Patent ID: 6332385
Filing Date: 2001-12-25
Classification: B23B,F16C,Y10T

Abstract:
A method of turning a metallic workpiece the method comprising the steps of:A) mounting a cutting insert in a toolholder, the cutting insert comprising a cutting edge formed of cubic boron nitride;B) rotating a workpiece having a hardness in the range 45-65 HRC about an axis; andC) establishing relative movement between the insert and the workpiece in a direction of feed, whereby the insert engages the workpiece and cuts for a distance which is shorter than an effective length of the cutting edge measured in a direction perpendicular to the feed direction, the cutting edge including opposite ends disposed out of contact with the workpiece during the feeding of the insert, such that a surface of the workpiece having a surface finish Ra no greater than 0.2 .mu.m is generated.