Method for making frames for bicycles, motorbikes and...

B - Operations – Transporting – 23 – K

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B23K 1/00 (2006.01) B62K 19/20 (2006.01)

Patent

CA 2183340

A method for making bicycle frames from tubes made of a light non-ferrous material by preassembling the various elements and joining them together by braze welding in a salt bath. The basic tubes (1, 2, 3, 4, 5, 6, 7) are mutually arranged in such a way that a connection is achieved by the end of one tube abutting the peripheral surface of the corresponding element, and/or being partially or completely inserted therein, the weld metal being provided in the contact areas. The supporting element comprises an opening (20) within the connection area so that the salt bath can circulate inside the whole of the frame during the braze welding process.

Procédé de réalisation de cadres de cycles à partir de tubes en matériau léger non ferreux, qui consiste à pré-assembler les différents éléments et à réaliser la liaison des différents éléments entre eux par la technique de soudobrasage au bain de sels. Selon l'invention. les tubes élémentaires (1, 2, 3, 4, 5, 6, 7) sont positionnés les uns par rapport aux autres de telle sorte que la liaison soit réalisée par contant en bout d'un tube contre la surface périphérique de l'élément qui lui est associé et/ou par pénétration totale ou partielle à l'intérieur de ce dernier, le métal d'apport étant interposé au niveau des zones de contact; l'élément servant d'appui comporte un orifice (20) situé à l'intérieur de la zone de jonction permettant la circulation du bain de sels à l'intérieur de la totalité du cadre lors de l'opération de soudobrasage.

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