Kinematics Driven Geometric Modeling for Virtual Design and Manufacturing

用于虚拟设计和制造的运动学驱动几何建模

• 批准号: 9800690
• 负责人: Qiaode Jeffrey Ge
• 金额: $ 29.87万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-08-01 至 2002-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9800690&HistoricalAwards=false
• 关键词: Kinematics; Driven; Geometric; Modeling; Virtual

This grant provides funding for the development of an integrated computer-aided design/computer-aided manufaturing system for design and manufacture of kinematic freeform surfaces. The kinematic freeform surfaces have integrated geometric and kinematic control structures that embody the geometry of tool motions required for Computer Numerically Controlled (CNC) machining processes. Algorithms for synthesizing and analyzing rational Bezier and B-spline (or NURBS) based multi-parameter freeform motions will be developed. Kinematic freeform surfaces generated by the multi-parameter NURBS motions will be developed for commonly used cutting-tool geometries such as lines for wire-cut Electric Discharge Machining (EDM) processes, planes for 5-axis grinding processes, and cylinders for 5-axis milling processes. Multisensory virtual environments with multi-resolution rendering capabilities will be developed for design, approximation, and fine-tuning of kinematic freeform surfaces. Methods for analyzing and minimizing the machining errors due to discretization will be developed for generation and optimization of tool motions. A 5-axis virtual milling machine with visual, aural, and haptic feedback capabilities will be developed to simulate not only the position but also the velocity and acceleration of tool motions. The research results of this project will be validated on a real 5-axis CNC milling machine. This project represents an extension of NURBS geometry from the purely geometric domain to the kinematic domain. It offers an integrated framework for addressing geometric and kinematic problems in various stages of the virtual design and manufacturing pipeline. By incorporating kinematic issues early in the design stage, the project, if successful, would yield a new methodology and a software tool for designing sculptured shapes that are free of geometric machinability problems such as under- and over-cut. The project results will also provide a basis for concurrent design and manufacturing of dies, molds and other sculptured shapes for automobile and aerospace industries.

这项拨款资助发展一套综合电脑辅助设计/电脑辅助制造系统，以设计及制造运动自由曲面。 运动自由曲面具有集成的几何和运动控制结构，其体现了计算机数控（CNC）加工过程所需的刀具运动的几何形状。 基于有理Bezier和B样条（或NURBS）的多参数自由运动的合成和分析算法将被开发。 由多参数NURBS运动生成的运动学自由曲面将被开发用于常用的切削刀具几何形状，例如线切割电火花加工（EDM）工艺的线、5轴磨削工艺的平面和5轴铣削工艺的圆柱体。 将开发具有多分辨率渲染能力的多感官虚拟环境，用于设计、近似和微调运动自由曲面。 将开发用于分析和最小化由于离散化的加工误差的方法，以生成和优化刀具运动。 将开发具有视觉、听觉和触觉反馈能力的5轴虚拟铣床，不仅模拟刀具运动的位置，还模拟刀具运动的速度和加速度。 本项目的研究成果将在一台真实的五轴数控铣床上得到验证。 该项目代表了NURBS几何从纯几何域到运动域的扩展。 它提供了一个集成的框架，解决几何和运动学问题的各个阶段的虚拟设计和制造流水线。 通过在设计阶段早期纳入运动学问题，该项目如果成功，将产生一种新的方法和软件工具，用于设计没有几何加工性问题（如欠切和过切）的雕塑形状。 该项目成果还将为汽车和航空航天工业的模具和其他雕塑形状的并行设计和制造提供基础。