WO1988000503A1 - Ameliorations apportees a des expanseurs de tubes - Google Patents

Ameliorations apportees a des expanseurs de tubes Download PDF

Info

Publication number
WO1988000503A1
WO1988000503A1 PCT/AU1987/000219 AU8700219W WO8800503A1 WO 1988000503 A1 WO1988000503 A1 WO 1988000503A1 AU 8700219 W AU8700219 W AU 8700219W WO 8800503 A1 WO8800503 A1 WO 8800503A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
cam
tool body
mandrel
lever arm
Prior art date
Application number
PCT/AU1987/000219
Other languages
English (en)
Inventor
Heather Joan Lind
Original Assignee
Heather Joan Lind
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 Heather Joan Lind filed Critical Heather Joan Lind
Priority to GB8807140A priority Critical patent/GB2203078B/en
Publication of WO1988000503A1 publication Critical patent/WO1988000503A1/fr
Priority to SE8800986A priority patent/SE8800986D0/xx

Links

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

  • This invention relates to improvements in and to tools for expanding the ends of tubes/pipes, and in particular it relates to tube expanders of the type in which a plurality of jaw elements are carried in a jaw mount to be expandable by a tapered mandrel actuated by a cam connected with a pivoted handle carried on the tool body which also has a fixed handle extending therefrom, the arrangement being such that by manipulation of the pivoted handle, the mandrel is moved axially into and out of the jaw elements to expand the jaw elements, which have a complementary inner face, to in turn expand a tube end fitted over the jaw elements.
  • Tube expanders of the aforementioned type are well known and in this regard reference is made to Australian Patent Specification numbers 501,090 and 515,159.
  • a further problem with prior art devices is the requirement for fine tolerances during the manufacture of the tool, specifically the mandrel, the cam handle and the body. Furthermore, owing to wear, not infrequently the cam handle and/or the mandrel need replacement.
  • One object of the present invention is to provide an improved tube expander tool which is able to give very accurate adjustment of the expansion of the jaws.
  • a further object is to provide a satisfactory type of cam on the movable handle and anti-f iction assembly between the cam on the handle and the mandrel which will ensure that the force required to move the mandrel forward is minimised.
  • a still further object of this invention is to provide a tube expander, the manfacture of which is very much simplified and eliminates the need to maintain close tolerances in the production of the tool body.
  • Yet another object of this invention is to provide a tube expander which will enable wear to be adjusted out, and which has simple, inexpensive replacement parts rather than having to replace main component parts of the tool through wear.
  • a tube expander is provided with an adjustable tool head between the tool body and the jaw mount, the head being movable axially in relation to the tool body and is axially aligned with both the mandrel and the jaw mount.
  • the invention is directed to an improvement in a tool for expanding pipe or tube ends of the type comprising a tool body having a passageway provided therein, an axially movable mandrel located in the passageway and having a tapered end, jaw mounting means arranged to be coupled with respect to the tool body and comprising a plurality of expandable jaw elements which are mounted for radial displacement upon axial movement of the mandrel, the tool body having a fixed handle projecting therefrom and a pivotal lever arm carried thereon, the pivotal lever arm being provided with a cam at or near its pivoted end, the arrangement being such that by manipulation of the lever arm, the cam co-acts with the mandrel to cause the mandrel to move axially into and out of the jaw elements to thereby expand same and to in turn expand a- tube end fitted over the jaw elements, the improvement comprising an adjustable tool head having a central opening extending therethrough and attachable to the tool body to be co- axially aligned with and
  • the adjustable tool head can be axially moved when the lock screw or similar device is released, the exact amount of expansion can be controlled by simply axially moving the head and then locking it when at the required extension which of course then governs the amount of expansion of the jaws, as the taper on the end of the mandrel engages the inner faces of the jaws. Furthermore, the use of an adjustable head greatly simplifies the manufacture of the tool in that the need for fine tolerances in the production of the tool body, cam handle and mandrel, is removed.
  • the tool head comprises an axial hollow tail which engages neatly into the passageway in the body, the tail being adapted to be locked against axial movement when a selected position for the head has been reached by means of a lock screw or the like, any form of locking being suitable to prevent axial movement when required.
  • the tail is preferably externally screw- threaded and threadably engages an internal screw thread in the passageway of the tool body.
  • the tail and the passageway in the tool body can be splined or otherwise arranged to prevent rotation of the head in relation to the body if this is required 5 or where the body is made of a softer metal the aperture can be sleeved so that the sleeve engages the tail on the head.
  • the tool head preferably has a circular recess in the surface facing the end of the tool body, and the 10 body has an annular depending lip to engage into the recess so that there is a barrier to the ingress of foreign matter to the interengaging surfaces between the tail and the body.
  • the head has a screw-threaded portion 15 engageable with the jaw mount in which the jaw elements of the jaw assembly are housed and the jaw elements are locked to the jaw mount to prevent axial movement in relation thereto but are free to move radially to allow the jaws t be expanded.
  • FIG. 1 is a perspective view of a tube expander 25. showing an expanding jaw assembly attached thereto;
  • FIG. 2 is a exploded perspective view of the tool holder shown in Fig. 1;
  • FIG. 3 is a part longitudinal sectional view of the tube expander of this invention (the closed 30 position of the pivoted lever arm being shown in dotted lines).
  • a tube expander assembly 10 comprises a tool body 11 formed with an axial passageway 12 extending therethrough, an adjustable tool head 13 35 coaxially aligned with the tool body 11, the tool head 13 having an axial bore 16 extending therethrough, a mandrel 17 axially displaceable in the bore 16, and an expandable jaw assembly 18 carried on the lower end of the tool head 13 coaxially therewith.
  • the expanding jaw assembly 18 operates in accordance with known art and does not form any part of the present invention.
  • the tool body 11 is provided with a fixed laterally projecting handle 20 which is provided at its end with a handle grip 21.
  • the upper end of the tool body 11 is formed to have a pair of upwardly projecting spaced apart lugs 22 between which a pivotal lever arm 25 is mounted by means of a transverse pivot pin 26 which passes through the lever arm 25 and the lugs 22.
  • the lever arm 25 can be swung in the direction of arrow 27 shown in Fig. 3 from an open position shown in full lines through to a closed position shown in dotted lines in which the lever arm 25 is approximately parallelly aligned with the fixed handle 20.
  • the lever arm 25 is provided with a cam 28 at its inner end, the cam 28 having an arcuate-shaped peripheral cam surface 30, the cam 28 joining the lever arm 25 through a pair of opposed shoulders 31.
  • a hardened spring steel cam facing 32 clips on to the cam 28 and engages the peripheral surface 30.
  • the clip 32 comprises an arcuate-shaped portion which terminates at its ends in inturned flanges 35 whereby the clip 32 is able to be readily removed and replaced through resilient engagement with the cam 28.
  • the upper end of the mandrel 17 is provided with an enlarged head 36, whilst the lower end of the mandrel 17 comprises a tapered portion 37 which extends through the tool head 13 and into the jaw assembly 18.
  • the pivot pin 26 is mounted eccentrically in relation to the cam surface 30, upon actuation of the lever arm 25, the tapered mandrel 17 is axially displaced and moves into the jaw assembly 18.
  • the enlarged head 36 of the mandrel 17 is provided with a transverse 5 recess 39 in which is located an antifriction roller 40 which is arranged to engage the cam facing 32 to reduce friction during the time that the cam facing 32 is in engagement with the mandrel 17 to move it axially into the jaw assembly 18.
  • the tool head 13 in this embodiment, comprises a small diameter axially inwardly projecting tail 41 which has an externally screw threaded portion 44 which threadably engages the internally threaded passageway 12 of the tool body 11, and a large diameter externally
  • a lock screw 52 which threadably engages in a radial aperture 54 formed in the wall of the body 11, the lock screw 52 when in its locked condition, engages against an unthreaded portion of the tail 41 adjacent its inner end.
  • Construction of the jaw assembly 18 is in accord with known art and comprises a self-contained set of radially expandable jaw elements 55 which are mounted in the circular collar or sleeve 47 in such a way that the segments can radially expand but are constrained against any axial movement.
  • the jaw elements 55 are shaped so as to form a conical recess into which the tapered end of the mandrel 17 engages in order to effect the expansion of the jaw elements 55.
  • the pivotal lever arm 25 is formed of cast aluminium which contrasts with prior art devices wherein the movable handle is normally of hardened steel material.
  • the replaceable hardened steel cam facing clip 32 can be readily removed and replaced in the event of any wear - instead of the entire lever arm as is required in prior art units.
  • the antifriction roller preferably of hardened steel, significantly reduces friction between the clip 32 and the mandrel 17 and thereby minimises wear between the parts, but still further the antifriction roller permits the device to be more readily actuated.
  • the jaw assembly of course can be variable in dimension and for instance, the depth of the jaws can be changed to allow the device to be used in tubes of difference diameters and at the same time the actual expansion of such tubes is variable by loosening the lock screw or similar device and positioning the tool head axially in relation to the tool body to select the required limit to which the jaws can be expanded. It will be realised from the foregoing that a simple and effective form of tube expander is provided and one which incorporates significant improvements in comparison to known prior art devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Earth Drilling (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

Un outil expanseur de tubes (10) comprend un corps d'outil (11), un mandrin axialement mobile (17) s'étendant à travers le corps et comportant une éxtrémité conique (37), un organe de montage de mâchoires (18) relié au corps (11) de l'outil et comprenant plusieurs éléments de mâchoires (55) pouvant s'ouvrir montées en vue de leurs déplacements radiales lors du mouvement axiale du mandrin (17), une tête d'outil réglable (13), située entre le corps (11) de l'outil et l'organe de montage des mâchoires (18) etpouvant se déplacer axialement par rapport au corps (11) de l'outil, et un organe de blockage (52) permettant de blocker la tête (13) de l'outil contre tout mouvement axial lors du positionnement sélectif de la tête d'outil (13), le degré d'ouverture des éléments de mâchoire (55) pouvant ainsi être régulé de façon précise.
PCT/AU1987/000219 1986-07-16 1987-07-15 Ameliorations apportees a des expanseurs de tubes WO1988000503A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8807140A GB2203078B (en) 1986-07-16 1987-07-15 Improvements in and relating to tube expanders
SE8800986A SE8800986D0 (sv) 1986-07-16 1988-03-17 Improvements in and relating to tube expanders

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPH6945 1986-07-16
AUPH694586 1986-07-16

Publications (1)

Publication Number Publication Date
WO1988000503A1 true WO1988000503A1 (fr) 1988-01-28

Family

ID=3771714

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1987/000219 WO1988000503A1 (fr) 1986-07-16 1987-07-15 Ameliorations apportees a des expanseurs de tubes

Country Status (7)

Country Link
AU (1) AU603596B2 (fr)
BE (1) BE1001949A3 (fr)
CA (1) CA1293430C (fr)
FR (1) FR2601605B1 (fr)
GB (1) GB2203078B (fr)
SE (1) SE8800986D0 (fr)
WO (1) WO1988000503A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0417674A1 (fr) * 1989-09-14 1991-03-20 Rothenberger Werkzeuge-Maschinen Gmbh Outil évaseur pour pièces à usiner creuses
WO1992017292A1 (fr) * 1991-04-02 1992-10-15 Kauno Koskinen Pince a dilater les tuyaux
AU643720B2 (en) * 1990-05-30 1993-11-25 Rothenberger Werkzeuge-Maschinen Gmbh Expansion tool for hollow working parts
EP0718057A2 (fr) * 1994-12-25 1996-06-26 Rothenberger Werkzeuge-Maschinen Gmbh Dispositif d'élargissement de pièces creuses
US8517715B2 (en) 2010-04-06 2013-08-27 Milwaukee Electric Tool Corporation PEX expanding tool
US9862137B2 (en) 2015-04-20 2018-01-09 Milwaukee Electric Tool Corporation PEX expanding tool
US9914260B2 (en) 2014-06-20 2018-03-13 Milwaukee Electric Tool Corporation PEX expanding tool
US10000007B2 (en) 2015-06-10 2018-06-19 Milwaukee Electric Tool Corporation PEX expanding tool
US11596999B2 (en) 2019-02-20 2023-03-07 Milwaukee Electric Tool Corporation PEX expansion tool
US11633775B2 (en) 2019-02-20 2023-04-25 Milwaukee Electric Tool Corporation PEX expansion tool
US11779990B2 (en) 2021-04-09 2023-10-10 Milwaukee Electric Tool Corporation Expansion tool
US11819902B2 (en) 2020-11-27 2023-11-21 Milwaukee Electric Tool Corporation Expansion tool
US12023849B2 (en) 2021-02-23 2024-07-02 Milwaukee Electric Tool Corporation PEX expanding tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU3292457A (en) * 1957-11-13 1959-05-07 Rast Wlodzimierz Expanding tool for pipes
DE2552607A1 (de) * 1975-11-24 1977-06-02 Rothenberger Gmbh Co Handwerkzeug zum aufweiten von rohrleitungsenden
AU1096376A (en) * 1975-02-13 1977-08-18 Rothenberger Gmbh & Co. Werkzeuge-Maschinen Kg Device for enlarging pipe ends
AU3056877A (en) * 1976-11-29 1979-05-17 Rothenberger G.m.b.H. Co. Tool for enlarging the ends of pipes
AU3291878A (en) * 1977-02-04 1979-08-09 Rothenberger Gmbh & Go. Werkzeuge-Maschinen KG Mounting, for expanding elements for pipes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1581127A (fr) * 1968-07-25 1969-09-12
DE2616324A1 (de) * 1976-04-14 1977-10-27 Kabel Metallwerke Ghh Vorrichtung zum kalibrieren von rohrenden

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU3292457A (en) * 1957-11-13 1959-05-07 Rast Wlodzimierz Expanding tool for pipes
AU1096376A (en) * 1975-02-13 1977-08-18 Rothenberger Gmbh & Co. Werkzeuge-Maschinen Kg Device for enlarging pipe ends
DE2552607A1 (de) * 1975-11-24 1977-06-02 Rothenberger Gmbh Co Handwerkzeug zum aufweiten von rohrleitungsenden
AU3056877A (en) * 1976-11-29 1979-05-17 Rothenberger G.m.b.H. Co. Tool for enlarging the ends of pipes
AU3291878A (en) * 1977-02-04 1979-08-09 Rothenberger Gmbh & Go. Werkzeuge-Maschinen KG Mounting, for expanding elements for pipes

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5046349A (en) * 1989-09-14 1991-09-10 Rothenberger Werkzeuge-Maschinen Gmbh Expansion tool for hollow working parts
EP0417674A1 (fr) * 1989-09-14 1991-03-20 Rothenberger Werkzeuge-Maschinen Gmbh Outil évaseur pour pièces à usiner creuses
AU643720B2 (en) * 1990-05-30 1993-11-25 Rothenberger Werkzeuge-Maschinen Gmbh Expansion tool for hollow working parts
WO1992017292A1 (fr) * 1991-04-02 1992-10-15 Kauno Koskinen Pince a dilater les tuyaux
EP0718057A2 (fr) * 1994-12-25 1996-06-26 Rothenberger Werkzeuge-Maschinen Gmbh Dispositif d'élargissement de pièces creuses
EP0718057A3 (fr) * 1994-12-25 1996-07-10 Rothenberger Werkzeuge Masch
US8517715B2 (en) 2010-04-06 2013-08-27 Milwaukee Electric Tool Corporation PEX expanding tool
US8763439B2 (en) 2010-04-06 2014-07-01 Milwaukee Electric Tool Corporation PEX expanding tool
US9914260B2 (en) 2014-06-20 2018-03-13 Milwaukee Electric Tool Corporation PEX expanding tool
US9993961B2 (en) 2015-04-20 2018-06-12 Milwaukee Electric Tool Corporation PEX expanding tool
US9862137B2 (en) 2015-04-20 2018-01-09 Milwaukee Electric Tool Corporation PEX expanding tool
US10926451B2 (en) 2015-04-20 2021-02-23 Milwaukee Electric Tool Corporation PEX expanding tool
US11648727B2 (en) 2015-04-20 2023-05-16 Milwaukee Electric Tool Corporation PEX expanding tool
US10000007B2 (en) 2015-06-10 2018-06-19 Milwaukee Electric Tool Corporation PEX expanding tool
US10946576B2 (en) 2015-06-10 2021-03-16 Milwaukee Electric Tool Corporation PEX expanding tool
US11596999B2 (en) 2019-02-20 2023-03-07 Milwaukee Electric Tool Corporation PEX expansion tool
US11633775B2 (en) 2019-02-20 2023-04-25 Milwaukee Electric Tool Corporation PEX expansion tool
US11819902B2 (en) 2020-11-27 2023-11-21 Milwaukee Electric Tool Corporation Expansion tool
US12023849B2 (en) 2021-02-23 2024-07-02 Milwaukee Electric Tool Corporation PEX expanding tool
US11779990B2 (en) 2021-04-09 2023-10-10 Milwaukee Electric Tool Corporation Expansion tool

Also Published As

Publication number Publication date
GB8807140D0 (en) 1988-05-25
SE8800986D0 (sv) 1988-03-17
GB2203078A (en) 1988-10-12
FR2601605B1 (fr) 1991-01-04
BE1001949A3 (fr) 1990-04-24
AU7703887A (en) 1988-02-10
GB2203078B (en) 1990-09-19
AU603596B2 (en) 1990-11-22
FR2601605A1 (fr) 1988-01-22
CA1293430C (fr) 1991-12-24

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