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US 6,332,385 B1Granted
Method of turning a rotating metallic workpiece
AssigneeSeco Tools AB
InventorsEilert Kautto, Norbert König
Life of this patent
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Abstract
A rotating metallic workpiece, the hardness of which lies within the interval of 45-65 HRC, is turned by a cutting insert while being rotated about an axis. The insert has a cutting edge made of cubic boron nitride. The cutting insert is fed in a feed direction into the rotating workpiece, by a distance which is shorter than an effective cutting edge length in order to cut a surface having a finish Ra of maximum 0.2 μm. The ends of the cutting edge are situated outside the zone of contact with the workpiece.
Claims6
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;
- and
- C) 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 μm is generated.
1 more element
Dependencies are inferred from the claim text.