鋼材の硬さと切削条件がせん断角に関する実験式の係数に及ぼす影響

抄録

Shear angles must be estimated to obtain cutting temperatures and other data from shear plane models. The shear angle is known to be affected by the cutting speed and hardness of the work material, however there is no equation that takes these factors into account. Therefore, this study describes an experimental equation for shear angle that takes into account cutting conditions and material properties. In the experiment, the experimental equation for shear angle proposed in the past for quasi-orthogonal cutting on a lathe is verified to be valid in actual orthogonal cutting. The coefficients of the experimental equation are expected to depend on the hardness of the material and the cutting conditions. Therefore, the coefficients were calculated by performing orthogonal cutting on S55C whose hardness was changed by heat treatment under several different cutting conditions, such as cutting speed and cutting thickness. As a result, it was found that the relationship between various cutting conditions and shear angle that was established in quasi-orthogonal cutting was also established in actual orthogonal cutting. Experiments also revealed the values of the coefficients of the experimental equation.