| 摘要 |
An end mill with stepped pattern of cutting, in housing of which concentrically to the axis cutting elements are located which are alternatively made with smaller angle in the plane and with apexes displaced toward its axis. Furthermore, on the cutting edges from the side of auxiliary edges additional main cutting edges are made which are divided by transition sections with main edges, smaller cutting angle of additional main edge corresponds to larger cutting angle of main edge in plane, and to smaller cutting angle of main edge in plane corresponds larger cutting angle of additional main edge, outside diameter of the arrangement of apex of the transition sections, which contain main edges with smaller cutting angle, exceeds the inside diameter of the arrangement of the apex of transition sections with smaller cutting angle of additional main edges and furthermore all transition sections are located in one plane. |
