Method for manufacturing an impeller
AssigneeCryostar SAS
InventorAnny Murad-Bickard
Life of this patent
Estimating the term…
Abstract
A method for manufacturing an impeller, in particular, for a turbomachine, said impeller comprising vanes forming channels in the impeller, the method comprising the following steps: a) forming a raw impeller part by means of additive manufacturing; b) removing), from the raw impeller part, at an inner surface of at least one channel, material in a first area and in a second area of the inner surface, by means of post-processing, to obtain an intermediate impeller part; and c) removing, from the intermediate impeller part in the first area, material by means of machining.
Claims15
A method for manufacturing a closed impeller, for a radial turbomachine, said impeller comprising vanes forming channels in the impeller, the method comprising:
- a) forming a raw impeller part by means of additive manufacturing;
- b) removing, from said raw impeller part, at an inner surface of at least one channel, material in a first area and in a second area of said inner surface, by means of post-processing, to obtain an intermediate impeller part, wherein said first area is located closer to an opening of the channel than said second area;
- wherein the post-processing comprises at least one of the following techniques:
- chemical surface treatment, physical surface treatment, mechanical surface treatment, electrical surface treatment, and wherein the surface in the first area and the second area after b) has a roughness Ra1 from 3 to 10 μm;
- and
- c) removing, material from said intermediate impeller part in said first area, material by means of machining, wherein the second area is only treated with step-b), and wherein the surface in the first area after c) has a roughness Ra2, which is smaller than Ra1.
Dependencies are inferred from the claim text.