JP2015083311A - Flange bending device and bending method - Google Patents

Flange bending device and bending method Download PDF

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JP2015083311A
JP2015083311A JP2013221792A JP2013221792A JP2015083311A JP 2015083311 A JP2015083311 A JP 2015083311A JP 2013221792 A JP2013221792 A JP 2013221792A JP 2013221792 A JP2013221792 A JP 2013221792A JP 2015083311 A JP2015083311 A JP 2015083311A
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flange
hole
bending
contact
vehicle
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誠一 多田
Seiichi Tada
誠一 多田
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ダイハツ工業株式会社
Daihatsu Motor Co Ltd
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PROBLEM TO BE SOLVED: To perform bending with an outer peripheral flange without causing depression, which means an upper surface position of a through-hole falling beyond a specified position, relating to a structural member of a vehicle in which the through hole and an inside flange are formed by pressing with a metal plate, and after that, the outer peripheral flange is bent.SOLUTION: A lower arm 18 in almost L-shape is provided by pressing with a metal plate, with a through hole 40 and an inside flange 40a being trimmed, and is placed on a device body 51 of a processing device 50. In a state in which a through hole 40 is inserted in a boss part 52 to position the lower arm 40, a pressurizing part 55 is moved downward until an end face of an outer peripheral edge of the through hole 40 abuts with an upper surface of a regulation part 54, and an outer peripheral edge which means almost semi-circle portion of the through hole 40 is bent downward, forming an outer peripheral flange 40b.

Description

本発明は、金属板をプレス加工することにより、透孔、該透孔内周に筒状の内側フランジおよび該透孔の外周縁に外周フランジがそれぞれ形成されて成る車両の構造物材であって、外周フランジを内側フランジに沿うように曲げ加工するフランジ曲げ加工装置および曲げ加工方法に関する。   The present invention is a vehicle structural material in which a metal plate is pressed to form a through hole, a cylindrical inner flange on the inner periphery of the through hole, and an outer peripheral flange on the outer periphery of the through hole. The present invention relates to a flange bending apparatus and a bending method for bending an outer peripheral flange along an inner flange.
一般に、車両のサスペンション装置には、特許文献1,2に記載のようなロアアームと称される構造部材が設けられている。このロアアームは、金属板をプレス加工して略L字状に形成され、車体の前後方向に延びて前、後部枢支部材により車体に弾性的に枢支されるアーム基部と、このアーム基部から車体の外側方に向かって一体的に延出形成されその延出端部が車輪に接続されるアーム本体とを備える。   Generally, a suspension device for a vehicle is provided with a structural member called a lower arm as described in Patent Documents 1 and 2. The lower arm is formed in a substantially L shape by pressing a metal plate, extends in the front-rear direction of the vehicle body, and is elastically pivoted to the vehicle body by the front and rear pivot members, and from the arm base And an arm main body integrally extending toward the outer side of the vehicle body and having an extended end connected to the wheel.
具体的には、図6に示すように、ロアアーム100は、車体の前後方向のアーム基部100aと、アーム基部100aから車体の外側方に向かって延びるアーム本体100bとを備え、アーム基部100aの後端部が、車体前後方向に延びる揺動軸心回りに上下に揺動可能となるように後部枢支部材により車体に枢支されるとともに、アーム基部100aの後端部が、該後端部に形成された透孔110に前部枢支部材が装着されることにより上記した揺動軸心に直交する軸心で車体に枢支されるようになっている。なお、図6中のFrは車両の進行方向の前方を示す。   Specifically, as shown in FIG. 6, the lower arm 100 includes an arm base portion 100a in the front-rear direction of the vehicle body, and an arm body 100b extending from the arm base portion 100a toward the outer side of the vehicle body, and the rear of the arm base portion 100a. The end portion is pivotally supported on the vehicle body by a rear pivot member so that the end portion can swing up and down around a swing axis extending in the longitudinal direction of the vehicle body, and the rear end portion of the arm base portion 100a is connected to the rear end portion. The front pivot member is mounted in the through-hole 110 formed in the above structure so that it is pivotally supported on the vehicle body with an axis perpendicular to the above-described swing axis. Note that Fr in FIG. 6 indicates the front in the traveling direction of the vehicle.
特開2002−205520号公報(段落0014および図1、図2参照)JP 2002-205520 A (see paragraph 0014 and FIGS. 1 and 2) 特開2012−158200号公報(段落0031〜0035および図1〜図3参照)JP 2012-158200 A (see paragraphs 0031 to 0035 and FIGS. 1 to 3)
ところで、上記したアーム基部100aの前端部の透孔110には、例えば図7の断面図に示すように、内周に筒状の内側フランジ110aおよび該透孔110の外周縁に外周フランジ60bがそれぞれ一体形成され、アーム基部100aの外周フランジ110bは、透孔110および内側フランジ110aが加工された後の工程において、曲げ加工されることにより形成される。   By the way, in the through hole 110 at the front end portion of the arm base 100a, for example, as shown in the sectional view of FIG. 7, a cylindrical inner flange 110a is provided on the inner periphery, and an outer peripheral flange 60b is provided on the outer periphery of the through hole 110. The outer peripheral flange 110b of the arm base 100a is formed by bending in the process after the through hole 110 and the inner flange 110a are processed.
このとき、図8に示すように、透孔110の外周縁を図示しない押圧手段によって下方への押圧力Fを加えて外周縁を図7のように曲げることにより、外周フランジ110bを加工形成するが、その際内側フランジ110aと外周フランジ110bとの間隔が非常に狭いため、内側フランジ110aを下支えし難いことから、下支えなしの状態で内側フランジ110aの下端面よりも下方にまで押圧手段を押し下げ、透孔110の外周縁を折り曲げ加工するのが従来の曲げ方法である。   At this time, as shown in FIG. 8, the outer peripheral edge of the through hole 110 is bent by the pressing means F (not shown) and the outer peripheral edge is bent as shown in FIG. However, since the distance between the inner flange 110a and the outer peripheral flange 110b is very narrow at that time, it is difficult to support the inner flange 110a. Therefore, the pressing means is pushed down below the lower end surface of the inner flange 110a without supporting the inner flange 110a. In the conventional bending method, the outer peripheral edge of the through hole 110 is bent.
しかし、このような従来方法では、外周フランジ110bの曲げ加工の際に、透孔110の外周縁が必要以上に下方に引っ張られて内側フランジも一緒に引っ張られるため、加工後における透孔110の上端位置が、予め設計された規定位置よりも下方に落ち込む現象が生じ、ロアアーム100の意匠の低下や透孔110に装着される前部枢支部材の結合力の低下を招くという問題がある。なお、この種の問題は、ロアアーム100に限らず、金属板をプレス加工することにより、透孔および内側フランジが形成され、その後に外周フランジが曲げ加工される車両の構造部材であっても同様に生じ得る。   However, in such a conventional method, when the outer peripheral flange 110b is bent, the outer peripheral edge of the through hole 110 is pulled downward more than necessary, and the inner flange is also pulled together. There is a problem that a phenomenon occurs in which the upper end position falls below a predesigned specified position, resulting in a decrease in the design of the lower arm 100 and a decrease in the coupling force of the front pivot member attached to the through hole 110. This type of problem is not limited to the lower arm 100, and the same applies to a vehicle structural member in which a through hole and an inner flange are formed by pressing a metal plate, and then an outer peripheral flange is bent. Can occur.
本発明は、金属板をプレス加工することにより、透孔および内側フランジが形成され、その後に外周フランジが曲げ加工される車両の構造部材において、透孔の上面位置が規定位置よりも下がる落ち込みを生じることなく外周フランジを曲げ加工できるようにすることを目的とする。   According to the present invention, in the structural member of a vehicle in which a through hole and an inner flange are formed by pressing a metal plate, and then an outer peripheral flange is bent, the upper surface position of the through hole falls below a specified position. The object is to be able to bend the outer peripheral flange without causing it.
上記した目的を達成するために、本発明のフランジ曲げ加工装置は、金属板をプレス加工することにより、透孔、該透孔内周に筒状の内側フランジおよび該透孔の外周縁に外周フランジがそれぞれ形成されて成る車両の構造物材であって、前記外周フランジを前記内側フランジに沿うように曲げ加工するフランジ曲げ加工装置において、前記透孔に嵌挿されるボス部と、前記ボス部に前記透孔を嵌挿した状態で前記内側フランジの下端に当接配置される当接部と、その上面が前記当接部の上面よりも上方に位置して前記当接部の外周に配設された規制部と、前記内側フランジの下端に前記当接部が当接した状態で前記透孔の外周縁を該外周縁の端面が前記規制部に当接するまで下向きに押圧して前記外周フランジを曲げる押圧部とを備えることを特徴としている(請求項1)。   In order to achieve the above-described object, the flange bending apparatus of the present invention presses a metal plate to form a through hole, a cylindrical inner flange on the inner periphery of the through hole, and an outer periphery on the outer peripheral edge of the through hole. In the flange bending apparatus for bending the outer peripheral flange so as to be along the inner flange, a boss portion fitted into the through hole, and the boss portion, which are vehicle structural members each formed with a flange A contact portion that is disposed in contact with the lower end of the inner flange with the through-hole inserted therein, and an upper surface thereof is located above the upper surface of the contact portion and is arranged on the outer periphery of the contact portion. The outer peripheral edge of the through-hole is pressed downward until the end surface of the outer peripheral edge comes into contact with the restriction portion in a state where the contact portion is in contact with the lower end of the inner flange. A pressing part that bends the flange. It is characterized in (Claim 1).
また、前記構造物材は、車体の前後方向に延びる揺動軸心回りに上下に揺動可能となるよう車体に枢支され、その揺動端部に車輪を支持するものであって、前記透孔に装着される枢支部材により前記揺動軸心に直交する軸心で車体に枢支されるロアアームであるとよい(請求項2)。   The structural material is pivotally supported by the vehicle body so as to be able to swing up and down around a swing axis extending in the front-rear direction of the vehicle body, and supports a wheel at a swing end portion thereof. Preferably, the lower arm is pivotally supported on the vehicle body with an axis perpendicular to the pivot axis by a pivotal support member attached to the through hole.
また、本発明のフランジ曲げ加工方法は、金属板をプレス加工することにより、透孔、該透孔内周に筒状の内側フランジおよび該透孔の外周縁に外周フランジがそれぞれ形成されて成る車両の構造物材であって、前記外周フランジを前記内側フランジに沿うように曲げ加工するフランジ曲げ加工方法において、前記透孔に曲げ加工装置のボス部を嵌挿した状態で、前記内側フランジの下端に前記加工装置の当接部を当接配置し、前記内側フランジの下端に前記当接部が当接した状態で、前記当接部の上面よりも上方に位置する前記加工装置の規制部の上面に前記透孔の外周縁の端面が当接するまで、前記加工装置の押圧部により前記外周縁を下向きに押圧して前記外周フランジを曲げ加工することを特徴としている(請求項3)。   In the flange bending method of the present invention, a metal plate is pressed to form a through hole, a cylindrical inner flange on the inner periphery of the through hole, and an outer peripheral flange on the outer peripheral edge of the through hole. In a flange bending method for bending a circumferential structure of the outer peripheral flange along the inner flange, a boss portion of a bending apparatus is inserted into the through hole. A restricting portion of the processing device positioned above the upper surface of the contact portion in a state where the contact portion of the processing device is in contact with the lower end and the contact portion is in contact with the lower end of the inner flange. The outer peripheral flange is bent by pressing the outer peripheral edge downward by the pressing portion of the processing device until the end surface of the outer peripheral edge of the through hole comes into contact with the upper surface of the outer peripheral surface (Claim 3).
請求項1,3に係る発明によれば、透孔に曲げ加工装置のボス部を嵌挿した状態で、前記内側フランジの下端に加工装置の当接部を当接配置し、内側フランジの下端に当接部が当接した状態で、当接部の上面よりも上方に位置する加工装置の規制部の上面に透孔の外周縁の端面が当接するまで、加工装置の押圧部により外周縁を下向きに押圧して外周フランジを曲げ加工するため、透孔の外周縁を押圧しても、従来のように内側フランジが必要以上に引っ張られることがなく、構造部材の意匠の低下等を招くことを防止できる。   According to the first and third aspects of the invention, in a state where the boss portion of the bending device is fitted into the through hole, the contact portion of the processing device is disposed in contact with the lower end of the inner flange, and the lower end of the inner flange is provided. In the state where the contact portion is in contact with the outer peripheral edge, the pressing portion of the processing device keeps the outer peripheral edge until the end surface of the outer peripheral edge of the through hole contacts the upper surface of the restricting portion of the processing device positioned above the upper surface of the contact portion. Since the outer peripheral flange is bent by pressing it downward, the inner flange is not pulled more than necessary even if the outer peripheral edge of the through hole is pressed, leading to a decrease in the design of the structural member, etc. Can be prevented.
また、請求項2に係る発明によれば、構造部材がロアアームである場合に、ロアアームの意匠の低下を防止できると同時に、ロアアームの透孔に装着される枢支部材の結合力の低下も防止することができ、ロアアームの固定強度の向上を図ることができる。   According to the invention of claim 2, when the structural member is a lower arm, the design of the lower arm can be prevented from being lowered, and at the same time, the coupling force of the pivot member attached to the through hole of the lower arm is prevented from being lowered. It is possible to improve the fixing strength of the lower arm.
本発明の一実施形態により形成されるロアアームを使用した車両の概略平面図である。1 is a schematic plan view of a vehicle using a lower arm formed according to an embodiment of the present invention. 図1の一部の詳細図である。FIG. 2 is a detailed view of a part of FIG. 1. 図1の異なる一部の正面図である。It is a front view of a part of FIG. 1 different. 図1のロアアームの一部を示し、(a)は斜視図、(b)は(a)のX−X線における断面図である。1A and 1B show a part of the lower arm of FIG. 1, in which FIG. 1A is a perspective view, and FIG. 本発明に係るフランジ曲げ加工装置の一実施形態の概略正面図である。It is a schematic front view of one Embodiment of the flange bending apparatus which concerns on this invention. 従来のロアアームの斜視図である。It is a perspective view of the conventional lower arm. 図6の一部の断面図である。FIG. 7 is a partial cross-sectional view of FIG. 6. 図7の加工前の状態の図である。It is a figure of the state before the process of FIG.
本発明を車両の構造部材であるロアアームの加工に適用した場合の一実施形態について、図1ないし図5を参照して詳細に説明する。   An embodiment in which the present invention is applied to machining of a lower arm, which is a structural member of a vehicle, will be described in detail with reference to FIGS.
図1、図2に示すように、車両1は、その内部が車室とされる車体2と、この車体2の前部に左、右前車輪3をそれぞれ懸架させる懸架装置4と、車体2に支持され各車輪3を走行駆動するエンジン5とを備え、車体2の前部は、各車輪3と懸架装置4とによって走行面上に支持されている。なお、図1,2中のFrは車両の進行方向の前方を示す。   As shown in FIGS. 1 and 2, the vehicle 1 includes a vehicle body 2 in which the interior is a cabin, a suspension device 4 that suspends left and right front wheels 3 on the front portion of the vehicle body 2, and a vehicle body 2. The engine 5 is supported and driven to drive each wheel 3, and the front portion of the vehicle body 2 is supported on the traveling surface by the wheels 3 and the suspension device 4. In addition, Fr in FIGS. 1 and 2 indicates the front in the traveling direction of the vehicle.
車体2の前部は、その下部を構成する車体フレーム8と、この車体フレーム8の下側に配置されてこの車体フレーム8に強固に支持されるサブフレーム9と、車体2の上部を構成し車体フレーム8に支持される板金製の車体本体10とを備える。この車体本体10は、左右の側壁の下端縁部を構成してそれぞれ前後方向に延びるロッカ12と、各ロッカ12の前後方向の途中を下方に向かって開くよう切り欠いて形成され車輪3の上半分を収容するホイールハウス13と、このホイールハウス13の上方に位置して形成されるサスペンションタワー14とを備える。   The front portion of the vehicle body 2 constitutes a vehicle body frame 8 constituting the lower portion thereof, a subframe 9 disposed below the vehicle body frame 8 and firmly supported by the vehicle body frame 8, and an upper portion of the vehicle body 2. A sheet metal body body 10 supported by the body frame 8. The vehicle body 10 is formed with a rocker 12 that forms the lower edge of the left and right side walls and extends in the front-rear direction, and is cut out so as to open the middle of the rocker 12 in the front-rear direction downward. A wheel house 13 that accommodates the half and a suspension tower 14 that is formed above the wheel house 13 are provided.
このように、車体フレーム8、サブフレーム9、ロッカ12およびサスペンションタワー14は、車体2の骨格部材を構成し、十分の強度と剛性とを有するよう設計されている。   As described above, the vehicle body frame 8, the sub frame 9, the rocker 12, and the suspension tower 14 constitute a skeleton member of the vehicle body 2 and are designed to have sufficient strength and rigidity.
ところで、懸架装置4は、特に図3に示すように、車体2の前後方向に延びる揺動軸心16回りに上下に揺動可能となるようサブフレーム9の側部に枢支され、その揺動端部にステアリングナックル17を介して車輪3を支持する本発明における車両構造部材である略L字状のロアアーム18と、上下方向に伸縮自在とされてステアリングナックル17をサスペンションタワー14に支持する油圧シリンダ式等の緩衝器19とを備えている。   Incidentally, as shown in FIG. 3 in particular, the suspension device 4 is pivotally supported on the side portion of the subframe 9 so as to be swingable up and down around the swing axis 16 extending in the front-rear direction of the vehicle body 2. A substantially L-shaped lower arm 18 which is a vehicle structural member in the present invention that supports the wheel 3 via the steering knuckle 17 at the moving end portion, and the steering knuckle 17 is supported on the suspension tower 14 by being vertically extendable. And a shock absorber 19 such as a hydraulic cylinder type.
そして、ロアアーム18は、金属板をプレス加工して形成され、車体2の前後方向に延びて前部および後部枢支部材22,23によりサブフレーム9に弾性的に枢支されるアーム基部26と、このアーム基部26の前端部から車体2の外側方に向かって一体的に延出するアーム本体27とを備え、アーム本体27の延出端部にはボールジョイント28が装着され、このボールジョイント28がステアリングナックル17に接合されることにより、アーム本体27の延出端部が車輪3に接続されている。なお、アーム本体27は、アーム基部26の前後方向の中途部から車体2の外側方に向かって一体的に突出するものであってもよい。   The lower arm 18 is formed by pressing a metal plate. The lower arm 18 extends in the front-rear direction of the vehicle body 2 and is elastically supported on the subframe 9 by the front and rear pivot members 22 and 23. And an arm body 27 integrally extending from the front end portion of the arm base portion 26 toward the outer side of the vehicle body 2, and a ball joint 28 is attached to the extending end portion of the arm body 27. By joining 28 to the steering knuckle 17, the extending end of the arm body 27 is connected to the wheel 3. The arm main body 27 may integrally project from the middle part of the arm base 26 in the front-rear direction toward the outer side of the vehicle body 2.
前部枢支部材22は、上記した揺動軸心16上に配置される締結ボルト29と、サブフレーム9の前側部に揺動軸心16上で締結ボルト29により前、後両端が支持される支持パイプと、この支持パイプに外嵌されるゴム製の弾性ブッシュ30とを備えており、支持パイプに対し弾性ブッシュ30を介してアーム基部26の前端部が弾性的に枢支される。このとき、弾性ブッシュ30はアーム基部26の前端部と支持パイプとにそれぞれ加硫接着されている。   The front pivot member 22 is supported at both front and rear ends by the fastening bolt 29 disposed on the swing axis 16 and the fastening bolt 29 on the swing axis 16 on the front side of the subframe 9. And a rubber elastic bush 30 fitted on the support pipe. The front end of the arm base portion 26 is elastically pivoted to the support pipe via the elastic bush 30. At this time, the elastic bush 30 is vulcanized and bonded to the front end of the arm base 26 and the support pipe.
また、後部枢支部材23は、揺動軸心16に直交して上下方向に延びる軸心34上に配置されるボルト35と、サブフレーム9の後側部に軸心34でボルト35により上、下両端が支持される支持パイプ36と、この支持パイプ36に外嵌されるゴム製の弾性ブッシュ37とを備えている。そして、支持パイプ36に対し弾性ブッシュ37を介してアーム基部26の後端部が弾性的に枢支される。このとき、弾性ブッシュ37はアーム基部26の後端部と支持パイプ36とにそれぞれ加硫接着されている。   In addition, the rear pivot member 23 includes a bolt 35 disposed on an axis 34 that extends in a vertical direction perpendicular to the pivot axis 16, and a bolt 35 at the axis 34 on the rear side of the subframe 9. A support pipe 36 supported at both lower ends, and a rubber elastic bush 37 that is fitted onto the support pipe 36 are provided. The rear end portion of the arm base portion 26 is elastically pivoted with respect to the support pipe 36 via the elastic bush 37. At this time, the elastic bush 37 is vulcanized and bonded to the rear end portion of the arm base portion 26 and the support pipe 36.
ところで、アーム基部26の後部枢支部材23の取付け箇所は、図4に示すように、従来と同様、円形の透孔40と、透孔40の内周に形成された円筒状の内側フランジ40aと、透孔40の外周縁を折り曲げ加工して形成される外周フランジ40bとを備えており、外周フランジ40bは、透孔40および内側フランジ40aがトリム加工された後に、図5に示すような曲げ加工装置50により形成される。   By the way, as shown in FIG. 4, the mounting location of the rear pivot member 23 of the arm base 26 is a circular through hole 40 and a cylindrical inner flange 40a formed on the inner periphery of the through hole 40, as in the prior art. And an outer peripheral flange 40b formed by bending the outer peripheral edge of the through hole 40. The outer peripheral flange 40b is formed after the through hole 40 and the inner flange 40a are trimmed, as shown in FIG. It is formed by the bending apparatus 50.
この曲げ加工装置50は、図5に示すように、装置本体51の凹部51a内にボルト51bにより固定された台座部51cに取付けられてロアアーム18の透孔40が嵌挿されるボス部52と、台座部51cの上面に配設されボス部52にロアアーム18の透孔40を嵌挿した状態で内側フランジ40aの下端に当接配置される円板状の当接部53と、装置本体51に一体形成され、その上面が当接部53の上面よりも上方に位置して当接部53の外周に配設された規制部54と、内側フランジ40aの下端に当接部53が当接した状態で透孔40の外周縁を該外周縁の端面が規制部54に当接するまで下向き(図5中の矢印方向)に押圧して外周フランジ40bを曲げる押圧部55とを備える。   As shown in FIG. 5, the bending apparatus 50 is attached to a pedestal 51 c fixed by a bolt 51 b in a recess 51 a of the apparatus main body 51, and a boss part 52 into which the through hole 40 of the lower arm 18 is fitted, A disk-shaped contact portion 53 disposed on the upper surface of the pedestal portion 51 c and disposed in contact with the lower end of the inner flange 40 a in a state where the through hole 40 of the lower arm 18 is fitted in the boss portion 52, and the apparatus main body 51. The contact portion 53 is in contact with the lower end of the inner flange 40a and the regulating portion 54 that is integrally formed and whose upper surface is located above the upper surface of the contact portion 53 and is disposed on the outer periphery of the contact portion 53. In this state, the outer peripheral edge of the through hole 40 is pressed downward (in the direction of the arrow in FIG. 5) until the end surface of the outer peripheral edge abuts against the restricting portion 54, and a pressing portion 55 that bends the outer peripheral flange 40b is provided.
そして、金属板がプレス加工され、さらに透孔40および内側フランジ40aがトリム加工された略L字状のロアアーム18が、上記した加工装置50の装置本体51上に載置され、ボス部52に透孔40が嵌挿されてロアアーム40が位置決めされた状態で、規制部54の上面に透孔40の外周縁の端面が当接するまで押圧部55が下動されることにより、透孔40の略半円部分にあたる外周縁が下方に折り曲げられ、外周フランジ40bが形成される。   Then, the substantially L-shaped lower arm 18 in which the metal plate is pressed and the through hole 40 and the inner flange 40 a are trimmed is placed on the apparatus main body 51 of the above-described processing apparatus 50. In a state where the through-hole 40 is inserted and the lower arm 40 is positioned, the pressing portion 55 is moved downward until the end surface of the outer peripheral edge of the through-hole 40 comes into contact with the upper surface of the restricting portion 54. The outer peripheral edge corresponding to the substantially semicircular portion is bent downward to form the outer peripheral flange 40b.
このとき、押圧部55を下動する際には、当接部53が内側フランジ40aの下端面に当接しているため、押圧部55を内側フランジ40aの下端よりも下方にまで下動させなくても、図5に示すように規制部54の上面よりも少し(例えば、1mm程度)上方の位置まで押圧部55を下動させるだけで、内側フランジ40aが下方に引っ張られることなく、透孔40の外周縁を折り曲げて外周フランジ40bを形成することができる。   At this time, when the pressing portion 55 is moved downward, since the contact portion 53 is in contact with the lower end surface of the inner flange 40a, the pressing portion 55 is not moved downward below the lower end of the inner flange 40a. However, as shown in FIG. 5, the inner flange 40a is not pulled downward by simply moving the pressing portion 55 down to a position slightly above the upper surface of the restricting portion 54 (for example, about 1 mm). The outer peripheral edge of 40 can be bent to form the outer peripheral flange 40b.
したがって、上記した実施形態によれば、ロアアーム18の透孔40に曲げ加工装置50のボス部52を嵌挿した状態で、内側フランジ40aの下端に当接部53が当接するようにし、内側フランジ40aの下端に当接部53が当接した状態で、当接部53の上面よりも上方に位置する規制部54の上面に透孔40の外周縁の端面が当接するまで、押圧部55により透孔45の外周縁を下向きに押圧して外周フランジ40bを曲げ加工するため、透孔40の外周縁を押圧しても、従来のように内側フランジ40aが必要以上に引っ張られて内側フランジ40aの上下寸法が規定値よりも小さくなることを防止できる。   Therefore, according to the above-described embodiment, the abutting portion 53 abuts on the lower end of the inner flange 40a in a state where the boss portion 52 of the bending apparatus 50 is fitted in the through hole 40 of the lower arm 18, and the inner flange In a state where the contact portion 53 is in contact with the lower end of 40a, the pressing portion 55 causes the end surface of the outer peripheral edge of the through hole 40 to contact the upper surface of the restriction portion 54 positioned above the upper surface of the contact portion 53. Since the outer peripheral edge of the through hole 45 is pressed downward to bend the outer peripheral flange 40b, even if the outer peripheral edge of the through hole 40 is pressed, the inner flange 40a is pulled more than necessary as in the prior art. Can be prevented from becoming smaller than the prescribed value.
その結果、ロアアーム18の意匠の低下を防止することができるとともに、弾性ブッシュ37の結合力の低下を防止してロアアーム18をサブフレーム9に強固に結合することができる。   As a result, the design of the lower arm 18 can be prevented from being lowered, and the lower arm 18 can be firmly coupled to the subframe 9 by preventing the coupling force of the elastic bush 37 from being lowered.
なお、本発明は上記した実施形態に限定されるものではなく、その趣旨を逸脱しない限りにおいて上述したもの以外に種々の変更を行なうことが可能である。   The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention.
例えば、上記した実施形態では、車両の構造物材をロアアーム18とし、このロアアーム18の透孔40における外周フランジ40bの曲げ加工に、本発明を適用した場合について説明したが、ロアアーム18に限らず、金属板をプレス加工することにより、透孔および内側フランジが形成され、その後に外周フランジが曲げ加工される車両の構造部材についても、本発明を同様に適用することができる。   For example, in the above-described embodiment, the case where the vehicle structural material is the lower arm 18 and the present invention is applied to the bending of the outer peripheral flange 40b in the through hole 40 of the lower arm 18 has been described. However, the present invention is not limited to the lower arm 18. The present invention can be similarly applied to a structural member of a vehicle in which a through hole and an inner flange are formed by pressing a metal plate, and then an outer peripheral flange is bent.
1 …車両
18 …ロアアーム(車両の構造部材)
40 …透孔
40a …内側フランジ
40b …外周フランジ
50 …曲げ加工装置
52 …ボス部
53 …当接部
54 …規制部
55 …押圧部
1 ... Vehicle 18 ... Lower arm (vehicle structural member)
DESCRIPTION OF SYMBOLS 40 ... Through-hole 40a ... Inner flange 40b ... Outer peripheral flange 50 ... Bending apparatus 52 ... Boss part 53 ... Contact part 54 ... Restriction part 55 ... Pressing part

Claims (3)

  1. 金属板をプレス加工することにより、透孔、該透孔内周に筒状の内側フランジおよび該透孔の外周縁に外周フランジがそれぞれ形成されて成る車両の構造物材であって、前記外周フランジを前記内側フランジに沿うように曲げ加工するフランジ曲げ加工装置において、
    前記透孔に嵌挿されるボス部と、
    前記ボス部に前記透孔を嵌挿した状態で前記内側フランジの下端に当接配置される当接部と、
    その上面が前記当接部の上面よりも上方に位置して前記当接部の外周に配設された規制部と、
    前記内側フランジの下端に前記当接部が当接した状態で前記透孔の外周縁を該外周縁の端面が前記規制部に当接するまで下向きに押圧して前記外周フランジを曲げる押圧部と
    を備えることを特徴とするフランジ曲げ加工装置。
    By pressing a metal plate, a vehicle structure material is formed by forming a through hole, a cylindrical inner flange on the inner periphery of the through hole, and an outer peripheral flange on the outer peripheral edge of the through hole. In a flange bending apparatus for bending a flange along the inner flange,
    A boss part to be inserted into the through hole;
    An abutting portion arranged to abut on a lower end of the inner flange in a state where the through hole is inserted into the boss portion;
    A regulating portion whose upper surface is located above the upper surface of the abutting portion and disposed on the outer periphery of the abutting portion;
    A pressing portion that bends the outer peripheral flange by pressing the outer peripheral edge of the through-hole downward until the end surface of the outer peripheral contact comes into contact with the restricting portion in a state in which the contact portion is in contact with the lower end of the inner flange. A flange bending apparatus characterized by comprising:
  2. 前記構造物材は、車体の前後方向に延びる揺動軸心回りに上下に揺動可能となるよう車体に枢支され、その揺動端部に車輪を支持するものであって、前記透孔に装着される枢支部材により前記揺動軸心に直交する軸心で車体に枢支されるロアアームであることを特徴とする請求項1に記載のフランジ曲げ加工装置。   The structural member is pivotally supported by the vehicle body so as to be able to swing up and down around a swing axis extending in the front-rear direction of the vehicle body, and supports a wheel at a swing end portion thereof. The flange bending apparatus according to claim 1, wherein the flange bending apparatus is a lower arm pivotally supported on a vehicle body by an axis orthogonal to the pivot axis by a pivotal support member attached to the body.
  3. 金属板をプレス加工することにより、透孔、該透孔内周に筒状の内側フランジおよび該透孔の外周縁に外周フランジがそれぞれ形成されて成る車両の構造物材であって、前記外周フランジを前記内側フランジに沿うように曲げ加工するフランジ曲げ加工方法において、
    前記透孔に曲げ加工装置のボス部を嵌挿した状態で、前記内側フランジの下端に前記加工装置の当接部を当接配置し、前記内側フランジの下端に前記当接部が当接した状態で、前記当接部の上面よりも上方に位置する前記加工装置の規制部の上面に前記透孔の外周縁の端面が当接するまで、前記加工装置の押圧部により前記外周縁を下向きに押圧して前記外周フランジを曲げ加工する
    ことを特徴とするフランジ曲げ加工方法。
    By pressing a metal plate, a vehicle structure material is formed by forming a through hole, a cylindrical inner flange on the inner periphery of the through hole, and an outer peripheral flange on the outer peripheral edge of the through hole. In a flange bending method for bending a flange along the inner flange,
    With the boss portion of the bending device inserted in the through hole, the contact portion of the processing device is in contact with the lower end of the inner flange, and the contact portion is in contact with the lower end of the inner flange. In this state, the outer peripheral edge of the through hole is made downward by the pressing portion of the processing device until the end surface of the outer peripheral edge of the through hole contacts the upper surface of the restricting portion of the processing device located above the upper surface of the contact portion. A flange bending method characterized by bending the outer peripheral flange by pressing.
JP2013221792A 2013-10-25 2013-10-25 Flange bending device and bending method Pending JP2015083311A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63122716U (en) * 1987-01-27 1988-08-10
JPH01143620U (en) * 1988-03-29 1989-10-02
JPH05228557A (en) * 1992-02-17 1993-09-07 Toyota Motor Corp Hemming device
JPH10156481A (en) * 1996-11-21 1998-06-16 Sango Co Ltd Integral structure of plate material and cylindrical body and manufacture thereof
JP2002205520A (en) * 2001-01-12 2002-07-23 Honda Motor Co Ltd Suspension arm

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63122716U (en) * 1987-01-27 1988-08-10
JPH01143620U (en) * 1988-03-29 1989-10-02
JPH05228557A (en) * 1992-02-17 1993-09-07 Toyota Motor Corp Hemming device
JPH10156481A (en) * 1996-11-21 1998-06-16 Sango Co Ltd Integral structure of plate material and cylindrical body and manufacture thereof
JP2002205520A (en) * 2001-01-12 2002-07-23 Honda Motor Co Ltd Suspension arm

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