Modeling and Eliminating Thermal Damage of Surface Integrity in Dry and Cryogenic Superfinish Hard Turning

干式和低温超精硬车削中表面完整性热损伤的建模和消除

• 批准号: 9700095
• 负责人: C. Richard Liu
• 金额: $ 9.99万
• 依托单位: Purdue Research Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-07-01 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9700095&HistoricalAwards=false
• 关键词: Modeling; Eliminating; Thermal; Damage; Surface

9700095 Liu It was recently shown feasible to use hard turning in selected conditions to superfinish surfaces. However, just like grinding, hard turning as a finish process may produce thermal damage to the integrity of a machined surface if the machining conditions create too much heat conducted into the machined surface. The objectives of this research project are: (1) to study the integrity of machined surface by hard turning; (2) to develop a model to estimate the onset and upper bound of the thermally damaged layer as a function of machining conditions including flank wear; and (3) to study various innovative methods of extending the limit imposed by surface damage (resulted by flank wear) for the purpose of longer tool utilization. This research addresses the problem of thermal damage in hard turning, with the potential practical result of removing thermal burn as a major obstacle toward widespread application of hard turning. It holds the promise of replacing separate grinding and abrasive-based superfinish as a process for finishing hardened workpieces.

9700095 Liu 最近的研究表明，在选定的条件下使用硬车削来超精加工表面是可行的。 然而，就像磨削一样，如果加工条件产生过多的热量传导到加工表面，硬车削作为精加工工艺可能会对加工表面的完整性产生热损坏。 本研究项目的目标是：（1）研究硬车削加工表面的完整性； (2) 开发一个模型来估计热损伤层的起始点和上限，作为包括后刀面磨损在内的加工条件的函数； (3) 研究各种创新方法，以扩大表面损伤（由后刀面磨损引起）的限制，以延长刀具的使用寿命。 这项研究解决了硬车削中的热损伤问题，具有消除热烧伤这一硬车削广泛应用的主要障碍的潜在实际成果。 作为精加工硬化工件的工艺，它有望取代单独的磨削和基于磨料的超精加工。