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公开(公告)号：US11135634B2
公开(公告)日：2021-10-05
申请号：US16497643
申请日：2018-03-19
发明人： Hiroto Miyake , Toyohisa Shinmiya
摘要： To reduce warping of vertical wall portions without causing buckling occurring in a component shape not having a flange portion. A punch and a pad sandwiching a top sheet portion therebetween in the sheet thickness direction, bending blades for bend-forming the vertical wall portions, and stoppers facing the bending blades in the press direction and constraining end portions of a material to be machined are provided. The punch is supported by a first cushion component elastically expandable and contractible in the press direction. The bending blades each have an upper die component and a lower die component disposed facing each other in the press direction with an interval (D) equal to or larger than a set compression amount and a second cushion component interposed between the upper die component and the lower die component, maintaining the interval (D), and contractible in the press direction at a predetermined pressure or more. The cushion pressure of the second cushion component is lower than the cushion pressure of the first cushion component and has such cushion pressure that the second cushion component does not contract during the bend-forming of the vertical wall portions.
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公开(公告)号：US20200023418A1
公开(公告)日：2020-01-23
申请号：US16497640
申请日：2018-03-19
摘要： To reduce warping of vertical wall portions without causing buckling during pressing. Press-forming into a hat cross-sectional shape having one linear vertical wall portion and the other curved vertical wall portion and not having a flange portion is performed. A punch and a pad sandwiching a top sheet portion therebetween, bending blades, and stoppers are provided. The punch is supported by a first cushion component. The bending blades each have an upper die component and a lower die component disposed facing each other in the press direction with an interval (D) equal to a set compression amount in the range of 2% or more and 6% or less of the heights of the vertical wall portions and a second cushion component interposed between the upper die component and the lower die component, maintaining the interval (D), and contractible in the press direction. The cushion pressure of the second cushion component is lower than the cushion pressure of the first cushion component and has such cushion pressure that the second cushion component does not contract during the bend-forming of the vertical wall portions. The clearance between the side surface of the punch and the bending blades is 90% or more of the sheet thickness of a material to be processed and less than the sheet thickness.
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公开(公告)号：US10413956B2
公开(公告)日：2019-09-17
申请号：US15115470
申请日：2015-01-23
发明人： Toyohisa Shinmiya , Yuji Yamasaki , Eiji Iizuka
摘要： There is provided a press forming method capable of suppressing a camber back, which occurs in a hat-shaped member while reducing a restriction on a shape of the hat-shaped member. At a time of the press forming, a blank material (4) in which a longitudinal line length is at least longer than a longitudinal line length of a top plate portion of a hat-shaped member (5) is fixed between a pair of press dies (lower die (2), upper die (3)), which have bent surfaces (convex surface (2a), concave surface (3a)), while being warped upward, that is, in a bending direction of the lower die (2) and the upper die (3). Subsequently, for the fixed blank material (4), a bent portion of the hat-shaped member (5) is press formed by using the convex surface (2a) and the concave surface (3a).
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公开(公告)号：US09981298B2
公开(公告)日：2018-05-29
申请号：US14913786
申请日：2014-08-22
CPC分类号： B21D5/02 , B21C23/12 , B21C35/023 , B21C35/026 , B21D5/10 , B21D11/08 , B21D22/02 , B21D47/01 , B21D47/04
摘要： A method of producing a polygonal closed cross-section structural component includes press-forming a metal sheet into a gutter-shaped pre-processed part with a curved form along its longitudinal direction having plural ridge lines corresponding to corner portions of the polygonal closed cross-section in a cross-sectional form developed by cutting the component at a position corresponding to the ridge line located at the innermost side in the radial direction to provide a flange portion extending along the ridge line at the resulting respective ends, and press-forming the pre-processed part to deform inwardly in the cross-sectional direction at a position of one or more of the plural ridge lines to butt the ridge lines located at the innermost side and the flange portions to each other.
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公开(公告)号：US20180078993A1
公开(公告)日：2018-03-22
申请号：US15825953
申请日：2017-11-29
发明人： Kazuhiko Higai , Toyohisa Shinmiya , Yuji Yamasaki
CPC分类号： B21D53/88 , B21D5/015 , B21D5/02 , B21D9/08 , B21D11/08 , B21D26/033 , B21D39/02 , B21D47/01
摘要： A method of forming a closed cross-sectional structure press-forming the plate-shaped workpiece into portions corresponding to bottom portion and left and right side wall portions; and providing bend-facilitating lines at the plurality of bend lines; bending the workpiece in a direction that the portions corresponding to the left and right side wall portions approach each other by pressing a punch into a space between a pair of dies while clamping the portion corresponding to the bottom portion between the punch and a pad in a plate thickness direction; and bending the corresponding portions along the bend-facilitating lines by pressing the corresponding portions against an outer periphery of a plug having an outer peripheral shape the same as a final shape of the closed cross-sectional structure while the plug is placed on the portion of the workpiece corresponding to the bottom portion.
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6.发明授权公开(公告)号：US09327327B2
公开(公告)日：2016-05-03
申请号：US14403674
申请日：2013-05-24
CPC分类号： B21C37/16 , B21C37/0815 , B21C37/185 , B21D5/015 , B21D37/16
摘要： A method of manufacturing a pipe with different diameters along a longitudinal direction that has a small diameter portion, a large diameter portion, and a diameter-changing portion provided between the small diameter portion and the large diameter portion and is formed by press forming a blank made of a metal sheet includes press forming the blank with a U-shape forming die into a U-shaped formed part and press forming the U-shaped formed part with an O-shape forming die set into a circular cross-section formed part. A length of a vertical wall of the U-shape forming die is longer than a length of a vertical wall portion of the U-shaped formed part. In the O-shape forming die set, a die mating line is inclined downwardly, and a ratio t/D of a sheet thickness t of the blank to a diameter D, which represents a diameter of a portion of the O-shape forming die set corresponding to the small diameter portion and a diameter of a portion of the O-shape forming die set corresponding to the large diameter portion, is 0.010≦t/D≦0.080.
摘要翻译： 一种制造具有小直径部分，大直径部分和设置在小直径部分和大直径部分之间的直径变化部分的沿着纵向具有不同直径的管的方法，通过压制成型坯 由金属片制成，包括用U型成形模将冲压成形为U形成形部，并将O形成形模压制成U形成形部，并将其成型为圆形横截面形成部。 U形成形模的垂直壁的长度比U形成形部的垂直壁部的长度长。 在O形成型模组中，模具配合线向下倾斜，坯料的片材厚度t与直径D的比值t / D，其代表O形成模具的一部分的直径 对应于小直径部分和对应于大直径部分的O形成模具的一部分的直径设定为0.010＆lt; t / D＆nlE; 0.080。
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公开(公告)号：US11052444B2
公开(公告)日：2021-07-06
申请号：US16634997
申请日：2018-07-25
摘要： A method for manufacturing a press formed product is disclosed. The method for manufacturing a press formed product includes: when a metal sheet is press formed to manufacture a product having a product shape of a hat-shaped cross-section, in which a top plate part and a flange part are continuous in a width direction through a side wall part and the top plate part and the flange part curve convexly or concavely toward the top plate part along a longitudinal direction, a first step of manufacturing an intermediate component by press forming into a component shape having a hat-shaped cross-section, in which a curve of each of the top plate part and the flange part along the longitudinal direction has a second curvature radius smaller than a curvature radius in the product shape; and a second step of press forming the intermediate component into the product shape.
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公开(公告)号：US20200376532A1
公开(公告)日：2020-12-03
申请号：US16636786
申请日：2018-07-25
摘要： A method for manufacturing a press formed product is disclosed. The manufacturing method includes a first step of manufacturing an intermediate component by forming the curved part such that a line length along the longitudinal direction of a curved convex side WA is shorter than a line length in the product shape and a line length along the longitudinal direction of a curved concave side WB is longer than a line length in the product shape; and a second step of forming the intermediate component such that a line length of the curved convex side WA is longer than the line length in the first step and a line length of the curved concave side WB is shorter than the line length in the first step.
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公开(公告)号：US20200346269A1
公开(公告)日：2020-11-05
申请号：US16957122
申请日：2018-12-17
摘要： A press formed product is disclosed. A method for manufacturing the press formed product is a method for manufacturing the press formed product including applying press processing including stretch flange forming to a single metal sheet of one sheet material after performing shearing processing of the metal sheet to manufacture the press formed product. When a region where a stretch flange crack is estimated to be likely to occur when the single metal sheet is press formed by the press processing is set as a stretch flange crack region, the press processing is applied after heating and cooling the end surface of the metal sheet positioned in the stretch flange crack region and at least the end surface in the end surface and the vicinity thereof in the single metal sheet after the shearing processing.
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公开(公告)号：US10603707B2
公开(公告)日：2020-03-31
申请号：US15561581
申请日：2016-01-29
发明人： Yusuke Fujii , Yuji Yamasaki , Toyohisa Shinmiya
摘要： A press-forming method for a component having a hat-shaped or U-shaped cross section and comprising a curved portion curved in a widthwise direction along with a longitudinal direction and straight side portions connecting to both ends of the curved portion from a sheet-shaped blank, wherein the blank is drawn to a hat-shaped or U-shaped cross section through a hat-shaped cross-sectional form having a top portion, vertical wall portions connecting at their upper end parts to both end parts of the top portion through fillet portions, and flange portions connecting at their internal end parts to the lower end parts of the vertical wall portions through fillet portions, and a material movement in the flange portion of the curved portion is caused in the drawing to mitigate tensile deformation or compression deformation in the circumferential direction generated in the flange portion of the curved portion.
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