EP0272204A2 - Procédé de réglage d'épaisseur de paroi de tube - Google Patents
Procédé de réglage d'épaisseur de paroi de tube Download PDFInfo
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 26
- 238000007620 mathematical function Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 9
- 230000006978 adaptation Effects 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- 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
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)
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)
| 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)
| 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)
| 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 |
-
1986
- 1986-12-18 DE DE19863643659 patent/DE3643659A1/de active Granted
-
1987
- 1987-12-15 DE DE8787730165T patent/DE3780429D1/de not_active Expired - Lifetime
- 1987-12-15 EP EP87730165A patent/EP0272204B1/fr not_active Expired - Lifetime
Patent Citations (4)
| 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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|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17Q | First examination report despatched |
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