JP3281471B2 - Thickening press processing method - Google Patents
Thickening press processing methodInfo
- Publication number
- JP3281471B2 JP3281471B2 JP33069693A JP33069693A JP3281471B2 JP 3281471 B2 JP3281471 B2 JP 3281471B2 JP 33069693 A JP33069693 A JP 33069693A JP 33069693 A JP33069693 A JP 33069693A JP 3281471 B2 JP3281471 B2 JP 3281471B2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical portion
- thickening
- punch
- cup
- press
- 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 - Fee Related
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、カップ状部材の周端部
に設けられた円筒部を厚肉化するための厚肉化プレス加
工方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for increasing the thickness of a cylindrical portion provided at the peripheral end of a cup-shaped member.
【０００２】[0002]
【従来の技術】例えば、ベルト式無断変速機に使用され
るピストン（カップ状部材）では、シリンダ内周面との
摺接部位にＯリングを装着するために、この摺接部位に
対応する円筒部がカップ状本体部よりも肉厚に構成され
ている。このため、従来より、この種のカップ状部材の
円筒部を厚肉化するための方法や装置が種々提案されて
おり、座屈やヒケ等の無い良好な状態で厚肉化すること
を可能にすべく、例えば、特開昭５６−４１０２０号公
報（以下、従来例１という）や特公平５−５５２０８号
公報（以下、従来例２という）が知られている。2. Description of the Related Art For example, in a piston (cup-shaped member) used in a belt-type continuously variable transmission, a cylinder corresponding to the sliding contact portion is provided in order to mount an O-ring on the sliding contact portion with the inner peripheral surface of the cylinder. The portion is configured to be thicker than the cup-shaped main body. For this reason, conventionally, various methods and devices for increasing the thickness of the cylindrical portion of this type of cup-shaped member have been proposed, and it is possible to increase the thickness in a good state without buckling or sink marks. For example, Japanese Patent Application Laid-Open No. 56-41020 (hereinafter referred to as Conventional Example 1) and Japanese Patent Publication No. 5-55208 (hereinafter referred to as Conventional Example 2) are known.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上記の従来
例１では、折曲工程で形成された板材の内側角部に、角
部に沿って滑らかな曲面により形成される突起を備えた
押型の角部をあてがう必要がある。しかしながら、この
突起を備えた押型は、形状が相当に複雑化してしまい、
該押型の製造に多くの工程がかかるとともに、その製造
費が高騰するという不具合が生じる。By the way, in the above-mentioned conventional example 1, the pressing die having a projection formed by a smooth curved surface along the corner is formed on the inner corner of the plate formed in the bending step. Corners need to be applied. However, the shape of the stamping die provided with this projection is considerably complicated,
The production of the die requires many steps, and the production cost of the die increases.
【０００４】また、上記の従来例２では、ブランクのリ
ング状縁部を圧縮する据込みポンチの先端面が外周面よ
り内周面が後退する内テーパ状の傾斜面であるため、前
記リング状縁部の端面にこの傾斜面に対応して斜面部が
形成されてしまう。従って、厚肉化処理後に、前記傾斜
面を平坦化させるための加工工程が必要となり、製品の
コストが上がるという問題が指摘されている。Further, in the above-mentioned conventional example 2, since the leading end surface of the upsetting punch for compressing the ring-shaped edge of the blank is an inclined surface having an inner tapered shape in which the inner peripheral surface is retracted from the outer peripheral surface, the ring-shaped inclined surface is formed. A slope is formed on the end face of the edge corresponding to the slope. Therefore, it is pointed out that a processing step for flattening the inclined surface is required after the thickening process, which increases the cost of the product.
【０００５】本発明は、この種の問題を解決するための
ものであり、カップ状部材の円筒部の厚肉化を確実かつ
効率的に行うことができるとともに、加工装置の構造を
容易に簡素化することが可能な厚肉化プレス加工方法を
提供することを目的とする。The present invention has been made to solve this kind of problem, and can reliably and efficiently increase the thickness of a cylindrical portion of a cup-shaped member, and can easily simplify the structure of a processing apparatus. It is an object of the present invention to provide a thickening press working method that can be made thin.
【０００６】[0006]
【課題を解決するための手段】前記課題を解決するため
に、本発明は、カップ状部材の周端部を折り曲げて前記
カップ状部材の本体部と同軸的に設けられた円筒部に対
し、プレス加工を施して該円筒部を厚肉化するための厚
肉化プレス加工方法であって、前記円筒部の折曲部位の
外周端縁部側にダイ部材に設けられた突起部の円弧面を
係合させるとともに、前記円筒部の前記折曲部位とは反
対側の開放端部にポンチを係合させ、前記ダイ部材と前
記ポンチとを相対的に近接する方向に変位させることに
より、前記円筒部の軸方向および半径方向内方への塑性
流動を阻止しながら、該円筒部を半径方向外方にのみ厚
肉化させることを特徴とする。In order to solve the above-mentioned problems, the present invention relates to a cylindrical portion provided by bending a peripheral end portion of a cup-shaped member so as to be coaxial with a main body of the cup-shaped member. A thickening press working method for performing a press working to increase a thickness of the cylindrical portion, wherein an arc surface of a projection provided on a die member on an outer peripheral edge side of a bent portion of the cylindrical portion. To
And a punch is engaged with an open end of the cylindrical portion opposite to the bent portion, and the punch is engaged with the die member.
The Rukoto displaces the serial punch in a direction relatively close, the plastic in the axial direction and radially inwardly of the cylindrical portion
While preventing the flow, characterized by Rukoto is only thickening the cylindrical portion radially outward.
【０００７】[0007]
【作用】本発明に係る厚肉化プレス加工方法では、カッ
プ状部材の周端部を折り曲げて設けられた円筒部の開放
端部が軸方向に押圧される際、この円筒部の折曲部位の
外周端縁側が拘束されている。このため、円筒部は、軸
方向への塑性流動が阻止されて厚肉化加工が円滑に行わ
れるとともに、前記円筒部の折曲部位外周端縁側が拘束
されて該円筒部に座屈やヒケ等が発生することを確実か
つ容易に防止することができる。According to the thickening press working method of the present invention, when the open end of the cylindrical portion provided by bending the peripheral end of the cup-shaped member is pressed in the axial direction, the bent portion of the cylindrical portion is bent. Is restrained on the outer peripheral edge side. For this reason, the cylindrical portion is prevented from plastic flow in the axial direction and the thickening process is smoothly performed, and the outer peripheral edge of the bent portion of the cylindrical portion is restrained so that the cylindrical portion buckles or sinks. Can be reliably and easily prevented from occurring.
【０００８】[0008]
【実施例】本発明に係る厚肉化プレス加工方法について
これを実施するための装置との関連で実施例を挙げ、添
付の図面を参照しながら以下詳細に説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a press working method according to an embodiment of the present invention;
【０００９】図１において、参照数字１０は、本実施例
に係る厚肉化プレス加工方法を実施するためのプレス成
形装置を示す。このプレス成形装置１０により厚肉化プ
レス加工が施されるワークＷは、カップ状部材であり、
図２に示すように、所定の肉厚を有する本体部Ｈと周端
部を折り曲げて前記本体部Ｈと同軸的に設けられた円筒
部Ｓとから一体的に構成されており、この円筒部Ｓが厚
肉化される。円筒部Ｓの折曲部位の外周端部Ｓ1 と開放
端部Ｓ2 の間には、後加工によってＯリングを装着する
ための周溝Ｆが形成される。In FIG. 1, reference numeral 10 denotes a press forming apparatus for performing a thickening press working method according to this embodiment. The work W to be subjected to the thickening press working by the press forming apparatus 10 is a cup-shaped member,
As shown in FIG. 2, the main body H is formed integrally with a main body H having a predetermined thickness and a cylindrical portion S whose peripheral end is bent to be provided coaxially with the main body H. S is thickened. Between the outer peripheral end portion of the bent portion of the cylindrical portion S S 1 and the open end S 2, the circumferential groove F for mounting the O-ring by post-processing is formed.
【００１０】図１に示すように、プレス成形装置１０
は、下部シュー１２と上部シュー１４とを備え、この下
部シュー１２とこの上部シュー１４がガイドポスト１６
およびブシュ１８に案内されて相対的に進退自在に構成
される。[0010] As shown in FIG.
Has a lower shoe 12 and an upper shoe 14, and the lower shoe 12 and the upper shoe 14
And are guided by the bush 18 so as to be relatively movable forward and backward.
【００１１】下部シュー１２には、押えポンチ２０が固
着され、この押えポンチ２０の外周段部にブランクホル
ダ２２が載置される。ブランクホルダ２２は、押圧ピン
２４に係合するとともに、このブランクホルダ２２上に
据込みポンチ２６が載置される。この据込みポンチ２６
の先端面は、ワークＷの円筒部Ｓの開放端部Ｓ2 に係合
する。押えポンチ２０の内部には、ノックアウト２８が
スプリング３０を介して昇降自在に配設される。A holding punch 20 is fixed to the lower shoe 12, and a blank holder 22 is placed on the outer peripheral step of the holding punch 20. The blank holder 22 is engaged with the pressing pin 24, and the upsetting punch 26 is placed on the blank holder 22. This upsetting punch 26
The distal end surface of the engages the open end S 2 of the cylindrical portion S of the workpiece W. A knockout 28 is arranged inside the presser punch 20 via a spring 30 so as to be able to move up and down.
【００１２】上部シュー１４には、ダイホルダ３２を介
して上ダイ３４が装着され、この上ダイ３４の内周面に
ワークＷの円筒部Ｓの外周端部Ｓ1 側を押圧するための
突起部３６が形成される。この突起部３６の角部には円
弧面３６ａが形成されている（図３乃至５参照）。上ダ
イ３４の内周面と据込みポンチ２６と押えポンチ２０の
外周面との間には、ワークＷの円筒部Ｓを厚肉化するた
めの空間Ｐが形成される（図３参照）。[0012] the upper shoe 14, the upper die 34 is mounted via a die holder 32, projections for pressing the outer circumferential edge portion S 1 side of the cylindrical portion S of the workpiece W on the inner circumferential surface of the upper die 34 36 are formed. An arc surface 36a is formed at a corner of the protrusion 36 (see FIGS. 3 to 5). A space P for increasing the thickness of the cylindrical portion S of the work W is formed between the inner peripheral surface of the upper die 34 and the outer peripheral surfaces of the upsetting punch 26 and the holding punch 20 (see FIG. 3).
【００１３】ダイホルダ３２の内部に、パッド３８がス
プリング４０を介して昇降自在に支持されるとともに、
このパッド３８の内部には、上部シュー１４に固着され
たポンチ４２が配設される。A pad 38 is supported inside the die holder 32 via a spring 40 so as to be movable up and down.
A punch 42 fixed to the upper shoe 14 is provided inside the pad 38.
【００１４】このように構成されるプレス成形装置１０
を使用して、本実施例に係る厚肉化プレス加工方法を実
施する手順について以下に説明する。The press forming apparatus 10 constructed as described above
The procedure for carrying out the thickening press working method according to the present embodiment by using is described below.
【００１５】まず、下部シュー１２と上部シュー１４と
が型開きされた状態で、ワークＷの円筒部Ｓの開放端部
Ｓ2 が据込みポンチ２６の先端部に載置される。そこ
で、下部シュー１２と上部シュー１４とが相対的に近接
する方向に変位すると、パッド３８がワークＷのフラン
ジ部分を押圧保持するとともに、上ダイ３４の突起部３
６がこのワークＷの円筒部Ｓの外周端部Ｓ1 側に係合す
る（図３参照）。First, with the lower shoe 12 and the upper shoe 14 opened, the open end S 2 of the cylindrical portion S of the work W is placed on the tip of the upsetting punch 26. Therefore, when the lower shoe 12 and the upper shoe 14 are displaced in a direction in which they are relatively close to each other, the pad 38 presses and holds the flange portion of the work W, and the protrusion 3 of the upper die 34.
6 is engaged with the outer peripheral edge portion S 1 side of the cylindrical portion S of the workpiece W (see FIG. 3).
【００１６】この状態で、円筒部Ｓの開放端部Ｓ2 が据
込みポンチ２６に当接する一方、この円筒部Ｓの外周端
部Ｓ1 側が上ダイ３４の突起部３６の円弧面３６ａに当
接している。このため、下部シュー１２と上部シュー１
４とがさらに相対的に近接変位すると、据込みポンチ２
６の押圧力が付与されている円筒部Ｓは、軸方向（矢印
Ａ方向）への塑性流動が阻止されて空間Ｐ内で半径方向
（矢印Ｂ方向）外方に塑性流動を生じる（図４参照）。In this state, the open end S 2 of the cylindrical portion S comes into contact with the upsetting punch 26, while the outer peripheral end S 1 of the cylindrical portion S comes into contact with the arc surface 36 a of the projection 36 of the upper die 34. In contact. Therefore, the lower shoe 12 and the upper shoe 1
4 is further displaced relatively close to each other.
6, the plastic flow in the axial direction (direction of arrow A) is prevented, and plastic flow is generated radially outward (direction of arrow B) in the space P (FIG. 4). reference).
【００１７】そして、図５に示すように型締めされた状
態では、ワークＷの円筒部Ｓが空間Ｐ内に圧縮充填され
て厚肉化処理が終了する。次に、型開きされることによ
り、ノックアウト２８がスプリング３０の弾初力を介し
て上昇し、厚肉化処理終了後のワークＷが離型される。When the mold is clamped as shown in FIG. 5, the cylindrical portion S of the work W is compressed and filled in the space P, and the thickening process is completed. Next, by opening the mold, the knockout 28 rises through the elastic initial force of the spring 30, and the workpiece W after the completion of the thickening process is released.
【００１８】この場合、本実施例では、円筒部Ｓの開放
端部Ｓ2 が据込みポンチ２６に当接する一方、この円筒
部Ｓの外周端部Ｓ1 側が上ダイ３４の突起部３６の円弧
面３６ａに当接した状態で、前記据込みポンチ２６が該
円筒部Ｓを軸方向（矢印Ａ方向）に押圧している。従っ
て、円筒部Ｓは、上ダイ３４と据込みポンチ２６と押え
ポンチ２０との間に形成された空間Ｐ内に塑性流動して
円滑に厚肉化されるとともに、特に、図４に示すよう
に、円筒部Ｓの外周端部Ｓ1 側に係合する上ダイ３４の
突起部３６の押圧作用下にこの円筒部Ｓに巻き込みによ
るヒケや座屈等が発生することを確実に阻止することが
できるという効果が得られる。これによって、簡単な構
成からなるプレス成形装置１０を使用してワークＷの円
筒部Ｓの厚肉化処理を高精度かつ効率的に行うことが可
能になるという利点が得られる。In this case, in this embodiment, the open end S 2 of the cylindrical portion S abuts on the upsetting punch 26, while the outer peripheral end S 1 of the cylindrical portion S has an arc of the projection 36 of the upper die 34. The upsetting punch 26 presses the cylindrical portion S in the axial direction (the direction of the arrow A) in a state of being in contact with the surface 36a. Therefore, the cylindrical portion S plastically flows into the space P formed between the upper die 34, the upsetting punch 26, and the presser punch 20, and is smoothly thickened. In particular, as shown in FIG. In addition, it is necessary to reliably prevent sinks, buckling, and the like caused by being caught in the cylindrical portion S under the pressing action of the protrusion 36 of the upper die 34 which engages with the outer peripheral end portion S 1 of the cylindrical portion S. Is obtained. Thereby, there is obtained an advantage that the thickness of the cylindrical portion S of the work W can be increased with high accuracy and efficiency by using the press forming apparatus 10 having a simple configuration.
【００１９】[0019]
【発明の効果】以上のように、本発明に係る厚肉化プレ
ス加工方法によれば、以下の効果乃至利点が得られる。As described above, according to the thickening press working method according to the present invention, the following effects and advantages can be obtained.
【００２０】カップ状部材の周端部を折り曲げて設けら
れた円筒部の開放端部が軸方向に押圧される際、この円
筒部の折曲部位の外周端縁側が拘束されている。このた
め、円筒部は、軸方向への塑性流動が阻止されて厚肉化
加工が円滑に行われるとともに、前記円筒部の折曲部位
外周端縁側が拘束されることによって該円筒部に座屈や
ヒケ等が発生することを確実かつ容易に防止することが
できる。従って、簡単な構成からなるプレス加工装置に
より、高精度かつ効率的な厚肉化処理が遂行される。When the open end of the cylindrical portion provided by bending the peripheral end of the cup-shaped member is pressed in the axial direction, the outer peripheral edge of the bent portion of the cylindrical portion is restrained. For this reason, the cylindrical portion is prevented from plastic flow in the axial direction, the thickening process is performed smoothly, and the cylindrical portion is buckled by being restrained at the bent portion outer peripheral edge side. It is possible to reliably and easily prevent the occurrence of sink marks and the like. Therefore, a highly accurate and efficient thickening process is performed by a press working device having a simple configuration.
【図１】本発明に係る厚肉化プレス加工方法を実施する
ためのプレス加工装置の概略縦断面図である。FIG. 1 is a schematic longitudinal sectional view of a press working apparatus for performing a thickening press working method according to the present invention.
【図２】前記厚肉化プレス加工方法により厚肉化処理さ
れるカップ状部材であるワークの縦断説明図である。FIG. 2 is an explanatory longitudinal sectional view of a work as a cup-shaped member subjected to a thickening process by the thickening press working method.
【図３】前記プレス加工装置によりワークの加工が開始
された状態の一部説明図である。FIG. 3 is a partial explanatory view of a state in which processing of a workpiece has been started by the press processing apparatus.
【図４】前記プレス加工装置によりワークの加工途上の
状態の一部説明図である。FIG. 4 is a partial explanatory view of a state in which a work is being processed by the press working device.
【図５】前記プレス加工装置によりワークの加工が終了
した状態の一部説明図である。FIG. 5 is a partial explanatory view of a state in which processing of a workpiece has been completed by the press processing apparatus.
１０…プレス加工装置 １２…下部シュ
ー １４…上部シュー ２０…押えポン
チ ２６…据込みポンチ ３４…上ダイ ３６…突起部 ３８…パッドDESCRIPTION OF SYMBOLS 10 ... Press processing apparatus 12 ... Lower shoe 14 ... Upper shoe 20 ... Holding punch 26 ... Upsetting punch 34 ... Upper die 36 ... Projection part 38 ... Pad
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平７−155888（ＪＰ，Ａ) 特開 平７−155883（ＪＰ，Ａ) 特開 平６−23463（ＪＰ，Ａ) 特開 昭61−140327（ＪＰ，Ａ) 特開 平３−186643（ＪＰ，Ａ) 特開 昭56−41020（ＪＰ，Ａ) 特開 平４−258337（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B21J 1/00 - 13/14 B21J 17/00 - 19/04 B21K 1/00 - 31/00 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-155888 (JP, A) JP-A-7-155883 (JP, A) JP-A-6-23463 (JP, A) JP-A 61-155 140327 (JP, A) JP-A-3-186643 (JP, A) JP-A-56-41020 (JP, A) JP-A-4-258337 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B21J 1/00-13/14 B21J 17/00-19/04 B21K 1/00-31/00
Claims (1)
ップ状部材の本体部と同軸的に設けられた円筒部に対
し、プレス加工を施して該円筒部を厚肉化するための厚
肉化プレス加工方法であって、 前記円筒部の折曲部位の外周端縁部側にダイ部材に設け
られた突起部の円弧面を係合させるとともに、前記円筒
部の前記折曲部位とは反対側の開放端部にポンチを係合
させ、前記ダイ部材と前記ポンチとを相対的に近接する
方向に変位させることにより、前記円筒部の軸方向およ
び半径方向内方への塑性流動を阻止しながら、該円筒部
を半径方向外方にのみ厚肉化させることを特徴とする厚
肉化プレス加工方法。1. A thickness for bending a peripheral portion of a cup-shaped member and press-working a cylindrical portion provided coaxially with a main body of the cup-shaped member to increase the thickness of the cylindrical portion. A method for processing a meat press, wherein a die member is provided on an outer peripheral edge side of a bent portion of the cylindrical portion.
Engaging the arc surface of the projected portion and engaging the punch with the open end of the cylindrical portion opposite to the bent portion.
And make the die member and the punch relatively close to each other.
The Rukoto is displaced in a direction, Oyo axial direction of the cylindrical portion
While preventing plastic flow of the fine radially inward, thickening press-forming method according to claim Rukoto is only thickening the cylindrical portion radially outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33069693A JP3281471B2 (en) | 1993-12-27 | 1993-12-27 | Thickening press processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33069693A JP3281471B2 (en) | 1993-12-27 | 1993-12-27 | Thickening press processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07185726A JPH07185726A (en) | 1995-07-25 |
| JP3281471B2 true JP3281471B2 (en) | 2002-05-13 |
Family
ID=18235548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33069693A Expired - Fee Related JP3281471B2 (en) | 1993-12-27 | 1993-12-27 | Thickening press processing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3281471B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100893211B1 (en) * | 2007-10-19 | 2009-04-16 | 주식회사 동희산업 | The guide bracket and manufacturing method of guide bracket |
| JP4938715B2 (en) * | 2008-04-01 | 2012-05-23 | 株式会社丸順 | Manufacturing method for thickened press products |
| WO2013170401A1 (en) * | 2012-05-18 | 2013-11-21 | Cui Xuejun | New method for producing surrounding connection of heat-insulating protecting component |
| KR101637139B1 (en) * | 2012-11-09 | 2016-07-06 | 신닛테츠스미킨 카부시키카이샤 | Press molding method |
| CN103143605B (en) * | 2013-03-25 | 2014-12-24 | 烟台瑞斯克数控机械有限公司 | Plate flanging, bending, forming and trimming machine |
-
1993
- 1993-12-27 JP JP33069693A patent/JP3281471B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07185726A (en) | 1995-07-25 |
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