Patent ID: 9149855
Filing Date: 2015-10-06
Classification: B21D,B21J,B21K,B60B,F16D

Abstract:
1. An apparatus for forming, by means of plastic deformation, a frontal toothing on an inner ring of a wheel hub, the apparatus comprising: a substantially rigid plate delimited by first and second faces, opposite to each other, a plurality of through seats disposed in an axial direction being disposed between the faces of the plate and arranged as a circular crown about an axis of symmetry (A), perpendicular to which each seat has a transversal circular section shaped as a circular crown segment; and a plurality of knives carried by the plate, each axially slidingly guided into a respective seat of the plurality of through seats, wherein the sliding of each knife is independent of the sliding of the other knives; and wherein each knife comprises a head which protrudes from the seat from the side of the first face, a prismatic body having an axial length greater than that of the seat, and a wedge-shaped end, opposite to the head, which protrudes from the second face when the head substantially abuts against the first face; and wherein the wedge shaped ends are arranged in the circular crown pattern about the axis of symmetry (A), each longitudinal direction of the wedge shaped ends extending radially from the axis of symmetry (A), and wherein the second face being adapted to rest in use substantially abutting against the inner ring of the wheel hub; and wherein the wedge-shaped ends of the knives are circumferentially adjacent and circumferentially have a first profile, complementary to that of the frontal toothing to be formed, so that when each knife is pressed against the inner ring, the knife is adapted to form the profile of the side of two adjacent teeth of the frontal toothing to be obtained on the inner ring.