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1.发明申请公开(公告)号：US20180107772A1
公开(公告)日：2018-04-19
申请号：US15322409
申请日：2015-07-02
发明人： Satoshi SHIRAKAMI , Hiroshi YOSHIDA , Takashi MIYAGI , Jun NITTA , Tohru YOSHIDA
CPC分类号： G06F17/5018 , B21D22/00 , B21D22/201 , G06F2217/16 , G06F2217/42
摘要： A stretch flange crack prediction method of predicting initiation of stretch flange cracks that occurs in a flange end section during stretch flange forming of a deformable sheet, includes: a measurement value acquisition process of acquiring, for each of a plurality of sheet-shaped test pieces, a fracture strain measurement value, a normal strain gradient measurement value, and a circumferential strain gradient measurement value; a CAE analysis process of acquiring a maximum major strain maximum element having a highest maximum major strain, a normal strain gradient of the maximum major strain maximum element, and a circumferential strain gradient of the maximum major strain maximum element; a fracture determination threshold acquisition process of acquiring a fracture determination threshold by converting the fracture strain measurement value; and a prediction process of predicting that stretch flange cracks will be initiated, when the maximum major strain is equal to or higher than the fracture determination threshold.
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2.发明申请公开(公告)号：US20170227356A1
公开(公告)日：2017-08-10
申请号：US15502030
申请日：2015-08-06
发明人： Masahiro SAITO , Tohru YOSHIDA
摘要： Provided is a line displacement evaluation method of evaluating line displacement occurring in a press-formed article in press forming of forming a character line. This method includes acquiring a cross section profile of the press-formed article measured so as to traverse the character line formed in the press-formed article; calculating a 4th order differential coefficient of the acquired cross section profile; and evaluating the line displacement, on the basis of the calculated 4th order differential coefficient of the cross section profile.
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公开(公告)号：US20180333760A1
公开(公告)日：2018-11-22
申请号：US15552552
申请日：2016-02-25
摘要： Provided is a steel material shearing method that enables highly productive and low-cost production of a steel material with a sheared surface having excellent hydrogen embrittlement resistance, fatigue strength, and stretch flangeability. The shearing method comprises making a clearance between a die and a punch 5 to 80% of a sheet thickness of a workpiece, shearing the workpiece using the punch, and, by utilizing a punched material punched out by the punch, pressing an end face of the punched out material against the sheared surface of the worked material on the die to produce a steel sheet with a sheared edge having excellent hydrogen embrittlement resistance and fatigue strength.
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公开(公告)号：US20180272408A1
公开(公告)日：2018-09-27
申请号：US15762824
申请日：2016-09-28
发明人： Takashi YASUTOMI , Takashi MATSUNO , Tohru YOSHIDA
CPC分类号： B21D28/34 , B21D22/02 , B21D24/16 , B21D28/16 , B21D35/006 , B23D15/08 , B23D35/001 , B23K31/00
摘要： A cutting method using a stamping press according to the present disclosure is a method to cut a workpiece that is configured from a first metal sheet and a second metal sheet joined at a weld portion and that has a heat-affected zone around the weld portion, in which the workpiece is cut using a punch. The punch includes a flat portion and a projecting portion projected more toward the workpiece than a flat portion of the punch. The workpiece is positioned with respect to the punch at a position such that the projecting portion starts cutting at least at one out of the heat-affected zone or the weld portion before the flat portion cuts the workpiece. The workpiece is then cut by moving the punch and a die relative to each other in this state of positioning so as to shear across the weld portion on the workpiece.
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5.发明申请METHOD FOR MANUFACTURING PRESS-FORMED PRODUCT, DEVICE FOR MANUFACTURING PRESS-FORMED PRODUCT, MANDREL, AND PRESS-FORMED PRODUCT 审中-公开用于制造压制产品的方法，用于制造压制产品，人造革和压制产品的装置公开(公告)号：US20160325330A1
公开(公告)日：2016-11-10
申请号：US15107715
申请日：2015-03-03
发明人： Jun NITTA , Tohru YOSHIDA , Hiroshi YOSHIDA , Nobuo YOSHIKAWA , Shigeru YONEMURA
摘要： A method for manufacturing a press-formed product includes: a first step of preparing a long material having a bending portion; and a second step of decreasing curvature of the bending portion while restricting both ends of the long material in a longitudinal direction.
摘要翻译： 压制成形品的制造方法包括：制备具有弯曲部的长材的第一工序; 以及在长边材料的长度方向限制两端的同时减小弯曲部的曲率的第二工序。
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公开(公告)号：US20160263637A1
公开(公告)日：2016-09-15
申请号：US15034902
申请日：2014-12-05
发明人： Nobuo YOSHIKAWA , Hiroshi YOSHIDA , Jun NITTA , Tohru YOSHIDA
IPC分类号： B21D22/02
CPC分类号： B21D22/02 , B21D22/26 , B21J5/025 , B21J13/025
摘要： [Object] To provide a press-molding apparatus capable of appropriately thickening a vertical wall portion while preventing the occurrence of buckling.[Solution] Provided is a press-molding apparatus configured to mold a press-molded product by performing press working on a work, the press-molding apparatus including: a support member that supports the work with a first thickness having a hat-shaped cross-section or a U-shaped cross-section; a punch member that moves relative to the support member to execute press working so as to reduce a height of a vertical wall portion of the work and thicken the vertical wall portion to a second thickness; and a pad member that faces the support member with the vertical wall portion to be thickened placed therebetween, the pad member being biased by a biasing member and having its distance to the support member kept equal to or smaller than the second thickness during the press working.
摘要翻译： [解决方案]提供一种压制成型装置，其通过在工件上进行加压加工而成形为成型品，该压制成型装置包括：支撑部件，其以具有帽状十字形的第一厚度 截面或U形横截面; 冲压构件，其相对于所述支撑构件移动以执行冲压加工，以便减小所述工件的垂直壁部的高度并将所述垂直壁部分增厚到第二厚度; 以及衬垫构件，其面对所述支撑构件，所述垂直壁部分被加厚，所述衬垫构件被施力构件偏压，并且在所述压力加工期间其与所述支撑构件的距离保持等于或小于所述第二厚度 。
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公开(公告)号：US20150298197A1
公开(公告)日：2015-10-22
申请号：US14418049
申请日：2012-12-19
发明人： Tohru YOSHIDA
摘要： A press-forming tool comprising: a punch including a punch portion and a plate portion transferring shape to a blank material; a die paired with the punch and opposes the punch portion; a wrinkle suppression mold including a first surface opposing the plate portion and comes into contact with the plate portion at a press-forming ending point, a second surface opposing the die and holds the blank material along with the die, and a third surface continued between the first and second surface and opposes the punch portion, and disposed between the third surface and the punch portion via a gap; a pressure receiving portion including a groove portion on the first surface of the wrinkle suppression mold; and a wrinkle suppression force increasing portion disposed on a surface opposing the first surface of the plate portion, protrudes toward the pressure receiving portion, and generates a reaction force opposed to a pressing direction when pressed in the pressing direction in end-phase of a press-forming.
摘要翻译： 一种压制成型工具，包括：冲头，其包括冲压部分和将形状转移到坯料材料的板部分; 与冲头配对并与冲头部分相对的模具; 皱纹抑制模具，其包括与所述板部相对的第一表面，并在压制成形点处与所述板部接触;与所述模具相对的第二表面，并与所述模具一起保持所述坯材;以及第三表面， 所述第一表面和所述第二表面相对于所述冲头部分，并且经由间隙设置在所述第三表面和所述冲头部分之间; 压力接收部分，其包括在所述皱纹抑制模具的第一表面上的凹槽部分; 并且设置在与板部的第一表面相对的表面上的皱纹抑制力增大部分朝向压力接收部分突出，并且在按压的结束阶段中沿按压方向按压时产生与按压方向相反的反作用力 -成型。
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公开(公告)号：US20190143775A1
公开(公告)日：2019-05-16
申请号：US16244878
申请日：2019-01-10
CPC分类号： B60G7/001 , B21D22/025 , B21D41/026 , B21D53/84 , B60G2206/012 , B60G2206/11 , B60G2206/72 , B60G2206/8103 , B60G2206/8104 , B60G2206/811 , Y10T29/49622
摘要： A coupling structure includes a hollow rod section formed of a metal pipe and fastening sections formed by plastic deformation of the metal pipe so as to be connected with end sections of the hollow rod section. The fastening section includes a pair of base end sections which are each connected with a peripheral wall section forming a closed cross-section at the end section of the hollow rod section, and are separated from each other, and a bottom wall including a flat surface connected with the pair of the base end sections, and a pair of front end sections including a pair of side walls curving inwards from at least widthwise end sections of the bottom wall on a base end section side.
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9.发明申请公开(公告)号：US20180075177A1
公开(公告)日：2018-03-15
申请号：US15689209
申请日：2017-08-29
发明人： Tohru YOSHIDA , Shunji HIWATASHI , Seiichi DAIMARU , Yasuharu TANAKA , Takashi ARIGA , Toshiyuki NIWA , Yukihisa KURIYAMA , Satoru OKAYAMA
IPC分类号： G06F17/50
CPC分类号： G06F17/5018 , G06F2217/16 , Y02T10/82
摘要： An apparatus for identification of a cause of occurrence of springback having a press forming analyzer for numerically analyzing forming conditions of press forming to obtain forming data of a press formed part, a springback analyzer for numerically analyzing said forming data to calculate a springback value, and a processor for processing at least one of a physical property value and physical property quantity data of part of the regions of said press formed part among forming data of said press formed part and making said springback analyzer calculate the springback value based on the results of said processing.
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10.发明申请公开(公告)号：US20170191915A1
公开(公告)日：2017-07-06
申请号：US15308680
申请日：2015-05-08
CPC分类号： G01N3/02 , B21D19/08 , G01N3/00 , G01N3/24 , G01N2203/0025 , G01N2203/0216 , G01N2203/0282 , G06F17/5009 , G06F2217/16
摘要： An evaluation method of a plastic material includes: a first shearing process of performing simple shearing deformation with respect to a first plastic sheet; a second shearing process of performing simple shearing deformation with respect to a second plastic sheet; a first partial stress-strain curve data obtaining process of obtaining first partial stress-strain curve data; a second partial stress-strain curve data obtaining process of obtaining second partial stress-strain curve data; and a synthesized stress-strain curve data obtaining process of obtaining synthesized stress-strain curve data based on the first partial stress-strain curve data and the second partial stress-strain curve data.
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