Non true orbicular hole process manner and non true orbicular hole processed device

摘要

PPROBLEM TO BE SOLVED: To provide a method for boring a non-round hole with which a work can be bored at high speed and with a high degree of accuracy. PSOLUTION: In the method for boring a non-round hole, a bore of which shape is the same as the shape of a non-round cross section bore already formed in a cylinder block is formed in a cylinder block. More specifically, the method includes an inside diameter shape data acquiring process in which two or more measurement points are set on the axis of the already formed bore and an inside diameter shape of the bore at each of two or more measurement points is measured to be acquired as inside diameter shape data, an analyzed inside diameter shape parameter calculation process in which frequency analysis is performed on the inside diameter shape data and the amplitude and phase values of the frequency components of the zero-th order to the n-th order (n is a natural number) are calculated as analyzed inside diameter shape parameters, and a storage process of analyzed inside diameter shape parameters in which the inside diameter shape parameters are stored in an electronic storage medium of a boring device. PCOPYRIGHT: (C)2010,JPO&INPIT