JPH0344346Y2 - - Google Patents
Info
- Publication number
- JPH0344346Y2 JPH0344346Y2 JP12038686U JP12038686U JPH0344346Y2 JP H0344346 Y2 JPH0344346 Y2 JP H0344346Y2 JP 12038686 U JP12038686 U JP 12038686U JP 12038686 U JP12038686 U JP 12038686U JP H0344346 Y2 JPH0344346 Y2 JP H0344346Y2
- Authority
- JP
- Japan
- Prior art keywords
- inner diameter
- punch
- outer diameter
- punched
- 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.)
- Expired
Links
- 238000004080 punching Methods 0.000 claims description 33
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 6
- 230000000750 progressive effect Effects 0.000 claims description 4
- 239000002699 waste material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 235000012489 doughnuts Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Punching Or Piercing (AREA)
- Manufacture Of Motors, Generators (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、回転電機の積層鉄心を製造する順送
り工程中で、内径と外径を同一工程で打抜く金型
装置に係り、特に打抜かれた内径カスを内径抜き
ダイ内から下型外へ排出させるようにした積層鉄
心製造用金型装置に関するものである。[Detailed description of the invention] (Field of industrial application) The present invention relates to a mold device that punches the inner diameter and outer diameter in the same process during the progressive process of manufacturing the laminated core of rotating electric machines, and in particular, The present invention relates to a mold device for manufacturing a laminated iron core that discharges the inside diameter waste from inside the inside diameter punching die to the outside of the lower die.
（従来の技術）
従来のこの種の積層鉄心製造用金型装置では、
例えば特開昭51−40505号や特開昭59−175357号
および特開昭59−175358号の各公報に開示されて
いるように、鉄心の内外径を同一工程で打抜き加
工することによつて同軸度精度を向上させ、これ
により製品の性能向上を計る提案がなされてい
る。(Prior art) In the conventional mold equipment for manufacturing laminated cores of this type,
For example, as disclosed in JP-A-51-40505, JP-A-59-175357, and JP-A-59-175358, the inner and outer diameters of the iron core are punched in the same process. Proposals have been made to improve coaxiality accuracy and thereby improve product performance.
（考案が解決しようとする問題点）
しかしながら、前記した公報における金型装置
では、内径の打抜きによつて打抜き材から分離さ
れた内径カスを上型側へ押出す構成であるため
に、当該内径カスを上型側から外部へ排出させる
装置の構造が複数化すると共に、高価なものであ
つた。そこで本考案では、上記した問題点を解決
しうる積層鉄心製造用金型装置の提供を目的とす
るものである。(Problem to be solved by the invention) However, the mold device in the above-mentioned publication is configured to extrude the inner diameter scraps separated from the punched material by punching the inner diameter toward the upper die side. The structure of the device for discharging the waste from the upper mold side to the outside is multiplied and is expensive. Therefore, the object of the present invention is to provide a mold apparatus for manufacturing a laminated iron core that can solve the above-mentioned problems.
（問題点を解決するための手段）
本考案の要旨は、積層鉄心製造用の順送り工程
中で、打抜き材に対して内径と外径を同一工程で
打ち抜く金型装置において、上型に装着された外
径抜きパンチ内には、内径抜きパンチが同心状に
組み込まれ、下型に装着された外径抜きダイ内に
は、内径抜きダイが同心状に組み込まれ、前記外
径抜きパンチは、内径抜きパンチが内径抜きダイ
と嵌合して鉄心の内径抜きされた後に外径抜きダ
イと嵌合して鉄心の外径抜きされるように、内径
抜きパンチとの間に段差が設けられ、また前記内
径抜きダイは、内径打抜き力に対抗できる押上力
を有し且つ外径抜きパンチの押圧力によつて下降
可能なように下端部がバネ支弾され、前記外径抜
きされた鉄心を、打抜き材に保持させる保持手段
を有すると共に、前記内径抜きダイ内には打抜か
れた内径カスを落下させて下型外へ排出させる通
路が設けられている積層鉄心製造用金型装置であ
る。(Means for Solving Problems) The gist of the present invention is that, in a die device that punches the inner diameter and outer diameter of a punched material in the same process during the progressive feeding process for manufacturing a laminated core, An inner diameter punch is concentrically built into the outer diameter punch, and an inner diameter punch is concentrically built into the outer diameter punch which is attached to the lower mold. A step is provided between the inner diameter punch and the inner diameter punch so that the inner diameter punch is fitted with the inner diameter punch die to punch out the inner diameter of the iron core, and then fitted with the outer diameter punch die to punch the outer diameter of the iron core. Further, the inner diameter punching die has a pushing force capable of resisting the inner diameter punching force, and has a lower end supported by a spring so that it can be lowered by the pressing force of the outer diameter punch, and the core of the outer diameter punched iron core. This mold device for manufacturing a laminated iron core has a holding means for holding the punched material, and a passage is provided in the inner diameter punching die to allow the punched inner diameter waste to fall and be discharged to the outside of the lower die.
（実施例）
以下に本考案の一実施例を図面に基づいて説明
する。第３図はステータコアの打抜き工程図を示
し、帯状の金属薄板による打抜き材１０１に対し
て、第１工程では打抜き材１０１を順送り金型に
沿つて案内するパイロツト孔１０２の打抜きがな
され、次いで第２工程ではスロツト１０３の打抜
き、第３工程では内径１０４と外径１０５をほぼ
同時に打抜き、分離された内径カス１０６を排出
すると共に、ドーナツ状の鉄心１０７を外径１０
５の抜穴１０８内に一担プツシユバツクさせ、第
４工程では抜穴１０８から鉄心１０７を抜き落し
て、既に抜き落された鉄心に積層状態でカシメ付
けされる。(Example) An example of the present invention will be described below based on the drawings. FIG. 3 shows a diagram of the punching process of the stator core. In the first step, a pilot hole 102 is punched out for guiding the punched material 101 along a progressive die in a punched material 101 made of a strip-shaped thin metal plate. In the second step, the slot 103 is punched out, and in the third step, the inner diameter 104 and outer diameter 105 are punched out almost simultaneously, the separated inner diameter waste 106 is discharged, and the donut-shaped iron core 107 is punched out with an outer diameter of 10.
In the fourth step, the iron core 107 is pulled out from the hole 108 and is laminated and caulked onto the already pulled out core.
本考案の金型装置は、前記第３工程に使用され
るものであつて、その構成を第１図に示す。尚、
図面の右半分は金型装置のパンチおよびダイの構
成を理解しやすい個所で破断した要部縦断面図、
左半分は金型装置のパンチおよびダイの取付状態
を理解しやすい個所で破断した右半分とは別の縦
断面図である。上型ホルダー１には、シートプレ
ート６とパツト５を介して外径抜きパンチ３およ
び内径抜きパンチ４が取付けられて上型Ｐが構成
されている。内径抜きパンチ４は、外径抜きパン
チ３内に同心状に取付けられると共に、当該内径
抜きパンチと外径抜きパンチに段差ｔを設け、打
抜きに際して最初に内径抜きが行なわれた後に外
径抜きが行なわれるように、内径抜きパンチ４の
方が僅かに突設されている。また、外径抜きパン
チ３と内径抜きパンチ４の間には、後述するよう
に内径打抜き時に打抜き材１０１の押えを行うと
共に、内径抜きパンチ４に喰い付いた鉄心１０７
を取り払うストツパーとして機能するノツクアウ
トリング８が装着されている。該ノツクアウトリ
ング８はノツクアウト用スプリング１０に押圧さ
れたノツクアウトピン９によつてバネ支弾され、
このバネ力は上型ホルダー１に螺合された栓ネジ
１１によつて調整可能である、尚、符号７は前記
ノツクアウトリング８と協働して打抜き材１０１
を保持するストリツパープレートである。 The mold device of the present invention is used in the third step, and its configuration is shown in FIG. 1. still,
The right half of the drawing is a longitudinal cross-sectional view of the main parts broken at a point where it is easy to understand the structure of the punch and die of the molding device.
The left half is a longitudinal cross-sectional view different from the right half, with a cutaway taken at a location where it is easy to understand how the punch and die are attached to the mold device. An outer diameter punch 3 and an inner diameter punch 4 are attached to the upper mold holder 1 via a seat plate 6 and a pad 5 to form an upper mold P. The inner diameter punch 4 is installed concentrically inside the outer diameter punch 3, and a step t is provided between the inner diameter punch and the outer diameter punch, so that the inner diameter is punched first and then the outer diameter is punched. In order to do this, the inner diameter punch 4 is slightly protruded. In addition, between the outer diameter punch 3 and the inner diameter punch 4, the punched material 101 is held down during inner diameter punching, and the iron core 107 bited into the inner diameter punch 4 is placed between the outer diameter punch 3 and the inner diameter punch 4.
A knockout ring 8 is attached that functions as a stopper to remove the. The knockout ring 8 is spring supported by a knockout pin 9 pressed by a knockout spring 10.
This spring force can be adjusted by a stopper screw 11 screwed into the upper die holder 1. Reference numeral 7 indicates a function of the punching material 101 in cooperation with the knockout ring 8.
It is a stripper plate that holds.
一方、下型ホルダー１２には打抜き材１０１が
載設される刃物台１５が設けられ、該刃物台１５
内には外径抜きダイ１３が内蔵されていると共
に、当該外径抜きダイ１３の内側には内径抜きダ
イ１４が同心状に装着されて下型Ｄが構成されて
いる。 On the other hand, the lower mold holder 12 is provided with a tool rest 15 on which the punched material 101 is placed.
An outer diameter punching die 13 is built inside, and an inner diameter punching die 14 is mounted concentrically inside the outer diameter punching die 13 to form a lower die D.
内径抜きダイ１４は中空体で、その内側にはパ
イプ１６が螺着され、内径抜きによつて打抜き材
１０１から分離された内径カス１０６を落下させ
て下型Ｄの外部へ排出するための通路Ｒが形成さ
れている。また、内径抜きダイ１４は外径抜きダ
イ１３に対して摺動可能に嵌合されていると共
に、該内径抜きダイ１４の下面と皿バネ押えプレ
ート１９間には皿ばね１８が収容され、当該皿バ
ネ１８によつて内径抜きダイ１４は内径打抜き力
に対抗できる押上力を有し且つ外径抜きパンチの
押圧力によつて下降可能である。尚、符号１７は
内径抜きダイ１４からパイプ１６へ螺合させてパ
イプの回り止めを行う止めネジ、符号２０は皿バ
ネ押えプレート１９を下型ホルダー２に止着させ
る六角穴付きボルトである。 The inner diameter punching die 14 is a hollow body, and a pipe 16 is screwed inside thereof, and is a passage for dropping the inner diameter waste 106 separated from the punched material 101 by the inner diameter punching and discharging it to the outside of the lower die D. R is formed. Further, the inner diameter punching die 14 is slidably fitted into the outer diameter punching die 13, and a disc spring 18 is housed between the lower surface of the inside diameter punching die 14 and the disc spring pressing plate 19. Due to the disk spring 18, the inner diameter punching die 14 has an upward force capable of opposing the inner diameter punching force, and can be lowered by the pressing force of the outer diameter punch. In addition, the reference numeral 17 is a set screw screwed into the pipe 16 from the inner diameter punching die 14 to prevent the pipe from rotating, and the reference numeral 20 is a hexagon socket bolt for fixing the disc spring pressing plate 19 to the lower mold holder 2.
次に、前記構成による金型装置の動作を第２図
によつて説明する。 Next, the operation of the mold apparatus having the above configuration will be explained with reference to FIG.
図示しないプレスラムの下降によつて上型Ｐが
下降すると、第２図ａで示すようにまずストリツ
パープレート７が次いでノツクアウトリング８が
打抜き材１０１を押し下げ、該打抜き材１０１が
外径抜きダイ１３および刃物台１５上に載設した
状態で保持される。その後に、前記パツト５に取
付けられたシートプレート６によつて一端が支持
された内径抜きパンチ４と内径抜きダイ１４と
が、第２図ｂで示すように噛み合つて両者が協働
して内径１０４を下型Ｄ側へ打抜き、打抜き材１
０１から分離された内径カス１０６は内径抜きダ
イ１４の内筒部およびパイプ１６によつて形成さ
れた通路Ｒ内に落下し、該通路Ｒから下型Ｄの外
部へ排出される。次いで、下降してきた外径抜き
パンチ３によつて第２図ｃで示すように、打抜き
材１０１を下方から支えている内径抜きダイ１４
が押圧され、皿バネ１８が圧縮して内径抜きダイ
１４は内径抜きパンチ４と噛み合つた状態で押し
下げられるので、外径抜きダイ１３と外径抜きパ
ンチ３も噛み合つて両者は協働して外径１０５を
下型Ｄ側へ打抜く。そして、打抜かれた鉄心１０
７はドーナツ状に形成され、内外周を各々内径抜
きパンチ４と外径抜きダイ１３に挾持されると共
に、上下を外径抜きパンチ３と内径抜きダイ１４
に挾持された状態でプレスの下死点に到る。 When the upper mold P is lowered by the lowering of the press ram (not shown), as shown in FIG. It is held mounted on the die 13 and the turret 15. After that, the inner diameter punch 4, whose one end is supported by the seat plate 6 attached to the part 5, and the inner diameter punch die 14 are engaged with each other and work together as shown in FIG. 2b. Punch the inner diameter 104 to the lower mold D side, punching material 1
The inner diameter waste 106 separated from the inner diameter cutting die 14 falls into the passage R formed by the inner cylinder part of the inner diameter punching die 14 and the pipe 16, and is discharged from the passage R to the outside of the lower die D. Next, as shown in FIG. 2c, the descending outer diameter punch 3 cuts the inner diameter punch die 14 supporting the punched material 101 from below.
is pressed, the disc spring 18 is compressed, and the inner diameter punching die 14 is pushed down while being engaged with the inner diameter punch 4, so the outer diameter punching die 13 and the outer diameter punching punch 3 are also engaged, and the two work together. and punch out the outer diameter 105 toward the lower mold D side. And the punched iron core 10
7 is formed into a donut shape, and its inner and outer circumferences are held between an inner diameter punch 4 and an outer diameter punch die 13, respectively, and the upper and lower parts are sandwiched between an outer diameter punch 3 and an inner diameter punch die 14.
The press reaches the bottom dead center while being held between the two.
下死点を通過するとプレスラムは上昇し、これ
にともなつてまず外径抜きパンチ３が上昇して鉄
心１０７から離れると押圧力から解放された内径
抜きダイ１４も皿バネ１８の弾発力で上昇して鉄
心１０７を上型Ｐ側へ押し上げ、鉄心１０７を外
径抜きダイ１３から抜き出させると共に、上面を
ノツクアウトリング８で押圧されている鉄心１０
７は続く内径抜きパンチ４の上昇によつて当該内
径抜きパンチ４からも抜き出される。 After passing the bottom dead center, the press ram rises, and along with this, the outer diameter punch 3 first rises and separates from the iron core 107, and the inner diameter punch die 14, which is released from the pressing force, also moves due to the elastic force of the disc spring 18. The iron core 107 is lifted up and pushed up toward the upper mold P side, and the iron core 107 is pulled out from the outer diameter punching die 13, and the iron core 10 whose upper surface is pressed by the knockout ring 8
7 is also extracted from the inner diameter punch 4 as the inner diameter punch 4 continues to rise.
そして、この抜き出された鉄心１０７は第２図
ｄで示すように、内径抜きダイ１４の上昇とノツ
クアウトリング８およびストリツパープレート７
による上面の支持によつて再び打抜き材１０１の
抜き穴１０８内にプツシユバツクされ、前記した
第４工程に打抜き材１０１と共に順送りされる。
尚、上記した実施例では外径１０５を完全に打抜
き状態にしてプツシユバツクさせたが、鉄心１０
７は前記段差ｔを調節して外径１０５が打抜き材
１０１とつながつた半打抜き状態となるようにす
るか若しくは外径の一部が打抜き材１０１とつな
がるように外径抜きパンチの外周に打抜き不可部
分を設けるようにし、その後の第４工程又は中間
に一工程を設けて完全に打抜きを行うようにして
も良い。 Then, as shown in FIG.
By supporting the upper surface thereof, the punched material is pushed back into the punched hole 108 of the punched material 101, and then sent together with the punched material 101 to the fourth step described above.
In the above-mentioned embodiment, the outer diameter 105 was completely punched out and pushed back, but the iron core 105
7 adjusts the step t so that the outer diameter 105 is connected to the punched material 101 in a half-punched state, or punches the outer periphery of the outer diameter punch so that a part of the outer diameter is connected to the punched material 101. It is also possible to provide an impossible part and then provide a fourth step or one intermediate step to completely punch out.
又、実施例ではステータコアを打抜くための金
型に付いて例示したが、要旨の範囲内でローター
コアやその他の回転電機の積層鉄心の製造に適用
できることはもちろんである。 Further, in the embodiment, a mold for punching a stator core is illustrated, but it goes without saying that the present invention can be applied to manufacturing a rotor core or a laminated core for other rotating electric machines within the scope of the gist.
（考案の効果）
前記した実施例では明らかなとおり、本考案で
は内径を同一工程で打抜いて寸法精度を向上させ
ると共に、打抜いた鉄心の歪み無くすることによ
つて製品の性能を向上させることが出来る金型装
置が得られ、しかも内径抜きカスを下型側へ落下
させて下型外へ排出させることによつて、その排
出機構を極めて簡単にすることができる。(Effects of the invention) As is clear from the examples described above, the invention improves dimensional accuracy by punching the inner diameter in the same process, and also improves the performance of the product by eliminating distortion of the punched core. In addition, by allowing the inner diameter punched waste to fall to the lower mold side and discharge it out of the lower mold, the discharge mechanism can be extremely simplified.
図面はいずれも本考案の実施例を示し、第１図
は金型装置の要部縦断面図、第２図は同装置の動
作説明図、第３図は打抜き工程図である。
符号の説明、３……外径抜きパンチ、４……内
径抜きパンチ、１３……外径抜きダイ、１４……
内径抜きダイ、１８……バネ（皿バネ）、１０１
……打抜き材、１０４……内径、１０５……外
径、１０６……内径カス、１０７……鉄心、１０
８……抜き穴、Ｄ……下型、Ｐ……上型、Ｒ……
通路、ｔ……段差。
The drawings all show embodiments of the present invention; FIG. 1 is a vertical sectional view of the main part of the mold device, FIG. 2 is an explanatory diagram of the operation of the device, and FIG. 3 is a diagram of the punching process. Explanation of symbols, 3... Outer diameter punch, 4... Inner diameter punch, 13... Outer diameter punch die, 14...
Inner diameter cutting die, 18... Spring (disc spring), 101
...Punching material, 104...Inner diameter, 105...Outer diameter, 106...Inner diameter waste, 107...Iron core, 10
8...Drill hole, D...Lower die, P...Upper die, R...
Passage, t...step.
Claims (1)
に対して内外径を同一工程で打ち抜く金型装置
において、上型に装着された外径抜きパンチ内
には、内径抜きパンチが同心状に組み込まれ、
下型に装着された外径抜きダイ内には、内径抜
きダイが同心状に組み込まれ、前記外径抜きパ
ンチは、内径抜きパンチが内径抜きダイと嵌合
して鉄心の内径抜きされた後に外径抜ダイと嵌
合して鉄心の外径抜きされるように、内径抜き
パンチとの間に段差が設けられ、また前記内径
抜きダイは、内径打抜き力に対抗できる押上力
を有し且つ外径抜きパンチの押圧力によつて下
降可能なように下端部がバネ支弾され、前記外
径抜きされた鉄心を、打抜き材に保持させる保
持手段を有すると共に、前記内径抜きダイ内に
は打抜かれた内径カスを落下させて下型外へ排
出させる通路が設けられていることを特徴とし
た積層鉄心製造用金型装置。 (2) 前記鉄心の保持手段は、一担外径抜きパンチ
によつて打抜かれた鉄心を、上型上昇時に外径
ダイによつて打抜き材の抜き穴内へ戻すように
したプツシユバツク手段である請求の範囲第(1)
項記載の積層鉄心製造用金型装置。 (3) 前記鉄心の保持手段は、外径を半抜き状態に
するように外径抜きパンチと内径抜きパンチと
の段差を調節せしめたことである請求の範囲第
(1)項記載の積層鉄心製造用金型装置。 (4) 前記鉄心の保持手段は、打抜かれた鉄心外径
の一部が打抜き材と連結されるように、外径抜
きパンチの外周に外径抜き不可部分を設けたこ
とである請求の範囲第(1)項記載の積層鉄心製造
用金型装置。[Scope of Claim for Utility Model Registration] (1) In a die device that punches the inner and outer diameters of a punched material in the same process during the progressive process for manufacturing a laminated core, the outer diameter punch attached to the upper mold The inner diameter punch is incorporated concentrically,
An inner diameter punching die is installed concentrically within the outer diameter punching die attached to the lower mold, and the outer diameter punch is used to punch the inner diameter of the iron core after the inner diameter punch is fitted with the inner diameter punching die. A step is provided between the inner diameter punch and the inner diameter punch so that the outer diameter of the core can be punched out by fitting with the outer diameter punch die, and the inner diameter punch has a pushing force capable of resisting the inner diameter punching force. The lower end is supported by a spring so that it can be lowered by the pressing force of the outer diameter punch, and has a holding means for holding the core with the outer diameter punched in the punched material, and has a holding means in the inner diameter punch die. A mold device for manufacturing a laminated iron core, characterized in that a passageway is provided for allowing punched inner diameter scraps to fall and be discharged to the outside of the lower mold. (2) The core holding means is a push-back means that returns the core punched by a one-step outer diameter punch into the punched hole of the punched material by an outer diameter die when the upper die is raised. Range of (1)
A mold device for manufacturing a laminated iron core as described in . (3) The holding means for the iron core adjusts the level difference between the outer diameter punch and the inner diameter punch so that the outer diameter is half punched.
A mold device for manufacturing a laminated core as described in (1). (4) Claims in which the core holding means is provided with a portion on the outer periphery of the outer diameter punch that cannot be punched so that a part of the outer diameter of the punched core is connected to the punched material. A mold device for manufacturing a laminated iron core as described in paragraph (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12038686U JPH0344346Y2 (en) | 1986-08-07 | 1986-08-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12038686U JPH0344346Y2 (en) | 1986-08-07 | 1986-08-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6329625U JPS6329625U (en) | 1988-02-26 |
| JPH0344346Y2 true JPH0344346Y2 (en) | 1991-09-18 |
Family
ID=31008653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12038686U Expired JPH0344346Y2 (en) | 1986-08-07 | 1986-08-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0344346Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998037993A1 (en) * | 1997-02-25 | 1998-09-03 | Institute Of Technology Precision Electrical Discharge Work's | Member having different shapes, and layer-built body manufacturing method and apparatus |
| US11065665B2 (en) | 2014-12-18 | 2021-07-20 | Kuroda Precision Industries Ltd | Progressive die machine and method for manufacturing laminated iron cores by using same |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0388860U (en) * | 1989-12-27 | 1991-09-11 | ||
| JPH0475734U (en) * | 1990-11-16 | 1992-07-02 | ||
| JPH11192518A (en) * | 1998-01-08 | 1999-07-21 | Nissan Motor Co Ltd | Method for sequentially punching method and device therefor |
| JP4985901B2 (en) * | 2001-08-24 | 2012-07-25 | トヨタ自動車株式会社 | Rotating laminator |
-
1986
- 1986-08-07 JP JP12038686U patent/JPH0344346Y2/ja not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998037993A1 (en) * | 1997-02-25 | 1998-09-03 | Institute Of Technology Precision Electrical Discharge Work's | Member having different shapes, and layer-built body manufacturing method and apparatus |
| US11065665B2 (en) | 2014-12-18 | 2021-07-20 | Kuroda Precision Industries Ltd | Progressive die machine and method for manufacturing laminated iron cores by using same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6329625U (en) | 1988-02-26 |
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