EP0272204A2 - Procédé de réglage d'épaisseur de paroi de tube - Google Patents

Procédé de réglage d'épaisseur de paroi de tube Download PDF

Info

Publication number
EP0272204A2
EP0272204A2 EP87730165A EP87730165A EP0272204A2 EP 0272204 A2 EP0272204 A2 EP 0272204A2 EP 87730165 A EP87730165 A EP 87730165A EP 87730165 A EP87730165 A EP 87730165A EP 0272204 A2 EP0272204 A2 EP 0272204A2
Authority
EP
European Patent Office
Prior art keywords
wall thickness
tube
forming
speed
rolling stock
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
EP87730165A
Other languages
German (de)
English (en)
Other versions
EP0272204A3 (en
EP0272204B1 (fr
Inventor
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.)
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 EP0272204A2 publication Critical patent/EP0272204A2/fr
Publication of EP0272204A3 publication Critical patent/EP0272204A3/de
Application granted granted Critical
Publication of EP0272204B1 publication Critical patent/EP0272204B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B17/00Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/14Tube-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

Definitions

  • the invention relates to a method for controlling the tube wall thickness in a multi-stand continuous stretch-reducing mill with devices for measuring the tube wall thickness before the forming and the inlet speed of the tube, a computer unit for processing measured values and a device for speed control of the drive motors of the rolling mill.
  • the stretching of the rolling stock and thus its wall thickness is specifically influenced by the setting of the ratios of the roll speeds from stand to stand.
  • the wall thickness differences in the formed pipes if the speed ratios are unchanged during the forming.
  • measurement of the wall thickness of the incoming tube and corresponding adjustment and change of the roller speed ratios can to a certain extent compensate for different wall thicknesses both from tube to tube and within a tube.
  • Such a device is e.g. B. from Sloma, J., Automatic control of the tube wall thickness on a multi-stand stretch-reducing mill, known from "Problems of project planning", 1973, No.
  • the invention has for its object to compensate for changing tube wall thicknesses in short lengths of rolling stock, in such a way that each rolling stock cross-section is reshaped with maximum, but not greater than the stretching or wall thickness reduction necessary to achieve a desired finished tube wall thickness.
  • the ratios of the roll speeds from the roll stand to the roll stand are continuously adjusted according to a control law (e.g. change in wall thickness to change in the speed ratios) as a function of the minimum value of the wall thickness values which are measured before the forming and are assigned to the rolling stock section , which is located at the respective time in the area of the rolling mill intended to influence the wall thickness.
  • a control law e.g. change in wall thickness to change in the speed ratios
  • the wall thickness of the tube entering the rolling mill is thus measured continuously, the continuous movement of the measuring points assigned to the measurement data is determined by means of speed measurement and the speed setting of the rolling mill depending on the measuring point located in the area of influence of the rolling mill with the smallest extension required for a desired finished tube wall thickness performed. It is continuously determined which Measuring points with the associated stored data are currently located in the area of the rolling train which is intended for influencing the wall thickness.
  • the wall thickness measurement data assigned to the measurement points are compared and the smallest measurement value is used to control the drive motors.
  • stretching target values derived therefrom or differences between these two variables and predetermined target values can also be used.
  • the control law is influenced in accordance with the deviation between the setpoint value of the finished pipe wall thickness and the minimum value of the wall thickness values, which are measured after the forming, and are each to be assigned to a pipe length section which has the same volume as the section of the rolling stock located in the wall thickness influence area of the rolling mill is.
  • control law for determining the drive speeds from the measured values of the wall thicknesses of the pipe before the forming is corrected independently of the pilot control or by means of a control circuit.
  • Such an adaptation can be carried out within a tube as well as from tube to tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
EP87730165A 1986-12-18 1987-12-15 Procédé de réglage d'épaisseur de paroi de tube Expired - Lifetime EP0272204B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3643659 1986-12-18
DE19863643659 DE3643659A1 (de) 1986-12-18 1986-12-18 Verfahren zur steuerung der rohrwanddicke

Publications (3)

Publication Number Publication Date
EP0272204A2 true EP0272204A2 (fr) 1988-06-22
EP0272204A3 EP0272204A3 (en) 1988-11-09
EP0272204B1 EP0272204B1 (fr) 1992-07-15

Family

ID=6316703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87730165A Expired - Lifetime EP0272204B1 (fr) 1986-12-18 1987-12-15 Procédé de réglage d'épaisseur de paroi de tube

Country Status (2)

Country Link
EP (1) EP0272204B1 (fr)
DE (2) DE3643659A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10201717C1 (de) * 2002-01-18 2003-04-10 Sms Meer Gmbh Verfahren und Vorrichtung zum Walzen eines Rohres
DE102017211481A1 (de) 2017-07-05 2019-01-10 Sms Group Gmbh Vorrichtung zur Steuerung eines Streckreduzierwalzwerks
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1158754A (en) * 1967-03-21 1969-07-16 Kocks Wermelskirchen Gmbh Process for Stretch-Reducing Tubes
US3496745A (en) * 1967-05-01 1970-02-24 Kocks Gmbh Friedrich Process for stretch-reducing tubes
DE1427922B2 (de) * 1965-04-07 1973-08-09 Fa. Friedrich Kocks, 4000 Düsseldorf Verstelleinrichtung zum regeln des gesamtstreckgrades beim streckreduzieren von rohren
DE2947233A1 (de) * 1979-11-23 1981-05-27 Kocks Technik GmbH & Co, 4000 Düsseldorf Verstelleinrichtung zum regeln des gesamtstreckgrades eines streckreduzierwalzwerkes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564882A (en) * 1968-04-22 1971-02-23 Allegheny Ludlum Steel Rolling mill control system
JPS60199514A (ja) * 1984-03-22 1985-10-09 Sumitomo Metal Ind Ltd 管の絞り圧延方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1427922B2 (de) * 1965-04-07 1973-08-09 Fa. Friedrich Kocks, 4000 Düsseldorf Verstelleinrichtung zum regeln des gesamtstreckgrades beim streckreduzieren von rohren
GB1158754A (en) * 1967-03-21 1969-07-16 Kocks Wermelskirchen Gmbh Process for Stretch-Reducing Tubes
US3496745A (en) * 1967-05-01 1970-02-24 Kocks Gmbh Friedrich Process for stretch-reducing tubes
DE2947233A1 (de) * 1979-11-23 1981-05-27 Kocks Technik GmbH & Co, 4000 Düsseldorf Verstelleinrichtung zum regeln des gesamtstreckgrades eines streckreduzierwalzwerkes

Also Published As

Publication number Publication date
EP0272204A3 (en) 1988-11-09
DE3643659A1 (de) 1988-07-07
EP0272204B1 (fr) 1992-07-15
DE3643659C2 (fr) 1990-05-17
DE3780429D1 (de) 1992-08-20

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