New Method of Pre-Stress Hard Cutting for Screw Shaft
The import mechanical components and burden part in aeronautic and automobile industry, such as screw shaft, aero-bearing and engine vane etc. are often found fatigue failure cased by their residual stress state on machined surface. Aiming at the problem, this paper presents a new green machining technology by integrating pre-stress cutting and hard machining method. The principle of pre-stress hard cutting of shaft part is introduced together with its implementary process in this paper. Pre-stress loading method on screw shaft is investigated and device for actualizing the process is designed. Experiment of pre-stress hard cutting is carried out for screw shaft with PCBN tool. The experimental results show that by using this method, residual compressive stress is got on machined surface and hence increase the quality and fatigue life of screw shaft.
Bo Zhao, Guanglin Wang, Wei Ma, Zhibo Yang and Yanyan Yan
B. Y. Ye et al., "New Method of Pre-Stress Hard Cutting for Screw Shaft", Key Engineering Materials, Vol. 455, pp. 481-485, 2011