JP2008161914A - Bent product and its bending method, bending device - Google Patents

Bent product and its bending method, bending device Download PDF

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JP2008161914A
JP2008161914A JP2006354477A JP2006354477A JP2008161914A JP 2008161914 A JP2008161914 A JP 2008161914A JP 2006354477 A JP2006354477 A JP 2006354477A JP 2006354477 A JP2006354477 A JP 2006354477A JP 2008161914 A JP2008161914 A JP 2008161914A
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bending
design surface
guide member
surface portion
bent
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JP5067783B2 (en
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Hitoshi Niimura
仁 新村
Morimasa Yokoyama
守政 横山
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TOKO SEISAKUSHO KK
Aisin Keikinzoku Co Ltd
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TOKO SEISAKUSHO KK
Aisin Keikinzoku Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a bent product which has a small radius without cracks and wrinkles in the designed surface part where becomes an appearance design and to provide a bending method and a bending device which are suitable to this small radius bending. <P>SOLUTION: This product is a bent product which is composed of the designed surface part and an aluminum-alloy extruded shape having an rising part which is raised from the rear side of the designed surface part and one end of the designed surface part is an inside radius and the other end is an outside radius. The outside minimum radius bent part is the radius of <70 mm, the width of the designed surface part in the minimum radius part is ≥10 mm and the thickness of the designed surface part is in the range of 1-5 mm. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、アルミニウム及びアルミニウム合金の押出形材を用いた曲げ加工製品とそれに適したその曲げ加工方法及び曲げ加工装置に関する。   The present invention relates to a bent product using an extruded shape of aluminum and aluminum alloy, a bending method and a bending apparatus suitable for the bent product.

押出形材の曲げ加工にはストレッチベンダー機やロータリーベンダー機が用いられている。
この種のベンダー機を用いて、フランジ状の意匠面部を有する例えば自動車のドアサッシュを曲げ加工すると、曲げ外側Ｒ部は伸びが大きく、意匠面部縁に亀裂が入りやすく、曲げ内側Ｒ部は圧縮応力により意匠面部にしわが発生しやすい。
ストレッチベンデング等により、曲げ中立軸を外側よりに設定すれば亀裂を抑えることができても内側に大きなしわが生じ、逆に曲げ中立軸を内側よりに設定すると、内側のしわ発生を抑えることができても外側の亀裂発生を抑えることができないために比較的大きなＲの曲げ加工にしか適用できなかった。 Stretch bender machines and rotary bender machines are used for bending extruded shapes.
When this type of bender machine is used to bend a door sash of an automobile having a flange-shaped design surface, for example, the bent outer R portion is large in elongation, the design surface portion edge is easily cracked, and the bent inner R portion is compressed. Wrinkles tend to occur on the design surface due to stress.
If the bending neutral axis is set from the outside by stretch bending, etc., cracks can be suppressed, but large wrinkles will be generated on the inside. Conversely, if the bending neutral axis is set from the inside, the generation of inner wrinkles will be suppressed. However, since it was not possible to suppress the generation of cracks on the outside, it could only be applied to a relatively large R bending process.

特開２００２−１１３５２２号公報には、断面Ｌ字状の被加工部材の一辺を型部材と押さえ板部材とで挟み込み、曲げ金型にならってプレス曲げする曲げ加工方法を開示するが、平面部を挟み込むだけでは曲げＲが小さい場合に内側の板厚厚み方向の変形を抑え込むのが難しく、挟み込みの締め付け力が弱いと押さえ板部材と型部材との間が拡がり、しわが発生し、逆に挟み込みの締め付け力が強いと平面部にキズが付く問題がある。
また、曲げ中立軸を内側よりに設定すると曲げ外側が破断する恐れが高い。 Japanese Patent Laid-Open No. 2002-113522 discloses a bending method in which one side of a workpiece having an L-shaped cross section is sandwiched between a mold member and a pressing plate member, and press bending is performed according to a bending die. It is difficult to suppress the deformation in the direction of the inner plate thickness when the bending R is small by simply sandwiching the sheet, and if the clamping force is weak, the gap between the holding plate member and the mold member will expand, and conversely, If the clamping force is strong, there is a problem that the flat part is scratched.
Moreover, if the bending neutral axis is set from the inside, the outside of the bending is likely to break.

特開２００２一１１３５２２号公報JP 2002-113522 A

本発明は、上記背景技術に鑑みて、外観意匠となる意匠面部に亀裂やしわがない小Ｒ曲げ加工製品の提供を目的とする。
また、この小Ｒ曲げ加工に適した曲げ加工方法及び曲げ加工装置の提供も目的とする。 In view of the above-described background art, an object of the present invention is to provide a small R-bending product in which a design surface portion serving as an external design is free from cracks and wrinkles.
Another object of the present invention is to provide a bending method and a bending apparatus suitable for this small R bending process.

本発明に係る曲げ加工製品は、意匠面部と、意匠面部の裏面から起立する起立部を長手方向に有するアルミニウム合金の押出形材からなり、意匠面部の一の縁が内側Ｒ、他の縁が外側Ｒとなる曲げ加工製品であって、外側最小Ｒ曲げ部がＲ７０未満であり且つ当該最小Ｒ曲げ部における意匠面部の幅１０ｍｍ以上、意匠面部の肉厚１〜５ｍｍの範囲であることを特徴とする。
ここで意匠面部とは、おおむね平面状の意匠面を有する趣旨であり、幅方向に平面である場合のみならず緩やかな曲率を有している場合も含まれる。
また、アルミニウム合金の押出形材には、純アルミニウム系の押出形材が含まれる。
外側最小Ｒ曲げ部がＲ７０未満とは最も強く曲げた部分の意匠面部外側の縁部の曲げＲ半径が７０ｍｍ未満であることを意味する。
よって、内側の最小Ｒは７０ｍｍより小さく、意匠面部の幅により定まる。
最小Ｒ曲げ部の前後は曲げＲが大きくなるように徐変していてよく、その場合には最小Ｒ曲げ部をコーナー部とする意匠面部外側の両側の接線の交差角度が１５０度以下である。
本発明に係る曲げ加工製品の例としては自動車のドアサッシュ等が挙げられる。
自動車のドアサッシュはピラー部とドアフレーム部とのつなぎコーナー部が強い小Ｒ曲げ部となっている。 The bent product according to the present invention comprises an extruded shape of an aluminum alloy having a design surface portion and an upright portion rising from the back surface of the design surface portion in the longitudinal direction. One edge of the design surface portion is the inner side R, and the other edge is It is a bent product that becomes the outer side R, the outer side minimum R-bending part is less than R70, the width of the design surface part in the minimum R-bending part is 10 mm or more, and the wall thickness of the design surface part is 1 to 5 mm. And
Here, the design surface portion is intended to have a generally flat design surface, and includes not only a flat surface in the width direction but also a gentle curvature.
The extruded shape of the aluminum alloy includes a pure aluminum-based extruded shape.
The outer minimum R-bending portion being less than R70 means that the bending R radius of the outer edge of the design surface portion of the most strongly bent portion is less than 70 mm.
Therefore, the inner minimum R is smaller than 70 mm and is determined by the width of the design surface portion.
Before and after the minimum R-bending portion, the bending R may be gradually changed, and in this case, the intersection angle of tangents on both sides of the design surface outside the minimum R-bending portion as a corner portion is 150 degrees or less. .
Examples of the bent product according to the present invention include an automobile door sash and the like.
The door sash of an automobile is a small R-bent portion with a strong corner portion connecting the pillar portion and the door frame portion.

本発明に係る小Ｒ曲げ加工製品を得るのに適したアルミニウム合金押出形材の曲げ加工方法は意匠面部と、意匠面部の裏面から起立する起立部を長手方向に有するアルミニウム合金の押出形材を、意匠面部の一の縁が内側Ｒ、他の縁が外側Ｒとなるように曲げる曲げ加工方法であって、起立部と意匠面部の裏面とを曲げ内側から回転曲げ金型で拘束しつつ、意匠面部の表面を加圧手段で連続的又は断続的に加圧しながら曲げることを特徴とする。
ここで、押出形材の長手方向に引張力を加えるとともに曲げの曲率変化に応じて引張力を調整しながら曲げるとよい。 An aluminum alloy extruded profile suitable for obtaining a small R-bent product according to the present invention includes an aluminum alloy extruded profile having a design surface portion and an upright portion erecting from the back surface of the design surface portion in the longitudinal direction. , A bending method in which one edge of the design surface portion is bent inside R, and the other edge is outside R, while constraining the standing portion and the back surface of the design surface portion from the bending inner side with a rotating bending mold, The surface of the design surface portion is bent while being continuously or intermittently pressed by a pressing means.
Here, it is preferable to apply a tensile force in the longitudinal direction of the extruded profile and bend it while adjusting the tensile force according to the bending curvature change.

本発明に係る曲げ加工方法の適用に適した曲げ加工装置としては、意匠面部と、意匠面部の裏面から起立する起立部を長手方向に有するアルミニウム合金の押出形材を、意匠面部の一の縁が内側Ｒ、他の縁が外側Ｒとなるように曲げる加工装置であって、曲げ内側から意匠面部の裏面と起立部を拘束する回転曲げ金型と、意匠面部の表面と起立部の外側を押さえるガイド部材とを備えるとともに、ガイド部材を曲げ外側から回転曲げ金型に向けて加圧するガイド部材押さえユニットと、ガイド部材を上から連続的又は断続的に加圧する加圧手段とを有し、ガイド部材押さえユニットとガイド部材とは回転曲げ金型の回転に同期して相対移動可能になっていることを特徴とする。
ここで、押出形材の長手方向に引張力を加えるとともに曲げの曲率変化に応じて引張力を調整するテンション手段を有しているのが好ましい。
テンション手段とは例えば押出形材の長手方向両端をチャッキングし、両端のうち、どちらか一方又は両方のチャック部をシリンダー等で引張る方法がある。 As a bending apparatus suitable for application of the bending method according to the present invention, an extruded shape of an aluminum alloy having a design surface portion and an upright portion rising from the back surface of the design surface portion in the longitudinal direction, one edge of the design surface portion. Is a processing device that bends so that the other edge is the outer side R, and a rotating bending mold that restrains the back surface and the standing part of the design surface part from the inside of the bending, and the surface of the design surface part and the outside of the standing part A guide member pressing unit, a guide member pressing unit that pressurizes the guide member toward the rotary bending mold from the outside, and a pressurizing unit that pressurizes the guide member continuously or intermittently from above. The guide member pressing unit and the guide member are characterized in that they can be moved relative to each other in synchronization with the rotation of the rotary bending mold.
Here, it is preferable to have tension means that applies a tensile force in the longitudinal direction of the extruded profile and adjusts the tensile force in accordance with a bending curvature change.
The tension means includes, for example, a method of chucking both ends in the longitudinal direction of the extruded profile and pulling one or both of the chuck portions with a cylinder or the like.

ガイド部材押さえユニットは、ガイド部材と回転曲げ金型との間に押出形材の起立部を挟み込むようにガイド部材を回転曲げ金型側に押圧するのを目的とし、加圧手段は油圧又はエアーシリンダーであってよい。   The guide member holding unit is intended to press the guide member toward the rotary bending die so that the raised portion of the extruded shape member is sandwiched between the guide member and the rotary bending die. It can be a cylinder.

ガイド部材は、回転曲げ金型の回転に同期しながら押出形材の曲げ位置に追随して移動させると製品にこすれキズが生じにくく、押出形材が回転曲げ金型の側部に密着して形状にならうように作用する。
このような、ガイド部材押さえユニットとガイド部材との相対移動は、ガイド部材押さえユニット側に設けたローラーによるものでもよく、サーボモータ駆動等にてサーボ制御されたラック＆ピニオン機構でもよい。 If the guide member is moved following the bending position of the extruded profile while being synchronized with the rotation of the rotating bending mold, the product is less likely to be scratched and the extruded profile is in close contact with the side of the rotating bending mold. Acts like a shape.
Such a relative movement between the guide member pressing unit and the guide member may be performed by a roller provided on the guide member pressing unit side, or may be a rack and pinion mechanism servo-controlled by a servo motor drive or the like.

本発明においては、ロータリーベンデングと称される回転曲げ工法をベースに、回転曲げ金型で意匠面部の裏面と、意匠面部の裏面から起立した起立部を曲げ内側から拘束し、意匠面部の表面を連続的又は断続的に加圧したのでしわが発生しようとする変形を面方向から圧縮するように作用し、曲げの中立軸を意匠面部の幅方向中央又は外側よりに設定できるので意匠面部の外側縁部に亀裂が発生しにくくなる。
これにより外観意匠面となる意匠面部に亀裂やしわのない品質に優れた小Ｒ曲げ加工製品が得られる。 In the present invention, based on the rotary bending method called rotary bending, the back surface of the design surface part and the upright part rising from the back surface of the design surface part are constrained from the inner side of the design surface part by the rotary bending die, and the surface of the design surface part Since the deformation which is going to generate wrinkles is compressed from the surface direction because the pressure is continuously or intermittently pressed, the neutral axis of bending can be set from the center or outside of the design surface portion in the width direction, so the design surface portion Cracks are less likely to occur at the outer edge.
As a result, a small R-bending product excellent in quality free from cracks and wrinkles in the design surface portion serving as the appearance design surface can be obtained.

本発明においてはガイド部材を回転曲げ金型に向けて側部から押圧するガイド部材押さえユニットを有するとともに、このガイド部材が回転方向に沿って移動可能になっているので製品にキズが発生しにくく、曲げ金型の形状にならって押出形材が密着するのでさらに外観品質に優れた曲げ加工製品が得られる。   The present invention has a guide member pressing unit that presses the guide member from the side toward the rotating bending mold, and the guide member is movable along the rotation direction, so that the product is hardly damaged. Since the extruded shape closely adheres to the shape of the bending mold, a bent product with better appearance quality can be obtained.

本発明の実施例を図８に示した曲げ加工製品２を例にして説明する。
曲げ加工製品２は自動車のドアサッシュモールの例であり、アルミニウム合金の押出形材を粗材とし、外観意匠となる意匠面部２ａと意匠面部２ａの裏面から起立部２ｂが立設している。
意匠面部２ａは図８左側のピラー部から右側のアッパー部にかけて平面視略Ｌ字形に曲げ加工されている。
ピラー部とアッパー部とのつなぎ部が最小Ｒ曲げ部になっていて、この部分の意匠面部の幅２ｃが広い程、曲げ加工が難しくなり、外側最小Ｒ部では意匠面部の縁が伸びて、亀裂が生じやすく、内側最小Ｒ部では圧縮応力が生じ、意匠面部にしわが発生しやすい。
図８に示した例ではピラー部がコーナー部側に向けて意匠面部２ａの幅が狭くなるように徐変している例であるが必ずしも徐変しているものに限定する必要はなく、等幅でもよいが、本明細書にて単に意匠面部の幅と表現した場合には最小Ｒ部の意匠面部の幅２ｃをいい、曲げ角度は最小Ｒ部の前後が徐変曲げになっていて図８に示した両側の接線の交差角度θをいう。
意匠面部２ａは幅方向に緩やかな曲率を有している。
また、図８に示した起立部２ｂの例は、意匠面部の裏面外側よりから立設しているが、回転曲げ金型で拘束できる部分があれば、意匠面部の裏面のどの位置から立設していてもよく、必ずしも垂直に立設する必要もなく、また起立部にリブや曲げ部等を有していてもよい。 The embodiment of the present invention will be described with reference to the bent product 2 shown in FIG.
The bent product 2 is an example of an automobile door sash molding, in which an extruded shape of an aluminum alloy is used as a rough material, and an upright portion 2b is erected from the back surface of the design surface portion 2a and the design surface portion 2a.
The design surface portion 2a is bent into a substantially L shape in plan view from the left pillar portion to the right upper portion in FIG.
The connecting part between the pillar part and the upper part is the minimum R-bending part, and the wider the width 2c of the design surface part of this part, the more difficult the bending process is, and the edge of the design surface part extends at the outer minimum R part, Cracks are likely to occur, compressive stress is generated in the inner minimum R portion, and wrinkles are likely to occur in the design surface portion.
In the example shown in FIG. 8, the pillar portion is gradually changed so that the width of the design surface portion 2a becomes narrower toward the corner portion side, but it is not always necessary to limit to the one that gradually changes, etc. The width may be a width, but when simply expressed as the width of the design surface portion in this specification, it means the width 2c of the design surface portion of the minimum R portion, and the bending angle is a gradual change bending before and after the minimum R portion. 8 is an intersection angle θ of tangent lines on both sides shown in FIG.
The design surface portion 2a has a gentle curvature in the width direction.
In addition, the example of the upright portion 2b shown in FIG. 8 is erected from the outside of the back surface of the design surface portion, but from any position on the back surface of the design surface portion as long as there is a portion that can be restrained by a rotating bending mold. However, it is not always necessary to stand upright, and the standing part may have a rib or a bent part.

図１は、本発明に係る曲げ加工装置の平面図を示し、図１〜図４にて曲げ加工の進行状況を示す。
図５は図４の状態での側面視を示し、テンションアーム１５、ラップ曲げシリンダー１６等は図示を省略してある。
また、回転テーブル等は省略し、型の動きのみを模式的に示した。
まず、図１と図５に基づいて曲げ加工装置の構造例を説明する。
装置本体の上面にロータリーベース１０を有し、このローターベース１０に曲げ角度の強い小Ｒ回転曲げ金型１１とアッパー部の相対的に曲げＲの大きい大Ｒ曲げ金型を据え付けてある。 FIG. 1 shows a plan view of a bending apparatus according to the present invention, and shows the progress of the bending process in FIGS.
FIG. 5 shows a side view in the state of FIG. 4, and the tension arm 15 and the wrap bending cylinder 16 are not shown.
Further, the rotary table and the like are omitted, and only the movement of the mold is schematically shown.
First, a structural example of a bending apparatus will be described with reference to FIGS. 1 and 5.
A rotary base 10 is provided on the upper surface of the apparatus main body, and a small R rotating bending die 11 having a large bending angle and a large R bending die having a relatively large bending R at the upper portion are installed on the rotor base 10.

ロータリーベース１０は図５に示すようにサーボモーター等のロータリー駆動源１８と伝達ギヤ１８ａ、１８ｂ、１８ｃを介して連結されていて回転可能に制御されている。   As shown in FIG. 5, the rotary base 10 is connected to a rotary drive source 18 such as a servo motor via transmission gears 18a, 18b and 18c and is controlled to be rotatable.

図１に示すように、ロータリーベース１０側に固定チャック１７を設け、装置本体から回動可能に取り付けたテンションアーム１５側にテンションシリンダー１４を連結してあり、テンションシリンダー１４のピストンロッド１４ａにテンションチャック１３を設けてある。
押出形材１は、一端を固定チャック１７にチャッキングし、他端をテンションチャック１３にチャッキングし、テンションシリンダー１４の作動により引張力を調整する。
チャック手段は押出形材１をチャッキングできれば特に限定されないが、図５に示した例はチャッキングシリンダー１７ａのチャッキングヘッド１７ｂと固定プレート１７ｃにてチャックする例を示す。 As shown in FIG. 1, a fixed chuck 17 is provided on the rotary base 10 side, a tension cylinder 14 is connected to a tension arm 15 that is rotatably attached to the apparatus main body, and a tension rod 14 is attached to a piston rod 14 a of the tension cylinder 14. A chuck 13 is provided.
One end of the extruded profile 1 is chucked to the fixed chuck 17, the other end is chucked to the tension chuck 13, and the tension force is adjusted by the operation of the tension cylinder 14.
The chuck means is not particularly limited as long as it can chuck the extruded profile 1, but the example shown in FIG. 5 shows an example in which chucking is performed by the chucking head 17 b and the fixed plate 17 c of the chucking cylinder 17 a.

小Ｒ回転曲げ金型１１の側部には、押出形材１を側部から押さえるガイド部材３０と、このガイド部材３０を側部から押圧するガイド部材押さえユニット２０を有する。
また、ガイド部材３０を垂直方向から加圧する加圧手段４０を備えている。
その部分断面図を図６に示し、ガイド部材押さえユニット２０の押さえ部材２４の部分の平面図を図７に示す。 A side portion of the small R rotating bending die 11 has a guide member 30 for pressing the extruded shape member 1 from the side portion and a guide member pressing unit 20 for pressing the guide member 30 from the side portion.
Further, a pressurizing unit 40 that pressurizes the guide member 30 from the vertical direction is provided.
A partial cross-sectional view thereof is shown in FIG. 6, and a plan view of a portion of the holding member 24 of the guide member holding unit 20 is shown in FIG.

ガイド部材押さえユニット２０は、ガイド部材３０を側方から押圧する押さえ部材２４を有し、押さえ部材２４は押圧シリンダー２１のピストンロッド２２に連結したヘッド２３と軸２３ａを介して軸着してある。
ガイド部材３０は押さえ部材２４に、軸部２５ａにて回転自在に設けたローラー２５により回転曲げ方向に移動可能になっている。
本実施例においては、押さえ部材２４とガイド部材３０との相対移動をローラーにて実現したが、サーボ制御されたラック＆ピニオン構造でもよく、回転曲げの進行に応じて同期制御できれば相対移動手段を問わない。 The guide member pressing unit 20 includes a pressing member 24 that presses the guide member 30 from the side. The pressing member 24 is pivotally attached to the piston rod 22 of the pressing cylinder 21 via a head 23 and a shaft 23a. .
The guide member 30 is movable in the rotational bending direction by a roller 25 provided on the pressing member 24 so as to be rotatable by a shaft portion 25a.
In this embodiment, the relative movement between the pressing member 24 and the guide member 30 is realized by a roller. However, a servo-controlled rack and pinion structure may be used, and the relative movement means can be used as long as it can be synchronously controlled according to the progress of rotational bending. It doesn't matter.

ガイド部材３０は図６に示すように、側圧部３１と面圧部３２とを有する略断面Ｌ字型になっていて押出形材１の意匠面部２ａは小Ｒ回転曲げ金型１１の上面と、ガイド部材３０の面圧部３２で拘束し、押出形材１の起立部２ｂは小Ｒ回転曲げ金型１１の側部とガイド部材３０の側圧部３１にて拘束することになる。
意匠面部２ａが平面である場合には、小Ｒ回転曲げ金型１１の上面及びガイド部材の面圧部３２は平面でよいが意匠面部が幅方向に緩やかな曲率を有している場合には、その曲率に合わせて小Ｒ曲げ金型１１の上面及びガイド部材の面圧部３２の形状を曲面にする。
本実施例においては、曲げ加工時に押出形材の意匠面部２ａを上からガイド部材３０の面圧部３２で加圧する加圧手段４０として、図５、図６に示すように油圧又はエアー圧の加圧シリンダー４１のピストンロッド４１ａにて連続的又は断続的に加圧する構造を示す。
曲げ加工に同期して加圧制御できれば加圧手段は本実施例に限定されない。 As shown in FIG. 6, the guide member 30 is substantially L-shaped in cross section having a side pressure portion 31 and a surface pressure portion 32, and the design surface portion 2 a of the extruded shape member 1 is formed on the upper surface of the small R rotating bending die 11. The rising portion 2 b of the extruded shape member 1 is restrained by the side portion of the small R rotating bending mold 11 and the side pressure portion 31 of the guide member 30.
When the design surface portion 2a is a flat surface, the upper surface of the small R rotating bending die 11 and the surface pressure portion 32 of the guide member may be flat, but the design surface portion has a gentle curvature in the width direction. The upper surface of the small R-bending mold 11 and the shape of the surface pressure portion 32 of the guide member are curved according to the curvature.
In the present embodiment, as the pressurizing means 40 that pressurizes the design surface portion 2a of the extruded shape member from above with the surface pressure portion 32 of the guide member 30 during bending, as shown in FIG. 5 and FIG. The structure which pressurizes continuously or intermittently with the piston rod 41a of the pressurization cylinder 41 is shown.
The pressurizing means is not limited to this embodiment as long as the pressurization can be controlled in synchronization with the bending process.

次に図１〜図４に基づいて曲げ加工の手順を説明する。
図１は、曲げ加工装置に直線状の押出形材１をセッティングした状態を示す。
押出形材１の意匠面部２ａは製品形状に合わせてプレス等にて徐変切断してある。
ガイド部材押さえユニット２０のピストンロッド２２を後退させてガイド部材３０と小Ｒ回転曲げ金型１１との間に粗材を挿通し、アーパー部側を固定チャック１７にチャッキングし、ピラー部側をテンションチャック１３にチャッキングし、テンションシリンダー１４にて所定の引張力を加える。
その状態からロータリーベース１０を図２に示す方向に回転することでアーパー部が大Ｒ曲げ型の形状にならって曲げ加工される。 Next, the procedure of the bending process will be described with reference to FIGS.
FIG. 1 shows a state where a linear extruded profile 1 is set in a bending apparatus.
The design surface portion 2a of the extruded profile 1 is gradually changed by a press or the like in accordance with the product shape.
The piston rod 22 of the guide member holding unit 20 is retracted, and a coarse material is inserted between the guide member 30 and the small R rotating bending die 11, the aper portion side is chucked to the fixed chuck 17, and the pillar portion side is The tension chuck 13 is chucked and a predetermined tensile force is applied by the tension cylinder 14.
From this state, the rotary base 10 is rotated in the direction shown in FIG. 2 to bend the Arper portion in the shape of a large R-bending die.

図２〜図３に示すように、小Ｒ回転曲げ金型１１にて曲げ加工する際には、側部からガイド部材３０の側圧部３１にて押出形材１の起立部２ｂを押圧するようにピストンロッド２３を前進させ押さえ部材２４にてガイド部材３０を押圧する。
この際にガイド部材３０は、ローラー２５により回転曲げ方向に移動自在になっているので押出形材の曲げ加工に追随する。
これと同時に、加圧手段４０にて押出形材１の意匠面部２ａをガイド部材３０の面圧部３２にて加圧する。
加圧方法としては、図６に示すようにピストンロッド４１ａにて連続的に加圧してもよいが、曲げの進行により曲率が変化し、加圧面３２と意匠面部２ａとの当接面が移動するので断続的に加圧するのがよい。
加圧間隔は曲げ速度や意匠面部の幅にも異なり、しわが発生する直前に加圧するように設定する。
図４に示すように、ピラー部の緩やかな曲げはラップ曲げシリンダー１６のロッド１６ａを前進させ、テンションアーム１５の回転により実施する。 As shown in FIGS. 2 to 3, when bending is performed with the small R rotating bending die 11, the standing portion 2 b of the extruded shape member 1 is pressed from the side portion by the side pressure portion 31 of the guide member 30. Then, the piston rod 23 is advanced and the guide member 30 is pressed by the pressing member 24.
At this time, since the guide member 30 is movable in the rotational bending direction by the roller 25, it follows the bending of the extruded shape member.
At the same time, the pressurizing means 40 pressurizes the design surface portion 2 a of the extruded profile 1 with the surface pressure portion 32 of the guide member 30.
As a pressurizing method, as shown in FIG. 6, the pressure may be continuously applied by the piston rod 41a, but the curvature changes with the progress of bending, and the contact surface between the pressurizing surface 32 and the design surface portion 2a moves. Therefore, it is better to pressurize intermittently.
The pressurizing interval differs depending on the bending speed and the width of the design surface part, and is set so as to pressurize immediately before the wrinkle is generated.
As shown in FIG. 4, the gentle bending of the pillar portion is performed by advancing the rod 16 a of the lap bending cylinder 16 and rotating the tension arm 15.

最小Ｒ部に相当する意匠面部２ａの幅２０ｍｍの押出形材に図９に示すように５ｍｍ間隔のケガキ線を入れ、曲げ加工による外側Ｒの外周長と内側Ｒの内周長寸法を測定し伸び率又は圧縮率を求めた。
また、曲げ加工時のテンションチャック１３に付加する荷重を曲率に応じて変化させ、そのときの荷重（ｋｇ）を記録した。なお、曲率が強くなるにつれて荷重を弱くした。
加圧手段４０によるピストンロッド４１ａの加圧は断続的に実施した。
このようにして外側最小Ｒ３０ｍｍ、曲げ角度９１度の曲げ加工製品を得た。
このときの外側Ｒの伸び率、内側Ｒの圧縮率、テンション荷重変化を図１０（ａ）のグラフに示す。
グラフにてｃ印は徐変曲げの中心を示す。
外側は最大で約６６％の伸び率となり、内側は最大で２８％の圧縮率になった。
また、この最大曲げ部でのケガキ線幅５ｍｍにおいて求めた外周長／内周長の値は２．３であった。
このようにして得られた曲げ加工製品の意匠面部には、亀裂、破断、しわ等の外観不具合は生じなかった。 As shown in FIG. 9, a marking line with an interval of 5 mm is put into an extruded shape member having a width of 20 mm of the design surface portion 2a corresponding to the minimum R portion, and the outer peripheral length of the outer R and the inner peripheral length of the inner R are measured by bending. The elongation or compression rate was determined.
Further, the load applied to the tension chuck 13 during bending was changed according to the curvature, and the load (kg) at that time was recorded. Note that the load was reduced as the curvature increased.
Pressurization of the piston rod 41a by the pressurizing means 40 was performed intermittently.
In this way, a bent product having an outer minimum R30 mm and a bending angle of 91 degrees was obtained.
The graph of FIG. 10A shows the elongation rate of the outer side R, the compression rate of the inner side R, and the tension load change at this time.
In the graph, c indicates the center of gradual bending.
The outer side has a maximum elongation of about 66% and the inner side has a maximum compression rate of 28%.
In addition, the value of the outer peripheral length / inner peripheral length obtained at a marking line width of 5 mm at the maximum bent portion was 2.3.
There were no appearance defects such as cracks, breaks and wrinkles in the design surface of the bent product thus obtained.

押出形材１の意匠面部２ａの幅３０ｍｍ、外側最小Ｒ５０ｍｍ、曲げ角度８６度の曲げ加工を実施し、実施例１と同様に測定した結果を図１０（ｂ）のグラフに示す。
最小曲げ部の外側は、最大で６０％の伸び率を示し、内側は最大で２５％の圧縮率となったが意匠面部２ａに亀裂やしわは発生しなかった。
このときの最大曲げ部でのケガキ５ｍｍ幅部分の外周長／内周長の値は２．１３であった。 The graph of FIG. 10B shows the measurement results obtained in the same manner as in Example 1 after bending the design surface portion 2a of the extruded profile 1 with a width of 30 mm, an outer minimum R50 mm, and a bending angle of 86 degrees.
The outer side of the minimum bent portion showed an elongation rate of 60% at the maximum, and the inner side had a compression rate of 25% at the maximum, but no cracks or wrinkles occurred in the design surface portion 2a.
At this time, the value of the outer peripheral length / inner peripheral length of the 5 mm wide portion of the marking at the maximum bent portion was 2.13.

（比較例）
意匠面部２ａの幅２０ｍｍのものをテンション荷重一定で且つ曲げ部の意匠面部２ａを加圧することなく、曲げ加工した結果を図８（ｃ）に示すように外側Ｒ７０ｍｍで外側に亀裂が発生した。そのときの曲げ角度は８１度であった。 (Comparative example)
As shown in FIG. 8C, a crack was generated on the outer side of the outer surface R70 mm as a result of bending the design surface portion 2a having a width of 20 mm with a constant tension load and without pressing the design surface portion 2a of the bent portion. The bending angle at that time was 81 degrees.

本発明においては、図８に示した曲げ角度がθ＝０〜１６０度の範囲で且つ、外周長／内周長（曲げ前５ｍｍ幅の部分）＝１．７〜３．４の範囲が可能であり、意匠面幅１０ｍｍ以上では曲げ角度が８０〜１５０度の範囲が好ましい。   In the present invention, the bending angle shown in FIG. 8 is in the range of θ = 0 to 160 degrees, and the outer peripheral length / inner peripheral length (the portion having a width of 5 mm before bending) = 1.7 to 3.4 is possible. When the design surface width is 10 mm or more, the bending angle is preferably in the range of 80 to 150 degrees.

本実施例では平面的な二次曲げ加工の例を示したが、ドアサッシュ等においては三次元に曲げることも可能であり、例えば特開２００６−２０５２２３号に開示の技術を取り込むことも可能である。   In this embodiment, an example of planar secondary bending is shown. However, it is possible to bend three-dimensionally in a door sash or the like. For example, it is possible to incorporate the technique disclosed in Japanese Patent Application Laid-Open No. 2006-205223. is there.

本発明に係る曲げ加工装置の平面図を示す。The top view of the bending apparatus which concerns on this invention is shown. アッパー部からコーナー部にかけて曲げる工程を示す。The process of bending from the upper part to the corner part is shown. コーナー部からピラー部にかけて曲げる工程を示す。The process of bending from a corner part to a pillar part is shown. ピラー部の曲げ工程を示す。The bending process of a pillar part is shown. 曲げ加工装置の側面図を示す。The side view of a bending apparatus is shown. ガイド部材付近の部分断面図を示す。The fragmentary sectional view near a guide member is shown. 押さえ部材部分の平面図を示す。The top view of a pressing member part is shown. 曲げ加工製品の例を示す。An example of a bent product is shown. 曲げ評価方法を示す。The bending evaluation method is shown. 曲げ部の評価結果を示す。The evaluation result of a bending part is shown.

符号の説明Explanation of symbols

１ 押出形材
２ 曲げ加工製品
２ａ 意匠面部
２ｂ 起立部
２ｃ 意匠面部の幅
１０ ロータリーベース
１１ 小Ｒ回転曲げ金型
１２ 大Ｒ曲げ金型
１３ テンションチャック
１４ テンションシリンダー
１５ テンションアーム
１６ ラップ曲げシリンダー
１７ 固定チャック
２０ ガイド部材押さえユニット
２４ 押さえ部材
２５ ローラー
３０ ガイド部材
４０ 加圧手段
４１ 加圧シリンダー DESCRIPTION OF SYMBOLS 1 Extrusion profile 2 Bending product 2a Design surface part 2b Standing part 2c Design surface part width 10 Rotary base 11 Small R rotation bending mold 12 Large R bending mold 13 Tension chuck 14 Tension cylinder 15 Tension arm 16 Lap bending cylinder 17 Fixed Chuck 20 Guide member pressing unit 24 Pressing member 25 Roller 30 Guide member 40 Pressure means 41 Pressure cylinder

Claims (9)

意匠面部と、意匠面部の裏面から起立する起立部を長手方向に有するアルミニウム合金の押出形材からなり、意匠面部の一の縁が内側Ｒ、他の縁が外側Ｒとなる曲げ加工製品であって、
外側最小Ｒ曲げ部がＲ７０未満であり且つ当該最小Ｒ曲げ部における意匠面部の幅１０ｍｍ以上、意匠面部の肉厚１〜５ｍｍの範囲であることを特徴とする曲げ加工製品。 It is a bent product that consists of an extruded shape of an aluminum alloy that has a design surface portion and an upright portion that erects from the back surface of the design surface portion in the longitudinal direction, and one edge of the design surface portion is the inside R and the other edge is the outside R. And
A bent product, wherein the outer minimum R-bend portion is less than R70, the width of the design surface portion of the minimum R-bend portion is 10 mm or more, and the thickness of the design surface portion is 1 to 5 mm. 最小Ｒ曲げ部の前後は曲げＲが大きくなるように徐変していて、全体の曲げ角度が１５０度以下であることを特徴とする請求項１記載の曲げ加工製品。   The bent product according to claim 1, wherein the bent portion is gradually changed before and after the minimum R-bending portion so that the bending R becomes large, and the entire bending angle is 150 degrees or less. 意匠面部と、意匠面部の裏面から起立する起立部を長手方向に有するアルミニウム合金の押出形材を、意匠面部の一の縁が内側Ｒ、他の縁が外側Ｒとなるように曲げる曲げ加工方法であって、起立部と意匠面部の裏面とを曲げ内側から回転曲げ金型で拘束しつつ、意匠面部の表面を加圧手段で連続的又は断続的に加圧しながら曲げることを特徴とする押出形材の曲げ加工方法。   A bending method of bending an extruded shape of an aluminum alloy having a design surface portion and an upright portion rising from the back surface of the design surface portion in the longitudinal direction so that one edge of the design surface portion is the inner side R and the other edge is the outer side R The extrusion is characterized in that the upright portion and the back surface of the design surface portion are bent from the inside with a rotating bending mold and the surface of the design surface portion is bent while being continuously or intermittently pressed by a pressurizing means. Bending method for profiles. 押出形材の長手方向に引張力を加えるとともに曲げの曲率変化に応じて引張力を調整しながら曲げることを特徴とする請求項３記載の押出形材の曲げ加工方法。   4. The method of bending an extruded shape according to claim 3, wherein the bending is performed while applying a tensile force in the longitudinal direction of the extruded shape and adjusting the tensile force in accordance with a bending curvature change. 意匠面部と、意匠面部の裏面から起立する起立部を長手方向に有するアルミニウム合金の押出形材を、意匠面部の一の縁が内側Ｒ、他の縁が外側Ｒとなるように曲げる加工装置であって、
曲げ内側から意匠面部の裏面と起立部を拘束する回転曲げ金型と、意匠面部の表面と起立部の外側を押さえるガイド部材とを備えるとともに、ガイド部材を曲げ外側から回転曲げ金型に向けて加圧するガイド部材押さえユニットと、ガイド部材を上から連続的又は断続的に加圧する加圧手段とを有し、ガイド部材押さえユニットとガイド部材とは回転曲げ金型の回転に同期して相対移動可能になっていることを特徴とする曲げ加工装置。 A processing device that bends an extruded shape of an aluminum alloy that has a design surface portion and an upright portion that stands up from the back surface of the design surface portion in the longitudinal direction so that one edge of the design surface portion is the inside R and the other edge is the outside R. There,
A rotating bending mold that restrains the back surface and standing part of the design surface part from the inside of the bending, and a guide member that presses the surface of the design surface part and the outside of the standing part, and the guide member is directed from the outside to the rotating bending mold. It has a guide member pressing unit that pressurizes and a pressing means that pressurizes the guide member continuously or intermittently from above, and the guide member pressing unit and the guide member move relative to each other in synchronization with the rotation of the rotating bending mold. A bending apparatus characterized by being made possible. 押出形材の長手方向に引張力を加えるとともに曲げの曲率変化に応じて引張力を調整するテンション手段を有していることを特徴とする請求項５記載の曲げ加工装置。   6. A bending apparatus according to claim 5, further comprising tension means for applying a tensile force in the longitudinal direction of the extruded profile and adjusting the tensile force in accordance with a bending curvature change. ガイド部材押さえユニットは、油圧又はエアーシリンダーからなる加圧手段を有していることを特徴とする請求項５又は６記載の曲げ加工装置。   The bending apparatus according to claim 5 or 6, wherein the guide member pressing unit has pressurizing means comprising a hydraulic or air cylinder. ガイド部材押さえユニットとガイド部材との相対移動は、ガイド部材押さえユニット側に設けたローラーによるものであることを特徴とする請求項５〜７のいずれかに記載の曲げ加工装置。   The bending apparatus according to claim 5, wherein the relative movement between the guide member pressing unit and the guide member is performed by a roller provided on the guide member pressing unit side. ガイド部材押さえユニットとガイド部材との相対移動はサーボ制御されたラック＆ピニオンであることを特徴とする請求項５〜７のいずれかに記載の曲げ加工装置。   The bending apparatus according to any one of claims 5 to 7, wherein the relative movement between the guide member pressing unit and the guide member is a servo-controlled rack and pinion.
JP2006354477A 2006-12-28 2006-12-28 Bending product, bending method and bending apparatus Expired - Fee Related JP5067783B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102366892A (en) * 2011-06-28 2012-03-07 吴江市精工铝字制造厂 Bending device for processing three-dimensional font
JP2013107107A (en) * 2011-11-21 2013-06-06 Kobe Steel Ltd Extruded shape made of aluminum alloy subjected to bending, and structural member with the same used as a part
JP2016073993A (en) * 2014-10-06 2016-05-12 株式会社日立製作所 Roll molding roll and roll molding method using the same

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JPS59169629A (en) * 1983-03-16 1984-09-25 Hitachi Ltd Method and apparatus for bending shape
JPH05212452A (en) * 1992-02-03 1993-08-24 Inoac Corp Method and device for bending molding
JP2006289488A (en) * 2005-03-14 2006-10-26 Jfe Steel Kk Pipe bending device, and pipe bending method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59169629A (en) * 1983-03-16 1984-09-25 Hitachi Ltd Method and apparatus for bending shape
JPH05212452A (en) * 1992-02-03 1993-08-24 Inoac Corp Method and device for bending molding
JP2006289488A (en) * 2005-03-14 2006-10-26 Jfe Steel Kk Pipe bending device, and pipe bending method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102366892A (en) * 2011-06-28 2012-03-07 吴江市精工铝字制造厂 Bending device for processing three-dimensional font
JP2013107107A (en) * 2011-11-21 2013-06-06 Kobe Steel Ltd Extruded shape made of aluminum alloy subjected to bending, and structural member with the same used as a part
JP2016073993A (en) * 2014-10-06 2016-05-12 株式会社日立製作所 Roll molding roll and roll molding method using the same

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