JPH10277652A - Manufacture of cylindrical body having double-folded flange - Google Patents
Manufacture of cylindrical body having double-folded flangeInfo
- Publication number
- JPH10277652A JPH10277652A JP8396097A JP8396097A JPH10277652A JP H10277652 A JPH10277652 A JP H10277652A JP 8396097 A JP8396097 A JP 8396097A JP 8396097 A JP8396097 A JP 8396097A JP H10277652 A JPH10277652 A JP H10277652A
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical body
- double
- cylindrical
- flange
- punch
- 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.)
- Granted
Links
Landscapes
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光ディスクや磁気
ディスクを回転駆動するモータに用いられているロータ
フレーム等の二重折曲鍔付き円筒体を製造する方法およ
びロータフレームに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a cylindrical body with a double-bend flange such as a rotor frame used for a motor for rotatingly driving an optical disk or a magnetic disk, and a rotor frame.
【０００２】[0002]
【従来の技術】光ディスクや磁気ディスクを回転駆動す
るモータのロータフレーム７１は、図１３に示すよう
に、ディスク７６を調芯するボス部７４を中心に備えデ
ィスク面７６ａを面受けするターンテーブル部７２と、
リング状のロータマグネット７７を収容するマグネット
フレーム７３とからなる。このモータを用いた機器の小
型、軽量化に伴い、ロータマグネット７７とマグネット
フレーム７３とは小型化されてきたが、ターンテーブル
部７２の直径はディスク７６の姿勢を安定して保持する
ためある程度の大きさが必要で、マグネットフレーム７
３の直径よりも大きくなっている。このため、従来はボ
ス部７４を突設したターンテーブル部７２とマグネット
フレーム７３とを別々に成形したものを接合部７５にて
カシメやスポット溶接等で接合してロータフレーム７１
を得ていた。2. Description of the Related Art As shown in FIG. 13, a rotor frame 71 of a motor for rotatingly driving an optical disk or a magnetic disk has a boss 74 for centering a disk 76 and a turntable portion for receiving a disk surface 76a. 72,
And a magnet frame 73 that houses a ring-shaped rotor magnet 77. The rotor magnet 77 and the magnet frame 73 have been miniaturized with the miniaturization and weight reduction of equipment using this motor. However, the diameter of the turntable 72 has a certain size in order to stably hold the posture of the disk 76. The size is necessary, and the magnet frame 7
3 is larger than the diameter. For this reason, the rotor frame 71 is conventionally formed by separately forming a turntable portion 72 having a boss portion 74 projecting therefrom and a magnet frame 73 by caulking or spot welding at a joining portion 75.
Was getting.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来のように２部品７２、７３をカシメやスポット溶接等
で接合する方法では、部品コストおよび製造コスト、接
合部７５の精度や信頼性の点で問題があった。コストや
信頼性ならびに生産性の観点から板状素材からの一体プ
レス成形による方法が望まれている。However, in the method of joining the two parts 72 and 73 by caulking or spot welding as in the above-mentioned conventional technique, the parts cost, the manufacturing cost, and the accuracy and reliability of the joint portion 75 are reduced. There was a problem. From the viewpoints of cost, reliability and productivity, a method by integral press molding from a plate material is desired.
【０００４】そこで、二重折曲鍔付き円筒体を一体成形
する方法として例えば、図１０に示すように、一枚の板
状素材から図示しない幾つかのプレス成形工程を経て得
られたワークを、環状の薄肉突起部６１ａを有する下パ
ンチ６１とこれに対向する上パンチ６２とで挟んで、ダ
イ６３の中をガイドして上下からプレス成形し、図１１
に示すような、頂面部６６の周縁に上側に張出し折曲げ
られ二重になった張出部６７が形成されたワーク６５を
得、次いで図示しないが、この張出部６７の上面に上向
きに拡がった円錐面を押付けて周囲に押拡げ、次いでこ
の周囲に押拡げられた張出部を上下から圧潰して、図１
２に示すような、周囲に張出し折曲げられて二重に重ね
られた鍔部６８を形成する方法が考えられる。Therefore, as a method for integrally molding a double-bent flanged cylindrical body, for example, as shown in FIG. 10, a work obtained from a single plate-like material through several press-forming steps (not shown) is used. A lower punch 61 having an annular thin projection 61a and an upper punch 62 opposed to the lower punch 61 are guided into a die 63 and press-formed from above and below.
As shown in FIG. 5, a work 65 is formed in which a double overhang 67 is formed on the periphery of the top surface 66 so as to extend upward and bend. Then, although not shown, an upper surface of the overhang 67 faces upward. The expanded conical surface is pressed and expanded to the periphery, and then the overhang portion expanded to the periphery is crushed from above and below.
As shown in FIG. 2, a method of forming a flange portion 68 that is overhanged and bent around and double overlapped can be considered.
【０００５】しかし前記の製造方法では、図１０に示す
プレス成形工程において、張出部６７を成形する下パン
チ６１の薄肉突起部６１ａが破損し易く、安定した生産
が困難であるという問題がある。However, in the above-mentioned manufacturing method, there is a problem that the thin projection 61a of the lower punch 61 for forming the overhang 67 is easily damaged in the press molding step shown in FIG. .
【０００６】本発明は、上記問題に鑑み、二重折曲鍔付
き円筒体を一体成形で精度よく低コストでしかも安定し
て生産することができる二重折曲鍔付き円筒体の製造方
法を提供することを目的とする。SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a method of manufacturing a double-bend flanged cylinder that can be produced stably at a low cost with high precision by integrally molding a double-bend flanged cylinder. The purpose is to provide.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記目的を達
成するため、薄肉の有頂円筒体の頂面部の周縁に、周囲
に張出し折曲げられて二重に重ねられた鍔部をプレス成
形にて形成する二重折曲鍔付き円筒体の製造方法であっ
て、前記有頂円筒体の円筒部の下半部をその内外面側か
ら挟持しかつ下端面を当接面に当接し、前記頂面部をそ
の上下から挟持しながら前記下半部側に相対的に移動さ
せて、前記円筒部の上半部を上方周囲に張出させて、上
方周囲に張出し折曲げられ二重になった張出部を形成す
る第１工程と、この張出部をその上面に上向きに拡がっ
た円錐面を押付けて周囲に押拡げる第２工程と、この周
囲に押拡げられた張出部を上下から圧潰して、周囲に張
出し折曲げられて二重に重ねられた鍔部を形成する第３
工程とからなることを特徴とする。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method of forming a double-walled flange which is overhanged and bent around the periphery of the top surface of a thin-walled cylindrical body. A method for manufacturing a double-bent flanged cylindrical body formed by molding, wherein a lower half portion of a cylindrical portion of the topped cylindrical body is sandwiched from inner and outer surfaces thereof and a lower end surface thereof is brought into contact with a contact surface. Moving the upper half portion of the cylindrical portion upwardly around the upper half thereof while holding the top surface portion from above and below the upper half portion, and bending the upper half portion of the cylindrical portion upwardly. A first step of forming an overhang portion, a second step of pressing the overhanging conical surface on the upper surface thereof to expand the overhang, and a second step of expanding the overhang portion. Crushing from above and below, forming a double-overlapping flange that is stretched out and bent around
And a process.
【０００８】本発明の二重折曲鍔付き円筒体の製造方法
によれば、有頂円筒体の頂面部を円筒部の下半部側に押
し込むとき、有頂円筒体の円筒部の上半部のみが周囲に
開放されており他の部分が束縛されているため、この円
筒部の上半部が、上下の圧縮力に屈して周囲へ膨らみ、
その内側に押し込まれてくる頂面部と上パンチとによっ
て周囲に押出され、上方周囲の空間に張出し折曲げられ
るので、環状の薄肉突起部を有する下パンチ等を用いる
ことなく、上方周囲に張出し折曲げられ二重になった張
出部をプレス成形にて安定して形成できる。それ以降
は、この張出部を、円筒部の下半部を基準として、その
上面に上向きに拡がった円錐面を押付けてこの円錐面に
沿うように周囲に押拡げ、この周囲に押拡げられた張出
部を上下から圧潰して、周囲に張出し折曲げられて二重
に重ねられた鍔部を形成することができるので、二重折
曲鍔付き円筒体を一体成形で精度よく得ることができ
る。According to the method of manufacturing a cylindrical body with a double-folded flange of the present invention, when the top surface of the capped cylinder is pushed into the lower half of the cylinder, the upper half of the capped cylinder is pressed. Because only the part is open to the surroundings and the other parts are bound, the upper half of this cylindrical part swells to the surroundings by bending up and down compressive force,
It is extruded around by the top surface and the upper punch that are pushed into the inside, and is extended and folded into the space around the upper part, so that it is extended and folded upward without using a lower punch having an annular thin projection. The bent double overhang can be formed stably by press molding. After that, with the lower half of the cylindrical part as a reference, this overhang is pressed against the upper surface of the conical surface, and is expanded around the conical surface, and is expanded around the conical surface. The overhanging part can be crushed from above and below to form a double-overlapping flange part that is overhanged and bent around. Can be.
【０００９】また、本発明の二重折曲鍔付き円筒体の製
造方法によれば、ロータマグネットを収容する円筒部
と、円筒部の上端に形成されディスクを調芯する部材を
保持するボス部を中心に備えた頂面部と、頂面部の周縁
に周囲に張出し折曲げられて二重に重ねられるように形
成されディスクを面受けする鍔部とを備えたロータフレ
ームを一体成形で精度よく低コストでしかも安定して生
産することができる。Further, according to the method of manufacturing a cylindrical body with a double-folded flange of the present invention, a cylindrical portion for accommodating a rotor magnet and a boss portion formed at an upper end of the cylindrical portion and holding a member for aligning a disk. The rotor frame, which has a top surface centered at the center and a flange portion formed so as to be extended and bent around the periphery of the top surface portion so as to be double overlapped, and which receives a disk, is integrally molded with a low precision and low accuracy. It can be produced stably at low cost.
【００１０】[0010]
【発明の実施の形態】本発明の実施形態を図面に基づい
て以下に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.
【００１１】本発明の二重折曲鍔付き円筒体の製造方法
の一実施形態は、光ディスクを回転駆動するモータのロ
ータフレームの製造方法に関するもので、図１に示すよ
うな薄肉の有頂円筒体１の頂面部２の周縁２ａに、図８
に示すような周囲に張出し折曲げられて二重に重ねられ
た鍔部８を、複数のプレス成形工程によって順次プレス
成形して形成する二重折曲鍔付き円筒体の製造方法であ
る。One embodiment of the method for manufacturing a cylindrical body with a double-folded flange according to the present invention relates to a method for manufacturing a rotor frame of a motor for rotating and driving an optical disk. The peripheral edge 2a of the top surface 2 of the body 1
This is a method for manufacturing a double-bend flanged cylindrical body which is formed by sequentially press-forming a plurality of double-overlapping flange portions 8 which are extended and bent around as shown in FIG.
【００１２】有頂円筒体１は、図１に示すように、ボス
部３を中心に備えた頂面部２と、下半部４ｂの内側に図
示しないリング状のロータマグネットを収容する円筒部
４とからなる。この有頂円筒体１は、既知の方法によっ
て一枚板素材から成形されたもので、ボス部３には、後
工程のモータ組立時にディスク調芯用の調芯リングを装
着するための角孔３ａ等が予め設けられている。As shown in FIG. 1, the toped cylindrical body 1 has a top surface portion 2 having a boss 3 as a center, and a cylindrical portion 4 which accommodates a ring-shaped rotor magnet (not shown) inside a lower half portion 4b. Consists of This topped cylindrical body 1 is formed from a single-plate material by a known method. The boss portion 3 has a square hole for mounting an alignment ring for aligning a disk at the time of motor assembly in a later process. 3a and the like are provided in advance.
【００１３】二重折曲鍔付き円筒体７は、図８に示すよ
うに、前記ボス部３を中心に備えた頂面部２と、その周
囲に張出し折曲げられて二重に重ねられディスク面を面
受けする鍔部８とからなるターンテーブル部９と、リン
グ状のロータマグネットを収容するマグネットフレーム
１０とが一体成形されたものである。そして、この二重
折曲鍔付き円筒体７に、後工程にてそのボス部３の中心
に軸受け装着用孔３ｂ等を貫設して、図９に示すような
ロータフレーム２０が得られる。As shown in FIG. 8, the cylindrical body 7 with a double-folded flange is provided with a top surface 2 having the boss 3 as a center, and a double-layered disk surface which is extended and bent around the top surface. And a turntable portion 9 comprising a flange portion 8 for receiving a ring, and a magnet frame 10 for accommodating a ring-shaped rotor magnet. Then, a bearing mounting hole 3b or the like is provided in the center of the boss portion 3 in the cylindrical body 7 with the double-folded flange in a later step to obtain a rotor frame 20 as shown in FIG.
【００１４】この二重折曲鍔付き円筒体７の製造方法
は、（１）有頂円筒体１の円筒部４の上半部４ａを上方
周囲に張出させて、上方周囲に張出し折曲げられ二重に
なった張出部１１を形成する第１工程（図１〜図４参
照）と、（２）この張出部１１を周囲に押拡げる第２工
程（図５、図６参照）と、（３）この周囲に押拡げられ
た張出部１２を上下から圧潰して、周囲に張出し折曲げ
られて二重に重ねられた鍔部８を形成する第３工程（図
７、図８参照）との３工程からなる。The method of manufacturing the double-bend flanged cylindrical body 7 is as follows: (1) The upper half 4a of the cylindrical portion 4 of the top-end cylindrical body 1 is extended upward and bent upward. A first step (see FIGS. 1 to 4) for forming a double overhang 11, and (2) a second step (see FIGS. 5 and 6) for spreading the overhang 11 around. And (3) a third step of crushing the overhanging portion 12 expanded around the periphery from above and below to form a double overlapped flange portion 8 overhanging and bending around the periphery (FIGS. 7 and 7). 8)).
【００１５】以下に、本発明の二重折曲鍔付き円筒体の
製造方法の一実施形態の各工程に用いられるプレス金型
と、そのプレス金型によるプレス成形の手順とを、図面
に基づいて説明する。Hereinafter, a press die used in each step of one embodiment of the method for manufacturing a double-bend flanged cylindrical body of the present invention, and a press molding procedure using the press die will be described with reference to the drawings. Will be explained.
【００１６】（第１工程）第１工程の金型は、図２、図
３に示すように、第１下金型２１と、第１下金型２１に
対向して上下動する第１上金型２２とからなる。(First Step) As shown in FIGS. 2 and 3, the mold in the first step includes a first lower mold 21 and a first upper mold which moves up and down opposite to the first lower mold 21. And a mold 22.
【００１７】第１下金型２１は、上面２３ａで有頂円筒
体１の頂面部２の下面を受けかつ外周面２３ｂで有頂円
筒体１の円筒部４の内面を受ける第１下パンチ２３と、
上面２５ａで有頂円筒体１の円筒部４の下端面４ｃを受
けかつ第１下パンチ２３を軸方向上下動自在に保持し上
位置制限する下パンチホルダ２５と、第１下パンチ２３
を上方に押し付ける下スプリング２７と、下スプリング
２７を収容し第１下パンチ２３を下位置制限する下バッ
キングプレート２８と、有頂円筒体１の円筒部４の下半
部４ｂの外周面に外周から当接する第１ダイ２６とを備
えている。The first lower die 21 receives a lower surface of the top surface portion 2 of the topped cylindrical body 1 on the upper surface 23a and a first lower punch 23 which receives the inner surface of the cylindrical portion 4 of the topped cylindrical body 1 on the outer peripheral surface 23b. When,
A lower punch holder 25 for receiving the lower end surface 4c of the cylindrical portion 4 of the cylindrical body 1 on the upper surface 25a and holding the first lower punch 23 movably in the axial direction to limit the upper position;
, A lower backing plate 28 that accommodates the lower spring 27 and limits the lower position of the first lower punch 23, and an outer peripheral surface of the lower half 4 b of the cylindrical portion 4 of the topped cylindrical body 1. And a first die 26 that comes into contact with the first die 26.
【００１８】第１上金型２２は、有頂円筒体１の頂面部
２の上面を上方から押し込む第１上パンチ２４と、第１
上パンチ２４を軸方向上下動自在に保持し下位置制限す
る第１上パンチホルダ２９と、第１上パンチ２４を下方
に押し付ける上スプリング３０と、上スプリング３０を
収容し第１上パンチ２４を上位置制限する上バッキング
プレート３１とを備えている。The first upper mold 22 includes a first upper punch 24 for pushing the upper surface of the top surface 2 of the topped cylindrical body 1 from above, and a first upper punch 24.
A first upper punch holder 29 that holds the upper punch 24 so as to be movable vertically in the axial direction and limits the lower position, an upper spring 30 that presses the first upper punch 24 downward, and a first upper punch 24 that accommodates the upper spring 30 And an upper backing plate 31 for limiting the upper position.
【００１９】第１ダイ２６は、周方向に４分割されてお
り、縮径位置において各内面２６ａが接続された円筒面
を構成し、かつ上面２６ｂが接続された平面を構成し、
それぞれの分割体が半径方向に図示しない駆動手段によ
って進退動し、拡径位置において内側に有頂円筒体１の
円筒部４の下半部４ｂを導入し、縮径位置においてその
下半部４ｂを周囲から押え付けるようになっている。The first die 26 is divided into four parts in the circumferential direction, forms a cylindrical surface to which each inner surface 26a is connected at the reduced diameter position, and forms a plane to which the upper surface 26b is connected.
Each divided body moves forward and backward in the radial direction by a driving means (not shown), and introduces the lower half 4b of the cylindrical portion 4 of the toped cylindrical body 1 inside at the enlarged diameter position and the lower half 4b at the reduced diameter position. Is pressed from the surroundings.
【００２０】第１上パンチ２４は、下端面２４ａが、有
頂円筒体１の頂面部２の直径より小さな外径と頂面部２
のボス部３の直径より少し大きな内径とを持ったリング
面状となっており、外周面２４ｂが上向きに少し拡がっ
た円錐面となっていて、この円錐面の頂角Ａは６０°程
度である。The first upper punch 24 has a lower end surface 24a having an outer diameter smaller than the diameter of the top surface portion 2 of the topped cylindrical body 1 and the top surface portion 2a.
Is formed in a ring surface having an inner diameter slightly larger than the diameter of the boss portion 3, and the outer peripheral surface 24b is a conical surface slightly expanding upward, and the apex angle A of the conical surface is about 60 °. is there.
【００２１】次に第１工程のプレス成形の手順を説明す
る。Next, the procedure of press forming in the first step will be described.
【００２２】先ず、図２に示すように、有頂円筒体１を
第１下パンチ２３に被せるようにセットし、第１ダイ２
６を縮径位置にして、有頂円筒体１の円筒部４の下端面
４ｃを下パンチホルダ２５の上面２５ａに当接させた状
態で、円筒部４の下半部４ｂの内外面を挟持させて固定
する。First, as shown in FIG. 2, the toped cylindrical body 1 is set so as to cover the first lower punch 23, and the first die 2 is set.
With the lower end surface 4c of the cylindrical portion 4 of the topped cylindrical body 1 in contact with the upper surface 25a of the lower punch holder 25, the inner and outer surfaces of the lower half portion 4b of the cylindrical portion 4 are held while the diameter 6 is in the reduced diameter position. And fix it.
【００２３】第１上金型２２を下降させていくと、図２
に示すように、先ず第１上パンチ２４の下端面２４ａが
有頂円筒体１の頂面部２の上面に当接して、頂面部２の
上面に第１上パンチ２４の荷重が印加され、その反動で
第１上パンチ２４が下制限位置から相対的に持ち上げら
れ、次いで第１上パンチ２４が上制限位置まで相対的に
持ち上げられて上バッキングプレート３１に接触する
と、図３に示すように、第１上パンチ２４が上バッキン
グプレート３１と共に強制的に押し下げられ、頂面部２
を下スプリング２７による挟持力で挟持したまま頂面部
２を下方に押し下げる。このとき有頂円筒体１の円筒部
４の内面、円筒部４の下半部４ｂの外周面および円筒部
４の下端面４ｃが束縛されており、かつ円筒部４の上半
部４ａの外周面が周囲に開放されているため、この円筒
部４の上半部４ａが、上からの圧縮力に屈して周囲へ膨
らみ、その内側に上方から押し込まれてくる頂面部２と
第１上パンチ２４の外周面２４ｂとによって周囲に押出
され、上方周囲の空間に張出し折曲げられる。こうし
て、図４に示すように、図１０に示すような環状の薄肉
突起部６１ａを有する下パンチ６１等を用いることな
く、頂面部１３の周縁１３ａに、上方周囲に張出し折曲
げられ二重になった張出部１１が形成されたワーク５が
得られる。As the first upper mold 22 is lowered, FIG.
As shown in (1), first, the lower end surface 24a of the first upper punch 24 comes into contact with the upper surface of the top surface portion 2 of the capped cylindrical body 1, and the load of the first upper punch 24 is applied to the upper surface of the top surface portion 2. As shown in FIG. 3, when the first upper punch 24 is relatively lifted from the lower limit position by the reaction and then relatively lifted to the upper limit position and comes into contact with the upper backing plate 31, as shown in FIG. The first upper punch 24 is forcibly pushed down together with the upper backing plate 31, and the top surface 2
Is pressed down by the lower spring 27 while the top surface 2 is held down. At this time, the inner surface of the cylindrical portion 4 of the capped cylindrical body 1, the outer peripheral surface of the lower half 4 b of the cylindrical portion 4 and the lower end surface 4 c of the cylindrical portion 4 are bound, and the outer periphery of the upper half 4 a of the cylindrical portion 4. Since the surface is open to the periphery, the upper half portion 4a of the cylindrical portion 4 swells to the periphery by being compressed by the compressive force from above, and the top surface portion 2 and the first upper punch which are pushed into the inside from above. The outer peripheral surface 24b is pushed out to the periphery by the outer peripheral surface 24b, and is extended and bent into an upper peripheral space. In this way, as shown in FIG. 4, without using the lower punch 61 or the like having the annular thin projection 61 a as shown in FIG. The work 5 on which the overhang portion 11 is formed is obtained.
【００２４】（第２工程）第２工程の金型は、図５に示
すように、第２下金型３５と、第２下金型３５に対向し
て上下動する第２上金型３６とからなる。(Second Step) As shown in FIG. 5, the mold in the second step includes a second lower mold 35 and a second upper mold 36 which moves up and down opposite to the second lower mold 35. Consists of
【００２５】第２下金型３５は、上面３７ａでワーク５
の頂面部２の下面を受けかつ外周面３７ｂでワーク５の
円筒部１０の内面を受ける第２下パンチ３７と、第２下
パンチ３７を収容する下パンチホルダ３９と、第２下パ
ンチ３７を固定する下バッキングプレート４０と、ワー
ク５の円筒部１０の外周面に外周から当接しかつ上面４
１ｂでワーク５の張出部１１の下面を受ける第２ダイ４
１とを備えている。The second lower mold 35 holds the workpiece 5 on the upper surface 37a.
The second lower punch 37 that receives the lower surface of the top surface 2 of the second lower punch and receives the inner surface of the cylindrical portion 10 of the work 5 at the outer peripheral surface 37b, the lower punch holder 39 that houses the second lower punch 37, and the second lower punch 37 The lower backing plate 40 to be fixed is in contact with the outer peripheral surface of the cylindrical portion 10 of the work 5 from the outer periphery.
A second die 4 for receiving the lower surface of the overhang 11 of the workpiece 5 at 1b
1 is provided.
【００２６】第２上金型３６は、ワーク５の頂面部２の
上面を上方から押え付ける第４パンチ４２と、第４上パ
ンチ４２を内嵌してワーク５の張出部１１の上面を上方
から押え付ける第２上パンチ３８と、第４上パンチ４２
を軸方向上下動自在に保持し下位置制限しかつ第２上パ
ンチ３８を支持する上バッキングプレート４３と、第４
上パンチ４２を下方に押し付けるスプリング４４と、ス
プリング４４を収容するスプリングホルダ４５とを備え
ている。The second upper mold 36 holds the upper surface of the top surface 2 of the work 5 from above by means of a fourth punch 42 and the fourth upper punch 42 to fit the upper surface of the overhang 11 of the work 5. A second upper punch 38 for pressing from above and a fourth upper punch 42
An upper backing plate 43 which holds the upper punch 38 in such a manner that the upper backing plate 43
A spring 44 for pressing the upper punch 42 downward is provided, and a spring holder 45 for accommodating the spring 44 is provided.
【００２７】第２ダイ４１は、周方向に４分割されてお
り、縮径位置において各内面４１ａが接続された円筒面
を構成し、かつ上面４１ｂが上に拡がり接続された頂角
１２０°程度円錐面を構成し、それぞれの分割体が半径
方向に図示しない駆動手段によって進退動し、拡径位置
において内側にワーク５の円筒部１０を導入し、縮径位
置においてその円筒部１０を周囲から押え付け、張出部
１１を上面４１ｂの円錐面に受けるようになっている。
第２上パンチ３８は、その下面３８ａが上に拡がった円
錐面となっており、その頂角は第２ダイ４１の上面４１
ｂの円錐面の頂角と同程度である。The second die 41 is divided into four parts in the circumferential direction, forms a cylindrical surface to which each inner surface 41a is connected at the reduced diameter position, and has an apex angle of about 120 ° in which the upper surface 41b is expanded and connected. A conical surface is formed, and each divided body is moved forward and backward by a driving means (not shown) in the radial direction, and the cylindrical portion 10 of the work 5 is introduced inside at the enlarged position, and the cylindrical portion 10 is moved from the periphery at the reduced position. The pressing and projecting portion 11 is received by the conical surface of the upper surface 41b.
The second upper punch 38 has a conical surface whose lower surface 38 a is expanded upward, and the apex angle thereof is set to the upper surface 41 of the second die 41.
It is about the same as the vertex angle of the conical surface of b.
【００２８】次に第２工程のプレス成形の手順を説明す
る。Next, the procedure of press molding in the second step will be described.
【００２９】先ず、図５に示すように、ワーク５を第２
下パンチ３７に被せるようにセットし、ワーク５の頂面
部２の下面が第２下パンチ３７の上面に当接している状
態で、第２ダイ４１を縮径位置にして、ワーク５の円筒
部１０の内外面を挟持させて固定する。First, as shown in FIG.
The second die 41 is set so as to cover the lower punch 37, and the lower surface of the top surface 2 of the work 5 is in contact with the upper surface of the second lower punch 37. The inner and outer surfaces of 10 are pinched and fixed.
【００３０】第２上金型３６を下降させていくと、先ず
第４上パンチ４２の下端面がワーク５の頂面部２の上面
に当接して、第４上パンチ４２が相対的に持ち上げら
れ、頂面部２に第４上パンチ４２の荷重と上スプリング
４４のバネ力とが印加されて頂面部２が保持される。次
いで第２上パンチ３８が上バッキングプレート４３と共
に押し下げられ、この第２上パンチ３８の下面３８ａの
円錐面がワーク５の張出部１１を上方から押え付ける
と、この張出部１１は第２上パンチ３８の下面３８ａの
円錐面に沿うように周囲に押拡げられる、これによっ
て、図６に示すように、更に周囲に押拡げられた張出部
１２が形成されたワーク６が得られる。When the second upper die 36 is lowered, first, the lower end surface of the fourth upper punch 42 comes into contact with the upper surface of the top surface 2 of the work 5 and the fourth upper punch 42 is relatively lifted. The top surface 2 is held by applying the load of the fourth upper punch 42 and the spring force of the upper spring 44 to the top surface 2. Next, the second upper punch 38 is pushed down together with the upper backing plate 43, and when the conical surface of the lower surface 38a of the second upper punch 38 presses the projecting portion 11 of the work 5 from above, the projecting portion 11 The work 6 is expanded so as to extend along the conical surface of the lower surface 38a of the upper punch 38. As a result, as shown in FIG.
【００３１】（第３工程）第３工程の金型は、図７に示
すように、第３下金型５０と、第３下金型５０に対向し
て上下動する第３上金型５１とからなる。(Third Step) As shown in FIG. 7, the mold in the third step includes a third lower mold 50 and a third upper mold 51 which moves up and down opposite to the third lower mold 50. Consists of
【００３２】第３下金型５０は、上面５２ａでワーク６
の頂面部２の下面を受けかつ外周面５２ｂでワーク６の
円筒部１０の内面を受ける第３下パンチ５２と、第３下
パンチ５２を収容する下パンチホルダ５４と、第３下パ
ンチ５２を固定する下バッキングプレート５５と、ワー
ク６の円筒部１０の外周面に外周から当接しかつ上面５
６ｂでワーク６の張出部１２の下面を受ける第３ダイ５
６とを備えている。The third lower mold 50 holds the workpiece 6 on the upper surface 52a.
A third lower punch 52 that receives the lower surface of the top surface 2 and the inner surface of the cylindrical portion 10 of the work 6 at the outer peripheral surface 52b, a lower punch holder 54 that houses the third lower punch 52, and a third lower punch 52. The lower backing plate 55 to be fixed is in contact with the outer peripheral surface of the cylindrical portion 10 of the work 6 from the outer periphery.
The third die 5 for receiving the lower surface of the overhang portion 12 of the work 6 at 6b
6 is provided.
【００３３】第３上金型５１は、ワーク６の頂面部２の
上面を上方から押え付ける第５上パンチ５７と、第５上
パンチ５７を内嵌してワーク６の張出部１２の上面を上
方から押え付ける第３上パンチ５３と、第５上パンチ５
７を軸方向上下動自在に保持し下位置制限しかつ第３上
パンチ５３を支持する上バッキングプレート５８と、第
５上パンチ５７を下方に押し付けるスプリング５９と、
スプリング５９を収容するスプリングホルダ６０とを備
えている。The third upper mold 51 includes a fifth upper punch 57 for pressing the upper surface of the top surface 2 of the work 6 from above, and an upper surface of the projecting portion 12 of the work 6 by fitting the fifth upper punch 57 therein. A third upper punch 53 for pressing the upper punch from above and a fifth upper punch 5
An upper backing plate 58 that holds the upper part 7 so as to be able to move up and down in the axial direction, limits the lower position, and supports the third upper punch 53; a spring 59 that presses the fifth upper punch 57 downward;
And a spring holder 60 for accommodating the spring 59.
【００３４】第３ダイ５６は、周方向に４分割されてお
り、縮径位置において各内面５６ａが接続された円筒面
を構成し、かつ上面５６ｂが接続された平面を構成し、
それぞれの分割体が半径方向に図示しない駆動手段によ
って進退動し、拡径位置において内側にワーク６の円筒
部１０を導入し、縮径位置においてその円筒部１０を周
囲から押え付け、張出部１２を上面５６ｂの平面に受け
るようになっている。The third die 56 is divided into four parts in the circumferential direction, forms a cylindrical surface to which each inner surface 56a is connected at the reduced diameter position, and forms a plane to which the upper surface 56b is connected.
Each of the divided bodies moves forward and backward in the radial direction by driving means (not shown), introduces the cylindrical portion 10 of the work 6 inside at the enlarged diameter position, presses the cylindrical portion 10 from the periphery at the reduced diameter position, and projects the extended portion. 12 is received on the plane of the upper surface 56b.
【００３５】第３上パンチ５３の下面５３ａは平面とな
っている。The lower surface 53a of the third upper punch 53 is flat.
【００３６】次に第３工程のプレス成形の手順を説明す
る。Next, the procedure of press molding in the third step will be described.
【００３７】先ず、図７に示すように、ワーク６を第３
下パンチ５２に被せるようにセットし、ワーク６の頂面
部２の下面が第３下パンチ５２の上面に当接している状
態で、第３ダイ５６を縮径位置にして、ワーク６の円筒
部１０の内外面を挟持させて固定する。First, as shown in FIG.
The third die 56 is set so as to cover the lower punch 52, and the lower surface of the top surface 2 of the work 6 is in contact with the upper surface of the third lower punch 52. The inner and outer surfaces of 10 are pinched and fixed.
【００３８】第３上金型５１を下降させていくと、先ず
第５上パンチ５７の下端面がワーク６の頂面部２の上面
に当接して、第５上パンチ５７が相対的に持ち上げら
れ、頂面部２に第５上パンチ５７の荷重と上スプリング
５９のバネ力とが印加されて頂面部２が保持される。次
いで第３上パンチ５３が上バッキングプレート５８と共
に押し下げられ、この第３上パンチ５３の下面５３ａが
ワーク６の張出部１２を上方から押え付けると、この張
出部１２は第３上パンチ５３の下面５３ａと第３ダイ５
６の上面５６ｂとの間で圧潰され、厚みがその部分の肉
厚のほぼ２倍で上下に水平面を有する鍔部８が形成され
る。以上によって、図８に示すように、周囲に張出し折
曲げられて二重に重ねられた鍔部８が形成された二重折
曲鍔付き円筒体７が得られる。When the third upper mold 51 is lowered, first, the lower end surface of the fifth upper punch 57 comes into contact with the upper surface of the top surface 2 of the work 6, and the fifth upper punch 57 is relatively lifted. The top surface 2 is held by applying the load of the fifth upper punch 57 and the spring force of the upper spring 59 to the top surface 2. Next, the third upper punch 53 is pushed down together with the upper backing plate 58, and when the lower surface 53 a of the third upper punch 53 presses the projecting portion 12 of the work 6 from above, the projecting portion 12 becomes the third upper punch 53. Lower surface 53a and third die 5
6 is crushed between the upper surface 56b and the upper surface 56b, and the flange portion 8 having a thickness approximately twice the thickness of the portion and having a horizontal plane at the top and bottom is formed. As described above, as shown in FIG. 8, a double-flanged flanged cylindrical body 7 having a flange portion 8 that is extended and bent around and formed to be doubled is obtained.
【００３９】上記実施形態では、モータのロータフレー
ムの製造方法に関して述べたが、本発明はこれに限定さ
れず、二重折曲鍔付き円筒体を一体成形で得る製造方法
に適用できる。また、二重折曲鍔付き円筒体の頂面部を
上方として述べたが、各工程における成形前後の円筒体
およびこれに対応するプレス金型等の上下の配置が逆で
もよい。In the above embodiment, the method of manufacturing the rotor frame of the motor has been described. However, the present invention is not limited to this, and can be applied to a manufacturing method of integrally forming a double-bend flanged cylindrical body. Further, although the top surface of the cylindrical body with a double-bent flange is described as being upward, the vertical arrangement of the cylindrical body before and after molding and the corresponding press mold in each step may be reversed.
【００４０】[0040]
【発明の効果】本発明の二重折曲鍔付き円筒体の製造方
法によれば、環状の薄肉突起部を有する下パンチ等を用
いることなく、上方周囲に張出し折曲げられ二重になっ
た張出部をプレス成形にて安定して形成できる。それ以
降は、この張出部を周囲に押拡げ、この周囲に押拡げら
れた張出部を上下から圧潰して、周囲に張出し折曲げら
れて二重に重ねられた鍔部を形成することができるの
で、二重折曲鍔付き円筒体を一体成形で精度よく得るこ
とができる。従って、ロータマグネットを収容する円筒
部と、円筒部の上端に形成されディスクを調芯する部材
を保持するボス部を中心に備えた頂面部と、頂面部の周
縁に周囲に形成されディスクを面受けする鍔部とを備え
たロータフレーム等の二重折曲鍔付き円筒体を一体成形
で精度よく低コストでしかも安定して生産することがで
きる。According to the method of manufacturing a cylindrical body with a double-bend flange according to the present invention, the cylindrical body is bent and extended to the upper periphery without using a lower punch or the like having an annular thin projection. The overhang can be formed stably by press molding. After that, expand this overhang to the periphery, crush the overhang over this area from above and below to form a double-overlapping flange that is overhanged and bent around Therefore, a cylindrical body with a double-folded flange can be obtained with high precision by integral molding. Therefore, a cylindrical portion for accommodating the rotor magnet, a top surface formed mainly at the upper end of the cylindrical portion and having a boss portion for holding a member for aligning the disk, and a disk formed around the periphery of the top surface to face the disk A cylindrical body with a double-bent flange, such as a rotor frame having a flange portion for receiving the same, can be stably produced at low cost with high precision by integral molding.
【図１】有頂円筒体の一例を示す図で、（ａ）は平面図
を、（ｂ）は正面断面図をそれぞれ示す。1A and 1B are diagrams showing an example of a topped cylindrical body, wherein FIG. 1A is a plan view and FIG. 1B is a front sectional view.
【図２】本発明の二重折曲鍔付き円筒体の製造方法の一
実施形態の第１工程のプレス成形前を示す概略断面図。FIG. 2 is a schematic cross-sectional view showing a state before a press forming in a first step of the embodiment of the method for manufacturing a cylindrical body with a double-folded flange according to the present invention.
【図３】本発明の二重折曲鍔付き円筒体の製造方法の一
実施形態の第１工程のプレス成形後を示す概略断面図。FIG. 3 is a schematic cross-sectional view showing a state after a press forming in a first step of the embodiment of the method for manufacturing a cylindrical body with a double-folded flange according to the present invention.
【図４】前記の第１工程によって張出部が形成されたワ
ークを示す図で、（ａ）は平面図を、（ｂ）は正面断面
図をそれぞれ示す。FIGS. 4A and 4B are views showing a work on which an overhang is formed in the first step, wherein FIG. 4A is a plan view and FIG. 4B is a front sectional view.
【図５】本発明の二重折曲鍔付き円筒体の製造方法の一
実施形態の第２工程を示す概略断面図。FIG. 5 is a schematic cross-sectional view showing a second step of the embodiment of the method for manufacturing a cylinder with a double-folded flange of the present invention.
【図６】前記の第２工程によって張出部が周囲に押拡げ
られたワークを示す図で、（ａ）は平面図を、（ｂ）は
正面断面図をそれぞれ示す。FIGS. 6A and 6B are views showing a work in which an overhang portion has been pushed out to the periphery by the second step, wherein FIG. 6A is a plan view and FIG. 6B is a front sectional view.
【図７】本発明の二重折曲鍔付き円筒体の製造方法の一
実施形態の第３工程を示す概略断面図。FIG. 7 is a schematic cross-sectional view showing a third step of the embodiment of the method for manufacturing a double-flanged flanged cylindrical body of the present invention.
【図８】本発明によって得られた二重折曲鍔付き円筒体
の一例を示す図で、（ａ）は平面図を、（ｂ）は正面断
面図をそれぞれ示す。FIGS. 8A and 8B are views showing an example of a cylindrical body with a double-bend collar obtained by the present invention, wherein FIG. 8A is a plan view, and FIG.
【図９】前記の二重折曲鍔付き円筒体から得られたロー
タフレームの一例を示す斜視図。FIG. 9 is a perspective view showing an example of a rotor frame obtained from the cylindrical body with the double-folded flange.
【図１０】張出部の形成方法の検討例を示す概略断面
図。FIG. 10 is a schematic cross-sectional view showing a study example of a method of forming an overhang portion.
【図１１】前記の張出部の形成方法によって張出部が形
成されたワークの一例を示す正面断面図。FIG. 11 is a front sectional view showing an example of a work on which an overhang is formed by the method of forming an overhang.
【図１２】前記のワークから得られた二重折曲鍔付き円
筒体を示す正面断面図。FIG. 12 is a front sectional view showing a cylindrical body with a double bent collar obtained from the work.
【図１３】従来のロータフレームの一例を示す正面断面
図。FIG. 13 is a front sectional view showing an example of a conventional rotor frame.
１ 有頂円筒体 ２ 頂面部 ２ａ 頂面部の周縁 ４ 有頂円筒体の円筒部 ４ａ 円筒部の上半部 ４ｂ 円筒部の下半部 ４ｃ 円筒部の下端面 ８ 鍔部 １１ 上方周囲に張出し折曲げられ二重になった張出部 １２ 周囲に押拡げられた張出部 ２５ａ 下バッキングプレートの上面（当接面） ３８ａ 第２上パンチの下面（円錐面） DESCRIPTION OF SYMBOLS 1 Toped cylindrical body 2 Top surface part 2a Peripheral edge of a top surface part 4 Cylindrical part of a topped cylindrical body 4a Upper half part of a cylindrical part 4b Lower half part of a cylindrical part 4c Lower end surface of a cylindrical part 8 Flange part 11 Bent overhang 12 Double overhang 25a Upper surface of lower backing plate (contact surface) 38a Lower surface of second upper punch (conical surface)
Claims (2)
囲に張出し折曲げられて二重に重ねられた鍔部をプレス
成形にて形成する二重折曲鍔付き円筒体の製造方法であ
って、 前記有頂円筒体の円筒部の下半部をその内外面側から挟
持しかつ下端面を当接面に当接し、前記頂面部をその上
下から挟持しながら前記下半部側に相対的に移動させ
て、前記円筒部の上半部を上方周囲に張出させて、上方
周囲に張出し折曲げられ二重になった張出部を形成する
第１工程と、 この張出部をその上面に上向きに拡がった円錐面を押付
けて周囲に押拡げる第２工程と、 この周囲に押拡げられた張出部を上下から圧潰して、周
囲に張出し折曲げられて二重に重ねられた鍔部を形成す
る第３工程とからなることを特徴とする二重折曲鍔付き
円筒体の製造方法。1. Manufacture of a double-bend flanged cylinder body formed by press-forming a double-walled flange portion which is extended and bent around the periphery of the top surface of a thin-walled cylindrical body. A method, wherein a lower half of a cylindrical portion of the capped cylindrical body is sandwiched from the inner and outer surfaces thereof and a lower end surface thereof abuts against an abutting surface, and the lower half portion is sandwiched while sandwiching the top surface from above and below. A first step of moving the upper half of the cylindrical portion toward the upper periphery by relatively moving the cylindrical portion toward the upper side to form a double-extended overhang that is bent and bent over the upper periphery; A second step of pressing the conical surface, which has an upwardly expanding conical surface on the upper surface thereof, to expand the peripheral area; And a third step of forming a flange portion superposed on the cylindrical member.
ットを収容する円筒部と、円筒部の上端に形成されディ
スクを調芯する部材を保持するボス部を中心に備えた頂
面部と、頂面部の周縁に周囲に張出し折曲げられて二重
に重ねられるように形成されディスクを面受けする鍔部
とを備えたロータフレームである請求項１記載の二重折
曲鍔付き円筒体の製造方法。2. A cylindrical body having a double-folded flange and a cylindrical portion accommodating a rotor magnet, and a top surface portion formed at an upper end of the cylindrical portion and having a boss portion for holding a member for aligning a disk. 2. A cylindrical body having a double-folded flange according to claim 1, wherein the flange is formed so as to be extended and bent around the periphery of the top surface portion so as to be double-overlapped, and a flange portion for receiving a disk. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08396097A JP3652471B2 (en) | 1997-04-02 | 1997-04-02 | Manufacturing method of cylindrical body with double bent fold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08396097A JP3652471B2 (en) | 1997-04-02 | 1997-04-02 | Manufacturing method of cylindrical body with double bent fold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10277652A true JPH10277652A (en) | 1998-10-20 |
| JP3652471B2 JP3652471B2 (en) | 2005-05-25 |
Family
ID=13817140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08396097A Expired - Fee Related JP3652471B2 (en) | 1997-04-02 | 1997-04-02 | Manufacturing method of cylindrical body with double bent fold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3652471B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112139327A (en) * | 2020-09-18 | 2020-12-29 | 中国航发贵州黎阳航空动力有限公司 | Machining method and machining device for reverse structure hole |
| CN116786687A (en) * | 2023-08-28 | 2023-09-22 | 江苏南方精工股份有限公司 | External-die external-pressing burr mechanism for internal flanging thrust washer |
-
1997
- 1997-04-02 JP JP08396097A patent/JP3652471B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112139327A (en) * | 2020-09-18 | 2020-12-29 | 中国航发贵州黎阳航空动力有限公司 | Machining method and machining device for reverse structure hole |
| CN112139327B (en) * | 2020-09-18 | 2022-08-19 | 中国航发贵州黎阳航空动力有限公司 | Machining method and machining device for reverse structure hole |
| CN116786687A (en) * | 2023-08-28 | 2023-09-22 | 江苏南方精工股份有限公司 | External-die external-pressing burr mechanism for internal flanging thrust washer |
| CN116786687B (en) * | 2023-08-28 | 2023-11-14 | 江苏南方精工股份有限公司 | External-die external-pressing burr mechanism for internal flanging thrust washer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3652471B2 (en) | 2005-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2012043232A1 (en) | Method for manufacturing embossed disc-shaped member and apparatus for manufacturing embossed disc-shaped member | |
| JPH06210371A (en) | Method and tool kit for joining laminate metal sheet | |
| US6052887A (en) | Apparatus and method for joining sheet metal layers | |
| CN100594079C (en) | Methods for manufacturing flanged article | |
| JP3821851B2 (en) | In particular, a method of manufacturing a joint joint between a field pole and a magnetic pole casing of an electric machine, and an electric machine manufactured by the method | |
| JPH10277652A (en) | Manufacture of cylindrical body having double-folded flange | |
| KR101930287B1 (en) | Apparatus and method for manufacturing of mounting cover | |
| JP2000024721A (en) | Method for pressing work welded by laser beam | |
| JPS63192524A (en) | Joining apparatus for metal plate | |
| JPH03106520A (en) | Plastically joining method | |
| KR100431640B1 (en) | Apparatus and method for clinching superposed sheet materials | |
| JP2005111491A (en) | Caulking device | |
| JP2514481B2 (en) | Welding method for metal plate and method for forming projection for welding positioning | |
| JP2540236B2 (en) | Bearing press fitting caulking device | |
| JPH02160138A (en) | Forged forming method for housing for ball joint | |
| JPH03111246A (en) | Paper-like cup and method and device for forming same | |
| JP3408151B2 (en) | Apparatus for forming a metal product in which a cylindrical portion is integrally formed concentrically and a method for forming such a metal product | |
| JPH11197765A (en) | Die for joining sheet materials and joining device | |
| JPH04284928A (en) | Device for joining sheet metal member | |
| JP2569648Y2 (en) | Caulking machine | |
| JPS6334756Y2 (en) | ||
| JPH11207412A (en) | Method and device for burring | |
| JPH10300372A (en) | Planar heat pipe, and its manufacture | |
| JPH0224167B2 (en) | ||
| JP2000246375A (en) | Jointing method of metallic sheets and jointed structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Effective date: 20050118 Free format text: JAPANESE INTERMEDIATE CODE: A971007 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Effective date: 20050215 Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050223 |
|
| R150 | Certificate of patent (=grant) or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080304 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090304 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100304 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110304 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 6 Free format text: PAYMENT UNTIL: 20110304 |
|
| LAPS | Cancellation because of no payment of annual fees |