WO2011034203A1 - 曲がり閉断面構造部品およびその製造方法 - Google Patents
曲がり閉断面構造部品およびその製造方法 Download PDFInfo
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- WO2011034203A1 WO2011034203A1 PCT/JP2010/066470 JP2010066470W WO2011034203A1 WO 2011034203 A1 WO2011034203 A1 WO 2011034203A1 JP 2010066470 W JP2010066470 W JP 2010066470W WO 2011034203 A1 WO2011034203 A1 WO 2011034203A1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/02—Making hollow objects characterised by the structure of the objects
- B21D51/06—Making hollow objects characterised by the structure of the objects folded objects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/20—Bending sheet metal, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
- B21D47/01—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
- B21D47/04—Making rigid structural elements or units, e.g. honeycomb structures composite sheet metal profiles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49391—Tube making or reforming
Definitions
- the present invention relates to a closed cross-section component having a bent shape and a method for manufacturing the same.
- Patent Document 1 it is possible to obtain a deep-drawn molded product with excellent sealing performance in bulging without lap welding all peripheral portions of two or more metal plates, and simultaneously molding a plurality of parts.
- a hydroform processing apparatus, a hydroform processing method, and a hydroform processed product excellent in production efficiency are disclosed.
- Patent Document 2 discloses a roll forming process in which a strip is formed into a substantially closed cross-section with a multi-stage forming roller, a step of crimping and joining a butted portion with a caulking roller, and the obtained closed cross-section long material is a
- a manufacturing method of a closed cross-section curved long material comprising a step of bending with a large number of bending rollers along a moving direction is disclosed.
- Patent Document 3 it is possible to obtain a press-molded product having a twist in the middle of a closed cross-sectional shape from a single material, and a high-quality wound cross-section press-formed product having a lightweight and highly rigid twisted portion at a low cost.
- the technology provided in is disclosed.
- Patent Document 1 is a prior art related to the hydroform technology, and conventionally, it has been necessary to weld all the peripheral portions before injecting the working fluid.
- this technology one or both of the metal plates are contacted. This is a technique that enables molding without leakage of the working fluid by providing a sliding seal on the plate pressing surface and a non-sliding seal on the plate pressing surface in contact with the other. With this method, the welding process before hydroforming can be omitted, and the time required to extract the working fluid from the molded product after hydroforming can be shortened.
- the present technology does not change the hydroform molding, and the equipment cost is very high. Further, in order to assemble the molded product, it is necessary to weld it after all. In this case, there is a problem that the surface accuracy of the welded surface is lowered.
- Patent Document 2 is a prior art related to roll forming technology, which is a technology for forming a crimped joint on a longitudinal surface in order to form a closed cross-section curved long material by roll forming and omit butt welding. This technique can omit the continuous welding to make a closed section, and can reduce the cost compared to the conventional roll forming, but a multi-stage mold necessary for roll forming is essential. Therefore, it is difficult to reduce the equipment cost.
- Patent Document 3 is a technique that discloses a press molding method.
- flange parts are formed at both ends of the blank as preforming, then the preform is pushed into a die that is narrower than the preformed shape and close to the final shape, and then molded in the final process.
- This is a molding method in which a preform is pushed into a die having a twisted shape in the longitudinal direction.
- a torsion-shaped part with a straight vertical wall can be molded.
- the flange is greatly deformed during pre-molding after flange molding. Therefore, there is a problem that the end faces cannot be brought together.
- the conventional closed-section component manufacturing technology includes hydroform technology and roll forming technology, it is disadvantageous for press molding in terms of equipment cost and manufacturing cost, and is manufactured using the press molding technology. Then, there are restrictions on the cross-sectional shape.
- the object of the present invention is to solve the problem of manufacturing cost and to provide a method of manufacturing a polygonal closed cross-section structure part having a curved shape in the longitudinal direction only by press molding.
- the present invention enables the production of a closed cross-section structure part having a curved surface by pre-molding and welding using two metal flat plates for the purpose of reducing the number of press forming steps and improving the accuracy of the part, and then applying compression bending.
- the inventors have found that this is possible and have reached the present invention.
- the gist of the present invention is as follows.
- a first invention is a method of manufacturing a curved closed cross-section structural component from two metal flat plates, and a linear or curved crease is formed in a portion corresponding to a polygonal bent shape in the longitudinal direction of the metal flat plate. While forming, press forming step of forming a flange portion on at least one side of both end portions in the width direction of the metal flat plate and the flange portions of the two metal flat plates formed by pressing and the end portions without the flange portion are overlapped.
- the second invention is a manufacturing method of a bent closed cross-section structure component characterized in that in the manufacturing method according to the first invention, a step of trimming the flange portion is provided after the press molding step.
- the third invention is a bent closed cross-section structure part manufactured by the manufacturing method described in the first invention or the second invention.
- the present invention makes it possible to manufacture a closed cross-section structural component having a bent shape at a lower cost than hydroform and roll forming, which are conventional closed cross-section component manufacturing techniques.
- this part can not only be bent at low cost, it can also be reduced in weight by minimizing the flange, and the welding position can be brought closer to the part body position, so that the rigidity including torsional rigidity can be improved. It becomes possible.
- FIG. 1 is a view showing the appearance of a bent closed cross-section structural component showing an embodiment of the present invention.
- the cross-sectional shape is a quadrangular shape that is bent in the longitudinal direction, and has a flange portion at the diagonal of the quadrangular shape.
- the length of one side (each side) of the square cross section is 30 mm, the length in the longitudinal direction is 300 mm, the bending radius of curvature is 1000 mm, and the flange width is 5 mm.
- FIG. 2A shows a pre-forming step which is a first step of manufacturing a quadrangular bent closed cross-section structure part.
- a blank A and a blank B obtained by dividing a quadrangle into two equal parts are manufactured from two metal flat plates.
- a quadrangular shape is described, but the present invention is not limited to a quadrangular shape, and may be a polygonal shape such as a pentagonal shape or a hexagonal shape.
- This pre-molding step is a step of pre-bending a metal flat plate at a portion that becomes each vertex of a square cross section.
- the bend line ( ⁇ ) formed at the punch bottom of the mold at the time of pre-bending is formed with a constant curvature so as to be bent in the compression bending process (third process) which is the final process.
- the part that becomes the welding surface in the second step is also shaped so that the bend line ( ⁇ ) has a constant curvature.
- the curvature and the center of curvature of the bend line ( ⁇ ) and the bend line ( ⁇ ) are the same, but the curvature of the bend line ( ⁇ ) and the bend line ( ⁇ ) can be changed, or the position of the center of curvature can be changed. It can also be made into a shape to which bending and twisting are simultaneously applied.
- this figure has shown the case where a flange part is formed in the both sides of a board width end part, what is necessary is just to form a flange part in the one side of a board width both ends.
- FIG. 2B is a diagram showing a second step in which the metal flat plates preformed in the first step are overlapped and the ends are welded to be integrated.
- the edge of the plate may be trimmed and the shape adjusted after leaving the tool presser width, and welding may be applied to the end. This makes it possible to reduce the weight of parts.
- this figure shows the case where the flange part is formed on both sides of the plate width end part, but when the flange part is formed only on one side of the plate width end part, the end part without the flange part is shown.
- the end portion can be fixed by a predetermined pressing jig (not shown) and the vicinity of the end portion can be welded.
- the welding method is not particularly limited, and examples include normal spot welding, laser welding, arc welding, TIG welding, and seam welding.
- welding can weld a part or all of the edge part of a metal flat plate continuously along the longitudinal direction of a metal flat plate.
- FIG. 2 (c) is a diagram showing a final process for determining a product shape by compression bending.
- a gripping tool having a shape along the weld line
- the flanges at both ends of the pre-formed product after welding are respectively fixed and compressed in the direction of the component center axis. That is, compression is performed by reducing the distance between the gripping tools.
- the cross-sectional angle of the welded portion becomes obtuse, and at the same time, the cross-sectional angle of the bent portion around the bend line ( ⁇ ) becomes sharp. It is necessary to adjust the amount of compression so that the cross-sectional angle specified after unloading becomes the compression.
- This figure shows the case where the flange part is formed on both sides of the preformed product after welding. However, when the flange part is formed only on one side of the preformed part, the end part without the flange part is shown. Also, by fixing the end with a predetermined gripping tool (not shown), it can be compressed and deformed in the same manner as in the case where there are flanges at both ends.
- a metal flat plate such as a steel material and a non-ferrous material may be used.
- a steel material a normal hot-rolled steel plate, cold-rolled steel plate, plating Steel plates (zinc-based plating, aluminum-based plating, etc.) can be used, and any of soft steel plates to ultra-high strength steel plates can be applied.
- Figures 3 to 7 show the shape of the pre-molding (first step) of the quadrangle-curved closed cross-section structure, and various forms, laser welding at the bend line ( ⁇ ), and then compression bending to form
- the Example which evaluated the propriety and the feasibility of welding is shown.
- An alloyed hot-dip galvanized steel sheet (GA) having a plate thickness of 1.2 mm and a tensile strength of 980 MPa was used as the material.
- the zinc adhesion amount (per one side) is 45 g / m 2 .
- laser welding with an output of 3.8 KA was used for the welding.
- the welding speed is 2.5 m / min.
- Pre-molding was performed on blank A and blank B, which were obtained by equally dividing a quadrangular section into two. Specific examples of blank A and blank B are shown in FIGS. 2B, 2C, and 3 to 7.
- FIG. The cross-sectional shape after compression molding is shown in FIG.
- Two cross-sectional shapes of the cross section 1 and the cross section 2 viewed from the longitudinal direction are shown in each of FIGS.
- Bending lines ( ⁇ ) and ( ⁇ ) correspond to the portions that become the corners of the quadrangular cross section, and are the bending reference lines. Further, the bending line ( ⁇ ) is also a welding reference line when the blanks A and B are overlapped and welded.
- FIG. 3 shows the pre-formed shape and the cross-sectional shape after forming.
- the length of one side (each side) of the quadrangular section is 30 mm, the length in the longitudinal direction is 300 mm, and the bending curvature is 1000 mm.
- the flange width is 5 mm (the flange portion is not trimmed after pre-molding).
- the bend line ( ⁇ ) is parallel to the bend line ( ⁇ ), and all the bend lines of the blank A and the blank B are at the same position.
- FIG. 4 shows the shape of pre-molding and the cross-sectional shape after molding.
- the length of the side of the quadrangular cross section (octopus shape) is 40 mm for the long side, 20 mm for the short side, 300 mm for the length in the longitudinal direction, and 1000 mm for the bending curvature.
- the flange width is 3 mm (the flange portion is not trimmed after pre-molding).
- the bend line ( ⁇ ) and the bend line ( ⁇ ) have the same curvature, but the bend line ( ⁇ ) is inclined with respect to the bend line ( ⁇ ). The bend lines are in the same position.
- FIG. 5 shows the shape of pre-molding and the cross-sectional shape after molding.
- the length of the side of the rectangular cross section (rectangle) is 40 mm for the long side, 20 mm for the short side, 300 mm for the length in the longitudinal direction, and 1000 mm for the bending curvature.
- the flange width is 5 mm (the flange portion is not trimmed after pre-molding).
- the bend line ( ⁇ ) and the bend line ( ⁇ ) have the same curvature, but the bend line ( ⁇ ) has a shape inclined with respect to the bend line ( ⁇ ), and the bending in the blank A and the blank B is further performed.
- the slope of the line ( ⁇ ) is opposite. Therefore, as for the cross-sectional shape after molding, the left and right sides of the cross section 1 and the cross section 2 are reversed.
- FIG. 6 shows the pre-formed shape and the cross-sectional shape after forming.
- the length of one side (each side) of the quadrangular section is 30 mm, the length in the longitudinal direction is 300 mm, and the bending curvature is 1000 mm.
- the flange width was 5 mm (after trimming), and the flange portion was trimmed after pre-molding.
- both the blank A and the blank B have the bend line ( ⁇ ) parallel to the bend line ( ⁇ ), and all the bend lines of the blank A and the blank B are in the same position. There is no flange at the position of one bend line ( ⁇ ). Therefore, this part was joined by arc welding in the full length welding after the blank A and the blank B were overlapped.
- FIG. 7 shows the pre-formed shape and the cross-sectional shape after forming.
- the length of one side (each side) of the quadrangular section is 30 mm
- the length in the longitudinal direction is 300 mm
- the bending curvature is 1000 mm.
- both the blank A and the blank B were formed to the final shape by press molding, and after the blank A and the blank B were overlapped, the flange portion was continuously welded to form a quadrangular closed section.
- Invention Examples 1 to 4 can be molded and welded in any shape. In addition, no defects such as cracks and breaks occurred in the welded part after forming.
- Comparative Example 1 the molded parts were twisted, wrinkled, and spring-backed, and the dimensional accuracy was very low. Further, the butt accuracy of the flange surface after press molding is low, a gap is generated in the plate overlap portion, a non-welded portion is generated, and laser welding is impossible. Therefore, the durability as a component (automobile component or the like) has been significantly reduced.
- the quadrangular cross section is formed only by bending, so that a high-tensile steel sheet can be applied.
- the width of the flange portion can be reduced to 3 to 5 mm, so that it can be applied to automobile parts.
- automobile parts for example, it can be applied to reinforcing parts such as front pillars, roof rails, and door impact beams.
Abstract
Description
図1は、本発明の一実施の形態を示す曲がり閉断面構造部品の外観を示す図である。断面形状は、4角形で長手方向に曲がり形状を有しており、4角形の対角にフランジ部を有している。4角断面の一辺(各辺)の長さは30mm、長手方向長さは300mm、曲がり曲率半径は1000mm、フランジ幅は5mmである。
図2(a)に4角形の曲がり閉断面構造部品製造の第1工程である予成形工程を示す。本工程では、4角形を対角で2等分したブランクA、ブランクBを2枚の金属平板から製造する。本実施の形態では4角形について述べるが4角形に限定されるものではなく、5角形、6角形等の多角形であっても良い。
予曲げ時の金型のパンチ底で形成される曲げ線(α)は、最終工程である圧縮曲げ工程(第3工程)で曲がり形状となるように一定の曲率で成形される。
予成形の形状と成形後の断面形状を図3に示す。4角形断面の一辺(各辺)の長さは30mm、長手方向長さは300mm、曲げ曲率は1000mmである。フランジ幅は5mm(予成形後にフランジ部のトリミングは行っていない)である。
ブランクA、ブランクBとも曲げ線(α)は曲げ線(β)と平行であり、ブランクAとブランクBとの全ての曲げ線は、同じ位置にある。
予成形の形状と成形後の断面形状を図4に示す。4角形断面(たこ形)の辺の長さは、長辺が40mm、短辺が20mm、長手方向長さは300mm、曲げ曲率は1000mmである。フランジ幅は3mm(予成形後にフランジ部のトリミングは行っていない)である。
曲げ線(α)と曲げ線(β)とは同じ曲率であるが、曲げ線(α)は曲げ線(β)に対して傾いた形状となっているが、ブランクAとブランクBとの全ての曲げ線は、同じ位置にある。
予成形の形状と成形後の断面形状を図5に示す。4角形断面(長方形)の辺の長さは、長辺が40mm、短辺が20mm、長手方向長さは300mm、曲げ曲率は1000mmである。フランジ幅は5mm(予成形後にフランジ部のトリミングは行っていない)である。
曲げ線(α)と曲げ線(β)とは同じ曲率であるが、曲げ線(α)は曲げ線(β)に対して傾いた形状となっており、さらに、ブランクA、ブランクBにおける曲げ線(α)は傾き方向が逆方向となっている。従って、成形後断面形状は、断面1と断面2は左右が逆になっている。
予成形の形状と成形後の断面形状を図6に示す。4角形断面の一辺(各辺)の長さは30mm、長手方向長さは300mm、曲げ曲率は1000mmである。フランジ幅は5mm(トリミング後)であり、予成形後にフランジ部のトリミングを行なった。
No.1(発明例1)と同じく、ブランクA、ブランクBとも曲げ線(α)は曲げ線(β)と平行であり、ブランクAとブランクBとの全ての曲げ線は、同じ位置にあるが、片方の曲げ線(β)の位置にはフランジが存在しない。従ってこの部位はブランクA、ブランクBを重ね併せた後の全長溶接は、アーク溶接により接合した。
予成形の形状と成形後の断面形状を図7に示す。4角形断面の一辺(各辺)の長さは30mm、長手方向長さは300mm、曲げ曲率は1000mmである。本比較例では、ブランクA、ブランクBともプレス成形で最終形状まで成形して、ブランクA、ブランクBを重ね併せた後に、フランジ部を連続溶接して4角形閉断面とした。
上述したNo.1~No.5で作成した4角形曲がり閉断面構造部品について成形の可否と溶接の可否について評価を行った。
表1に評価結果を示す。評価結果は、○:成形可または溶接可、×:成形不可または溶接不可、で表示した。
2 閉断面構造部品の断面
α 予成形における曲げ線
β 予成形における曲げ線
A 予成形品
B 予成形品
Claims (3)
- 2枚の金属平板から曲がり閉断面構造部品を製造する方法であって、金属平板の長手方向に、多角形の曲がり形状に該当する部分に直線状または曲線状の折り目を成形するとともに、金属平板の幅方向両端部のうち少なくとも片側にフランジ部を成形するプレス成形工程と、前記プレス成形した2枚の金属平板のフランジ部同士およびフランジ部が無い端部同士を重ね併せて、重ね併せた部分を前記金属平板の長手方向に溶接して閉断面構造とする工程と、得られた閉断面構造の両端部を治具で固定し、閉断面構造の中心軸方向に圧縮してプレス成形工程で成形された折り目を起点として長手方向に湾曲した多角形閉断面構造とする工程とを有することを特徴とする曲がり閉断面構造部品の製造方法。
- 前記プレス成形工程の後に、フランジ部をトリミングする工程を備えることを特徴とする請求項1に記載の曲がり閉断面構造部品の製造方法。
- 請求項1または請求項2に記載の製造方法により製造された曲がり閉断面構造部品。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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CN201080040501.2A CN102481616B (zh) | 2009-09-16 | 2010-09-15 | 弯曲闭合截面结构部件及其制造方法 |
KR1020157002388A KR101613404B1 (ko) | 2009-09-16 | 2010-09-15 | 곡선으로 된 폐단면 구조 부품 및 그 제조 방법 |
CA2773034A CA2773034C (en) | 2009-09-16 | 2010-09-15 | Curvilineal closed structure parts and method for manufacturing the same |
EP10817315.4A EP2478977B1 (en) | 2009-09-16 | 2010-09-15 | Method for manufacturing a curved closed-section structural component |
US13/391,850 US9009970B2 (en) | 2009-09-16 | 2010-09-15 | Curvilineal closed structure parts and method for manufacturing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2009-213984 | 2009-09-16 | ||
JP2009213984A JP5640346B2 (ja) | 2009-09-16 | 2009-09-16 | 多角形閉断面構造部品の製造方法 |
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WO2011034203A1 true WO2011034203A1 (ja) | 2011-03-24 |
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US (1) | US9009970B2 (ja) |
EP (1) | EP2478977B1 (ja) |
JP (1) | JP5640346B2 (ja) |
KR (2) | KR101613404B1 (ja) |
CN (1) | CN102481616B (ja) |
CA (1) | CA2773034C (ja) |
WO (1) | WO2011034203A1 (ja) |
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WO2013179618A1 (ja) * | 2012-05-28 | 2013-12-05 | Jfeスチール株式会社 | 閉断面構造体の成形方法及び閉断面構造体の成形装置 |
EP2837437A4 (en) * | 2012-04-13 | 2015-11-04 | Jfe Steel Corp | DEVICE AND METHOD FOR PRODUCING COMPONENT WITH NON-CLOSED CROSS SECTION WITHOUT WING POSSESSING CURVED SHAPE |
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TWI477329B (zh) * | 2012-04-13 | 2015-03-21 | Jfe Steel Corp | 具有彎曲形狀之閉斷面構造部品的製造方法及裝置 |
TWI477330B (zh) * | 2012-04-13 | 2015-03-21 | Jfe Steel Corp | 具有彎曲形狀之無凸緣閉斷面構造部品的製造方法及裝置 |
EP2837436B1 (en) | 2012-04-13 | 2016-11-23 | JFE Steel Corporation | Device and method for producing closed-cross-section-structure component |
JP5966617B2 (ja) * | 2012-05-28 | 2016-08-10 | Jfeスチール株式会社 | 閉断面構造体の成形方法及び閉断面構造体の成形装置 |
JP5761275B2 (ja) | 2013-08-26 | 2015-08-12 | Jfeスチール株式会社 | 曲がり形状を有する多角形閉断面構造部品の製造方法およびその方法で製造した多角形閉断面構造部品 |
JP5866324B2 (ja) * | 2013-09-30 | 2016-02-17 | 本田技研工業株式会社 | 中空状構造部品のハイドロフォーム成形方法 |
WO2018101235A1 (ja) * | 2016-11-30 | 2018-06-07 | アイシン軽金属株式会社 | 構造部材 |
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- 2010-09-15 CN CN201080040501.2A patent/CN102481616B/zh active Active
- 2010-09-15 KR KR1020157002388A patent/KR101613404B1/ko active IP Right Grant
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EP2837437A4 (en) * | 2012-04-13 | 2015-11-04 | Jfe Steel Corp | DEVICE AND METHOD FOR PRODUCING COMPONENT WITH NON-CLOSED CROSS SECTION WITHOUT WING POSSESSING CURVED SHAPE |
US9669444B2 (en) | 2012-04-13 | 2017-06-06 | Jfe Steel Corporation | Method of manufacturing curvilineal closed structure parts without flange and apparatus for the same |
WO2013179618A1 (ja) * | 2012-05-28 | 2013-12-05 | Jfeスチール株式会社 | 閉断面構造体の成形方法及び閉断面構造体の成形装置 |
US9862017B2 (en) | 2012-05-28 | 2018-01-09 | Jfe Steel Corporation | Method and apparatus that forms a closed cross-sectional structure |
US10160031B2 (en) | 2012-05-28 | 2018-12-25 | Jfe Steel Corporation | Method of forming a closed cross-sectional structure |
Also Published As
Publication number | Publication date |
---|---|
KR101613404B1 (ko) | 2016-04-18 |
KR20150017776A (ko) | 2015-02-17 |
EP2478977B1 (en) | 2017-01-04 |
CN102481616A (zh) | 2012-05-30 |
CA2773034C (en) | 2014-04-29 |
CN102481616B (zh) | 2015-12-02 |
KR20120054055A (ko) | 2012-05-29 |
EP2478977A4 (en) | 2014-11-26 |
US20120204993A1 (en) | 2012-08-16 |
EP2478977A1 (en) | 2012-07-25 |
JP5640346B2 (ja) | 2014-12-17 |
CA2773034A1 (en) | 2011-03-24 |
US9009970B2 (en) | 2015-04-21 |
JP2011062713A (ja) | 2011-03-31 |
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