EP1088605A2 - Verfahren zur kontinuierlichen Herstellung eines ringförmig gewellten Metallrohres - Google Patents

Verfahren zur kontinuierlichen Herstellung eines ringförmig gewellten Metallrohres Download PDF

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Publication number
EP1088605A2
EP1088605A2 EP00120973A EP00120973A EP1088605A2 EP 1088605 A2 EP1088605 A2 EP 1088605A2 EP 00120973 A EP00120973 A EP 00120973A EP 00120973 A EP00120973 A EP 00120973A EP 1088605 A2 EP1088605 A2 EP 1088605A2
Authority
EP
European Patent Office
Prior art keywords
pipe
axis
corrugating
mandrel
speed
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.)
Granted
Application number
EP00120973A
Other languages
English (en)
French (fr)
Other versions
EP1088605A3 (de
EP1088605B1 (de
Inventor
Giuseppe Brega
Vittorio Travini
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.)
Olimpia 80 SRL
Original Assignee
Olimpia 80 SRL
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 Olimpia 80 SRL filed Critical Olimpia 80 SRL
Publication of EP1088605A2 publication Critical patent/EP1088605A2/de
Publication of EP1088605A3 publication Critical patent/EP1088605A3/de
Application granted granted Critical
Publication of EP1088605B1 publication Critical patent/EP1088605B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06Manufacture 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
    • B21C37/15Making tubes of special shape; Making tube fittings
    • B21C37/20Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/205Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with annular guides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D15/00Corrugating tubes
    • B21D15/04Corrugating tubes transversely, e.g. helically
    • B21D15/06Corrugating tubes transversely, e.g. helically annularly

Definitions

  • the invention relates to the field of production of corrugated metal pipes.
  • corrugated metal pipes on the market at present has a spiral corrugation obtained continuously by means of corrugating fixtures also having a spiral shape.
  • metal pipes particularly in stainless or tempered steel, provided with a ring-type or parallel ridge-type corrugation, in that it has been found that they have greater flexibility and are therefore more desirable.
  • corrugated pipes with parallel-ridge corrugation on the market at present are generally obtained by means of a discontinuous process which uses dies on a press, or by means of a process of hydroforming, again discontinuous, which provides for introduction of water into sections of pipe wherein the water, under pressure, presses the pipe against an outer die.
  • the object of the present invention is to simplify and speed up the production of metal corrugated pipes with parallel ridges.
  • Another object is to form corrugated metal pipes with parallel ridges that have constant properties along their entire length.
  • a further object is to make an apparatus for production of corrugated metal tubes with parallel ridges that can operate completely automatically.
  • a pipe to be corrugated is fed inside a corrugating assembly at a first speed or input speed; it is extracted from the corrugating assembly at a second speed, or output speed, lower than the input speed; to be subjected to the combined action of at least two idle, offset, spiral corrugating toothings, with a greater diameter than the pipe, rotationally driven around the axis of the pipe; the pitch of the thread of the corrugating toothings and the feed speed of the pipe being correlated with each other.
  • the corrugating apparatus comprises at least one pair of corrugating fixtures with an inner corrugating thread, having an inner diameter greater than the diameter of the pipe on which they must operate, and disposed one after the other along the axis of travel of the pipe, offset with respect to said axis and preferably adjustable in position at right angles to said axis. It further comprises a mandrel containing said fixtures and rotatable around an axis coinciding with the axis of the pipe and means for rotating said mandrel around the tube axis. It then comprises an upstream draft device and a downstream draft device to determine an input pipe speed and an output pipe speed.
  • the new procedure and the new apparatus make it possible to obtain corrugated metal pipes with parallel ridges in a continuous process and with substantially constant characteristics along the length of the pipe. Furthermore, they allow the height of the corrugation ridge to be regulated.
  • a production line for corrugated pipes comprises a first upstream drive or draft device, referenced 2, a second downstream drive or draft device, referenced 4, and a corrugating assembly referenced 10.
  • the upstream and downstream drive devices 2, 4 are of a per se known type and generally comprise two collaborating tracks, 2a, 2b and 4a, 4b, respectively, of rubber or similar material; the facing portions of the tracks of each device move at the same speed to convey a pipe in the direction of the arrow F.
  • a smooth incoming pipe T generally comes from an upstream forming device, not shown, which can be, for example, a longitudinal welder, per se known.
  • the smooth pipe T is gripped between the tracks 2a, 2b of the drive device 2 and fed at a first speed, or input speed, through a guide bushing 9 to the corrugating assembly 10.
  • a tubular member 22 having its axis coincident with a is mounted within sleeve 20.
  • the member 22 is carried on the sleeve 20 by means of bearings 23, and is thus free in rotation with respect to the sleeve.
  • the seat 14 carries integrally a mandrel denoted as a whole by 24, which will be further described below, which carries two corrugating devices denoted respectively by 26 and 28.
  • the corrugating devices are carried by the mandrel on respective slides 30, 32 and precisely the device 26 is fixed on the slide 30 and 28 on the slide 32.
  • the device 26 carries a corrugating fixture 34 by means of a bearing 36; the corrugating fixture has an inner spiral shaped corrugating surface 37 with its axis b parallel and at a distance with respect to the axis a .
  • the corrugating device 28 carries a corrugating fixture 38 by means of a bearing 40 and the corrugating fixture 38 is similar to 34, that is to say it has a spiral-shaped inner surface 39, and it has a longitudinal axis c spaced from axis a and axis b ; in particular in this case it is coplanar with said two axes and on the opposite side of a with respect to b .
  • Each corrugating fixture 34 and 38 is thus idle around its own axis a or c and is rotationally driven around axis a .
  • the mandrel further carries a guide bushing 42, generally made of bronze or a low-friction material, to guide an outgoing corrugated pipe.
  • the smooth incoming pipe T has its own axis aligned and coinciding with the axis a .
  • Rotation around the axis a is imparted to the sleeve 20, the mandrel 24 and the connected parts from a motor 44, through a shaft 46, a double pulley 48, belts 50 and a further pulley 52 integral with the sleeve.
  • the slides 30, 32 are preferably radially adjustable in position on the mandrel 24, that is to say, it is possible to adjust the distance between the axes b , c and the axis a by a certain amount, according to the diameter of the pipe T to be corrugated.
  • a position adjustment device is shown in Figure 4 and comprises a sleeve 54, applied to one end of the tubular member 22 by means of a threaded coupling 55.
  • the sleeve 54 has a conical tongue 56 that is received in a corresponding groove, respectively 57 in the slide 30 and 58 in the slide 32.
  • the grooves 57 and 58 extend only for an arc of the conical surface.
  • a rotation imparted to the member 22 in any way causes extension or retraction respectively of the sleeve 54.
  • Extension (towards the left in Figure 3) of the sleeve 54 reduces the distance between the axes b and c (which remain symmetrical with respect to the axis a ); movement of the sleeve 54 towards the right in Figure 3 increases the distance between the axes b and c (symmetrically with respect to the axis a ).
  • the fixtures 34 and 38 (axes b and c ) are adjusted according to the diameter of the pipe T to be corrugated.
  • the speeds of the upstream draft device and the downstream draft device are then adjusted according to the pitch of the spirals of the fixtures 34 and 38, generally on an tentative basis.
  • the sleeve and the connected parts are then rotated around axis a from the motor 44.
  • the smooth pipe T is introduced continuously, at the end on the left in the figures, advances in the direction of the arrow F and exits as a corrugated pipe TC.
  • the spirals of the corrugating fixtures 34 and 38 cause a deformation of the side wall of the pipe turning all around it. It is seen that in practice each fixture provides a force contrasting the force exerted by the other fixture at all times.
  • the correlation between the feeding speed of the pipe, the rotational speed of the spirals of the fixtures and the pitch of the spirals thereof determines the corrugation with parallel ridges of the pipe TC.
  • the pitch of the parallel ridges of the pipe TC can be increased or decreased by increasing or decreasing the speed of the downstream draft device 4.
  • references 31 are the axes of fixing means for fixing the device 26 on the slide 30
  • references 33 are the axes of fixing means for fixing the corrugating device 28 on the slide 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Catalysts (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
EP00120973A 1999-10-01 2000-09-27 Verfahren zur kontinuierlichen Herstellung eines ringförmig gewellten Metallrohres Expired - Lifetime EP1088605B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999MI002053A IT1313765B1 (it) 1999-10-01 1999-10-01 Procedimento e apparecchiatura per produzione in continuo di tubometallico corrugato a onde parallele.
ITMI992053 1999-10-01

Publications (3)

Publication Number Publication Date
EP1088605A2 true EP1088605A2 (de) 2001-04-04
EP1088605A3 EP1088605A3 (de) 2002-01-16
EP1088605B1 EP1088605B1 (de) 2006-05-03

Family

ID=11383707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00120973A Expired - Lifetime EP1088605B1 (de) 1999-10-01 2000-09-27 Verfahren zur kontinuierlichen Herstellung eines ringförmig gewellten Metallrohres

Country Status (5)

Country Link
EP (1) EP1088605B1 (de)
AT (1) ATE324950T1 (de)
DE (1) DE60027658T2 (de)
ES (1) ES2264412T3 (de)
IT (1) IT1313765B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1295652A2 (de) * 2001-09-22 2003-03-26 Nexans Verfahren zur Herstellung längsnahtgeschweisster schraubenlinienförmig gewellter Metallrohre
CN109226332A (zh) * 2018-11-15 2019-01-18 宁波市狮山管业有限公司 一体式波纹管连续密波成型设备
CN112091027A (zh) * 2020-09-04 2020-12-18 航天晨光股份有限公司 一种定尺寸长度的无缝薄壁波纹管滚压成型机

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572074A (en) * 1968-01-09 1971-03-23 Pirelli General Cable Works Corrugating methods and apparatus
US3486357A (en) * 1968-06-21 1969-12-30 Universal Metal Hose Co Annular corrugating apparatus for tubing
DE2060024A1 (de) * 1970-12-05 1972-06-08 Kabel Metallwerke Ghh Verfahren zur Herstellung ringfoermig gewellter Metallrohre
US3780556A (en) * 1971-09-27 1973-12-25 Andrew Corp Tube corrugating apparatus and method
DE2400842C2 (de) * 1974-01-09 1982-08-19 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren und Vorrichtung zur Herstellung flexibler Metallrohre
YU42981A (en) * 1980-08-02 1983-09-30 Kabel Metallwerke Ghh Device for transforming even tubes to wave-shaped tubes
DE4137275A1 (de) * 1991-11-13 1993-05-19 Kabelmetal Electro Gmbh Verfahren zur kontinuierlichen herstellung schraubenlinien- oder ringfoermig gewellter metallrohre

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1295652A2 (de) * 2001-09-22 2003-03-26 Nexans Verfahren zur Herstellung längsnahtgeschweisster schraubenlinienförmig gewellter Metallrohre
EP1295652A3 (de) * 2001-09-22 2003-11-12 Nexans Verfahren zur Herstellung längsnahtgeschweisster schraubenlinienförmig gewellter Metallrohre
CN109226332A (zh) * 2018-11-15 2019-01-18 宁波市狮山管业有限公司 一体式波纹管连续密波成型设备
CN109226332B (zh) * 2018-11-15 2024-04-12 宁波市狮山管业有限公司 一体式波纹管连续密波成型设备
CN112091027A (zh) * 2020-09-04 2020-12-18 航天晨光股份有限公司 一种定尺寸长度的无缝薄壁波纹管滚压成型机

Also Published As

Publication number Publication date
EP1088605A3 (de) 2002-01-16
ITMI992053A0 (it) 1999-10-01
IT1313765B1 (it) 2002-09-17
DE60027658T2 (de) 2007-04-05
DE60027658D1 (de) 2006-06-08
ES2264412T3 (es) 2007-01-01
ITMI992053A1 (it) 2001-04-01
EP1088605B1 (de) 2006-05-03
ATE324950T1 (de) 2006-06-15

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