Metal cutting inserts with abrasive bodies

摘要

The present invention relates to a cutting tool insert of a generally polygonal shape provided with a ceramic tip brazed in a recess in at least one of its corners with a bottom surface (E) and at least one side surface (F). The bottom surface of the recess is provided with rails (D) with a height h=50-100 µm, a width w=100-200 µm and spaced apart at distance 1=0.75-1.25 mm. The invention also relates to a method of making such an insert using a grinding wheel of a suitable profile before or after sintering or in the pressing operation.