JP2000202534A - Method for deciding flange shape in press product - Google Patents
Method for deciding flange shape in press productInfo
- Publication number
- JP2000202534A JP2000202534A JP11008051A JP805199A JP2000202534A JP 2000202534 A JP2000202534 A JP 2000202534A JP 11008051 A JP11008051 A JP 11008051A JP 805199 A JP805199 A JP 805199A JP 2000202534 A JP2000202534 A JP 2000202534A
- Authority
- JP
- Japan
- Prior art keywords
- shape
- product
- line
- flange
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、プレス製品の成形
シミュレーションにおいて所定形状の素材から製品をプ
レス成形した場合のフランジ形状を求めるためのプレス
製品におけるフランジ形状決定方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for determining a flange shape in a press product for obtaining a flange shape when a product is press-formed from a material having a predetermined shape in a press product forming simulation.
【０００２】[0002]
【従来の技術】従来、この種の成形シミュレーションを
コンピュータによって行うには、大きく分けて二つの有
限要素法（ＦＥＭ）が利用される。その一つは「逆解析
ＦＥＭ」と称され、完成製品の形状から必要最小限の素
材の展開図を求める計算手法である。他の一つは「増分
ＦＥＭ」と称されるもので、与えられた素材形状からそ
の変形過程を計算し、プレス成形後のフランジを有する
製品形状を求める手法である。2. Description of the Related Art Conventionally, two types of finite element methods (FEM) have been used to perform this type of molding simulation by computer. One of them is called "inverse analysis FEM", which is a calculation method for obtaining a development diagram of a minimum necessary material from the shape of a completed product. The other is called "incremental FEM", which is a method of calculating the deformation process from a given material shape and obtaining a product shape having a flange after press forming.
【０００３】前記フランジは製品の一部ではなく、した
がって最終的には切り取られるのであるが、製品の搬送
時などにおいてフィンガーでつかむ部分として有効に利
用される。このためフランジ形状や寸法を予め求めるこ
とは重要である。なお特開平６−１２６３５３号公報に
は、トルク伝達用の駆動軸などに対してフランジを取り
付ける技術が開示されているが、これは前記のようにプ
レス製品のフランジ形状をシミュレーションする技術と
は直接関係がない。[0003] The flange is not part of the product and is eventually cut off, but is effectively used as a portion to be gripped by a finger when transporting the product. Therefore, it is important to obtain the flange shape and dimensions in advance. Japanese Patent Application Laid-Open No. 6-126353 discloses a technique for attaching a flange to a drive shaft or the like for transmitting torque. However, this technique is directly related to the technique for simulating the flange shape of a pressed product as described above. Has nothing to do.
【０００４】[0004]
【発明が解決しようとする課題】さて前記「逆解析ＦＥ
Ｍ」によるシミュレーションは比較的容易であり、必要
最小限の素材の展開図を正確に描き出すことができる。
しかしこの展開図では、その製品を任意の素材形状から
成形した場合のフランジ形状を求めることができない。
これに対し、前記「増分ＦＥＭ」のシミュレーションに
よればフランジ形状まで求めることができる。しかしそ
のためにはシミュレーションを何度も繰り返す必要があ
り、時間のかかる作業となる。The above-mentioned "Inverse analysis FE"
The simulation using “M” is relatively easy, and a development view of the minimum necessary material can be accurately drawn.
However, in this developed view, the flange shape when the product is formed from an arbitrary material shape cannot be obtained.
On the other hand, according to the simulation of the “incremental FEM”, even the flange shape can be obtained. However, this requires repeated simulations, which is a time-consuming operation.
【０００５】本発明は前記課題を解決しようとするもの
で、その目的は、任意に決めた素材形状によって製品を
プレス成形したときのフランジ形状を容易にシミュレー
ション可能とすることである。An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to make it possible to easily simulate a flange shape when a product is press-formed with an arbitrarily determined material shape.
【０００６】[0006]
【課題を解決するための手段】本発明は前記目的を達成
するためのもので、請求項１記載の発明は、プレス製品
の製品形状からそれを成形するのに必要な最小限の素材
の展開図を求め、この展開図と任意に決めた素材形状と
の線長差を製品形状の外形ラインにおける複数のポイン
トで求め、この線長差と製品素材の材質に基づく伸び率
とにより、前記素材形状の素材から製品をプレス成形し
た場合のフランジ形状を求めることを特徴とする。なお
前記の製品形状は決定要素であり、展開図は例えば前記
の「逆解析ＦＥＭ」によって製品形状から容易に求める
ことができる要素である。また展開図と素材形状との線
長差とは、要するに素材形状のうち、製品として成形さ
れる部分以外の部分の線長である。SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and the invention according to claim 1 is a development of a minimum material necessary for forming a pressed product from a product shape. A figure is obtained, and a line length difference between this developed view and an arbitrarily determined material shape is obtained at a plurality of points in an outer shape line of the product shape. It is characterized in that a flange shape when a product is press-formed from a shape material is obtained. The product shape is a determining factor, and the developed view is an element that can be easily obtained from the product shape by, for example, the above-mentioned “inverse analysis FEM”. The line length difference between the developed view and the material shape is, in short, the line length of a portion of the material shape other than the portion molded as a product.
【０００７】また請求項２記載の発明は、請求項１記載
のプレス製品におけるフランジ形状決定方法において、
前記素材形状、展開図及び製品形状をそれぞれ重ね合わ
せ、製品形状の外形ラインにおける複数のポイントと、
これらに対応する展開図の外形ライン上のポイントとを
結んだ直線を素材形状の外形ラインまで延長し、これら
の直線上において展開図と素材形状との線長差を求める
とともに、この線長差と伸び率との積によって求めた値
を、製品形状の外形ラインからの距離として各直線上に
ポイントを付し、これらのポイントを互いに結んで前記
フランジ形状を求めることを特徴とする。According to a second aspect of the present invention, there is provided a method for determining a flange shape in a pressed product according to the first aspect,
The material shape, the development view and the product shape are each overlapped, and a plurality of points in the outer shape line of the product shape,
Extend the straight line connecting the points on the outline line of the development diagram corresponding to these to the outline line of the material shape, find the line length difference between the development diagram and the material shape on these straight lines, and The value obtained by multiplying the product of the product and the elongation is given a point on each straight line as a distance from the outer shape line of the product shape, and these points are connected to each other to obtain the flange shape.
【０００８】このように請求項１または２記載の発明に
よれば、製品形状、その展開図及び任意に決めた素材形
状から簡単にフランジ形状を求めることができる。した
がって求められたフランジ形状が、製品の搬送時にフィ
ンガーでつかむ部分として適正な形状であるか否か、必
要なプレス型のサイズはどれくらいか、といったような
検討を前もって行うことができる。As described above, according to the first or second aspect of the present invention, the flange shape can be easily obtained from the product shape, the developed view thereof, and the arbitrarily determined material shape. Therefore, it can be examined in advance whether or not the obtained flange shape is an appropriate shape as a portion to be gripped by a finger when the product is transported, and what is the required size of the press die.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態を説明
する。図１（Ａ）はプレスで成形される製品の製品形状
１０を表した斜視図、図１（Ｂ）はその平面図、図２
（Ａ）は製品形状１０の展開図２０を表した斜視図、図
２（Ｂ）はその平面図である。図１の製品形状１０は成
形しようとするプレス製品の数値データに基づき、コン
ピュータによって容易に描くことができる。また前記展
開図２０はプレス製品を成形するのに必要な最小限の大
きさであって、すでに説明したようにコンピュータによ
る「逆解析ＦＥＭ」の数値計算手法により製品形状１０
から容易に求めることができる。Embodiments of the present invention will be described below. FIG. 1A is a perspective view showing a product shape 10 of a product formed by pressing, FIG. 1B is a plan view thereof, and FIG.
2A is a perspective view showing a developed view 20 of the product shape 10, and FIG. 2B is a plan view thereof. The product shape 10 shown in FIG. 1 can be easily drawn by a computer based on numerical data of a pressed product to be formed. The developed view 20 is the minimum size necessary for forming the pressed product. As described above, the product shape 10 is calculated by the numerical calculation method of “inverse analysis FEM” by the computer as described above.
Can be easily obtained from
【００１０】図３は製品形状１０、展開図２０及び素材
形状３０をそれぞれ重ね合わせた状態の説明図である。
この素材形状３０は展開図２０よりも大きい面積で、か
つ実際の素材に合わせた矩形状を任意に決めたものであ
る。したがってこの素材形状３０は、つぎに説明する手
法で得られるフランジ形状４０の結果いかんによっては
形状設定をやり直す場合がある。FIG. 3 is an explanatory view showing a state in which the product shape 10, the developed view 20, and the material shape 30 are superimposed on each other.
The material shape 30 has an area larger than that of the developed view 20 and is arbitrarily determined to be a rectangular shape according to the actual material. Therefore, the shape of the material shape 30 may be set again depending on the result of the flange shape 40 obtained by the method described below.
【００１１】図４は図３の一部を拡大して表した説明図
である。主としてこの図４によって前記の素材形状３０
から製品をプレス成形した場合のフランジ形状４０を求
める手法を説明する。なお以下の作業は全てコンピュー
タによって処理するものとする。まず図４（Ａ）で示す
ように製品形状１０の外形ライン１４上において任意に
選定したポイントａと、展開図２０の外形ライン２４上
におけるポイントａに対応する箇所のポイントｂとを直
線で結ぶ。そしてこの直線を素材形状３０の外形ライン
３４まで延長し、その交点をポイントｃとする。FIG. 4 is an explanatory diagram showing an enlarged part of FIG. Mainly according to FIG.
A method for obtaining a flange shape 40 when a product is press-formed from will be described. The following operations are all processed by a computer. First, as shown in FIG. 4A, a point a arbitrarily selected on the outer shape line 14 of the product shape 10 and a point b corresponding to the point a on the outer shape line 24 of the developed view 20 are connected by a straight line. . Then, this straight line is extended to the outer shape line 34 of the material shape 30, and the intersection is defined as a point c.
【００１２】つづいて前記の直線上における展開図２０
と素材形状３０との線長差、つまりポイントａ，ｃ間の
長さからポイントａ，ｂ間の長さを減じた値を求める。
そしてこの線長差と、実際に使用する素材の材質に基づ
いて設定した伸び率との積を求める。この値を図４
（Ｂ）で示すようにポイントａ（製品形状１０の外形ラ
イン１４上）から前記直線に沿った距離Ｓとしてポイン
トｅを付す。前記のポイントａ，ｂ，ｃの直線を製品形
状１０の外形ライン１４上における複数個所に設定し、
かつそれぞれの直線上に前記のポイントｅを付す。FIG. 20 is a developed view on the straight line.
The difference between the line length between the material and the material shape 30, that is, the value obtained by subtracting the length between the points a and b from the length between the points a and c is obtained.
Then, the product of the difference in the wire length and the elongation set based on the material of the material actually used is obtained. This value is shown in FIG.
As shown in (B), a point e is given as a distance S along the straight line from the point a (on the outer shape line 14 of the product shape 10). The straight lines of the points a, b, and c are set at a plurality of positions on the outer shape line 14 of the product shape 10,
In addition, the point e is provided on each straight line.
【００１３】最後に図４（Ｃ）で示すように前記の各ポ
イントｅを互いに結ぶことにより、素材形状３０の素材
から製品をプレス成形した場合のフランジ形状４０が得
られる。したがって製品形状１０、それに基づいて求め
た展開図２０、任意に決めた素材形状３０からフランジ
形状４０を簡単に求めることができ、プレス製品のシミ
ュレーションに際し、簡単な手法でフランジ形状４０を
正確に求めて検討することができる。Finally, as shown in FIG. 4 (C), by connecting the points e to each other, a flange shape 40 obtained when a product is press-formed from the material 30 is obtained. Therefore, the flange shape 40 can be easily obtained from the product shape 10, the developed view 20 obtained based on the product shape 10, and the arbitrarily determined material shape 30, and the flange shape 40 can be accurately obtained by a simple method when simulating a pressed product. Can be considered.
【図１】製品形状を表した説明図。FIG. 1 is an explanatory diagram showing a product shape.
【図２】展開図を表した説明図。FIG. 2 is an explanatory diagram showing a development view.
【図３】製品形状、展開図、素材形状をそれぞれ重ね合
わせた状態の説明図。FIG. 3 is an explanatory view of a state in which a product shape, a development view, and a material shape are superimposed on each other.
【図４】フランジ形状を求めるためのステップを表した
説明図。FIG. 4 is an explanatory view showing steps for obtaining a flange shape.
１０ 製品形状 １４ 外形ライン ２０ 展開図 ３０ 素材形状 ４０ フランジ形状 ａ，ｂ，ｃ，ｅ ポイント Ｓ 距離 10 Product shape 14 Outline line 20 Exploded view 30 Material shape 40 Flange shape a, b, c, e Point S Distance
Claims (2)
るのに必要な最小限の素材の展開図を求め、この展開図
と任意に決めた素材形状との線長差を製品形状の外形ラ
インにおける複数のポイントで求め、この線長差と製品
素材の材質に基づく伸び率とにより、前記素材形状の素
材から製品をプレス成形した場合のフランジ形状を求め
るプレス製品におけるフランジ形状決定方法。1. A development view of a minimum material required for forming a pressed product from a product shape of a pressed product is obtained, and a line length difference between the development view and an arbitrarily determined material shape is determined based on an outline line of the product shape. A method for determining a flange shape in a pressed product, wherein a flange shape when a product is press-formed from a material having the above-mentioned material shape is determined based on the difference in wire length and the elongation percentage based on the material of the product material.
ンジ形状決定方法において、前記素材形状、展開図及び
製品形状をそれぞれ重ね合わせ、製品形状の外形ライン
における複数のポイントと、これらに対応する展開図の
外形ライン上のポイントとを結んだ直線を素材形状の外
形ラインまで延長し、これらの直線上において展開図と
素材形状との線長差を求めるとともに、この線長差と伸
び率との積によって求めた値を、製品形状の外形ライン
からの距離として各直線上にポイントを付し、これらの
ポイントを互いに結んで前記フランジ形状を求めるプレ
ス製品におけるフランジ形状決定方法。2. The method for determining a flange shape in a press product according to claim 1, wherein the material shape, the development view, and the product shape are overlapped with each other, and a plurality of points on an outline line of the product shape and a development view corresponding thereto. Extend the straight line connecting the points on the outline line to the outline line of the material shape, find the line length difference between the developed view and the material shape on these straight lines, and calculate the product of this line length difference and the elongation rate. A method for determining a flange shape in a pressed product, in which a value obtained by the above is attached to each straight line as a distance from an outer shape line of a product shape, and these points are connected to each other to obtain the flange shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11008051A JP2000202534A (en) | 1999-01-14 | 1999-01-14 | Method for deciding flange shape in press product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11008051A JP2000202534A (en) | 1999-01-14 | 1999-01-14 | Method for deciding flange shape in press product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000202534A true JP2000202534A (en) | 2000-07-25 |
Family
ID=11682545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11008051A Withdrawn JP2000202534A (en) | 1999-01-14 | 1999-01-14 | Method for deciding flange shape in press product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000202534A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008006464A (en) * | 2006-06-29 | 2008-01-17 | Japan Research Institute Ltd | Drawn goods model preparing system and drawn goods model analyzing system provided with it, drawn goods model preparing program and drawn goods analyzing program provided with it |
| KR100812039B1 (en) * | 2001-08-02 | 2008-03-10 | 주식회사 포스코 | A METHOD FOR DETERMINING BLANK SHAPE for SINK MANUFACTURING PROCESS |
| CN107186092A (en) * | 2017-05-31 | 2017-09-22 | 汽红塔云南汽车制造有限公司 | A kind of drawing die die parting line method for determining position and calculator |
| CN112547890A (en) * | 2020-11-17 | 2021-03-26 | 西安飞机工业（集团）有限责任公司 | Stamping forming method of small-caliber deep cavity cap type part |
-
1999
- 1999-01-14 JP JP11008051A patent/JP2000202534A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100812039B1 (en) * | 2001-08-02 | 2008-03-10 | 주식회사 포스코 | A METHOD FOR DETERMINING BLANK SHAPE for SINK MANUFACTURING PROCESS |
| JP2008006464A (en) * | 2006-06-29 | 2008-01-17 | Japan Research Institute Ltd | Drawn goods model preparing system and drawn goods model analyzing system provided with it, drawn goods model preparing program and drawn goods analyzing program provided with it |
| CN107186092A (en) * | 2017-05-31 | 2017-09-22 | 汽红塔云南汽车制造有限公司 | A kind of drawing die die parting line method for determining position and calculator |
| CN112547890A (en) * | 2020-11-17 | 2021-03-26 | 西安飞机工业（集团）有限责任公司 | Stamping forming method of small-caliber deep cavity cap type part |
| CN112547890B (en) * | 2020-11-17 | 2022-07-12 | 西安飞机工业（集团）有限责任公司 | Stamping forming method of small-caliber deep cavity cap type part |
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