Patent ID: 8146464
Filing Date: 2012-04-03
Classification: B23B,Y10T

Abstract:
1. A machine tool machining a surface to be machined located on an inner surface of a workpiece, the machine tool comprising: a workpiece holding mechanism fixedly holding the workpiece; a tool having a supporting member and a cutting tool which is supported to be pivotable about a pivot axis located on a plane perpendicular to an axis of the supporting member and has a cutting edge at least at one end; an axial feed mechanism rotating the supporting member about the axis and moving the supporting member in a direction of the axis; a pivot driving mechanism pivoting the cutting tool about the pivot axis; and a machining control mechanism controlling a pivot angle of the cutting tool decided by said pivot driving mechanism and a rotation speed and an axial-direction position of the supporting member decided by said axial feed mechanism, so as to make a machining point by the cutting edge move along a desired machining line.