TUBE BENDING APPARATUS AND METHOD

摘要

A heat exchanger is disclosed, which comprises: a plurality of tubes each having a U-shaped portion and arranged in a plurality of parallel bending planes, each bending plane containing a plurality of tubes of the same nominal outer diameter and of differing bending radius, the variation of the outer diameter of the tubes in at least one of the bending planes measured in a direction perpendicular to the bending planes being at most 0.1 mm; and an antivibration bar disposed between two of the bending planes.