金属切削に関する基礎的研究(第1報) : 新しい考察による切削力の解析

抄録

Cutting forces were annalyzed by a new theory which maintains that they involved not only deformtion-forces of chips, but indentation-forces of a cutting edge into works. By this theory, the following "Metal-Cutting Paradoxes" were clearly solved theoretically. (i) A specific-cuttng force increases as the depth of cut decreases. (ii) A coeff. of friction increases with a cutting angle or the decrease of depth of cut. (iii) A shearing stress of chip deformation increases with the decrease of depth of cut and its value is extremely high compare with a statical value. (iv) A cutting force unexpectedly increases when a cutting angle is exceptionally small. Two compornents at orthogonal cuttings of duralumin, using the E.M.S. type cutting force dynamometer were measured and the new theory was verified experimentally. It was made clear that the intendation-forces were produced by an elastic deformation of cutting edge.