US 11,806,775 B2
Method for forming a front toothing on an inner ring of a wheel hub and associated equipment
Laura Sguotti, Bricherasio (IT); Stefano Galfre, Pinerolo (IT); and Davide Antonio Olivieri, Turin (IT)
Assigned to AKTIEBOLAGET SKF
Filed by AKTIEBOLAGET SKF, Gothenburg (SE)
Filed on Apr. 4, 2022, as Appl. No. 17/712,257.
Claims priority of application No. 102021000008984 (IT), filed on Apr. 12, 2021.
Prior Publication US 2022/0324011 A1, Oct. 13, 2022
Int. Cl. B23P 17/00 (2006.01); B21D 53/10 (2006.01); F16C 19/18 (2006.01)
CPC B21D 53/10 (2013.01) [F16C 19/183 (2013.01); F16C 2326/02 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for forming a front toothing, the front toothing comprising a plurality of radial teeth on an inner ring of a wheel hub, wherein the inner ring is provided with an annular collar at a first end of the inner ring, the annular collar having a predetermined radial profile, the method comprising:
axially and sequentially impressing upon the annular collar a first predetermined circumferential profile, using a plurality of first knives arranged annularly and symmetrically about an axis of symmetry (A) and facing towards the annular collar with a plurality of respective first forming ends defining the first predetermined circumferential profile including a plurality of ridges forming radial teeth of the front toothing, thereby forming annularly on the annular collar a plurality of radial imprints alternating circumferentially with a plurality of radial reliefs, wherein the radial reliefs have a rounded circumferential profile corresponding to a profile of the ridges of the radial teeth; and
axially and sequentially impressing on the annular collar a plurality of second knives, arranged annularly and symmetrically about the axis (A) and facing towards the annular collar with a plurality of respective second forming ends having a second predetermined circumferential profile, the second predetermined circumferential profile configured to reproduce in reverse a plurality of respective opposite flanks of the radial teeth of the front toothing, wherein the second knives are impressed inside a plurality of radial imprints formed by the plurality of first knives until the front toothing is formed,
wherein the plurality of first knives are guided axially and slidably parallel to the axis (A), and
wherein the plurality of second knives are guided axially and slidably parallel to the axis (A).