EP0509621B1 - Verfahren und Vorrichtung zum Rückovalisieren von längsnahtgeschweissten Rohren - Google Patents

Verfahren und Vorrichtung zum Rückovalisieren von längsnahtgeschweissten Rohren Download PDF

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Publication number
EP0509621B1
EP0509621B1 EP92250085A EP92250085A EP0509621B1 EP 0509621 B1 EP0509621 B1 EP 0509621B1 EP 92250085 A EP92250085 A EP 92250085A EP 92250085 A EP92250085 A EP 92250085A EP 0509621 B1 EP0509621 B1 EP 0509621B1
Authority
EP
European Patent Office
Prior art keywords
pipe
rolling
roller
tube
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.)
Expired - Lifetime
Application number
EP92250085A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0509621A1 (de
Inventor
Klaus Keutmann
Franz Nicolai
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0509621A1 publication Critical patent/EP0509621A1/de
Application granted granted Critical
Publication of EP0509621B1 publication Critical patent/EP0509621B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0807—Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off
    • B21C37/0811—Tube treating or manipulating combined with, or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off removing or treating the weld bead

Definitions

  • the invention relates to a method and a device for carrying out the method for the back ovalization of longitudinally welded, in particular austenitic and / or territical tubes after the weld thickening has been rolled in by means of an adjustable roll roller which deforms the weld seam against an internal supporting mandrel and which is mounted in a frame via one of the Length of the inner support mandrel corresponding section of the tube is moved and moved back to its starting position after completion of the rolling stroke.
  • Another known method is based on the rolling in of the thickened seam with the aid of a roller which is arranged so as to be adjustable in a rolling stand which is fixed with respect to the moving tube. Internal and lower support rollers are assigned to the roller.
  • a system based on the rolling process in which a roll stand that can be moved hydraulically in the longitudinal axis of the pipe is used, in which a roll roll is also hydraulically adjustable.
  • the weld seam is smoothed by the roller during a rolling stroke, the rolling stroke usually being carried out against the welding direction.
  • the roller presses the thickened seam against an inner mandrel arranged inside the tube, which advances non-positively to the tube at the welding speed.
  • the stand is hydraulically returned to the starting position with the roller open, while the inner mandrel is pulled back into its basic position.
  • the present invention is based on the object of creating a method for the back ovalization of longitudinally welded pipes after the weld thickening has been rolled in, which, even with smaller pipe diameters, with a relatively thick wall without internal lubrication of the mandrel or the pipe is applicable.
  • a method is proposed according to the invention, which is characterized in that the tube ovalized when the weld seam is rolled out, after the completion of each rolling stroke, is simultaneously compressed over the entire length of the rolling stroke in the direction of the main axes of the oval tube cross section.
  • a device for carrying out the method according to the invention is characterized by two rulers arranged on both sides of the pipe along the roll stroke length, which can be pressed hydraulically against the pipe flanks with the contact surfaces adapted to the pipe circumference.
  • the rulers or roller strips are arranged outside the movement path of the stand supporting the roller.
  • the latter proposal makes it possible to return the stand with the roller to its starting position unhindered while the rulers or roller strips are being used.
  • FIG. 1 denotes the rolling roller, which is mounted so that it can be adjusted in the rolling stand 2.
  • a support roller 4 is arranged on the side of the tube labeled 3 opposite the roller roller 1, which supports the tube against the effective rolling forces.
  • the re-ovalization device according to the invention consists of a multiplicity of prism rollers, which are arranged one behind the other along the tube and are denoted by 5 and are arranged in a roller bar 6 (FIG. 2) on either side of the tube 3.
  • a pipe straightening device is provided, with which the welded pipe is straightened to such an extent that it can pass through the device according to the invention without interference.
  • a swirl stand 8 is provided on the outlet side of the arrangement according to the invention in order to prevent the pipe from twisting.
  • an inner mandrel 9 is provided in the interior of the tube 3, which is carried along by friction when the welded tube is advanced and is positioned between the roller 1 and the support roller 4 during the roller stroke inside the tube.
  • the rolling roller 1 and the support roller 4 can be seen as well as the prism rollers 5 which can be placed laterally on the flanks of the tube 3 and which, together with the strips 6 supporting them, can be moved hydraulically away from the tube 3 in the direction of the arrow 10 and towards the tube 3 are. As indicated by the double arrow 11, the roller 1 can be adjusted against the tube.
  • FIG. 4 roughly schematically indicates the rolling roller and support roller that can be moved in two directions of movement, the tube with the internal mandrel being shown in the region between the rolling roller 1 and the supporting roller 4.
  • the device according to the invention works as follows: A rolling stroke begins with the rolling roller 1 against the thickening of the weld seam of the continuous tube 3.
  • the rolling stroke takes place from the basic position A against or with the direction of passage of the tube 3.
  • the inner mandrel 9 moves non-positively with the advance of the tube 3.
  • the rolling stroke B dashed line
  • the roller is released.
  • the area of the tube 3 which is deformed flat oval by the rolling process is now rounded over the entire length of the rolling stroke by the setting of the lateral strips 6 with the prism rollers 5.
  • the inner mandrel 9 is thus free over the entire length and is retracted into its basic position while the framework 2 is returned to its starting position A with the roller 1 open.
  • the displacement of the inner mandrel 9 without lubrication is not critical because jamming no longer occurs in the tube, which is no longer oval and is rounded over its entire length corresponding to the mandrel. Only when the side strips 6 with their prismatic rollers open does the tube 3 form back into the flat oval shape in the elastic range and the inner mandrel runs non-positively at the beginning of the next rolling stroke.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
EP92250085A 1991-04-16 1992-04-13 Verfahren und Vorrichtung zum Rückovalisieren von längsnahtgeschweissten Rohren Expired - Lifetime EP0509621B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4112740A DE4112740A1 (de) 1991-04-16 1991-04-16 Verfahren und vorrichtung zum rueckovalisieren von laengsnahtgeschweissten rohren
DE4112740 1991-04-16

Publications (2)

Publication Number Publication Date
EP0509621A1 EP0509621A1 (de) 1992-10-21
EP0509621B1 true EP0509621B1 (de) 1995-01-04

Family

ID=6429891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92250085A Expired - Lifetime EP0509621B1 (de) 1991-04-16 1992-04-13 Verfahren und Vorrichtung zum Rückovalisieren von längsnahtgeschweissten Rohren

Country Status (2)

Country Link
EP (1) EP0509621B1 (enExample)
DE (2) DE4112740A1 (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMO20070320A1 (it) * 2007-10-16 2009-04-17 I M E C Tubes S R L Apparato per ridurre un cordone di saldatura
CN109277430B (zh) * 2018-10-30 2024-07-16 中国石油天然气集团有限公司 一种橇装化螺旋埋弧焊管生产线

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH229702A (de) * 1941-01-31 1943-11-15 Hermes Patentverwertungs Gmbh Trennstelle für elektrische Leitungen.
US3590622A (en) * 1968-12-18 1971-07-06 Ernest N Calhoun Apparatus for making tubing

Also Published As

Publication number Publication date
DE59201114D1 (de) 1995-02-16
EP0509621A1 (de) 1992-10-21
DE4112740A1 (de) 1992-10-22
DE4112740C2 (enExample) 1993-06-09

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