Method of producing a corrugated, multi-ply metal bellows

Details Method of producing a corrugated, multi-ply metal bellows Method of producing a corrugated, multi-ply metal bellows

B - Operations, Transporting

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B21D 15/00 (2006.01) B21D 15/06 (2006.01) B21D 51/12 (2006.01) F16J 3/04 (2006.01)

Patent

CA 1148795

T I T L E A METHOD OF PRODUCING A CORRUGATED, MULTI-PLY METAL BELLOWS I N V E N T O R S Cyril J. Astill Peter Janzen ABSTRACT OF DISCLOSURE A method of producing a multi-ply metal bellows wherein the plies are telescoped together to form a multi- ply tube and annular grooves are inwardly rolled in the multi-ply tube at spaced intervals therealong while the tube is supported internally on either side of the grooves, as they are rolled, and is held against substantial deformation. Crest and root constraining dies are assembled around the multi- ply tube and in the grooves and then the tube is pressurized internally, while the dies are pushed together, so that the undeformed portions of the tube bulge outwardly into the dies. The bellows is then completed by removing the dies and put- ting spacing shims in between the bulged convolution crest portions and then pushing the ends of the tubes until the shims are lightly held between the bulges.

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