Research on both the Dynamic Characteristics ...

Based on the cutting experiments of a hydrogenated cylindrical shell material 2.25Cr-1Mo-0.25V steel, this paper analyses the dynamic mechanical properties of extremely heavy-duty cutting, studies the influence of dynamic mechanical properties on cutting tool failure during extremely heavy-duty cutting, and builds a dynamic shear mechanical model for the cutting zone. The results of those experiments show that the flow stress of dynamic shear in the zone has a greater influence on the fatigue of the tool and the main damage form of the heavy-duty turning tool is shear fractures. After taking comprehensive theoretical analyses, it determines the critical condition of fracture failure for turning tools under extremely heavy-duty conditions.