Fixing sealing socket in tube - using several rings made of shape memory alloy which can only bridge over reduced gap width

摘要

Between the socket (4) and the tube (2) several cylindrical rings (5) of shape memory alloy are arranged, which by heating to a predetermined temp. produce a sealed connection between the tube and the socket. For formation of the cylindrical ring (5) an original ring deviating in its geometry from a cylindrical shape is brought of a cylindrical shape by force applied on its inside and outside. The force effect is firstly applied to the inside of the ring and then on the outside. The ring is rolled from its inside and squeezed from its outside. In the essential areas of the cylindrical ring a plastic expansion of at least 8% applies. USE/ADVANTAGE - To fix socket in tube, with large gap width bridged over and leakage-free connection ensured.