EP1893366A1 - Method for regulating and/or controlling an adjustable roll segment in a continuous casting installation - Google Patents
Method for regulating and/or controlling an adjustable roll segment in a continuous casting installationInfo
- Publication number
- EP1893366A1 EP1893366A1 EP06755230A EP06755230A EP1893366A1 EP 1893366 A1 EP1893366 A1 EP 1893366A1 EP 06755230 A EP06755230 A EP 06755230A EP 06755230 A EP06755230 A EP 06755230A EP 1893366 A1 EP1893366 A1 EP 1893366A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- curve
- sub
- determined
- touch point
- segment type
- 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 32
- 238000009749 continuous casting Methods 0.000 title claims description 8
- 238000009434 installation Methods 0.000 title description 2
- 230000001276 controlling effect Effects 0.000 title 1
- 230000001105 regulatory effect Effects 0.000 title 1
- 238000004364 calculation method Methods 0.000 claims description 18
- 238000012937 correction Methods 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 238000004422 calculation algorithm Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 238000005058 metal casting Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000011295 pitch Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000037433 frameshift Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
- B22D11/208—Controlling or regulating processes or operations for removing cast stock for aligning the guide rolls
Definitions
- the invention relates to a method for controlling and / or controlling an adjustable roller segment in a continuous casting, wherein the roller segment for guiding the strand comprises the following elements: A movable upper frame with at least one upper roller, a subframe with at least one lower roller, a positioning device for relative positioning of the upper frame with respect to the subframe having one or more pitches, wherein an input of the reel segment has an input jaw width and an output an output jaw width.
- Continuous casting plants are used for continuous casting of square (billets) or rectangular (slabs) cross sections in molds.
- the strand is fed into slab plants after emerging from the cooled mold to support the strand shell and to achieve a reduction in thickness in roll segments.
- the segment preferably consists of a movable upper and a fixed subframe, both of which are provided with a plurality of rollers.
- the upper frame of the segment can be positioned with respect to the subframe via, for example, two hydraulic adjusting devices each near the entrance and the exit within certain limits.
- the jaw widths between the first top and bottom rolls at the entrance and the last top and bottom rolls at the exit can be set to preset values.
- the mouth width at the outlet is preferably lower than at the inlet of the roller segment.
- the mouth widths are converted into the Anstellweiten or vice versa.
- the pitches or jaw widths can be calculated with sufficient accuracy.
- an undercut passing through an on-touch point of an input sub-roll and through an off-touch point of an output sub-roll is determined.
- touch points of rollers of the subframe can be defined.
- an upper curve leading through an upper one-contact point (an input upper roller) and through an upper Aus-contact point (an upper output roller) is determined.
- the Anstellweiten be calculated on a setting position of the adjusting device with the aid of the lower curve and the upper curve.
- the lower curve and the upper curve which ultimately describe a guide line or a guide path of the strand within the roller segment, locations and widths between the lower frame and the upper frame can be determined in an advantageous manner.
- the input jaw width from the input touch point and the output jaw width from the output touch point are orthogonal to the sub-curve toward the top frame such that the top one touch point (the input top roll) and the top off touch point (the output top roller) are determined.
- the top one touch point the input top roll
- the top off touch point the output top roller
- the on and off touch points are not necessarily the geometric points of contact (a tangent). Rather, it is points that define the jaw widths - at least for practical applications with sufficient accuracy. This is especially true for the upper points of contact.
- an advantageous extension is that in each case an arc equation is used for the calculation of the curves of the curved segment type, in particular of the uniformly curved segment type.
- a Circular arc equation can be determined for the uniformly curved segment types in a very advantageous manner, the lower curve and the upper curve, which exactly match the points of contact of the roller segment.
- the subcurve is determined by means of a sum of circular arc pieces, in particular by means of a sum of circle equations, and the upper curve is determined by means of a circular arc approximation equation.
- the sub-curve is determined by means of an envelope, in particular by means of a sum of circle equations with center coordinates, radius and angle, preferably by means of value pairs of the circle equations.
- a radius is determined for the circular-arc approximation equation, which is an average of the sum of the radii of the circle equations of the lower curve, in particular of the envelope curve.
- the required accuracy is achieved by determining a correction value as a difference between an undercurve shifted with respect to the lower rollers tangent to the lower rollers and the upper curve, in particular a circular arc approximation curve.
- the embodiment described above has the particular advantage that, despite approximation methods and the determination of correction values, a possible calculation error is compensated. It is expedient that the setting is determined using the correction value at the Anstellpositionen.
- a coordinate origin of a coordinate system is in each case placed in the middle of a projection line, which is produced by projecting the lower curve, preferably a pass line, onto the abscissa.
- the choice of a coordinate system and the determination of a coordinate origin simplify the aforementioned calculation methods by a further.
- the sub-curve is located at a point in the origin of coordinates.
- the origin of the coordinates is preferably in the middle of the roller segment or the lower curve lies at least with the center of the fitting line in the origin of the coordinates.
- the invention also includes a computer program product comprising program code means suitable for performing all the steps of a method according to any one of the preceding claims when the computer program product is executed on a data processing system or automation system.
- a machine-readable program code on a data carrier for example a CD or a memory stick
- data processing systems can advantageously be adapted to a calculation module for the set-up widths, jaw widths, for a setpoint calculation and / or actual value calculation.
- FIG. 1 shows a roller segment in a side view
- FIG. 2 shows a roller segment with a positioning device in a plan view
- 3 shows a segment with adjusting device in a side view
- FIG. 1 schematically shows a roller segment 1 with an upper frame 4 and a lower frame 5.
- a strand 3 is guided through the roller segment 1 by means of a plurality of lower rollers 7 and a plurality of upper rollers 8.
- the strand is guided in the casting direction to an exit EX with a jaw opening 11.
- Decisive for the insertion of a strand and the discharge of a strand is in each case a pair of rollers.
- this is an input sub-roll and an input top roll
- the roll pair consists of an output sub-roll 24 and an output top roll 34.
- FIG. 2 shows a highly schematic representation of a roller segment 1 in a plan view.
- two adjusting devices 12 and 13 or 14 and 15 are present at the entrance EN and at the exit EX.
- An Anstellvoriquess pair thus form the Anstellvortechniken 12 and 13 at the entrance.
- Another Anstellvoriquess pair form the adjusting devices 14 and 15 at the output of the roller segment. 1
- FIG. 3 likewise shows in a highly schematic manner a segment type with adjusting devices in an oblique position.
- the skew is a few mm to about the base length.
- the upper frame 4 is with respect to the sub-frame 5 in one Slope positioned to him.
- the adjusting devices 12, 13, 14 and 15 are adjusted by means of hydraulic cylinders.
- the input EN is positioned higher relative to the output EX via an adjustment width 20 with respect to an adjustment range 21, so that the upper frame 4 is set in the required inclined position. For additional stability of the upper frame 4 is guided over Gleitstoffkappen 50.
- FIG. 4 shows the conversion of throat widths 10, 11 into positioning widths 20, 21 of a straight segment type.
- a straight line equation with the midpoint of an undercurve 26 or a pass line is placed in the coordinate origin.
- An on-touch point which results from the contact of the input sub-roll 22 with the strand 3
- an exit touch point EX which is formed by the contact of an output sub-roll 24 with the strand 3
- the straight-line equation thus describes the sub-curve 26, so that the contact points 22, 24 or generally the sub-rollers 8 of the sub-frame 5 can be described using the sub-curve 26.
- the points on or ox result.
- the point on is approximately the upper one-touch point of an input top roll 32 with the strand 3.
- the top off touch point ox is approximately the point of contact between an output top roll 34 and the strand 3.
- ox is an upper curve 28 defined by means of a straight line equation.
- Figure 5 shows the calculation for a uniformly curved segment type.
- a circular arc equation is used to simulate the contact points en and ex, which arise in each case as a result of the contact of the input lower roller 22 with the strand 3 or the starting lower roller 24 with the strand 3.
- the lower curve 26 forms the arcuate registration line of the lower rollers of a curved segment type.
- the pass line touches the coordinate origin in the coordinate system 27 in the middle of the segment.
- the upper input Touch point on or the upper off-touch point ox with the input top roller 32 and the output top roller 34 determines.
- FIG. 6 shows the definition of the roll layers in the non-uniformly curved segment type.
- the sub-curve 26 or the envelope Curve of the rollers of the sub-frame or the pass line is composed of each of the n rollers of individual circular arc pieces of different radii R 1 .
- the center coordinates X 3 ⁇ Y 1 , the radii R 1 and the angular position ⁇ i of each circular-arc piece are given in a system fixed coordinate system or in a segment-related coordinate system.
- a conversion from a system fixed coordinate system in a segment-related coordinate system can be made due to a known installation position of the segment in a strand transport machine.
- the shifted lower curve 26 ' is also shifted in the non-uniformly curved segment type to the lower curve 26, that a basic position of the segment is shown.
- Figure 7 illustrates a determination of correction values ⁇ Y en ⁇ ⁇ Y ex in determining an envelope for the upper frame 4 with an approximate method.
- the errors or correction values ⁇ Y en and ⁇ Y ex are calculated, which result from the deviation between the sub-curve 26 'shifted into points on and ox to a circular-arc approximation curve 29 result.
- the circular arc approximation curve 29 also passes through the points on and ox and is given a radius R M , where the radius
- FIG. 8 shows a segment-related coordinate system for the non-uniformly curved segment type.
- Calibration to a nominal setting position in the basic position is easily possible by setting a nominal jaw width.
- the nominal jaw width is preferably set by a force-controlled approach to corresponding calibration pieces between the upper and lower entry and exit rollers.
- the calculation algorithms for the straight and circular segment type are very accurate, i. they are limited only by the numerical accuracy of an automation system.
- the calculation algorithm for the non-uniformly curved segment type has an accuracy of less than 0.01 mm with a required control accuracy of about 0.1 mm, which means that even with an approximate calculation, the method is 10 times more accurate than required ,
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Paper (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005028711A DE102005028711A1 (en) | 2005-06-20 | 2005-06-20 | Process to regulate by algorithm the operation of an adjustable roller segment receiving extruded metal and determine output dimensions |
PCT/EP2006/062372 WO2006136483A1 (en) | 2005-06-20 | 2006-05-17 | Method for regulating and/or controlling an adjustable roll segment in a continuous casting installation |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1893366A1 true EP1893366A1 (en) | 2008-03-05 |
EP1893366B1 EP1893366B1 (en) | 2010-03-03 |
Family
ID=36660190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06755230A Not-in-force EP1893366B1 (en) | 2005-06-20 | 2006-05-17 | Method for regulating and/or controlling an adjustable roll segment in a continuous casting installation |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1893366B1 (en) |
CN (1) | CN101267903B (en) |
AT (1) | ATE459443T1 (en) |
DE (2) | DE102005028711A1 (en) |
WO (1) | WO2006136483A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008007247A1 (en) * | 2007-09-13 | 2009-03-19 | Siemens Aktiengesellschaft | Operating method for a rolling mill with curvature detection |
AT506976B1 (en) * | 2008-05-21 | 2012-10-15 | Siemens Vai Metals Tech Gmbh | METHOD FOR CONTINUOUSLY GASING A METAL STRUCTURE |
CN103273032B (en) * | 2013-06-24 | 2016-06-22 | 济钢集团有限公司 | A kind of wide thickness plate continuous casting machine slighter compress fan-shaped section opening degree on-line testing method |
CN114789242A (en) * | 2021-01-25 | 2022-07-26 | 宝山钢铁股份有限公司 | Online adjusting method for trunnion of bending section of continuous casting machine |
CN113927006B (en) * | 2021-10-13 | 2023-05-16 | 大连华锐重工集团股份有限公司 | Four-in-one movable sector centering arc adjusting device |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE464465B (en) * | 1986-06-27 | 1991-04-29 | Oerjan Axelsson | PROCEDURES AND DEVICES FOR SEATING AND REGISTRATION OF A ROLLING SPACE AND GEOMETRY OF A STRING MOLDING MACHINE |
CN1055423C (en) * | 1993-09-08 | 2000-08-16 | 鞍山钢铁公司 | Method and apparatus for quick arc starting of block replacing zone of continuous casting machine |
JP3008821B2 (en) * | 1994-07-29 | 2000-02-14 | 住友金属工業株式会社 | Continuous casting method and apparatus for thin slab |
DE19627336C1 (en) * | 1996-06-28 | 1997-09-18 | Mannesmann Ag | Guiding a cast strip in e.g. steel strip casting units |
DE19809807C2 (en) * | 1998-03-09 | 2003-03-27 | Sms Demag Ag | Setting process for a roller segment of a continuous caster |
DE10011689A1 (en) * | 2000-03-10 | 2001-09-13 | Sms Demag Ag | Process for the continuous casting of slabs and in particular thin slabs |
DE10106252A1 (en) * | 2001-02-10 | 2002-08-14 | Sms Demag Ag | Continuous routing of a continuous caster as well as setting procedures for its roller segments |
DE10141128A1 (en) * | 2001-06-01 | 2002-12-05 | Sms Demag Ag | Adjusting the dynamic soft reduction in continuous casting plants comprises calculating the position of the tip of the liquid phase and components in the casting strand, and adjusting segments of the strand guide accordingly |
DE10204064A1 (en) * | 2001-12-18 | 2003-07-03 | Sms Demag Ag | Width of mouth regulation on segments for continuous casting plants |
DE10326904A1 (en) * | 2003-06-14 | 2004-12-30 | Sms Demag Ag | Process and continuous casting machine for basic setting and checking of the roll gap of roll segments or driver roll pairs |
-
2005
- 2005-06-20 DE DE102005028711A patent/DE102005028711A1/en not_active Ceased
-
2006
- 2006-05-17 CN CN2006800220715A patent/CN101267903B/en not_active Expired - Fee Related
- 2006-05-17 WO PCT/EP2006/062372 patent/WO2006136483A1/en not_active Application Discontinuation
- 2006-05-17 EP EP06755230A patent/EP1893366B1/en not_active Not-in-force
- 2006-05-17 DE DE502006006340T patent/DE502006006340D1/en active Active
- 2006-05-17 AT AT06755230T patent/ATE459443T1/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2006136483A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE459443T1 (en) | 2010-03-15 |
WO2006136483A1 (en) | 2006-12-28 |
DE102005028711A1 (en) | 2006-12-28 |
EP1893366B1 (en) | 2010-03-03 |
DE502006006340D1 (en) | 2010-04-15 |
CN101267903A (en) | 2008-09-17 |
CN101267903B (en) | 2011-01-26 |
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