Structural connecting rod made of a composite and process...

B - Operations – Transporting – 29 – C

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B29C 65/00 (2006.01) B29C 65/02 (2006.01) B29C 65/48 (2006.01) B29C 65/56 (2006.01) B29C 70/30 (2006.01) F16C 3/02 (2006.01) F16C 7/00 (2006.01)

Patent

CA 2692294

A connecting rod (2) is composed of two or more assembled shells (3a, 3b) made of a composite, open over the entire length of the connecting rod. The shells incorporate clevis joints (231a, 231b, 232a, 232b) for introducing stress at each of their ends. The shells are produced separately then assembled together to form a sealed section. Each shell is made from a material preimpregnated with long fibres. The production of each shell is simplified due to the overall shape of the shell as a simple curve, thus a shell may be produced industrially, for example, by thermoforming a flat composite preform. The two shells are assembled by simultaneous polymerization of the shells, by bonding, by welding, by riveting or any other assembly process or combination of assembly processes that are compatible with one another. The structural composite connecting rod obtained has very good mechanical properties, especially in compression, with a simple and economic production process.

Une bielle (2) est composée en deux ou plusieurs coquilles (3a, 3b) en composite, ouvertes sur toute la longueur de la bielle, assemblées. Les coquilles intègrent des chapes (231a, 231b, 232a, 232b) d'introduction d'effort à chacune de leur extrémité. Les coquilles sont réalisées séparément puis assemblées entre elles pour former une section fermée. Chaque coquille est réalisée en matériau préimprégné fibres longues. La réalisation de chaque coquille est simplifiée du fait de la forme globalement en simple courbure de la coquille, ainsi une coquille peut être réalisée de manière industrielle par exemple par thermoformage d'une préforme composite plane. Les deux coquilles sont assemblées par polymérisation simultanée des coquilles, par collage, par soudage, par rivetage ou tout autre procédé d'assemblage ou association de procédés d'assemblage compatibles entre eux. La bielle composite structurale obtenue présente de très bonnes caractéristiques mécaniques, notamment en compression, avec un procédé de réalisation simple et économique.

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