A method for joining of warm heat exchanger elements on a plate and the tool from the deformation of the pipe end of an elongated average to a circular cross-section

摘要

The heat-exchange system (10) includes a plurality of tubes (12) of elongate cross-section, the ends of which are shaped so as to have circular cross-sections before being fitted into sealing collars (30) of circular cross-section disposed in respective holes (28) in the end plate (26). The ends of the tubes (24) are shaped in a single step by radial compression from outside and are fitted in the sealing collars without further deformation.