EP2090384A2 - Dispositif d'élargissement de tuyaux - Google Patents

Dispositif d'élargissement de tuyaux Download PDF

Info

Publication number
EP2090384A2
EP2090384A2 EP09000925A EP09000925A EP2090384A2 EP 2090384 A2 EP2090384 A2 EP 2090384A2 EP 09000925 A EP09000925 A EP 09000925A EP 09000925 A EP09000925 A EP 09000925A EP 2090384 A2 EP2090384 A2 EP 2090384A2
Authority
EP
European Patent Office
Prior art keywords
cone
held
expander
housing
outer ring
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.)
Withdrawn
Application number
EP09000925A
Other languages
German (de)
English (en)
Other versions
EP2090384A3 (fr
Inventor
Stephan Krämer
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.)
Novopress GmbH Pressen und Presswerkzeuge and Co KG
Original Assignee
Novopress GmbH Pressen und Presswerkzeuge and Co KG
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 Novopress GmbH Pressen und Presswerkzeuge and Co KG filed Critical Novopress GmbH Pressen und Presswerkzeuge and Co KG
Publication of EP2090384A2 publication Critical patent/EP2090384A2/fr
Publication of EP2090384A3 publication Critical patent/EP2090384A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable

Definitions

  • the present invention relates to a device for expanding tubes with a base body which is fixable to the housing of a pressing device, a rotatably and axially displaceably held in the base body about its longitudinal axis cone which is coupled at its one axial end portion with an actuating element of the pressing device and at its other end portion having a widening head engageable conical tip.
  • a device for expanding pipes of this type is for example from EP 16 74 241 A1 known.
  • This device has an expandable in the radial direction expander, which is inserted into a tube to be expanded and then forced apart by the actuation of a pressing device.
  • a smoothing sleeve is inserted into the pipe to be expanded before the expansion head is inserted into the pipe.
  • the smoothing sleeve should be an inhomogeneous Compensate force transmission from the segments to the inside of the pipe.
  • This device has a rotary adapter with a base body which is screwed to the housing of the pressing device and carries on its opposite side a widening head. This consists of individual segments which are movable in the radial direction. The segments of the expander define a central tapered receptacle, in which engages the tip of an axially displaceable and rotatably held in the base body press cone. Upon actuation of the pressing device, the pressing cone is pressed into the expander head, so that its segments are pressed apart.
  • the segment of the expander In order to compensate for inhomogeneities on the inside of the tube to be expanded, resulting from the fact that the segments of the expander are spaced apart in the circumferential direction during the expansion process, is at the known device of the expander respectively rotated upon retraction of the cone by a predetermined amount. This ensures that the force application points of the segments on the inside of the tube shift during each pressing step.
  • the cone in the body of the adapter via a freewheel so positively guided that it is rotated in the retraction movement by a defined amount.
  • the expander head is coupled to the cone tip via entrainment means in such a way that the expander head is rotated during a rotation of the cone.
  • the object of the present invention is therefore to provide a low-maintenance device for expanding pipes, which provides a homogeneous tube expansion allows and at the same time manages without further aids.
  • the object is achieved in a device of the type mentioned above in that the cone is axially divided, wherein a first sub-element carries the conical tip and a second sub-element can be coupled to the actuating element, and wherein the two sub-elements coupled axially fixed to each other and relative to the longitudinal axis are rotatably mounted to each other.
  • the cone is axially divided into a first sub-element, which is in communication with the expansion head and is acted upon by a torque, and a second sub-element, which is coupled to the actuating element of the pressing device. Since the two sub-elements of the cone are rotatable relative to each other, the torque acting on the first sub-element is not transmitted to the second sub-element and thus not to the actuator of the pressing device.
  • rotatable mounting is to connect the two sub-elements of the cone by a sliding or rolling bearing. These can also transmit axial tensile forces. The tensile coupling of the two sub-elements ensures that they move together with axial displacement of a sub-element together.
  • the device according to the invention has a widening head which can be widened in the radial direction and which is rotatably fixed to the base body and which has a conical seat in which the conical tip engages.
  • a further embodiment of the device according to the invention can provide that the cone and the expander head are coupled by entrainment means in such a way that the expander head is rotated about the longitudinal axis during a rotation of the cone.
  • O-rings have the advantage that they are easy to replace and represent very inexpensive wear agents.
  • the use of magnets has the advantage that these as non-mechanical driving means practically no wear.
  • the device can also be configured in a known manner so that the cone is supported on the body by a freewheel with a frictionally held on the cone inner ring and a relative to this rotatable and axially displaceable on the inside of the body outer ring, wherein the freewheel rotation the inner ring relative to the outer sleeve allowed only in one direction, however, blocked in the opposite direction rotation.
  • the freewheel is particularly designed so that it blocks during the backward movement of the cone.
  • the arrangement of the freewheel in the interior of the body offers the advantage that as a result, the freewheel is largely protected from contamination.
  • the rotation of the cone can be effected by a mechanism provided in the device.
  • the outer ring in the main body can be positively guided so that an axial movement of the outer ring also leads to a rotational movement of this.
  • a positive guide can via a running in the outer ring of the freewheel oblique guide and one in this guide engaging pin can be realized, which is held in the body.
  • the freewheel is moved axially.
  • the linear movement is implemented due to the positive guidance in a rotational movement of the outer ring.
  • the cone is not rotated, since the inner ring of the freewheel is rotatable relative to the outer ring in the forward movement.
  • the cone is moved back, blocked the freewheel, with the result that caused by the forced operation rotation of the outer ring also causes a rotation of the cone and thus also associated with this expander.
  • the guide groove extends at its pointing to the pressing device end portion in the longitudinal direction of the base body and at its pointing to the apex end portion obliquely to the longitudinal direction.
  • This type of forced operation ensures that the expansion head is pulled out during retraction of the actuator initially without rotation of the tube. Only when reaching the inclined part of the guide groove of the expander head is defined by the predetermined amount by the oblique groove rotated relative to the base body. As a result, the expander is rotated only when it no longer has contact with the pipe inside the pipe to be expanded and thus is freely rotatable.
  • the press-in recess is located precisely between two expansion segments by a widening segment in the first widening step during the second widening process. Possibly in the first expansion step resulting inhomogeneities on the tube inside are largely eliminated by the second, rotated expansion step.
  • the defined rotation can also amount to a third, a quarter or a fifth of the width of a Aufweitsegments.
  • the positive guidance can be matched to the width of the expansion segments, that, when the tube expansion is performed in X-steps, the rotation is 1 / x-th the width of a Aufweitsegments, where X is an integer between 2 and 20.
  • a tube expansion with more than 20 steps is also possible, for example if the tube material is very sensitive to excessive strains in one step.
  • the invention further relates to a device for expanding tubes with a pressing device, the housing and an axially displaceably held therein actuator comprises a cone which is rotatably and axially displaceable relative to the housing about its longitudinal axis, wherein the cone is coupled at its pointing to the pressing device axial end portion with the actuator of the pressing device and at its other axial end portion has a conical tip, and one in radial Direction expandable and axially rotatable expander having a receptacle, in which engages the actuator, which is characterized in that the expander is fixed directly to the housing of the pressing device, and that the cone and the actuator axially fixed to each other and relative to the longitudinal axis relative are rotatably mounted to each other.
  • the expander head and the cone are mounted directly on the housing of the pressing device, resulting in a compact unit.
  • the cone and the adjusting element are rotatably supported relative to one another about the longitudinal axis of the device, so that a torque acting on the cone tip is not transmitted to the adjusting element.
  • the actuator may be a piston rod which engages in a receptacle of the cone and is held therein, for example by means of a sliding or rolling bearing.
  • a two-part design of the cone is not required in the alternative embodiment, since the rotational decoupling is done directly between the actuator and cone. As a result, no prestressed compression spring is necessary, which presses the cone when retracting the actuating element in the starting position, since the control element and cones are coupled tensile strength with each other.
  • FIGS. 1 to 4 a device for expanding tubes 1 according to the present invention is shown.
  • the device comprises a pressing device 2 with a housing 3, in which an adjusting element 4 is guided axially displaceable.
  • the actuator 4 has at its protruding from the housing 3 end a conical tip 4a.
  • the device further comprises an adapter element A with a base body 5, which is screwed onto a thread 6 of the housing 2.
  • a cone 7 is provided, which is axially displaceable in the base body 5 and is held rotatably about the longitudinal axis X of the device.
  • the cone 7 is coupled at its one axial end region with the adjusting element 4 of the pressing device 2 and has a conical tip 8 at its other end region.
  • the cone 7 is axially divided and comprises a first sub-element 7a, which carries at one end the conical tip 8 and is provided on its opposite side with a receptacle 9, in which engages the second sub-element 7b.
  • the second sub-element 7b has on its side facing the pressing device 2 a conical receptacle 10 in which the conical tip 4a of the adjusting element 4 engages.
  • a rolling bearing 11 is installed, which ensures the free rotation of the sub-elements 7a and 7b against each other and this tensile strength coupled with each other.
  • the cone 7 is supported by a freewheel 16 on the base body 5.
  • the freewheel 16 has an outer ring 17 which is rotatably supported in the main body 5 and axially displaceable.
  • the freewheel 16 further includes an inner ring 18 which is non-positively connected to the cone tip 8 opposite, cylindrically executed end of the first part element 7a of the cone 7.
  • the freewheel 16 is configured such that it allows rotation of the inner ring 18 relative to the outer sleeve 17 in one direction, while blocking rotation in the opposite direction.
  • the outer ring 17 of the freewheel 16 also has a positive guide, which determines the range of motion of the outer ring 17 in the base body 5.
  • the positive guidance is provided by a guide groove 19 provided in the outer ring 17 and an engaging one in the main body 5 held pin 20 is formed.
  • the guide groove 19 extends at its end pointing towards the pressing device 2 in the longitudinal direction X of the base body 5 and in its pointing to the apex 8 end portion obliquely to the longitudinal direction X. This ensures that the first sub-element 7a initially moves back when returning the cone 7 and only upon reaching the inclined portion of the guide groove 19 performs a rotational movement.
  • an expander 21 is rotatably mounted by means of a union nut 22.
  • the expander 21 consists, as in the FIG. 1 can be clearly seen, from individual expansion segments 23a, 23b, which together give a nearly circular cross-section.
  • the individual segments 23a, 23b have on their outer side in each case a projection 24 which engages in an annular groove 25 of the union nut 22 and is held therein radially displaceable.
  • the expansion segments 23a, 23b form a central, conical receptacle 26, in which the conical tip 8 engages.
  • the conical tip 8 and the expander head 21 are coupled together in such a way that a rotation of the first part element 7a of the cone 7 also leads to a rotation of the expander head 21.
  • 8 corresponding driving means are provided at the apex. These include a held in a receptacle 30 of the apex 8 and resiliently biased in the direction of the expansion head 21 Pressure piece 27.
  • a held in an annular groove 8a O-ring 28 is provided, which is in contact with the inside of the expansion segments 23a, 23b, wherein a torque transmission from the cone 7 on the expander by a frictional engagement between the O-ring 28 and the Expansion segments 23a, 23b is made possible.
  • a magnet 29 is provided on the apex 8, which makes a torque transmission to the expander 21 possible. It may well be sufficient to provide only one of the illustrated driving means.
  • the expansion head 21 of the device 1 according to the invention is introduced into a tube to be expanded.
  • the pressing device 2 is actuated, whereby the adjusting element 4 of the in FIG. 2 illustrated starting position in the in FIG. 2 shown position is extended.
  • the cone 7 is pressed against the restoring force of the compression spring 13 in the direction of the expansion head 21.
  • the outer ring 17 is rotated due to the defined by the guide groove 19 and thus engaged pin 20 forced operation. This rotational movement does not transfer to the cone 7, since this can rotate freely through the freewheel 16 relative to the outer ring 17.
  • the actuator 4 of the pressing device 2 is withdrawn.
  • the outer ring 17 of the freewheel 16 due to the positive guidance performs a defined rotation, which runs in the opposite direction as the rotation, which it performs in the forward movement. Since the freewheel 16 blocks in this direction of rotation, the first subelement 7a of the cone 7 and thus also the expansion head 21 rotatably coupled to the conical tip 8 via the entrainment means 27, 28, 29 rotates.
  • This rotational movement of the first partial element 7a is not transmitted to the second partial element 7b and thus also not to the adjusting element 4, since the second partial element 7b of the cone 7 is rotationally coupled via the rolling bearing 11 of the first partial element 7a.
  • FIGS. 5 and 6 an alternative embodiment of a device 1 according to the invention for expanding tubes is shown.
  • This device has the same basic structure as the previously described embodiment, with the proviso that the cone 7 is mounted on the freewheel 16 directly in the housing 3 of the pressing device 2 and the expansion head 21 is fixed directly to the housing 3 via the union nut 25.
  • the adjusting element 4 of the pressing device 2 is designed here as a piston rod, which engages directly in a receptacle 31 of the integrally formed here cone 7 and is axially fixed about a roller bearing 11 and rotatably supported about the longitudinal axis X of the device 1.
  • the expander 21 of this device 1 is inserted into a tube to be expanded and the pressing device 2 is actuated, whereby the adjusting element 4 is advanced.
  • the axial movement of the actuating element 4 causes the cone 7 is pressed into the expander 21 and this expands.
  • the axial movement of the cone 7 also leads to an axial movement of the freewheel 16, the outer ring 17 performs a rotation due to the guided through the guide groove 19 and thus engaged, fixed to the housing 3 pin 20, forced operation. This is not transmitted to the cone 7 due to the rotatability of the freewheel 16, so that this is a pure axial movement performs.
  • the cone 7 Upon retraction of the actuating element 4, the cone 7 is also retracted due to the axially fixed coupling caused by the rolling bearing 11.
  • the outer ring 17 performs a rotational movement in the opposite direction, which is transmitted due to the blocking of the freewheel 16 on the cone 7, so that it is also rotated together with the expander 21.
  • the rotational movement 7 of the cone is not transferred to the adjusting element 4 of the pressing device 2, since this is lubdrekoppelt of the cone 7 via the rolling bearing 11.
EP09000925A 2008-02-18 2009-01-23 Dispositif d'élargissement de tuyaux Withdrawn EP2090384A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200820002265 DE202008002265U1 (de) 2008-02-18 2008-02-18 Vorrichtung zum Aufweiten von Rohren

Publications (2)

Publication Number Publication Date
EP2090384A2 true EP2090384A2 (fr) 2009-08-19
EP2090384A3 EP2090384A3 (fr) 2011-04-20

Family

ID=39339478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09000925A Withdrawn EP2090384A3 (fr) 2008-02-18 2009-01-23 Dispositif d'élargissement de tuyaux

Country Status (2)

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EP (1) EP2090384A3 (fr)
DE (1) DE202008002265U1 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2167255A1 (fr) * 2007-06-25 2010-03-31 Uponor Innovation AB Procédé et outil pour élargir une extrémité de tuyau
WO2011035840A3 (fr) * 2009-09-23 2011-05-19 Rothenberger Ag Dispositif pour élargir des corps creux
DE202011050988U1 (de) * 2011-08-15 2012-11-23 Rehau Ag + Co. Vorrichtung zum Aufweiten hohler Werkstücke, insbesondere der Enden von Kunststoffrohren und Metall-Kunststoff-Verbundrohren, sowie dessen Verwendung
US8517715B2 (en) 2010-04-06 2013-08-27 Milwaukee Electric Tool Corporation PEX expanding tool
CN104707916A (zh) * 2015-03-27 2015-06-17 宁波精达成形装备股份有限公司 一种扩口装置
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
EP2900397B1 (fr) 2012-09-28 2019-06-19 Gustav Klauke GmbH Outil élargisseur à main et procédé pour faire fonctionner un outil élargisseur de travail à main
US11054076B2 (en) 2016-11-04 2021-07-06 Zurn Industries, Llc Reinforcing ring with sleeve
US11543065B2 (en) 2016-09-02 2023-01-03 Zurn Industries, Llc Extruded cold-expansion compression collar
US11541581B2 (en) 2016-09-02 2023-01-03 Zurn Industries, Llc Injection molded cold-expansion compression collar
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1674241A1 (fr) 2004-12-21 2006-06-28 Uponor Innovation Ab Etirage radial de tubes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2552607C2 (de) * 1975-11-24 1985-08-01 Rothenberger GmbH & Co Werkzeuge-Maschinen KG, 6000 Frankfurt Handwerkzeug zum Aufweiten von Rohrleitungsenden
SE501555C2 (sv) * 1993-10-07 1995-03-13 Wirsbo Bruks Ab Förfarande för expandering av en rörände samt verktyg för genomförande av förfarandet
DE19504968A1 (de) * 1995-02-15 1996-08-22 Wirsbo Rohrprod Und Vertr Gmbh Spreizwerkzeug für Kaltverformungen
DE29613985U1 (de) * 1996-08-13 1996-11-14 Wirsbo Rohrprod Und Vertr Gmbh Spreizwerkzeug mit Rückholvorrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1674241A1 (fr) 2004-12-21 2006-06-28 Uponor Innovation Ab Etirage radial de tubes

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8562331B2 (en) 2007-06-25 2013-10-22 Uponor Innovation Ab Method and tool for expanding a pipe end
EP2167255A4 (fr) * 2007-06-25 2010-09-22 Uponor Innovation Ab Procédé et outil pour élargir une extrémité de tuyau
EP2167255A1 (fr) * 2007-06-25 2010-03-31 Uponor Innovation AB Procédé et outil pour élargir une extrémité de tuyau
WO2011035840A3 (fr) * 2009-09-23 2011-05-19 Rothenberger Ag Dispositif pour élargir des corps creux
US8801424B2 (en) 2009-09-23 2014-08-12 Rothenberger Ag Device for expanding hollow bodies
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
DE202011050988U1 (de) * 2011-08-15 2012-11-23 Rehau Ag + Co. Vorrichtung zum Aufweiten hohler Werkstücke, insbesondere der Enden von Kunststoffrohren und Metall-Kunststoff-Verbundrohren, sowie dessen Verwendung
EP2900397B2 (fr) † 2012-09-28 2022-07-13 Gustav Klauke GmbH Outil élargisseur à main
EP2900397B1 (fr) 2012-09-28 2019-06-19 Gustav Klauke GmbH Outil élargisseur à main et procédé pour faire fonctionner un outil élargisseur de travail à main
US9914260B2 (en) 2014-06-20 2018-03-13 Milwaukee Electric Tool Corporation PEX expanding tool
CN104707916A (zh) * 2015-03-27 2015-06-17 宁波精达成形装备股份有限公司 一种扩口装置
US9862137B2 (en) 2015-04-20 2018-01-09 Milwaukee Electric Tool Corporation PEX expanding tool
US9993961B2 (en) 2015-04-20 2018-06-12 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
US11543065B2 (en) 2016-09-02 2023-01-03 Zurn Industries, Llc Extruded cold-expansion compression collar
US11541581B2 (en) 2016-09-02 2023-01-03 Zurn Industries, Llc Injection molded cold-expansion compression collar
US11054076B2 (en) 2016-11-04 2021-07-06 Zurn Industries, Llc Reinforcing ring with sleeve
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
US11779990B2 (en) 2021-04-09 2023-10-10 Milwaukee Electric Tool Corporation Expansion tool

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Publication number Publication date
EP2090384A3 (fr) 2011-04-20
DE202008002265U1 (de) 2008-04-30

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