EP0913211A3 - Method and device for reducing the wall thickness of a hollow block - Google Patents

Method and device for reducing the wall thickness of a hollow block Download PDF

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Publication number
EP0913211A3
EP0913211A3 EP98250360A EP98250360A EP0913211A3 EP 0913211 A3 EP0913211 A3 EP 0913211A3 EP 98250360 A EP98250360 A EP 98250360A EP 98250360 A EP98250360 A EP 98250360A EP 0913211 A3 EP0913211 A3 EP 0913211A3
Authority
EP
European Patent Office
Prior art keywords
wall thickness
hollow block
reducing
cross
rolling mill
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Withdrawn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
EP98250360A
Other languages
German (de)
French (fr)
Other versions
EP0913211A2 (en
Inventor
Karl-Heinz Häusler
Hans Joachim Dr.-Ing. Pehle
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.)
SMS Siemag AG
Original Assignee
SMS Demag 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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP0913211A2 publication Critical patent/EP0913211A2/en
Publication of EP0913211A3 publication Critical patent/EP0913211A3/en
Withdrawn legal-status Critical Current

Links

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
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • 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
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/06—Rolling hollow basic material, e.g. Assel mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0028—Drawing the rolled product

Abstract

Die Erfindung betrifft ein Arbeitsverfahren zur Verringern der Wanddicke am Endes eines in ein Schrägwalzwerk einzuführenden Hohlblockes, zwecks Vermeiden von Rohraufweitungen an den Enden der schräggewalzten, insbesondere dünnwandigen Rohre. Dabei wird die Verringerung der Wanddicke des Hohlblockendes auf eine im wesentlichen dem schräggewalzten Rohr entsprechende Wanddicke in einer dem Schrägwalzwerk nebengeordneten Einrichtung vor dem Einlegen des Hohlblockes in das Schrägwalzwerk vorgenommen.

Figure 00000001
The invention relates to a working method for reducing the wall thickness at the end of a hollow block to be introduced into a cross-rolling mill, in order to avoid pipe widening at the ends of the cross-rolled, in particular thin-walled pipes. The reduction in the wall thickness of the hollow block end to a wall thickness substantially corresponding to the diagonally rolled tube is carried out in a device adjacent to the cross rolling mill before the hollow block is inserted into the cross rolling mill.
Figure 00000001
EP98250360A 1997-10-30 1998-10-13 Method and device for reducing the wall thickness of a hollow block Withdrawn EP0913211A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997148920 DE19748920C2 (en) 1997-10-30 1997-10-30 Method and device for reducing the wall thickness of a hollow block
DE19748920 1997-10-30

Publications (2)

Publication Number Publication Date
EP0913211A2 EP0913211A2 (en) 1999-05-06
EP0913211A3 true EP0913211A3 (en) 2001-05-30

Family

ID=7847712

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98250360A Withdrawn EP0913211A3 (en) 1997-10-30 1998-10-13 Method and device for reducing the wall thickness of a hollow block

Country Status (2)

Country Link
EP (1) EP0913211A3 (en)
DE (1) DE19748920C2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107008768A (en) * 2017-04-18 2017-08-04 浙江益大特钢有限公司 The manufacture method of stainless-steel seamless pipe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH170512A (en) * 1933-04-13 1934-07-15 Singer Fritz Method and device for stretching solid and hollow metal workpieces.
GB2007569A (en) * 1977-11-11 1979-05-23 Accles & Pollock Ltd Method of Forming a Counterbore in the End of a Tube
DE3001959A1 (en) * 1980-01-21 1981-07-23 Kocks Technik GmbH & Co, 4000 Düsseldorf Roller installation for producing billets for tubes - has preload springs to reduce bearing wear
US5125251A (en) * 1988-07-05 1992-06-30 Mannesmann Ag Method and apparatus to reduce the outer diameter and wall thickness of a hollow tube blank by rolling
DE4328002C1 (en) * 1993-08-20 1994-08-04 Schumag Ag Procedure for preparing a thick-walled pipe blank for a subsequent cascade train
US5642638A (en) * 1994-08-24 1997-07-01 Mannesmann Aktiengesellschaft Process for the rolling of hallow ingots on a assel rolling mill

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE686767C (en) * 1937-10-23 1940-01-16 Roehrenwerke Akt Ges Deutsche Mandrel designed for inclined rolling mills for the production of tubes
GB1184707A (en) * 1966-07-05 1970-03-18 Csepel Vas Es Femmuvek A Method and Apparatus for Producing Seamless Rolled Tubes
DE4428530C5 (en) * 1994-08-12 2005-11-10 Kocks Technik Gmbh & Co. Kg Method and rolling stand for the oblique rolling of pipes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH170512A (en) * 1933-04-13 1934-07-15 Singer Fritz Method and device for stretching solid and hollow metal workpieces.
GB2007569A (en) * 1977-11-11 1979-05-23 Accles & Pollock Ltd Method of Forming a Counterbore in the End of a Tube
DE3001959A1 (en) * 1980-01-21 1981-07-23 Kocks Technik GmbH & Co, 4000 Düsseldorf Roller installation for producing billets for tubes - has preload springs to reduce bearing wear
US5125251A (en) * 1988-07-05 1992-06-30 Mannesmann Ag Method and apparatus to reduce the outer diameter and wall thickness of a hollow tube blank by rolling
DE4328002C1 (en) * 1993-08-20 1994-08-04 Schumag Ag Procedure for preparing a thick-walled pipe blank for a subsequent cascade train
US5642638A (en) * 1994-08-24 1997-07-01 Mannesmann Aktiengesellschaft Process for the rolling of hallow ingots on a assel rolling mill

Also Published As

Publication number Publication date
DE19748920A1 (en) 1999-05-12
DE19748920C2 (en) 2003-10-09
EP0913211A2 (en) 1999-05-06

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