Method using powder metallurgy to manufacture a dog ring gear

摘要

The invention relates to a method for manufacturing a dog ring gear, each dog being made up of a front portion and a rear portion, the method including the following steps: forming, by means of compression and sintering, a ring gear with dog preforms extending on all or part of the periphery thereof; and calibrating the sintered ring gear in a die including a front die half and a rear die half intended for engaging at the junction between the front and rear portions of the dogs, the thickness (A) of a rear portion (BP) of each preform, in the original plane of the dogs, being greater than the narrowest section (S1) of a groove formed in the rear die half and smaller than the thickest section (S2) of the groove, in the plane.

主权项

1. A method for manufacturing a dog ring, each dog being formed of a front portion (FC) and of a rear portion (BC), the method comprising the steps of:
forming, by compression and by sintering, a ring having dog preforms extending on all or part of its periphery; and calibrating the sintered ring in a die comprising a front half-die and a rear half-die intended to come in contact at the junction between the front and rear portions of the dogs, the thickness (A) of a rear portion (BP) of each preform, in the pitch plane of the dogs, being greater than the narrowest section (S1) of a trench formed in the rear half-die and smaller than the thickest section (S2) of said trench, in said plane.