Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Suzuki Motor Corporation

Misao Ogawa

Yasuharu Tanaka

Takashi Miyagi

Toshimitsu Aso

Shinobu Yamamoto

Hiroyuki Tanoue

Ryo Kuroda

Shigeru Uchiyama

Kazuyuki Kawano

Kei Misawa

Hiroshi Yoshida

Toshiya Suzuki

Takashi Yamamoto

Keiichi Murakami

Kazuhiko Honda

Minoru Sugawara

Kazunori Oooka

Junki Natori

Takatoshi Sasahara

Eizo Hayashida

Keita Ikegami

Masaru Itoh

Kuroda Ryo

This press-formed article includes: a top sheet portion; a sidewall continuing to the top sheet portion via a convex ridge line portion; a flange continuing to the sidewall via a concaved ridge line portion; and an outward flange continuing from an edge portion of the top sheet portion to an edge portion of the flange, via an edge portion of the convex ridge line portion, an edge portion of the sidewall, and an edge portion of the concaved ridge line portion, wherein in the same unit, an average thickness T, a minimum thickness T, and a maximum thickness Tof the outward flange satisfy Equation 1 and Equation 2.0.8×  (Equation 1)≤1.2×  (Equation 2)

Press-formed article, press-forming method, and press-forming apparatus

A press forming method includes a first step of pinching one part of a metal sheet by means of a die and a pad, and a second step of moving a punch in a direction in which the punch approaches the die relatively to perform press forming on the metal sheet. The die has a first support surface which has an edge including a curved portion. The pad has a second support surface facing the first support surface of the die. The first support surface includes a first flat portion, and a first deformation portion which protrudes or is recessed with respect to the first flat portion. The second support surface includes a second flat portion which faces the first flat portion, and a second deformation portion which is recessed or protrudes with respect to the second flat portion so as to correspond to the first deformation portion. The first deformation portion is provided on a normal line of the curved portion as viewed from a pressing direction. When a space between the first deformation portion and the second deformation portion is assumed to be a deformation space, in the second step, press forming is performed so that portions of the metal sheet which are on both sides of the deformation space flow into the deformation space, and the metal sheet deforms along the first deformation portion and the second deformation portion in the deformation space.

Press forming method and press apparatus

A method for manufacturing a press-formed article () includes a first step for forming a base sheet portion, a first rising portion, and a first strip portion from a sheet-shaped workpiece having a first edge portion and a second edge portion; and a second step for forming a second rising portion by causing a strip-shaped first zone including the second edge portion to be disposed between a first upper die and a first lower die from both sides, causing a second zone adjacent to the first zone to be disposed between a second upper die and a second lower die from both sides, and moving the first upper die and the first lower die relative to the second upper die and the second lower die, wherein, in the second step, a part of the second rising portion which is connected to a vertical ridge line () is shear-deformed.

Method for manufacturing press-formed article, press-formed article, and press-forming apparatus

This press-formed article includes: a top sheet portion; a sidewall continuing to the top sheet portion via a convex ridge line portion; a flange continuing to the sidewall via a concaved ridge line portion; and an outward flange continuing from an edge portion of the top sheet portion to an edge portion of the flange, via an edge portion of the convex ridge line portion, an edge portion of the sidewall, and an edge portion of the concaved ridge line portion, wherein in the same unit, an average thickness T, a minimum thickness T, and a maximum thickness Tof the outward flange satisfy Equation 1 and Equation 2.0.8&#x2003;&#x2003;(Equation 1)&#x2264;1.2&#x2003;&#x2003;(Equation 2)

A method of forming a metal sheet into a target shape by press-forming, such that the metal sheet is formed into an intermediate shape that is different from the target shape and then the target shape is formed from the intermediate shape, the method includes: when forming the intermediate shape from the metal sheet, forming the intermediate shape by forming a first region including at least a portion at which a ratio of sheet thickness reduction from the metal sheet is larger when the target shape is formed via the intermediate shape than when the target shape is formed directly from the metal sheet.

Metal sheet forming method, intermediate shape design method, metal sheet forming die, computer program, and recording medium

A method or apparatus to produce an L-shaped pressed component includes, where a portion of a blank, having tensile strength of 1180 MPa or more, is held in a state of being clamped by a blank holder and a die, and a portion of the blank, to be formed into a top plate is held in a state of being clamped by a pad and a punch; the second step where a vertical wall, a concave ridge and a flange on the inner side of a curved portion are formed by, bend forming with a bending die, forming one, two or more material inflow promoting portion; and the third step where the die is moved in a direction toward a side where the blank holder is disposed to form a vertical wall, a concave ridge, and a flange on the outer side of the curved portion by draw forming.

Method and apparatus for producing pressed component

This press-formed article includes: a top sheet portion; a sidewall continuing to the top sheet portion via a convex ridge line portion; a flange continuing to the sidewall via a concaved ridge line portion; and an outward flange continuing from an edge portion of the top sheet portion to an edge portion of the flange, via an edge portion of the convex ridge line portion, an edge portion of the sidewall, and an edge portion of the concaved ridge line portion, wherein in the same unit, an average thickness T, a minimum thickness T, and a maximum thickness Tof the outward flange satisfy Equation 1 and Equation 2.0.8&#xd7;&#x2003;&#x2003;(Equation 1)&#x2264;1.2&#xd7;&#x2003;&#x2003;(Equation 2).

The manufacturing method includes a first step in which a pad holding state is established and a second step in which pad draw forming is performed after the first step is completed. In the pad holding state, (a) a part of a blankto be formed into a top plateis held between a padand a punch, and a part of the blankto be formed into a flangeis held between a dieand a blank holder, (b) in a specific press directional cross section of a part of the blankto be formed into a first part, the position of the contacting surface of the blank holderthat makes contact with the blankin the direction of pressing is located toward the punchin the direction of arrangement of the padand the punch, compared with the position of the contacting surface of the padthat makes contact with the blankin the direction of pressing, (c) a vertically-reversing cross-sectional angle is more than 0&#xb0; and equal to or less than 80&#xb0;, and (d) in a press directional cross section that is different from the specific press directional cross section, the position of the contacting surface of the padthat makes contact with the blankin the direction of the pressing is located toward the padin the direction of the arrangement, compared with the position of the contacting surface of the blank holderthat makes contact with the blankin the direction of pressing.

Manufacturing method and manufacturing apparatus for press-formed article

A blank that is a material for an elongated press formed article having a substantially hat shaped lateral cross-section profile including a top plate section, a ridge line section, a flange section, and vertical wall section, and configured with a first portion in which the top plate section has a fixed width, and a second portion including a curved portion in which the top plate section exhibits an L-shape in plan view due to the vertical wall section, the ridge line section, and the flange section curving along with the width of the top plate section gradually increasing. The blank has a shape of an opened-out shape of the press formed article, additionally with a first recess, a protrusion, and a second recess provided to an edge of an excess portion additionally provided at an edge of a location that will form the flange section configuring the curved portion.

Blank, forming plate, press formed article manufacturing method, and press formed article

A blank for forming a pressed article, the blank including a flat pattern edge configuring an edge on one length direction side of the blank, and an excess portion formed at the flat pattern edge. An edge of the excess portion includes a first convex portion that protrudes toward the one length direction side of the blank with respect to the flat pattern edge, a first concave portion that is adjacent to the first convex portion at a width direction outer side of the blank, that is formed in a concave shape, and that connects the flat pattern edge and the first convex portion together, and a second concave portion that is adjacent to the first convex portion at a width direction inner side of the blank, that is formed in a concave shape, and that connects the flat pattern edge and the first convex portion together.

Blank, and pressed article manufacturing method

A pressed article manufacturing method employing a press mold equipped with a punch and a die to manufacture a pressed article including a first wall, a second wall extending out from an end portion on at least one length direction side of the first wall toward a back face side of the first wall, and a third wall extending out from a leading end portion of the second wall toward a front face side of the second wall. The manufacturing method includes using the punch and the die to apply pressure to and grip a portion on a base end side of the second wall in a first warp shape in which the base end side portion is warped so as to be convex on a back face side of the second wall as viewed in lateral cross-section in a state prior to demolding from the press mold.

Pressed article manufacturing method and press mold

This press-forming apparatus is a press-forming apparatus for manufacturing a press-formed article from a workpiece sheet by moving at least one of a die and a punch so as to be close to each other in a press-forming direction, the press-formed article having a top portion, a first sidewall portion, and a second sidewall portion, the first sidewall portion and the second sidewall portion being connected to ridge portions formed on both edges of the top portion, wherein the die includes: a die slide; a first divisional die; a second divisional die; a second divisional die driving unit; a die pad; a die pad driving unit; an insert block; and an insert block driving unit.

Press-forming apparatus and press-forming method

A method for manufacturing a hat-shaped cross-section component includes a gripping process, a bending and stretching process, and a bend back process. In the gripping process, a pair of vertical walls of an elongated preliminarily formed component are disposed outside of a punch, and a top plate is gripped using the punch and a pad. In the bending and stretching process, die moves toward the punch side relative to the preliminarily formed component, and the die bends and stretches the vertical walls toward the opposite side to the top plate at one side in the length direction of the preliminarily formed component. In the bend back process, a holder moves toward the pad side relative to the preliminarily formed component, and the holder bends back the vertical walls toward the top plate side at another side in the length direction of the preliminarily formed component.

Hat-shaped cross-section component manufacturing method

A hat-shaped cross-section component manufacturing apparatus includes: a die that includes a forming face that grips and presses a metal stock sheet; a blank holder, that includes a forming face that grips and presses the metal stock sheet so as to configure a forming face corresponding to the forming face of the die, a pad that is disposed inside the opening formed in the die, and that includes a forming face that grips and presses the metal stock sheet; and a punch that is disposed facing the pad and that includes a forming face that grips and presses the metal stock sheet so as to configure a forming face corresponding to the forming face of the pad. The hat-shaped cross-section component manufacturing apparatus further includes a pressure limiting device that limits a formed curving component from being pressed between the pad and the blank holder during demolding.

Hat-shaped cross-section component manufacturing apparatus

A curved parthaving a hat-shaped cross section is produced by press-forming without causing cracks and wrinkles. When producing a curved partwhich is made up of a top plate, vertical wallsandextended in parallel with each other along ridgelinesandof the top plate, and outwardly directed flangesandwhich connect to leading edges of the vertical walls, and has a generally hat-shaped cross section, by press forming, the metal material sheetis interposed and constrained by the dieand the blank holderand is press-formed while the metal material sheetbeing interposed and constrained by the padand the punch

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Tokyo, Japan

Misao Ogawa