Apparatus for transforming the cross-section of a thin-walled cylinder

An arrangement for working the interior cross-section of a thin-walled circular pipe or other cylinder to a symmetrical, non-circular cross-section such as a rectangular or a flat-oval form is described. The pipe to be worked is advanced over and into contact with a conforming mandrel whose outer su...

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Bibliographische Detailangaben
Hauptverfasser:	ZAHARIEV, STEFAN ELENKOV, PEYCHEV, GEORGI VASSILEV, MARKOV, IVAN KIRILOV, PETROV, RADOSLAV STANEV
Format:	Patent
Sprache:	eng
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRANSPORTING WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	An arrangement for working the interior cross-section of a thin-walled circular pipe or other cylinder to a symmetrical, non-circular cross-section such as a rectangular or a flat-oval form is described. The pipe to be worked is advanced over and into contact with a conforming mandrel whose outer surface has a cross-section that corresponds to the internal, initially round cross-section of the pipe. The mandrel is provided with an outer cross-section that varies axially from an input round cross-section corresponding to that of the pipe to an output cross-section that matches the final configuration of the worked pipe, while exhibiting a constant peripheral dimension throughout its length. The mandrel is made freely-rotatable about its axis as the pipe is advanced along and in contact with the mandrel in order to maintain a coaxial configuration of the resulting contoured pipe.