WO2016133210A1 - 金属板の成形方法及び成形品 - Google Patents

金属板の成形方法及び成形品 Download PDF

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Publication number
WO2016133210A1
WO2016133210A1 PCT/JP2016/054936 JP2016054936W WO2016133210A1 WO 2016133210 A1 WO2016133210 A1 WO 2016133210A1 JP 2016054936 W JP2016054936 W JP 2016054936W WO 2016133210 A1 WO2016133210 A1 WO 2016133210A1
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WO
WIPO (PCT)
Prior art keywords
metal plate
forming
strength
joined
reinforced plastic
Prior art date
Application number
PCT/JP2016/054936
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
雅寛 斎藤
吉田　亨
Original Assignee
新日鐵住金株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 新日鐵住金株式会社 filed Critical 新日鐵住金株式会社
Priority to RU2017132459A priority Critical patent/RU2682736C2/ru
Priority to BR112017017544-4A priority patent/BR112017017544A2/pt
Priority to KR1020177022511A priority patent/KR102017970B1/ko
Priority to US15/551,761 priority patent/US20180021835A1/en
Priority to MX2017010644A priority patent/MX2017010644A/es
Priority to MYPI2017702977A priority patent/MY189189A/en
Priority to CN201680010744.9A priority patent/CN107427888B/zh
Priority to CA2976626A priority patent/CA2976626C/en
Priority to JP2017500765A priority patent/JP6477860B2/ja
Priority to EP16752596.3A priority patent/EP3260214A4/de
Publication of WO2016133210A1 publication Critical patent/WO2016133210A1/ja

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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

Definitions

  • 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.
  • the formability 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.
  • FIG. 1 shows a state of fracture at the shoulder of the punch in drawing 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.
  • 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.
  • Patent Document 1 proposes a method of press forming by providing two or more weld beads at a location where a reduction in the thickness of the blank material is expected when the blank material is press formed.
  • 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.
  • 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.
  • the material becomes brittle at the welding heat input portion of the blank material, and the material of the blank material becomes non-uniform, so it is difficult to completely avoid the breakage of the blank material during press molding.
  • Patent Documents 1 and 2 disclose material change (strengthening) by partial quenching and joining of heterogeneous materials as material improvements for high-strength steel sheets.
  • material change stressening
  • Patent Documents 1 and 2 disclose material change (strengthening) by partial quenching and joining of heterogeneous materials as material improvements for high-strength steel sheets.
  • an increase in molding cost and a decrease in productivity are unavoidable.
  • this invention makes it a subject to shape
  • 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 (Reinforcinginmaterial) 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.
  • a reinforcing material Reinforcinginmaterial
  • the present invention has been made on the basis of the above findings, and the gist thereof is as follows.
  • 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.
  • 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.
  • (A) shows the aspect which joined the cyclic
  • (b) shows the cross section of the molded article which draw-formed the blank material shown to (a). It is a figure which shows another aspect which joined the fiber reinforced plastic as a reinforcing material to the site
  • (A) shows the aspect which joined each of the cyclic
  • (b) is a cross section of the molded article which draw-molded the blank material shown to (a). Indicates.
  • 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
  • the molded product of the present invention is characterized by being molded by the molding method of the present invention.
  • FIG. 2 shows, as an example of the present invention, a mode 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 plate to prevent the fracture.
  • a blank material 1 made of high-strength steel sheet is drawn into a die 2 by pressing with a punch 3 while pressing a flange portion 1 ′ of the blank material 1 with a 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.
  • 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).
  • a sheet 8 of fiber-reinforced plastic is joined in advance as a reinforcing material to the portion 7 where the breaking strength is required, and then drawn.
  • 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.
  • CFRP Carbon Fiber Reinforced Plastic
  • 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.
  • 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.
  • FIG. 3 shows a state 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 sheet.
  • 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.
  • FIG. 4 shows another embodiment in which a fiber reinforced plastic patch is joined to a portion where fracture strength is required in drawing of a high strength steel sheet.
  • 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
  • FIG. 4 (b) shows a blank material shown in FIG. 4 (a). A cross section of a molded product obtained by drawing is shown.
  • Annular fiber-reinforced plastic sheets 8b and 8c are joined.
  • 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.
  • the fracture strength of a portion requiring fracture strength 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.
  • 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.
  • FIG 3 and 4 show a mode 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.
  • FIG 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.
  • the reinforcing material when the reinforcing material is joined to a portion where the breaking strength is required, the reinforcing material may be appropriately divided and joined.
  • FIG. 5 shows an embodiment in which an annular fiber reinforced plastic as a reinforcing material is divided and joined to an annular portion that requires breaking strength.
  • the annular fiber reinforced plastic is divided into four, and the fiber reinforced plastics 8a ′ are arranged in a circle and joined.
  • the division mode may be set as appropriate according to the shape, position, etc. of the part requiring the specified breaking strength.
  • FIGS. 6 to 9 show sites of fear of fracture in various moldings. 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.
  • 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
  • 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.
  • 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.
  • the material of 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.
  • the fiber reinforced plastic is bonded so that the direction of the fiber is along the direction where the breaking strength is required, specifically, across the generated crack.
  • 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.
  • 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.
  • the method for joining the reinforcing material to the portion requiring the breaking strength there is no particular limitation on the method for joining the reinforcing material to the portion requiring the breaking strength.
  • the reinforcing material is a fiber reinforced plastic
  • 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.
  • 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 2 ⁇ Rt 0 F ⁇ 2 (r + 1) (r + 2) / 3 (2r + 1) ⁇ (n + 1) / 2 (n / e) n ...
  • 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
  • P′break can be defined by the following formula (2).
  • P'break Pbreak + 2 ⁇ Rt 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
  • the forming method of the present invention is effective regardless of the metal plate as 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.
  • 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.
  • 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.
  • the blank material 112 joined with the carbon fiber reinforced plastic 111 was drawn using the punch and the die used in the comparative example.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Resistance Welding (AREA)
  • Table Devices Or Equipment (AREA)
  • Laminated Bodies (AREA)
  • Forging (AREA)
PCT/JP2016/054936 2015-02-19 2016-02-19 金属板の成形方法及び成形品 WO2016133210A1 (ja)

Priority Applications (10)

Application Number Priority Date Filing Date Title
RU2017132459A RU2682736C2 (ru) 2015-02-19 2016-02-19 Способ формования металлического листа и формованная деталь
BR112017017544-4A BR112017017544A2 (pt) 2015-02-19 2016-02-19 método de conformação de lâmina metálica e produto conformado
KR1020177022511A KR102017970B1 (ko) 2015-02-19 2016-02-19 금속판의 성형 방법 및 성형품
US15/551,761 US20180021835A1 (en) 2015-02-19 2016-02-19 Method of forming metal sheet and formed part
MX2017010644A MX2017010644A (es) 2015-02-19 2016-02-19 Metodo para conformar placa de metal y producto conformado.
MYPI2017702977A MY189189A (en) 2015-02-19 2016-02-19 Abstract method of spot welding
CN201680010744.9A CN107427888B (zh) 2015-02-19 2016-02-19 金属板的成形方法及成形品
CA2976626A CA2976626C (en) 2015-02-19 2016-02-19 Method of forming metal sheet and formed part
JP2017500765A JP6477860B2 (ja) 2015-02-19 2016-02-19 金属板の成形方法
EP16752596.3A EP3260214A4 (de) 2015-02-19 2016-02-19 Verfahren zur formung einer metallplatte und formprodukt

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-031029 2015-02-19
JP2015031029 2015-02-19

Publications (1)

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WO2016133210A1 true WO2016133210A1 (ja) 2016-08-25

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US (1) US20180021835A1 (de)
EP (1) EP3260214A4 (de)
JP (1) JP6477860B2 (de)
KR (1) KR102017970B1 (de)
CN (1) CN107427888B (de)
BR (1) BR112017017544A2 (de)
CA (1) CA2976626C (de)
MX (1) MX2017010644A (de)
MY (1) MY189189A (de)
RU (1) RU2682736C2 (de)
TW (2) TWI640373B (de)
WO (1) WO2016133210A1 (de)

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JP2018134645A (ja) * 2017-02-20 2018-08-30 Ｊｆｅスチール株式会社 フランジ付き穴形状の成形方法
CN108502030A (zh) * 2017-02-27 2018-09-07 丰田自动车株式会社 用于汽车的面板构件
US11993056B2 (en) 2019-12-11 2024-05-28 Posco Metal-plastic composite material and method for manufacturing same

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CN112605219B (zh) * 2020-11-27 2022-04-01 广州纬华节能设备有限公司 一种双相钢拉伸方法

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Publication number Priority date Publication date Assignee Title
JP2018134645A (ja) * 2017-02-20 2018-08-30 Ｊｆｅスチール株式会社 フランジ付き穴形状の成形方法
CN108502030A (zh) * 2017-02-27 2018-09-07 丰田自动车株式会社 用于汽车的面板构件
US10464615B2 (en) 2017-02-27 2019-11-05 Toyota Jidosha Kabushiki Kaisha Panel member for automobile
CN108502030B (zh) * 2017-02-27 2020-08-28 丰田自动车株式会社 用于汽车的面板构件
US11993056B2 (en) 2019-12-11 2024-05-28 Posco Metal-plastic composite material and method for manufacturing same

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JPWO2016133210A1 (ja) 2017-12-07
EP3260214A1 (de) 2017-12-27
TW201808486A (zh) 2018-03-16
TW201703896A (zh) 2017-02-01
CA2976626C (en) 2020-01-21
BR112017017544A2 (pt) 2018-04-17
RU2682736C2 (ru) 2019-03-21
MY189189A (en) 2022-01-31
RU2017132459A3 (de) 2019-03-20
JP6477860B2 (ja) 2019-03-06
EP3260214A4 (de) 2018-11-14
TWI640373B (zh) 2018-11-11
US20180021835A1 (en) 2018-01-25
RU2017132459A (ru) 2019-03-20
CA2976626A1 (en) 2016-08-25
KR20170103938A (ko) 2017-09-13
MX2017010644A (es) 2017-11-23
KR102017970B1 (ko) 2019-09-03
CN107427888A (zh) 2017-12-01
CN107427888B (zh) 2021-02-19

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