Co-cured joint with z-pins

Details Co-cured joint with z-pins Co-cured joint with z-pins

B - Operations, Transporting

29

C

B29C 70/24 (2006.01) B29C 65/00 (2006.01) B29C 65/56 (2006.01)

Patent

CA 2449742

A method is provided for securing a three-dimensional woven preform (11) to a first composite laminate component (15), the preform having a base (17) and a pair of spaced-apart legs extending from the base. The preform (11) may be used to attach a second component (13) or may be used alone to stiffen the first component (15). The preform (11) and the first component (15) are uncured, whereas the second component is cured prior to assembly. The preform is positioned on the first component (15), adhesive (27) optionally being located between the preform and the first component. Z-pins (33) are driven through the base (17) of the preform and into the first component (15), the pins extending into the base and the first component. The second component (13) is attached to the leg of the preform. A vacuum bag and tooling are used while curing the first component (15) and the preform (11) and the preform to the first component. The second component (13) may be bonded or fastened to the preform (11).

L'invention porte sur un procédé de fixation d'une préforme (11) tissée en 3D à un premier composite laminé (15), la préforme présentant une base (17) et une paire de bras espacés partant de la base. La préforme (11), qui peut servir à fixer un second composant (13), peut être utilisée seule pour raidir le premier composant (15). La préforme (11) et le premier composant (15) restent non durcis, alors que le second composant est durci avant l'assemblage. La préforme se place sur le premier composant (15), avec intercalage facultatif d'un adhésif (27) entre la préforme et le premier composant. Des aiguilles en Z (33), introduites dans la base (17) de la préforme et dans le premier composant (15), s'étendent dans la base et dans le premier composant. Le second composant (13) est fixé aux bras de la préforme. On utilise un sac à dépression et de l'outillage pendant le durcissement du premier composant (15) et de la préforme, et de la préforme (11) au premier composant. Le second composant (13) peut être collé ou fixé à la préforme (11).

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