Collaborative Research: GOALI: Integrated and Computerized Setup Planning and Fixture Design

合作研究：GOALI：集成和计算机化的设置规划和夹具设计

• 批准号: 0099804
• 负责人: Yiming Rong
• 金额: $ 19.95万
• 依托单位: Worcester Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-06-01 至 2005-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0099804&HistoricalAwards=false
• 关键词: Collaborative; Research; GOALI; Integrated; Computerized

The objective of this project is to research and develop an integrated framework for automatic generation of setup plans and fixture designs, applied to a wide range of components (prismatic, rotational, as well as irregular) that require machining in lathes, 3-axis machines, and 5-axis machining centers using modular, standard, or dedicated fixtures. Setup planning and fixture design are two closely related tasks. While setup planning is constrained by fixtures to be applied, it also provides guidelines for fixture design. The cyclic interaction creates the 'chicken or egg' dilemma, which is the main research barrier. This problem will be solved as follows. First, a graph representation is developed to capture the feature/tolerance relationship of a product model. Through the recognition of design datum frames, the graph is transformed to a datum-machining surface relationship graph (DMG). With considerations of production scheme (integrated, distributed, or combined operations), fixturing constraints, machine tool capability, and tolerance decomposition, DMG will be converted into a setup graph. Tolerance stack-up analysis and setup plan verification is then followed to provide information for fixture design. If successful, this research will yield both basic and applied advances. As basic research, it will provide a generalized methodology to unify current research results in setup planning and fixture design to achieve smooth integration of computer-aided design (CAD) and computer-aided manufacturing (CAM). It will also shed light on mathematics-based tolerance analysis. For practicing engineers, it will allow them to incorporate setup generation and fixture design capability into existing CAD/CAM software tools; thus, dramatically improve user productivity. The incorporation of the research results into course curriculum will broaden mechanical, industrial, and manufacturing engineering students' knowledge spectrum; thus, better preparing them for the knowledge intensive and multi-disciplinary working environment in the 21st century.

本项目的目标是研究和开发一个集成框架，用于自动生成设置计划和夹具设计，适用于需要使用模块化，标准或专用夹具在车床，3轴机床和5轴加工中心中加工的各种部件（棱柱，旋转以及不规则）。 装夹规划和夹具设计是两个密切相关的任务。 虽然安装规划受到要应用的夹具的约束，但它也为夹具设计提供了指导。 这种循环的相互作用造成了“先有鸡还是先有蛋”的困境，这是主要的研究障碍。 这个问题将按如下方式解决。 首先，开发一个图形表示来捕获产品模型的特征/公差关系。 通过对设计基准框架的识别，将图形转化为基准-加工面关系图（DMG）。 考虑到生产方案（集成、分布式或组合操作）、夹具约束、机床能力和公差分解，DMG将转换为设置图。 公差叠加分析和设置计划验证，然后提供信息夹具设计。 如果成功，这项研究将产生基础和应用方面的进展。 作为基础性研究，它将提供一个通用的方法，以统一现有的研究成果在安装规划和夹具设计，实现计算机辅助设计（CAD）和计算机辅助制造（CAM）的顺利集成。 它还将阐明基于几何学的公差分析。 对于实践工程师来说，它将允许他们将设置生成和夹具设计功能整合到现有的CAD/CAM软件工具中;从而大大提高用户的生产力。 将研究成果纳入课程，将拓宽机械、工业和制造工程专业学生的知识面，从而为他们在世纪知识密集和多学科的工作环境做好更好的准备。