METHOD FOR SECURING TUBES TO TUBE PLATES

plastic metal working, namely fastening tubes in tube plates. SUBSTANCE: method comprises steps of forming annular protrusion on outer surface of tube end; placing tube in tube opening having outer and inner annular grooves; matching annular protrusion of tube with outer annular groove; fixing tube...

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Bibliographische Detailangaben
Hauptverfasser:	KOZIJ S.S, BATRAEV G.A, KOZIJ S.I
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	BLASTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION HEAT EXCHANGE IN GENERAL HEATING LIGHTING MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING WEAPONS WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	plastic metal working, namely fastening tubes in tube plates. SUBSTANCE: method comprises steps of forming annular protrusion on outer surface of tube end; placing tube in tube opening having outer and inner annular grooves; matching annular protrusion of tube with outer annular groove; fixing tube against possible motion for further securing it to tube plate; applying compression effort to inner surface of tube at realizing successive stages of freely introducing said protrusion to annular groove for locally expanding joined parts; at local expanding deforming tube material by bending in zone between annular grooves; then plastically forming tube material in annular protrusion and finally fixing tube in annular grooves due to cross shift of tube material relative to annular protrusion. EFFECT: enhanced strength, closeness and corrosion resistance of tube-to-tube plate joints. 5 dwg