US 12,420,331 B2Granted

Forming method and forming machine for producing a helical toothing of a cylindrical workpiece by extrusion

AssigneeFELSS Systems GmbH

InventorsMax Olaf Jandt, Maximilian Ludwig, Nadezda Missal, Serjosha Heinrichs, Sascha Voegele

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Abstract

In the context of a forming method for producing a helical toothing of a cylindrical workpiece by extrusion, a relative movement of a forming tool and of a workpiece blank carried out in a peripheral direction of the forming tool and of the workpiece blank is superimposed on an axial forming movement of the forming tool and of the workpiece blank. Due to a forming relative movement of the forming tool and of the workpiece blank resulting from the mutual superimposition of the axial forming movement and the forming movement in the peripheral direction, the helical toothing of the workpiece is produced on the workpiece blank, in that the forming tool engages, with a shaping helical toothing, in the workpiece blank during the resulting forming relative movement. A forming machine is designed to carry out the aforementioned method.

Claims15

Dependent claims

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).

2 more elements

A forming system for producing a helical toothing by extrusion, comprising:

a cylindrical workpiece blank (4) and a forming machine (1) comprising:
a forming tool (3, 25) having a shaping helical toothing (16, 26),
a feed drive (8) configured to move the forming tool (3, 25) and the cylindrical workpiece blank (4) relative to one another in an axial direction (6) with an axial forming movement, wherein the helical toothing (21, 24) of the workpiece is able to be produced on the workpiece blank (4) 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
a rotary drive (9) configured to move the forming tool (3, 25) and the workpiece blank (4) relative to one another in a peripheral direction (7) of the forming tool (3, 25) and of the workpiece blank (4), with thereby providing a forming movement in the peripheral direction (7), and
a machine control (18) configured to control the feed drive (8) and the rotary drive (9),
wherein the machine control (18) is configured to control the feed drive (8) and the rotary drive (9) in such a way that the forming movement of the forming tool (3, 25) and of the workpiece blank (4) in the peripheral direction (7) is superimposed on the axial forming movement, wherein the helical toothing (21, 24) is able to be 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 (7), 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), and
wherein the forming tool (3, 25) and the workpiece blank (4) are configured as forming partners, 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).

4 more elements

Dependencies are inferred from the claim text.