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.

小行星9700095 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传导到加工表面中，则作为精加工工艺的硬车削可能对加工表面的完整性产生热损伤。 本研究计画之目的为：（1）研究硬态车削加工表面之完整性：（2）发展一模型，以评估热损伤层之起始与上限，作为包括后刀面磨损之加工条件之函数;（3）研究各种扩大表面损伤极限的创新方法（由后刀面磨损引起），以实现更长的刀具利用率。 本研究针对硬态车削加工中的热损伤问题进行了研究，并指出了消除热烧伤这一硬态车削加工广泛应用的主要障碍的潜在实际效果。 它有望取代单独的磨削和磨料超精加工作为一种加工硬化工件的工艺。