EP0499094A2 - Elargisseur pour les pièces à usiner creux - Google Patents

Elargisseur pour les pièces à usiner creux Download PDF

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Publication number
EP0499094A2
EP0499094A2 EP92101508A EP92101508A EP0499094A2 EP 0499094 A2 EP0499094 A2 EP 0499094A2 EP 92101508 A EP92101508 A EP 92101508A EP 92101508 A EP92101508 A EP 92101508A EP 0499094 A2 EP0499094 A2 EP 0499094A2
Authority
EP
European Patent Office
Prior art keywords
holding device
expanding
tool
index
expanding mandrel
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.)
Ceased
Application number
EP92101508A
Other languages
German (de)
English (en)
Other versions
EP0499094A3 (en
Inventor
Karl-Heinz Velte
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.)
Rothenberger Werkzeugemaschinen GmbH
Original Assignee
Rothenberger Werkzeugemaschinen GmbH
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 Rothenberger Werkzeugemaschinen GmbH filed Critical Rothenberger Werkzeugemaschinen GmbH
Publication of EP0499094A2 publication Critical patent/EP0499094A2/fr
Publication of EP0499094A3 publication Critical patent/EP0499094A3/de
Ceased 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 invention relates to an expansion tool for hollow, in particular hollow cylindrical, workpieces with a tool base body, with an axially displaceable expanding mandrel having a tapered end, with a holding device for an exchangeable expansion head concentrically surrounding the expanding mandrel, with a drive through which the expanding mandrel moves around a predetermined one Stroke is displaceable against the expansion head, which consists of a cap that can be placed on the holding device and a set of expanding jaws that are guided radially therein, the holding device being mounted in the tool base body in a longitudinally adjustable manner by means of a threaded extension in the direction of the axis (AA) of the expanding mandrel, and one Has ring flange as a stop for the expansion head, and wherein a locking device is present, which acts on the adjustment movement of the holding device with respect to the tool body.
  • AA axis
  • an expanding tool is known in which the holding device for the expansion heads is formed in one piece with the base body and as its threaded extension.
  • a stop ring is arranged on the correspondingly lengthened thread extension of the base body, which can be fixed by an index pin.
  • the union cap known as the jaw retaining ring
  • an adapter ring must be screwed into the jaw retaining ring to ensure a defined guide gap for the flange sectors of the individual expanding jaws, which is secured against twisting by a notch pin is.
  • the grub screw is sensitive to wear and also does not allow reproducible retrieval of a setting that has been identified as useful.
  • the point of application of the grub screw on the holding device is necessarily also on a relatively small diameter, so that when the expansion head, which has a much larger diameter, is screwed on, the holding device can be adjusted unintentionally and unnoticed (leverage effect).
  • the grub screw creates an impression at its point of application. i.e. a deformation in which the grub screw engages again when a slightly different setting is desired.
  • the invention is therefore based on the object of specifying an expansion tool of the type described at the outset, in which a particularly simple, reliable and reproducible presetting of the expansion head is possible.
  • the holding device in the ring flange has index holes for an index pin on a circle concentric to the axis (A-A), which is mounted in the tool body.
  • a reproducible presetting is possible, in particular if the index bores e.g. are marked alphanumerically. It is then possible to assign a specific code to each tube wall thickness, as well as to each of the usable expansion heads, which in turn have different tolerance positions, e.g. when buying additional expansion heads.
  • the locking by means of an index pin is robust, reliable and on a relatively large diameter, so that the torque applied to the holding device when changing the expansion heads cannot lead to an unnoticed and undesired adjustment. In addition, there is no material deformation at the point of engagement of the locking device in the holding device. The large diameter also allows fine indexing.
  • the index pin is preferably designed as a stepped cylinder with a first and a second cylinder surface, which are arranged coaxially with one another to form an annular shoulder and with which the index pin is located in complementary coaxial bores in the main tool body is mounted, wherein a prestressed compression spring is arranged between the bottom of the larger diameter bore and the annular shoulder and wherein the index pin with the larger diameter cylinder surface engages in the index bore of the rotary body holding device designed as a rotary body.
  • the index pin with the cylinder surface of smaller diameter protrudes from the tool body and carries a slide button at the end of this cylinder surface.
  • the drive means can also be chosen arbitrarily.
  • the expanding mandrel can be actuated by a hydraulic piston.
  • the tool body has a first, rigidly attached hand lever, and in the tool body, a pivotable control body is mounted in a gap between two bearing blocks, which acts on the expanding mandrel and is connected to a second, pivotable hand lever.
  • a pivotable control body is mounted in a gap between two bearing blocks, which acts on the expanding mandrel and is connected to a second, pivotable hand lever.
  • the slide button it is expediently guided in the gap between the bearing blocks, and it protrudes from the gap on the side facing away from the hand levers.
  • FIG. 1 shows an expansion tool 1 for the ends of hollow cylindrical workpieces (tubes), which comprises a tool base body 2 made of metal with a first, integrally molded hand lever 3, a threaded bore 4, and a holding device 5 for an expansion head 6 which is axially adjustably mounted therein owns.
  • the holding device 5 consists of a rotating body 7 with a first extension 8 with an external thread 8a, which is largely screwed into the threaded bore 4. This threaded connection serves for the said axial adjustment. Furthermore, the rotary body 7 has a second extension 9 with an external thread 9a for holding the expansion head 6. Between the first and the second extension there is a one-piece molded stop 10 which is designed as an annular flange 11. The rotary body 7 is penetrated by an axial bore 12 in which an expanding mandrel 13 is mounted, which has a truncated cone-shaped end 13a, which causes the expansion jaws to expand when it is displaced longitudinally.
  • the expanding jaws 14 each have a flange sector 14a, which is held radially displaceably on a cap 16 by means of a rivet 15.
  • An annular spring 14b surrounding the flange sectors holds the spreading jaws 14 biased together in the direction of the axis AA.
  • the cap 16 has an internal thread 16a and an annular flange 16b with an annular surface 16c on which the flange sectors 14a can slide.
  • the cap 16 With its edge 16d, the cap 16 abuts the stop 10 or the ring flange 11, the axial distance of the edge 16d from the annular surface 16c on the one hand and the distance of the end face 9a from the ring flange 11 on the other hand being chosen such that between the end face 9a and the annular surface 16c has a gap delimited by plane-parallel surfaces, in which the flange sectors 14a slide with sufficient play.
  • the tapered end 13a of the expanding mandrel 13 protrudes from the bore 12 and plunges coaxially into the set of expanding jaws 14.
  • a freely rotatable roller 18 is mounted by means of a cylindrical roller axis 17, the axis of rotation of which is perpendicular to the mandrel axis A-A, which is also the system axis.
  • the tool base body 2 has a guide part 2a, which is shaped approximately as a cuboid with outer rounded corners and edges.
  • the expanding mandrel 13 projects with the roller 18 upwards out of the guide part 2a.
  • a transition piece 2b with correspondingly sloping outer wall surfaces, by means of which steps and jumps are avoided. These details are not particularly shown in the drawing.
  • Guide part 2a and transition piece 2b have a gap-shaped recess 2c which is open at the top and into which the control body 19 described in more detail below can be immersed.
  • control body 19 acting on the roller 18 is mounted by means of a pivot axis 20 and is integrally connected to a second, pivotable hand lever 21.
  • the expanding mandrel 13 can be displaced clockwise into the position according to FIG. 1 by a predetermined stroke out of the rotating body 7 against the expansion head 6 connected to the holding device 5.
  • the mode of action of the expansion head is, in and of itself, state of the art, so that there is no need to go into detail about it.
  • the control body 19 has a slot 22 which extends from one side to the other and extends in an arc around the pivot axis 20 and is delimited on one side by a first control curve 23 and on the opposite side by a second control curve 24.
  • the clear width of the slot 22 corresponds at every point to the diameter of the roller 18 (plus a slight play), so that the roller 18 is enclosed in the slot 22 and is positively guided in both directions of movement of the expanding mandrel.
  • the roller 18 runs on the first control cam 23 during the expansion process and on the control cam 24 when the expanding mandrel 13 is withdrawn by means of opposing lever movement the roller axis 17, the roller 18 is mounted in and between two inwardly delimited side walls 13b of the expanding mandrel 13. Only the front is visible from the side cheeks.
  • the control cams 23 and 24 are connected to one another by two semi-cylindrical-concave shaped end faces of the arcuate slot 22, the centers of curvature of which, which alternatively coincide with the axis of the roller 18 in the two possible end positions, depending on the stroke of the expanding mandrel 13 different distances from the pivot axis Have 20.
  • the curve is monotonous, i.e. no position of the expanding mandrel is passed through twice when the control body 19 is pivoted in one direction.
  • the control body 19 forms one end of the pivotable hand lever 21 and has an eye 25 for mounting on the pivot axis 20.
  • This passes through a gap 26 in the base body 2 and is laterally outside of the expanding mandrel 13 on the side opposite the hand levers 3 and 21 stored in the base body 2 on both sides of the gap 26.
  • the side walls of the base body delimiting the gap 26, of which only the rear one is visible, can also be referred to as bearing blocks for the pivot axis 20.
  • the side cheeks also serve as additional guides for the expanding mandrel 13 by means of recesses in them that are partially cylindrical (not visible).
  • the rotary body 7 has between the ring flange 11 and the first extension 9 an end face 27 which is radial to the axis A-A and in which index bores 28 are arranged on a circle concentric to the axis A-A, of which only the one lying in the cutting plane is visible.
  • the index pin 29 is designed as a stepped cylinder and has a first and a second cylinder surface 29a and 29b, which are arranged coaxially to form an annular shoulder 29c.
  • the axis of the index pin runs parallel to the axis A-A.
  • the index pin is mounted in complementary axial bores 31 and 32 of the base body 2.
  • a prestressed compression spring 33 which holds the index pin 29 with the larger diameter cylindrical surface 29a in the respective, preselected index bore 28.
  • the index pin protrudes with the cylindrical surface 29b of smaller diameter upwards out of the tool base body 2 and carries a sliding key 34 at the end of this cylindrical surface 29b.
  • This sliding key is guided in the gap 26 described above with little play and secured against rotation and projects on the hand levers 3 and 21 facing away from the gap 26.
  • the operation of the device is as follows: First, with the index pin 29 engaged, an expansion head 6 is screwed onto the external thread 9a and tightened against the ring flange 11 with the edge 16d by hand, ie without tools. Then it is checked in the idle stroke whether the hand levers can be approached without force. If this is not the case, the index pin 29 is raised by means of the sliding key 34 and the rotating body 7 together with the expansion head is turned out of the basic body 2 by a small amount, for which a rotation of 30 to 90 degrees is usually sufficient, that is to say Distance from two to four index holes.
  • a test widening is then carried out and the capillary gap for a pair of tubes is measured.
  • the capillary gap is too small or too large, it can be reduced or enlarged by rotating the rotating body 7 and the expansion head 6 together in one or the other direction of rotation.
  • the device is then ready for any number of subsequent operations, and the index pen prevents unwanted adjustment.
  • the setting process can be facilitated by a scale with a direction indicator ("larger” / "smaller”).
  • the threaded extension 8 is not on the holding device 5, but on the base body 2 so that it protrudes downward, and to provide the holding device 5 with a corresponding threaded hole analogous to the threaded hole 4, only in the opposite direction.
  • the diameter of the adjustment thread 4 / 8a is significantly smaller than the diameter of the external thread 9a for the attachment of the expansion heads, and the holding device is not an adapter in each expansion head but a part that is constantly assigned to the basic device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Automatic Assembly (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Clamps And Clips (AREA)
EP19920101508 1991-02-12 1992-01-30 Expanding tool for hollow work pieces Ceased EP0499094A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4104205 1991-02-12
DE4104205A DE4104205C1 (fr) 1991-02-12 1991-02-12

Publications (2)

Publication Number Publication Date
EP0499094A2 true EP0499094A2 (fr) 1992-08-19
EP0499094A3 EP0499094A3 (en) 1992-10-07

Family

ID=6424872

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920101508 Ceased EP0499094A3 (en) 1991-02-12 1992-01-30 Expanding tool for hollow work pieces

Country Status (6)

Country Link
US (1) US5243845A (fr)
EP (1) EP0499094A3 (fr)
JP (1) JPH05185160A (fr)
AU (1) AU646131B2 (fr)
CA (1) CA2061060A1 (fr)
DE (1) DE4104205C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0619152A1 (fr) * 1992-01-29 1994-10-12 Rothenberger Werkzeuge-Maschinen Gmbh Tête de dilatation pour outil évaseur pour pièces à usiner creuses
WO2011128049A1 (fr) * 2010-04-13 2011-10-20 Rehau Ag + Co Tête d'expansion pour élargisseurs, et élargisseur comprenant une telle tête d'expansion

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5836197A (en) * 1996-12-16 1998-11-17 Mckee Machine Tool Corp. Integral machine tool assemblies
US6439023B1 (en) * 2000-03-22 2002-08-27 General Electric Company Methods and apparatus for retrofitting compressible flanges
CA2419878A1 (fr) * 2002-02-25 2003-08-25 James Creed Dispositif mecanique d'evasement de piliers
ATE256512T1 (de) * 2002-06-06 2004-01-15 Rothenberger Ag Handwerkzeug in form einer zange zum aufweiten von hohlkörpern
US7325436B2 (en) * 2006-05-31 2008-02-05 Enzo Cheng Expanding tool for hollow members
EP2374554B1 (fr) 2010-04-06 2017-09-06 Milwaukee Electric Tool Corporation Outil d'expansion de PEX
US9943949B2 (en) 2010-08-24 2018-04-17 Rothenberger Ag Coupling parts for connecting a driving device to an expander head
DE102010035222B4 (de) * 2010-08-24 2013-04-18 Rothenberger Ag Kupplung für die axiale Verbindung eines Antriebsgerätes mit einem Expanderkopf
US9388885B2 (en) 2013-03-15 2016-07-12 Ideal Industries, Inc. Multi-tool transmission and attachments for rotary tool
TWI433739B (zh) * 2013-04-02 2014-04-11 Chieh Yu Cheng 擴管器
DE102013107294A1 (de) * 2013-07-10 2015-01-15 Gustav Klauke Gmbh Handarbeitsgerät und Hand-Aufweitgerät
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
US9862137B2 (en) 2015-04-20 2018-01-09 Milwaukee Electric Tool Corporation PEX expanding tool
EP3698941A3 (fr) 2019-02-20 2020-10-21 Milwaukee Electric Tool Corporation Outil d'expansion pex
CN212653901U (zh) 2019-02-20 2021-03-05 米沃奇电动工具公司 扩展工具、用于扩展管的工作元件、配件、芯轴组件和管扩展系统
US11110646B2 (en) * 2019-07-23 2021-09-07 Brochman Innovations, Llc PEX tubing expander head
CN214726466U (zh) 2020-11-27 2021-11-16 米沃奇电动工具公司 扩展工具
WO2022217092A1 (fr) 2021-04-09 2022-10-13 Milwaukee Electric Tool Corporation Outil d'expansion

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2511490A1 (de) * 1975-03-15 1976-09-23 Edwin Rothenberger Schweisstec Vorrichtung zum aufweiten von rohrleitungsenden
DE2616324A1 (de) * 1976-04-14 1977-10-27 Kabel Metallwerke Ghh Vorrichtung zum kalibrieren von rohrenden
EP0252868A2 (fr) * 1986-07-07 1988-01-13 Emerson Electric Co. Outil pour élargir les tubes
DE8807784U1 (fr) * 1988-06-15 1988-08-11 Semmler, Allan Raymond
DE3826187A1 (de) * 1988-08-02 1990-02-08 Rothenberger Werkzeuge Masch Aufweitewerkzeug fuer hohle werkstuecke

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1238012A (en) * 1917-04-09 1917-08-21 Walker K Burwell Nut-lock.
US1717668A (en) * 1927-10-29 1929-06-18 Dhaenens Peter Nut lock
DE8800503U1 (fr) * 1988-01-18 1989-05-18 Hesse, Kurt, 8510 Fuerth, De

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2511490A1 (de) * 1975-03-15 1976-09-23 Edwin Rothenberger Schweisstec Vorrichtung zum aufweiten von rohrleitungsenden
DE2616324A1 (de) * 1976-04-14 1977-10-27 Kabel Metallwerke Ghh Vorrichtung zum kalibrieren von rohrenden
EP0252868A2 (fr) * 1986-07-07 1988-01-13 Emerson Electric Co. Outil pour élargir les tubes
DE8807784U1 (fr) * 1988-06-15 1988-08-11 Semmler, Allan Raymond
DE3826187A1 (de) * 1988-08-02 1990-02-08 Rothenberger Werkzeuge Masch Aufweitewerkzeug fuer hohle werkstuecke

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0619152A1 (fr) * 1992-01-29 1994-10-12 Rothenberger Werkzeuge-Maschinen Gmbh Tête de dilatation pour outil évaseur pour pièces à usiner creuses
WO2011128049A1 (fr) * 2010-04-13 2011-10-20 Rehau Ag + Co Tête d'expansion pour élargisseurs, et élargisseur comprenant une telle tête d'expansion
AU2011240323B2 (en) * 2010-04-13 2014-12-11 REHAU Industries SE & Co. KG Expansion head for expansion tools and expansion tool comprising said expansion head
AU2011240323C1 (en) * 2010-04-13 2015-04-02 REHAU Industries SE & Co. KG Expansion head for expansion tools and expansion tool comprising said expansion head

Also Published As

Publication number Publication date
US5243845A (en) 1993-09-14
AU1033492A (en) 1992-08-20
DE4104205C1 (fr) 1992-10-08
JPH05185160A (ja) 1993-07-27
AU646131B2 (en) 1994-02-10
CA2061060A1 (fr) 1992-08-13
EP0499094A3 (en) 1992-10-07

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