Multipurpose electrical discharge machining tool for a ring sector

摘要

An electrical discharge machining tool of a ring sector for an aircraft turbomachine is provided. The ring sector includes an abradable member and a support element to which the abradable member is fixed; and one or more gripping holes opening on a radially outer surface of a central body of the support element. The machining tool includes at least two machining sets chosen from groove, notch, opening, length-cutting, or abradable element electro-machining sets. The machining tool also has a gripping device for the ring sector by the gripping holes. The gripping device is configured to move the ring sector from one of the electro-machining sets to another of the electro-machining sets.

主权项

1. An electrical discharge machining tool configured to manufacture a ring sector of a turbine for an aircraft turbomachine, the machining tool comprising:
a frame intended to be immersed into a dielectric bath, and a gripping device configured to grip the ring sector to be machined, wherein the gripping device is configured to grip the ring sector to be machined via gripping holes of the ring sector to be machined, wherein the frame comprises at least two of the electro-machining sets of the ring sector to be machined, from the following sets: a length-cutting electro-machine set, configured to correct the circumferential length of the ring sector, an abradable element electro-machining set, configured to machine an abradable element of the ring sector, a groove electro-machining set, configured to machine a groove arranged on a circumferential edge of the ring sector, the groove being configured to accommodate at least one inter-sector sealing tab, a notch electro-machining set, configured to machine a notch located on a downstream rim of a downstream end of a ring sector, the downstream end having the shape of a U opened radially outwards, and an opening electro-machining set, configured to machine an opening provided in an upstream end of the ring sector, the upstream end having a C-shaped cross-section the opening of which opens into the upstream part of the ring sector, and wherein the gripping device is movable in relation to the frame in order to move the ring sector to be machined from one of the electro-machining sets to another of the electro-machining sets.