JP2676303B2 - Thickening press working method - Google Patents
Thickening press working methodInfo
- Publication number
- JP2676303B2 JP2676303B2 JP5011844A JP1184493A JP2676303B2 JP 2676303 B2 JP2676303 B2 JP 2676303B2 JP 5011844 A JP5011844 A JP 5011844A JP 1184493 A JP1184493 A JP 1184493A JP 2676303 B2 JP2676303 B2 JP 2676303B2
- Authority
- JP
- Japan
- Prior art keywords
- edge
- punch
- work
- pressing
- 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 - Fee Related
Links
Landscapes
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、カップ状のワーク又は
Ｕ字形のワークのように、端部に屈曲した突縁をもつワ
ークにおいて、該突縁を増肉するためのプレス加工方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressing method for increasing the thickness of a work having a bent edge at its end such as a cup-shaped work or a U-shaped work.
【０００２】[0002]
【従来の技術】従来の増肉方法としては、例えば図２、
図３に示す方法が知られている。図２（ａ）において、
ワークＷの突縁ａがダイスｂの内周面に密接する状態
で、ワークＷをダイスｂと押さえパンチｃで挟持し、据
込みパンチｄで突縁ａの端面を加圧するようになってい
る。この方法においては、突縁ａの隅角ｅの底部側が変
形しにくいため、空所ｆの全体を充満させるように変形
させることはできず、図２（ｂ）に示すように、下部に
肉の巻込みが生じて亀裂ｇが入り易い。2. Description of the Related Art As a conventional thickening method, for example, FIG.
The method shown in FIG. 3 is known. In FIG. 2A,
With the projecting edge a of the work W being in close contact with the inner peripheral surface of the die b, the work W is sandwiched between the die b and the pressing punch c, and the end surface of the projecting edge a is pressed by the upsetting punch d. . In this method, since the bottom side of the corner e of the protruding edge a is difficult to be deformed, it cannot be deformed so as to fill the entire space f, and as shown in FIG. Is easily involved and cracks g easily form.
【０００３】また、図２の方法において、突縁ａが小径
でその外周側に空所が存在する場合も、隅角ｅの底部側
が拡大されにくく、隅角外周下部にしわが生じ易い。Further, in the method of FIG. 2, even when the projecting edge a has a small diameter and there is a void on the outer peripheral side thereof, the bottom side of the corner angle e is difficult to expand, and wrinkles are likely to occur at the lower corner outer periphery.
【０００４】図３は、図２に示す方法の欠点を改善すべ
く提案されたもの（特開昭６１−１４０３２７）であ
り、図３（ａ）に示すように、突縁ａの外周に空所ｆを
設け、加圧面を内向きのテーパ面とした据込みパンチｈ
で図３（ｂ）に示すように加圧し、突縁ａを押さえパン
チｃ側に圧着しながら外向きの肉の流れを生じさせ、亀
裂又はしわを生じさせることなく増肉を行うようにして
いる。しかし、この方法によれば、突縁ａの頂面が外向
きのテーパ面となるため、図３（ｃ）に示すように、後
加工でテーパ部ｉを切削除去して平坦面にしなければな
らず、手間がかかり費用がかさむ不都合がある。FIG. 3 is a proposal (Japanese Patent Application Laid-Open No. 61-140327) to improve the drawbacks of the method shown in FIG. 2. As shown in FIG. Upsetting punch h, which is provided with location f and has a pressing surface with an inwardly tapered surface
As shown in FIG. 3 (b), pressure is applied to press the projecting edge a against the punch c to cause outward flow of the meat and increase the thickness without causing cracks or wrinkles. There is. However, according to this method, the top surface of the projecting edge a becomes an outwardly tapered surface, so as shown in FIG. 3C, the tapered portion i must be cut and removed to be a flat surface in post processing. In addition, there is an inconvenience that it is troublesome and expensive.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、増肉後亀裂
やしわが入らず、切削加工も必要としない加工方法を得
ることを課題とする。SUMMARY OF THE INVENTION An object of the present invention is to obtain a processing method which does not cause cracks or wrinkles after thickening and does not require cutting.
【０００６】[0006]
【課題を解決するための手段】本発明における前記課題
の解決手段は、端部を湾曲して形成した突縁をもつワー
クを、ダイスと押さえパンチで保持し、ダイス内周と押
さえパンチ外周の間の空間内で前記突縁を据込みパンチ
で圧縮する増肉プレス加工方法において、平板状のワー
クの端部にテーパ面を成形する第１工程と、該テーパ面
を内側にして深絞りをして突縁を形成する第２工程と、
該突縁の外径より大径のダイと、突縁の内径と同径で隅
角の曲率半径が突縁の隅角内面の曲率半径より小さい押
さえパンチとでワークを挾圧しながら、突縁の端部を平
坦な加圧面をもつ据込みパンチで加圧する第３工程とを
備えることを特徴とする。Means for Solving the Problems According to the means for solving the problems in the present invention, a work having a projecting edge formed by bending an end portion is held by a die and a holding punch, and the inner circumference of the die and the outer circumference of the holding punch are held. In the thickening press working method in which the projecting edge is compressed by an upsetting punch in a space between them, a first step of forming a tapered surface on an end portion of a flat plate-shaped work, and deep drawing with the tapered surface inside And a second step of forming a projecting edge,
A die having a diameter larger than the outer diameter of the projecting edge and a pressing punch having the same diameter as the inner diameter of the projecting edge and a radius of curvature of the angle smaller than the radius of curvature of the inner surface of the angle of the projecting edge while pressing the work And a third step of pressurizing the end portion of the blade with an upsetting punch having a flat pressure surface.
【０００７】[0007]
【作用】前記の第１工程でワークの端部にテーパ面が形
成され、第２工程でテーパ面を内側にして外周側が高い
突縁が形成される。第３工程ではワークの隅角が押さえ
パンチの隅角で拡径方向に押出されると共に、据込みパ
ンチによる加圧時に突縁の外周部分の頂部が特に押され
るためワークの隅角下側に肉寄せする作用が加わり、増
肉時に隅角外面にしわが生じない。In the first step, the tapered surface is formed on the end of the work, and in the second step, the outer peripheral side is formed with the tapered surface as the inner side. In the third step, the corner angle of the work is extruded in the radial direction by the corner angle of the pressing punch, and the top of the outer peripheral portion of the projecting edge is pushed especially when pressed by the upsetting punch. The action of bringing meat together is added, and wrinkles do not occur on the outer surface of the corner when thickening.
【０００８】[0008]
【実施例】以下、図面に従って本発明の実施例を説明す
る。図１（ａ）において、１は金属板からなる円形のワ
ークであり、該ワーク１を図１（ｂ）に示す第１工程
で、テーパパンチ３と受け型２で加圧して外周側にテー
パ面４を形成する。次に図１（ｃ）の第２工程で、ダイ
５とパンチ６によって、ワーク１をカップ形に深絞り
し、内側面が曲率半径Ｒをもつ隅角７とこれに続く突縁
８を形成する。前記曲率半径Ｒは、絞り加工時に成形し
易い寸法とする。Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1A, reference numeral 1 is a circular work made of a metal plate, and the work 1 is pressed by a taper punch 3 and a receiving die 2 in the first step shown in FIG. 4 is formed. Next, in the second step of FIG. 1C, the work 1 is deep-drawn into a cup shape by the die 5 and the punch 6 to form a corner angle 7 having a radius of curvature R on the inner surface and a projecting edge 8 following it. To do. The radius of curvature R is set to a dimension that facilitates shaping during drawing.
【０００９】図１（ｄ）の第３工程で使用するダイ９
は、内径が前記ダイ５より大きく、押さえパンチ１０
は、前記パンチ６と同径であるが、隅角１１の曲率半径
ｒは前記Ｒより小さくされている。ダイ９と押さえパン
チ１０の直径差で生じる空間１２には、リング状の据込
みパンチ１３が配置され、押さえパンチ１０と同時又は
略同期して下降するようにされている。Die 9 used in the third step of FIG. 1 (d)
Has an inner diameter larger than that of the die 5 and has a holding punch 10.
Has the same diameter as the punch 6, but the radius of curvature r of the corner 11 is smaller than R. A ring-shaped upsetting punch 13 is arranged in a space 12 created by a difference in diameter between the die 9 and the pressing punch 10 and is lowered simultaneously with or substantially in synchronization with the pressing punch 10.
【００１０】押さえパンチ１０の下降により、ワーク１
の隅角７の内周面は、押さえパンチ１０の隅角１１に押
されて矢印１４方向に肉寄せされ、これと共に据込みパ
ンチ１３の下降により突縁８は圧縮され、突縁８の外周
側の頂点部分が特に大きな力で押されて隅角７の外周下
部を下向きに押出すように矢印１５方向に肉寄せするか
ら、突縁８は、最終的に図１（ｅ）に示すように空間１
２内に充満した状態になり、端面が平坦で増肉された、
しわのない突縁８が形成される。By lowering the pressing punch 10, the work 1
The inner peripheral surface of the corner angle 7 is pressed by the corner angle 11 of the pressing punch 10 to be brought closer to the direction of the arrow 14, and the protruding edge 8 is compressed by the descending of the upsetting punch 13, and the outer periphery of the protruding edge 8 is Since the apex portion on the side is pushed by a particularly large force and the lower part of the outer periphery of the corner 7 is pushed downward in the direction of the arrow 15, the projecting edge 8 is finally as shown in FIG. 1 (e). In space 1
2 was filled, the end face was flat and the wall thickness was increased.
A wrinkle-free flange 8 is formed.
【００１１】[0011]
【発明の効果】以上のように本発明は、押さえパンチの
隅角の曲率半径をワーク内面の隅角の曲率半径より小さ
くすることと、ワークの突縁の外周側を高くすることで
隅角への肉寄せを容易にしたため、簡単な手段でしわの
ない増肉をすることができる利点を有する。As described above, according to the present invention, the radius of curvature of the corner of the pressing punch is made smaller than the radius of curvature of the corner of the inner surface of the work, and the outer peripheral side of the projecting edge of the work is increased. Since it is easy to bring the meat to the skin, there is an advantage that the meat can be increased without wrinkles by a simple means.
【図１】 本発明の工程説明図FIG. 1 is a process explanatory view of the present invention.
【図２】 従来技術の工程説明図FIG. 2 is a process explanatory diagram of a conventional technique.
【図３】 他の従来技術の工程説明図FIG. 3 is a process explanatory diagram of another conventional technique.
１ ワーク ３ テーパパンチ ４ テーパ面 ５、９ ダイ ６ パンチ ７、１１ 隅角 ８ 突部 １０ 押さえパンチ １３ 据込みパンチ 1 Work 3 Tapered Punch 4 Tapered Surface 5, 9 Die 6 Punch 7, 11 Corner Angle 8 Projection 10 Holding Punch 13 Upsetting Punch
Claims (1)
クを、ダイスと押さえパンチで保持し、 ダイス内周と押さえパンチ外周の間の空間内で前記突縁
を据込みパンチで圧縮する増肉プレス加工方法におい
て、 平板状のワークの端部にテーパ面を成形する第１工程
と、 該テーパ面を内側にして深絞りをして突縁を形成する第
２工程と、 該突縁の外径より大径のダイと、突縁の内径と同径で隅
角の曲率半径が突縁の隅角内面の曲率半径より小さい押
さえパンチとでワークを挾圧しながら、突縁の端部を平
坦な加圧面をもつ据込みパンチで加圧する第３工程と、 を備えることを特徴とする、増肉プレス加工方法。1. A work having an edge formed with a curved end is held by a die and a pressing punch, and the edge is compressed by an upsetting punch in a space between an inner circumference of the die and an outer circumference of the pressing punch. In the thickening press working method, a first step of forming a tapered surface on an end portion of a flat plate-shaped work, a second step of deep drawing with the tapered surface inside, and forming a protruding edge; While holding the work with a die with a diameter larger than the outer diameter of the edge and a pressing punch with the same diameter as the inner diameter of the edge and a radius of curvature of the corner angle smaller than the radius of curvature of the inner surface of the edge of the edge, the edge of the edge is pressed. And a third step of pressing the portion with an upsetting punch having a flat pressing surface, and a thickening press working method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5011844A JP2676303B2 (en) | 1993-01-27 | 1993-01-27 | Thickening press working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5011844A JP2676303B2 (en) | 1993-01-27 | 1993-01-27 | Thickening press working method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06218442A JPH06218442A (en) | 1994-08-09 |
| JP2676303B2 true JP2676303B2 (en) | 1997-11-12 |
Family
ID=11789035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5011844A Expired - Fee Related JP2676303B2 (en) | 1993-01-27 | 1993-01-27 | Thickening press working method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2676303B2 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020075099A (en) * | 2001-03-23 | 2002-10-04 | 김병준 | Press apparatus |
| KR20030025774A (en) * | 2002-01-30 | 2003-03-29 | 김상수 | Mothod for manufacturing kick down drum for automatic transmission of automobile |
| FR2910827B1 (en) * | 2006-12-28 | 2010-01-01 | Faurecia Sys Echappement | THIN PIECE PIECE, EXHAUST ELEMENT COMPRISING SUCH A THIN PIECE PART, METHOD AND DEVICE FOR THEIR MANUFACTURE |
| KR101288853B1 (en) * | 2012-07-25 | 2013-07-23 | 한국기계연구원 | Cold forging mold for sector tooth of seat recliner and method for manufacturing sector tooth using thereof |
| JP5949462B2 (en) * | 2012-11-02 | 2016-07-06 | 新日鐵住金株式会社 | Partial thickening method for cylindrical containers |
| MX357962B (en) * | 2013-01-09 | 2018-08-01 | Nippon Steel & Sumitomo Metal Corp | Press-forming method. |
| WO2014109245A1 (en) * | 2013-01-09 | 2014-07-17 | 新日鐵住金株式会社 | Press-forming method |
| JP6051052B2 (en) | 2013-01-11 | 2016-12-21 | 株式会社エフ・シー・シー | Press part molding method, press part manufacturing method, and press part molding die |
| JP5971215B2 (en) | 2013-09-11 | 2016-08-17 | トヨタ自動車株式会社 | Suspension tower plate and suspension tower |
| CN105682823B (en) * | 2013-11-29 | 2017-08-29 | 新日铁住金株式会社 | Manufacturing process with round-ended cylinder container |
| JP2014221493A (en) * | 2014-09-02 | 2014-11-27 | 住友電気工業株式会社 | Press body |
| KR102036062B1 (en) * | 2015-04-28 | 2019-10-24 | 닛폰세이테츠 가부시키가이샤 | Press processing apparatus and press processing method |
| DE102016116759A1 (en) * | 2016-09-07 | 2018-03-08 | Thyssenkrupp Ag | Method and tool for the production of sheet metal components |
| DE102016118418A1 (en) | 2016-09-29 | 2018-03-29 | Thyssenkrupp Ag | Method for producing a molded component with a dimensionally stable frame area |
| CN118019601A (en) * | 2021-10-20 | 2024-05-10 | 松下控股株式会社 | Metal plate and wiring device |
-
1993
- 1993-01-27 JP JP5011844A patent/JP2676303B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06218442A (en) | 1994-08-09 |
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