JPS63154216A - Manufacture of long flange product - Google Patents
Manufacture of long flange productInfo
- Publication number
- JPS63154216A JPS63154216A JP61299695A JP29969586A JPS63154216A JP S63154216 A JPS63154216 A JP S63154216A JP 61299695 A JP61299695 A JP 61299695A JP 29969586 A JP29969586 A JP 29969586A JP S63154216 A JPS63154216 A JP S63154216A
- Authority
- JP
- Japan
- Prior art keywords
- bead
- flange
- bending
- product
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000011324 bead Substances 0.000 claims abstract description 26
- 238000005452 bending Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 32
- 238000009966 trimming Methods 0.000 abstract description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 12
- 238000004080 punching Methods 0.000 description 11
- 238000003672 processing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000035939 shock Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
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。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a long flange product having a curved ridge line by press molding.
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、専ちプレス
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.
It is well known that when the long flange product 10 is manufactured from 3, press molding is used exclusively.
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り、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０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 is curved, the flat plate material 13 is bent at once to the desired shape. When this process is applied, the parts indicated by E, E, and E in the figure are strongly stretched and stretched, and cracks appear there (
Cracks) often occur. Conventionally, in order to prevent such cracks from occurring, press forming has been carried out which requires three steps: (1) a drawing process (2) a punching process (2) a punching process and a bending process.
即ち、■第６図に示すように、ダイス２０、クッシ冒ン
２１、ポンチ２２からなる絞シ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１−２５３０３号に開示
されているようなブ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■−■線、■−■線及びＸ−
Ｘ線断面部の加工を示す図である。Namely, as shown in FIG. 6, the material 1 is
After preforming 3 to obtain the drawing workpiece 12 shown in FIG. 5, it is trimmed to a predetermined size using a punching device equipped with a cutting blade 9 as shown in FIG. A punched workpiece 11 is made. In the figure, the portion (19) between the solid line and the two-dot chain line indicates the portion removed as scrap 19 (FIG. 8). Next, as shown in Fig. 10, curved blade 7
The target product (long flange product) 10 shown by the solid line in FIG. was manufacturing. The cross-sectional views showing the processing method shown in FIGS. 6, 8, and 10 are the lines ■-■, ■-■, and X in FIGS. 5, 7, and 9, respectively. −
FIG. 3 is a diagram showing processing of an X-ray cross section.
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 long flange products with curved ridge lines by press forming requires a multi-stage drawing process, punching process, and bending process, resulting in complicated work and poor productivity. was there.
また絞υ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。In addition, a shock line 18 (Fig. 9) is formed on the flange portion 16 when the strained and deformed portion of the workpiece that is pulled during the drawing process moves to another position on the product wall during the next process. There was also the problem of remaining.
、その上、絞シ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。Moreover, it has been difficult to set the minimum required size of the material considering the variation in the inflow state of the material during 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 was made to solve the above problems,
The purpose is to manufacture long flange products with curved edges, that is, long flange products whose flange portion or adjacent base is curved, in a short process, with high productivity, and with high quality accuracy and high yield. The purpose is to provide a method for
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を有する長フランジ製品を製造
する方法において、曲げ加工時に被加工物の引張り応力
がかかる部位に抜工程において予めビードを形成させて
おくことを特徴とする。Therefore, in the method of manufacturing a long flange product of the present invention, in a method of manufacturing a long flange product having a curved edge by press forming, a bead is placed in advance in the punching process at the part of the workpiece that is subjected to tensile stress during bending. It is characterized by being allowed to form.
被加工物の引張応力がかかる部位にビードを形成させて
おくと、曲げ加工時に伸びが必要とされる部位に該ビー
ドが吸収されるために無理な引伸ばしが起こらず、割れ
の発生を押えることができる。If a bead is formed in the part of the workpiece that is subject to tensile stress, the bead will be absorbed by the part where elongation is required during bending, preventing unreasonable elongation and preventing cracks from occurring. be able to.
そして抜き加工と同時にビード形成ができるため、絞り
工程を不要にできる。Since the bead can be formed at the same time as the punching process, the drawing process can be made unnecessary.
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 manufacturing 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, as shown in FIG. 3, in which the ridge line 15 at the base of the flange portion 16 is shaped like an arc with a radius of curvature R.
ここでは従来性なわれていた、いわゆる絞シ工程が無い
。即ち、まず平板素材から第１図（ａｌ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。Here, there is no conventional drawing process. That is, first, a bead workpiece 14 on which beads 1 and 2 are formed as shown in FIG. 1 (al) is manufactured from a flat plate material, and is cut along the dotted line to trim the peripheral edge (scrap) 19.
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■−■
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が簡便に競作
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
ｆｂｌ及び第１図（ｃｌである。そこのＬｌ、Ｌｌ、１
．及びムは寸法を示している。This bead formation and trimming are performed all at once during the punching process. Figure 2 shows the processing method (■-■ in Figure 1)
(Cross-sectional view showing machining at a position corresponding to the line cross section), the upper die pad 4 and the lower die 3 of the punching device include dies that can hold the material and at the same time form a bead of a desired shape on the workpiece 14. Shape the surface. On the other hand, spring 8
A spring capable of exerting the necessary repulsive force to form a bead is used. When a flat plate material is punched using such a device, the lowering of the upper die cutting blade 9 results in the bead 1.2 shown in FIG. 1(a) and the peripheral edge (scrap) 19 being removed. The work 23 can be easily and competitively produced. A partial front view and a partial side view of the workpiece 23 viewed from direction B and direction C in FIG. 1(a) are respectively FIG. 1fbl and FIG. 1(cl).
．． and mm 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−Ｔ（）ｘｌ ｏ［］ （チ〕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りとなるべき部位に
形成されていたビード２の効果、即ち第１図（ｔｌから
判るように、Ｌ２− Ｉ、、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。壕だＬｘ−Ｌ＋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（ｃｌに示すように被加工材に
ビード１を形成させてｔ２−ムだけ伸ばしておいたこと
により、割れを発生することな（曲げ加工を施すことが
できる。Next, as shown in Figure 3, it has a curved shape with a radius of curvature R and a width H.
The bending process is performed so that the flange portion 16 is formed. The broken line in the figure shows the shape before being bent, and the arrow shows the direction of bending. That is, as shown in FIG. 4, after the workpiece 11 is sandwiched between the upper die pad 5 and the lower die punch 6, the upper die curved blade 7 is lowered. At this time, the flange tip D (third
In the figure), an elongation of H/(R-T()xl o[] As can be seen from Figure 1 (tl), the effect of the bead 2 that had been formed, that is, the bending process is easy because it has been stretched in advance by L2-I. If the elongation cannot be absorbed, E in Figure 3
, Elongation and cracking occur in the area shown by E, but as shown in Fig. 1(a) and (cl), bead 1 is formed on the workpiece material and it is stretched by t2-m. , can be bent 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。(Effects of the Invention) The method for manufacturing a long flange product having a curved edge according to the present invention provides the following effects.
まず抜き工程にてビードを形成させることによシ、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っ
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。First, by forming beads in the punching process, bending is possible without the need for drawing, which reduces the number of press forming processes and improves productivity. Since the flange part was formed in two processing steps, shock lines remained at the boundary, but in the method of the present invention, only bending is performed, so no shock lines remain, improving the quality of the product.
その上、ビード成形を施すことにより、曲げ加工時の７
ランジの伸びを減少でき、７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。Furthermore, by applying bead forming, the
The elongation of the lunge can be reduced, and the amount of change in springback caused by the elongation of the seven lunges can be reduced, thereby improving 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シ省資源化が図
れ、この点でも低コスト化に寄与する。Furthermore, the drawing process, which required using larger materials due to variations in material inflow, is no longer necessary.
By using materials with the minimum necessary dimensions, it is possible to conserve resources, which also contributes to cost reduction.
第１図（ａｌ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（ｂｌ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シ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）
牙１図 才２図Fig. 1 (al is a perspective view showing a bead processed product obtained in the middle of one embodiment of the method of the present invention, Fig. 1 (bl and (c) are respective parts after trimming it at the dotted line) A diagram showing the dimensions, Figure 2 is a cross-sectional view showing a method of performing bead formation and punching at the same time, Figure 3 is an explanatory diagram of the effect of the bead in bending, and Figure 4 is a cross-sectional view showing the bending method. Fig. 5 is a perspective view showing a conventional drawing workpiece, Fig. 6 is a cross-sectional view showing the processing method, Fig. 7 is a perspective view showing a conventional punching workpiece, and Fig. 8 is a cross-section showing the processing method. Figure 9 is a perspective view showing a long flange product manufactured by a conventional bending method, Figure 10 is a sectional view showing the processing method, and Figure 11 is a long flange product with a curved edge. It is an explanatory diagram of problems when manufacturing. In the figure, 1.2... Bead 10... Long flange product 14
...Bead workpiece 15...Ridge line 16...Flange portion 23...Work (material to be bent) Fang 1 Fig. 2 Fig.
Claims (1)
製造する方法において、曲げ加工時に被加工物の引張り
応力がかかる部位に予めビードを形成させておくことを
特徴とする長フランジ製品の製造方法。A method of manufacturing a long flange product having a curved edge by press forming, the method comprising forming a bead in advance at a portion of a workpiece to which tensile stress is applied during bending.
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 true JPS63154216A (en) | 1988-06-27 |
| JPH0661581B2 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 (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0381021A (en) * | 1989-08-25 | 1991-04-05 | Nissan Motor Co Ltd | Method for forming flange for front fender |
| JP2013508170A (en) * | 2009-10-30 | 2013-03-07 | 本田技研工業株式会社 | Scrap shape retention |
| JP2015100812A (en) * | 2013-11-26 | 2015-06-04 | Ｊｆｅスチール株式会社 | Press forming method |
| JP2016104492A (en) * | 2014-11-20 | 2016-06-09 | Ｊｆｅスチール株式会社 | Press molding method |
| CN109226491A (en) * | 2018-10-17 | 2019-01-18 | 浙江长华汽车零部件股份有限公司 | Efficient stamping parts flange apparatus for turning |
| CN110918733A (en) * | 2019-12-12 | 2020-03-27 | 奇瑞汽车股份有限公司 | Stamping part straight flanging processing method and processing equipment for overcoming straight flanging rebound |
| JP2020049494A (en) * | 2018-09-25 | 2020-04-02 | 日本製鉄株式会社 | Press molded component manufacturing method, and press molded component |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5077211B2 (en) * | 2008-12-05 | 2012-11-21 | トヨタ車体株式会社 | Molded body having odd-shaped U-shaped portion and manufacturing method thereof |
| JP5263046B2 (en) * | 2009-07-16 | 2013-08-14 | トヨタ車体株式会社 | Method for manufacturing a molded body having a closed cross-sectional shape including a modified U-shaped portion |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5897428A (en) * | 1981-12-05 | 1983-06-09 | Toyota Motor Corp | Press working method |
-
1986
- 1986-12-16 JP JP61299695A patent/JPH0661581B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5897428A (en) * | 1981-12-05 | 1983-06-09 | Toyota Motor Corp | Press working method |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0381021A (en) * | 1989-08-25 | 1991-04-05 | Nissan Motor Co Ltd | Method for forming flange for front fender |
| JP2013508170A (en) * | 2009-10-30 | 2013-03-07 | 本田技研工業株式会社 | Scrap shape retention |
| US9415433B2 (en) | 2009-10-30 | 2016-08-16 | Honda Motor Co., Ltd. | Scrap shape retention |
| JP2015100812A (en) * | 2013-11-26 | 2015-06-04 | Ｊｆｅスチール株式会社 | Press forming method |
| WO2015079794A1 (en) * | 2013-11-26 | 2015-06-04 | Ｊｆｅスチール株式会社 | Press forming method |
| JP2016104492A (en) * | 2014-11-20 | 2016-06-09 | Ｊｆｅスチール株式会社 | Press molding method |
| JP2020049494A (en) * | 2018-09-25 | 2020-04-02 | 日本製鉄株式会社 | Press molded component manufacturing method, and press molded component |
| CN109226491A (en) * | 2018-10-17 | 2019-01-18 | 浙江长华汽车零部件股份有限公司 | Efficient stamping parts flange apparatus for turning |
| CN109226491B (en) * | 2018-10-17 | 2024-04-09 | 长华控股集团股份有限公司 | Forming method utilizing efficient stamping part flanging turnover device |
| CN110918733A (en) * | 2019-12-12 | 2020-03-27 | 奇瑞汽车股份有限公司 | Stamping part straight flanging processing method and processing equipment for overcoming straight flanging rebound |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0661581B2 (en) | 1994-08-17 |
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