| 摘要 |
PURPOSE: To provide a freely indexing cutting insert capable of 90 deg. shoulder milling at a positive chipping angle. CONSTITUTION: An insert for a milling cutter has a chip face 11 and a bottom face 12 which are interconnected by side surfaces 14 and 15. The intersection of side surfaces 14 and 15 with the chip face 11 forms cutting blades 16 and 17. The side surfaces 14 and 15 are beveled at their respective intersections with cutting blades 16 and 17 to form planar clearance faces 20, the width of which increases toward one of the cutting corners. The cutting blades 16 and 17 include main blade sections 16' and 17' respectively, corner blade portions and second blade portions 16" and 17". The second blade portions 16" and 17" are interconnected with their respective main blade portions 16' and 17' and corner blade portions. The second blade portion 17" arranged on one side of a corner is placed at an angle of 90 deg. relative to the main blade portion 16' arranged on the other side of the corner. |
