TOOL FOR THE CHIPLESS PRODUCTION OR FINISHING OF A THREAD ON A WORKPIECE, IN PARTICULAR COLD-FORMING TAP OR THREAD-FORMING TAP.

摘要

The invention relates to a tool (1) for the chipless production or finishing of a thread in or on a workpiece, in particular a cold-forming tap or thread-forming tap, comprising at least one forming region (5), which is rotatable or rotates about a tool axis (A), for the chipless production or finishing of the thread, in particular of an internal thread, wherein the forming region (5) has a plurality of pressure studs (7, 7a, 7b, 7c), which protrude or project radially towards the outside from the tool axis (A), for producing or finishing the thread by pressing the pressure studs (7, 7a, 7b, 7c) into the workpiece surface, wherein the pressure studs (7, 7a, 7b, 7c) are arranged in succession along a shaping curve (6) that encircles the tool axis (A) in a substantially spiral manner, and wherein the pitch of the shaping curve (6) corresponds substantially to the pitch of the thread to be produced or finished. The invention is characterized in that the pitch angle (t1) between a first of the pressure studs (7a) and a second pressure stud (7b) that follows said first pressure stud (7a) along the shaping curve (6) differs from the pitch angle (t2) between the second pressure stud (7b) and a third pressure stud (7c) that follows the second pressure stud (7b) along the shaping curve (6).