Method and apparatus for the production of pieces of connection without welding, subjected to large forces and connection pieces applied by said other

摘要

The invention relates to a device for the formation of the connection pieces by deformation of a hollow cylindrical body. / p & & p & the apparatus comprises a door - tool 3 and a longitudinally movable support 4, an annular body 14 is mounted around the door - tool and resting on rollers 5, said tubular body having a profile inside 7 in the form of spherical bead circumferentially, a punch 8 disposed on the door - tool 3 and a drive system 10 for the door - tool 3 and the rollers 5. Application in particular to the embodiment of the envelopes of heat exchangers.