CUTTING TIP Russian patent published in 1998 - IPC

FIELD: metal working with chip forming. SUBSTANCE: at least one edge of cutting tip is connected with upper chip escape surface over lines forming major cutting edge and angular cutting edge. Upper chip escape surface is provided with strengthening land adjoining the above-mentioned cutting edges. Elongated bent projection is made near at least one angular cutting edge; concave side of this projection is directed towards edge. Height of projection does not exceed height of angular cutting edge in angle bisector. Projection and angular cutting edge with strengthening land bound the surface which is located on lower level as compared with this land and projection. Provision is made for control of removal of chip from work, especially in turning at external and internal profiling and facing. EFFECT: improved control of chip escape at small cutting depth and high feed rates; reduction of heat transfer of cutting tip; increased service life of cutting tip. 2 cl, 6 dwg