Research Of The New Sharpening Method Of The Twist Drill's Flank

In order to advance the cutting property of drills, the geometric shape and material are advanced constantly. Up to now, there are over a hundred of drill shapes and over ten of them are widely used, it is because many drill shapes are too complicated to achieve by mechanical sharpening method. In order to invent a new drill shape, we must set up its mathematical model and study it carefully. All the work are the basis of achieving mechanical sharpening. The research on flank's mathematical model and sharpening method are the most important part of achieving mechanical sharpening.The cone sharpening method is a widely used method. But the the phenomenon of the tail's raising of the conical drill will appear when the sharpening parameters aren't proper. The helical sharpening method can be achieved easily, but the drill's core produced by this method was not strong enough. So a new sharpening method- helical cone sharpening method has been put forward in this paper on the basis of the conical method and helical method. After that a new helical cone sharpening method is put forward by advancing helical cone sharpening method.In order to tset the comprehensive properties of the drill, the 3D model of the drill's cone has been established in CATIA and the distribution of the circumferential clearance angle is measured. The strength of the cone is increased and the phenomenon of the tail's raising is avoided through the result of the test. After that, the cutting properties of the two sharpening method is compared through the cutting FEM simulation in Deform3D. We draw a conclusion that the cutting properties of the drll sharpened by the new helical cone sharpening method is better than conical method and helical method.In order to achieve the mechanical sharpening method , a preliminary study on new helical cone sharpening method is done on the basis of the existing mechanical sharpening method.