CAREER: Cost-Effective Precision Form Grinding of Advanced Materials

职业：先进材料的经济高效的精密成型磨削

• 批准号: 0449797
• 负责人: Albert Shih
• 金额: --
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-05-31 至 2006-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0449797&HistoricalAwards=false
• 关键词: CAREER; Cost; Effective; Precision; Form

The goals of this Faculty Early Career Development (CAREER) Program research grant are to study two precision form grinding technologies for advanced materials and to develop web-based mechanical engineering design courses for undergraduate and graduate education. The increased utilization of advanced materials, complexity of parts, and the requirements of tighter form tolerances and surface finish along with the pressure to reduce cost demand the development of new cost-effective form grinding technologies. Diamond, the hardest material known to exist, has long been recognized as the only abrasive that works effectively in the grinding of ceramics and other advanced materials. The generation of micrometer-scale precision forms on diamond wheels has proven difficult due to the excess wear of the diamond tool during truing of diamond grinding wheels. This study plans to investigate the use of the cylindrical wire Electrical Discharge Machining (EDM) process to generate the desired form on a rotating metal bond diamond wheel and to use the conventional abrasive on low thermal conductivity ceramic materials, such as zirconia. Research tasks include analysis of the chip formation mechanism in grinding, modeling the energy partition and grinding temperature, studying the erosion mechanism for cylindrical wire EDM of metal bond diamond wheels, and thermal modeling of cylindrical wire EDM of metal bond diamond wheels. The success of this research project will lead to a better understanding of the cylindrical wire EDM process and to the development of a new mechanism for grinding low thermal conductivity ceramic materials. These results will help lower the cost and improve the accuracy of machining components made of advanced materials. The Internet technology will be used extensively to disseminate and integrate the results in the proposed web-based course development. It will offer rapid and efficient access to knowledge andinformation in machine and process design and development.

本学院早期职业发展（Career）计划研究基金的目标是研究两种先进材料的精密成形磨削技术，并为本科和研究生教育开发基于网络的机械工程设计课程。随着先进材料利用率的提高，零件的复杂性，对形状公差和表面光洁度的要求越来越严格，以及降低成本的压力，要求开发新的具有成本效益的形状磨削技术。金刚石是已知存在的最硬的材料，长期以来一直被认为是唯一能有效磨削陶瓷和其他高级材料的磨料。由于金刚石砂轮加工过程中金刚石刀具的过度磨损，在金刚石砂轮上产生微米尺度的精密形状已被证明是困难的。本研究计划研究使用圆柱形线材电火花加工（EDM）工艺在旋转金属结合剂金刚石砂轮上产生所需的形状，并在低导热陶瓷材料（如氧化锆）上使用传统磨料。研究任务包括磨削切屑形成机理分析、能量分配和磨削温度建模、金属结合剂金刚石砂轮圆柱线材电火花加工冲蚀机理研究、金属结合剂金刚石砂轮圆柱线材电火花加工热建模等。该研究项目的成功将有助于更好地理解圆柱线材电火花加工工艺，并开发出一种研磨低导热陶瓷材料的新机制。这些结果将有助于降低成本，提高加工由先进材料制成的零件的精度。互联网技术将广泛用于传播和整合拟议的网络课程开发的结果。它将为机器和工艺设计和开发提供快速有效的知识和信息访问。