JPWO2016133210A1 - Metal plate forming method and molded product - Google Patents
Metal plate forming method and molded product Download PDFInfo
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- JPWO2016133210A1 JPWO2016133210A1 JP2017500765A JP2017500765A JPWO2016133210A1 JP WO2016133210 A1 JPWO2016133210 A1 JP WO2016133210A1 JP 2017500765 A JP2017500765 A JP 2017500765A JP 2017500765 A JP2017500765 A JP 2017500765A JP WO2016133210 A1 JPWO2016133210 A1 JP WO2016133210A1
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- 239000002184 metal Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000012779 reinforcing material Substances 0.000 claims abstract description 50
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 48
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 48
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 238000005304 joining Methods 0.000 claims description 16
- 239000000835 fiber Substances 0.000 claims description 7
- 239000011888 foil Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 55
- 238000000465 moulding Methods 0.000 description 48
- 208000010392 Bone Fractures Diseases 0.000 description 41
- 206010017076 Fracture Diseases 0.000 description 41
- 238000005452 bending Methods 0.000 description 9
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 8
- 125000004122 cyclic group Chemical group 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 230000003466 anti-cipated effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 229910000885 Dual-phase steel Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/201—Work-pieces; preparation of the work-pieces, e.g. lubricating, coating
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/203—Deep-drawing of compound articles
-
- 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/005—Processes combined with methods covered by groups B21D1/00 - B21D31/00 characterized by the material of the blank or the workpiece
- B21D35/007—Layered blanks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Laminated Bodies (AREA)
- Forging (AREA)
- Resistance Welding (AREA)
- Table Devices Or Equipment (AREA)
Abstract
金属板の成形において、金属板の材質、及び、成形工程を変えることなく、金属板が破断しないように成形する成形方法であって、成形前に金属板の一部に補強材を接合し、その後金属板を成形することを特徴とする。In forming the metal plate, without changing the material of the metal plate and the forming process, the metal plate is formed so that the metal plate is not broken, and a reinforcing material is joined to a part of the metal plate before forming, Thereafter, a metal plate is formed.
Description
本発明は、絞り成形、伸びフランジ成形、曲げ成形、張出し成形のような金属板の成形において、破断が生じない成形方法と、該成形方法で成形した成形品に関する。 The present invention relates to a molding method in which breakage does not occur in molding of a metal plate such as draw molding, stretch flange molding, bending molding, and stretch molding, and a molded product molded by the molding method.
通常、金属板の成形性は、金属板の強度が上昇するほど低下する。それゆえ、特に強度の高い金属板を成形する場合、成形される部位で塑性変形が追従できないと、内部応力が破断耐力を超えて破断する。 Usually, the moldability of a metal plate decreases as the strength of the metal plate increases. Therefore, when a highly strong metal plate is formed, if the plastic deformation cannot follow the part to be formed, the internal stress exceeds the breaking strength and breaks.
図１に、金属板の絞り成形におけるパンチの肩部での破断の態様を示す。金属板のブランク材１を、ダイス２の中に、ブランクホルダー４でブランク材１のフランジ部１’を押圧しつつ、パンチ３で押し込んで絞り成形を行う。絞り成形は、パンチ３の肩部３’でのブランク材１の破断耐力と、ブランク材１のフランジ部１’に作用する引込み力との釣り合いのもとで絞り成形が進行する。 FIG. 1 shows an aspect of fracture at the shoulder portion of a punch in drawing forming of a metal plate. The blank material 1 made of a metal plate is pressed into the die 2 by the punch 3 while pressing the flange portion 1 ′ of the blank material 1 with the blank holder 4 to perform drawing. In the drawing, drawing is performed under a balance between the breaking strength of the blank 1 at the shoulder 3 ′ of the punch 3 and the pulling force acting on the flange 1 ′ of the blank 1.
そして、フランジ部１’の変形抵抗６が、パンチ３の肩部３’に接するブランク材１の破断耐力と等しくなったとき、フランジ部１’の変形（ダイス２内への引き込まれ）が停止し、一方、パンチ３の肩部３’に接するブランク材１の部位のみで変形が進行して破断する。 When the deformation resistance 6 of the flange portion 1 ′ becomes equal to the breaking strength of the blank 1 in contact with the shoulder portion 3 ′ of the punch 3, the deformation of the flange portion 1 ′ (drawn into the die 2) is stopped. On the other hand, the deformation proceeds and breaks only at the portion of the blank 1 that is in contact with the shoulder 3 'of the punch 3.
ブランク材の絞り成形において破断を回避するためには、パンチの肩部に接する部位の破断耐力が高いことが重要であり、これまで、絞り成形時のブランク材の破断を防止する技術が幾つか提案されている。 In order to avoid breakage during drawing of blank material, it is important that the fracture strength of the part in contact with the shoulder portion of the punch is high, and there have been several techniques for preventing breakage of the blank material during drawing until now. Proposed.
特許文献１には、ブランク材をプレス成形する際、ブランク材の板厚減少が見込まれる箇所に、溶接ビードを２本以上設けてプレス成形する方法が提案されている。 Patent Document 1 proposes a method in which two or more welding beads are provided and press-molded at a location where a reduction in the thickness of the blank material is expected when the blank material is press-molded.
特許文献２には、１５％以上中心部の材料より強度×板厚が低いか、又は、５％以上中心部の材料より延性の優れた高張力鋼板が、深絞り成形後製品となる部分以外で、成形時にしわ抑え力を付与する部分の絞りフランジ部の全周にわたり、鋼板同士で溶接されている深絞り成形性に優れたプレス成形用テーラードブランク材が提案されている。 In Patent Document 2, the strength × plate thickness is 15% or more lower than that of the center material, or a high-tensile steel plate having ductility higher than 5% or more of the center material is a part other than a part that becomes a product after deep drawing. Thus, a tailored blank material for press molding excellent in deep drawability, which is welded between steel plates over the entire circumference of a drawing flange portion that imparts a wrinkle suppressing force during forming, has been proposed.
しかし、いずれの技術においても、ブランク材の溶接入熱部で材質が脆くなり、ブランク材の材質は不均一となるので、プレス成形時のブランク材の破断を完全に回避することは難しい。 However, in any technique, since the material becomes brittle at the welding heat input portion of the blank material and the material of the blank material becomes non-uniform, it is difficult to completely avoid the breakage of the blank material during press molding.
一般に、金属板の成形において破断を防止する手法としては、大きく分けて、成形工程の改良、及び、金属板の材質改善が考えられる。たとえば、絞り成形工程の改良では、金型の分割法や、プレス工程数の増加が考えられるが、これらの方法では、成形コストの上昇や、生産性の低下は避けられない。 In general, as a technique for preventing breakage in forming a metal plate, it can be roughly divided into improvement of the forming process and improvement of the material of the metal plate. For example, in the improvement of the drawing process, it is conceivable to increase the mold dividing method and the number of pressing processes. However, these methods inevitably increase the molding cost and decrease the productivity.
特許文献１及び２には、高強度鋼板の材質改善として、部分焼入れによる材質の変化（強化）や、異質材の接合が開示されている。しかしながら、これらの方法も、同様に、成形コストの上昇や、生産性の低下は避けられない。 Patent Documents 1 and 2 disclose material changes (strengthening) by partial quenching and joining of heterogeneous materials as material improvements for high-strength steel sheets. However, in these methods as well, an increase in molding cost and a decrease in productivity are unavoidable.
そこで、本発明は、金属板の成形において、金属板の材質、及び、成形工程を変えずに、金属板が破断しないように成形することを課題とし、該課題を解決する成形方法と、該成形方法で成形した成形品を提供することを目的とする。 Then, this invention makes it a subject to shape | mold so that a metal plate may not fracture | rupture, without changing the material of a metal plate and a shaping | molding process in shaping | molding a metal plate, and the shaping | molding method which solves this subject, It aims at providing the molded article shape | molded with the shaping | molding method.
本発明者らは、上記課題を解決する手法について鋭意検討した。その結果、本発明者らは、金属板の成形に際し、所要の破断耐力が必要な部位に補強材（Reinforcing material）を接合すれば、上記部位での破断耐力が向上し、破断を防止できることを見出した。 The present inventors diligently studied a method for solving the above problems. As a result, the present inventors have found that, when a reinforcing material (Reinforcing material) is joined to a portion where a required breaking strength is required when forming a metal plate, the breaking strength at the above portion is improved and breakage can be prevented. I found it.
本発明は、上記知見に基づいてなされたもので、その要旨は以下のとおりである。 This invention was made | formed based on the said knowledge, and the summary is as follows.
（１）金属板を成形する方法であって、成形前に上記金属板の一部に補強材を接合し、その後上記金属板を成形することを特徴とする金属板の成形方法。 (1) A method for forming a metal plate, comprising: joining a reinforcing material to a part of the metal plate before forming, and thereafter forming the metal plate.
（２）前記補強材が、成形において前記金属板の板厚が減少する部位に接合されることを特徴とする前記（１）の金属板の成形方法。 (2) The method for forming a metal plate according to (1), wherein the reinforcing material is joined to a portion where the thickness of the metal plate is reduced in the forming.
（３）前記金属板が引張強度が５９０ＭＰａ以上の高強度鋼板であることを特徴とする前記（１）又は（２）の金属板の成形方法。 (3) The method for forming a metal plate according to (1) or (2), wherein the metal plate is a high-strength steel plate having a tensile strength of 590 MPa or more.
（４）前記補強材が繊維強化プラスチックであることを特徴とする前記（１）〜（３）のいずれかの金属板の成形方法。 (4) The method for forming a metal plate according to any one of (1) to (3), wherein the reinforcing material is a fiber reinforced plastic.
（５）前記繊維強化プラスチックの繊維の方向が、前記金属板の破断耐力が必要な方向に沿うように接合されることを特徴とする前記（４）の金属板の成形方法。 (5) The method for forming a metal plate according to (4), wherein the fiber reinforced plastic fibers are joined so that the direction of the fibers is along a direction in which the breaking strength of the metal plate is required.
（６）前記補強材が高強度鋼箔であることを特徴とする前記（１）〜（３）のいずれかの金属板の成形方法。 (6) The method for forming a metal plate according to any one of (1) to (3), wherein the reinforcing material is a high-strength steel foil.
（７）前記（１）〜（６）のいずれかの高強度鋼板の成形方法で絞り成形したことを特徴とする成形品。 (7) A molded product, which is drawn by the method for forming a high-strength steel sheet according to any one of (1) to (6).
本発明によれば、金属板の成形において、金属板の材質、及び、成形工程を変えずに、破断耐力が必要な部位の破断耐力を高めて、金属板の成形性を向上させ、絞り成形中の破断を防止することができる。 According to the present invention, in forming a metal plate, without changing the material of the metal plate and the forming process, the breaking strength of the portion where the breaking strength is required is increased, the formability of the metal plate is improved, and the draw forming is performed. Breaking inside can be prevented.
本発明の金属板の成形方法は、金属板を成形する成形方法において、破断耐力が必要な部位（以下「破断懸念部位」という）に、あらかじめ、補強材を接合して絞り成形することを特徴とする。 The metal plate molding method of the present invention is characterized in that, in the molding method of molding a metal plate, a reinforcing material is previously drawn and drawn at a site where fracture strength is required (hereinafter referred to as “fracture concern site”). And
本発明の成形品は、本発明の成形方法で成形したことを特徴とする。 The molded article of the present invention is characterized by being molded by the molding method of the present invention.
本発明の成形方法について図面に基づいて説明する。 The molding method of the present invention will be described with reference to the drawings.
図２に、本発明の一例として、高強度鋼板の絞り成形において、破断耐力が必要な部位に、繊維強化プラスチックのシートを接合して破断を防止する態様を示す。 As an example of the present invention, FIG. 2 shows an embodiment in which a fiber reinforced plastic sheet is joined to a portion where a fracture strength is required in drawing of a high-strength steel sheet to prevent the fracture.
高強度鋼板のブランク材１を、ダイス２の中に、ブランクホルダー４でブランク材１のフランジ部１’を押圧しつつ、パンチ３で押し込んで絞り成形を行う。絞り成形は、パンチ３の肩部３’でのブランク材１の破断耐力と、ブランク材１のフランジ部１’に作用する引込み力との釣り合いのもとで進行する。 The blank material 1 made of high-strength steel sheet is drawn into the die 2 by pressing with the punch 3 while pressing the flange portion 1 ′ of the blank material 1 with the blank holder 4. Drawing is performed under a balance between the breaking strength of the blank 1 at the shoulder 3 ′ of the punch 3 and the pulling force acting on the flange 1 ′ of the blank 1.
そして、前述したように、フランジ部１’の変形抵抗６が、パンチ３の肩部３’に接するブランク材１の破断耐力と等しくなったとき、フランジ部１’の変形（ダイス２内への引き込まれ）が停止し、一方、パンチ３の肩部３’に接するブランク材１の部位のみで変形が進行して破断する（図１、参照）。 As described above, when the deformation resistance 6 of the flange portion 1 ′ becomes equal to the breaking strength of the blank material 1 in contact with the shoulder portion 3 ′ of the punch 3, the deformation of the flange portion 1 ′ (into the die 2). In other words, the deformation proceeds and breaks only at the portion of the blank 1 that contacts the shoulder 3 ′ of the punch 3 (see FIG. 1).
一方、図２に示す高強度鋼板の絞り成形においては、破断耐力が必要な部位７に、あらかじめ、補強材として繊維強化プラスチックのシート８を接合して絞り成形する。 On the other hand, in the drawing of the high-strength steel sheet shown in FIG. 2, a fiber-reinforced plastic sheet 8 as a reinforcing material is joined in advance to the portion 7 where the breaking strength is required and drawn.
ブランク材１の絞り成形において、絞り成形中に破断の懸念がある部位、すなわち、破断耐力が必要な部位７に繊維強化プラスチックのシート８を接合すると、破断耐力が必要な部位７において破断耐力が向上して、絞り成形中、ブランク材１は破断しない。 In drawing of the blank material 1, if a fiber reinforced plastic sheet 8 is joined to a portion where there is a risk of breaking during drawing, that is, a portion 7 that requires breaking strength, the breaking strength is obtained in the portion 7 that requires breaking strength. As a result, the blank material 1 does not break during the drawing.
図２は、高強度鋼板の絞り成形中、繊維強化プラスチックシート８が、破断耐力が必要な部位７に確実に接合して破断耐力向上機能を十分に発揮できるよう、繊維強化プラスチックシート８を、絞り成形品の底部を包むように接合した態様を示している。補強材を破断耐力が必要な部位に接合する態様は、図２に示す接合態様に限定されず、補強材を破断耐力が必要な部位に確実に接合する限りで、種々の接合態様を採用できる。この点については、別の接合態様を示して後述する。 FIG. 2 shows that during the drawing of a high-strength steel sheet, the fiber-reinforced plastic sheet 8 is bonded to a portion 7 that requires a breaking strength, and the fiber-reinforced plastic sheet 8 can be fully exhibited. The mode which joined so that the bottom part of a draw-molded article might be wrapped is shown. The manner in which the reinforcing material is joined to the site requiring the breaking strength is not limited to the joining mode shown in FIG. 2, and various joining modes can be adopted as long as the reinforcing material is reliably joined to the site requiring the breaking strength. . This point will be described later with another joining mode.
成形品に、成形品の形状に合わせて、別途、成形した炭素繊維強化プラスチック（ＣＦＲＰ、Carbon Fiber Reinforced Plastic）のシート又はパッチを接着し、成形品の機械特性又は機能性を高める又は補強する手法は知られている（例えば、平成２２年度戦略的基盤技術高度化支援事業報告書「自動車構造部材用ＣＦＲＰ−金属ハイブリッド部品のプレス成形加工技術に関する研究」、及び、平成２６年度塑性加工春季講演会で発表「筒状態の衝撃曲げ変形におけるＣＦＲＰ板の補強効果に関する基礎的検討」、参照）。 A method of enhancing or reinforcing the mechanical properties or functionality of the molded product by bonding a separately molded carbon fiber reinforced plastic (CFRP) sheet or patch to the molded product according to the shape of the molded product. Is known (for example, FY2010 Strategic Fundamental Technology Advancement Support Business Report “Research on CFRP-Metal Hybrid Parts Press Forming Technology for Automotive Structural Members” and 2014 Plastic Processing Spring Lecture (See “Fundamental study on reinforcement effect of CFRP plate in impact bending deformation in cylindrical state”).
しかし、本発明の成形方法は、被成形素材（ブランク材）に補強材を成形前に接合して一体化し、該シート又はパッチを接合した部位の成形性を高めることを基本思想とするものであり、この点で、本発明成形方法は、成形後に、成形品に繊維強化プラスチックのシート又はパッチを接着し、成形品の機械特性又は機能性を高める又は補強する上記手法とは基本的に異なるものである。 However, the molding method of the present invention is based on the basic idea that the reinforcing material is joined to the material to be molded (blank material) and integrated before molding, and the formability of the part where the sheet or patch is joined is improved. In this respect, the molding method of the present invention is fundamentally different from the above-described method in which after molding, a fiber-reinforced plastic sheet or patch is bonded to the molded product to enhance or reinforce the mechanical properties or functionality of the molded product. Is.
ブランク材１の成形において、成形中に破断の懸念がある部位、すなわち、破断耐力が必要な部位に繊維強化プラスチックシートを接合すると、破断耐力が必要な部位において破断耐力が向上して、成形中、ブランク材が破断しないことは、本発明者らが見出した新規な知見であり、本発明の成形方法の特徴である。 In the molding of the blank material 1, when a fiber reinforced plastic sheet is joined to a site where there is a risk of fracture during molding, that is, a site where fracture strength is required, the fracture strength is improved at the site where fracture strength is required, The fact that the blank material does not break is a new finding found by the present inventors and is a feature of the molding method of the present invention.
図３は、高強度鋼板の絞り成形において、破断耐力が必要な部位に、繊維強化プラスチックのパッチを接合した態様を示す。図３（ａ）は、破断耐力が必要な環状部位に、環状の繊維強化プラスチックのパッチを接合した態様であり、図３（ｂ）は、図３（ａ）に示すブランク材を絞り成形した成形品の断面を示す。 FIG. 3 shows a mode in which a fiber reinforced plastic patch is joined to a portion where fracture strength is required in the drawing of a high strength steel plate. FIG. 3 (a) is an embodiment in which an annular fiber-reinforced plastic patch is joined to an annular portion that requires breaking strength. FIG. 3 (b) is a drawing of the blank shown in FIG. 3 (a). The cross section of a molded product is shown.
図３（ａ）に示すブランク材１においては、絞り成形中に破断の懸念がある部位、すなわち、パンチの肩部に当接し、破断耐力が必要な環状の部位を覆うように、補強材として、環状の繊維強化プラスチックシート８ａが接合されている。 In the blank 1 shown in FIG. 3 (a), as a reinforcing material so as to cover a portion where there is a risk of breakage during drawing, that is, an annular portion that contacts the shoulder portion of the punch and requires a breaking strength. The annular fiber reinforced plastic sheet 8a is joined.
図３（ａ）に示すように、高強度鋼板の絞り成形において、絞り成形中に破断の懸念がある部位、すなわち、パンチの肩部に当接し、破断耐力が必要な部位を、絞り成形前に特定することができれば、特定した部位の幅より幅広の繊維強化プラスチックのシートを、特定した部位を完全に覆うように接合して、該部位において破断耐力を高めて成形性の向上を図ることができる。 As shown in FIG. 3 (a), in drawing of a high-strength steel sheet, a portion that is likely to break during drawing, that is, a portion that is in contact with the shoulder of the punch and requires rupture strength, is drawn before drawing. If it can be specified, the fiber-reinforced plastic sheet wider than the specified part width is joined so as to completely cover the specified part, and the fracture resistance is increased at the part to improve the moldability. Can do.
図３（ｂ）に示すように、図３（ａ）に示すブランク材を絞り成形した成形品１ａにおいては、繊維強化プラスチックシート８ａを接合した、絞り成形中に破断の懸念がある部位、すなわち、パンチの肩部に当接し、破断耐力が必要な部位において、破断は生じない。 As shown in FIG. 3 (b), in the molded product 1a obtained by drawing the blank shown in FIG. 3 (a), the fiber-reinforced plastic sheet 8a is joined, and there is a possibility of breakage during drawing, No breakage occurs at the portion that contacts the shoulder portion of the punch and requires breaking strength.
図４に、高強度鋼板の絞り成形において、破断耐力が必要な部位に、繊維強化プラスチックパッチを接合した別の態様を示す。図４（ａ）に、破断耐力が必要な２重の環状部位に、環状の繊維強化プラスチックのパッチをそれぞれ接合した態様を示し、図４（ｂ）に、図４（ａ）に示すブランク材を絞り成形した成形品の断面を示す。 FIG. 4 shows another embodiment in which a fiber-reinforced plastic patch is joined to a portion where fracture strength is required in the drawing of a high-strength steel plate. FIG. 4 (a) shows an embodiment in which a patch of an annular fiber reinforced plastic is joined to each of the double annular portions that require breaking strength, and FIG. 4 (b) shows a blank material shown in FIG. 4 (a). A cross section of a molded product obtained by drawing is shown.
図４（ａ）に示すブランク材１においては、絞り成形中に破断の懸念がある部位、すなわち、パンチの肩部に当接し、破断耐力が必要な２重の環状部位をそれぞれ覆うように、環状の繊維強化プラスチックシート８ｂ及び８ｃが接合されている。 In the blank material 1 shown in FIG. 4 (a), a portion where there is a risk of breakage during draw forming, that is, abuts on the shoulder portion of the punch and covers each of the double annular portions that require breaking strength, Annular fiber-reinforced plastic sheets 8b and 8c are joined.
図４（ａ）に示すように、高強度鋼板の絞り成形において、絞り成形中に破断の懸念がある部位、すなわち、パンチの肩部に当接し、破断耐力が必要な部位が複数存在しても、該部位の位置を特定することができれば、特定した部位を完全に覆うように繊維強化プラスチックシートを接合して、上記特定した複数の部位において破断耐力を高めて成形性の向上を図ることができる。 As shown in FIG. 4 (a), in drawing of a high-strength steel sheet, there are a plurality of parts that are likely to break during drawing, that is, a part that contacts the shoulder of the punch and requires breaking strength. However, if the position of the part can be specified, the fiber reinforced plastic sheet is joined so as to completely cover the specified part, and the breaking strength is increased at the plurality of specified parts to improve the moldability. Can do.
図４（ｂ）に示すように、図４（ａ）に示すブランク材を絞り成形した成形品１ｂにおいては、繊維強化プラスチックのシート８ｂ及び８ｃを接合した、絞り成形中に破断の懸念がある部位、すなわち、パンチの肩部に当接し、破断耐力が必要な２重の環状部位において、破断は生じない。 As shown in FIG. 4 (b), in the molded product 1b obtained by drawing the blank shown in FIG. 4 (a), there is a fear of breakage during drawing, in which the fiber-reinforced plastic sheets 8b and 8c are joined. Breakage does not occur at the portion, that is, the double annular portion that contacts the shoulder portion of the punch and requires break strength.
図３及び図４には、円形のブランク材に軸対称の絞り成形を施す場合を示したが、ブランク材は円形のブランク材に限定されないし、また、絞り成形は、軸対称の絞り成形に限定されない。 FIGS. 3 and 4 show the case where the circular blank material is subjected to the axially symmetric drawing, but the blank material is not limited to the circular blank material, and the drawing is limited to the axially symmetric drawing. It is not limited.
本発明の成形方法によれば、破断耐力が必要な部位（破断懸念部位）の破断耐力が向上するので、ブランク材の形状の自由度、成形態様の自由度、及び、成形品の形状の自由度が大きく拡大する。 According to the molding method of the present invention, the fracture strength of a portion requiring fracture strength (fracture concern site) is improved. Therefore, the flexibility of the shape of the blank material, the flexibility of the molding mode, and the freedom of the shape of the molded product are improved. The degree greatly expands.
本発明の成形法においては、ブランク材の絞り成形中に破断の懸念がある部位、すなわち、パンチの肩部に当接し、破断耐力が必要な部位を特定することができれば、特定した部位を覆うように補強材を接合して、上記特定した部位において破断耐力を高めて破断を防止することができる。 In the molding method of the present invention, if a part that is likely to break during drawing of the blank material, that is, a part that contacts the shoulder of the punch and needs a breaking strength can be identified, the identified part is covered. In this way, the reinforcing material can be joined, and the breaking strength can be increased at the above specified portion to prevent the breaking.
図３及び図４に、破断耐力が必要な部位に補強材として環状の繊維強化プラスチックのシートを接合する態様を示す。補強材の形状は、特定の形状に限定されず、特定した破断耐力が必要な部位の形状、位置等に応じて適宜設定すればよい。 3 and 4 show an embodiment in which an annular fiber-reinforced plastic sheet is joined as a reinforcing material to a portion where fracture strength is required. The shape of the reinforcing material is not limited to a specific shape, and may be set as appropriate according to the shape, position, etc. of the portion requiring the specified breaking strength.
図３及び図４は、破断耐力が必要な部位の外側に、環状の繊維強化プラスチックのシートを接合する態様を示すが、補強材を接合する場所は、破断耐力が必要な部位の外側に限定されず、破断耐力が必要な部位の内側、外側、及び、両側のいずれでもよい。補強材を接合する場所は、破断耐力が必要な部位の形状、位置等に応じて適宜定めればよい。 3 and 4 show an embodiment in which an annular fiber-reinforced plastic sheet is joined to the outside of the portion where the breaking strength is required, but the place where the reinforcing material is joined is limited to the outside of the portion where the breaking strength is needed. It may be any of the inside, the outside, and both sides of the portion where the breaking strength is required. The location where the reinforcing material is joined may be determined as appropriate according to the shape, position, etc. of the portion that requires fracture strength.
さらに、補強材を、破断耐力が必要な部位に接合する場合、適宜分割して接合してもよい。 Furthermore, when joining a reinforcing material to the site | part which needs a breaking strength, you may divide | segment appropriately and may join.
図５に、破断耐力が必要な環状部位に、補強材である環状の繊維強化プラスチックを分割して接合した態様を示す。図５においては、環状の繊維強化プラスチックを４分割して、繊維強化プラスチック８ａ'を環状に並べて接合している。 FIG. 5 shows an embodiment in which an annular fiber-reinforced plastic, which is a reinforcing material, is divided and joined to an annular portion that requires breaking strength. In FIG. 5, the annular fiber reinforced plastic is divided into four, and the fiber reinforced plastics 8a ′ are arranged in a circle and joined.
補強材を分割して接合する場合、分割態様は、特定した破断耐力が必要な部位の形状、位置等に応じて適宜設定すればよい。 When the reinforcing material is divided and joined, the division mode may be set as appropriate according to the shape, position, etc. of the portion requiring the specified breaking strength.
以上、本発明の成形方法を絞り成形を例に説明した。本発明の成形方法は、絞り成形に限定されるものではなく、図６〜９に示すような、種々の成形においても適用可能である。図６〜９に、種々の成形における破断懸念部位を示す。図６は深絞り成形、図７は伸びフランジ成形、図８は曲げ成形、図９は張り出し成形を示す。このような一般的な成形であれば、破断懸念部位の予測は比較的容易である。 The forming method of the present invention has been described above by taking the drawing method as an example. The molding method of the present invention is not limited to drawing, and can be applied to various moldings as shown in FIGS. In FIGS. 6-9, the fracture | rupture fear site | part in various shaping | molding is shown. 6 shows deep drawing, FIG. 7 shows stretch flange forming, FIG. 8 shows bending forming, and FIG. 9 shows stretch forming. With such general molding, it is relatively easy to predict a site where the fracture is likely to occur.
具体的には、深絞り成形であればパンチ肩６１、伸びフランジ成形であればフランジ端７１、曲げ成形であれば曲げ部位８１、張出し成形であれば、パンチ張り出し部位９１が破断懸念部位となる。したがって、金属板を成形する前に、成形時にこの部位となる位置を覆うように補強材を接合し、成形を行えばよい。 Specifically, the punch shoulder 61 is a deep drawing molding, the flange end 71 is a stretch flange molding, the bending portion 81 is a bending molding, and the punch overhanging portion 91 is a fracture concern portion in an overhang molding. . Therefore, before molding the metal plate, the reinforcing material may be joined and molded so as to cover the position to be the part at the time of molding.
破断耐力が必要な部位の予測が難しい複雑な形状の金属板の成形の場合は、図１０に示すように、ＣＡＥ（computer aided engineering）により補強材を使用しない場合に板厚が減少する破断懸念部位を予測し、破断懸念部位に補強材を接合した場合の成形を再度ＣＡＥで解析することにより、補強材を接合する位置を確定すればよい。 In the case of forming a metal plate having a complicated shape where it is difficult to predict the site where the breaking strength is required, as shown in FIG. 10, there is a concern that the plate thickness decreases when a reinforcing material is not used by CAE (computer aided engineering). The position where the reinforcing material is joined may be determined by predicting the site and analyzing the molding when the reinforcing material is joined to the fracture-prone site by CAE again.
補強材は、成形の際に、破断懸念部位にかかる応力を負担できるものであれば、特に材質は問わない。強度と扱いやすさを考慮すると、繊維強化プラスチックのシートや、高強度鋼箔を用いるのが好ましい。繊維強化プラスチックは繊維で強化されたプラスチックであればよく、特定の繊維やプラスチックに限定されない。好適な例としては、炭素繊維強化プラスチックが挙げられる。高強度鋼箔としては、常温での引張強度が６００ＭＰａ以上となる鋼箔が例示できる。 The reinforcing material is not particularly limited as long as it can bear the stress applied to the site of fear of fracture during molding. Considering strength and ease of handling, it is preferable to use a fiber reinforced plastic sheet or a high strength steel foil. The fiber reinforced plastic may be any plastic reinforced with fiber, and is not limited to a specific fiber or plastic. Suitable examples include carbon fiber reinforced plastics. An example of the high strength steel foil is a steel foil having a tensile strength at room temperature of 600 MPa or more.
補強材として繊維強化プラスチックを用いる場合、繊維強化プラスチックの繊維の方向が、破断耐力が必要な方向に沿うように、具体的には、発生する亀裂を横断するように接合することが好ましい。 When fiber reinforced plastic is used as the reinforcing material, it is preferable that the fibers of the fiber reinforced plastic are joined so as to be along a direction where the breaking strength is required, specifically, across the generated crack.
補強材は、破断耐力が必要な部位において破壊耐力の向上を図るものであるから、所要の厚さが必要であるが、特定の厚さに限定されない。補強材の厚さは、ブランク材の材質、絞り成形態様、成形品の形状等を考慮して適宜設定すればよい。 Since the reinforcing material is intended to improve the fracture strength at a site where the fracture strength is required, the required thickness is required, but it is not limited to a specific thickness. The thickness of the reinforcing material may be appropriately set in consideration of the material of the blank material, the drawing mode, the shape of the molded product, and the like.
破断耐力が必要な部位に、補強材を接合したブランク材を成形した成形品は、用途に応じ、補強材を取り除いて使用してもよいし、また、補強材を接合したまま使用してもよい。 Depending on the application, the molded product obtained by molding the blank material with the reinforcing material joined to the site where the rupture strength is required may be used with the reinforcing material removed, or may be used with the reinforcing material joined. Good.
それゆえ、破断耐力が必要な部位に、補強材を接合する場合の接合強度は、成形品の用途に応じて適宜選択すればよい。 Therefore, the joining strength in the case where the reinforcing material is joined to the portion where the breaking strength is required may be appropriately selected according to the use of the molded product.
補強材を破断耐力が必要な部位に接合する方法は、特に限定されない。補強材が繊維強化プラスチックである場合、接着剤や樹脂を用いるのが好ましい。接着剤や樹脂の種類は特に限定されず、成形品から、補強材を取り外すか、又は、そのままするかを考慮して、接着剤を適宜選択すればよい。補強材が高強度鋼箔であって、成形品から補強材を取り外す必要がなければ、拡散接合により接合しても構わない。 There is no particular limitation on the method for joining the reinforcing material to the portion requiring the breaking strength. When the reinforcing material is a fiber reinforced plastic, it is preferable to use an adhesive or a resin. The type of the adhesive or resin is not particularly limited, and the adhesive may be appropriately selected in consideration of whether the reinforcing material is removed from the molded product or left as it is. If the reinforcing material is a high-strength steel foil and it is not necessary to remove the reinforcing material from the molded product, it may be joined by diffusion bonding.
ここで、補強材を接合することにより破断耐力が向上して成形性が向上する機構について説明する。 Here, a mechanism in which the fracture strength is improved and the formability is improved by joining the reinforcing material will be described.
一般に、ブランク材をダイスとパンチで絞り成形する場合、パンチの肩部に当接するブランク材の破断耐力：Ｐbreakは、下記式（１）で算出できる（塑性加工技術シリーズ１３「プレス絞り加工−工程設計と型設計−」（コロナ社）、２３頁、参照）。
Ｐbreak＝２πＲｔ0Ｆ｛２(ｒ＋１)(ｒ＋２)／３(２ｒ＋１)｝(n+1)/2（ｎ／ｅ）n
・・・（１）
Ｒ：パンチの半径
ｔ0：ブランク材の厚さ
ｒ：ランクフォード値
ｅ：ネイピア数（自然対数の底）
Ｆ、ｎ：Swiftの式のパラメーターIn general, when a blank is drawn with a die and a punch, the breaking strength of the blank that abuts against the shoulder of the punch: Pbreak can be calculated by the following formula (1) (Plastic Processing Technology Series 13 “Press Drawing Process-Process Design and mold design "(Corona), page 23).
Pbreak = 2πRt 0 F {2 (r + 1) (r + 2) / 3 (2r + 1)} (n + 1) / 2 (n / e) n
... (1)
R: Radius of punch t 0 : Thickness of blank material r: Rankford value e: Napier number (base of natural logarithm)
F, n: Swift equation parameters
ブランク材の破断懸念部位（絞り成形中に破断の懸念がある部位）、すなわち、パンチの肩部に当接し、破断耐力が必要な部位を、補強材で補強したときのブランク材の破断耐力：Ｐ'breakは、下記式（２）で定義することができる。
Ｐ'break＝Ｐbreak＋２πＲｔfrpＴＳfrp ・・・（２）
Ｐ'break：パンチの肩部に当接するブランク材の破断耐力
Ｒ：パンチの半径
ｔfrp：補強材の厚さ
ＴＳfrp：補強材の引張強度Breaking strength of blank material when it is reinforced with a reinforcing material at a portion of the blank material where there is a risk of breaking during drawing, that is, a portion that contacts the shoulder of the punch and requires rupture strength: P′break can be defined by the following formula (2).
P'break = Pbreak + 2πRt frp TS frp (2)
P'break: Breaking strength of blank material in contact with punch shoulder R: Punch radius t frp : Reinforcement thickness TS frp : Reinforcement tensile strength
上記式（２）に示すように、ブランク材の破断懸念部位に、繊維強化プラスチックのシート又はパッチを補強材として接合すれば、接合後の破壊耐力：Ｐ'breakは、ブランク材の破壊耐力：Ｐbreakを超えるので、上記破断懸念部位において成形性の向上を見込むことができる。このように、本発明の成形方法は、理論的にも裏付けることができる。 As shown in the above formula (2), if a fiber reinforced plastic sheet or patch is joined as a reinforcing material to a portion where the blank material is likely to break, the fracture strength after joining: P′break is the fracture strength of the blank material: Since Pbreak is exceeded, the improvement of moldability can be expected at the above-described site where the fracture is likely to occur. Thus, the molding method of the present invention can be theoretically supported.
本発明の成形方法は被加工材である金属板、成形内容によらず効果を発揮する。特に、成形性が低くなる傾向にある、引張強度が５９０ＭＰａ以上の高強度鋼板の成形には大きな効果を発揮する。 The forming method of the present invention is effective regardless of the metal plate that is the workpiece and the content of the forming. In particular, it has a great effect on forming a high-strength steel sheet having a tensile strength of 590 MPa or more, which tends to lower formability.
次に、本発明の実施例について説明するが、実施例での条件は、本発明の実施可能性及び効果を確認するために採用した一条件例であり、本発明は、この一条件例に限定されるものではない。本発明は、本発明の要旨を逸脱せず、本発明の目的を達成する限りにおいて、種々の条件を採用し得るものである。 Next, examples of the present invention will be described. The conditions in the examples are one example of conditions used for confirming the feasibility and effects of the present invention, and the present invention is based on this one example of conditions. It is not limited. The present invention can adopt various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.
（実施例）
図１１に示すように、厚さ１．０ｍｍ、直径１０８ｍｍのブランク材（デュアルフェーズ鋼）１１２の上に、厚さ０．７ｍｍ、直径５８ｍｍの接着剤シート（ポリプロピレン樹脂シート）１１３と、厚さ０．２３ｍｍ、直径５８ｍｍの炭素繊維強化プラスチックのシート１１１を、この順序で重ね、温間圧着機１１４で、１８０℃で１分加熱した後、０．０４９ＭＰａ（≒５ｔｏｎｆ／ｍ２）で１分加圧して空冷し、炭素繊維強化プラスチック１１１をブランク材１１２に接合した。(Example)
As shown in FIG. 11, an adhesive sheet (polypropylene resin sheet) 113 having a thickness of 0.7 mm and a diameter of 58 mm is formed on a blank material (dual phase steel) 112 having a thickness of 1.0 mm and a diameter of 108 mm, and a thickness. A carbon fiber reinforced plastic sheet 111 having a diameter of 0.23 mm and a diameter of 58 mm is stacked in this order, heated with a warm pressure bonding machine 114 at 180 ° C. for 1 minute, and then at 0.049 MPa (≈5 tonf / m 2 ) for 1 minute. The carbon fiber reinforced plastic 111 was joined to the blank 112 by pressurizing and air cooling.
炭素繊維強化プラスチック１１１を接合したブランク材１１２を、比較例で用いたパンチとダイスを用いて絞り成形した。 The blank material 112 to which the carbon fiber reinforced plastic 111 was bonded was drawn using the punch and the die used in the comparative example.
（比較例）
板厚１．０ｍｍ、直径１０８ｍｍのブランク材（デュアルフェーズ鋼）を、次のパンチとダイスを用いて絞り成形した。
パンチ肩：Ｒ５ パンチ直径：５０ｍｍ
ダイス肩：Ｒ５ ダイス直径：６０ｍｍ
ブランクホルダー圧：０．０９８ＭＰａ（≒１０ｔｏｎｆ／ｍ２）(Comparative example)
A blank material (dual phase steel) having a plate thickness of 1.0 mm and a diameter of 108 mm was drawn using the following punch and die.
Punch shoulder: R5 Punch diameter: 50mm
Die shoulder: R5 Die diameter: 60mm
Blank holder pressure: 0.098 MPa (≈10 tonf / m 2 )
結果を、図１２に示す。（ａ）が、破断耐力が必要な部位に、繊維強化プラスチックのシートを接合しないで絞り成形した比較例であり、（ｂ）が、破断耐力が必要な部位に、繊維強化プラスチックのシートを接合して絞り成形した実施例の結果である。 The results are shown in FIG. (A) is a comparative example in which a fiber reinforced plastic sheet is not joined to a part where the breaking strength is required, and (b) is a fiber reinforced plastic sheet that is joined to a part requiring the breaking strength. It is the result of the Example which carried out drawing molding.
本発明によれば、金属板の成形において、金属板の材質、及び、成形工程を変えずに、破断耐力が必要な部位の破断耐力を高めて、金属板の成形性を向上させ、成形中の破断を防止することができる。本発明は被加工材である金属板、成形内容によらず効果を発揮する。特に、成形性が低くなる傾向にある、高強度鋼板の絞り成形、張出し成形、伸びフランジ成形、曲げ成形には大きな効果を発揮する。本発明は、金属製品製造産業において利用可能性が高いものである。 According to the present invention, in forming a metal plate, without changing the material of the metal plate and the forming process, the breaking strength of the portion where the breaking strength is required is increased, the formability of the metal plate is improved, Can be prevented from breaking. The present invention exerts an effect regardless of the metal plate as a workpiece and the content of molding. In particular, it has a great effect on drawing, stretch forming, stretch flange forming, and bending forming of high strength steel sheets that tend to have low formability. The present invention has high applicability in the metal product manufacturing industry.
１ ブランク材
１’ フランジ部
１ａ、１ｂ 成形品
２ ダイス
３ パンチ
３’ 肩部
４ ブランクホルダー
５ 破断
６ 変形抵抗
７ 破断耐力が必要な部位
８ 繊維強化プラスチックのシート
８ａ、８ａ' 繊維強化プラスチックの補強材
８ｂ、８ｃ 繊維強化プラスチックの補強材
６１ パンチ肩
７１ フランジ端
８１ 曲げ部位
９１ パンチ張り出し部位
１１１ 炭素繊維強化プラスチックのシート
１１２ ブランク材
１１３ 接着剤シート
１１４ 温間圧着機DESCRIPTION OF SYMBOLS 1 Blank material 1 'Flange part 1a, 1b Molded product 2 Dies 3 Punch 3' Shoulder part 4 Blank holder 5 Breaking 6 Deformation resistance 7 The part which needs breaking strength 8 Sheet of fiber reinforced plastic 8a, 8a 'Reinforcement of fiber reinforced plastic Material 8b, 8c Reinforcing material for fiber reinforced plastic 61 Punch shoulder 71 Flange end 81 Bending part 91 Punch overhanging part 111 Carbon fiber reinforced plastic sheet 112 Blank material 113 Adhesive sheet 114 Warm pressure bonding machine
Claims (7)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2015031029 | 2015-02-19 | ||
| JP2015031029 | 2015-02-19 | ||
| PCT/JP2016/054936 WO2016133210A1 (en) | 2015-02-19 | 2016-02-19 | Method of shaping metal plate, and shaped product |
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| JPWO2016133210A1 true JPWO2016133210A1 (en) | 2017-12-07 |
| JP6477860B2 JP6477860B2 (en) | 2019-03-06 |
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| JP2017500765A Active JP6477860B2 (en) | 2015-02-19 | 2016-02-19 | Metal plate forming method |
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| US (1) | US20180021835A1 (en) |
| EP (1) | EP3260214A4 (en) |
| JP (1) | JP6477860B2 (en) |
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| MY (1) | MY189189A (en) |
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| JP6583305B2 (en) * | 2017-02-20 | 2019-10-02 | Ｊｆｅスチール株式会社 | Forming method of flanged hole shape |
| JP6614183B2 (en) * | 2017-02-27 | 2019-12-04 | トヨタ自動車株式会社 | Automotive panel materials |
| KR102428824B1 (en) | 2019-12-11 | 2022-08-02 | 주식회사 포스코 | Metal-plastic composite material and method for manufacturing the same |
| CN112605219B (en) * | 2020-11-27 | 2022-04-01 | 广州纬华节能设备有限公司 | Stretching method of dual-phase steel |
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Also Published As
| Publication number | Publication date |
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| EP3260214A1 (en) | 2017-12-27 |
| TW201808486A (en) | 2018-03-16 |
| TW201703896A (en) | 2017-02-01 |
| CA2976626C (en) | 2020-01-21 |
| BR112017017544A2 (en) | 2018-04-17 |
| RU2682736C2 (en) | 2019-03-21 |
| WO2016133210A1 (en) | 2016-08-25 |
| MY189189A (en) | 2022-01-31 |
| RU2017132459A3 (en) | 2019-03-20 |
| JP6477860B2 (en) | 2019-03-06 |
| EP3260214A4 (en) | 2018-11-14 |
| TWI640373B (en) | 2018-11-11 |
| US20180021835A1 (en) | 2018-01-25 |
| RU2017132459A (en) | 2019-03-20 |
| CA2976626A1 (en) | 2016-08-25 |
| KR20170103938A (en) | 2017-09-13 |
| MX2017010644A (en) | 2017-11-23 |
| KR102017970B1 (en) | 2019-09-03 |
| CN107427888A (en) | 2017-12-01 |
| CN107427888B (en) | 2021-02-19 |
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