Workpiece machining method, machine tool, and program

Abstract

The workpiece machining method includes a step of preparing a workpiece having a plate portion including a base material and a first coating layer covering at least a part of the base material, and a step of burring the plate portion. When a direction from the base material toward the first coating layer is defined as a first direction, the step of burring the plate portion includes forming a through hole and a flange in a first region of the plate portion by moving a rotating burring tool in the first direction. Prior to the step of burring the plate portion, a step of removing the first coating layer from the first region of the plate portion is performed.