EP2315636A2 - Method for adjusting a tensile stress of a strip, control and/or regulation device, storage medium, program code for carrying out said method, and industrial plant for processing strips - Google Patents
Method for adjusting a tensile stress of a strip, control and/or regulation device, storage medium, program code for carrying out said method, and industrial plant for processing stripsInfo
- Publication number
- EP2315636A2 EP2315636A2 EP09780684A EP09780684A EP2315636A2 EP 2315636 A2 EP2315636 A2 EP 2315636A2 EP 09780684 A EP09780684 A EP 09780684A EP 09780684 A EP09780684 A EP 09780684A EP 2315636 A2 EP2315636 A2 EP 2315636A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tension
- roller assembly
- roller
- control
- band
- 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 54
- 238000012545 processing Methods 0.000 title claims abstract description 16
- 238000003860 storage Methods 0.000 title claims description 9
- 230000033228 biological regulation Effects 0.000 title claims description 3
- 239000002184 metal Substances 0.000 claims abstract description 35
- 230000000712 assembly Effects 0.000 claims description 62
- 238000000429 assembly Methods 0.000 claims description 62
- 239000002131 composite material Substances 0.000 claims description 22
- 238000005096 rolling process Methods 0.000 claims description 22
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 230000008859 change Effects 0.000 claims description 11
- 238000013519 translation Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000013459 approach Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 7
- 230000014616 translation Effects 0.000 description 6
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
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
- B21B37/48—Tension control; Compression control
-
- 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
- B21B37/48—Tension control; Compression control
- B21B37/52—Tension control; Compression control by drive motor control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/06—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring tension or compression
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
- B21B39/08—Braking or tensioning arrangements
- B21B39/082—Bridle devices
Definitions
- the invention relates to a method for adjusting a tensile stress of a strip. Furthermore, the invention relates to a control and / or regulating device for carrying out the method, a program code, a storage medium and an industrial plant for processing strip, in particular metal strip.
- Roller composites as used in the present invention are used, for example, in rolling metal strip, especially cold rolling, and in treatment lines, such as e.g. used in the coating, pickling, heating or similar processes of metal strips.
- These roller assemblies are used to adjust the belt tension for a metal belt to be machined.
- the belt tension substantially influences the machining process, for example the decrease in thickness during rolling of a rolling stock. Often these are also referred to as a tensioning roller set.
- roll composites can also be used in the textile industry, for example for textile tapes or in the plastic guide for plastic tapes, and thus also the method mentioned above.
- the slippage of the belt, in particular metal strip brings along with the occurring process errors during rolling further disadvantages. If, for example, a metal strip undetected slips over a roll for a prolonged period of time, the usually existing special coating of the slipping roll may become worn. As a result, the coefficient of friction of the roller shell surface is reduced and the problems occurring in the rolling process are further enhanced. Furthermore, the damaged roll - after discovery - replaced. This leads to additional costs, since possibly due to the required change of the damaged roll a plant downtime is required.
- Slipping rollers can also lead to a significant loss of quality in the metal band produced or treated or to be treated. Due to the slipping of the metal strip over a roller, its surface can be damaged, which possibly leads to rejects, however, at least, which leads to economic losses for the operator.
- the invention has for its object to provide a method, a device and a program code by means of which a slippage of tape in a belt processing plant can be reduced or avoided.
- the procedural part of the object is achieved by a method for adjusting a tension of a belt, in particular metal strip, wherein the belt is guided simultaneously by means of a first roller assembly and by means of a second roller assembly, wherein each determines an actual train ratio for the first and the second roller assembly is, wherein the actual train ratios of the first and second roller assembly are adjusted by means of a change in the tension of the band between the roller assemblies such that the respective actual train ratio of a respective predetermined target train ratio of the first and second roller assembly is approximated.
- the specification of the desired train ratios can be static or dynamic.
- used target train ratios are dynamic, i. adapted at least in each case to the material passing through the plant.
- the desired train ratios can be made as a function of the design of the roller assemblies used with regard to tension transmission and / or as a function of the drives assigned to the roller assemblies.
- the rollers of the roller assembly each have a wrap angle of at least 30 ° in normal operation.
- the rollers do not serve for a plastic deformation of the belt, as is the case for example when rolling by means of rollers.
- a band engagement of the roller assembly at a certain point usually takes place only from one side of the band and not simultaneously from opposite hinge sides.
- the band can be provided, such as a tape storage, or it can also take place only a transport of the tape between the roller assemblies, without another function for the system except the translation of the band trains and the transport of the band is reached.
- the method can be used for more than two roller assemblies.
- it is already advantageous in the use of two Rollenverbunden applicable.
- the method can be carried out particularly advantageously as a control and / or regulating method.
- the method can also be used outside of the metal industry, for example in the paper industry, the textile industry and the plastics industry, in particular wherever band-shaped goods have to be processed in industry.
- the process can be implemented easily for existing plants and thereby contribute to a significant improvement in the operation of old plants in the context of plant modernization.
- the tension is changed such that the desired train ratios of the first and the second roller assembly are substantially equal.
- a distribution of the total load on the drives of the roller assemblies is achieved, which is particularly advantageous.
- belt slipping can be avoided particularly well.
- the absolute and / or relative train ratio is used as Buchüberech.
- a quotient of the higher intended for the roll compound target strip tension and the lower intended for the same role composite target strip tension or the quotient of higher applied to the roller assembly actual strip tension and the lower applied to the same role composite actual strip tension is understood
- relative train translation is understood to mean a quotient which relates an absolute train ratio of a group of roles to its maximum absolute train ratio. For example, the following relationship can be used for the relative actual / desired train ratio:
- the maximum absolute tension ratio is a characteristic of the role grouping used and is usually specified by the supplier or manufacturer of the role grouping.
- the use of the relative Buchwald Anlagen in the above-described approach is advantageous.
- the tensile stress is changed on the basis of the relative actual tensile ratios of the first and second roller assemblies and / or the band tension applied to the first and / or second roller assemblies. This can be done throughout the process. tion of the metal strip, which passes through the roller assemblies, a possible advantageous Glasberger GmbH be set for the respective role of composites.
- a tension setting is set as directly as possible between the roller assemblies, which increases the process reliability and the speed of the method.
- the tension of the band between the roller assemblies is set to a value substantially equal to the geometric mean of an inlet side band tensioner in the mass flow direction of the second
- the tension of the belt between the roller assemblies is changed based on a deviation of the relative actual train ratios of the first and second roller assemblies.
- the change in the tensile stress is effected by means of a redistribution of a drive load between the drives assigned to the first and second roller assemblies.
- the device-related part of the object is achieved by means of a control and / or regulating device for an industrial plant, in particular rolling mill and / or treatment line, with machine-readable program code, which comprises control commands which, when executed, the control and / or regulating device for To carry out the method according to one of claims 1 to 7.
- the part of the object to be assigned to the program code is achieved by a machine-readable program code for a control and / or regulating device for a roller assembly of an industrial plant, such as a rolling mill and / or a treatment line, for processing strip, in particular metal strip, the program code having control commands, which cause the control and / or regulating device for carrying out the method according to one of claims 1 to 7.
- the device-related part of the object is achieved by a storage medium with a machine-readable program code stored thereon according to claim 9.
- the device-related part of the object is also achieved by an industrial plant, in particular rolling mill and / or treatment line, with a first roller assembly and a second roller assembly in each case for adjusting a belt tension of one of these simultaneously guided band, with a control and / or regulating device according to claim 8, wherein the control and / or regulating device with the first and / or second roller assembly for the control and / or regulation, in particular of the respective roller assemblies associated drives, is operatively connected.
- FIG 1 shows an industrial plant, suitable for carrying out the method according to the invention
- FIG 2 is a schematic flow diagram for exemplary
- 1 shows a section of an industrial plant 1, in particular a treatment line for processing metal strip B.
- the plant comprises a rolling zone 5 with a roll stand
- a belt tension measuring device 7 in the form of a measuring roller.
- the belt tension of the brought up from the rolling band band is detected.
- rolling in the rolling zone 5 requires a high strip tension in order to avoid problems in processing the metal strip B.
- a considered section of the metal strip B is guided through a first roller assembly 2, with which the tensile stress of the metal strip B can be adjusted. After passing through the first roller assembly 2, the belt tension can be detected again with another belt tension measuring device 7.
- the band memory 4 is an exemplary unit which is arranged between the first roller assembly 2 and a second roller assembly 3, which is arranged downstream of the band storage 4.
- a further tape tension measuring device 7 is arranged between the tape storage 4 and the second roller assembly 3.
- the belt tension or the strip tension of the metal strip B entering the second roller assembly 3 can be detected.
- the metal strip B is guided by the second roller assembly 3, wherein the second roller assembly 3, a further belt tension measuring device 7 is arranged downstream. This makes it possible to detect the band tension of the expiring from the second Rollverbund 3 metal strip B.
- This arrangement of belt tension measuring devices 7 according to FIG. 1 is advantageous, since in this way actual train ratios for the first and second roller assemblies 2 and 3 are easy to determine.
- FIG. 1 The detail of a treatment line 1 shown in FIG. 1 also shows a control and regulating device 8, which is operatively connected to the above-mentioned belt tension measuring devices 7 and to the drives of the first and second roller assemblies 2 and 3, respectively.
- the control and regulating device 8 are supplied by means of the belt tension measuring devices 7 respectively before and after the first and second roller assembly 2 and 3 detected band tension. The control and regulating device 8 then determines therefrom the absolute and relative actual train ratios for the first and second roller assemblies 2 and 3, respectively.
- the absolute actual tensile ratio is determined, for example, as a quotient of a higher actual strip tension and a lower actual strip tension or as a quotient of a higher target tension and a lower target tension.
- the relative Buchwalder can advantageously the quotient with a counter consisting of a product with the first factor formed of absolute Buchüber Anlagen minus one and the second factor 100 and the denominator of the quotient formed from the maximum absolute train ratio minus one.
- the relative train ratio is zero, and at an absolute actual train ratio equal to the maximum absolute actual train ratio, the relative train ratio is 100.
- control and / or regulating device changes the relative actual train ratios in the direction of desired, desired relative train ratios for the respective roller assemblies 2 or 3 off.
- the rolling region 5 shown in FIG. 1 is a high-tensile region, a high ribbon tension must be maintained in it so that the upstream rolling can take place. If there is a drop in the belt tension in the high-tension area in order to adjust the relative tension ratios of the roller assemblies 2 and 3, respectively. This can cause a variety of problems, such as banding and tension oscillations.
- the belt tension in a pull-down region can not be increased as desired. If the belt tension was increased here in order to match the relative tensile ratios of the roller assemblies 2 and 3, this could lead to scratches on the belt or mechanical damage to the equipment.
- the change in the tension for the belt section arranged between the rollers is preferably carried out in such a way that the relative tension ratios of the first and second roller assemblies 2 and 3 are set substantially to a same value. This ensures the best possible distribution of the total load between the drive loads of the motors 11 or drives driving the roller assemblies, as a result of which belt slippage can be avoided.
- FIG. 2 shows a flow chart for the schematic representation of the sequence of an embodiment of the method according to the invention.
- the flowchart shown in FIG 2 assumes that the industrial plant 1 of FIG 1 is in operation and metal strip B is passed through the industrial plant 1. If device designations with reference numbers are mentioned below, they refer to devices shown in FIG.
- the tape tension of the tape is on the input side and output side of the respective roller assembly 2 and 3 mit- Tels of each existing tape tension measuring devices 7 detected.
- an absolute actual tension ratio for the respective roller assembly 2 or 3 is determined by the higher tape tension or actual tape tension on the respective roller assembly 2 or 3 by the lower voltage applied to this tape tension or actual tape tension, recorded in the Process steps 20, 21, 22 and 23, respectively.
- the now present absolute actual train ratio for the respective roller assembly 2 or 3 is now set in relation to the maximum absolute train ratio for the respective roller assembly, which may be allowed to exist at most on the Rolleverbund 2 or 3.
- the maximum absolute tension ratio can be different or equal for the first roller assembly 2 and the second roller assembly 3. This is a technical design and specification of the respective roller combination 2 or 3.
- a method step 26 it is then checked whether the determined relative actual train ratio deviates from a predetermined relative desired train ratio.
- the relative target train ratios for the roller assemblies 2 and 3 are predetermined such that they are the same for the first and second roller assemblies 2 and 3 respectively. If there is no deviation of the actual train ratios from the relative nominal train ratios of the roller assemblies 2 or 3, the method is started anew, ie the belt tension on the inlet side and outlet side for the respective roller composite 2 or 3 is determined by means of the belt tension measuring device. 7.
- a deviation of the relative actual tension ratio from the relative nominal tension ratio of the respective roller composite 2 or 3 is given, then in a method step 27 a tension is determined for the band between the roller assemblies 2 or 3, so that the deviation between the actual train translations is reduced from the desired train translations.
- the tension to be set between the roller assemblies 2 or 3 or a change in tension between the roller assemblies 2 and 3 to be set can be determined differently in method step 27.
- the tensile stress for lenverbunden 2 and 3 arranged band area particularly simple as geometric means from the current inlet side strip tension of the first roller 2 and the current outfeed-side strip tension of the second roller assembly 3 according to FIG 1 ermit- telt be determined.
- first roller assembly 2 and the second roller assembly 3 have different maximum absolute train ratios, for example due to constructive differences, then the change in tension between the roller assemblies 2 or 3 can preferably be adjusted by means of a PI controller.
- Input value for this PI controller is a measure of the deviation of the relative actual train ratios of the two roller assemblies 2 and 3 respectively.
- the PI controller preferably regulates the change in tension between the roller assemblies 2 and 3, respectively, such that the relative actual tensile ratios of the first and second roller assemblies 2 and 3, respectively, match each other.
- the adjustment of the tensile stress in the band region of the band B between the roller assemblies 2 and 3 takes place in a method step 28 by changing the distribution of the drive loads of the drives or motors 11 associated with the roller assemblies.
- the process is carried out until the processing of the metal strip B in the treatment line 1 of FIG. 1 is completed. Whether the method is to be terminated is queried in the exemplary embodiment after each run of the method in a method step 29.
- the strip runs are preferably carried out continuously and temporally parallel to the processing of previously recorded strip passes and further processed, so that the highest possible measuring density and thus corresponding control accuracy of the method is ensured.
- the method can also be advantageously used in modifications of the illustrated embodiment for an industrial plant for processing strip-shaped goods.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL09780684T PL2315636T3 (en) | 2008-08-20 | 2009-07-16 | Method for adjusting a tensile stress of a strip, control and/or regulation device, storage medium, program code for carrying out said method, and industrial plant for processing strips |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008038551A DE102008038551A1 (en) | 2008-08-20 | 2008-08-20 | Method for adjusting a tension of a belt, control and / or regulating device, storage medium, program code for carrying out the method and an industrial system for processing tape |
PCT/EP2009/059123 WO2010020486A2 (en) | 2008-08-20 | 2009-07-16 | Method for adjusting a tensile stress of a strip, control and/or regulation device, storage medium, program code for carrying out said method, and industrial plant for processing strips |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2315636A2 true EP2315636A2 (en) | 2011-05-04 |
EP2315636B1 EP2315636B1 (en) | 2013-08-28 |
Family
ID=41566615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09780684.8A Active EP2315636B1 (en) | 2008-08-20 | 2009-07-16 | Method for adjusting a tensile stress of a strip, control and/or regulation device, storage medium, program code for carrying out said method, and industrial plant for processing strips |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP2315636B1 (en) |
CN (1) | CN102123800B (en) |
BR (1) | BRPI0918405A2 (en) |
DE (1) | DE102008038551A1 (en) |
PL (1) | PL2315636T3 (en) |
RU (1) | RU2011110461A (en) |
WO (1) | WO2010020486A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104785541A (en) * | 2015-03-27 | 2015-07-22 | 中冶南方工程技术有限公司 | Segmentation compression roller type tensile stress distribution control device |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103223422B (en) * | 2012-01-30 | 2015-04-22 | 宝山钢铁股份有限公司 | Fluctuation control method for strip steel tension between racks of hot continuous rolling mill |
RU2494828C1 (en) * | 2012-04-19 | 2013-10-10 | Открытое акционерное общество "Магнитогорский металлургический комбинат" | Method of automatic strip tension adjustment at continuous mill roughing stands |
CN103920714B (en) * | 2013-01-15 | 2016-06-29 | 宝山钢铁股份有限公司 | Skin pass rolling tension amplification method and device |
RU2620424C2 (en) * | 2015-10-21 | 2017-05-25 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Магнитогорский государственный технический университет им. Г.И. Носова" (ФГБОУ ВПО "МГТУ") | Method of automatic control of the speed of horizontal and vertical rollers of the universal cell of the hot rolling steel |
RU2687354C1 (en) * | 2018-06-01 | 2019-05-13 | федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" | Method of matching speeds of vertical and horizontal rolls of universal cage of rolling mill |
CN111250550B (en) * | 2020-01-15 | 2022-03-18 | 首钢京唐钢铁联合有限责任公司 | Control method and control system of tension roller set |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5942568B2 (en) * | 1978-12-15 | 1984-10-16 | 新日本製鐵株式会社 | Tension control method for temper rolling equipment |
JPS60231517A (en) * | 1984-05-02 | 1985-11-18 | Toshiba Corp | Tension control device for single stand rolling mill |
JPH09225514A (en) * | 1996-02-23 | 1997-09-02 | Kawasaki Steel Corp | Tension control method of looper equipment |
DE102004043150A1 (en) * | 2004-09-03 | 2006-03-09 | Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH | Tensioning roller for a belt treatment plant and belt treatment plant and use of the tensioning roller |
-
2008
- 2008-08-20 DE DE102008038551A patent/DE102008038551A1/en not_active Withdrawn
-
2009
- 2009-07-16 EP EP09780684.8A patent/EP2315636B1/en active Active
- 2009-07-16 RU RU2011110461/02A patent/RU2011110461A/en not_active Application Discontinuation
- 2009-07-16 BR BRPI0918405A patent/BRPI0918405A2/en not_active IP Right Cessation
- 2009-07-16 WO PCT/EP2009/059123 patent/WO2010020486A2/en active Application Filing
- 2009-07-16 CN CN2009801322137A patent/CN102123800B/en active Active
- 2009-07-16 PL PL09780684T patent/PL2315636T3/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2010020486A2 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104785541A (en) * | 2015-03-27 | 2015-07-22 | 中冶南方工程技术有限公司 | Segmentation compression roller type tensile stress distribution control device |
CN104785541B (en) * | 2015-03-27 | 2017-03-01 | 中冶南方工程技术有限公司 | Segmentation roller tensile stress DCU distribution control unit |
Also Published As
Publication number | Publication date |
---|---|
PL2315636T3 (en) | 2014-01-31 |
BRPI0918405A2 (en) | 2015-11-24 |
WO2010020486A3 (en) | 2010-04-29 |
DE102008038551A1 (en) | 2010-02-25 |
CN102123800A (en) | 2011-07-13 |
EP2315636B1 (en) | 2013-08-28 |
WO2010020486A2 (en) | 2010-02-25 |
RU2011110461A (en) | 2012-09-27 |
CN102123800B (en) | 2013-06-26 |
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