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    Method and system for determining heating point and heating line in bending of steel plate
    2.
    发明授权
    Method and system for determining heating point and heating line in bending of steel plate 失效
    确定钢板弯曲加热点和加热线的方法和系统

    公开(公告)号：US06298310B1

    公开(公告)日：2001-10-02

    申请号：US09159758

    申请日：1998-09-24

    申请人： Takayuki Kawano ,  Yoshiaki Inoue ,  Ryuuichirou Kikutsugi ,  Kazuaki Oota ,  Fukumi Hamaya ,  Hidetsugu Koiwa ,  Shouji Kawakado ,  Takeshi Nakahama

    发明人： Takayuki Kawano ,  Yoshiaki Inoue ,  Ryuuichirou Kikutsugi ,  Kazuaki Oota ,  Fukumi Hamaya ,  Hidetsugu Koiwa ,  Shouji Kawakado ,  Takeshi Nakahama

    IPC分类号： B21D1120

    CPC分类号： B21D11/20

    摘要： A method and a system for determining a heating point and a heating line in steel plate bending place a virtual wooden pattern on a virtual steel plate; roll the wooden pattern or steel plate along a frame line from a reference position to contact the wooden pattern and steel plate at two points A, B on the steel plate and C, D on the wooden pattern; roll the wooden pattern or steel plate in the reverse direction for return to the reference position; obtain straight lines U, V connecting the contact points A, B and C, D, respectively; determine a heating point relative to a reference point based on an intersection point of the straight lines U, V; repeat the same steps while contacting the contact points A, C on a reference point side to use their contact point as a new reference point, to determine respective heating points along a specific line up to the end of the steel plate; draw straight lines from a certain heating point on a certain line to heating points on other lines based on the determined heating points; examine the degree of parallelism between each straight line and a roller line; if the degree is within a predetermined range, group the relevant heating points as the same group; and connect the heating points of the same group by a straight line or a curve to determine a heating line.

    摘要翻译： 用于确定钢板弯曲加热点和加热线的方法和系统将虚拟木制图案放置在虚拟钢板上; 将木制图案或钢板沿着框架线从参考位置滚动，以钢板上的两个点A，B和木头图案上的C，D接触木制图案和钢板; 沿相反方向滚动木纹或钢板返回参考位置; 分别连接接点A，B，C，D的直线U，V; 基于直线U，V的交点确定相对于参考点的加热点; 重复相同的步骤，同时接触参考点一侧的接触点A，C，以使其接触点作为新的参考点，以确定沿着钢板端部的特定线路的各个加热点; 根据确定的加热点将直线从某一线上的某个加热点拉到其他管线上的加热点; 检查每条直线与滚线之间的平行度; 如果程度在预定范围内，则将相关加热点组合为同一组; 并通过直线或曲线连接同一组的加热点，以确定加热线。

    Computer aided design system and computer aided design program using a geometric surface model
    6.
    发明授权
    Computer aided design system and computer aided design program using a geometric surface model 有权
    计算机辅助设计系统和计算机辅助设计程序使用几何表面模型

    公开(公告)号：US07917342B2

    公开(公告)日：2011-03-29

    申请号：US10529645

    申请日：2003-10-06

    申请人： Masami Miura ,  Takayuki Kawano ,  Yuichi Sasaki ,  Takeshi Nakahama ,  Yasuhiko Yoshida

    发明人： Masami Miura ,  Takayuki Kawano ,  Yuichi Sasaki ,  Takeshi Nakahama ,  Yasuhiko Yoshida

    IPC分类号： G06F17/50 ,  G06F7/60 ,  G06T15/00 ,  G06T11/20

    CPC分类号： G06T17/20 ,  G06T17/30

    摘要： A computer aided design system and a computer aided design program which can greatly increase the utility of a computer aided design model, and can improve the efficiency of design and production processes, by adopting a curved surface theory which ensures the continuity of a free-form line or surface. A computer executes: a point sequence information extraction process for extracting a plurality of point sequences on a curved surface; a dividing process for generating a curved surface from the point sequences and dividing the curved surface into a predetermined number of mesh points; a first fundamental form computing process for computing coefficients of the first fundamental form; a second fundamental form computing process for computing coefficients of the second fundamental form; and a storage process for storing the point sequence information, the coefficients of the first fundamental form and the coefficients of the second fundamental form.

    摘要翻译： 计算机辅助设计系统和计算机辅助设计程序，可大大增加计算机辅助设计模型的实用性，并可以通过采用曲面理论来提高设计和生产过程的效率，从而确保自由形式的连续性 线或表面。 计算机执行：用于提取曲面上的多个点序列的点序列信息提取处理; 从所述点序列生成曲面并将所述曲面分割成预定数目的网格点的分割处理; 用于计算第一基本形式的系数的第一基本形式计算过程; 用于计算第二基本形式的系数的第二基本形式计算过程; 以及用于存储点序列信息，第一基本形式的系数和第二基本形式的系数的存储处理。

    Cad system and cad program
    8.
    发明申请
    Cad system and cad program 有权
    Cad系统和cad程序

    公开(公告)号：US20060129361A1

    公开(公告)日：2006-06-15

    申请号：US10529645

    申请日：2003-10-06

    申请人： Masami Miura ,  Takayuki Kawano ,  Yuichi Sasaki ,  Takeshi Nakahama ,  Yasuhiko Yoshida

    发明人： Masami Miura ,  Takayuki Kawano ,  Yuichi Sasaki ,  Takeshi Nakahama ,  Yasuhiko Yoshida

    IPC分类号： G06F17/10

    CPC分类号： G06T17/20 ,  G06T17/30

    摘要： There is provided a computer aided design system and a computer aided design program which can greatly increase the utility value of a computer aided design model, and can improve the efficiency of design and production processes, by adopting a curved surface theory which ensures the continuity of a free-form line/free-form surface. A computer executes: a point sequence information extraction process for extracting a plurality of point sequences on a curved surface; a dividing process for generating a curved surface from the point sequences using another computer graphics program, and dividing the curved surface into a predetermined number of meshes; a first fundamental form computing process for computing coefficients of the first fundamental form defined by a tangent vector which forms a tangent plane of the mesh; a second fundamental form computing process for computing coefficients of the second fundamental form defined by the tangent vector and a normal vector of the mesh; and a storage process for storing the point sequence information, the coefficients of the first fundamental form and the coefficients of the second fundamental form.

    摘要翻译： 提供了计算机辅助设计系统和计算机辅助设计程序，可以大大提高计算机辅助设计模型的效用值，并且可以通过采用曲面理论来提高设计和生产过程的效率，从而确保连续性 自由形式的线/自由曲面。 计算机执行：用于提取曲面上的多个点序列的点序列信息提取处理; 用于使用另一计算机图形程序从所述点序列生成曲面并将所述曲面分割成预定数目的网格的分割处理; 用于计算由形成网格的切平面的切线向量定义的第一基本形式的系数的第一基本形式计算过程; 用于计算由切线向量和网格的法向量定义的第二基本形式的系数的第二基本形式计算过程; 以及用于存储点序列信息，第一基本形式的系数和第二基本形式的系数的存储处理。

    Method and system for determining heating point and heating line in bending of steel plate
    9.
    发明授权
    Method and system for determining heating point and heating line in bending of steel plate 失效

    公开(公告)号：US06385556B1

    公开(公告)日：2002-05-07

    申请号：US09834604

    申请日：2001-04-16

    申请人： Takayuki Kawano ,  Yoshiaki Inoue ,  Ryuuichirou Kikutsugi ,  Kazuaki Oota ,  Fukumi Hamaya ,  Hidetsugu Koiwa ,  Shouji Kawakado ,  Takeshi Nakahama

    发明人： Takayuki Kawano ,  Yoshiaki Inoue ,  Ryuuichirou Kikutsugi ,  Kazuaki Oota ,  Fukumi Hamaya ,  Hidetsugu Koiwa ,  Shouji Kawakado ,  Takeshi Nakahama

    IPC分类号： B21D1120

    CPC分类号： B21D11/20

    摘要： A method and a system for determining a heating point and a heating line in steel plate bending place a virtual wooden pattern on a virtual steel plate; roll the wooden pattern or steel plate along a frame line from a reference position to contact the wooden pattern and steel plate at two points A, B on the steel plate and C, D on the wooden pattern; roll the wooden pattern or steel plate in the reverse direction for return to the reference position; obtain straight lines U, V connecting the contact points A, B and C, D, respectively; determine a heating point relative to a reference point based on an intersection point of the straight lines U, V; repeat the same steps while contacting the contact points A, C on a reference point side to use their contact point as a new reference point, to determine respective heating points along a specific line up to the end of the steel plate; draw straight lines from a certain heating point on a certain line to heating points on other lines based on the determined heating points; examine the degree of parallelism between each straight line and a roller line; if the degree is within a predetermined range, group the relevant heating points as the same group; and connect the heating points of the same group by a straight line or a curve to determine a heating line.