EP1329268A2 - Verfahren und Vorrichtung zum Walzen eines Rohres - Google Patents

Verfahren und Vorrichtung zum Walzen eines Rohres Download PDF

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Publication number
EP1329268A2
EP1329268A2 EP20030000248 EP03000248A EP1329268A2 EP 1329268 A2 EP1329268 A2 EP 1329268A2 EP 20030000248 EP20030000248 EP 20030000248 EP 03000248 A EP03000248 A EP 03000248A EP 1329268 A2 EP1329268 A2 EP 1329268A2
Authority
EP
European Patent Office
Prior art keywords
rollers
rolling
pipe
tube
rolls
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Withdrawn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
EP20030000248
Other languages
German (de)
English (en)
French (fr)
Inventor
Peter Dr.-Ing. Thieven
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 Group GmbH
Original Assignee
SMS Meer GmbH
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 Meer GmbH filed Critical SMS Meer GmbH
Publication of EP1329268A2 publication Critical patent/EP1329268A2/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/78—Control of tube rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/02—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills
    • B21B35/04—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills each stand having its own motor or motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/46—Roll speed or drive motor control

Definitions

  • the invention relates to a method for rolling a tube in a rolling mill, which has at least one roll stand in which at least two interacting Rollers are arranged, each over a defined circumferential section abut the pipe.
  • the invention further relates to a device to carry out the procedure.
  • the tube to be machined passes through a rolling mill in the A number of roll stands are arranged one behind the other in the conveying direction of the tube are. Rolls are stored in each roll stand, which hold the pipe during the rolling process contact each around a defined circumferential section. Work overall several, for example three, rolls together in each roll stand, that the tube is essentially over its entire circumference from the rollers is contacted. The pipe is thus rolled to a reduced diameter and brought it to an exact shape.
  • the tube should have an ideal shape after rolling, i. H. the cylindrical Contour of the outer circumference and that of the inner circumference should be two concentric Form circles.
  • there are always tolerances in the finished pipe so one certain eccentricity of the circular contour of the inner circumference relative to that the outer circumference. This eccentricity is essentially due to the back to the rolling process of the pipe manufacturing process.
  • eccentricity has been reduced-stretching, reducing and sizing not affected, d. H. be dismantled.
  • the one in the semi-finished tube Rather, eccentricity is reflected in the finished rolled pipe.
  • the accordingly existing tolerances have so far been accepted and represent a disadvantage in pipe production Technology so far has not been able to actively use local wall thickness distribution to intervene and influence the circumference of the pipe.
  • the invention is therefore based on the object of providing a rolling method of the type mentioned at the outset and an associated device with which it is possible to reduce or eliminate the existing disadvantages.
  • the circumferential position in the azimuthal center of the respective circumferential section is arranged. Representing the wall thickness the circumferential segment that contacts the roller in question is thus in the middle of the angle section determines the wall thickness.
  • step b) above does not start until the time at which the end of the tube is inserted into the rolls of the Direction of conveyance of the subsequent roll stand has occurred.
  • step b) above does not start until the time at which the end of the tube is inserted into the rolls of the Direction of conveyance of the subsequent roll stand has occurred.
  • the proposed individual control of the rotational speeds of the individual Rolling in a roll stand does not have to be carried out in all roll stands of the rolling mill be provided. Rather, according to a further development, the Measurement of the wall thickness and the corresponding individual control of the rotation speeds only be carried out on selected rolling stands. It is usually sufficient if the selected roll stands are oriented in the conveying direction considered - located at the front of the rolling mill.
  • the device according to the invention for rolling a tube in a rolling mill to carry out the method has at least one roll stand in which at least two cooperating rollers are arranged, each over rest on a defined circumferential section of the pipe and roll it.
  • each roller has a separate, controllable one Has drive.
  • At least two sensors are preferably in front of the rollers in the conveying direction for measuring the wall thickness of the pipe at specified circumferential positions arranged.
  • the measured signals can be used to determine the computer Difference at least two measured wall thicknesses of the tube are supplied.
  • a control or regulation for control or regulation the drives of the rollers are provided with individual rotational speeds become.
  • the rolls can be reducing rolls, in particular stretch-reducing rolls, or act as sizing rolls, which are preferably seamless for rolling Steel pipes are suitable. Over the circumference of the tube act with advantage three or more rollers together.
  • a rolling mill 2 is shown schematically, in which a tube 1 a Stretch reduction rolling process is subjected.
  • the tube 1 passes in the conveying direction R is a number of roll stands, three of which are shown in FIG. 1, namely the mill stands 3, 4 and 5; the number of roll stands is usually clear greater than three.
  • each roll stand Several rolls are arranged in each roll stand, the rolls are schematic 6, 7 and 8 in the roll stand 3, the rolls 15, 16, 17 in the roll stand 4 and the Rolls 29, 30, 31 in the roll stand 5 outlined. It should be noted that it is here is only a schematic representation; actually enclose the respective Rolls 6, 7, 8 or 15, 16, 17 or 29, 30, 31 the circumference of the tube 1 completely, as will become apparent from the following figures. To the Individual rollers 18, 19 and 20 are provided for driving the rollers 6, 7 and 8, which is shown only very schematically in FIG. 1.
  • FIG. 2 shows the section A-A according to FIG. 1.
  • the tube 1 over its entire circumference from the three rollers 6, 7 and 8 is included, only sections of the rollers are shown. Every roller 6, 7 and 8, the tube 1 comprises a circumferential section 9, 10 and 11, which are each 120 °. The tube 1 can thus over its entire Circumference.
  • the pipe 1 is located in the conveying direction R before the first rolling stand 3 - an eccentricity which is exaggerated in the figure: the wall thickness d 1 at the circumferential position 12 of the pipe 1 is smaller than the wall thickness d 2 at the circumferential position 13 or the wall thickness d 3 at the circumferential position 14.
  • three sensors 21, 22 and 23 are arranged in front of the first roll stand 3 in the exemplary embodiment (compare FIGS. 1 and 2).
  • the three sensors 21, 22, 23 are each positioned in the middle of the angular section, which is defined by the three peripheral sections 9, 10 and 11.
  • the sensors 21, 22, 23 can be used to measure the respective wall thicknesses d 1 , d 2 and d 3 for the corresponding circumferential section 9, 10, 11 as they exist in front of the roll stand 3.
  • the arithmetic mean of the measured wall thicknesses d 1 , d 2 and d 3 is formed.
  • the roller or rollers, in the circumferential section 9, 10 or 11 of which a wall thickness d was measured, which is less than the mean value, is driven with a reduced rotational speed ⁇ compared to the rotational speed of the other roller / rollers.
  • the eccentricity of the pipe can compensate itself because the Wall thicknesses d 2 and d 3 in the "thick" peripheral sections 13 and 14 are reduced, the wall thickness d 1 in the peripheral section 12 is increased.
  • FIG. 4 shows the representation corresponding to FIG. 3 for the roll stand 5 (see section CC). It can be seen that the eccentricity has now been reduced. Both the rotational speeds ⁇ 1 , ⁇ 2 and ⁇ 3 and - as a result, the rolling forces F 1 , F 2 and F 3 are the same size.
  • FIG. 5 schematically shows the equipment of the rolling device.
  • the first roll stand 3 can be seen, in front of which the sensors 21, 22 and 23 are arranged over the circumference of the tube 1, viewed in the conveying direction R.
  • the values for the wall thickness d 1 , d 2 and d 3 determined by the sensors are forwarded to a computing means 24. Averaging can take place there and the deviation of the wall thickness values d from this mean value can be determined.
  • the signals are transmitted to a control or regulation 25, which causes the drives 18, 19 and 20 to be controlled accordingly. If a wall thickness value d lies below the determined mean value, the controller 25 outputs a reduced default value for the corresponding rotational speed ⁇ to the drive.
  • the drive 18, which drives the roller 6, was given a lower value for the rotational speed ⁇ 1 than for the drives 19 and 20 for the rollers 7 and 8, the higher values for the rotational speeds ⁇ 2 and ⁇ 3 respectively.
  • rollers with the same Speed are driven by a common motor or with a common output of a transfer case are connected.
EP20030000248 2002-01-18 2003-01-08 Verfahren und Vorrichtung zum Walzen eines Rohres Withdrawn EP1329268A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10201717 2002-01-18
DE2002101717 DE10201717C1 (de) 2002-01-18 2002-01-18 Verfahren und Vorrichtung zum Walzen eines Rohres

Publications (1)

Publication Number Publication Date
EP1329268A2 true EP1329268A2 (de) 2003-07-23

Family

ID=7712423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030000248 Withdrawn EP1329268A2 (de) 2002-01-18 2003-01-08 Verfahren und Vorrichtung zum Walzen eines Rohres

Country Status (3)

Country Link
EP (1) EP1329268A2 (zh)
CN (1) CN1253260C (zh)
DE (1) DE10201717C1 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2085157B1 (en) * 2003-10-07 2012-04-18 Sumitomo Metal Industries, Ltd. Method and apparatus for adjusting rolling positions of rolling rolls constituting three-roll mandrel mill
CN100409953C (zh) * 2004-03-29 2008-08-13 住友金属工业株式会社 管的制造方法及定径轧制装置
CN100409956C (zh) * 2004-03-30 2008-08-13 住友金属工业株式会社 管的定径轧制控制方法及定径轧制控制装置
JP4370572B2 (ja) * 2004-06-30 2009-11-25 住友金属工業株式会社 マンドレルミルの圧延制御方法、圧延制御装置、制御プログラム及び継目無管
WO2012005287A1 (ja) * 2010-07-07 2012-01-12 住友金属工業株式会社 マンドレルミル及び継目無管の製造方法
CN103447300B (zh) * 2013-08-30 2015-08-05 湖北新冶钢特种钢管有限公司 集中传动减径机和减径机对热轧无缝钢管的减径工艺
CN104550281A (zh) * 2014-12-22 2015-04-29 常州市腾田液压机械有限公司 复合管材制造工艺及成形复合生产线
DE102017220750A1 (de) * 2017-11-21 2019-05-23 Sms Group Gmbh Vorrichtung zur Steuerung eines Streckreduzierwalzwerks
DE102018217378B3 (de) * 2018-10-11 2020-03-26 Sms Group Gmbh Wanddickenkontrolle beim Streckreduzieren von Rohren

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1915545A1 (de) * 1969-03-27 1970-12-23 Calmes Dipl Ing Jean Paul Walzwerk zum Reduzieren von Rohren
DE3643659A1 (de) * 1986-12-18 1988-07-07 Mannesmann Ag Verfahren zur steuerung der rohrwanddicke

Also Published As

Publication number Publication date
DE10201717C1 (de) 2003-04-10
CN1436612A (zh) 2003-08-20
CN1253260C (zh) 2006-04-26

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