EP3778053A1 - Entwurfsverfahren für einen pressformgegenstand, pressformwerkzeug, pressformgegenstand und herstellungsverfahren für einen pressformgegenstand - Google Patents

Entwurfsverfahren für einen pressformgegenstand, pressformwerkzeug, pressformgegenstand und herstellungsverfahren für einen pressformgegenstand Download PDF

Info

Publication number
EP3778053A1
EP3778053A1 EP19778251.9A EP19778251A EP3778053A1 EP 3778053 A1 EP3778053 A1 EP 3778053A1 EP 19778251 A EP19778251 A EP 19778251A EP 3778053 A1 EP3778053 A1 EP 3778053A1
Authority
EP
European Patent Office
Prior art keywords
press
formed product
shape
curved portion
concave
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP19778251.9A
Other languages
English (en)
French (fr)
Other versions
EP3778053A4 (de
Inventor
Yuta Kariyazaki
Yuji Yamasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
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 JFE Steel Corp filed Critical JFE Steel Corp
Publication of EP3778053A1 publication Critical patent/EP3778053A1/de
Publication of EP3778053A4 publication Critical patent/EP3778053A4/de
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • B21D22/02—Stamping using rigid devices or tools
    • 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
    • B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
    • 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
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/04—Stamping using rigid devices or tools for dimpling
    • 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards

Definitions

  • the present invention relates to a method for designing a press-formed product, a press-forming die, a press-formed product, and a method for producing the press-formed product for suppressing shape defects such as falling and rising of an end of the press-formed product or overall twisting due to springback at the time when the press-formed product produced by press-forming a sheet material is removed from the press-forming die.
  • high-strength steel sheets have been more widely used in order to reduce the weight of automobile bodies for improved fuel efficiency.
  • the strength, rigidity and energy absorbed in a collision of an automobile body can be increased without increasing the sheet thickness.
  • springback occurs when a press-formed product produced by press-forming a steel sheet as a sheet material is removed from a press-forming die, and becomes larger when the material strength of the steel sheet increases.
  • the shape defect due to the springback not only impairs the external appearance quality, but also causes failure in welding at the time of assembly of an automobile body. Therefore, the expansion of the use of the high strength steel sheet requires springback measures.
  • the springback is caused by elastic recovery generated when a bending moment due to a non-uniform residual stress is released at the removal of a press-formed product from a die. Therefore, there has been proposed a method for mitigating the non-uniform residual stress and a method for reducing the springback by improving the rigidity of the press-formed product as a countermeasure for springback.
  • an additional shape may be arranged on an intermediate formed product or a final formed product in order to reduce bending moment, improve the rigidity of the press-formed product, control the flow rate of a material, and the like. There have been proposed some methods in which the additional shape is effectively arranged to reduce cracking or wrinkles of the press-formed product and improve the dimension accuracy thereof.
  • Patent Literature 1 proposes a method that, as an additional shape, an emboss is arranged on a stretch flange portion and an excess bead is formed on a shrink flange portion to form an intermediate formed product, and, in the subsequent forming of a final formed product, the emboss is crushed to give the stretch flange portion a compression stress and a tensile stress is applied to the shrink flange portion by the excess bead, such that the residual stress distribution of the press-formed product is made uniform.
  • Patent Literature 2 proposes a method that a plurality of groove shapes, as an additional shape, having a rectangular or circular cross-section are formed on a metal sheet along a longitudinal direction of a die shoulder, such that a bending/unbending deformation moment applied to the metal sheet when passing through the die shoulder and a residual stress in the metal sheet after passing are reduced to mitigate warpage deformation due to springback after unloading.
  • Patent Literature 3 proposes a method for forming a curved flange that is folded from the end of the curved panel to form a shrinking flange, wherein a plurality of convex shapes are formed on the flange along the longitudinal direction as an additional shape to absorb the compressive force generated in the flange in the longitudinal direction and to prevent the panel from being lowered due to springback in the flange.
  • Patent Literature 1 proposes a method that, as an additional shape, an emboss is formed on a stretch flange portion and an excess bead is formed on a shrink flange portion to make a residual stress uniform for reduction of the springback.
  • the springback is generated even by a low stress, and therefore, even a reduction in stress of a specific portion may be insufficient.
  • springback in another form can occur. Therefore, with a press-formed product having a low-rigidity shape, it is difficult to efficiently take a countermeasure for springback through stress control.
  • Patent Literature 2 proposes a method that groove shapes having a rectangular or circular cross-section are arranged on a metal sheet so that a residual stress in the metal sheet is reduced to mitigate warpage deformation after unloading.
  • Patent Literature 3 proposes a method that, in forming a panel with a curved flange to be a shrink flange, convex shapes are formed on the flange to suppress lowering of the panel, but does not particularly specify a curvature radius of the bent portion of the additional shape.
  • An additional shape protruding or recessed on a planar surface has, on a peripheral portion, a concave and convex curved shape having a substantially S-shaped cross-section where a concave curved portion and a convex curved portion are continuous.
  • Patent Literatures 2 and 3 do not describe a method for designing a curvature radius of a bent portion of a concave and convex curved shape in an additional shape.
  • a curvature radius has been changed to increase the area of a flat surface of a portion where high surface accuracy is required such as a joint portion, by decreasing the curvature radius of a bent portion, or to prevent cracking by increasing the curvature radius of the bent portion.
  • the larger the curvature radius the larger the springback amount (springback angle) in the bent portion.
  • the inventors of the present application have studied the relevance between the curvature radius of the bent portion and the springback amount, for springback measures with respect to a press-formed product with a low rigidity shape. As a result, the inventors have found that, when the curvature radius of the concave curved portion differs from that of the convex curved portion in a concave and convex curved shape having a substantially S-shaped cross-section where a concave curved portion and a convex curved portion are continuous, the springback amount generated in the concave curved portion differs from that in the convex curved portion, and thus planar portions on both sides of the concave and convex curved shape are not parallel after the springback, causing displacement in a height direction.
  • FIGS. 5(a) to 5(c) are explanatory views of a cross-section of planar portions on both sides of a concave and convex curved shape, illustrating a state at a press bottom dead center by a dotted line and a state after springback by a solid line
  • FIG. 5(a) illustrates the case where a curvature radius R1 of a concave curved portion is the same as a curvature radius R2 of a convex curved portion
  • FIG. 5(b) illustrates the case where the curvature radius R1 of the concave curved portion is larger than the curvature radius R2 of the convex curved portion
  • FIG. 5(c) illustrates the case where the curvature radius R1 of the concave curved portion is smaller than the curvature radius R2 of the convex curved portion.
  • the springback amounts (springback angles) of the concave curved portion and the convex curved portion are the same as indicated by the arrow.
  • the springback amount (springback angle) of the concave curved portion is larger than the springback amount (springback angle) of the convex curved portion as indicated by the arrow.
  • the springback amount (springback angle) of the concave curved portion is larger than the springback amount (springback angle) of the convex curved portion as indicated by the arrow.
  • the springback amount (springback angle) of the concave curved portion is larger than the springback amount (springback angle) of the convex curved portion as indicated by the arrow.
  • An object of the present invention is to provide a method for designing a press-formed product that can design a concave and convex curved shape effective for reducing a shape defect after the springback of a press-formed product with a low rigidity shape, a press-forming die and a press-formed product using the design method, and a method for producing the press-formed product.
  • a press-forming die of the present invention using the aforementioned design method is, in order to suppress a shape defect of a press-formed product due to springback at a time when the press-formed product is removed from a die, a press-forming die for producing a press-formed product provided with an additional shape having a concave and convex curved shape where a concave curved portion and a convex curved portion are continuous from a sheet material, characterized in that the press-forming die is provided with a die member including shoulder portions that each form the concave curved portion and the convex curved portion of the convex curved shape of the additional shape arranged on the press-formed product, and curvature radii of the shoulder portions of the die member are the same.
  • a press-formed product of the present invention using the aforementioned design method is, in order to suppress a shape defect of a press-formed product due to springback at a time when the press-formed product is removed from a die, a press-formed product produced by press-forming a sheet material and provided with an additional shape having a concave and convex curved shape where a concave curved portion and a convex curved portion are continuous, in which a curvature radius of the concave curved portion and a curvature radius of the convex curved portion of the concave and convex curved shape are the same.
  • a method for producing a press-formed product of the present invention is characterized in that:
  • the additional shape having the concave and convex curved shape where the concave curved portion and the convex curved portion are continuous is arranged on the press-formed product, and the curvature radius of the concave curved portion and the curvature radius of the convex curved portion of the concave and convex curved shape are set to be the same.
  • planar portions on both sides of the concave and convex curved shape of the press-formed product become parallel to each other after the springback, irrespective of the springback amount, and thus falling or rising of an end of the press-formed product and twisting of the press-formed product can be suppressed, resulting that and a shape defect of the press-formed product due to the springback can be suppressed.
  • the press-forming die of the present invention produces a press-formed product provided with the additional shape having the concave and convex curved shape where the concave curved portion and the convex curved portion are continuous from a sheet material, and is provided with a die member having shoulder portions that form the concave curved portion and the convex curved portion of the concave and convex curved shape, and curvature radii of cross-sections of the shoulder portions are the same.
  • the planar portions on both sides of the concave and convex curved shape of the press-formed product whose concave curved portion and convex curved portion are formed by the shoulder portions become parallel to each other after the springback irrespective of the springback amount, and falling or rising of an end of the press-formed product and twisting of the press-formed product can be suppressed, resulting that a shape defect of the press-formed product due to the springback can be suppressed.
  • the additional shape having the concave and convex curved shape where the concave curved portion and the convex curved portion are continuous is arranged, and the curvature radius of the concave curved portion and the curvature radius of the convex curved portion of the concave and convex curved shape are the same.
  • planar portions on both sides of the concave and convex curved shape of the press-formed product become parallel to each other after the springback, irrespective of the springback amount, and falling or rising of an end of the press-formed product and twisting of the press-formed product can be suppressed and a shape defect of the press-formed product due to the springback can be suppressed.
  • the additional shape having the concave and convex curved shape where the concave curved portion and the convex curved portion are continuous may be added to improve the rigidity of the press-formed product.
  • the rigidity of the press-formed product can be improved by the additional shape to reduce the springback amount, and the shape defect of the press-formed product due to the springback can be suppressed.
  • FIG. 1 is a perspective view illustrating a press-formed product of an embodiment of the present invention designed by a method for designing a press-formed product of an embodiment of the present invention.
  • FIGS. 2(a) and 2(b) are cross-sectional views of a rigidity shape of the press-formed product of the aforementioned embodiment along line A-A and line B-B of FIG. 1.
  • FIG. 3 is a plan view illustrating a height directional displacement distribution by a springback analysis of a press-formed product having an original shape, which is a comparative example, by displacement contour.
  • FIG. 4 is a plan view illustrating a height directional displacement distribution by a springback analysis of the press-formed product of the aforementioned embodiment by displacement contour.
  • reference numeral 1 denotes a press-formed product.
  • the method for designing a press-formed product according to the aforementioned embodiment is to design the press-formed product 1, which is a front pillar lower inner material as a type of a body part of an automobile, and the press-formed product 1 has a thin trapezoidal shape that is easy to bend and twist, i.e., a shape with low rigidity, when it is without additional shapes 2, 3 illustrated in FIG. 1 .
  • a press-formed product to be an automobile body part often has such low rigidity shape. Therefore, the press-formed product 1 is provided, on a planar surface of the thin trapezoidal shape, with two additional shapes 2, 3 having an elliptical shape in a plan view and a planar top surface, for improvement of the rigidity.
  • the additional shapes 2, 3 of the aforementioned press-formed product 1 each have, at a peripheral edge portion, a concave and convex curved shape 4 having a substantially S-shaped cross-section where a concave curved portion and a convex curved portion are continuous, as the cross-sectional shapes are illustrated in FIGS. 2(a) and (b) .
  • a radius R1 of the concave curved portion and a radius R2 of the convex curved portion of the concave and convex curved shape 4 are set to mutually different values, i.e., R1 > R2, as illustrated in FIG. 5(b) , for example.
  • the press-formed product 1 having the original shape is subjected to a press formation analysis and a springback analysis with a computer using known software.
  • a press formation analysis and a springback analysis with a computer using known software.
  • displacement contours based on a reference height point designated by reference symbol O in FIG. 3 it can be seen that falling occurs largely on the left side of the additional shape 3 because a negative Z-directional displacement is large, and that the press-formed product 1 is twisted in the upper left direction from the additional shape 2 because a negative Z-directional displacement is much larger.
  • the press-formed product 1 of the present embodiment in which the radius R1 of the concave curved portion and the radius R2 of the convex curved portion have the same value is subjected to a press formation analysis and a springback analysis with a computer using known software.
  • a press formation analysis and a springback analysis with a computer using known software.
  • a sheet material forming the press-formed product 1 of the present embodiment can be, for example, a 980 MPa-class high-tensile steel sheet having a thickness t: 0.9 mm, a yield point YP: 620 MPa, a tensile strength TS: 1030 MPa, and an elongation El: 15%.
  • the method for producing a press-formed product of an embodiment of the present invention uses a press-forming die of an embodiment of the present invention to press-form the steel sheet so as to form the press-formed product 1 of the aforementioned embodiment.
  • the press-forming die of the aforementioned embodiment includes, as a die member, a normal punch, die, and blank holder.
  • the die has a thin trapezoidal shape above outward flanges positioned, in FIG. 1 , at upper and lower ends of the press-formed product 1 and a concave portion having a shape that corresponds to the additional shapes 2, 3 protruding from a planar surface of the trapezoidal shape.
  • the blank holder holds a steel sheet between the blank holder and a plane surface extending outward from the concave portion of the die.
  • the punch pushes the steel sheet, which is held between the die and the blank holder, into the concave portion of the die to form the steel sheet into a thin trapezoidal shape, and pushes a convex portion of the leading end of the punch into the concave portion of the die so as to form the additional shapes 2, 3 by extrusion on the planar surface of the trapezoidal shape.
  • radii of cross-sectional shapes of shoulder portions of concave portions of the die of the press-forming die of the aforementioned embodiment that form the concave curved portions of the additional shapes 2, 3 are made to be substantially equal to the radius R1 of the concave curved portion, and radii of cross-sectional shapes of shoulder portions of convex portions of a leading end of the punch that form the convex curved portions of the additional shapes 2, 3 are made to be substantially equal to the radius R2 of the convex curved portion, such that the radii of the cross-sectional shapes of the shoulder portions are equal to each other.
  • the press-formed product 1 produced using the press-forming die of the aforementioned embodiment by the method for producing the press-formed product of the aforementioned embodiment becomes the press-formed product of the aforementioned embodiment in which the radius R1 of the concave curved portion and the radius R2 of the convex curved portion of the additional shapes 2, 3 are the same, and with the press-formed product and the method for producing the press-formed product of the present embodiment, falling or rising of an end of the press-formed product and twisting of the press-formed product due to the springback of the press-formed product can be suppressed, resulting that a shape defect of the press-formed product due to the springback can be suppressed.
  • the method for designing a press-formed product, the press-forming die, the press-formed product, and the method for producing the press-formed product of the present invention are not limited to the aforementioned embodiments, but can be appropriately changed within the scope of the claims.
  • the shape of the press-formed product or the additional shapes may be those other than those illustrated in FIG. 1
  • the concave and convex curved shape having the substantially S-shaped cross-section where the concave curved portion and the convex curved portion are continuous is not limited to the additional shape for improvement of the rigidity, but may be an additional shape for reduction of a bending moment, control of the flow rate of a material, and the like.
EP19778251.9A 2018-03-28 2019-02-25 Entwurfsverfahren für einen pressformgegenstand, pressformwerkzeug, pressformgegenstand und herstellungsverfahren für einen pressformgegenstand Pending EP3778053A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018062784 2018-03-28
PCT/JP2019/006934 WO2019187863A1 (ja) 2018-03-28 2019-02-25 プレス成形品の設計方法、プレス成形金型、プレス成形品およびプレス成形品の製造方法

Publications (2)

Publication Number Publication Date
EP3778053A1 true EP3778053A1 (de) 2021-02-17
EP3778053A4 EP3778053A4 (de) 2021-05-19

Family

ID=68061237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19778251.9A Pending EP3778053A4 (de) 2018-03-28 2019-02-25 Entwurfsverfahren für einen pressformgegenstand, pressformwerkzeug, pressformgegenstand und herstellungsverfahren für einen pressformgegenstand

Country Status (7)

Country Link
US (1) US20210023601A1 (de)
EP (1) EP3778053A4 (de)
JP (1) JP6738055B2 (de)
KR (1) KR102370794B1 (de)
CN (1) CN111801175B (de)
MX (1) MX2020010016A (de)
WO (1) WO2019187863A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023001962A1 (de) 2023-05-15 2023-12-21 Mercedes-Benz Group AG Gegenprägen einer Sicke in einem Blech

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022042636A (ja) * 2020-09-03 2022-03-15 プレス工業株式会社 車体フレーム用部材、及び車体フレーム用部材の製造方法

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07112219A (ja) * 1993-10-15 1995-05-02 Toyota Motor Corp 曲率のフランジを有する被加工体およびその成形型
JP3442122B2 (ja) * 1993-12-28 2003-09-02 本田技研工業株式会社 プレス成形方法
JPH08281335A (ja) 1995-04-06 1996-10-29 Nippon Steel Corp 形状凍結性に優れたプレス成形用金属板およびその成形方法
JP2004337980A (ja) * 2003-04-22 2004-12-02 Toyota Motor Corp チャンネル部品およびそのステップ形状の決定方法
JP2006272413A (ja) * 2005-03-30 2006-10-12 Kobe Steel Ltd 湾曲状チャンネル部材の成形方法
JP4724626B2 (ja) * 2006-08-31 2011-07-13 新日本製鐵株式会社 スプリングバック発生原因部位特定方法、その装置、及びそのプログラム
US9767234B2 (en) * 2006-08-31 2017-09-19 Nippon Steel & Sumitomo Metal Corporation Method of identification of cause and/or location of cause of occurrence of springback
JP5122789B2 (ja) * 2006-10-27 2013-01-16 東洋製罐株式会社 角形絞り容器およびその成形方法
DE102007053537A1 (de) * 2007-04-26 2008-10-30 Hyundai Motor Co. Sickenformungseinheit für eine Presse
JP5380890B2 (ja) * 2008-04-15 2014-01-08 新日鐵住金株式会社 形状凍結性に優れたプレス成形方法およびその装置
TWI438041B (zh) * 2008-09-30 2014-05-21 Nippon Steel & Sumitomo Metal Corp 成形模擬方法、成形模擬裝置、程式、記錄媒體及基於模擬結果之成形方法
JP5798432B2 (ja) * 2011-10-03 2015-10-21 近畿車輌株式会社 鉄道車両構体用外板
JP5887554B2 (ja) * 2012-02-29 2016-03-16 パナソニックＩｐマネジメント株式会社 発光装置及び照明器具
CN102744298B (zh) * 2012-07-24 2015-08-26 三江瓦力特特种车辆有限公司 一种零件的折弯方法
TWI628013B (zh) * 2015-05-11 2018-07-01 新日鐵住金股份有限公司 壓製成形裝置及壓製成形方法
JP6659380B2 (ja) * 2016-01-29 2020-03-04 株式会社神戸製鋼所 プレス成形品の製造方法及びプレス成形装置
CN105855342A (zh) * 2016-03-31 2016-08-17 胜狮货柜管理(上海)有限公司 一种生产集装箱侧板的压型设备、压型工艺及方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023001962A1 (de) 2023-05-15 2023-12-21 Mercedes-Benz Group AG Gegenprägen einer Sicke in einem Blech

Also Published As

Publication number Publication date
CN111801175B (zh) 2023-02-03
JPWO2019187863A1 (ja) 2020-05-28
KR102370794B1 (ko) 2022-03-04
WO2019187863A1 (ja) 2019-10-03
US20210023601A1 (en) 2021-01-28
CN111801175A (zh) 2020-10-20
KR20200112989A (ko) 2020-10-05
MX2020010016A (es) 2020-10-14
JP6738055B2 (ja) 2020-08-12
EP3778053A4 (de) 2021-05-19

Similar Documents

Publication Publication Date Title
CN112584944B (zh) 压制成型方法
JP6359171B2 (ja) プレス成形方法
CN109562427B (zh) 冲压成型品的制造方法
EP3760332A1 (de) Herstellungsverfahren für gepresste komponenten, pressformvorrichtung und metallplatte zum pressformen
KR102291185B1 (ko) 프레스 성형품의 제조 방법
JP6631759B1 (ja) プレス部品の製造方法、プレス成形装置及びプレス成形用の金属板
US20190111463A1 (en) Method for producing press-formed product and production line thereof
EP3778053A1 (de) Entwurfsverfahren für einen pressformgegenstand, pressformwerkzeug, pressformgegenstand und herstellungsverfahren für einen pressformgegenstand
CN113226584B (zh) 冲压成形方法
JP7205520B2 (ja) プレス部品の製造方法及びプレス成形用の金属板
US20230057735A1 (en) Manufacturing method of press formed product, press forming apparatus, and press forming line
JP7070287B2 (ja) プレス成形部品の製造方法、及びプレス成形部品
WO2020217594A1 (ja) プレス成形方法
EP3778057A1 (de) Steifigkeitsverbesserungsverfahren für pressformartikel, pressformmatrize, pressformartikel und herstellungsverfahren für pressformartikel
US20230182189A1 (en) Press forming tool and press forming method
EP4155005A1 (de) Pressformverfahren
US20230191469A1 (en) Press forming method
WO2022137630A1 (ja) プレス成形方法
JP7396415B1 (ja) プレス成形品の製造方法
US20230201903A1 (en) Press forming tool and press forming method
JP2024001837A (ja) プレス成形方法及びプレス成形品の製造方法
JP2024006554A (ja) プレス成形品の製造方法
JP2021159946A (ja) 板金成形品製造方法、板金成形品の製造装置及びフランジアップ用工具
CN115397577A (zh) 冲压成形方法以及冲压成形件

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20201008

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

A4 Supplementary search report drawn up and despatched

Effective date: 20210419

RIC1 Information provided on ipc code assigned before grant

Ipc: B21D 22/00 20060101AFI20210413BHEP

Ipc: B21D 22/26 20060101ALI20210413BHEP

Ipc: B21D 24/00 20060101ALI20210413BHEP

Ipc: B21D 17/02 20060101ALI20210413BHEP

Ipc: B21D 22/02 20060101ALI20210413BHEP

Ipc: B21D 22/04 20060101ALI20210413BHEP

Ipc: B21D 22/20 20060101ALI20210413BHEP

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20230203