Fundamental Research on the standardization of CSG data for Solid Model in CAD/CAM

CAD/CAM实体模型CSG数据标准化基础研究

• 批准号: 61460090
• 负责人: OKINO Norio
• 金额: $ 3.07万
• 依托单位: Kyoto University (1987-1988)Hokkaido University (1986)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61460090/
• 关键词: CAD; CAM; CSG; SOLID MODEL; GEOMETRIC MODELING; CAM

Objectives of this investigation are as follows which are for the proposal on the standardization of CSG shape data for solid model used in CSD/CAM.1. To obtain uniqueness of CSG(Constructive Solid Geometry) data structure. 2. To garantee possibility of mutual conversion between standard and other CSG data. 3. To develope a man machine interface to generate standard CSG data. 4. To develope a conversion method from CSR data to B-Reps(Boundary Represontaions) data 5. To propose the standard CSG data format and data structure. 6. To develope an interface to input shapes described by the standard and some application programs for computer graphics, NC code generator and robot simulator.These objectives have been performed. The proposed CSG tandard consists of 16 primitives such as cuboid, cylinder and cone, etc. Surfaces of these primitives are formed by quadratic equations. Both types of CSG structure, the tree structure and the 2 layers structure, can be combined as the standard data structure. And the hierarchical structure of segment-macro-part-unit is adopted where segments and macros are related by set opration of union, intersection and difference, and every part is connected by the operators; slide, rotation and fix.

本研究的目的是为CSD/CAM中实体模型CSG形状数据的标准化提出建议。为了获得CSG（Constructive Solid Geometry）数据结构的唯一性。2.保证标准CSG数据与其他CSG数据之间相互转换的可能性。3.开发人机界面，生成标准CSG数据。4.开发CSR数据到B-Reps（Boundary Represontaions）数据的转换方法提出标准CSG数据格式和数据结构。6.开发了标准形状输入接口，并开发了计算机图形学、NC代码生成器和机器人模拟器等应用程序。CSG标准由长方体、圆柱体、圆锥体等16个基元组成，基元的曲面由二次方程组构成。两种类型的CSG结构，树结构和2层结构，可以组合为标准数据结构。采用"段-宏-部件-单元"的层次结构，段与宏之间通过并、交、差等集合运算联系起来，各部件之间通过滑动、旋转、固定等算子连接起来。

项目成果

Yoshiyuki Shiroma;Yukinori Kakazu;Norio Okino: Proceedings of the Intenational Conaerence of Production Engineering Beijing. 287-293 (1988)

Yoshiyuki Shiroma；Yukinori Kakazu；Norio Okino：国际生产工程会议录北京。

城間祥之: 精密工学会誌. 53-2. 308-314 (1987)

Yoshiyuki Shiroma：日本精密工程学会杂志 53-2（1987）。

Yoshiyuki Shiroma; Yukinori Kakazu; Norio Okino: "Blended Free-Form Primitives For CSG Modeling" Proc. of the International Conference of Production Engineering. Beijing. 287-293 (1988)

城间芳幸；

城間祥之;沖野教郎;嘉数侑昇: 精密工学会誌. 53-2. 308-314 (1987)

Yoshiyuki Shiroma；Y. Kakazu：日本精密工程学会杂志 53-2（1987）。

渡部広一;嘉数侑昇;沖野教郎: 精密工学会誌. 53-2. 315-321 (1987)

Koichi Watanabe；Yunobo Kakazu；Norio Okino：日本精密工程学会杂志 53-2（1987）。