JP2013013934A - Method for manufacturing metal component with three-dimensional edge - Google Patents

Method for manufacturing metal component with three-dimensional edge Download PDF

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JP2013013934A
JP2013013934A JP2012071367A JP2012071367A JP2013013934A JP 2013013934 A JP2013013934 A JP 2013013934A JP 2012071367 A JP2012071367 A JP 2012071367A JP 2012071367 A JP2012071367 A JP 2012071367A JP 2013013934 A JP2013013934 A JP 2013013934A
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edge
blank
bent
manufacturing
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JP5888048B2 (en
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Kinya Nakagawa
欣哉 中川
Yuji Yamazaki
雄司 山▲崎▼
Toyohisa Shingu
豊久 新宮
Yusuke Fujii
祐輔 藤井
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JFE Steel Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a metal component with a three-dimensional edge without cracking and wrinkles from a high-strength metal blank by a simple forming process.SOLUTION: The method includes: a folding shape applying process for applying a fold line of either a mountain fold or a valley fold (a mountain-fold line 4 or a valley-fold line) along a curve to a curved edge part 3; and a three-dimensional forming process for three-dimensionally forming the curved edge part 3 with the fold line as a starting point by moving a portion of the blank 10 at both ends 1, 2 of the curved edge part 3 so that an interval of both the ends is narrowed or widened.

Description

本発明は、立体縁付き金属部品の製造方法に関し、詳しくは、金属板(例えば引張強さ(TS)が590MPa以上の高強度鋼板)のブランクに設けた曲線状の縁部あるいはさらにこれに隣接するブランク部分を成形加工により立体化して立体縁付き金属部品となす、立体縁付き金属部品の製造方法に関する。ここで、前記立体縁における立体は、縦壁、山形、あるいはこれらの一方に他方が連なる立体である。又、ブランクとは、成形加工用の素材であって、原板から切り出され、該切り出しの際、前記成形加工後の立体形状に対応した平面輪郭形状を付与された単一平板である。   The present invention relates to a method of manufacturing a metal part with a three-dimensional edge, and more specifically, a curved edge provided on a blank of a metal plate (for example, a high-strength steel plate having a tensile strength (TS) of 590 MPa or more) or further adjacent thereto. The present invention relates to a method of manufacturing a metal part with a three-dimensional border, in which a blank part is three-dimensionalized by forming to form a metal part with a three-dimensional border. Here, the solid at the three-dimensional edge is a vertical wall, a mountain shape, or a solid in which one of them is connected to the other. The blank is a raw material for forming, and is a single flat plate cut out from an original plate and provided with a planar contour shape corresponding to the three-dimensional shape after the forming process.

曲がり縁に立体例えば縦壁をもつ金属部品を得る手段として、従来、金属単板に曲げ、絞り、伸びフランジの各種成形様式を複合したプレス成形(以降、従来プレス成形という)が行われており、寸法精度を得るための方法として縦壁部に末広がり状の段差を設ける方法(特許文献1)や、フランジ部を二段階に分けて成形する方法(特許文献2)が提案され、ねじれを防止する方法として二段階に分けて曲げ成形を行う方法(特許文献3)や、縦壁部に応力を付与する方法(特許文献4)が提案されている。   Conventionally, as a means to obtain a metal part with a three-dimensional vertical wall, for example, at the bent edge, press molding (hereinafter referred to as conventional press molding) in which various forms of bending, drawing, and stretch flange are combined with a single metal plate has been performed. As a method for obtaining dimensional accuracy, a method of providing a stepped shape at the end of the vertical wall (Patent Document 1) and a method of forming the flange part in two stages (Patent Document 2) have been proposed to prevent twisting. As a method for this, a method of performing bending molding in two stages (Patent Document 3) and a method of applying stress to a vertical wall (Patent Document 4) have been proposed.

特開2010−5651号公報JP 2010-5651 A 特開2006−289480号公報JP 2006-289480 A 特開2009−241109号公報JP 2009-241109 A 特開2006−305627号公報JP 2006-305627 A

軽量化の要請に応じた鋼板の高強度化は、同時に鋼板の絞り、張出し、伸びフランジ成形性の低下を招く。高強度鋼板のブランクを成形加工して、縁に立体例えば縦壁をもつ部品を製造する場合、縁部が直線状であれば曲げ加工にて縦壁に成形することが可能であるが、縁部が曲線状のときは、通常のプレス成形(伸びフランジ成形、あるいは絞り成形)にて縦壁に成形しようとすると、縦壁部にする縁部領域のブランク縁側境界曲線と被折り曲げ部側境界曲線とで線長が異なることから、伸びフランジ成形を行った場合にはわれが発生し、絞り成形を行った場合にはしわが発生してしまう。このとき、しわ押さえ等の成形条件の最適化あるいは部品形状変更により、ある程度までわれ、しわの発生抑制を図ることは可能であるが、そのような方法では、軽量化ニーズに応えるための、例えばTSで980MPa以上のさらなる高強度化に対応するには限界があると言える。   Increasing the strength of steel sheets in response to demands for weight reduction leads to a reduction in steel sheet drawing, overhanging, and stretch flangeability. When a high-strength steel sheet blank is formed and a part with a solid wall, for example a vertical wall, is produced, if the edge is straight, it can be formed into a vertical wall by bending. When the part is curved, if you try to form a vertical wall by normal press molding (stretch flange molding or draw molding), the blank edge side boundary curve and the bent part side boundary of the edge region to be the vertical wall part Since the line length differs from the curve, cracks occur when stretch flange molding is performed, and wrinkles occur when draw molding is performed. At this time, by optimizing the molding conditions such as wrinkle pressing or changing the part shape, it is possible to suppress the generation of wrinkles to a certain extent, but such a method can be used to meet the need for weight reduction, for example, It can be said that there is a limit to cope with further increase in strength of 980 MPa or more in TS.

また、二段階に分けて成形する、縦壁部に段差を設ける、縦壁部に応力を付与する等の方法ではいずれも工程が増える、歩留まりが落ちる等の問題があり、さらには前記縦壁部のわれ、しわは、縦壁部にする縁部領域のブランク縁側境界曲線と被折り曲げ部側境界曲線との線長差に起因しているため、われ、しわの対策にはなりえない。
すなわち、上記従来プレス成形にて曲がり縁部を立体化する立体縁付き金属部品の製造方法では、ブランクが高強度鋼板である場合、単純な工程ではわれ、しわが生じて立体縁付き金属部品の目標形状を達成することができず、工程簡素化と製品軽量化との両立は極めて困難であるという課題があった。
In addition, there are problems such as forming in two stages, providing a step in the vertical wall portion, applying stress to the vertical wall portion, etc., and there are problems such as an increase in processes and a decrease in yield. Since the cracks and wrinkles are caused by the line length difference between the blank edge side boundary curve and the bent portion side boundary curve of the edge region to be the vertical wall, it cannot be a countermeasure against cracks and wrinkles.
That is, in the manufacturing method of the solid edged metal part that three-dimensionalizes the bent edge by the conventional press forming, when the blank is a high-strength steel plate, it is broken in a simple process, and wrinkles are generated and the target shape of the solid edged metal part is formed. There is a problem that it is extremely difficult to achieve both process simplification and product weight reduction.

発明者らは上記課題を解決する手段を検討し、折り紙をヒントに、次の知見を得た。すなわち、紙は伸びも縮みもしない素材であるが、簡素な折り方によって紙ブランク縁部に曲がった稜線をもつ立体を形成することができる。その折り方を金属ブランクに適用することにより、被加工材は絞り、張出し、伸びフランジの各変形をほとんどすることなく曲げ変形するため、簡素な成形工程で高強度金属ブランクから、われ、しわのない立体縁付き金属部品を製造することが可能となる。   The inventors studied means for solving the above-mentioned problems, and obtained the following knowledge using origami as a hint. That is, although paper is a material that does not stretch or shrink, a solid body having a curved ridgeline at the edge of the paper blank can be formed by a simple folding method. By applying the folding method to the metal blank, the work material is bent and deformed with little deformation of the drawing, overhanging, and stretch flange. It is possible to produce metal parts with no solid edges.

本発明は上記知見に基づいてなされたものであり、その要旨は以下のとおりである。
(1) 金属板から切り出した、両端をもつ曲線状の曲がり縁部を有するブランクを素材とし、前記曲がり縁部あるいはさらに該曲がり縁部に隣接するブランク部分を立体に成形して立体縁付き金属部品を得る、立体縁付き金属部品の製造方法であって、
前記曲がり縁部に、該曲がり縁部の曲がりに沿った山折れ又は谷折れいずれかの折れ形線を付与する折れ形付与工程と、
次いで、前記曲がり縁部の両端側のブランク部位を、該両端の間隔が狭まるかあるいは広がるように動かすことにより、前記折れ形線を起点として前記曲がり縁部を立体化する立体成形工程とを有することを特徴とする立体縁付き金属部品の製造方法。
(2) 前記折れ形付与工程ではさらに、前記曲がり縁部に隣接するブランク部分に、前記折れ形線とは山と谷が逆の折れ形線を付与する前記(1)に記載の立体縁付き金属部品の製造方法。
(3) 前記折れ形付与工程の前に、前記折れ形線の付与予定部に折目線を付ける折目付け工程を有する前記(1)又は(2)に記載の立体縁付き金属部品の製造方法。
(4) 前記(1)〜(3)のいずれかに記載の立体縁付き金属部品の製造方法において、前記ブランクとして、該ブランクの両端側に端板部を有するものを用い、前記端板部は、前記曲がり縁部の両端側のブランク部位を動かす際の挟持部及び該挟持部から前記ブランクにおける本体部分の両端につながる中間部を備えることを特徴とする立体縁付き金属部品の製造方法。
(5) 前記(1)〜(3)のいずれかに記載の立体縁付き金属部品の製造方法において、前記ブランクとして、前記曲がり縁部の反対側の縁部に長さ方向に分離した端板部を有するものを用い、前記端板部を前記曲がり縁部を動かす際の挟持部とすることを特徴とする立体縁付き金属部品の製造方法。
The present invention has been made based on the above findings, and the gist thereof is as follows.
(1) A metal part with a three-dimensional edge formed from a blank cut out from a metal plate and having curved curved edges with both ends, and the bent edge part or further the blank part adjacent to the bent edge part into a three-dimensional shape A method of manufacturing a metal part with a three-dimensional edge,
A bent shape imparting step for imparting a bent line of either a mountain fold or a valley fold along the bend of the bent edge to the bent edge;
Next, there is a three-dimensional molding step of three-dimensionalizing the bent edge with the bent line as a starting point by moving the blank portions on both ends of the bent edge so that the interval between the ends is narrowed or widened. The manufacturing method of the metal component with a solid edge characterized by the above-mentioned.
(2) The three-dimensionally edged metal according to (1), wherein in the bent shape imparting step, a blank portion adjacent to the bent edge portion is provided with a bent line having a mountain and a valley opposite to the bent line. A manufacturing method for parts.
(3) The method for manufacturing a metal part with a three-dimensional edge according to (1) or (2), further including a crease step of making a crease line on a portion where the fold line is to be provided before the fold shape provision step.
(4) In the method for manufacturing a metal part with a solid edge according to any one of (1) to (3), as the blank, a blank having end plate portions on both end sides of the blank is used. The manufacturing method of the metal component with a three-dimensional edge characterized by including the clamping part at the time of moving the blank site | part of the both ends side of the said bending edge part, and the intermediate part connected to the both ends of the main-body part in this blank from this clamping part.
(5) In the manufacturing method of the solid-edged metal part according to any one of (1) to (3), as the blank, an end plate part separated in a length direction at an edge part on the opposite side of the bent edge part The manufacturing method of the metal component with a three-dimensional edge characterized by using the thing which has this, and making the said end plate part into the clamping part at the time of moving the said bending edge part.

本発明によれば、被加工材(材料)は、絞り、張出し、伸びフランジの各変形はほとんどせずに曲げ変形するため、曲がり縁部を、われ、しわの発生なく縦壁又は山形に立体成形できて、高強度鋼板の単板からでも、立体縁付き金属部品を製造することが可能となる。さらに、伸び、縮み変形をほとんどさせずに成形することが可能であるため、従来では前記立体成形ができなかった曲率半径Rの小さい曲がり縁部に対しても、前記立体成形が可能となる。   According to the present invention, the work material (material) is bent and deformed with little deformation of the drawing, overhanging, and extension flange, so that the bent edge is broken, and the three-dimensional shape is formed into a vertical wall or a chevron without wrinkles. It is possible to form a metal part with a three-dimensional edge even from a single sheet of high-strength steel sheet. Further, since the molding can be performed with almost no expansion and contraction, the three-dimensional molding can be performed even on a bent edge portion having a small radius of curvature R, which has been impossible in the conventional three-dimensional molding.

本発明の実施形態例(1)を示す平面図である。It is a top view which shows embodiment example (1) of this invention. 実施形態例(1)による製造対象部品を示す立体図である。It is a three-dimensional view showing a part to be manufactured according to an embodiment (1). 本発明の実施形態例(2)を示す平面図である。It is a top view which shows example embodiment (2) of this invention. 実施形態例(2)による製造対象部品を示す立体図である。It is a three-dimensional view showing a part to be manufactured according to Embodiment (2). 本発明の実施形態例(3)を示す平面図である。It is a top view which shows example embodiment (3) of this invention. 実施形態例(3)による製造対象部品を示す立体図である。It is a three-dimensional view showing a part to be manufactured according to an embodiment (3). 本発明の実施形態例(4)を示す平面図である。It is a top view which shows example embodiment (4) of this invention. 実施形態例(4)による製造対象部品を示す立体図である。It is a three-dimensional view showing a part to be manufactured according to Embodiment (4). 本発明の実施形態例(5)を示す平面図である。It is a top view which shows example embodiment (5) of this invention. 実施形態例(5)による製造対象部品を示す立体図である。It is a three-dimensional view showing a part to be manufactured according to Embodiment (5). 本発明の実施形態例(6)を示す平面図である。It is a top view which shows example embodiment (6) of this invention. 実施形態例(6)による製造対象部品を示す立体図である。It is a three-dimensional view showing a part to be manufactured according to Embodiment (6). 折目線の例を示す平面図(a)及び断面図(b)である。It is the top view (a) and sectional drawing (b) which show the example of a crease line.

本発明は、金属板から切り出した、両端をもつ曲線状の曲がり縁部を有するブランクを素材とし、前記曲がり縁部あるいはさらにこれに隣接するブランク部分を立体(縦壁、山形、あるいはこれらの一方が他方に連なる立体)に成形して立体縁付き金属部品を得る、立体縁付き金属部品の製造方法であって、その製造工程として、前記曲がり縁部に、該曲がり縁部の曲がりに沿った山折れ又は谷折れいずれかの折れ形線を付与し、あるいはさらに前記曲がり縁部に隣接するブランク部分に、前記折れ形線とは山と谷が逆の折れ形線を付与する折れ形付与工程を有し、次いで、前記曲がり縁部の両端側のブランク部位を、該両端の間隔が狭まるかあるいは広がるように動かすことにより、前記折れ形線を起点として前記曲がり縁部あるいはさらに該曲がり縁部に隣接するブランク部分を立体化する立体成形工程とを有する。ここで、前記両端をもつ曲線状は、両端をもつ折れ線状をも含むものとする。   The present invention uses, as a material, a blank cut out from a metal plate and having curved curved edges with both ends, and the curved edges or a blank portion adjacent to the curved edges is further solid (vertical wall, mountain shape, or one of these) Is a method of manufacturing a metal part with a three-dimensional edge by forming a metal part with a three-dimensional edge by forming a metal part with a three-dimensional edge, and as a manufacturing process thereof, the bent part is bent along the bend of the bent edge. Alternatively, a folding line forming step is provided in which a bent line with either a valley or a valley is provided, or a blank line adjacent to the bent edge is provided with a bent line having a peak and a valley opposite to the bent line. Then, by moving the blank portions on both sides of the bent edge so that the distance between the ends is narrowed or widened, the bent edge or further is started from the bent line. And a three-dimensional molding process of three-dimensional blank portions adjacent to the curved rising edge. Here, the curved shape having both ends includes a polygonal line shape having both ends.

前記折れ形付与工程において折れ形線を付与すると、次工程である立体成形工程において、前記曲がり縁部の両端側のブランク部位を、該両端の間隔が狭まるかあるいは広がるように動かすことにより前記折れ形線を境界とする両側の線長差から、これら両側の一方が他方に対し自然に起き上がり、若しくは沈み、それゆえ前記折れ形線を起点として前記曲がり縁部あるいはさらに、該曲がり縁部に隣接するブランク部分を立体化することが可能かつ容易となる。前記折れ形付与工程なしでは、前記立体成形工程による立体化は極めて困難である。   When a bent line is applied in the bent shape applying step, in the next three-dimensional forming step, the bent portions are moved by moving the blank portions on both ends of the bent edge portion so that the distance between the both ends is narrowed or widened. Due to the difference in line length between the two sides with the shape line as a boundary, one of these two sides naturally rises or sinks with respect to the other, and therefore the bent edge or further adjacent to the bent edge starting from the bent line. It is possible and easy to make the blank part to be three-dimensional. Without the folding shape imparting step, it is very difficult to make a three-dimensional shape by the three-dimensional molding step.

なお、前記折れ形線は、これを付与してなる山折れ形又は谷折れ形の折れ角度が165度〜175度程度の鈍角となるように付与するのが好ましい。前記折れ形線を付与する手段としては、折れ形対応形状の金型を用いたプレス加工が好ましい。
又、本発明では、前記折れ形付与工程の前に、前記折れ形線の付与予定部に折目線を付ける折目付け工程を有するのが好ましい。これにより、部品の目標形状をより精度良く得ることができる。図13(a)に示すように、ブランク10に付与する折目線11は、実線状、破線状、点線状の何れでもよく、あるいはこれらを組み合わせたものでもよい。又、図13(b)に示すように、折目線11は、コイニング加工等により、V溝(あるいはU溝)状に形成するとよい。このとき、V溝の深さは、深くしすぎると前記立体成形工程において破断を招くおそれがあるため、対ブランク板厚比で20%以下とするのが好ましい。
In addition, it is preferable to give the said bent line so that the fold angle of the mountain fold shape or the valley fold shape which gives this may become an obtuse angle of about 165 degree-175 degree | times. As the means for providing the bent line, press working using a mold having a bent shape is preferable.
Moreover, in this invention, it is preferable to have the crease | folding process which attaches a crease line to the provision part of the said fold line before the said fold form provision process. Thereby, the target shape of a component can be obtained more accurately. As shown in FIG. 13 (a), the crease line 11 applied to the blank 10 may be a solid line, a broken line, a dotted line, or a combination thereof. Further, as shown in FIG. 13B, the crease line 11 may be formed in a V groove (or U groove) shape by coining or the like. At this time, if the depth of the V-groove is too deep, the three-dimensional forming process may cause breakage, so the thickness ratio to the blank plate is preferably 20% or less.

曲がり縁部の両端側のブランク部位を動かす際、両端の移動量に従ってブランク10の立体化が進行するため、ブランク10の断面形状は成形中変化するとともにブランク10は成形中立ち上がるように変形する。
両端側のブランク部位を動かすには治具によりブランク10の両端側に力を加え内方に向かって押すなどするだけでもよいが、力によりブランク10が前方に飛び出したりしないようブランク10の例えば両端側のブランク部位を挟持しつつ内方に向かって押すようにするなどしてもよく、挟持する場合はブランク10が成形中立ち上がるように変形するのに追随して挟持機構を回動可能なようにしてもよい。しかしながら、挟持機構を回動可能にするのは機構が複雑になるため、単に上下の金型等で挟持してブランク10の部分を水平に保ったまま動かせるようにするのが好ましい。かといって単純に水平に保ったまま動かすとブランク10の挟持されている部分が成形中立ち上がるのが阻害され、立体縁付き金属部品に所望の形状を付与できなくなる部分が生じる。
When the blank portions on both ends of the bent edge are moved, the blank 10 is three-dimensionalized according to the amount of movement at both ends, so that the cross-sectional shape of the blank 10 changes during molding and the blank 10 is deformed to rise during molding.
To move the blank part on both ends, it is only necessary to apply a force to both ends of the blank 10 with a jig and push it inward. For example, both ends of the blank 10 may be prevented from jumping forward by the force. It may be possible to push inward while pinching the blank part on the side, and when pinching, the clamping mechanism can be rotated to follow the deformation so that the blank 10 rises during molding It may be. However, since it is complicated to make the holding mechanism rotatable, it is preferable that the holding mechanism is simply held between the upper and lower molds so that the blank 10 can be moved while being kept horizontal. However, if it is moved while keeping it simply horizontal, the portion where the blank 10 is held is prevented from standing up during forming, and a portion where a desired shape cannot be imparted to the solid metal part with a solid edge is generated.

このため、素材に用いるブランクとして、ブランクの両端側に端板部を有するものを用い、端板部は曲がり縁部の両端側のブランク部位を動かす際の挟持部およびその挟持部からブランクにおける本体部分の両端につながる中間部を備えるようにしてもよい。
この場合、成形中に水平に対する角度が連続的に変化する部分に中間部をあてることで、挟持部は水平に保ったまま容易に両端側のブランク部位を動かすことができるようになり、成形後の立体縁付き金属部品に所望の形状を付与することもできるようになる。
For this reason, as the blank used for the material, a blank having end plate portions on both end sides of the blank is used, and the end plate portion is a holding portion for moving the blank portion on both ends of the bent edge portion, and the main body in the blank from the holding portion. You may make it provide the intermediate part connected to the both ends of a part.
In this case, by placing the intermediate part on the part where the angle with respect to the horizontal continuously changes during molding, the blank part on both ends can be easily moved while the clamping part is kept horizontal. A desired shape can be imparted to the three-dimensional metal part with a three-dimensional edge.

あるいはブランクとして、曲がり縁部の反対側の縁部に長さ方向に分離した端板部を有するものを用い、その端板部を曲がり縁部の両端を動かす際の挟持部としてもよい。
この場合、中間部を省略することができ、端板部が長さ方向に分離していることで両端を動かす際に端板部が外曲がり側に位置するときに引張の抵抗になったりわれが生じたりすることなく両端を移動させてブランクを変形させることができる。
Or as a blank, what has the end plate part isolate | separated to the length direction in the edge part on the opposite side to a bending edge part is good, and it is good also as a clamping part at the time of moving the both ends of a bending edge part.
In this case, the intermediate portion can be omitted, and the end plate portion is separated in the length direction, so that when the both end portions are moved, the end plate portion is located on the outer bending side, which may cause tensile resistance. The blank can be deformed by moving the both ends without causing the occurrence.

なお、いずれの場合も、挟持は上下の金型(図示せず)で行う場合は油圧等を用いれば強固に行うことができる。このほかブランクの固定あるいは挟持には、端板部に孔を設けてボルトを通して下金型に締結する方法など、強固に固定あるいは挟持を行える方法であればいかなる方法を用いてもよい。
本発明の実施形態例(1)を図1に、これによる製造対象部品を図2に示す。本例では、ブランク10の内曲がり側に位置する曲がり縁部3を部品20の縦壁縁TKとなすべく、まず、プレス加工にて、曲がり縁部3の反縁側境界に山折れ形線4を付与し、次いで、曲がり縁部3の両端1,2側のブランク部位を、これら両端1,2の間隔が狭まるように矢印30,31の向きに動かすことで、山折れ形線4を起点として曲がり縁部3を縦壁化し、所望の縦壁縁TK付きの部品20を得る。尚、図2において、COAはわれ発生有無の観察部位、SOAはしわ発生有無の観察部位である。
In any case, when the clamping is performed by upper and lower molds (not shown), it can be firmly performed by using hydraulic pressure or the like. In addition, any method may be used for fixing or clamping the blank as long as it can be firmly fixed or clamped, such as a method of providing a hole in the end plate portion and fastening it to the lower mold through a bolt.
FIG. 1 shows an embodiment (1) of the present invention, and FIG. In this example, in order to make the bending edge 3 located on the inner bending side of the blank 10 to be the vertical wall edge TK of the part 20, first, a bent line 4 is formed on the opposite edge side boundary of the bending edge 3 by press working. Next, move the blank part on both ends 1 and 2 side of the bent edge 3 in the direction of arrows 30 and 31 so that the distance between the ends 1 and 2 is narrowed. As described above, the bent edge portion 3 is formed into a vertical wall, and a part 20 with a desired vertical wall edge TK is obtained. In FIG. 2, COA is an observation site for occurrence of cracks and SOA is an observation site for occurrence of wrinkles.

本発明の実施形態例(2)を図3に、これによる製造対象部品を図4に示す。本例では、ブランク10の内曲がり側に位置する曲がり縁部3及びこれに隣接するブランク部分5を部品20の山形縁YGとなすべく、まず、プレス加工にて、曲がり縁部3の反縁側(図3中矢印A側)境界に山折れ形線4、及び、ブランク部分5の曲がり縁部3と反対側の境界に谷折れ形線6を付与し、次いで、曲がり縁部3の両端1,2側のブランク部位を、これら両端1,2の間隔が狭まるように矢印30,31の向きに動かすことで、山折れ形線4及び谷折れ形線6を起点として曲がり縁部3及びブランク部分5を山形化し、所望の山形縁YG付きの部品20を得る。尚、図4において、COAはわれ発生有無の観察部位、SOAはしわ発生有無の観察部位である。   FIG. 3 shows an embodiment (2) of the present invention, and FIG. 4 shows a part to be manufactured. In this example, in order to make the bent edge 3 located on the inner bent side of the blank 10 and the blank part 5 adjacent to the bent edge 3 as the chevron edge YG of the part 20, first, the opposite edge side of the bent edge 3 by pressing. (Arrow A side in FIG. 3) A mountain-shaped line 4 is given to the boundary, and a valley-shaped line 6 is given to the boundary opposite to the curved edge 3 of the blank portion 5, and then both ends 1 of the curved edge 3 , 2 side blank part is moved in the direction of arrows 30 and 31 so that the distance between both ends 1 and 2 is narrowed, and the bent edge 3 and blank are started from the mountain-folded line 4 and valley-shaped line 6 The portion 5 is chevronized to obtain the part 20 with the desired chevron edge YG. In FIG. 4, COA is an observation site for occurrence of cracks and SOA is an observation site for occurrence of wrinkles.

本発明の実施形態例(3)を図5に、これによる製造対象部品を図6に示す。本例では、ブランク10の外曲がり側に位置する曲がり縁部3及びこれに隣接するブランク部分5を部品20の山形縁YGとなすべく、まず、プレス加工にて、曲がり縁部3の反縁側(図5中矢印A側)境界に山折れ形線4、及び、ブランク部分5の曲がり縁部3と反対側の境界に谷折れ形線6を付与し、次いで、曲がり縁部3の両端1,2側のブランク部位を、これら両端1,2の間隔が狭まるように矢印30,31の向きに動かすことで、山折れ形線4及び谷折れ形線6を起点として曲がり縁部3及びブランク部分5を山形化し、所望の山形縁YG付きの部品20を得る。尚、図6において、COAはわれ発生有無の観察部位、SOAはしわ発生有無の観察部位である。   FIG. 5 shows an embodiment (3) of the present invention, and FIG. In this example, in order to make the bending edge 3 located on the outer bending side of the blank 10 and the blank part 5 adjacent thereto as the chevron edge YG of the part 20, first, the opposite edge side of the bending edge 3 by pressing. (Arrow A side in FIG. 5) A mountain-shaped line 4 is provided at the boundary, and a valley-shaped line 6 is provided at the boundary opposite to the bent edge 3 of the blank portion 5, and then both ends 1 of the bent edge 3 are provided. , 2 side blank part is moved in the direction of arrows 30 and 31 so that the distance between both ends 1 and 2 is narrowed, and the bent edge 3 and blank are started from the mountain-folded line 4 and valley-shaped line 6 The portion 5 is chevronized to obtain the part 20 with the desired chevron edge YG. In FIG. 6, COA is an observation site for occurrence of cracks and SOA is an observation site for occurrence of wrinkles.

本発明の実施形態例(4)を図7に、これによる製造対象部品を図8に示す。本例では、部品20は平面形状がT字形状であり、T字形の両腕部には縦壁縁TK、胴部には山形縁YGを有する。部品20に対応するブランク10は平面形状がY字形状である。
そこで、折れ形付与工程において、Y字形の両腕上縁側、及び左右の各腕下縁側から胴部の各脇側にかけての、曲がり縁部3の反縁側(図7中矢印A側)境界に山折れ形線4を付与する。かつ、胴部に対しては、山形縁YG形成用として、曲がり縁部3に隣接するブランク部分5の曲がり縁部3と反対側の境界に谷折れ形線6を付与する。
FIG. 7 shows an embodiment (4) of the present invention, and FIG. In the present example, the part 20 has a T-shaped planar shape, and has a vertical wall edge TK on both T-shaped arms and a chevron edge YG on the trunk. The blank 10 corresponding to the component 20 has a Y shape in plan view.
Therefore, in the bent shape imparting step, on the opposite edge side (arrow A side in FIG. 7) of the bent edge portion 3 from the upper edge side of both Y-shaped arms and from the lower edge sides of the left and right arms to the side sides of the torso. A mountain-shaped line 4 is given. For the trunk portion, a valley-shaped line 6 is applied to the boundary of the blank portion 5 adjacent to the bent edge portion 3 on the side opposite to the bent edge portion 3 for forming the chevron edge YG.

さらに、Y字形の結節部におけるわれ、しわを防止すべく、胴部の谷折れ形線6を両腕上縁側の山折れ形線4の最大曲がり点Pまで延長するとともに、各脇側の山折れ形線4の胴腕境界点Q1,Q2の各々と前記最大曲がり点Pとを結ぶ山折れ形線4を追加する。
次いで、立体成形工程において、Y字形の両腕上縁側の曲がり縁部3の両端1,2側のブランク部位を、これら両端1,2の間隔が広がるように矢印30,31の向きに動かすことにより、所望の縦壁縁TK乃至山形縁YG付きのT字形状の部品20を得る。ここで、上記のように曲がり縁部3の両端1,2側のブランク部位を動かす際、安定した動きを得るために、Y字形の胴部下端を固定しておく。すると、両腕下縁側の曲がり縁部3の両端1,2は、それぞれ左右両脇側の曲がり縁部3の両端のうちの一方を兼ねた可動端となり、他方となる固定端(前記胴部下端)との間隔が狭まるように動くことになるから、両脇部の曲がり縁部3乃至ブランク部分5は、上縁側の曲がり縁部3と同様に立体化する。
In addition, in order to prevent cracks and wrinkles at the Y-shaped nodule, the trough fold line 6 is extended to the maximum bend point P of the fold line 4 on the upper edge of both arms, and the ridges on each side A mountain fold line 4 connecting each of the torso boundary points Q1, Q2 of the fold line 4 and the maximum bending point P is added.
Next, in the three-dimensional molding process, the blank parts on both ends 1 and 2 of the bent edge 3 on the upper edge side of both Y-shaped arms are moved in the directions of arrows 30 and 31 so that the distance between both ends 1 and 2 is widened. Thus, a T-shaped part 20 with a desired vertical wall edge TK or a chevron edge YG is obtained. Here, when moving the blank part on the both ends 1 and 2 side of the bending edge 3 as described above, the lower end of the Y-shaped body is fixed in order to obtain a stable movement. Then, both ends 1 and 2 of the bent edge portion 3 on the lower edge side of both arms become a movable end that also serves as one of both ends of the bent edge portion 3 on the left and right sides, respectively, and the fixed end (the body portion described above) Therefore, the bent edge 3 to the blank part 5 on both sides are three-dimensionalized in the same manner as the bent edge 3 on the upper edge side.

本発明の実施形態例(5)を図9に、これによる製造対象部品を図10に示す。
ブランク10として、ブランク10の両端側に端板部7,7を有するものを用い、端板部7,7は曲がり縁部3の両端1,2側のブランク部位を動かす際の挟持部7aおよび挟持部7aからブランク10における本体部分10aの両端10bにつながる中間部7bを備える。
挟持部7aを図示しない上下の金型などで挟持するなどして固定し、両端1,2の間隔が狭まるように矢印30,31の向きに動かすことにより所望の縦壁縁TK付きの部品20を得る。挟持部7aから本体部分10aにかけての成形中に水平に対する角度が連続的に変化する部分に中間部7bをあてることで、挟持部7aは水平に保ったまま容易に両端側のブランク部位を動かすことができるようになり、成形後の立体縁付き金属部品に所望の形状を付与することもできるようになる。
FIG. 9 shows an embodiment (5) of the present invention, and FIG. 10 shows a part to be manufactured.
As the blank 10, the one having the end plate portions 7 and 7 on both end sides of the blank 10, the end plate portions 7 and 7 are sandwiched portions 7a when moving the blank portions on both ends 1 and 2 side of the bent edge portion 3 and An intermediate portion 7b connected from the sandwiching portion 7a to both ends 10b of the main body portion 10a in the blank 10 is provided.
A part 20 with a desired vertical wall edge TK is fixed by holding the holding part 7a with upper and lower molds (not shown) or the like and moving it in the directions of arrows 30 and 31 so that the distance between both ends 1 and 2 is narrowed. Get. By applying the intermediate part 7b to the part where the angle with respect to the horizontal continuously changes during molding from the sandwiching part 7a to the main body part 10a, the sandwiching part 7a can easily move the blank part on both end sides while keeping it horizontal. Thus, a desired shape can be imparted to the metal part with a solid edge after molding.

本発明の実施形態例(6)を図11に、これによる製造対象部品を図12に示す。
ブランク10として、ブランク10の曲がり縁部3の反対側の縁部に長さ方向Bに分離した端板部7,7を有するものを用い、端板部7,7を曲がり縁部3を動かす際の挟持部とする。端板部7,7は製造対象部品(立体縁付き金属部品)となる部分の形状に応じて、折目付け工程において、ブランク10に折目予定ライン8に沿ってコイニング加工等によりV溝(あるいはU溝)を付与したり、あるいはそれに代えてブランク10を折目予定ライン8に沿って曲げ加工したりして形成してもよい。
FIG. 11 shows an embodiment (6) of the present invention, and FIG.
As the blank 10, a blank 10 having end plate portions 7 and 7 separated in the length direction B at the edge opposite to the bent edge portion 3 of the blank 10 is used, and the bent edge portion 3 is moved by the end plate portions 7 and 7. It is a pinching part. The end plate portions 7 and 7 are formed in a V groove (or U) by coining or the like in the blank 10 along the planned crease line 8 in the folding process according to the shape of the part to be manufactured (metal part with a solid edge). Grooves) or a blank 10 may be formed by bending along the crease line 8 instead.

折目付け工程後、図示しない上下の金型などで挟持するなどして端板部7,7を固定し、両端1,2の間隔が狭まるように矢印30,31の向きに動かすことにより所望の縦壁縁TK付きの部品20を得る。   After the creasing process, the end plate portions 7 and 7 are fixed by being sandwiched by upper and lower molds (not shown), and moved in the directions of the arrows 30 and 31 so that the distance between the ends 1 and 2 is reduced. A part 20 with a vertical wall edge TK is obtained.

(実施例1)
表1に示す機械的特性を有する鋼板から切り出したブランクを素材とし、表2に示す成形方法で立体縁付き金属部品を製造し、得られた部品についてわれ、しわの発生有無を判定した。ここで、本発明例において、山折れ形線、谷折れ形線の折れ角度は90度とした。比較例No.1,8,15において、製造対象部品はそれぞれ本発明例No.2,10,18のそれと同じとした。われ発生有無は図2,4,6,8,10,12の観察部位COAを目視観察して判定し、しわ発生有無は観察部位SOAを目視観察して判定した。その結果を表2に示す。
Example 1
A blank cut out from a steel plate having mechanical properties shown in Table 1 was used as a raw material, and a metal part with a solid edge was manufactured by the forming method shown in Table 2, and the resulting part was cracked to determine whether wrinkles were generated. Here, in the example of the present invention, the fold angle of the mountain fold line and the valley fold line was 90 degrees. In Comparative Examples Nos. 1, 8, and 15, the parts to be manufactured were the same as those in Invention Examples Nos. 2, 10, and 18, respectively. The presence / absence of cracking was determined by visual observation of the observation site COA in FIGS. 2, 4, 6, 8, 10, and 12, and the presence / absence of wrinkle generation was determined by visual observation of the observation site SOA. The results are shown in Table 2.

表2より、高強度鋼板を素材としたブランクの曲がり縁部を立体成形して立体縁付き金属部品を製造する際、従来プレス成形ではわれ、しわが発生したが、本発明では、われ、しわを発生させることなく、所望の部品を製造できた。
(実施例2)
表1に示す機械的特性を有する鋼板から切り出したブランクを素材とし、上述の折目付け工程により折目として表3に示す条件でV溝を付け、その後表3に示す成形方法で立体縁付き金属部品を製造し、得られた部品についてわれ、しわの発生有無を判定し、かつ、目視により目標形状との一致具合を観察し、実施例1と比較(素材、成形方法の同じもの同士の比較)して目標形状との一致具合がさらに良好な場合に形状評価を○とした。ここで、山折れ形線、谷折れ形線の折れ角度は実施例1と同じ90度とした。われ発生有無は図2,4,6,8,10,12の観察部位COAを目視観察して判定し、しわ発生有無は観察部位SOAを目視観察して判定した。その結果を表3に示す。なお、表3中のV溝の深さ(%)はブランク板厚に対するV溝の深さの比である。
According to Table 2, when manufacturing a metal part with a three-dimensional edge by three-dimensionally forming the bent edge of a blank made of a high-strength steel plate, conventional press forming has caused wrinkles, but in the present invention, wrinkles and wrinkles have been generated. The desired part could be manufactured without generating it.
(Example 2)
A blank cut out from a steel sheet having mechanical properties shown in Table 1 is used as a raw material, and a V-groove is formed as a crease in the above-described crease process under the conditions shown in Table 3, and then a solid edged metal part is formed by the forming method shown in Table 3. In comparison with Example 1 (comparison between the same materials and molding methods), the presence or absence of wrinkles is determined and the degree of coincidence with the target shape is visually observed. When the degree of coincidence with the target shape is even better, the shape evaluation is evaluated as ◯. Here, the fold angle of the mountain fold line and the valley fold line was 90 degrees as in the first embodiment. The presence / absence of cracking was determined by visual observation of the observation site COA in FIGS. 2, 4, 6, 8, 10, and 12, and the presence / absence of wrinkle generation was determined by visual observation of the observation site SOA. The results are shown in Table 3. In addition, the depth (%) of the V groove in Table 3 is the ratio of the depth of the V groove to the blank plate thickness.

表3に示すとおり、われ、しわの発生はなく、しかも実施例1の場合よりも目標形状との一致具合がさらに良好(形状評価が○)である立体縁付き金属部品を製造できた。   As shown in Table 3, there was no occurrence of cracks and wrinkles, and a solid edged metal part having a better match with the target shape than the case of Example 1 (shape evaluation was ◯) could be produced.

Figure 2013013934
Figure 2013013934

Figure 2013013934
Figure 2013013934

Figure 2013013934
Figure 2013013934

1,2 曲がり縁部の両端
3 曲がり縁部
4 山折れ形線
5 曲がり縁部に隣接するブランク部分
6 谷折れ形線
7 端板部
7a 挟持部
7b 中間部
8 折目予定ライン
10 ブランク
10a ブランクにおける本体部分
10b ブランクにおける本体部分の両端
11 折目線
20 部品(立体縁付き金属部品)
30,31 ブランク部位を動かす向きを示す矢印
TK 縦壁縁
YG 山形縁
A 反縁側
B 長さ方向
1,2 Both ends of the bent edge
3 Bent edge
4 Mountain folded wire
5 Blank part adjacent to the curved edge
6 Valley-fold line
7 End plate
7a Clamping part
7b Middle part
8 Scheduled fold line
10 blank
10a Body part in blank
10b Both ends of body part in blank
11 Fold line
20 parts (metal parts with solid edges)
30,31 Arrow indicating the direction to move the blank part
TK vertical wall edge
YG Yamagata edge A Opposite side B Length direction

Claims (5)

金属板から切り出した、両端をもつ曲線状の曲がり縁部を有するブランクを素材とし、前記曲がり縁部あるいはさらに該曲がり縁部に隣接するブランク部分を立体に成形して立体縁付き金属部品を得る、立体縁付き金属部品の製造方法であって、
前記曲がり縁部に、該曲がり縁部の曲がりに沿った山折れ又は谷折れいずれかの折れ形線を付与する折れ形付与工程と、
次いで、前記曲がり縁部の両端側のブランク部位を、該両端の間隔が狭まるかあるいは広がるように動かすことにより、前記折れ形線を起点として前記曲がり縁部を立体化する立体成形工程とを有することを特徴とする立体縁付き金属部品の製造方法。
A blank cut out from a metal plate and having curved curved edges with both ends is used as a material, and the bent edge or further the blank part adjacent to the curved edge is formed in three dimensions to obtain a solid edged metal part. A method of manufacturing a metal part with a solid edge,
A bent shape imparting step for imparting a bent line of either a mountain fold or a valley fold along the bend of the bent edge to the bent edge;
Next, there is a three-dimensional molding step of three-dimensionalizing the bent edge with the bent line as a starting point by moving the blank portions on both ends of the bent edge so that the interval between the ends is narrowed or widened. The manufacturing method of the metal component with a solid edge characterized by the above-mentioned.
前記折れ形付与工程ではさらに、前記曲がり縁部に隣接するブランク部分に、前記折れ形線とは山と谷が逆の折れ形線を付与する請求項1に記載の立体縁付き金属部品の製造方法。   The manufacturing method of the metal component with a three-dimensional edge of Claim 1 which provides the folding line which a mountain and a valley are reverse to the said folding line to the blank part adjacent to the said bending edge part in the said bending form provision process further. . 前記折れ形付与工程の前に、前記折れ形線の付与予定部に折目線を付ける折目付け工程を有する請求項1又は2に記載の立体縁付き金属部品の製造方法。   The manufacturing method of the metal component with a three-dimensional edge of Claim 1 or 2 which has a crease process which attaches a crease line to the provision part of the said fold line before the said fold form provision process. 請求項1〜3のいずれかに記載の立体縁付き金属部品の製造方法において、前記ブランクとして、該ブランクの両端側に端板部を有するものを用い、前記端板部は、前記曲がり縁部の両端側のブランク部位を動かす際の挟持部及び該挟持部から前記ブランクにおける本体部分の両端につながる中間部を備えることを特徴とする立体縁付き金属部品の製造方法。   In the manufacturing method of the metal component with a solid edge in any one of Claims 1-3, what has an end plate part on the both ends of this blank is used as the said blank, The said end plate part is the said bending edge part. The manufacturing method of the metal component with a three-dimensional edge provided with the clamping part at the time of moving the blank site | part of a both-ends side, and the intermediate part connected to the both ends of the main-body part in this blank from this clamping part. 請求項1〜3のいずれかに記載の立体縁付き金属部品の製造方法において、前記ブランクとして、前記曲がり縁部の反対側の縁部に長さ方向に分離した端板部を有するものを用い、前記端板部を前記曲がり縁部を動かす際の挟持部とすることを特徴とする立体縁付き金属部品の製造方法。   In the manufacturing method of the metal component with a solid edge in any one of Claims 1-3, what has an end plate part separated in the length direction in the edge part on the opposite side of the above-mentioned bending edge part as the above-mentioned blank, The manufacturing method of the metal component with a three-dimensional edge characterized by using the said end plate part as a clamping part at the time of moving the said bending edge part.
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