Method for connecting at least two heat exchanger plates

B - Operations – Transporting – 23 – K

Patent

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Details

B23K 26/28 (2006.01) B23K 26/24 (2006.01) B23K 37/04 (2006.01) F28D 1/03 (2006.01) F28D 9/00 (2006.01)

Patent

CA 2706542

The invention relates to a method for connecting at least two heat exchanger plates so as to form a plate packet for a heat exchanger, said plate packet being provided with at least one passage defined by through holes in the heat exchanger plates. With the aid of this method, the heat exchanger plates are to be braced well to one another so that high- quality welding seams having a high strength can be produced. To this end, the invention suggests that two respective heat exchanger plates should be clamped together in the proximity of the edge of the future through hole, and that the respective heat exchanger plates should be welded to one another in pairs with at least one circumferentially extending welding seam marking the edge of the future through hole, the diameter of at least one circumferentially extending welding seam being at least as large as the diameter of the future through hole, and that the through hole should subsequently be cut out of the heat exchanger plates that have been welded together.

L'invention concerne un procédé permettant d'assembler au moins deux plaques d'échangeur de chaleur afin de former un paquet de plaques pour un échangeur de chaleur, lequel paquet présente au moins un passage constitué par des trous de passage ménagés dans les plaques d'échangeur de chaleur. Selon le procédé, les plaques d'échangeur de chaleur doivent être correctement serrées l'une contre l'autre, de sorte que des cordons de soudure de bonne qualité et de haute résistance puissent être réalisés. Selon l'invention, deux plaques d'échangeur de chaleur sont serrées l'une contre l'autre dans le voisinage du bord du futur trou de passage puis soudées l'une à l'autre par paire par au moins un cordon de soudure périphérique délimitant le bord du futur trou de passage, le diamètre d'au moins un cordon de soudure périphérique étant au moins égal à celui du futur trou de passage, et le trou de passage est ensuite découpé dans les plaques d'échangeur de chaleur soudées l'une à l'autre.

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