WO2020090153A1 - プレス成形部品及びその製造方法 - Google Patents

プレス成形部品及びその製造方法 Download PDF

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Publication number
WO2020090153A1
WO2020090153A1 PCT/JP2019/025968 JP2019025968W WO2020090153A1 WO 2020090153 A1 WO2020090153 A1 WO 2020090153A1 JP 2019025968 W JP2019025968 W JP 2019025968W WO 2020090153 A1 WO2020090153 A1 WO 2020090153A1
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WO
WIPO (PCT)
Prior art keywords
vertical wall
top plate
wall portion
curved
press
Prior art date
Application number
PCT/JP2019/025968
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
三宅　弘人
新宮　豊久
雄司 山▲崎▼
Original Assignee
Ｊｆｅスチール株式会社
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 Ｊｆｅスチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to CN201980069487.XA priority Critical patent/CN112888514B/zh
Priority to US17/288,117 priority patent/US20210379639A1/en
Priority to KR1020217011666A priority patent/KR102449292B1/ko
Priority to EP19880411.4A priority patent/EP3858510A4/en
Priority to MX2021004861A priority patent/MX2021004861A/es
Priority to JP2020554758A priority patent/JP6881691B2/ja
Publication of WO2020090153A1 publication Critical patent/WO2020090153A1/ja

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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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • 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
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage 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 press-molded part having a L-shaped or T-shaped part in a plan view, which is used as a skeletal part of an automobile, for example, and a manufacturing method thereof.
  • the L-shaped or T-shaped component in a plan view has a curved portion that is displaced toward the vertical wall portion as the boundary portion between the top plate portion and the vertical wall portion moves in the longitudinal direction and is curved in a concave shape. ..
  • Front pillars, center pillars, and the like which are vehicle body frame parts of automobiles, are usually products having an L-shaped or T-shaped portion in a plan view.
  • draw forming drawing
  • bending bending
  • the draw forming is usually performed by using a die including a die, a punch, and a blank holder (wrinkle holder). In the drawing, for example, the metal plate is drawn by bringing the punch and the die closer together while the periphery of the metal plate is pressed by the die and the blank holder.
  • bending is usually performed by using a die consisting of a punch, a pad and a die.
  • the bending is performed by, for example, bending with a die while sandwiching a metal plate with a punch and a pad. Bending forming has a higher yield than drawing forming, because a blank holder is not used. Also, bend forming is generally more advantageous against cracking than draw forming. However, in bending, since the blank holder does not press the metal plate, wrinkles are more likely to occur than in drawing.
  • Patent Document 1 describes a press forming method of an automobile frame component having an L-shaped bent shape having a top plate portion, a vertical wall portion and a flange portion continuous with the top plate portion.
  • a metal plate having a shape such that the end of the portion corresponding to the lower side of the L shape of the metal plate is inside the top plate portion is arranged on the die mold, and the top plate portion is pressed by the pad. This suppresses out-of-plane deformation or buckling of the metal plate.
  • Patent Document 1 While sliding at least a part of a region corresponding to the top plate portion of the metal plate on a portion corresponding to the top plate portion of the die die, the vertical wall portion and the flange are formed. The part is press-formed with a bending die.
  • Patent Document 2 the angle formed by the standing wall curved portion with respect to the direction orthogonal to the flange portion, the length from the inner end edge of the flange surface of the shock mark center portion generated in the standing wall curved portion, and on the horizontal plane of the standing wall curved portion.
  • the body wrinkle countermeasure technology described in Patent Document 2 has a top plate surface and a vertical wall portion and a flange portion that are continuous with the top plate surface, and, in plan view, the top plate surface and the vertical wall portion. This is effective for a press-molded component having a curved portion that is convexly curved by displacing at least a part of the boundary between and toward the vertical wall portion side in the longitudinal direction.
  • the wrinkle generation pattern assumed in Patent Document 2 has a top plate surface and a vertical wall portion and a flange portion continuous to the top plate surface, which are often seen in automobile frame parts, and has a plan view.
  • an L-shaped or T-shaped press having a curved portion in which at least a part of the boundary between the top plate surface and the vertical wall portion is displaced toward the vertical wall portion toward the longitudinal direction and curved in a concave shape.
  • the generated bear is different from the wrinkle on the vertical wall that occurs in the molded part.
  • the accurate value of the length from the inner edge of the flange surface at the center of the shock mark which is a parameter when defining the shape of the part, can only be confirmed by measuring from the part that was actually press molded. .. For this reason, in Patent Document 2, it is not possible to predict the occurrence of wrinkles in the pre-stage of press molding in which the vertical wall portion is designed so as to have no wrinkles.
  • the present invention has been made by paying attention to the above points, and it is possible to suppress the occurrence of wrinkles on the vertical wall portion of the curved portion in the component shape having the L-shape, the T-shape, and the like when seen in a plan view. It is an object of the present invention to provide a simple press-formed part and a manufacturing method thereof.
  • one embodiment of the present invention has a top plate portion and a vertical wall portion and a flange portion that are continuous with the top plate portion, and, in plan view, the top plate portion and the vertical portion.
  • a press-molded component having a curved portion curved in a concave shape by being displaced toward the vertical wall portion as at least a part of the boundary portion with the wall portion extends in the longitudinal direction, wherein the curved portion has a cross-sectional shape of
  • the gist is that the inclination angle ⁇ [deg] of the vertical wall portion with respect to the top plate portion satisfies the following expression (1). (1- sin ⁇ ) / cos ⁇ > 0.95 ⁇ ⁇ ⁇ (1)
  • another aspect of the present invention has a top plate part and a vertical wall part and a flange part continuous to the top plate part, and, in plan view, a boundary between the top plate part and the vertical wall part.
  • a press-molded component having a curved portion that is concavely curved by displacing at least a part of the portion toward the vertical wall portion toward the longitudinal direction, and has a height of the vertical wall portion of H [mm in a sectional shape. ].
  • An inclination angle of the vertical wall portion with respect to the top plate portion is ⁇ [deg]
  • a radius of curvature of a boundary portion between the top plate portion and the vertical wall portion is Rp [mm]
  • the vertical wall portion and the flange portion is provided.
  • the curved portion has an inclination angle ⁇ of the vertical wall portion expressed by the following formula. (2) is satisfied, and further, the curved portion satisfies the following expression (3), or the following expression (4) and expression (5) The gist is to satisfy.
  • another aspect of the present invention has a top plate part and a vertical wall part and a flange part continuous to the top plate part, and, in plan view, a boundary between the top plate part and the vertical wall part.
  • a press-molded component having a curved portion that is concavely curved by displacing at least a part of the portion toward the vertical wall portion toward the longitudinal direction, and has a height of the vertical wall portion of H [mm in a sectional shape. ].
  • An inclination angle of the vertical wall portion with respect to the top plate portion is ⁇ [deg]
  • a radius of curvature of a boundary portion between the top plate portion and the vertical wall portion is Rp [mm]
  • the vertical wall portion and the flange portion is provided.
  • the press-formed part according to the aspect of the present invention may be manufactured by bending or drawing.
  • the present embodiment has a top plate portion 1 and a vertical wall portion 2 and a flange portion 3 which are continuous with the top plate portion 1, and when viewed in a plan view, the top plate portion 1 and the vertical portion
  • the target is a press-molded component 20 having a component shape having a curved portion 4 that is concavely curved by displacing at least a part of the boundary portion 5 of the wall portion 2 toward the vertical wall portion 2 in the longitudinal direction.
  • a press-molded component 20 is, for example, a component having an L shape or a T shape in a plan view.
  • the phrase "displaces toward the vertical wall portion 2 side and curves in a concave shape in the longitudinal direction" means that the boundary portion 5 between the top plate portion 1 and the vertical wall portion 2 extends along the longitudinal direction. It is curved so that the radius of curvature seen from the side becomes smaller.
  • the component shape of the press-molded component 20 having the curved portion 4 which is displaced toward the vertical wall portion 2 side and curved concavely as at least a part thereof in the longitudinal direction is also referred to as a curved inclusion component shape 10. Enter.
  • the press-formed part will be mainly described by taking an example of a curved inclusion part shape 10 having an L-shape in plan view as shown in FIG. That is, when viewed in a plan view, the press-molded component is curved so that one of the width directions of the top plate portion 1 projects toward the vertical wall portion 2 side toward the end portion in the longitudinal direction, and the curved portion 4 (in FIG. 1).
  • the part shape in which the left side portion) is formed is an example of the curved inclusion part shape 10.
  • a component shape curved in a T shape when seen in a plan view as shown in FIG. 2 can be cited. In the example of FIG.
  • both sides in the width direction of the top plate portion 1 are curved so as to project in the width direction, and the curved portions 4 are individually formed on both sides.
  • the present embodiment can be applied even to a component shape in which the vertical wall portion 2 exists only on one side in the width direction of the top plate portion 1.
  • a press capable of suppressing the generation of wrinkles on the vertical wall portion 2A of the curved portion 4.
  • the shape condition of the molded part 20 was earnestly studied.
  • the bending (bending) is usually performed by using a die including a die, a punch and a pad.
  • a metal plate is formed by the pad 31 and the punch 32.
  • the geometrical elements that determine the shape of the curved portion 4 include the height of the vertical wall portion 2, the angle formed by the top plate portion 1 and the vertical wall, and the boundary portion 5 between the top plate portion 1 and the vertical wall.
  • the present invention has been made based on such findings.
  • the shape of the curved portion 4 (the shape on the inner side of the curve) in the curved containing component shape 10 as shown in FIG. 3, in the sectional shape, the height of the vertical wall portion 2 is H [mm], and the top plate portion 1 is Is ⁇ [deg], the radius of curvature of the fillet of the boundary portion 5 between the top plate portion 1 and the vertical wall portion 2 is Rp [mm], and the boundary portion 6 between the vertical wall portion 2 and the flange portion 3 is ⁇ [deg].
  • the radius of curvature of the fillet is defined as Rd [mm].
  • the radius of curvature at the curved portion 4 of the boundary portion 5 between the top plate portion 1 and the vertical wall portion 2 in plan view is defined as r [mm].
  • These variables are shape parameters that define the shape of the curved portion 4 of the molded part 20.
  • the inclination angle ⁇ of the vertical wall portion 2 with respect to the top plate portion 1 is 0 degree in the direction orthogonal to the top plate portion, and from there, the vertical wall portion 2 with respect to the top plate portion 1. Is the increase in the angle in the direction of opening. That is, the inclination angle ⁇ is an angle obtained by subtracting 90 degrees from the obtuse angle formed by the top plate portion 1 and the vertical wall portion 2 on the back surface side.
  • the radius of curvature of the curved portion 4 may not be constant. In that case, for example, as the radius of curvature of the bending portion 4, an average value of the radius of curvature of the bending portion 4, a radius of curvature of the central portion in the longitudinal direction of the bending portion 4, a minimum value of the radius of curvature of the bending portion 4, and the like are adopted. do it.
  • the shape of the curved portion 4 of the press-formed component 20 of the present embodiment is classified into the following three types of shape conditions according to the value of “(1-sin ⁇ ) / cos ⁇ ”.
  • the shape condition of the first press-molded part of the present embodiment is on condition that the inclination angle ⁇ in the bending portion 4 satisfies the following expression (1). (1- sin ⁇ ) / cos ⁇ > 0.95 ⁇ ⁇ ⁇ (1)
  • the shape condition of the second press-formed component of the present embodiment is that the inclination angle ⁇ in the bending portion 4 satisfies the following expression (2) and further satisfies the following condition A or condition B: And 0.85 ⁇ (1- sin ⁇ ) / cos ⁇ ⁇ 0.9 ⁇ ⁇ ⁇ (2) "A condition”
  • the following expression (3) is satisfied.
  • B condition The following expressions (4) and (5) are satisfied. 1.5 ⁇ (r- H ⁇ tan ⁇ ) / (r- (H / cos ⁇ )) ⁇ 5.0 ⁇ ⁇ ⁇ (4) Rd> Rp (5)
  • the shape condition of the third press-formed component of the present embodiment is that the inclination angle ⁇ in the curved portion 4 satisfies the following expression (6) and further satisfies the following C condition or D condition. And (1- sin ⁇ ) / cos ⁇ ⁇ 0.85 ⁇ ⁇ ⁇ (6) "C condition”
  • C condition The following expression (7) is satisfied.
  • D condition The following expressions (8) and (9) are satisfied. 1.4 ⁇ (r- H ⁇ tan ⁇ ) / (r- (H / cos ⁇ )) ⁇ 2.0 ⁇ ⁇ ⁇ (8) Rd> Rp ⁇ ⁇ ⁇ (9)
  • the inclination angle of the vertical wall portion 2B adjacent to the curved portion 4 is also the same as or close to the inclination angle ⁇ of the vertical wall portion 2A.
  • the upper limit of SDR is 1.
  • the portion that becomes the flange portion 3 of the curved portion 4 needs to be elongated.
  • the following formula (11) is defined as the index value Eindx (Elongation index) of the elongation deformation that acts on the region of the metal plate 11 that becomes the flange portion 3 of the bending portion 4.
  • Eindx (r ⁇ H ⁇ tan ⁇ ) / (r ⁇ (H / cos ⁇ )) ....
  • the magnitude of the tensile deformation generated in the flange portion 3 in the curved portion 4 is determined by the radius of curvature Rp of the fillet formed by the boundary portion 5 between the top plate portion 1 and the vertical wall portion 2A, the vertical wall portion 2A and the flange portion 3.
  • the radius of curvature Rd of the fillet of the boundary part 6 of FIG. that is, as shown in FIG. 9A, when Rd> Rp, the resistance of the material passing through the fillet of the boundary 6 between the surface of the vertical wall 2 and the flange 3 is relatively smaller. Material easily flows in from the flange portion 3 side. Therefore, wrinkles are less likely to occur on the vertical wall portion 2.
  • FIG. 9A when Rd> Rp, the resistance of the material passing through the fillet of the boundary 6 between the surface of the vertical wall 2 and the flange 3 is relatively smaller. Material easily flows in from the flange portion 3 side. Therefore, wrinkles are less likely to occur on the vertical wall portion 2.
  • the threshold value for determining the shape of the press molded part 20 in each equation is such that bending molding is performed so that a plurality of types of curved inclusion part shapes 10 can be obtained, and the curved portion 4 was determined from the molding result of whether or not wrinkles were generated on the vertical wall portion 2.
  • the molding result is shown in FIG. FIG. 10 shows two parameters, SDR and Eindx, arranged as parameters for Rd> Rp and Rd ⁇ Rp, respectively.
  • “x” is plotted in the condition where wrinkles are generated
  • “ ⁇ ” is plotted in the condition where wrinkles are not generated.
  • Metal plate 11 considering the yield of the plate, it is preferable to use a shape obtained by expanding the shape of the molded part as the metal plate 11 as a material. However, if the yield is within the allowable range, the metal plate 11 having an area larger than the area required for the shape of the component may be used as the material for press molding. As the material metal plate 11, a steel plate having a tensile strength of 4400 MPa or more and 1800 MPa or less is suitable. When determining the threshold values of the above equations, a steel plate having a tensile strength of 980 MPa was appropriately used as the metal plate 11 as a material.
  • the shape of the curved portion 4 is, as described above, the height H [mm] of the vertical wall portion 2, the inclination angle ⁇ [deg] of the vertical wall portion 2 with respect to the top plate portion 1, the top plate portion 1 and the vertical wall portion 2.
  • Curvature radius Rp [mm] of the fillet of the boundary portion 5 the curvature radius Rd [mm] of the fillet of the boundary portion 6 of the vertical wall portion 2 and the flange portion 3, and the top plate portion 1 and the vertical wall portion 2 in plan view.
  • the radius of curvature r [mm] at the curved portion 4 of the boundary portion 5 is defined as a shape parameter.
  • the curved inclusion part shape 10 is added with other constraint conditions such as the constraint of the shape other than the curved portion 4.
  • the shape of the molded part 20 is specified, and the molded part is manufactured by press working. For example, depending on the value of SDR defined by the inclination angle ⁇ of the vertical wall portion 2 with respect to the top plate portion 1, one shape condition is selected from the shape conditions of the first press molded part to the third press molded part of the present embodiment. select. Then, the shape of the curved portion 4 is selected so as to satisfy the selected shape, and the shape of the press-formed component 20 is determined.
  • the press-forming to form the curved inclusion part shape 10 as described above is performed, for example, by bending using the mold shown in FIG.
  • the die shown in FIG. 11 is composed of an upper die including a die 30 and a pad 31 and a lower die including a punch 32. Then, the die 30 is lowered to bend and form the vertical wall portion 2 and the flange portion 3 with the portion of the metal plate 11 to be the top plate portion 1 sandwiched by the pad 31 and the punch 32.
  • the pad 31 is arranged to cover the entire top plate portion 1 so as to press the whole top plate portion 1, but the pad 31 may be configured to partially press the top plate portion 1. Good.
  • the press forming of the curved inclusion part shape 10 may be performed by drawing. That is, it may be formed by using a die including a die, a punch, and a blank holder (wrinkle holder).
  • the metal plate 11 may be manufactured by draw forming in which the periphery of the metal plate 11 is pressed by the die and the blank holder and the punch and the die are brought closer to each other to draw the metal plate 11.
  • the metal plate 11 to be press-molded may be a metal plate preformed in the previous step.
  • the component formed into the curved inclusion component shape 10 by the above-mentioned press molding may be an intermediate component before the final product shape.
  • a 980 MPa-class cold-rolled steel plate (plate thickness: 1.4 mm) was used as a material metal plate, and as the curved inclusion part shape 10, a part shape having a T-shape as shown in FIG. 12 was set.
  • curved portions 4 are provided on both sides in the width direction of the top plate portion 1 on the left side of the paper surface of FIG. The following conditions were adopted as the conditions for forming and analyzing the geometrical shape of the above parts.
  • the press-molding analysis was carried out under the condition that the molded part 20 was bent by a mold including the die 30, the pad 31, and the punch 32 as shown in FIG.
  • the pad pressure during the molding analysis was 40 tons, and the stroke of the pad 31 was 75 mm.
  • the coefficient of friction between the mold and the metal plate 11 was constant at 0.12.
  • the forming analysis result of the metal plate 11 at a time point 15 mm before the forming bottom dead center at the time of bending was visually observed to examine whether wrinkles were generated in the vertical wall portion 2 of the bending portion 4.
  • the SDR value is 0.966, and when the SDR is larger than 0.95, regardless of the Eindx value or the magnitude relationship between Rd and Rp, That is, all geometrical shapes are determined to be non-defective conditions.
  • wrinkles were not confirmed under all conditions, so if the design is made under the condition that the SDR value is greater than 0.95, a molded part in which the vertical wall portion 2A of the curved portion 4 does not have wrinkles. It was found that 20 could be manufactured. As described above, it was confirmed that wrinkles did not occur in the vertical wall portion 2A if the shape condition of the first press-formed part was satisfied.
  • the value of Eindx is 1.55, which is 1.4 or more, but when the value of Eindx is less than 2.0, the vertical wall portion 2 and the flange portion are When the radius of curvature of the fillet of the boundary portion 6 of 3 is 8 mm, the condition of Rd> Rp is not satisfied, so it is determined that the condition is not a good product, and in the other cases of 12 mm and 16 mm, the condition of Rd> Rp is satisfied. It is judged as a good product condition. Further, when the radius of curvature of the curved portion 4 is 100 mm, the value of Eindx is 2.26, and Eindx exceeds 2.0.
  • the top plate portion 1, the vertical wall portion 2 and the flange portion 3 which are continuous with the top plate portion 1, and the component curved in an L-shape when seen in a plan view is geometrically illustrated in FIG. If the shape is within the range of the conforming condition of the shape, that is, if the shape satisfies the present invention, wrinkles of the vertical wall portion 2 do not occur in the molded part 20, and if it deviates from that, wrinkles occur. I understand.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Body Structure For Vehicles (AREA)
  • Glass Compositions (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Battery Electrode And Active Subsutance (AREA)
PCT/JP2019/025968 2018-10-31 2019-06-28 プレス成形部品及びその製造方法 WO2020090153A1 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN201980069487.XA CN112888514B (zh) 2018-10-31 2019-06-28 冲压成形部件以其制造方法
US17/288,117 US20210379639A1 (en) 2018-10-31 2019-06-28 Press formed component and method for manufacturing same
KR1020217011666A KR102449292B1 (ko) 2018-10-31 2019-06-28 프레스 성형 부품 및 그 제조 방법
EP19880411.4A EP3858510A4 (en) 2018-10-31 2019-06-28 PRESS-FORMED ELEMENT AND METHOD OF MANUFACTURING SUCH ELEMENT
MX2021004861A MX2021004861A (es) 2018-10-31 2019-06-28 Componente formado en prensa y metodo para fabricar el mismo.
JP2020554758A JP6881691B2 (ja) 2018-10-31 2019-06-28 プレス成形部品及びその製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018205495 2018-10-31
JP2018-205495 2018-10-31

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WO2020090153A1 true WO2020090153A1 (ja) 2020-05-07

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US (1) US20210379639A1 (zh)
EP (1) EP3858510A4 (zh)
JP (1) JP6881691B2 (zh)
KR (1) KR102449292B1 (zh)
CN (1) CN112888514B (zh)
MX (1) MX2021004861A (zh)
WO (1) WO2020090153A1 (zh)

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JP5796560B2 (ja) 2010-05-19 2015-10-21 新日鐵住金株式会社 Ｌ字状形状を有する部品のプレス成形方法
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WO2016157976A1 (ja) * 2015-03-31 2016-10-06 Ｊｆｅスチール株式会社 プレス成形方法およびそのプレス成形方法を用いた部品の製造方法並びにそのプレス成形方法を用いて製造された部品
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JP2018205495A (ja) 2017-06-02 2018-12-27 キヤノン株式会社 電子機器、撮像装置及び移動体

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