Method for manufacturing a one-piece annular metal part having a reinforcing insert of composite material

1. A method for manufacturing a one-piece annular metal part incorporating at least one reinforcing insert made from at least one metal-coated fiber of composite material, comprising:

forming a blank of said part by superimposing, around a rotating cylindrical mandrel, layers of metal wire and layers of coated fiber, said layers of coated composite fiber being arranged in the blank according to the positioning of said insert in the part;

placing the blank in a receiving tool;

applying a hot isostatic pressing treatment to the blank; and

extracting the treated blank from the receiving tool and, as required, machining the treated blank to obtain said one-piece annular metal part having a reinforcing insert,

wherein two transverse flanges are arranged on said cylindrical mandrel, spaced in parallel to one another and between which the windings forming the layers of joined turns of metal wire are mounted.

2. The method as claimed in claim 1 , wherein the metal wire and the composite fiber are cold wound at ambient temperature, and the metal wire used is obtained by wire drawing and is made from the same metal as that of the coated fiber.

3. The method as claimed in claim 1 , wherein the metal wire and the composite fiber are wound substantially perpendicular to the axis of the rotating cylindrical mandrel.

4. The method as claimed in claim 1 , wherein the layers of composite fiber are arranged on a partial median area of an extent of the metal wire wound around the cylindrical mandrel.

5. The method as claimed in claim 1 , wherein the at least one layer of metal wires are held together by bonding means, so as to obtain a blank that can be handled until its introduction into said receiving tool.

6. A method for manufacturing a one-piece annular metal part, incorporating at least one reinforcing insert issuing from at least one metal-coated fiber of composite material, comprising:

forming a bland (E) of said part by superimposing, around a rotating cylindrical mandrel, layers of metal wire and layers of coated fiber, said layers of coated composite fiber being arranged in the blank according to the positioning of said insert in the part;

placing the blank in a receiving tool, and applying a hot isostatic pressuring treatment to the blank; and

extracting the treated blank from the receiving tool and, as required, machining the treated blank to obtain said one-piece annular metal part having a reinforcing insert,

wherein two transverse flanges are arranged on said cylindrical mandrel, spaced in parallel to one another and between which the windings forming the layer of joined turns of metal wire are mounted, and

wherein recesses are made in the flanges, for accommodating windings of metal wire, and corresponding to changes in cross section of the annular part to be obtained.

7. A method for manufacturing a one-piece annular metal part, incorporating at least one reinforcing insert issuing from at least one metal-coated fiber of composite material, comprising:

forming a blank of said part by superimposing, around a rotating cylindrical mandrel, layers of metal wire and layers of coated fiber, said layers of coated composite fiber being arranged in the blank according to the positioning of said insert in the part;

placing the blank in a receiving tool, and applying a hot isostatic pressing treatment to the blank; and

extracting the treated blank from the receiving tool and, as required, matching the treated blank to obtain said one-piece annular metal part having a reinforcing inset,

wherein two transverse flanges are arranged on said cylindrical mandrel, spaced in parallel to one another and between which the windings forming the layer of joined tunes of metal wire are mounted, and

wherein pairs of annular flanges are provided, being superimposed on the previously mounted flanges, at each change in cross section of the part to be obtained in accordance with production of the part by the metal wire.

8. The method as claimed in claim 1 , wherein the cylindrical mandrel, the annular flanges and the blank having a metal wire and composite fiber, are incorporated in the receiving tool.

9. The method as claimed in claim 1 , wherein the receiving tool includes a cylindrical open receptacle presenting a receiving volume, and the receptacle is closed by a lid with a shape complementary to an opening of the receptacle and a transverse face of the blank.

10. The method as claimed in claim 9 , wherein the hot isostatic pressing treatment is applied under pressure applied by press plated at an elevated temperature.

11. The method as claimed in claim 9 , wherein the hot isostatic pressing treatment is applied by placing the receiving tool and lid in a bag, placing the bag in an autoclave, and raising a pressure and temperature in the autoclave to deform the bag.