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1. 发明授权

US10202809B2 Threaded joint for steel pipes 有权
公开(公告)号：US10202809B2
公开(公告)日：2019-02-12
申请号：US14763229
申请日：2013-01-28
申请人： JFE Steel Corporation
发明人： Takuya Nagahama , Osamu Sonobe , Masaki Yoshikawa , Jun Takano , Takamasa Kawai
IPC分类号： E21B17/042 , F16L15/00
摘要： A threaded joint in which the outer peripheral face of the pin nose has a single tapered shape, the seal face of the box has an outwardly convex curved shape, and a seal point xp defined by equation (1) is greater than or equal to 0.2 inches, x p = ∫ x 1 x 2 ⁢ p ⁢ ⁢ x ⁢ ⁢ d ⁢ ⁢ x F ⁢ ⁢ F = ∫ x 1 x 2 ⁢ p ⁢ ⁢ d ⁢ ⁢ x ( 1 ) where p is a contact face pressure, x is a distance from an end of the pin in a pipe axis direction, and x1 and x2 are respectively a lower limit and an upper limit of a domain of x corresponding to the seal portion.

2. 发明授权

US10169496B2 Springback amount evaluation method 有权
公开(公告)号：US10169496B2
公开(公告)日：2019-01-01
申请号：US14418869
申请日：2013-09-27
申请人： JFE STEEL CORPORATION
发明人： Hirotaka Kano , Osamu Sonobe
IPC分类号： G06F17/50 , B21D22/00 , B21J5/00 , B21K7/12 , G06F17/11
摘要： A springback amount evaluation method evaluates an amount of springback after die release of a press forming product by a computer and includes: setting a plurality of section planes intersecting a shape of the press forming product at predetermined intervals; obtaining a sectional shape of the press forming product for each of the set section planes; and obtaining an orientation of each of the sectional shapes in each section plane as a direction of the each of the sectional shapes, wherein for each of a shape to be a reference of the press forming product and a shape after the die release, the above-described three steps are performed, and the amount of springback is evaluated by comparing, for all of the section planes, the obtained directions of the sectional shapes for the shape to be the reference and for the shape after the die release.

3. 发明授权

US09953115B2 Method for specifying stretch flange limit strain and method for determining feasibility of press forming 有权
公开(公告)号：US09953115B2
公开(公告)日：2018-04-24
申请号：US14436236
申请日：2013-10-10
申请人： JFE STEEL CORPORATION
发明人： Osamu Sonobe , Akinobu Ishiwatari , Masaki Urabe , Hirotaka Kano , Jiro Hiramoto
IPC分类号： G06F17/50 , G06F17/10 , G01L5/00 , B21D22/02 , G01N3/28 , G01M99/00 , B21D19/00 , B21D53/88
CPC分类号： G06F17/5009 , B21D19/00 , B21D22/02 , B21D53/88 , G01L5/00 , G01M99/007 , G01N3/28 , G01N2203/0075 , G01N2203/0254 , G01N2203/027 , G06F17/10
摘要： A method for manufacturing a press formed part, the method including specifying stretch flange limit strain in a metal sheet by using strain gradient in a radial direction and strain gradient in a sheet thickness direction. The strain gradient in the radial direction being directed from an end portion of the metal sheet at a time a press load is applied. The strain gradient in the sheet thickness direction being a direction of the metal sheet that intersects a loading direction. Additionally, the stretch flange limit strain satisfies the formula ϵθlim=A[a·Δϵθ/Δr+b·Δϵθ/Δt]+c, where ϵθlim represents the stretch flange limit strain in a tangential direction of the sheet edge, Δϵθ/Δr represents the strain gradient in the radial direction, Δϵθ/Δt represents the strain gradient in the sheet thickness direction, A, a, and b represent influence coefficients, and c represents the limit strain at a time the strain gradient is zero.

4. 发明申请

US20150368987A1 THREADED JOINT FOR STEEL PIPES 审中-公开
标题翻译：螺纹管接头钢管
公开(公告)号：US20150368987A1
公开(公告)日：2015-12-24
申请号：US14763229
申请日：2013-01-28
申请人： JFE STEEL CORPORATION
发明人： Takuya Nagahama , Osamu Sonobe , Masaki Yoshikawa , Jun Takano , Takamasa Kawai
IPC分类号： E21B17/042 , F16L15/00
CPC分类号： E21B17/042 , F16L15/00 , F16L15/004 , F16L2201/40
摘要： A threaded joint in which the outer peripheral face of the pin nose has a single tapered shape, the seal face of the box has an outwardly convex curved shape, and a seal point xp defined by equation (1) is greater than or equal to 0.2 inches, x p = ∫ x 1 x 2  px   x F   F = ∫ x 1 x 2  p   x ( 1 ) where p is a contact face pressure, x is a distance from an end of the pin in a pipe axis direction, and x1 and x2 are respectively a lower limit and an upper limit of a domain of x corresponding to the seal portion.
摘要翻译：一种螺纹接头，其中鼻尖的外周面具有单个锥形形状，盒的密封面具有向外凸的弯曲形状，并且由等式（1）定义的密封点xp大于或等于0.2 英寸xp =∫×1×2×px××××××××××××××××××××××××××××××××××××××××××××××××××××××× 在管轴方向上，x1和x2分别是对应于密封部的x的下限和x的上限。

5. 发明申请

US20150205892A1 SPRINGBACK AMOUNT EVALUATION METHOD 审中-公开
标题翻译：弹性金额评估方法
公开(公告)号：US20150205892A1
公开(公告)日：2015-07-23
申请号：US14418869
申请日：2013-09-27
申请人： JFE STEEL CORPORATION
发明人： Hirotaka Kano , Osamu Sonobe
IPC分类号： G06F17/50 , B21J5/00 , G06F17/11 , B21K7/12
CPC分类号： G06F17/5009 , B21D22/00 , B21J5/00 , B21K7/12 , G06F17/11 , G06F2217/16 , G06F2217/41
摘要： A springback amount evaluation method evaluates an amount of springback after die release of a press forming product by a computer and includes: setting a plurality of section planes intersecting a shape of the press forming product at predetermined intervals; obtaining a sectional shape of the press forming product for each of the set section planes; and obtaining an orientation of each of the sectional shapes in each section plane as a direction of the each of the sectional shapes, wherein for each of a shape to be a reference of the press forming product and a shape after the die release, the above-described three steps are performed, and the amount of springback is evaluated by comparing, for all of the section planes, the obtained directions of the sectional shapes for the shape to be the reference and for the shape after the die release.
摘要翻译：回弹量评价方法通过计算机评价冲压成型品脱模后的回弹量，包括：以规定间隔设置与冲压成形品的形状相交的多个截面; 获得每个设定部分平面的冲压成形产品的截面形状; 并且获得每个截面形状中的每个截面形状的取向作为每个截面形状的方向，其中对于作为冲压成形产品的基准的形状和脱模后的形状，上述描述了三个步骤，并且通过比较所有截面，获得作为参考的形状和模具脱模后形状的截面形状的方向来评估回弹量。

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