EP0397570B1 - Appareil destiné à élargir ou évaser les extrémités des tubes - Google Patents

Appareil destiné à élargir ou évaser les extrémités des tubes Download PDF

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Publication number
EP0397570B1
EP0397570B1 EP19900401241 EP90401241A EP0397570B1 EP 0397570 B1 EP0397570 B1 EP 0397570B1 EP 19900401241 EP19900401241 EP 19900401241 EP 90401241 A EP90401241 A EP 90401241A EP 0397570 B1 EP0397570 B1 EP 0397570B1
Authority
EP
European Patent Office
Prior art keywords
mandrel
link
appliance
movable handle
handle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19900401241
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0397570A1 (fr
Inventor
Jean Marie Tandart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Virax SA
Original Assignee
Virax SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Virax SA filed Critical Virax SA
Publication of EP0397570A1 publication Critical patent/EP0397570A1/fr
Application granted granted Critical
Publication of EP0397570B1 publication Critical patent/EP0397570B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging
    • B21D41/026—Enlarging by means of mandrels

Definitions

  • the present invention relates to an apparatus for widening or flaring the ends of tubes or the like, comprising a movable handle and a fixed handle integral with a body through which a mandrel passes, which under the action of an external force applied to the sleeves moves axially and forces radially apart from each other the expandable jaws grouped in a clearance which, with the threaded ring holding them against the body of the device, constitutes an interchangeable expansion tool.
  • Patent US-A-2,999,529 of September 12, 1961 and FR-A-1,581,127 of July 25, 1968 relate to apparatus of this type, but in the latter, it is an eccentric or a cam integral with the movable lever which pushes the mandrel in the axis of the set of jaws by applying on the face opposite to its conical end the force resulting from the action of the operator.
  • a return means in the rest position which is either a spring or an elastic ring mounted tightening on the outer circumference of the jaw set.
  • the document EP-A-0252.868 describes an apparatus according to the preamble of claim 1 intended to widen or flare the ends of tubes or the like by spacing the jaws of an expansion tool mounted on a body integral with a fixed handle, said apparatus comprising a mandrel which slides along its axis in the body, and the conical end of which is designed to engage between the jaws under the action of a movable handle articulated on the one hand directly on the body and on the other hand to the mandrel via a link, the latter being articulated on one side at movable handle and on the side opposite the mandrel.
  • This arrangement makes it possible to apply a significant extraction force to the mandrel by spreading the sleeves of the device. However, it results in exerting forces on the mandrel which are not constantly directed along its axis.
  • the present invention aims to provide an apparatus of the same kind, but in which it is possible for the operator to exert on the mandrel only forces parallel to its axis.
  • the invention provides an apparatus intended to widen or flare the ends of tubes or the like by spacing the jaws of an expansion tool mounted on a body integral with a fixed handle, said apparatus comprising a mandrel which slides along its axis in the body, and the conical end of which is designed to engage between the jaws under the action of a movable handle, connected by a hinge device comprising a link, on the one hand to the body and on the other hand to the mandrel, this apparatus having the particularity that the movable handle is articulated directly on the mandrel by an axis, and connected to the body by means of the link, which is articulated to the movable handle by an axis and to the body by another axis offset from the axis of the mandrel.
  • the apparatus intended to widen the ends of the tubes or the like shown in FIG. 1, comprises a body 1, an expansion tool with jaws 12, a mandrel 2, a rod 3 and two sleeves, one of which is movable 4 is articulated directly on the mandrel while being retained close to the body by the link which consists of one or more sheet thicknesses.
  • the body and the fixed handle 7 which carries it have a plane of symmetry which must coincide with that of the movable handle and its front groove 5.
  • the support provided by the flanks of the link at the level of the groove acting as yoke is reinforced by the guide resulting from the insertion of the shank 6 of the mandrel in this same groove, because the flat shape obtained by double milling of said shank is adjusted to the width of the yoke.
  • the diameter of the base circumference of the conical end 8 of the mandrel being greater than that of the cylindrical part sliding in the body 1, said conical part cannot enter the bore of said body beyond the marking shoulder 9 the bottom of the chamber 10.
  • the mandrel is immobilized against this stop, its conical end is no longer in contact with the jaws of the tool which are therefore gathered against each other under the action of the spring 11.
  • the transition from this position to that shown in FIG. 1 is only an approach phase preceding the expansion phase of the jaws.
  • the link 3 which pivots about an axis 13 secured to the body of the device provides the movable handle with a point d pressing on said body such that the multiplication ratio of the force supplied by the operator increases as this movable handle approaches the fixed handle.
  • the link 3 whose articulation axes 13 and 14 are identical to that 15 of the tail of the mandrel on the movable handle, has a recess 16 which gives it a specific arched shape leaving free a sufficient space for the tail 6 of the mandrel not to strike said link when the movable handle approaches the fixed handle.
  • the length T of the lever arm existing between the articulation center 14 of the link on the movable arm and the extension of the axis A of the mandrel 2 decreases progressively until it is equal to a third of the distance X, or four millimeters when the handle 17 of the movable handle comes to touch that of the fixed handle 18.
  • This device which can receive most of the tools currently available in specialized shops, allows for the sockets necessary for connecting annealed copper tubes that are encountered in sanitary installations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Manipulator (AREA)
  • Surgical Instruments (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
EP19900401241 1989-05-12 1990-05-10 Appareil destiné à élargir ou évaser les extrémités des tubes Expired - Lifetime EP0397570B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8906448A FR2646792A1 (fr) 1989-05-12 1989-05-12 Appareil destine a elargir ou evaser les extremites des tubes
FR8906448 1989-05-12

Publications (2)

Publication Number Publication Date
EP0397570A1 EP0397570A1 (fr) 1990-11-14
EP0397570B1 true EP0397570B1 (fr) 1994-07-27

Family

ID=9381730

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900401241 Expired - Lifetime EP0397570B1 (fr) 1989-05-12 1990-05-10 Appareil destiné à élargir ou évaser les extrémités des tubes

Country Status (3)

Country Link
EP (1) EP0397570B1 (enrdf_load_stackoverflow)
DE (1) DE69010980T2 (enrdf_load_stackoverflow)
FR (1) FR2646792A1 (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2809651B1 (fr) * 2000-05-30 2002-09-13 Alphacan Sa Pince a emboiture
ES2211842T3 (es) 2002-06-06 2004-07-16 Rothenberger Aktiengesellschaft Util manuel en forma de tenazas para ensanchar cuerpos huecos.
US8517715B2 (en) 2010-04-06 2013-08-27 Milwaukee Electric Tool Corporation PEX expanding tool
US9914260B2 (en) 2014-06-20 2018-03-13 Milwaukee Electric Tool Corporation PEX expanding tool
US9862137B2 (en) 2015-04-20 2018-01-09 Milwaukee Electric Tool Corporation PEX expanding tool
WO2016201196A1 (en) 2015-06-10 2016-12-15 Milwaukee Electric Tool Corporation Pex expanding tool
CN106142527B (zh) * 2016-07-27 2019-02-15 广东联塑科技实业有限公司 一种可显示并限定扩管量的扩管器
EP3698941B1 (en) 2019-02-20 2025-06-25 Milwaukee Electric Tool Corporation Pex expansion tool
US11633775B2 (en) 2019-02-20 2023-04-25 Milwaukee Electric Tool Corporation PEX expansion tool
CN214726466U (zh) 2020-11-27 2021-11-16 米沃奇电动工具公司 扩展工具
CN112828172A (zh) * 2021-01-19 2021-05-25 大连长丰实业总公司 一种液压导管扩口机
WO2022217092A1 (en) 2021-04-09 2022-10-13 Milwaukee Electric Tool Corporation Expansion tool

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000364A1 (en) * 1979-07-30 1981-02-19 Rast Patent Mfg Ltd Tube expanding tool
US4735078A (en) * 1986-07-07 1988-04-05 Emerson Electric Co. Tube expanding tool
DE3732628C1 (de) * 1987-09-28 1989-04-27 Rothenberger Werkzeuge Masch Aufweitewerkzeug fuer hohle Werkstuecke

Also Published As

Publication number Publication date
FR2646792A1 (fr) 1990-11-16
EP0397570A1 (fr) 1990-11-14
DE69010980T2 (de) 1995-02-23
FR2646792B1 (enrdf_load_stackoverflow) 1995-02-24
DE69010980D1 (de) 1994-09-01

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