Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 04, 2024 - October 05, 2024
In the field of machining with special shape tool with curved edges, it is recognized that the posture of the tool effect of the cutting surface properties. However, the specific effects of this posture are not yet fully understood. The tools are known for their high efficiency in machining, but the shape of the cutting edge imposes limitations on the tilt angle. Consequently, our study concentrated on the lead angle, which offers a relatively high degree of freedom. We conducted a series of cutting experiments in which the lead angle was the only variable and developed a cutting model using a 3D CAD system. Observations of the cutting surface and cutting chips revealed that when the lead angle was positive, the cutting process became unstable, and a deterioration in surface properties. The cutting model demonstrated that the crosssectional area at the commencement of the cut is reduced under these conditions. Furthermore, during one complete rotation of the tool, the cutting edges are disengaged from the cut within the range that remains on the cutting surface. Therefore, when the lead angle is positive, the cutting mechanism is more susceptible to unstable cutting and burr formation.
