ROUND HOLE MACHINING METHOD AND ROUND HOLE MACHINING DEVICE

摘要

A round hole machining method and a round-hole machining device in which machining can be accurately performed regardless of a residual stress caused by casting. An out-of-round hole machining device, which carries out inner diameter machining for a bore in a cast cylinder block includes the following: a stress deformation amount correspondence table that stores, for each portion of the cylinder block, a stress deformation amount based on stress that resides in the cylinder block during casting; a machining shape prediction section that predicts the machining shape on the basis of the stress deformation amount read from the stress deformation amount correspondence table; and a motor control unit that reverses the predicted machining shape with respect to a target shape and carries out reverse machining on a workpiece.

主权项

1. A round hole machining method of performing inside diameter machining on a cast work,
wherein first master data storing an amount of stress deformation per part of the cast work is provided, and the round hole machining method comprises: a step of predicting, in the inside diameter machining, a machining shape of the cast work based on the amount of stress deformation read from the first master data; and a step of performing the inside diameter machining on the cast work such that an inverted shape obtained by inverting the machining shape predicted in the step with respect to a target shape is formed.