US 12,420,331 B2
Forming method and forming machine for producing a helical toothing of a cylindrical workpiece by extrusion
Max Olaf Jandt, Keltern (DE); Maximilian Ludwig, Maulbronn-Schmie (DE); Nadezda Missal, Schwieberdingen (DE); Serjosha Heinrichs, Oberderdingen (DE); and Sascha Voegele, Kaempfelbach (DE)
Assigned to FELSS Systems GmbH, Koenigsbach-Stein (DE)
Filed by FELSS Systems GmbH, Koenigsbach-Stein (DE)
Filed on May 5, 2023, as Appl. No. 18/143,641.
Claims priority of application No. 22178023 (EP), filed on Jun. 9, 2022.
Prior Publication US 2023/0398598 A1, Dec. 14, 2023
Int. Cl. B21K 1/30 (2006.01); B21C 23/03 (2006.01); B21C 23/18 (2006.01); B21C 25/02 (2006.01); B21C 25/04 (2006.01); B21C 31/00 (2006.01); B21J 5/12 (2006.01)
CPC B21K 1/305 (2013.01) [B21C 23/035 (2013.01); B21C 23/18 (2013.01); B21C 25/02 (2013.01); B21C 25/04 (2013.01); B21C 31/00 (2013.01); B21J 5/12 (2013.01); Y10T 29/49474 (2015.01)] 15 Claims
OG exemplary drawing
 
1. A forming method for producing a helical toothing (21, 24) on a cylindrical workpiece blank (4) by extrusion, the method comprising:
providing a forming machine comprising a rotary drive (9), a machine control (18), and a forming tool (3, 25) having a shaping helical toothing (16, 26),
configuring the forming tool (3, 25) and the workpiece blank (4) as forming partners, wherein one of the forming partners is a rotatable forming partner that rotates in a peripheral direction (7) of the workpiece blank (4), and a drive connection between the rotatable forming partner and the rotary drive (9) can be established and released by the machine control (18) such that the rotatable forming partner can, selectively, be freely rotated or driven to rotate by the rotary drive (9),
moving the forming tool (3, 25) and the workpiece blank (4) relative to one another in an axial direction (6) with an axial forming movement,
producing the helical toothing (21, 24) on the workpiece blank due to the axial forming movement, wherein the forming tool (3, 25) engages, along with the shaping helical toothing (16, 26), in the workpiece blank (4) during the axial forming movement, and
superimposing a relative movement of the forming tool (3, 25) and of the workpiece blank (4) carried out in a peripheral direction (7) of the forming tool (3, 25) and of the workpiece blank (4) on the axial forming movement as a forming movement of the forming tool (3, 25) and of the workpiece blank (4) in the peripheral direction (7), wherein the helical toothing (21, 24) is produced on the workpiece blank (4) due to a forming relative movement of the forming tool (3, 25) and of the workpiece blank (4) resulting from the superimposition of the axial forming movement and the forming movement in the peripheral direction, wherein the forming tool (3, 25) engages, along with the shaping helical toothing (16, 26), in the workpiece blank (4) during the resulting forming relative movement of the forming tool (3, 25) and of the workpiece blank (4).