CONTROL OF THE MECHANICAL PROPERTY ON MACHINED SURFACE BY A NEW TOOL FOR CUTTING-BURNISHING COMBINED PROCESS

摘要

We have developed a new tool that is called as the "Compressive Residual Stress Generating cutter" (CRSG cutter). The CRSG cutter can generate effective compressive residual stress within the machined surface concurrently with the milling process. It is expected to improve mechanical properties such as the fatigue life and the resistance to stress corrosion cracking. The purpose of this study is to investigate the possibility of controlling the residual stress state within the machined surface with varying the machining conditions using the CRSG cutter. It was shown that the quantity of the plastic deformation of the machined surface affects the residual stress. The setting of the machining conditions with the CRSG cutter can control the plastic deformation quantity. The cross feed width can change plastic deformation on the machined surface that is the key factor in order to control the residual stress within the machined surface.