Chip removing machining of a workpiece while applying high pressure cooling liquid

A method for the chip removing machining of a workpiece, utilizing a cutting tool comprising a a tool body defining a longitudinal axis and including a mounting portion and a cutting portion situated along an axis, the cutting portion projecting from the mounting portion in a direction constituting a forward direction and having a forward free end at which is mounted a cutting insert, the cutting insert including a generally upwardly facing chip surface and a generally forwardly facing flank surface, and a cutting edge disposed at a transition between the chip face and the flank surface, an over-cooling nozzle arranged for directing a jet of cooling liquid downwardly and forwardly toward a first contact area between the workpiece and the chip surface of the cutting insert, and a sub-cooling nozzle arranged at a generally forwardly facing front surface of the forward free end portion and situated forwardly of and below the over-cooling nozzle for directing a jet of cooling liquid upwardly from beneath the seat toward a second contact area between the workpiece and the flank surface of the cutting insert, the method comprising the steps of:

• A) effecting relative movement between the workpiece and the cutting insert for cutting chips from the workpiece, and
• B) emitting, during step A, first and second jets of cooling liquid from the over-cooling nozzle and the sub-cooling nozzle, respectively, the first jet traveling downwardly and forwardly toward the first contact area, and the second jet traveling upwardly toward the second contact area from a location disposed forwardly of and below the over-cooling nozzle and beneath the insert.