FIELD: plastic metal working, possibly manufacture of heat exchange apparatuses. SUBSTANCE: apparatus for joining tubes with tube plates includes stem and flat zone with working portion. Portion for preliminarily expanding tube is in the form of truncated cone whose large base is joined with working portion. Apparatus includes axle supporting roller with possibility of rotation. Flat zone with working portion has lengthwise groove in which axle with roller is mounted with possibility of motion along axis of apparatus. Portion for preliminarily expanding tube has at least two flats arranged along its perimeter and along its whole height. Radial ball bearing is used as roller. EFFECT: high quality of tube-to-tube plate joint, elimination of stability loss of tubes. 3 cl, 5 dwg
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