JPH0661581B2 - Manufacturing method of long flange products - Google Patents

Manufacturing method of long flange products

Info

Publication number
JPH0661581B2
JPH0661581B2 JP61299695A JP29969586A JPH0661581B2 JP H0661581 B2 JPH0661581 B2 JP H0661581B2 JP 61299695 A JP61299695 A JP 61299695A JP 29969586 A JP29969586 A JP 29969586A JP H0661581 B2 JPH0661581 B2 JP H0661581B2
Authority
JP
Japan
Prior art keywords
flange
bending
bead
line
long flange
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
Application number
JP61299695A
Other languages
Japanese (ja)
Other versions
JPS63154216A (en
Inventor
至 三輪
Original Assignee
トヨタ自動車株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by トヨタ自動車株式会社 filed Critical トヨタ自動車株式会社
Priority to JP61299695A priority Critical patent/JPH0661581B2/en
Publication of JPS63154216A publication Critical patent/JPS63154216A/en
Publication of JPH0661581B2 publication Critical patent/JPH0661581B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はプレス成形による、曲線状の稜線を有する長フ
ランジ製品の製造方法に関するものである。
TECHNICAL FIELD The present invention relates to a method for producing a long flange product having a curved ridge line by press molding.
〔従来の技術〕[Conventional technology]
従来、例えば第11図に示すように金属等の平板素材1
3から長フランジ製品10を製造する場合、専らプレス
成形で行なわれていることは周知のとおりである。
Conventionally, for example, as shown in FIG. 11, a flat plate material 1 such as metal is used.
It is well known that when the long flange product 10 is manufactured from No. 3, it is exclusively performed by press molding.
ところで該図に示されている製品10、即ちフランジ部
16と基部17との交差部位の稜15が曲線状の長フラ
ンジ製品10を得るべく、平板素材13から一挙に目的
とする形状まで曲げ加工を施すと図中D,E,Eで示し
た部位が強く引張られて伸びるとともに、そこに割れ
(亀裂)が発生することが多い。そこで従来はそのよう
な割れの発生を防ぐために、絞り工程抜き工程曲
げ工程の3工程を要するプレス成形が行なわれていた。
By the way, in order to obtain the product 10 shown in the figure, that is, the long flange product 10 in which the ridge 15 at the intersection of the flange portion 16 and the base portion 17 has a curved shape, the flat plate material 13 is bent to a desired shape all at once. When applied, the portions indicated by D, E, E in the drawing are strongly stretched and extended, and cracks often occur there. Therefore, conventionally, in order to prevent the occurrence of such cracking, press molding has been performed which requires three steps of a drawing step, a drawing step and a bending step.
即ち、第6図に示すように、ダイス20、クッション
21、ポンチ22からなる絞り加工装置を用いて素材1
3を予備成形して第5図に示される絞り加工物12とし
た後、第8図に示すように切刃9を備えた抜き加工装
置により所定寸法にトリミングを行ない、第9図に示す
ような抜き加工物11にする。該図中、実線と二点鎖線
の間(19)はスクラップ19(第8図)として除去された
部分を示す。次いで第10図に示すように曲刃7を備
えた曲げ加工装置や特開昭60-25303号に開示されている
ようなプレス加工装置を用いて成形加工することによ
り、第9図の実線で示される目的製品(長フランジ製
品)10を製造していた。なお前出の第6図、第8図及
び第10図の加工方法を示す断面図は其れ其れ第5図、
第7図及び第9図のVI−VI線、VIII−VIII線及びX−X
線断面部の加工を示す図である。
That is, as shown in FIG. 6, the raw material 1 is formed by using a drawing device including a die 20, a cushion 21 and a punch 22.
3 is preformed into a drawn product 12 shown in FIG. 5, and then trimmed to a predetermined size by a punching device having a cutting edge 9 as shown in FIG. The processed product 11 is used. In the figure, a portion (19) between the solid line and the chain double-dashed line shows a portion removed as the scrap 19 (FIG. 8). Then, as shown in FIG. 10, a bending apparatus having a curved blade 7 and a press working apparatus as disclosed in Japanese Patent Laid-Open No. 60-25303 are used to perform the forming process. The target product (long flange product) 10 shown was being manufactured. Incidentally, the cross-sectional views showing the processing method shown in FIGS. 6, 8 and 10 are the corresponding FIG.
VI-VI line, VIII-VIII line and XX in FIGS. 7 and 9
It is a figure showing processing of a line section.
〔発明が解決しようとする問題点〕[Problems to be solved by the invention]
このように曲線状の稜線を有する長フランジ製品をプレ
ス成形で製造することは、絞り工程、抜き工程、曲げ工
程の多段工程が必要であったため、繁雑作業を強いられ
るとともに生産性も悪いという問題があった。
Manufacturing a long-flange product having a curved ridgeline by press molding requires a multi-step process of drawing, punching, and bending, which complicates the work and reduces productivity. was there.
また絞り加工で引張られて発生した被加工物の歪み変形
部が次の加工の際に製品壁部の他の位置に移動すること
によって起こるショックライン18(第9図)がフラン
ジ部16に残るという問題もあった。
Further, a shock line 18 (FIG. 9), which is generated when the strained and deformed portion of the work piece generated by the drawing work moves to another position of the product wall portion in the next work, remains in the flange portion 16. There was also a problem.
その上、絞り工程における素材の流入状態のバラツキを
考えると必要最小の素材寸法を設定するのが困難であっ
た。
In addition, it is difficult to set the minimum required material size in consideration of the variation in the inflow state of the material in the drawing process.
本発明は上記の問題を解決するためになされたもので、
その目的とするところは曲線状の稜を有する長フランジ
製品、即ちフランジ部又は隣接する基部が曲面状である
長フランジ製品を、短工程で生産性良く且つ品質精度を
高めて歩留り良く製造するための方法を提供することで
ある。
The present invention has been made to solve the above problems,
The purpose is to manufacture long flange products with curved edges, that is, long flange products in which the flange part or the adjacent base part is curved, with high productivity and quality accuracy in a short process with good yield. Is to provide a method.
〔問題点を解決するための手段〕[Means for solving problems]
そのため、本発明の長フランジ製品の製造方法は、プレ
ス成形により曲線状の稜線を有する長フランジ製品を製
造する方法であって、抜き加工を行うとともに、曲線状
の稜線の端部に相当する素材部位に予めビードを形成
し、そしてフランジ部を曲げ加工することからなること
を特徴とする。
Therefore, the manufacturing method of the long flange product of the present invention is a method of manufacturing a long flange product having a curved ridge line by press molding, and performing punching, and a material corresponding to the end of the curved ridge line. It is characterized in that a bead is formed in advance on the part and the flange part is bent.
〔作用〕[Action]
曲線状の稜線を有する長フランジ製品を平板素材からプ
レス成形する際には、該稜線の端部に相当する素材部位
に引張り応力が加わるが、本発明において、かかる部位
に予めビードが形成されているため、曲げ加工時に該ビ
ードが伸び、引張り応力が緩和され、しかも、該部位に
集中する曲げ歪みが分散され、割れの発生を抑えること
ができる。
When press-molding a long flange product having a curved ridge line from a flat plate material, a tensile stress is applied to a material part corresponding to the end of the ridge line, but in the present invention, a bead is formed in advance at such a part. Therefore, during the bending process, the bead is stretched, the tensile stress is relaxed, and the bending strain concentrated in the portion is dispersed, so that the occurrence of cracks can be suppressed.
そしてビード形成は抜き工程と同時に行われるため、従
来当該形状のプレス成形には不可欠だった絞り工程を不
要にできる。
Since the bead formation is performed at the same time as the drawing process, the drawing process which has been indispensable for press molding of the shape can be omitted.
また、上記の稜線端部に相当する部位の他に、曲げ加工
時に引張り応力が加わる素材の別の部位、例えばフラン
ジ先端に相当する部位等にもビードを予め形成してお
き、曲げ加工をさらに容易にすることもできる。
Further, in addition to the portion corresponding to the above-mentioned ridge line end portion, a bead is previously formed on another portion of the material to which tensile stress is applied during bending, for example, a portion corresponding to the tip of the flange, and the bending is further performed. It can also be made easier.
〔実施例〕〔Example〕
以下に本発明の長フランジ製品の製造方法の一実施例を
図面を用いながら説明する。
An embodiment of the method for producing a long flange product of the present invention will be described below with reference to the drawings.
本実施例は第3図に示すような、フランジ部16の根元
の稜線15が曲率半径Rの弧を描いた形状の長フランジ
製品10を製造しようとするものである。
This embodiment is intended to manufacture a long flange product 10 having a shape in which the ridge line 15 at the base of the flange portion 16 draws an arc having a radius of curvature R as shown in FIG.
ここでは従来行なわれていた、いわゆる絞り工程が無
い。即ち、まず平板素材から第1図(a)に示すようなビ
ード1,2が形成されたビード加工物14を製作し、点
線のところで切断して周縁部(スクラップ)19をトリ
ミングする。このビード形成とトリミングは抜き工程内
で一挙に行なう。その加工方法を示している第2図(第
1図のII−II線断面に相応する位置の加工を示す断面
図)に基づいて説明すると、抜き加工装置の上型パッド
4及び下型3には素材を挾持すると同時に加工物14に
所要形状のビードを形成できる型面を形設する。一方、
はらい用バネ8としてはビードを形成させるための所要
の反発力を発揮できるバネを用いる。こうしてなる装置
を用いて、平板素材の抜き加工を行なうと、上型切刃9
の降下によって第1図(a)の、ビード1,2を有し、且
つ周縁部(スクラップ)19が取り除かれたワーク23
が簡便に製作できる。該ワーク23を第1図(a)のB方
向からみた部分正面図及びC方向からみた部分側面図が
其々第1図(b)及び第1図(c)である。そこのL1、L2、l1
びl2は寸法を示している。
Here, there is no so-called squeezing step which has been conventionally performed. That is, first, a beaded product 14 having beads 1 and 2 as shown in FIG. 1A is manufactured from a flat plate material, cut at a dotted line, and a peripheral edge (scrap) 19 is trimmed. The bead formation and trimming are performed at once in the punching process. The process will be described with reference to FIG. 2 (a cross-sectional view showing a process at a position corresponding to a cross section taken along the line II-II in FIG. 1) showing the upper die pad 4 and the lower die 3 of the punching device. Holds the material and at the same time forms a mold surface capable of forming a bead having a desired shape on the workpiece 14. on the other hand,
A spring capable of exerting a repulsive force required to form a bead is used as the spring 8 for flare. When the flat plate material is punched using the apparatus thus configured, the upper die cutting blade 9
The work 23 having the beads 1 and 2 and the peripheral portion (scrap) 19 removed from the work 23 of FIG.
Can be easily manufactured. FIG. 1 (b) and FIG. 1 (c) are a partial front view and a partial side view, respectively, of the work 23 viewed from the direction B in FIG. 1 (a). L 1 , L 2 , l 1 and l 2 there indicate dimensions.
次に第3図に示すように、曲率半径Rの湾曲状で幅がH
のフランジ部16ができるように曲げ加工を行なう。図
中の破線は曲げ加工をされる前の形状を示し、矢印は曲
げられた方向を示す。即ち第4図に示すように被加工物
11を上型パッド5と下型ポンチ6で挾んだ後、上型曲
刃7を下降させて行う。この時フランジ先端部D(第3
図)にはH/(R−H)×100〔%〕の伸びが発生する
(完全に稜線の法線方向の曲げが成立した場合)。しか
しながらフランジ先端部Dとなるべき部位に形成されて
いたビード2の効果、即ち第1図(b)から判るように、L
2−L1分だけ予め伸ばしておいたことにより、曲げ加工
が容易である。またL2−L1のみでフランジ伸び分を吸収
しきれない場合、第3図中E,Eで示した部位に伸び及
び割れが発生するところであるが、第1図(a)及び(c)に
示すように被加工材にビード1を形成させてl2−l1だけ
伸ばしておいたことにより、割れを発生することなく曲
げ加工を施すことができる。
Next, as shown in FIG. 3, a curved shape having a radius of curvature R and a width of H
Bending is performed so that the flange portion 16 is formed. The broken line in the figure shows the shape before bending, and the arrow shows the bending direction. That is, as shown in FIG. 4, the workpiece 11 is sandwiched between the upper die pad 5 and the lower die punch 6 and then the upper die blade 7 is lowered. At this time, the flange tip D (3rd
In the figure, an elongation of H / (RH) × 100 [%] occurs (when the bending in the normal direction of the ridge line is completely established). However, as can be seen from the effect of the bead 2 formed in the portion that should become the flange tip portion D, that is, as shown in FIG. 1 (b), L
Bending is easy because it is pre-stretched for 2 -L 1 minute. In the case that can not absorb the flange extends only minutes at L 2 -L 1, Figure 3 in E, but is where elongation and cracking occurs at the site indicated by E, FIG. 1 (a) and (c) By forming the bead 1 on the material to be processed and extending it by l 2 −l 1 as shown in FIG. 3, it is possible to perform bending without causing cracks.
(発明の効果) 本発明に係る曲線状の稜を有する長フランジ製品の製造
方法によれば以下のような効果を奏する。
(Effect of the Invention) According to the method for manufacturing a long flange product having a curved ridge according to the present invention, the following effects can be obtained.
まず抜き工程にてビードを形成させることにより、絞り
加工を要すことなく曲げ加工が可能となったため、プレ
ス成形の工程数が削減でき生産性が向上する。
First, by forming the beads in the punching process, the bending process can be performed without the need for drawing, so that the number of steps of press molding can be reduced and the productivity is improved.
また従来は絞り加工、曲げ加工の2工程でフランジ部が
成形されていたために、その境界部にショックラインが
残ったが、本発明方法では曲げ加工のみによるためショ
ックラインが残らず、製品の品質が向上する。
Further, in the past, since the flange portion was formed in two steps of drawing and bending, a shock line remained at the boundary, but in the method of the present invention, the shock line does not remain because it is only by bending, and the product quality Is improved.
その上、ビード成形を施すことにより、曲げ加工時のフ
ランジの伸びを減少でき、フランジの伸びに起因するス
プリングバックの変化量を減少することができて製品精
度を向上させることができる。
In addition, by performing bead molding, it is possible to reduce the elongation of the flange during bending, reduce the amount of change in springback due to the elongation of the flange, and improve the product accuracy.
更に、素材流入のバラツキを考えて大きめの素材を用い
なければならなかった絞り工程が不要となったことで、
必要最小限の寸法の素材ですむこととなり省資源化が図
れ、この点でも低コスト化に寄与する。
Furthermore, the drawing process, which had to use a large material in consideration of the variation in material inflow, is no longer necessary,
Since the material with the minimum required size is used, resource saving can be achieved, which also contributes to cost reduction.
【図面の簡単な説明】[Brief description of drawings]
第1図(a)は本発明方法の一実施例の途中で得られたビ
ード加工物を示す斜視図、 第1図(b)及び(c)はそれを点線の所でトリミングした後
の各々の部分寸法を示す図、 第2図はビード形成と抜き加工を同時に行う方法を示す
断面図、 第3図は曲げ加工におけるビードの効果の説明図、 第4図はその曲げ加工方法を示す断面図、 第5図は従来の絞り加工物を示す斜視図、 第6図はその加工方法を示す断面図、 第7図は従来の抜き加工物を示す斜視図、 第8図はその加工方法を示す断面図、 第9図は従来の曲げ加工方法により製造された長フラン
ジ製品を示す斜視図、 第10図はその加工方法を示す断面図、 第11図は曲線状の稜を有する長フランジ製品を製造す
る際の問題点の説明図である。 図中、 1,2……ビード、10……長フランジ製品 14……ビード加工物、15……稜線 16……フランジ部 23……ワーク(被曲げ加工材)
FIG. 1 (a) is a perspective view showing a bead processed product obtained in the middle of one embodiment of the method of the present invention, and FIGS. 1 (b) and (c) are views after trimming it at the dotted line. Fig. 2 is a sectional view showing a method of simultaneously performing bead formation and punching, Fig. 3 is an explanatory view of an effect of a bead in bending work, and Fig. 4 is a sectional view showing the bending process. Fig. 5, Fig. 5 is a perspective view showing a conventional drawn product, Fig. 6 is a sectional view showing a working method thereof, Fig. 7 is a perspective view showing a conventional punched product, and Fig. 8 is a working method thereof. FIG. 9 is a sectional view showing a long flange product manufactured by a conventional bending method, FIG. 10 is a sectional view showing the processing method, and FIG. 11 is a long flange product having a curved ridge. FIG. 6 is an explanatory view of problems in manufacturing the. In the figure, 1, 2 ... bead, 10 ... long flange product 14 ... bead work product, 15 ... ridge line 16 ... flange part 23 ... work (workpiece to be bent)

Claims (1)

    【特許請求の範囲】[Claims]
  1. 【請求項1】プレス成形により曲線状の稜線を有する長
    フランジ製品を製造する方法であって、抜き加工を行う
    とともに、曲線状の稜線の端部に相当する素材部位に予
    めビードを形成し、そしてフランジ部を曲げ加工するこ
    とからなるなることを特徴とする長フランジ製品の製造
    方法。
    1. A method for producing a long-flange product having a curved ridge line by press molding, which comprises punching and forming a bead in advance on a material portion corresponding to an end of the curved ridge line. A method of manufacturing a long flange product, which comprises bending the flange portion.
JP61299695A 1986-12-16 1986-12-16 Manufacturing method of long flange products Expired - Fee Related JPH0661581B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61299695A JPH0661581B2 (en) 1986-12-16 1986-12-16 Manufacturing method of long flange products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61299695A JPH0661581B2 (en) 1986-12-16 1986-12-16 Manufacturing method of long flange products

Publications (2)

Publication Number Publication Date
JPS63154216A JPS63154216A (en) 1988-06-27
JPH0661581B2 true JPH0661581B2 (en) 1994-08-17

Family

ID=17875846

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61299695A Expired - Fee Related JPH0661581B2 (en) 1986-12-16 1986-12-16 Manufacturing method of long flange products

Country Status (1)

Country Link
JP (1) JPH0661581B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010131640A (en) * 2008-12-05 2010-06-17 Toyota Auto Body Co Ltd Compact having deformed u-shaped part, and method for manufacturing the same
JP2011020149A (en) * 2009-07-16 2011-02-03 Toyota Auto Body Co Ltd Method for manufacturing formed body having closed section shape including dissimilar u-shaped part

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2567106B2 (en) * 1989-08-25 1996-12-25 日産自動車株式会社 Front fender flange forming method
CA2685334C (en) * 2009-10-30 2013-03-12 Honda Motor Co., Ltd. Scrap shape retention
JP5983585B2 (en) * 2013-11-26 2016-08-31 Jfeスチール株式会社 Press forming method
JP6202059B2 (en) * 2014-11-20 2017-09-27 Jfeスチール株式会社 Press forming method
CN110918733B (en) * 2019-12-12 2021-05-28 奇瑞汽车股份有限公司 Stamping part straight flanging processing method and processing equipment for overcoming straight flanging rebound

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0237248B2 (en) * 1981-12-05 1990-08-23 Toyota Motor Co Ltd

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010131640A (en) * 2008-12-05 2010-06-17 Toyota Auto Body Co Ltd Compact having deformed u-shaped part, and method for manufacturing the same
JP2011020149A (en) * 2009-07-16 2011-02-03 Toyota Auto Body Co Ltd Method for manufacturing formed body having closed section shape including dissimilar u-shaped part

Also Published As

Publication number Publication date
JPS63154216A (en) 1988-06-27

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