Abstract: A process for manufacturing stiffened structures (11) in composite materials formed by an outer coating (13) and a plurality of stiffeners (15) the cross-section of which has a closed form delimiting an inner opening (23), comprising the following steps: a) Providing a shaping tool (31); b) Providing auxiliary male tools (37) with an inert material inside them coated with membranes suitable for curing c) Providing stiffeners (15) in fresh or cured condition; d) Arranging the stiffeners (15) in the tool (31) and the auxiliary male tools (37) in their inner openings (23); e) Laminating the outer coating (13); f) Curing the stiffened structure (11) with high temperature and pressure; g) Removing the auxiliary male tools (37) after reducing their volume by withdrawing the inert material thereof; h) Separating the cured stiffened structure (11) from the tool (31). The invention also relates to the auxiliary male tools.

Abstract: The invention relates to a process for manufacturing stiffened structures (1) in composite materials formed by an outer skin (2) and a plurality of stiffeners (3) the cross-section of which has a closed shape delimiting an inner opening (6), comprising the following steps: a) providing a shaping jig (34); b) providing auxiliary male jigs (36) with inner cavities (32) reinforced (33) along their length, coated by membranes (37) suitable for curing; c) providing stiffeners (3); d) arranging the stiffeners (3) in the jig (34) and in their inner openings (6) the auxiliary male jigs (36); e) laminating the outer skin (2); f) curing the stiffened structure (1) with high temperature and pressure; g) removing the auxiliary male jigs (36) after reducing their section (41); h) separating the cured stiffened structure (1) from the jig (34), the design of the inner cavities (32) including their reinforcement (33) and the capacity to maintain or reduce their section by the application of overpressure or underpressure resp

Abstract: A process for manufacturing stiffened structures (11) in composite materials formed by an outer coating (13) and a plurality of stiffeners (15) the cross-section of which has a closed form delimiting an inner opening (23), comprising the following steps: a) Providing a shaping tool (31); b) Providing auxiliary male tools (37) with an inert material inside them coated with membranes suitable for curing c) Providing stiffeners (15) in fresh or cured condition; d) Arranging the stiffeners (15) in the tool (31) and the auxiliary male tools (37) in their inner openings (23); e) Laminating the outer coating (13); f) Curing the stiffened structure (11) with high temperature and pressure; g) Removing the auxiliary male tools (37) after reducing their volume by withdrawing the inert material thereof; h) Separating the cured stiffened structure (11) from the tool (31). The invention also relates to the auxiliary male tools.