BLANK CASTING FOR PRODUCING A TURBINE ENGINE ROTOR BLADE AND PROCESS FOR MANUFACTURING THE ROTOR BLADE FROM THIS BLANK

摘要

The invention relates to a blank casting for producing a turbine engine rotor blade, with a vane connected by a platform (4′) to a root (2′), said root having an axial machining allowance intended to be removed by machining from each of its axial extremities, characterised in that at least one of the axial extremities of the root (2′) comprises at least one transverse channel (14′) that extends over the entire transverse width of the root and whose depth is greater than said machining allowance. The invention also relates to the process for obtaining the blade by machining this blank casting.

主权项

1. Blank casting with a vane connected via a platform to a root, for producing a blade of a turbine engine rotor that has a vane connected via a platform to a root intended to be inserted in the rotor following the direction of the axis of the rotor, this axis defining an axial direction and a radial direction for the components of the blade with reference to the position of the blade on the rotor, at least one of the axial extremities of the blade root having to follow an approximately transverse plane of contact in order to provide a seal by pressure against a component of the turbine engine, said root of the blank having an axial machining allowance intended to be removed by machining from each of its axial extremities, characterised in that the axial extremity of the root of the blank corresponding to the axial extremity of the root of the blade that has to follow said plane of contact comprises at least one transverse channel which extends over the entire width or transverse dimension of the root and whose depth is greater than the value of the machining allowance relative to the position of said plane of contact, so as to improve the precision of machining on the face or faces of the blade root in the plane of contact.