US 11,806,943 B2
Apparatus and method for forming a front toothing on an inner ring of a wheel hub and associated front toothing
Davide Antonio Olivieri, Turin (IT); Laura Sguotti, Bricherasio (IT); Fulvio Carlo Nicastri, Garzigliana (IT); Enrico Luigi Morello, Roletto Turin (IT); and Luca Biancone, Turin (IT)
Assigned to AKTIEBOLAGET SKF
Filed by AKTIEBOLAGET SKF, Gothenburg (SE)
Filed on Oct. 7, 2021, as Appl. No. 17/495,954.
Claims priority of application No. 102020000024166 (IT), filed on Oct. 14, 2020.
Prior Publication US 2022/0111603 A1, Apr. 14, 2022
Int. Cl. B21D 53/10 (2006.01); B29C 67/00 (2017.01); B29L 31/04 (2006.01)
CPC B29C 67/0029 (2013.01) [B29L 2031/04 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An apparatus for forming by plastic deformation a front toothing on an inner ring of a wheel hub, in which the inner ring is provided at one end with an annular collar; the apparatus comprising:
a plate support having an axis of symmetry (B) and a base configured to support the wheel hub coaxial with the axis of symmetry (B) of the plate support, the plate support being axially mobile relatively to the base so as to cooperate in use, frontally, with the annular collar;
a plurality of first and second blade-shaped pressing elements arranged in a crown symmetrically around the axis of symmetry (B) so that a first end of each first pressing element facing towards the base cooperates frontally in contact with a second end of a corresponding second pressing element facing opposite the base;
a first plate which supports axially passing through the first pressing elements;
a second plate coupled frontally to the first plate and axially bound to it, the second plate supporting axially passing through the second pressing elements, the second plate being arranged on the side of the base and the first and second plate being supported by the plate support;
the second pressing elements being slidingly housed in respective first axial slits obtained radially in the crown through the second plate, circumferentially spaced between each other, and being each provided, on the side opposite to the second ends and towards the base, of an engraving head circumferentially wider than the first slits, configured so that the engraving heads of the second pressing elements cooperate circumferentially without play in contact with each other and in a sliding way.