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FR2652015A1 Expired / Lapsed FR ⏱️ 0.0 years remaining

METHOD AND APPARATUS FOR EXPANSION OF TUBES.

Assignee: Caterpillar Inc
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Filing: 1990-08-30
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Granted: —
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Expires: 2010-08-30
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Abstract

Abstract Translated from French L'appareil servant à dilater un tube comporte une multiplicité de segments (16) radialement mobiles, dont chacun est doté d'une paire de surfaces (28,30) de contact avec la pièce à travailler circonférentiellement décalées et longitudinalement espacées, disposées sur le segment. Avantageusement, le procédé et l'appareil permettent de dilater le tube d'un degré suffisant pour former un joint mécanique ferme avec une bride ou un élément de paroi, quelles que soient les variations nominales du diamètre et de l'épaisseur de la paroi du tube. En outre, le procédé et l'appareil permettent de former un fini uniformément lisse sur la surface interne du tube rendant ainsi inutiles des traitements de post-formage pour éliminer des particules superficielles indésirables. The apparatus for expanding a tube has a multiplicity of radially movable segments (16), each of which is provided with a pair of circumferentially offset and longitudinally spaced workpiece contact surfaces (28,30) disposed on the body. segment. Advantageously, the method and apparatus allow the tube to be expanded by a sufficient degree to form a firm mechanical seal with a flange or wall member, regardless of the nominal variations in the diameter and thickness of the wall of the tube. tube. Further, the method and apparatus allows a uniformly smooth finish to be formed on the inner surface of the tube thereby eliminating post-forming treatments to remove unwanted surface particles.

Inventors

  • 👤 M L Caudill

Bibliographic Details

Application Number —
Jurisdiction FR
Data Source google_patents
Last Synchronized 2026-11-07 23:16
CPC Classifications
B; B21; B21D; B21D41/00; B21D41/02; B21D39/00; B21D39/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/4994

Claims Analysis

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References Cited (Backward Citations)

US2357123A Cited
FR1476822A Cited
US4262518A Cited
US4597282A Cited
EP0284773A2 Cited

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