US20140305178A1 - Device for undulating a pipe - Google Patents

Device for undulating a pipe Download PDF

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Publication number
US20140305178A1
US20140305178A1 US14/147,853 US201414147853A US2014305178A1 US 20140305178 A1 US20140305178 A1 US 20140305178A1 US 201414147853 A US201414147853 A US 201414147853A US 2014305178 A1 US2014305178 A1 US 2014305178A1
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US
United States
Prior art keywords
pipe
undulating
undulation
support sleeve
undulated
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.)
Abandoned
Application number
US14/147,853
Inventor
Nico Lange
Christian Reiter
Christian Frohne
Holger Schulz
Michael Meyer
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.)
Nexans SA
Original Assignee
Nexans 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 Nexans SA filed Critical Nexans SA
Assigned to NEXANS reassignment NEXANS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FROHNE, CHRISTIAN, MEYER, MICHAEL, REITER, CHRISTIAN, Lange, Nico, SCHULZ, HOLGER
Publication of US20140305178A1 publication Critical patent/US20140305178A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/124—Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes
    • 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
    • B21D15/00—Corrugating tubes
    • B21D15/04—Corrugating tubes transversely, e.g. helically
    • 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
    • B21D15/00—Corrugating tubes
    • B21D15/04—Corrugating tubes transversely, e.g. helically
    • B21D15/06—Corrugating tubes transversely, e.g. helically annularly

Definitions

  • the invention relates to a device for imparting an undulation to a smooth pipe composed of metal, wherein, in the position of operation, the undulation extends transversely of the longitudinal direction of the pipe with wave crests and wave valleys extending in the circumferential direction of the pipe, which has an undulating unit with a projection producing the undulation, and in which a guide sleeve is mounted for guiding the smooth pipe travelling in its longitudinal direction (EP 1 084 774 B1).
  • Such a device is used for manufacturing pipes of metal having a good bending capability, for example of steel, of copper, or of aluminum.
  • pipes can be used in building electrical or optical cables or as electrical conductors of high frequency cables, or for transporting flowable media.
  • the undulation can be constructed to be shaped helically or ring-shaped. The degree of bending capability depends substantially on the depth of the undulation, i.e. on the radial difference between the wave crests and the wave valleys.
  • a pipe is formed of a longitudinally entering metal strip which is welded at a longitudinal slot.
  • the resulting smooth pipe is subsequently undulated transversely of its longitudinal direction in an undulating unit.
  • a guide sleeve whose internal diameter is virtually the same as the external diameter of the smooth pipe, called an undulating sleeve, is arranged immediately in front of the undulating unit equipped with an undulating disk.
  • the undulated pipe emerging from the undulating unit is moved by means of an elongated hollow shaft connected to the undulating unit, wherein the hollow shaft is connected so an electric motor.
  • the hollow shaft surrounds the undulated pipe at a distance.
  • the invention is based on the object of configuring the device described above in such a way that the dimensions of the undulated pipe are maintained, particularly also in a relatively deep undulation, with increased accuracy of shape or roundness.
  • This object is met in accordance with the invention by arranging a support sleeve immediately following the undulating unit, which support sleeve tightly surrounds the undulated pipe which leaves the undulating unit in a pulling off direction without impairing the movement of the pipe in its longitudinal direction.
  • the support sleeve which may be short in the axial direction, constitutes a kind of fixed point for the pipe already during the undulating process, during which a significant load is applied to the pipe in the radial direction.
  • the support sleeve ensures that the pipe cannot already depart in the radial direction from its desired central position during undulating, or particularly after leaving the undulating unit.
  • the pipe leaving the undulating unit and moving in the pulling off direction has a uniform or constant undulation and uniform or constant dimensions. Because of the very precise guidance of the pipe through the support sleeve and after undulating, pipes with thin walls can be undulated with particular advantage, and it is also possible to produce a deeper undulation which is of significance for undulation of thin-walled pipes.
  • the support sleeve resting tightly against the undulated pipe has the further advantage that the guide sleeve mounted in front of the undulating unit does not have to rest tightly against the smooth pipe, but may have a greater internal width as compared to the outer diameter of the smooth pipe.
  • FIG. 1 schematically illustrates an arrangement for manufacturing an undulated pipe.
  • FIG. 2 shows on a larger scale a device, according to the invention, which can be used in the arrangement according to FIG. 1 .
  • a smooth pipe 1 of metal is to be provided with an undulation which extends transversely of its longitudinal direction.
  • the manner of manufacturing the pipe 1 is insignificant in this context.
  • the pipe may be, for example, of steel or copper or aluminum.
  • the undulation to be produced in an undulating unit 2 can be constructed ring shaped or helically shaped.
  • the pipe 1 is moved by means of an only schematically illustrated pulling off device 3 in the direction of arrow 4 and, as a result, the pipe 1 is moved in the direction of arrow 4 which is thereby pushed in the illustrated embodiment through the undulating unit 2 .
  • a guide sleeve 5 is arranged in front of the undulating unit 2 through which the smooth pipe 1 is guided.
  • the undulated pipe 6 leaving the undulating unit 2 in the pulling off direction is guided by a support sleeve 7 which is arranged immediately following the undulating unit 2 .
  • the undulated. pipe 6 can be wound onto a coil 8 .
  • the undulating unit 2 used in the device is basically known. Accordingly, only those portions of the device required for the understanding of the invention are explained.
  • the undulating unit 2 includes an undulating head 9 which is constructed as a ring shaped disk with a central opening. In the central opening, an undulating disk 10 is rotatably mounted, for example, by means of a ball bearing 11 .
  • the undulating disk 10 has a radially inwardly projecting protrusion 12 by means of which during operation of the device the undulation is compressed into the smooth pipe 1 .
  • the undulating disk 10 is arranged eccentrically relative to the axis A of the pipe 1 or the undulated pipe 6 . Accordingly, the axes of the undulating disk 10 and the pipes 1 or 6 extend parallel to each other at a distance from each other.
  • the undulating head 9 and the undulating disk 10 taken along by the undulating head 9 , are rotated in the circumferential direction about the pipe 1 .
  • the protrusion 12 of the undulating disk 10 presses the undulation into the pipe 1 which is simultaneously pushed in the direction of arrow 4 through the undulating unit 2 .
  • the support sleeve 7 is arranged immediately adjacent, or in the pulling off direction behind the undulating unit 2 , namely concentrically with the axis A of the pipe 1 or 6 .
  • the support sleeve 7 may also be connected to the undulating head 9 , specifically with such a tightness that it is rotated together therewith or rotatable through a bearing, so that the support sleeve 7 is not rotated together with the undulating head 9 .
  • the support sleeve 7 can also be mounted on the undulating head 9 without being attached to the undulating head 9 .
  • the support sleeve 7 may be of synthetic material, such as polyethylene or polyamide, but also of metal, for example, a bronze alloy.
  • the support sleeve 7 surrounds the undulated pipe 6 as tightly as possible without, however, being in such tight contact that the movement, of the undulated pipe 6 is impaired in its longitudinal direction. Because of the function of the support sleeve 7 , the support sleeve 7 already constitutes a type of fixed point for the undulated pipe 6 because the pipe is held in a central position during the undulating process and also thereafter by means of the support sleeve 7 . Because of this function of the support sleeve 7 , it is no longer necessary that the guide sleeve 5 rests tightly on the smooth pipe 1 . This is indicated in FIG. 2 by an air gap between pipe 1 and guide sleeve 5 . The guide sleeves does not participate in the rotation of the undulating unit 2 . Accordingly, the guide sleeve 5 is supported relative to the undulating unit 2 through a roller bearing 13 .
  • the support sleeve 7 is relatively short in the axial direction.
  • it can have a width which in the case of an annular undulation is equal approximately to the distance between two successive wave crests or in the case of a helical undulation, the distance is approximately equal to twice the undulation pitch.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Wire Processing (AREA)

Abstract

A device for imparting an undulation to a smooth pipe (1) composed of metal which has wave peaks and wave valleys extending transversely relative to the longitudinal direction of the pipe. The device has an undulating unit (2) with a protrusion which rotates in the circumferential direction in the position of operation for producing the undulation. Arranged in front of the undulating unit (2) is a guide sleeve (5) for guiding the smooth pipe (1) moved in its longitudinal direction. A support sleeve (7) is arranged immediately behind the undulating unit (2) which tightly surrounds the undulated pipe (6) which leaves the undulating unit (2) in the pulling off direction without impairing the movement of the undulated pipe (6) in its longitudinal direction.

Description

    RELATED APPLICATION
  • This application claims the benefit of priority from European Patent Application No. 13 305 005.4, filed on Jan. 7, 2013, the entirety of which is incorporated by reference.
    • BACKGROUND
  • 1. Field of the invention
  • The invention relates to a device for imparting an undulation to a smooth pipe composed of metal, wherein, in the position of operation, the undulation extends transversely of the longitudinal direction of the pipe with wave crests and wave valleys extending in the circumferential direction of the pipe, which has an undulating unit with a projection producing the undulation, and in which a guide sleeve is mounted for guiding the smooth pipe travelling in its longitudinal direction (EP 1 084 774 B1).
  • 2. Description of Related Art
  • Such a device is used for manufacturing pipes of metal having a good bending capability, for example of steel, of copper, or of aluminum. For example, such pipes can be used in building electrical or optical cables or as electrical conductors of high frequency cables, or for transporting flowable media. The undulation can be constructed to be shaped helically or ring-shaped. The degree of bending capability depends substantially on the depth of the undulation, i.e. on the radial difference between the wave crests and the wave valleys.
  • In the known device according to the above mentioned EP 1 084 774 B1 a pipe is formed of a longitudinally entering metal strip which is welded at a longitudinal slot. The resulting smooth pipe is subsequently undulated transversely of its longitudinal direction in an undulating unit. A guide sleeve whose internal diameter is virtually the same as the external diameter of the smooth pipe, called an undulating sleeve, is arranged immediately in front of the undulating unit equipped with an undulating disk. The undulated pipe emerging from the undulating unit is moved by means of an elongated hollow shaft connected to the undulating unit, wherein the hollow shaft is connected so an electric motor. The hollow shaft surrounds the undulated pipe at a distance.
    • OBJECT AND SUMMARY
  • The invention is based on the object of configuring the device described above in such a way that the dimensions of the undulated pipe are maintained, particularly also in a relatively deep undulation, with increased accuracy of shape or roundness.
  • This object is met in accordance with the invention by arranging a support sleeve immediately following the undulating unit, which support sleeve tightly surrounds the undulated pipe which leaves the undulating unit in a pulling off direction without impairing the movement of the pipe in its longitudinal direction.
  • The support sleeve, which may be short in the axial direction, constitutes a kind of fixed point for the pipe already during the undulating process, during which a significant load is applied to the pipe in the radial direction. The support sleeve ensures that the pipe cannot already depart in the radial direction from its desired central position during undulating, or particularly after leaving the undulating unit. As a result, the pipe leaving the undulating unit and moving in the pulling off direction has a uniform or constant undulation and uniform or constant dimensions. Because of the very precise guidance of the pipe through the support sleeve and after undulating, pipes with thin walls can be undulated with particular advantage, and it is also possible to produce a deeper undulation which is of significance for undulation of thin-walled pipes. The support sleeve resting tightly against the undulated pipe has the further advantage that the guide sleeve mounted in front of the undulating unit does not have to rest tightly against the smooth pipe, but may have a greater internal width as compared to the outer diameter of the smooth pipe.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • An embodiment of the subject matter of the invention is illustrated in the drawings. In the drawing:
  • FIG. 1 schematically illustrates an arrangement for manufacturing an undulated pipe.
  • FIG. 2 shows on a larger scale a device, according to the invention, which can be used in the arrangement according to FIG. 1.
    •  DETAILED DESCRIPTION
  • Using an arrangement according to FIG. 1, a smooth pipe 1 of metal is to be provided with an undulation which extends transversely of its longitudinal direction. The manner of manufacturing the pipe 1 is insignificant in this context. The pipe may be, for example, of steel or copper or aluminum. The undulation to be produced in an undulating unit 2 can be constructed ring shaped or helically shaped.
  • For example, the pipe 1 is moved by means of an only schematically illustrated pulling off device 3 in the direction of arrow 4 and, as a result, the pipe 1 is moved in the direction of arrow 4 which is thereby pushed in the illustrated embodiment through the undulating unit 2. As seen in the pulling off direction, a guide sleeve 5 is arranged in front of the undulating unit 2 through which the smooth pipe 1 is guided. The undulated pipe 6 leaving the undulating unit 2 in the pulling off direction is guided by a support sleeve 7 which is arranged immediately following the undulating unit 2. The undulated. pipe 6 can be wound onto a coil 8.
  • In the following, the invention will be explained in more detail with the aid of FIG. 2:
  • The undulating unit 2 used in the device is basically known. Accordingly, only those portions of the device required for the understanding of the invention are explained. The undulating unit 2 includes an undulating head 9 which is constructed as a ring shaped disk with a central opening. In the central opening, an undulating disk 10 is rotatably mounted, for example, by means of a ball bearing 11. The undulating disk 10 has a radially inwardly projecting protrusion 12 by means of which during operation of the device the undulation is compressed into the smooth pipe 1.
  • In accordance with FIG. 2 the undulating disk 10 is arranged eccentrically relative to the axis A of the pipe 1 or the undulated pipe 6. Accordingly, the axes of the undulating disk 10 and the pipes 1 or 6 extend parallel to each other at a distance from each other. During operation of the device, the undulating head 9 and the undulating disk 10, taken along by the undulating head 9, are rotated in the circumferential direction about the pipe 1. In this connection, the protrusion 12 of the undulating disk 10 presses the undulation into the pipe 1 which is simultaneously pushed in the direction of arrow 4 through the undulating unit 2.
  • The support sleeve 7 is arranged immediately adjacent, or in the pulling off direction behind the undulating unit 2, namely concentrically with the axis A of the pipe 1 or 6. For example, the support sleeve 7 may also be connected to the undulating head 9, specifically with such a tightness that it is rotated together therewith or rotatable through a bearing, so that the support sleeve 7 is not rotated together with the undulating head 9. However, the support sleeve 7 can also be mounted on the undulating head 9 without being attached to the undulating head 9. The support sleeve 7 may be of synthetic material, such as polyethylene or polyamide, but also of metal, for example, a bronze alloy.
  • The support sleeve 7 surrounds the undulated pipe 6 as tightly as possible without, however, being in such tight contact that the movement, of the undulated pipe 6 is impaired in its longitudinal direction. Because of the function of the support sleeve 7, the support sleeve 7 already constitutes a type of fixed point for the undulated pipe 6 because the pipe is held in a central position during the undulating process and also thereafter by means of the support sleeve 7. Because of this function of the support sleeve 7, it is no longer necessary that the guide sleeve 5 rests tightly on the smooth pipe 1. This is indicated in FIG. 2 by an air gap between pipe 1 and guide sleeve 5. The guide sleeves does not participate in the rotation of the undulating unit 2. Accordingly, the guide sleeve 5 is supported relative to the undulating unit 2 through a roller bearing 13.
  • Advantageously, the support sleeve 7 is relatively short in the axial direction. For example, it can have a width which in the case of an annular undulation is equal approximately to the distance between two successive wave crests or in the case of a helical undulation, the distance is approximately equal to twice the undulation pitch.

Claims (5)

What is claimed is:
1. Device for imparting an undulation to a smooth pipe having metal which extends transversely of the longitudinal direction of the pipe with wave peaks and wave valleys extending in a circumferential direction of the pipe, said device comprising:
an undulating unit with a projection which has a protrusion rotating in the circumferential direction in the position of operation,
wherein in front of the undulating unit a guide sleeve is mounted for guiding the smooth pipe which is moved in the longitudinal direction of the pipe, and
wherein a support sleeve is arranged immediately following the undulating unit which tightly surrounds the undulated pipe leaving the undulating unit in the pulling off direction without impairing the movement of the pipe in its longitudinal direction.
2. Device according to claim 1, wherein, in the case of an annularly undulated pipe, the axial width of the support sleeve equals approximately the distance between two successive wave crests.
3. Device according to claim 1, wherein, in the case of a helically undulated pipe, that the axial width of the support sleeve equals approximately twice the undulation pitch.
4. Device according to claim 1, wherein the support sleeve is tightly connected to an undulation head of the undulating unit, wherein the undulation head is rotatable about its axis.
5. Device according to claim 1, wherein the support sleeve is connected to an undulation head with the intermediate arrangement of a roller bearing, wherein the undulation head is rotatable about its axis.
US14/147,853 2013-01-07 2014-01-06 Device for undulating a pipe Abandoned US20140305178A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13305005.4 2013-01-07
EP13305005.4A EP2752256B1 (en) 2013-01-07 2013-01-07 Device for corrugating a pipe

Publications (1)

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US20140305178A1 true US20140305178A1 (en) 2014-10-16

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US14/147,853 Abandoned US20140305178A1 (en) 2013-01-07 2014-01-06 Device for undulating a pipe

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US (1) US20140305178A1 (en)
EP (1) EP2752256B1 (en)
KR (1) KR20140090101A (en)
CN (1) CN103909127A (en)
RU (1) RU2013158762A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106122659B (en) * 2016-08-19 2017-12-15 李中来 The process equipment and processing method of circumferential bellows
CN106328314B (en) * 2016-09-13 2017-07-14 芜湖市旭辉电工新材料有限责任公司 A kind of accompanying-heat cable cross-linked polyolefin insulating barrier extrudes technique
CN109967590B (en) * 2017-12-27 2020-08-11 航天海鹰(哈尔滨)钛业有限公司 Titanium alloy U-shaped corrugated pipe differential temperature continuous forming method
CN108480442A (en) * 2018-05-25 2018-09-04 长园电力技术有限公司 A kind of recovery device of cable metal bellows
CN109226332B (en) * 2018-11-15 2024-04-12 宁波市狮山管业有限公司 Integral type bellows continuous dense wave former
CN112091027B (en) * 2020-09-04 2021-04-16 航天晨光股份有限公司 Seamless thin-wall corrugated pipe rolling forming machine with fixed length

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735616A (en) * 1969-11-27 1973-05-29 Pirelli General Cable Works Method of and apparatus for corrugating tubing
US3796078A (en) * 1972-10-30 1974-03-12 Torrington Co Apparatus for making spiral corrugations

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Publication number Priority date Publication date Assignee Title
GB791514A (en) * 1954-02-01 1958-03-05 Gen Electric Co Ltd Improvements in or relating to machines and methods for corrugating tubes
FR1321153A (en) * 1961-05-17 1963-03-15 Hackethal Draht & Kabelwerk Ag Machine for the continuous production of thin-walled corrugated ducts
US3387477A (en) * 1965-11-29 1968-06-11 Price Pfister Brass Mfg Apparatus and method for roll forming flexible tubing
JPH0685944B2 (en) * 1985-11-13 1994-11-02 コンパニ・アンデユストリエル・ダプリカシオン・テルミツク・セ・イ・ア・テ Corrugated pipe manufacturing equipment
DE4137275A1 (en) * 1991-11-13 1993-05-19 Kabelmetal Electro Gmbh METHOD FOR THE CONTINUOUS PRODUCTION OF SCREW LINE OR RING SHAPED METAL PIPES
EP1084774B1 (en) 2000-01-28 2003-04-02 Nexans Method for the continuous production of a longitudinally seam welded and corrugated metal tube and device for carrying out this method
DK1181994T3 (en) * 2000-08-17 2003-12-22 Nexans Apparatus for producing annular corrugated tubes
CN201500708U (en) * 2009-09-03 2010-06-09 北京宝凯金属软管有限公司 Metal corrugated pipe production device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735616A (en) * 1969-11-27 1973-05-29 Pirelli General Cable Works Method of and apparatus for corrugating tubing
US3796078A (en) * 1972-10-30 1974-03-12 Torrington Co Apparatus for making spiral corrugations

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Publication number Publication date
EP2752256A1 (en) 2014-07-09
EP2752256B1 (en) 2016-06-15
KR20140090101A (en) 2014-07-16
CN103909127A (en) 2014-07-09
RU2013158762A (en) 2015-07-10

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Owner name: NEXANS, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LANGE, NICO;REITER, CHRISTIAN;FROHNE, CHRISTIAN;AND OTHERS;SIGNING DATES FROM 20140129 TO 20140203;REEL/FRAME:032484/0279

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE