CUTTING WORK DEVICE, VIBRATION CONDITION PRESENTING APPARATUS, AND VIBRATION CONDITION PRESENTING METHOD

摘要

PROBLEM TO BE SOLVED: To satisfactorily machine a fine deep hole or the like by conveniently presenting a vibration condition by an actuator.;SOLUTION: In vibrating a drill, a cutting time ratio Rc and a positive speed time ratio Rv are defined. These cutting time ratio Rc and positive speed time ratio Rv are made dimensionless by a frequency ratio Fv/Fd of vibration frequency Fv to drill rotation frequency Fd and by an amplitude ratio A/fz of vibration amplitude A in the axial direction to feeding fz per blade. Each value of the cutting time ratio Rc and the positive speed time ratio Rv is mapped by the frequency ratio Fv/Fd and the amplitude ratio A/fz. When the mapping is used, an index for evaluating a machining state can be obtained from input values such as vibration waveform, the number of rotations of a tool, and tool feeding speed. Then, from the index, the vibration conditions where division of chips into sections and cooling of tool edges are expected or those where reduction in cutting resistance is expected, can be easily obtained.;COPYRIGHT: (C)2013,JPO&INPIT