Research Initiation: Temperature Prediction in Ultra- Precision Machining

本项目涉及超精密加工中温度的研究。本文将建立一个分析模型，分析由于弹性恢复和可能的侧面磨损而产生的刀具-工件界面摩擦加热。在剪切区加热，前面和侧面将耦合。将提供热量分配和产生的温度对工艺变量和工具/工件材料组合的功能依赖。将在超精密机床上进行切削试验，以提供模型输入数据并进行验证。由此产生的预测能力和对控制物理的洞察将大大增加对超精密加工中切屑形成机制、刀具性能和磨损以及由此产生的工件亚表面损伤和残余应力状态的理解。这将导致在超精密加工过程中提高加工工件的精度和质量。

This project deals with the study of the temperatures in ultra-precision machining. An analytical model will be developed which generates the frictional heating at the tool-workpiece interface due to elastic recovery and possible flank wear. Heating at the shear zone, rake face and flank face will be coupled. Functional dependence of the partitioning of heat and the resulting temperatures on the process variables and tool/workpiece material combinations will be provided. Cutting tests will be performed on ultra-precision machine tools to provide model input data and verification. The resulting predictive capability and insight into the governing physics will significantly increase the understanding of the mechanics of chip formation in ultra precision machining, tool performance and wear, and the resulting workpiece subsurface damage and residual stress state. This will lead the way to improved accuracy and quality of the machined workpiece, in the ultra precision machining process.