| 摘要 |
PURPOSE:To make good the groove cutting, by forming a truncated cone and a plural number of small protrusions with the shape of a truncated cone or spherical surface on the upper face of a throw-away chip. CONSTITUTION:On the upper face 11 which becomes the face of a throw-away chip 10, a protruding section 14 and small protrusions 15 are formed. The protruding section 14 is defined to have its center concentric with the circle D inscribing the cutter 16, and it is smaller than the inscribing circle D by 0.5-3mm. and higher than the cutter 16 by 0.1-1mm.. Each of the small protrusions is located near each of the noses 17, and formed with a height almost the same as the protruding section 14. Chips that are small in thickness are brought into contact with the protruding section 14 and the small protrusions 15, and are easily curled. Thus the chips produced during machining can be effectively disposed of. |
