초록

A method for cuffing or hard turning the surface of a workpiece comprising using a cutting tool in which a cooling fluid is supplied to the cutting area by means of at least one jet nozzle. The cooling fluid is supplied as a jet with high pressure leaving the jet nozzle with a pressure above 60 bar.

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1. A method for hard turning the surface of a workpiece of hardened steel using a cutting tool incorporating a cutting edge formed of cubic boron nitride comprising supplying a cooling fluid to a cutting area, wherein the cooling fluid is supplied as a jet with high pressure leaving the jet nozzle w

1. A method for hard turning the surface of a workpiece of hardened steel using a cutting tool incorporating a cutting edge formed of cubic boron nitride comprising supplying a cooling fluid to a cutting area, wherein the cooling fluid is supplied as a jet with high pressure leaving the jet nozzle with a pressure above 60 bar. 2. The method according to claim 1, wherein the cooling fluid jet has a pressure above 120 bar. 3. The method according to claim 1, wherein the cutting comprises hard turning of workpieces with a Rockwell hardness of 50 HRC or above using a cutting tool with a cutting edge having a Vickers-hardness of 1700 HV or above. 4. The method according to claim 1, wherein the cubic boron nitride has a Vickers hardness above 1700 HV. 5. The method according to claim 1, wherein the cooling fluid comprises water. 6. The method according to claim 1, wherein the cooling fluid comprises carbon dioxide. 7. The method according to claim 1, wherein the cooling fluid is supplied between a clearance face of the tool and the workpiece. 8. The method according to claim 1, wherein the cooling fluid is supplied to a gap between the chip and a rake face of the tool. 9. The method according to claim 1, wherein cooling fluid is simultaneously applied to a gap between the chip and a rake face of the tool and a clearance face of the tool and the workpiece material. 10. The method of claim 4, wherein the cubic boron nitride has a Vickers hardness above 2800 HV.