Patent ID: 6615632
Filing Date: 2003-09-09
Classification: B21H,B21K,B23D,B23P,Y10T

Abstract:
A parting tool for continuous chipless separation of identical parts from a rotation-symmetric workpiece, comprising a cutting roller having a main body advancing a workpiece in a transport direction from an entry side to an exit side, said main body having a slip bevel at the entry side and a cutting screw including a screw thread having coils which define a helix line and are configured with an increase in height, said screw thread including in series an entry portion, a substantially cylindrical primary portion and a separating portion, whereby the coils in the entry portion, primary portion and separating portion having different slope angle, with the slope angle determined by a combination of a thickness of the screw thread and a root width between two neighboring coils of the screw thread, wherein the increase in height of the coils correlates to the helix line.