Tool for the finish forming without chip removal of a preformed thread, method of manufacturing such a tool and method of producing a thread

摘要

The tap has a thread-forming portion that rotates about a tool axis. The portion has multiple forming wedges, where the wedges in cross-section comprise two flanks that diverge from one another beginning at a forming wedge tip (8). The wedge tip is shaped as an acute angle, a rounded region, or a flattened region, where one of the two flanks include an expansion for positioning the wedge in a previously created thread. An independent claim is also included for a method of creating a screw thread in a work piece, in particular an internal thread.