Patent ID: 6747237
Filing Date: 2004-06-08
Classification: B23H

Abstract:
A method of adjusting perpendicularity of a wire of a wire-cut electric discharge machine having a driving mechanism for driving a workpiece mounting table in direction of two rectangular axes defining a reference plane, a pair of wire guides for guiding a wire perpendicularly to the reference plane, a driving unit for driving one of the wire guides on a plane parallel to the reference plane, said method comprising the steps of:(a) arranging an adjusting jig having at least one pair of contact pieces spaced apart from each other on a reference perpendicular plane perpendicular to the reference plane, on said workpiece mounting table; (b) moving said one of the wire guides so that the wire is inclined in a direction other than a direction perpendicular to the reference perpendicular plane to enable the wire to come into contact with only one of the pair of contact pieces; (c) moving said adjusting jig so that the wire comes in contact with only said one of the pair of contact pieces and obtaining a first contact position of the wire in contact with said one of the pair of contact pieces; (d) moving said adjusting jig to enable the wire to come into contact with the other of the pair of the contact pieces; (e) moving said adjusting jig so that the wire comes into contact with only the other of the pair of contact pieces and obtain a second contact position of the wire in contact with the other of the pair of contact pieces; (f) obtaining a displacement amount of said one of the wire guides with respect to the reference perpendicular plane based on a difference between the first contact position and the second contact position; (g) moving said one of the wire guides in a direction to compensate the obtained displacement amount to adjust perpendicularity of the wire on a plane parallel to the reference perpendicular plane; (h) performing said steps (b)-(g) with respect to another reference perpendicular plane perpendicular to the reference plane to adjust perpendicularity of the wire on a plane parallel to said another reference perpendicular plane.