Patent ID: 8662959
Filing Date: 2014-03-04
Classification: B23B,B23Q,B24B,Y10T

Abstract:
1. A method of cutting a workpiece made of a highly hard material, comprising cutting the workpiece using a machining device comprising: a workpiece holder that holds the workpiece; a tool holder that holds a tool; a rotation drive mechanism that rotates the workpiece holder; and a relative moving mechanism that relatively moves the workpiece holder and the tool holder at least in two axial directions orthogonal to each other, wherein positioning errors of the machining device in the axial directions of the relative moving mechanism are 5 nm or less; the tool is made of a single crystal or multicrystal diamond; the workpiece is cut while a rotating speed of the rotation drive mechanism and a movement of the relative moving mechanism are controlled so that a chip thickness of the workpiece cut by the tool is 20 to 60 nm; the relative moving mechanism includes: a fixed member; a moving member that moves relative to the fixed member; a guide mechanism provided between the fixed member and the moving member; and a linear drive mechanism that moves the moving member relative to the fixed member, the linear drive mechanism is provided by a linear motor mechanism, and the guide mechanism is a rolling guide mechanism including: a pair of V-grooves parallely provided on the fixed member along a moving direction of the moving member and spaced away from each other; V-shaped ridges protruding from the moving member that are opposing to the V-grooves; and rolling members interposed between inclined surfaces of the V-grooves and the ridges.