Optimal Pre-stressing the Surface of a Component by Superfinish Hard Turning for Maxium Fatigue Life

本课题旨在研究和优化超精硬车削加工表面的疲劳寿命。这将通过：(1)建立超精加工硬车削表面的加工条件、刀具磨损、表面完整性和疲劳寿命之间的关系模型，以及(2)开发一种方法，通过在疲劳寿命的最佳切削条件下产生最佳残余应力分布来实现最佳预应力。该研究成果将为轴承、齿轮、凸轮、轴、刀具、模具等制造行业提供单点加工取代磨削和超精加工的技术支持，对超精加工硬车削表面疲劳寿命的提高具有基础性意义。该项目的一大优势是其强大的行业参与和支持。

This research project is to study and optimize the fatigue life for surfaces machined by superfinish hard turning. This will be accomplished by: (1) modeling the relationship between machining conditions, tool wear, surface integrity, and fatigue life of the superfinish hard turned surface, and (2) developing a methodology enabling optimal pre-stressing, through the optimal residual stress distribution generated by the best cutting conditions for fatigue life. The research results could lead to the replacement of grinding and superfinishing by single-point machining, benefiting the manufacturing industries that make bearings, gears, cams, shafts, tools, dies, etc. The research is fundamental and could lead to a significant improvement in the fatigue life of superfinish hard turned surfaces. A major strength of the project is its strong industry participation and support.