EP2598264B1 - Rollgang einer walzstrasse - Google Patents

Rollgang einer walzstrasse Download PDF

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Publication number
EP2598264B1
EP2598264B1 EP11733626.3A EP11733626A EP2598264B1 EP 2598264 B1 EP2598264 B1 EP 2598264B1 EP 11733626 A EP11733626 A EP 11733626A EP 2598264 B1 EP2598264 B1 EP 2598264B1
Authority
EP
European Patent Office
Prior art keywords
roller table
converter
segment
rolling
sub
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.)
Active
Application number
EP11733626.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2598264A1 (de
Inventor
Jürgen RUPP
Martin Bischoff
Birger Schmidt
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to EP11733626.3A priority Critical patent/EP2598264B1/de
Publication of EP2598264A1 publication Critical patent/EP2598264A1/de
Application granted granted Critical
Publication of EP2598264B1 publication Critical patent/EP2598264B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B21B39/12—Arrangement or installation of roller tables in relation to a roll stand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/06—Thermomechanical rolling

Definitions

  • the invention relates to a roller table for transporting a rolling stock in a rolling train, wherein the roller table has at least two drive segments operated by converters.
  • the invention relates to a method for operating the roller table.
  • the rolling stock e.g. Metal slabs transported on rollers between individual processing stations. Depending on the material, temperature and Walzgutdicke the rolling is rolled different times. Individual rolling stands are run through several times. The transport of a rolling stand, the reversal of direction and the return transport to the mill stand done on both sides of the rolling mill arranged roller tables.
  • roller tables are divided into individual segments, which are controlled separately. Starting and transporting the rolling stock from one segment to the next must be smooth. Therefore, the use of converters is essential.
  • each roller table segment is controlled separately via an inverter in rolling mills.
  • the more roller table segments that comprise a rolling train the more flexible this rolling line is in terms of the distances of the processed rolled materials.
  • many roller table segments also mean many converters with the associated acquisition costs. Thus, a must Rolling mill operators always find a compromise between investment costs and the highest possible flexibility of the roller table operation to maximize throughput.
  • a roller conveyor with several sub-segments.
  • Each of these sub-segments has rollers, each driven by motors.
  • Several motors are controlled by a respective roller control device.
  • the role controllers in turn, contain speed instructions from controllers.
  • Inverters for controlling drives are also known from other technical fields. Thus, for example, reveals EP 1 906 518 A2 a parallel connection of converters for high power drives, such as ships or wind power plants.
  • the invention has for its object to provide an improvement over the prior art for a roller table of the type mentioned.
  • the roller table for transporting a rolling stock in a rolling train on at least two driven via inverter drive segments wherein at least a sub-segment of the roller table by means of a switching unit to a first inverter and / or a second inverter is switchable.
  • a flexibilization of the rolling train is effected in comparison to known solutions with a constant number of converters.
  • Individual roller table segments can be flexibly shortened and extended as required.
  • the stacking density of the rolling materials can be increased by this variable roller table segmentation. This significantly improves the throughput of the rolling train.
  • variable inverter assignment of the subsegment leads to a better utilization of the inverters.
  • fewer total inverters are required to achieve the desired functionality.
  • Another advantage is a reduction in electricity costs, because currently not required roller table motors by the flexible interconnection either secondarily with operated at a lower speed or placed in a standby mode.
  • a redundancy of the drive supply is achieved at least for the subsegment. If one inverter fails, emergency operation can be maintained with the other inverter.
  • one segment of the roller table is permanently assigned to each inverter in addition to the switchable sub-segment. This facilitates the design of the inverter with upright flexibility of the roller table.
  • the switching unit comprises a plurality of contactors, by means of which the sub-segment can be switched to an inverter output.
  • the contactors are easy to control and allow safe switching of the inverter.
  • the contactors are designed as vacuum contactors, which allow more switching operations than ordinary circuit breakers.
  • the inventive method provides that during a rolling mill operation, a sub-segment of the roller table is separated by means of switching unit of a converter and / or connected to another inverter. It is advantageous if continuously the position of a rolling stock is detected and depending on a switching of the subsegment takes place from one inverter to the other inverter. This allows a particularly smooth onward transport of the rolling stock from one roller table segment to the next.
  • the illustration comprises a rolling stand 4 with rollers 1, 1 'arranged on both sides.
  • a first rolling stock 5 leaves the rolling stand 4 and is transported further by means of roller table 1.
  • On this roller table 1 is already another rolling 5 ', which has already passed the rolling stand 4 and optionally cooled.
  • roller table 1 On the other side of the roll stand 4, the same features.
  • the considered roller table 1 has a plurality of rollers.
  • a first roller table segment a is assigned to a first converter 2a fixed.
  • the corresponding roller drives are directly connected to the output of the first converter 2a.
  • a second roller table segment b is permanently assigned to a second converter 2b. Behind this roller table segment b, the roller table 1 has more roles, the drive power supply is not shown.
  • a sub-segment c is arranged, which is variably assigned via a switching unit 3 the two inverters 2a, 2b. Both the inverters 2a, 2b and the switching unit 3 are connected to a controller STR.
  • the sub-segment c is driven by means of switching unit 3 via no converter 2a, 2b, via only one converter 2a or 2b, or via both converters 2a and 2b. In the latter case, the inverters 2a, 2b must be set up to support a parallel operation. While the first rolling stock 5 is being transported out of the rolling stand 4, for example, the sub-segment c of the roller table remains associated with the second converter 2b.
  • the sub-segment c is again available for transporting the second rolling stock 5 'and switched to the second inverter 2b.
  • Frequency inverters with switchable parameter sets are preferably used as converters 2a, 2b. Such frequency converters are designed to support variable output loads.
  • control STR When switching the subsegment c from one inverter 2a or 2b to the other inverter 2b or 2a then takes place by means of control STR a corresponding change in the parameter sets used.
  • the outputs of the converters 2a, 2b are connected via contactors, which are arranged in the switching unit 3, with the drive units of the rollers of the variable sub-segment c. Vacuum contactors allow high switching cycles and therefore an almost unlimited switching sequence between the two converters 2a, 2b.
  • the converters 2a, 2b do not allow parallel operation, it makes sense to set up the actuation of the contactors in such a way that only one inverter 2a or 2b can necessarily be connected to the motors of the variable partial segment c. For example, this is realized by means of a suitable blocking circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Conveyors (AREA)
  • Control Of Multiple Motors (AREA)
EP11733626.3A 2010-07-29 2011-07-06 Rollgang einer walzstrasse Active EP2598264B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11733626.3A EP2598264B1 (de) 2010-07-29 2011-07-06 Rollgang einer walzstrasse

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10171182 2010-07-29
PCT/EP2011/061354 WO2012013459A1 (de) 2010-07-29 2011-07-06 Rollgang einer walzstrasse
EP11733626.3A EP2598264B1 (de) 2010-07-29 2011-07-06 Rollgang einer walzstrasse

Publications (2)

Publication Number Publication Date
EP2598264A1 EP2598264A1 (de) 2013-06-05
EP2598264B1 true EP2598264B1 (de) 2014-08-27

Family

ID=44628639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11733626.3A Active EP2598264B1 (de) 2010-07-29 2011-07-06 Rollgang einer walzstrasse

Country Status (3)

Country Link
EP (1) EP2598264B1 (zh)
CN (1) CN103002999B (zh)
WO (1) WO2012013459A1 (zh)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5794415A (en) 1981-09-30 1982-06-11 Hitachi Ltd Speed controlling device for hot rolling mill
JP3593978B2 (ja) * 2000-12-28 2004-11-24 Ｊｆｅスチール株式会社 熱延鋼帯テール部の通板方法
KR100742889B1 (ko) * 2001-09-12 2007-07-25 주식회사 포스코 열연코일 오작재 처리장치
CN1231307C (zh) * 2001-11-02 2005-12-14 北新建材(集团)有限公司 用于钢带连续冲压的生产线
FI118875B (fi) 2006-09-26 2008-04-15 Vacon Oyj Invertterien rinnankytkentä

Also Published As

Publication number Publication date
WO2012013459A1 (de) 2012-02-02
CN103002999A (zh) 2013-03-27
EP2598264A1 (de) 2013-06-05
CN103002999B (zh) 2015-04-01

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