Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Kissei Pharmaceutical Co., Ltd.

Suzuki Motor Corporation

Takashi Miyagi

Yasuharu Tanaka

Misao Ogawa

Toshimitsu Aso

Shinobu Yamamoto

Hiroshi Yoshida

Kohsuke Ohno

Masahiro Kubo

Kazuo Shimizu

Ryo Kuroda

Hiroyuki Tanoue

Yasunori Ueno

Shigeru Uchiyama

Kazunori Oooka

Hikaru Suzuki

Yoshiaki Nakazawa

Toshiya Suzuki

Takashi Yamamoto

Nobuhiko Fushimi

Kazuyuki Kawano

Junichiro Suzuki

Daisuke Yasufuku

Kei Misawa

Masahiro Saito

Keiichi Murakami

Kenichiro Otsuka

Jun Nitta

Tohru Yoshida

Masahiro Kobayashi

Masayuki Isaji

Ryuichi Nishimura

Toshihiro Nishimura

Kazuhiko Honda

Norihiko Kikuchi

Satoshi Shirakami

Masahiro Hiratochi

Kazuya Tatani

Shigeru Yonekubo

Tomonaga Ozawa

Yoshinori Nonaka

Yu Kuramochi

Minoru Sugawara

Takatoshi Sasahara

Junki Natori

Yusuke Onda

Eizo Hayashida

Mikie Kambara

Keita Ikegami

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 for manufacturing a pressed component including an elongated top plate, a wall having one end connected to a short direction end portion of the top plate, that curves with a convex shape bowing toward an opposite side to the top plate as viewed from an upper side of the top plate, and that includes a sharp curve portion, and a flange that is connected to another end of the wall, and that extends in a plate thickness direction of the wall toward the opposite side to the top plate side. The manufacturing method includes pressing to form an intermediate formed component including a preliminary flange and pressing to deform the preliminary flange to form the preliminary flange into the flange.

Pressed component manufacturing method and press apparatus

A press tooling includes a distance member pivotably supported by a holder; and a moving device provided on a first die unit. The holder is provided in a movable manner with respect to a punch in a press direction, and a pad is provided in a movable manner with respect to a die in the press direction. The distance member is pivotable between a home position in which the distance member does not come into contact with the second die and a preventive position in which the distance between the pad and the holder in the press direction is prevented from being equal to or less than a predetermined distance. As the holder moves relative to the punch in the first direction, the moving device causes the distance member to pivot from the home position toward the preventive position.

Press tooling

A hold device is attached to press tooling. The hold device includes a distance member attached to a holder, and a moving device attached to a first die unit. The holder is provided in a movable manner with respect to a punch in a press direction, and a pad is provided in a movable manner with respect to a die in the press direction. The distance member is pivotable between a home position in which the distance member does not come into contact with the second die and a preventive position in which the distance between the pad and the holder in the press direction is prevented from being equal to or less than a predetermined distance. As the holder moves relative to the punch in the first direction, the moving device causes the distance member to pivot from the home position toward the preventive position.

Hold device

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 method and apparatus for manufacturing a press component without generating cracks in a flange on an inner circumferential side of a curved portion includes press working by a free bending method on a blank consisting of an ultra-high tensile strength steel sheet. A press component is manufactured by performing cold press working on a blank of an ultra-high tensile strength steel sheet. By the press working, a material inflow facilitating portion that increases the amount by which a portion of the blank to be formed into an end portion of the press component flows into a portion of the blank to be formed into a flange on an inner circumferential side of the curved portion of the press component is provided in the vicinity of the portion of the blank to be formed into the flange on an inner circumferential side of the curved portion of the press component.

Method and apparatus for manufacturing press component

A process of pressing a blank to form an intermediate formed component configured including a top plate, the ridge lines at short direction ends of the top plate, and vertical walls facing each other in a state extending from the respective ridge lines and at least one of the vertical walls configuring a curved wall curving as viewed from an upper side of the top plate, such that a step projecting toward an opposite side to a side on which the vertical walls face each other is formed to the curved wall so as to run along a length direction of the top plate. The method includes pressing the intermediate formed component to narrow a projection width of the step, or to move a portion of the curved wall where the vertical walls face each other.

Pressed component manufacturing method, pressed component, and pressing apparatus

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 drawn body for a vehicle structural member has a tensile strength of 980 MPa or more, radii of curvature of two first convex ridge portions, a second convex ridge portion, and a concave ridge portion are each 30 mm or less, a corner radius of a corner wall is 30 mm or less, and a forming depth which is a separation distance between a top sheet portion and an outwardly-extending flange is 40 mm or more.

Drawn body for vehicle structural member, manufacturing method for drawn body for vehicle structural member, and manufacturing apparatus for drawn body for vehicle structural member

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Tokyo, Japan

Takashi Miyagi