FIELD: process engineering.
SUBSTANCE: invention relates to heat engineering and metal forming and may be used in making heat exchangers with parallel fins with openings for circulation tubes to pass through. Circulation tubes are mechanically jointed with fins by pressing them in with the help of tool fitted inside tubes to deform their walls and press them against fin openings. Note here that circulation tubes are made from strip billet containing, at least, one basic metal layer. Billet is rolled up into tube to be welded and drawn. Heat exchanger comprises, at least, one tube made as described above.
EFFECT: expanded performances.
11 cl, 1 dwg
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