JPH09122763A - Bending device - Google Patents

Bending device

Info

Publication number
JPH09122763A
JPH09122763A JP28542595A JP28542595A JPH09122763A JP H09122763 A JPH09122763 A JP H09122763A JP 28542595 A JP28542595 A JP 28542595A JP 28542595 A JP28542595 A JP 28542595A JP H09122763 A JPH09122763 A JP H09122763A
Authority
JP
Japan
Prior art keywords
cylinders
holder
pressing
holders
cylinder
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
Application number
JP28542595A
Other languages
Japanese (ja)
Other versions
JP3058819B2 (en
Inventor
Hajime Kuga
始 久我
Masatoshi Suzuki
正敏 鈴木
Naoto Ido
直人 井戸
Katsumori Yukinouchi
克守 行之内
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kinugawa Rubber Industrial Co Ltd
Original Assignee
Kinugawa Rubber Industrial Co Ltd
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 Kinugawa Rubber Industrial Co Ltd filed Critical Kinugawa Rubber Industrial Co Ltd
Priority to JP7285425A priority Critical patent/JP3058819B2/en
Publication of JPH09122763A publication Critical patent/JPH09122763A/en
Application granted granted Critical
Publication of JP3058819B2 publication Critical patent/JP3058819B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

PROBLEM TO BE SOLVED: To improve the quality of formed products by locally allowing not to concentrate a pressing load due to cylinders on dies and causing no cross sectional distortion and wrinkle. SOLUTION: Plural moving cylinders 1 and receiving cylinders 2 are laterally juxtaposed in a row with both cylinders opposed each other. Holders 25 are attached to the end of respective cylinders 1 and 2, and flexible upper dies 33 and lower dies 34 are held by plural holders 25 in the side of moving cylinders 1 and plural holders 25 in the side of receiving cylinders 2, respectively. A long size work is bent together with dies 33 and 34 by suitably controlling the stroke of respective cylinders 1 and 2 under the condition that the long size work is held with upper dies 33 and lower dies 34. Pressing surfaces 31 of respective holders 25 are approximately formed into the curvature along the last bending shape of the long size work.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、芯金を有する自動
車のグラスランや、自動車のドアパネル内に配設される
ロアサッシュ等を長手方向に沿って曲げ形成するのに用
いられるベンディング装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending device used for bending a glass run of an automobile having a core metal, a lower sash arranged in a door panel of the automobile, etc. along a longitudinal direction.

【0002】[0002]

【従来の技術】この種のベンディング装置として、従
来、特開平6−226357号公報に示されるようなも
のが案出されている。
2. Description of the Related Art As a bending device of this type, a device disclosed in Japanese Patent Application Laid-Open No. 6-226357 has been proposed.

【0003】このベンディング装置は、予め所定の断面
形状に形成した長尺ワークに対して長手方向の曲げ加工
を行うもので、図10〜図12に示すように、下向きに
横一列に並設された複数の可動シリンダ1に対向して、
この各可動シリンダ1の伸張動に伴って後退動する複数
の受動シリンダ2が同様に横一列に並設され、各可動シ
リンダ1と受動シリンダ2の先端にホルダ3が取り付け
られると共に、可動シリンダ1側の複数のホルダ3と、
受動シリンダ2側の複数のホルダ3とに、柔軟性を有す
る合成樹脂製の押さえ型4,5が夫々保持されている。
そして、これらの一対の押さえ型4,5の間には成形時
に長尺ワークがセットされ、この状態で各可動シリンダ
1と受動シリンダ2のストローク量とストローク速度を
適宜制御することにより、柔軟性を有する両型4,5を
通して長尺ワークを所定形状に連続的に曲げるようにな
っている。
This bending apparatus is for bending a long work formed in advance to have a predetermined cross-sectional shape in the longitudinal direction, and as shown in FIGS. Facing the plurality of movable cylinders 1,
A plurality of passive cylinders 2 that move backward with the extension of the movable cylinders 1 are also arranged side by side in the same manner, and holders 3 are attached to the tips of the movable cylinders 1 and the passive cylinders 2 as well as the movable cylinders 1. A plurality of holders 3 on the side,
Flexible holders 4 and 5 made of synthetic resin are respectively held by a plurality of holders 3 on the side of the passive cylinder 2.
A long work is set between the pair of pressing dies 4 and 5 at the time of molding, and in this state, the stroke amount and the stroke speed of each movable cylinder 1 and the passive cylinder 2 are appropriately controlled, thereby providing flexibility. The long workpiece is continuously bent into a predetermined shape through both molds 4 and 5 having the shape.

【0004】また、このベンディング装置の各ホルダ3
は、図11,図12に詳細に示すように、各シリンダ
1,2の先端に結合された断面コ字状のブラケット6
に、型押圧部たるローラ7が回転可能に保持され、この
ローラ7の両端にガイドフランジ8が結合された概略構
成となっており、ローラ7は、ワークの曲げに伴った各
型4,5の曲げ変形時に適宜回転して各型4,5の形状
変化に円滑に追従し、両側のガイドフランジ8は各型
4,5の側方のずれを阻止するようになっている。尚、
中央部のシリンダ1,2に取り付けられるホルダ3には
図外のクランプ手段が設けられ、各型4,5の略中央部
がこのクランプ手段を介して中央部のホルダ3に固定さ
れている。
Further, each holder 3 of this bending device
As shown in detail in FIGS. 11 and 12, the bracket 6 having a U-shaped cross-section coupled to the tips of the cylinders 1 and 2.
In addition, a roller 7 as a die pressing portion is rotatably held, and guide flanges 8 are coupled to both ends of the roller 7, and the roller 7 has the respective die 4, 5 according to the bending of the work. When it is bent and deformed, it appropriately rotates to smoothly follow the shape changes of the respective molds 4 and 5, and the guide flanges 8 on both sides prevent lateral displacement of the respective molds 4 and 5. still,
Clamping means (not shown) is provided on the holder 3 attached to the central cylinders 1 and 2, and substantially central portions of the respective molds 4 and 5 are fixed to the central holder 3 via the clamping means.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、上記従
来のベンディング装置においては、可動シリンダ1側、
受動シリンダ2側の各ホルダ3の型押圧部が円筒状のロ
ーラ7によって構成されているため、各型4,5に対す
るシリンダ1,2による押付荷重が局部的に集中し、成
形品に、この荷重集中に起因した断面歪みや皺、折れ線
等の望ましくない変形が生じ易い。特に、同一の型4,
5が繰り返し使用された場合には、その型4,5の荷重
集中部に変形を来し、成形品にとって望ましくない上記
のような変形がより助長され易い。
However, in the above conventional bending device, the movable cylinder 1 side,
Since the die pressing portion of each holder 3 on the side of the passive cylinder 2 is constituted by the cylindrical roller 7, the pressing load by the cylinders 1 and 2 on each die 4 and 5 is locally concentrated, and this is Undesirable deformation such as cross-sectional distortion, wrinkles, and broken lines due to load concentration is likely to occur. In particular, the same mold 4,
When 5 is repeatedly used, the load concentrating portions of the molds 4 and 5 are deformed, and the above-mentioned deformation, which is not desirable for the molded product, is more likely to be promoted.

【0006】そこで本発明は、シリンダによる押付荷重
が押さえ型上に局部的に集中することのないようにし
て、品質の高い成形品を製造することのできるベンディ
ング装置を提供しようとするものである。
Therefore, the present invention is intended to provide a bending apparatus capable of producing a molded product of high quality by preventing the pressing load of the cylinder from being locally concentrated on the pressing die. .

【0007】[0007]

【課題を解決するための手段】本発明は上述した課題を
解決するための手段として、横一列に並設された複数の
可動シリンダと、これらの可動シリンダに対向して横一
列に並設され、可動シリンダの伸張動に伴って後退動す
る複数の受動シリンダと、前記各シリンダの先端に取り
付けられたホルダと、前記可動シリンダ側の複数のホル
ダと、前記受動シリンダ側の複数のホルダとに夫々保持
された柔軟性を有する一対の押さえ型とを備え、前記各
シリンダのストロークを制御することにより、前記一対
の押さえ型で挟持した長尺ワークを長手方向に曲げ形成
するベンディング装置において、前記各ホルダの押さえ
型に対する押圧部を、長尺ワークの最終曲げ形状に略沿
う曲面形状に形成し、長尺ワークの曲げ加工時、特に大
きな押付荷重の加えられる曲げ加工終期に各ホルダが押
さえ型に対して面で接触するようにした。
As a means for solving the above-mentioned problems, the present invention provides a plurality of movable cylinders arranged side by side in a row, and a plurality of movable cylinders arranged side by side in opposition to these movable cylinders. A plurality of passive cylinders that move backward with the extension of the movable cylinders, a holder attached to the tip of each cylinder, a plurality of holders on the movable cylinder side, and a plurality of holders on the passive cylinder side. A bending device that includes a pair of pressing dies each having a held flexibility, and controls a stroke of each of the cylinders to bend and form a long work sandwiched by the pair of pressing dies in the longitudinal direction. The pressing portion of each holder against the pressing die is formed into a curved surface shape that substantially conforms to the final bending shape of the long workpiece, and a particularly large pressing load is applied when bending the long workpiece. Each holder bending end is was in contact with a surface relative to the pressing mold.

【0008】また、前記ホルダの押圧部に、長尺ワーク
と前記各型に捩れ方向の荷重を付与するワーク幅方向の
傾斜を適宜設けるようにした。
Further, the pressing portion of the holder is appropriately provided with an inclination in the work width direction for applying a load in the twisting direction to the long work and each die.

【0009】[0009]

【発明の実施の形態】次に、本発明の実施の形態を図1
〜図9に基づいて説明する。尚、図10以下の図面に示
した従来のものと同一部分には同一符号を用いるものと
する。
FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. The same reference numerals are used for the same parts as those of the conventional one shown in FIG. 10 and subsequent drawings.

【0010】まず、図1〜図6に基づき本発明の一つの
実施の形態について説明する。
First, one embodiment of the present invention will be described with reference to FIGS.

【0011】図1は、本発明にかかるベンディング装置
の概略構成を示すもので、このベンディング装置は、図
2,図3に示すような自動車のサイドドア11のグラス
ラン12を車体の側面形状に沿わせるように曲げ加工す
るのに用いられる。
FIG. 1 shows a schematic structure of a bending apparatus according to the present invention. In this bending apparatus, a grass run 12 of a side door 11 of an automobile as shown in FIGS. It is used for bending so that it can be bent.

【0012】この図2,図3に示すグラスラン12は、
ドアガラス13の側縁部をガイドするグラスラン本体部
14と、ドア本体15のフランジ部15aに装着される
ウエルト部16とを備え、これらの両部14,16に亙
る形状の芯金17がゴム材料18の内部に埋設されてい
る。芯金17は、具体的には、グラスラン本体部14に
埋設される大きなコ字状断面部分と、ウエルト部16に
埋設される小さなコ字状断面部分とがS字状に連結され
た断面形状となっており、その芯金17は、ゴム材料1
8の押出しの前の段階で予めこのような断面形状に形成
され、押出成形時に、口金からゴム材料18と同時に押
し出されることによりゴム材料18の内部に埋設され
る。尚、この実施の形態の説明においては、このように
して押出成形されたものを以下長尺ワーク12と呼ぶも
のとする。
The grass run 12 shown in FIGS. 2 and 3 is
A glass run body portion 14 for guiding the side edge portion of the door glass 13 and a welt portion 16 mounted on the flange portion 15a of the door body 15 are provided. It is embedded inside the material 18. Specifically, the core metal 17 has a cross-sectional shape in which a large U-shaped cross-section portion embedded in the grass run main body portion 14 and a small U-shaped cross-section portion embedded in the welt portion 16 are connected in an S-shape. The core metal 17 is made of rubber material 1
8 is formed into such a cross-sectional shape in advance before extrusion, and is embedded in the rubber material 18 by being extruded simultaneously with the rubber material 18 from the die during extrusion molding. In the description of this embodiment, the extruded product thus obtained is hereinafter referred to as a long work 12.

【0013】図1において、1は、可動シリンダであ
り、2は、この可動シリンダ1の下方に配設された受動
シリンダ、21は、この受動シリンダ2のさらに下方に
配設されたストッパである。これらの可動シリンダ1、
受動シリンダ2及びストッパ21は夫々が複数個設けら
れ、3者1,2,21の対応するもの同士を上下方向で
整合させ、その状態においてこれら3者1,2,21の
夫々が横一列に並設されている。
In FIG. 1, reference numeral 1 is a movable cylinder, 2 is a passive cylinder disposed below the movable cylinder 1, and 21 is a stopper disposed further below the passive cylinder 2. . These movable cylinders 1,
A plurality of passive cylinders 2 and stoppers 21 are provided respectively, and the corresponding ones of the three persons 1, 2, 21 are vertically aligned, and in this state, these three persons 1, 2, 21 are arranged in a horizontal row. It is installed side by side.

【0014】前記各可動シリンダ1は下方に突出するピ
ストンロッド23が制御油圧によって伸縮動し、前記各
受動シリンダ2は上下に突出ピストンロッド24が制御
空気圧によって伸縮動するようになっており、これらの
各シリンダ1,2は、図外の制御機構によって夫々のス
トローク量とストローク速度を制御されるようになって
いる。尚、各受動シリンダ2は上方で対向する可動シリ
ンダ1の伸張動に伴って後退動するように制御される。
In each movable cylinder 1, a piston rod 23 projecting downward is expanded and contracted by control hydraulic pressure, and in each passive cylinder 2, a piston rod 24 projected vertically is expanded and contracted by control air pressure. Each of the cylinders 1 and 2 is controlled in stroke amount and stroke speed by a control mechanism (not shown). The respective passive cylinders 2 are controlled so as to move backward as the movable cylinders 1 facing each other extend upward.

【0015】前記ストッパ21は、ボルト状を呈し、ベ
ースプレート22にその軸部が螺合されると共に、軸部
の上端の頭部が対応する受動シリンダ2のピストンロッ
ド24の下端部に対して同軸上に指向している。そし
て、これらのストッパ21の上方側の突出量は、中央部
のストッパ21が最大に突出し、両端側に向かうに従っ
て順次段階的に突出が小さくなるように設定されてい
る。
The stopper 21 is in the shape of a bolt, the shaft of which is screwed into the base plate 22 and is coaxial with the lower end of the piston rod 24 of the passive cylinder 2 to which the head of the upper end of the shaft corresponds. Is oriented upwards. The amount of protrusion of these stoppers 21 on the upper side is set so that the stopper 21 in the central portion protrudes to the maximum, and the amount of protrusion gradually decreases toward both ends.

【0016】また、前記可動シリンダ1と受動シリンダ
2の互いに向き合う各ピストンロッド23,24の先端
部には、本発明の要部を成すホルダ25が夫々取り付け
られている。この各ホルダ25は、図4,図5に詳細に
示すように、各ピストンロッド23,24に螺子止めさ
れた断面コ字状のブラケット26と、このブラケット2
6の両側壁にシャフト27を介して回動可能に支持され
たホルダ本体部28とを備え、ホルダ本体部28は、三
角柱状の型押圧部材29の両側に夫々ガイドフランジ3
0が螺子結合された構造となっている。各型押圧部材2
9は、前記シャフト27に沿うその一面(シャフト27
の配置されるコーナと対面する辺)に、長尺ワーク12
の最終曲げ形状に略沿う曲率の凸形状または凹形状を持
った押圧面31が設けられている。具体的には、受動シ
リンダ側2(図中下側)のホルダ25の押圧面は凸形状
に、可動シリンダ側1(図中上側)のホルダ25の押圧
面は凹形状に形成されている。尚、図中32は、シャフ
ト27をブラケット26に固定するためのボルトを示
す。
A holder 25, which is an essential part of the present invention, is attached to the tip end portions of the piston rods 23 and 24 of the movable cylinder 1 and the passive cylinder 2 which face each other. As shown in detail in FIGS. 4 and 5, each holder 25 includes a bracket 26 having a U-shaped cross section, which is screwed to each piston rod 23, 24, and the bracket 2
6, a holder main body 28 rotatably supported via a shaft 27 is provided on both side walls of the holder 6, and the holder main body 28 is provided with guide flanges 3 on both sides of a triangular columnar mold pressing member 29.
It has a structure in which 0 is screwed. Each die pressing member 2
9 is one surface (shaft 27) along the shaft 27.
The long workpiece 12 on the side facing the corner where
The pressing surface 31 having a convex shape or a concave shape having a curvature that is substantially along the final bending shape is provided. Specifically, the pressing surface of the holder 25 on the passive cylinder side 2 (lower side in the drawing) is formed in a convex shape, and the pressing surface of the holder 25 on the movable cylinder side 1 (upper side in the drawing) is formed in a concave shape. Reference numeral 32 in the drawing denotes a bolt for fixing the shaft 27 to the bracket 26.

【0017】さらに、可動シリンダ1側の複数のホルダ
25と受動シリンダ2側の複数のホルダ25には、長尺
ワーク12を抱持する押さえ型としての上型33と下型
34が夫々保持されている。この上型33と下型34
は、柔軟性を有する剛性樹脂によって形成され、ホルダ
25を通して可動シリンダ1と受動シリンダ2から曲げ
荷重が加えられると、ホルダ25の変位に追従して長手
方向に沿って柔軟に変形するようになっている。そし
て、これらの各型33,34は、各ホルダ25のガイド
フランジ30,30間に保持されるが、その長手方向の
中心部位は、中央に位置されている可動シリンダ1と受
動シリンダ2の各ホルダ25に対し締付けボルト等のク
ランプ手段(図示せず。)によって固定されている。ま
た、上型33と下型34の対向面には、図6に示すよう
にワーク保持溝35が形成され、長尺ワーク12の加工
時に、これらのワーク保持溝35内にワーク12が中子
36a,36bをあてがった状態で収容されるようにな
っている。尚、中子36a,36bは、各型33,34
と同様の柔軟性を有する剛性樹脂等によって形成されて
いる。
Further, a plurality of holders 25 on the movable cylinder 1 side and a plurality of holders 25 on the passive cylinder 2 side respectively hold an upper die 33 and a lower die 34 as pressing dies for holding the long work 12. ing. This upper mold 33 and lower mold 34
Are made of a rigid resin having flexibility, and when a bending load is applied from the movable cylinder 1 and the passive cylinder 2 through the holder 25, the holder 25 is deformed along the longitudinal direction following the displacement of the holder 25. ing. The respective molds 33 and 34 are held between the guide flanges 30 and 30 of the holders 25, and the central portions in the longitudinal direction thereof are the movable cylinder 1 and the passive cylinder 2 located at the center. It is fixed to the holder 25 by a clamping means (not shown) such as a tightening bolt. Further, as shown in FIG. 6, work holding grooves 35 are formed on the facing surfaces of the upper die 33 and the lower die 34, and when the long work 12 is processed, the work 12 is inserted into the work holding grooves 35. It is adapted to be accommodated in a state in which 36a and 36b are applied. In addition, the cores 36a and 36b are formed in the respective molds 33 and 34.
It is made of a rigid resin or the like having the same flexibility as.

【0018】以上の構成において、長尺ワーク12の曲
げ加工を行う場合には、すべての受動シリンダ2と可動
シリンダ1とを最大に上昇させ、上型33と下型34を
上下に開いた状態において、長尺ワーク12を中子36
a,36bと共に下型34の上面に載置し、この状態か
らすべての可動シリンダ2を同時に同量だけ下方にスト
ロークさせて、上型33と下型34とを均一な圧力で型
締めする。
In the above construction, when the long work 12 is bent, all the passive cylinders 2 and the movable cylinders 1 are lifted to the maximum and the upper die 33 and the lower die 34 are opened vertically. In the long work 12, the core 36
It is placed on the upper surface of the lower mold 34 together with a and 36b, and from this state, all the movable cylinders 2 are simultaneously stroked downward by the same amount, and the upper mold 33 and the lower mold 34 are clamped with a uniform pressure.

【0019】そして、この後上記の型締め状態のまま、
上下方向で対向する可動シリンダ1と受動シリンダ2と
を対にして、両端に配置されているシリンダの対1,2
から順次隣接するシリンダの対1,2を下方にストロー
クさせて行き、長尺ワーク12を両型33,34を通し
て所定の形状に湾曲させる。このとき、各シリンダ1,
2に取り付けられたホルダ25の型押圧部材29は、型
33,34と長尺ワーク12の変形に伴って適宜回動
し、それによって型押圧部材29の押圧面31が各型3
3,34の変形に対して円滑に追従する。そして、こう
してシリンダの対1,2を下方にストロークさせて行く
と、受動シリンダ2のピストンロッド24の下端がスト
ッパ21に当接し、このとき最も大きな押付荷重が各シ
リンダ1,2から型33,34、さらには長尺ワーク1
2へと加えられる。ここで、このベンディング装置にお
いては、可動シリンダ1側と受動シリンダ2側の各ホル
ダ25の押圧面31が長尺ワーク12の最終曲げ形状に
略沿う曲率の凸形状と凹形状とに形成されているため、
このときの大きな押付荷重は大きな接触面積をもって各
ホルダ25から型33,34へと入力され、各型33,
34や成形する長尺ワーク12には局部的な荷重集中が
生じることは無い。
Then, after this, with the mold clamped state,
The movable cylinder 1 and the passive cylinder 2 facing each other in the up-down direction are paired to form a pair of cylinders 1 and 2 arranged at both ends.
Then, the pair of adjacent cylinders 1 and 2 are sequentially stroked downward to bend the long work 12 into a predetermined shape through both molds 33 and 34. At this time, each cylinder 1,
The mold pressing member 29 of the holder 25 attached to the holder 2 is appropriately rotated with the deformation of the molds 33 and 34 and the long work 12, so that the pressing surface 31 of the mold pressing member 29 is moved to each mold 3.
It smoothly follows the deformation of 3,34. Then, when the pair of cylinders 1 and 2 are stroked downward in this way, the lower end of the piston rod 24 of the passive cylinder 2 contacts the stopper 21, and at this time, the largest pressing load is applied from each cylinder 1, 2 to the mold 33 ,. 34, and long work 1
Added to 2. Here, in this bending device, the pressing surfaces 31 of the holders 25 on the movable cylinder 1 side and the passive cylinder 2 side are formed in a convex shape and a concave shape having a curvature substantially along the final bending shape of the long work 12. Because
The large pressing load at this time is input from each holder 25 to the molds 33, 34 with a large contact area, and each mold 33, 34
There is no local concentration of load on 34 or the long work 12 to be formed.

【0020】このようにして長尺ワーク12に対する曲
げを完了すると、その後、すべての可動シリンダ1と受
動シリンダ2を再び最上昇させ、型開きされた下型34
上から加工を完了した長尺ワーク12(成形品)を取り
出して、このベンディング装置による作業を終了する。
When the bending of the long work 12 is completed in this manner, thereafter, all the movable cylinders 1 and the passive cylinders 2 are again raised to the maximum, and the lower mold 34 opened.
The long work 12 (molded product) from which the processing has been completed is taken out from above, and the work by this bending device is completed.

【0021】以上のようにこのベンディング装置におい
ては、曲げ加工時、特にその加工終期に押付荷重が大き
な接触面積でもって各ホルダ25から型33,34に入
力されるため、型33,34を繰り返し使用した場合で
あっても型33,34に変形を来すことがなく、したが
って、成形品に断面歪みや皺、折れ線等が発生するのを
確実に防止することができる。また、局部的な荷重集中
が生じないことから、ホルダ25の押圧部にローラを用
いた従来のものに比較して各シリンダの対1,2のスト
ローク速度をより速めることができ、生産効率を高める
ことが可能である。さらに、各ホルダ25の型押圧部材
29は全体を三角柱状に形成し、その三角の一つのコー
ナにシャフト27を配置すると共に、そのコーナの対面
の辺部分に押圧面31を配置するようにしてあるため、
型押圧部材29全体を大型化することなく、押圧面31
の曲率半径を充分に大きく設定できるという利点もあ
る。
As described above, in this bending apparatus, since the pressing load is inputted from the respective holders 25 to the molds 33 and 34 with a large contact area at the time of bending, particularly at the end of the bending, the molds 33 and 34 are repeated. Even if it is used, the molds 33 and 34 are not deformed, and therefore it is possible to reliably prevent the cross-section distortion, wrinkles, and broken lines from occurring in the molded product. Further, since local load concentration does not occur, it is possible to further increase the stroke speed of the pair 1 and 2 of each cylinder as compared with the conventional one in which a roller is used for the pressing portion of the holder 25, and the production efficiency is improved. It is possible to increase. Further, the die pressing member 29 of each holder 25 is formed into a triangular prism shape as a whole, and the shaft 27 is arranged at one corner of the triangle, and the pressing surface 31 is arranged at the opposite side of the corner. Because there is
The pressing surface 31 can be formed without enlarging the entire die pressing member 29.
There is also an advantage that the radius of curvature of can be set sufficiently large.

【0022】つづいて、本発明の他の実施の形態を図7
〜図9に基づいて説明する。
Next, another embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

【0023】以下で説明するベンディング装置は、長尺
ワーク12の断面形状等に起因した曲げ加工時の捩れ、
例えば、図7で示す製品端部側の矢印b,bで示すよう
な捩れを矯正する機能を備えたもので、図1〜図6に示
したものとはホルダ25の型押圧部材39の形状のみが
異なる。したがって、以下ではこの型押圧部材39の構
造についてだけ詳述し、他の共通する部分の構成は図1
〜図6に示したものと同一部分に同一符号を付して詳細
な説明を省略するものとする。
The bending apparatus described below is designed to twist the bending work due to the sectional shape of the long work 12,
For example, the shape of the die pressing member 39 of the holder 25 is the same as that shown in FIGS. 1 to 6, which has a function of correcting the twist as shown by arrows b, b on the product end side shown in FIG. Only different. Therefore, in the following, only the structure of the die pressing member 39 will be described in detail, and the configuration of other common portions will be described with reference to FIG.
The same parts as those shown in FIG. 6 are designated by the same reference numerals and detailed description thereof will be omitted.

【0024】各ホルダ25の型押圧部材39は三角柱状
に形成され、シャフト27に沿うその一つの面には、長
尺ワーク12の最終曲げ形状に略沿った曲率の凸形状ま
たは凹形状の押圧面41が設けられている。ただし、両
側の端部近くに配置されているシリンダの対1,2の押
圧面41には、曲げ加工に伴う成形品端部の捩れ(図7
のb,bで示す捩れ)と逆方向の荷重を付与するワーク
幅方向の傾斜が設けられている。この押圧面41の傾斜
は両端部のシリンダの対1,2のものが最も急角度に設
定され、中心側のシリンダの対1,2になるに従って次
第に角度が緩やかになるように設定されている。
The die pressing member 39 of each holder 25 is formed in a triangular prism shape, and one surface of the holder 25 along the shaft 27 has a convex shape or a concave shape having a curvature substantially along the final bending shape of the long work 12. A surface 41 is provided. However, the pressing surfaces 41 of the pair of cylinders 1 and 2 arranged near the ends on both sides are twisted at the end portions of the molded product due to bending (see FIG. 7).
B) and the inclination in the work width direction for applying a load in the opposite direction. The inclination of the pressing surface 41 is set to the steepest angle for the pair of cylinders 1 and 2 at both ends, and is set so that the angle becomes gradually gentle as it becomes the pair 1 and 2 of the cylinders on the center side. .

【0025】このベンディング装置は、以上のように両
側の端部寄りのシリンダの対1,2のホルダ25に、曲
げ加工に伴う成型品の捩れと逆方向の傾斜を持つ押圧面
41が設けられているため、曲げ加工時に、シリンダ
1,2の押付荷重がホルダ25を通して各型33,34
に加えられると、ホルダ25の押圧面41の傾斜によ
り、各型33,34と長尺ワーク12とに曲げ加工に伴
う捩れb,bを打ち消すような捩れが予め付与されるこ
ととなる。したがって、曲げ加工を完了し、型33,3
4から取り出された成形品は何等捩れの無いものとな
る。
In this bending apparatus, as described above, the holder 25 of the pair of cylinders 1 and 2 near the ends on both sides is provided with the pressing surface 41 having the inclination in the direction opposite to the twist of the molded product due to the bending process. Therefore, during the bending process, the pressing load of the cylinders 1 and 2 passes through the holder 25 and the molds 33 and 34.
In addition, due to the inclination of the pressing surface 41 of the holder 25, the dies 33 and 34 and the long work 12 are preliminarily provided with a twist that cancels the twists b and b associated with the bending process. Therefore, the bending process is completed, and the molds 33, 3 are
The molded product taken out from No. 4 has no twist.

【0026】尚、以上では一部のホルダ25の押圧面4
1にワーク幅方向の傾斜を設けることで、曲げ加工に伴
う成型品の捩れを矯正するようにしたものについて説明
したが、同様に任意のホルダ25の押圧面に傾斜を設け
ることにより、長尺ワークに三次元的な曲げを施すこと
も可能である。
In the above, the pressing surface 4 of some of the holders 25 is
1 has been described in which the twisting of the molded product due to the bending process is corrected by providing the inclination in the work width direction. It is also possible to bend the workpiece in three dimensions.

【0027】[0027]

【発明の効果】以上のように本発明は、各ホルダの押さ
え型に対する押圧部を、長尺ワークの最終曲げ形状に略
沿う曲面形状に形成し、長尺ワークの曲げ加工時、特に
大きな押付荷重の加えられる曲げ加工終期に各ホルダが
押さえ型に対して面で接触するようにしたため、加工時
に長尺ワーク上に押付荷重が集中することが無くなり、
したがって、成形品の断面歪みや皺、折れ線等の発生を
無くして、成形品の品質を大幅に向上させることができ
る。また、各シリンダから押さえ型に加えられる荷重が
長尺ワークの最終曲げ形状に略沿う広い領域に分散され
て、長尺ワークに局部的な荷重の集中が生じなくなるこ
とから、加工時における各シリンダのストローク速度を
速くして、生産性の大幅な向上を図ることができる。
As described above, according to the present invention, the pressing portion of each holder with respect to the pressing die is formed into a curved surface shape substantially conforming to the final bending shape of the long work, and when pressing the long work, a particularly large pressing force is applied. Since each holder comes into surface contact with the pressing die at the end of the bending process where a load is applied, the pressing load does not concentrate on the long workpiece during processing,
Therefore, it is possible to significantly improve the quality of the molded product by eliminating the cross-sectional distortion of the molded product, the generation of wrinkles, the broken lines, and the like. In addition, the load applied to the pressing die from each cylinder is distributed over a wide area that is approximately along the final bending shape of the long work piece, and local concentration of load does not occur on the long work piece. The stroke speed of can be increased and the productivity can be greatly improved.

【0028】また、さらに前記ホルダの押圧部に、長尺
ワークと前記各型に捩れ方向の荷重を付与するワーク幅
方向の傾斜を設けた場合には、一度の成形によって成形
品の捩れ矯正や、ワークの三次元的な加工を行うことが
できる。しかも、可動シリンダや受動シリンダの配置
や、各型の形状を変更することなく、ホルダの形状変更
のみによってこのような加工を実現することができるた
め、種々の形状のワークの加工に極めて容易に対応で
き、その結果、設備コストを大幅に削減することができ
る。
Further, when the pressing portion of the holder is provided with a slant in the work width direction for applying a load in the twisting direction to the long work and each die, the twisting of the molded product can be corrected by one-time molding. , Three-dimensional processing of the work can be performed. Moreover, since it is possible to realize such processing only by changing the shape of the holder without changing the arrangement of the movable cylinder or the passive cylinder or changing the shape of each mold, it is extremely easy to process workpieces of various shapes. As a result, equipment costs can be significantly reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一つの実施の形態を示す正面図。FIG. 1 is a front view showing an embodiment of the present invention.

【図2】車体の側面図。FIG. 2 is a side view of the vehicle body.

【図3】図2のA−A線に沿う断面図。FIG. 3 is a sectional view taken along line AA of FIG. 2;

【図4】本発明の一つの実施の形態を示す斜視図。FIG. 4 is a perspective view showing an embodiment of the present invention.

【図5】同実施の形態を示す側面図。FIG. 5 is a side view showing the same embodiment.

【図6】同実施の形態を示す断面図。FIG. 6 is a cross-sectional view showing the same embodiment.

【図7】本発明の他の実施の形態を示す斜視図。FIG. 7 is a perspective view showing another embodiment of the present invention.

【図8】同実施の形態を示す斜視図。FIG. 8 is a perspective view showing the same embodiment.

【図9】同実施の形態を示す断面図。FIG. 9 is a cross-sectional view showing the same embodiment.

【図10】従来の技術を示す正面図。FIG. 10 is a front view showing a conventional technique.

【図11】同技術を示す斜視図。FIG. 11 is a perspective view showing the same technique.

【図12】同技術を示す側面図。FIG. 12 is a side view showing the same technique.

【符号の説明】[Explanation of symbols]

1…可動シリンダ、 2…受動シリンダ、 25…ホルダ、 31,41…押圧面(押圧部)、 33…上型(押さえ型)、 34…下型(押さえ型)。 DESCRIPTION OF SYMBOLS 1 ... Movable cylinder, 2 ... Passive cylinder, 25 ... Holder, 31, 41 ... Pressing surface (pressing part), 33 ... Upper mold (pressing type), 34 ... Lower mold (pressing type).

───────────────────────────────────────────────────── フロントページの続き (72)発明者 行之内 克守 千葉県千葉市稲毛区長沼町330番地 鬼怒 川ゴム工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsumori Yukinouchi 330 Kuma, Naganuma-cho, Inage-ku, Chiba-shi, Chiba Kinugawa Rubber Industry Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 横一列に並設された複数の可動シリンダ
と、これらの可動シリンダに対向して横一列に並設さ
れ、可動シリンダの伸張動に伴って後退動する複数の受
動シリンダと、前記各シリンダの先端に取り付けられた
ホルダと、前記可動シリンダ側の複数のホルダと、前記
受動シリンダ側の複数のホルダとに夫々保持された柔軟
性を有する一対の押さえ型とを備え、前記各シリンダの
ストロークを制御することにより、前記一対の押さえ型
で挟持した長尺ワークを長手方向に曲げ形成するベンデ
ィング装置において、前記各ホルダの押さえ型に対する
押圧部を、長尺ワークの最終曲げ形状に略沿う曲面形状
に形成したことを特徴とするベンディング装置。
1. A plurality of movable cylinders arranged side by side in a row, and a plurality of passive cylinders arranged side by side in a row in opposition to the movable cylinders and moving backward with extension of the movable cylinders. A holder attached to the tip of each cylinder, a plurality of holders on the movable cylinder side, and a pair of flexible pressing molds held by the plurality of holders on the passive cylinder side, respectively. In a bending device that bends and forms a long work sandwiched by the pair of holding dies in the longitudinal direction by controlling the stroke of the cylinder, the pressing portion of each holder with respect to the holding dies has a final bending shape of the long work. A bending device characterized in that it is formed into a curved shape that substantially conforms.
【請求項2】 前記ホルダの押圧部に、長尺ワークと前
記各型に捩れ方向の荷重を付与するワーク幅方向の傾斜
を設けたことを特徴とする請求項1に記載のベンディン
グ装置。
2. The bending device according to claim 1, wherein the pressing portion of the holder is provided with a slant in a work width direction that applies a load in a twisting direction to the long work and each die.
JP7285425A 1995-11-02 1995-11-02 Bending device Expired - Fee Related JP3058819B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7285425A JP3058819B2 (en) 1995-11-02 1995-11-02 Bending device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7285425A JP3058819B2 (en) 1995-11-02 1995-11-02 Bending device

Publications (2)

Publication Number Publication Date
JPH09122763A true JPH09122763A (en) 1997-05-13
JP3058819B2 JP3058819B2 (en) 2000-07-04

Family

ID=17691364

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7285425A Expired - Fee Related JP3058819B2 (en) 1995-11-02 1995-11-02 Bending device

Country Status (1)

Country Link
JP (1) JP3058819B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100398227C (en) * 2007-02-02 2008-07-02 吉林大学 Flexible forming apparatus with flexible roll for machining 3D workpiece
JP2008296286A (en) * 2001-07-02 2008-12-11 Accra Teknik Ab Method and apparatus for fabricating three-dimensional body
KR101030382B1 (en) * 2008-12-10 2011-04-20 부산대학교 산학협력단 Forming punch of a changeable die for metal plate forming and a changeable die using the same
CN102581085A (en) * 2012-02-28 2012-07-18 江苏奔宇车身制造有限公司 Integrated bending forming device for abnormally-shaped tube

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102195636B1 (en) * 2019-10-30 2020-12-28 주식회사 제일금속 Apparatus for bending bar

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008296286A (en) * 2001-07-02 2008-12-11 Accra Teknik Ab Method and apparatus for fabricating three-dimensional body
CN100398227C (en) * 2007-02-02 2008-07-02 吉林大学 Flexible forming apparatus with flexible roll for machining 3D workpiece
KR101030382B1 (en) * 2008-12-10 2011-04-20 부산대학교 산학협력단 Forming punch of a changeable die for metal plate forming and a changeable die using the same
CN102581085A (en) * 2012-02-28 2012-07-18 江苏奔宇车身制造有限公司 Integrated bending forming device for abnormally-shaped tube

Also Published As

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