Tool for chipless production or finishing of a thread, method for producing the tool and method for producing a thread

A method for the non-cutting production or reworking of a thread, comprising:

• using a tool for the chipless production or finishing of a thread, in or on a workpiece, comprising:
• rotating at least one shaping region about a tool axis (A) for the chipless production or finishing of the thread, wherein the at least one shaping region comprises a plurality of pressing lobes projecting or protruding radially outwardly from the tool axis (A) for producing or finishing the thread by pressing the plurality of pressing lobes into a surface of the workpiece;
• arranging the pressing lobes successively along a forming curve which substantially spirals around the tool axis (A),
• wherein a pitch of the forming curve corresponds to a pitch of the thread to be produced or reworked, and the forming curve has a helix angle (α);
• designing a profile of at least one pressing lobe of the plurality of pressing lobes such that a thread produced in an axial section containing the tool axis (A) is at least in sections round-arched or ogival;
• and
• scanning the thread with a stylus instrument, wherein the thread has a thread pitch with the helix angle (α), wherein
• the tool comprises two or three or four or five or six or more pressing lobes and/or the pressing lobes are arranged in at least two pressing ridges,
• one of the at least two pressing ridges is a first pressing ridge and another is a second pressing ridge,
• the second pressing ridge is longer along the forming curve than the first pressing ridge, and
• the second pressing ridge has a length of a 1.5-2.5 times swept angle θ than the first pressing ridge.

A method for the non-cutting production or reworking of a thread, comprising:

• using a tool for the chipless production or finishing of a thread in or on a workpiece, comprising:
• rotating at least one shaping region about a tool axis (A) for the chipless production or finishing of the thread, wherein
• the shaping region comprises a plurality of pressing lobes projecting or protruding radially outwardly from the tool axis (A) for producing or finishing the thread by pressing the plurality of pressing lobes into a surface of the workpiece;
• the pressing lobes being arranged successively along a forming curve which substantially spirals around the tool axis (A),
• wherein a pitch of the forming curve corresponds to a pitch of the thread to be produced or reworked, and
• the forming curve has a helix angle (a);
• producing a thread that is at least in sections round-arched or ogival in an axial section containing the tool axis (A);
• and
• scanning the thread with a stylus instrument, wherein the thread has a thread pitch with the helix angle (α) wherein
• the tool comprises two or three or four or five or six or more pressing lobes and/or the pressing lobes are arranged in at least two pressing ridges,
• one of the at least two pressing ridges is a first pressing ridge and another is a second pressing ridge,
• the second pressing ridge is longer along the forming curve than the first pressing ridge, and
• the second pressing ridge has a
• length of a 1.5-2.5 times swept angle θ than the first pressing ridge.