The helical grinding procedure is assuming the requirements imposed to the grinding procedure of the curved cutting edge twist drills, respectively: variable setting angle, increasing from the outskirts towards the point tool; solves the variable constructive clearance angle, increasing from the outskirts (where the thickness of chip is small), to the tool axis; provides the symmetry grinding for the main cutting edges; the normal rake angle, increasing towards the drill outskirts, at outskirts being equal with the helix angle; the kinematics of the grinding procedure is simple, and comparable with that of the standard drill grinding procedures.
| Number of Pages : | 7 |
| Published : | 11/01/1999 |
