Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Toyota Jidosha Kabushiki Kaisha

Aisin Takaoka Co., Ltd.

Toshimitsu Aso

Takashi Miyagi

Yasuharu Tanaka

Misao Ogawa

Shinobu Yamamoto

Kunio Hayashi

Toshimasa Tomokiyo

Hiroshi Yoshida

Hiroyuki Tanoue

Ryo Kuroda

Kazunori Oooka

Hiroyuki Okada

Hitoshi Tanino

Kazuyuki Kawano

Junichiro Suzuki

Daisuke Yasufuku

Ryozo Wada

Kei Misawa

Takashi Yamamoto

Keiichi Murakami

Riki Okamoto

Manabu Takahashi

Tatsuo Yokoi

Kazuhiko Honda

Eizo Hayashida

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

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 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 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

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

Method for producing curved part, and skeleton structure member of body shell of automobile

The present invention provides a steel sheet with chemical components including, by mass %, 0.18-0.35% of C, 1.0%-3.0% of Mn, 0.01%-1.0% of Si, 0.001%-0.02% of P, 0.0005%-0.01% of S, 0.001%-0.01% of N, 0.01%-1.0% of Al, 0.005%-0.2% of Ti, 0.0002%-0.005% of B, and 0.002%-2.0% of Cr, and the balance of Fe and inevitable impurities, wherein: by volume %, a fraction of the ferrite is 50% or more, and a fraction of a non-recrystallized ferrite is 30% or less; and Cr/Cris 2 or less, where Cris a concentration of Cr subjected to solid solution in iron carbide and Cris a concentration of Cr subjected to solid solution in a base material, or Mn/Mnis 10 or less, where Mnis a concentration of Mn subjected to solid solution in an iron carbide, and Mnis a concentration of Mn subjected to solid solution in a base material.

Steel sheet and method for manufacturing steel sheet

A method produces a press-molded article having a hat shaped cross-section with flanges at both sides, a top plate, vertical walls at both sides, and having a shape curved in the vertical direction to an inverted checkmark shape along the longitudinal direction when the molded article is viewed from a side face with the top plate section on the top side. An intermediate molded body is formed by drawing a metal stock sheet into an intermediate shape, and after preparing the outside shape of the intermediate molded body by trimming, drawing is subsequently performed to form the final shape.

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Tokyo, Japan

Toshimitsu Aso