rare earth magnet alloy was substantially Fe, and was rapidly quenched by the single roll method to obtain a ribbon. Stuff 3
It was crushed to a size of 00 μm or less. This powder is cold-compacted and further compacted in an Ar atmosphere at a temperature of 800 ° C. and a pressure of 2 tons /
Hot pressed at cm 2 , diameter 24 mm × height 13.1 mm
It was a columnar body.
【００１５】図４〜７に示した構成の装置を用いて、上
記の円柱状体を４箇、次々と押出加工して、外径２４mm
×内径１８mm×高さ３０mmの円筒状体とした。 ５箇目
の柱状体としてＣｕ製ダミーを使用し、これがカップ状
体となったところで全体をとり出した。 比較のため、
図１〜３に示す従来の装置で、上記の磁石粉末焼結体で
ある柱状体をカップ状に成形した。Using the apparatus having the construction shown in FIGS. 4 to 7, the above cylindrical bodies were extruded one after another to have an outer diameter of 24 mm.
A cylindrical body having an inner diameter of 18 mm and a height of 30 mm was prepared. A Cu dummy was used as the fifth columnar body, and when it became a cup-shaped body, the entire body was taken out. For comparison,
With the conventional apparatus shown in FIGS. 1 to 3, the columnar body, which is the magnet powder sintered body, was molded into a cup shape.
【００１６】本発明に従って得た筒状体は、１箇目の上
端面および２〜４箇目の上下端面が傾いていて、各１．
５mmほど切り捨てなければならなかった（そのため、材
料歩留りは９０％である）が、全体にわたって（ＢＨ)m
axが３０ＭＧＯｅ以上の特性を示した。 また、４箇の
筒状体と１箇のカップ状体とをとり出すまでの所要時間
は、１００秒である。The tubular body obtained according to the present invention has the first upper end surface and the second to fourth upper and lower end surfaces inclined, and
It had to be cut down by about 5 mm (so the material yield was 90%), but (BH) m
The ax exhibited a characteristic of 30 MGOe or more. The time required to take out the four cylindrical bodies and the one cup-shaped body is 100 seconds.
【００１７】従来技術によるカップ状成形品は、厚さ２
mmの底部を切捨てたほか、押出し初期に形成されたカッ
プ縁部６mmは（ＢＨ)maxが３０ＭＧＯｅの要求水準に達
していないため、切り捨てなければならなかった。 こ
れらの理由で、材料歩留りは５５％に止まった。 カッ
プ状体１箇を得るに要した時間は、３５秒である。A cup-shaped molded article according to the prior art has a thickness of 2
In addition to truncating the bottom of mm, the cup edge 6 mm formed in the initial stage of extrusion did not reach the required level of (BH) max of 30 MGOe, and thus had to be truncated. For these reasons, the material yield remained at 55%. The time required to obtain one cup-shaped body was 35 seconds.
【００１８】[0018]
【発明の効果】本発明によるときは、ラジアル異方性を
もつ希土類焼結磁石の製造を、従来より高い材料歩留り
と生産性をもって実施することができる。 これは、リ
ング磁石等の製造コストを引き下げるのに役立つ。According to the present invention, a rare earth sintered magnet having radial anisotropy can be manufactured with a higher material yield and higher productivity than ever before. This helps reduce the manufacturing cost of ring magnets and the like.
【図１】 ラジアル異方性をもった希土類粉末焼結磁石
の素材を製造する従来技術を説明する図であって、ブラ
ンクをダイに装填した段階を示す縦断面図。FIG. 1 is a view for explaining a conventional technique for producing a material for a rare earth powder sintered magnet having radial anisotropy, which is a vertical cross-sectional view showing a stage in which a blank is loaded into a die.
【図２】 図１に続いて、ブランクをパンチで押圧して
後方押出し加工を行ないカップ状体を得た段階を示す縦
断面図。FIG. 2 is a vertical cross-sectional view showing a stage following FIG. 1 in which a blank is pressed by a punch to perform a backward extrusion process to obtain a cup-shaped body.
【図３】 図２に続いて、カップ状体の底部を打ち抜い
た段階を示す縦断面図。FIG. 3 is a vertical cross-sectional view showing a stage after punching out the bottom portion of the cup-shaped body, following FIG. 2;
【図４】 本発明に従ってラジアル異方性をもった希土
類粉末焼結磁石の素材を製造する工程を説明する図であ
って、第一のブランクをダイに装填した段階を示す縦断
面図。FIG. 4 is a view for explaining a process of manufacturing a raw material for a rare earth powder sintered magnet having radial anisotropy according to the present invention, which is a vertical cross-sectional view showing a stage in which a first blank is loaded into a die.
【図５】 図４に続いて、第一のブランクをパンチで押
圧して前方押出し加工を行ないカップ状体を得た段階を
示す縦断面図。FIG. 5 is a vertical cross-sectional view showing a stage following FIG. 4 in which a first blank is pressed by a punch to perform a forward extrusion process to obtain a cup-shaped body.
【図６】 図５に続いて、第二のブランクをパンチで押
圧してこれをカップ状体にするとともに、第一のブラン
クが変形して生じたカップ状体を筒状体にした段階を示
す縦断面図。FIG. 6 shows a step of pressing the second blank with a punch to make it into a cup-shaped body, and making the cup-shaped body formed by the deformation of the first blank into a cylindrical body, following FIG. FIG.
【図７】 本発明の装置の全体構造を示す、主要部の縦
断面図。FIG. 7 is a vertical cross-sectional view of the main part, showing the overall structure of the device of the present invention.
【図８】 本発明の方法で得られる筒状体に起りがち
な、傾いた端面を示す縦断面図。FIG. 8 is a vertical cross-sectional view showing an inclined end surface that tends to occur in a tubular body obtained by the method of the present invention.
【図９】 図８に示したような、筒状体の端面の傾きが
少ない、好ましいブランク形状を示す縦断面図。FIG. 9 is a vertical cross-sectional view showing a preferable blank shape in which the end face of the tubular body has a small inclination as shown in FIG.
１ ブランク ２ カップ状体 ３ 筒状体 ４ ダイ ５１ インナーパンチ ５２ アウターパンチ ５３ 孔あけパンチ ６１ パンチ ６２ マンドレル ６３
アウターパンチ ７ マンドレルバックアップ手段 ８ 移送手段1 Blank 2 Cup-shaped body 3 Cylindrical body 4 Die 51 Inner punch 52 Outer punch 53 Hole punching punch 61 Punch 62 Mandrel 63
Outer punch 7 Mandrel backup means 8 Transfer means
Claims (7)
一方の側から出入するパンチと、孔の他方の側から挿入
されてその先端が孔内に位置するマンドレルとを設けた
装置に、孔の一方の側から希土類磁石の第一のブランク
を装填し、パンチで押圧することにより第一のブランク
を変形させてカップ状体とし、続いて希土類磁石の第二
のブランクを装填してパンチによる押圧をすることによ
り第一のブランクが変形して生じたカップ状体を筒状体
とするとともに、第二のブランクをカップ状体とし、さ
らに希土類磁石の第三以降のブランクを次々と装填して
パンチによる押圧を繰り返すことにより、ダイの他方の
側から筒状体を次々と得ることからなる筒状の希土類磁
石素材を製造する方法。1. An apparatus having a die having a through hole of a constant cross section, provided with a punch that comes in and out from one side of the hole, and a mandrel that is inserted from the other side of the hole and has its tip located in the hole. , The first blank of the rare earth magnet is loaded from one side of the hole, the first blank is deformed into a cup by pressing with a punch, and then the second blank of the rare earth magnet is loaded. The cup-shaped body formed by deforming the first blank by pressing with a punch is formed into a cylindrical body, the second blank is formed into a cup-shaped body, and the third and subsequent blanks of the rare earth magnet are successively formed. A method for manufacturing a tubular rare earth magnet material, which comprises successively obtaining a tubular body from the other side of the die by repeatedly loading and loading with a punch.
の側から出入可能なアウターパンチをそなえた装置を使
用し、一方の側からのパンチによる押圧に対応して他方
の側からのアウターパンチによる押圧をも行なう請求項
１の方法。2. An apparatus comprising an outer punch which surrounds a mandrel and is capable of moving in and out from the other side in a hole of a die, and which corresponds to pressing by the punch from one side, the outer side from the other side. The method according to claim 1, wherein pressing with a punch is also performed.
(２０〜４０％)Ｎｄ−（４０〜７０％）Ｆｅ−（０〜３
０％）Ｃｏ−（０．３〜３．０％）Ｂ磁石合金の超急冷
粉末をコールドプレスおよびホットプレスにより成形し
た柱状体を使用する請求項１の方法。3. A blank of a rare earth magnet, by weight,
(20-40%) Nd- (40-70%) Fe- (0-3
The method according to claim 1, wherein a columnar body formed by cold pressing and hot pressing a super-quenched powder of 0%) Co- (0.3 to 3.0%) B magnet alloy is used.
周縁部が中央部に対して軸方向にずれた皿状をなす柱状
体を使用し、この皿状の持ち上った周縁が孔の外側を向
くようにダイへ装填して実施する請求項１の方法。4. As a blank of a rare earth magnet, a columnar body having a dish shape in which a peripheral edge portion of the columnar body is axially displaced from a central portion is used, and the dished peripheral edge portion is located outside the hole. 2. The method of claim 1, wherein the method is carried out by loading the die so as to face.
の孔内に孔の一方の側から出入可能であって、ダイに装
填された希土類磁石のブランクを押圧するパンチ、孔の
他方の側から出入可能なマンドレル、および孔の他方の
側において前進後退可能であって、前進位置においては
マンドレルをその先端がダイの孔内に位置するように支
持し、後退位置においてはマンドレルから分離する、マ
ンドレルのバックアップ手段から本質的に構成される筒
状の希土類磁石素材を製造する装置。5. A die having a through hole of a constant cross section, a punch capable of entering and leaving from one side of the hole into the hole of the die and pressing a blank of rare earth magnet loaded in the die, the other of the holes. A mandrel that can be moved in and out from the side, and can be advanced and retracted on the other side of the hole, and in the advanced position, supports the mandrel so that its tip is located in the hole of the die, and separates from the mandrel in the retracted position , An apparatus for producing a cylindrical rare earth magnet material essentially consisting of a backup means for a mandrel.
の側に次々と供給する手段、および製造された筒状の希
土類磁石の素材を次々と運び去る手段を付加した請求項
５の装置。6. The apparatus according to claim 5, further comprising means for supplying blanks of the rare earth magnet to one side of the hole of the die one after another, and means for carrying away the material of the manufactured cylindrical rare earth magnet one after another.
方の側から出入可能であって、一方の側からのパンチの
押圧に対応して、装填されたブランクを押圧するアウタ
ーパンチをそなえた請求項５の装置。7. An outer punch, which surrounds the mandrel and can be inserted into and removed from the other side of the hole in the die, and presses the loaded blank in response to the pressing of the punch from one side. The device of claim 5, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7280861A JPH09129463A (en) | 1995-10-27 | 1995-10-27 | Manufacturing method and device of rare earth cylindrical magnet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7280861A JPH09129463A (en) | 1995-10-27 | 1995-10-27 | Manufacturing method and device of rare earth cylindrical magnet material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09129463A true JPH09129463A (en) | 1997-05-16 |
Family
ID=17630996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7280861A Pending JPH09129463A (en) | 1995-10-27 | 1995-10-27 | Manufacturing method and device of rare earth cylindrical magnet material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09129463A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006073741A (en) * | 2004-09-01 | 2006-03-16 | Daido Steel Co Ltd | Manufacturing method for ring-shaped magnet raw material and production device used for its manufacturing method |
| US7325434B2 (en) | 2004-09-01 | 2008-02-05 | Daido Tokushuko Kabushiki Kaisha | Method for manufacturing ring-shaped magnet material and manufacturing apparatus used therefor |
| US7730755B2 (en) | 2006-09-06 | 2010-06-08 | Daido Tokushuko Kabushiki Kaisha | Process of producing permanent magnet and permanent magnet |
| EP2244271A1 (en) * | 2007-12-28 | 2010-10-27 | Intermetallics Co., Ltd. | Sintered magnet manufacturing apparatus |
| JP2010258151A (en) * | 2009-04-23 | 2010-11-11 | Hitachi Metals Ltd | Method for producing r-tm-b radial anisotropic ring magnet |
| CN105047396A (en) * | 2015-08-14 | 2015-11-11 | 杭州史宾纳机械设备有限公司 | Double-cylinder pressing mechanism for one-stage molding of neodymium iron boron anisotropy multi-pole magnetic ring |
-
1995
- 1995-10-27 JP JP7280861A patent/JPH09129463A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006073741A (en) * | 2004-09-01 | 2006-03-16 | Daido Steel Co Ltd | Manufacturing method for ring-shaped magnet raw material and production device used for its manufacturing method |
| US7325434B2 (en) | 2004-09-01 | 2008-02-05 | Daido Tokushuko Kabushiki Kaisha | Method for manufacturing ring-shaped magnet material and manufacturing apparatus used therefor |
| JP4561974B2 (en) * | 2004-09-01 | 2010-10-13 | 大同特殊鋼株式会社 | Manufacturing method of ring magnet material |
| US7730755B2 (en) | 2006-09-06 | 2010-06-08 | Daido Tokushuko Kabushiki Kaisha | Process of producing permanent magnet and permanent magnet |
| EP2244271A1 (en) * | 2007-12-28 | 2010-10-27 | Intermetallics Co., Ltd. | Sintered magnet manufacturing apparatus |
| EP2244271A4 (en) * | 2007-12-28 | 2011-04-13 | Intermetallics Co Ltd | Sintered magnet manufacturing apparatus |
| US8657593B2 (en) | 2007-12-28 | 2014-02-25 | Intermetallics Co., Ltd. | Sintered magnet production system |
| JP2010258151A (en) * | 2009-04-23 | 2010-11-11 | Hitachi Metals Ltd | Method for producing r-tm-b radial anisotropic ring magnet |
| CN105047396A (en) * | 2015-08-14 | 2015-11-11 | 杭州史宾纳机械设备有限公司 | Double-cylinder pressing mechanism for one-stage molding of neodymium iron boron anisotropy multi-pole magnetic ring |
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