EP1074318A2 - Method for controlling the tension of the wire between the finishing block and the following block in wire rolling mills - Google Patents
Method for controlling the tension of the wire between the finishing block and the following block in wire rolling mills Download PDFInfo
- Publication number
- EP1074318A2 EP1074318A2 EP00114720A EP00114720A EP1074318A2 EP 1074318 A2 EP1074318 A2 EP 1074318A2 EP 00114720 A EP00114720 A EP 00114720A EP 00114720 A EP00114720 A EP 00114720A EP 1074318 A2 EP1074318 A2 EP 1074318A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- block
- wire
- values
- finishing
- finishing block
- 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.)
- Withdrawn
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 5
- 238000005259 measurement Methods 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000009414 blockwork Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000012546 transfer 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
- 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
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
Definitions
- the invention relates to a method for regulating the wire tension between the finished block and postblocking of wire rolling mills, in which the speeds of the drives of the finished block and that of the postblock depending on measurements of the Thickness of the wire passing through the blocks can be variably regulated.
- Modern high-performance wire mills consist of a rough road, one or more intermediate lines and a finishing block for the Rolling stock.
- the mill stands in Vorstrasse and Eisenstrasse are proportionate heavily built and designed for high rolling pressures.
- the subsequent finishing block consists of several, usually 6 to 10 alternately Rolling units offset by approx. 90 ° from each other in the rolling line close together in a block, and their rolling units driven directly and together by a drive via a transfer case become.
- This prefabricated block is usually followed by a water cooling section with a temperature compensation section for the wire. Depending on its dimensions and quality, the cooling zones can be controlled so that even at high rolling speeds a predetermined temperature profile is reached in the wire.
- a known rolling process of the type mentioned with a rolling mill training described (EP 0 219 316 B1) provides in front of and behind the finished block means for measuring the strength of the entering the finished block and the thickness of the wire emerging from this finished block before and in addition, as drives for the finished block and the post-block, each speed-controllable Engines. There is also a wire between the finished block and the post block only touching, but not deforming, from its own speed-controllable Motor driven drive roller pair provided.
- the two devices for measuring the wire thickness in front of and behind the finished block transmit their measured values to a computer, which also includes speed values the drive motors of the finishing block and the post block and the Speed value of the drive motor of the drive roller pair are supplied.
- the computer determines the wire thickness by comparing the measurement results and behind the finished block, the elongation caused in this by the rolling process of the wire strand.
- the computer determines from the values of the acute speeds of the drive motors of the finishing block, the post block, and of the pair of driving rollers is the volume of the wire strand emerging from the finished block per unit of time and the ratio of the speeds of the drives of Ready block and post block and gives one out of these and the speed value of the Driving roller pair calculated control value for the speed of the drive of the secondary block to generate the intended train on the wire strand.
- the computer constantly compares the above-mentioned actual values with the calculated ones Values or empirical values and sets the determined values in speed control values for the drives of finished block and post block. In addition, at small wire thicknesses the speeds of the emerging from the finished block Wire too high to be within the technically limited distance between finished block and postblock enough time for a regulation to To make available.
- the invention has for its object this method, which is significant and often trouble-prone expenditure on measuring devices and computer capacity requires to improve so that the effort is reduced and the susceptibility to failure be minimized.
- This object is achieved in that the regulation of the speed of the drives of the finished block and depending on this the regulation of the speed of the drive of the post-block is effected with manipulated values based on measurements of the strength of the wire before it enters the finished block and computer processing the corresponding measured values in comparison with pre-calculated theoretical values or based on experience.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Wire Processing (AREA)
- Metal Extraction Processes (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Regelung des Drahtzuges zwischen Fertigblock und Nachblock von Drahtwalzstraßen, bei dem die Drehzahlen der Antriebe des Fertigblocks und der des Nachblocks in Abhängigkeit von Messungen der Stärke des, die Blöcke durchlaufenden Drahts veränderbar geregelt werden.The invention relates to a method for regulating the wire tension between the finished block and postblocking of wire rolling mills, in which the speeds of the drives of the finished block and that of the postblock depending on measurements of the Thickness of the wire passing through the blocks can be variably regulated.
Moderne Hochleistungs-Drahtstraßen bestehen durchweg aus einer Vorstraße, einer oder mehrerer Zwischenstraßen und aus einem Fertigwalzblock für das Walzgut. Die Walzgerüste in Vorstraße und Zwischenstraße sind dabei verhältnismäßig schwer gebaut und für entsprechend hohe Walzdrücke ausgelegt. In der Vorstraße und in der Zwischenstraße werden im allgemeinen hintereinander angeordnete Einzelgerüste mit Horizontal- Vertikalanordnung der Walzen verwendet. Der anschließende Fertigwalzblock besteht aus mehreren, meist 6 bis 10 wechselweise um ca. 90° gegeneinander versetzten Walzeinheiten, die in Walzlinie dicht hinter einander zu einem Block zusammengefaßt sind, und deren Walzeinheiten von einem Antrieb über ein Verteilergetriebe direkt und gemeinsam angetrieben werden. Diesem Fertigblock folgt meist eine Wasserkühlstrecke mit Temperaturausgleichsstrecke für den Draht. In Abhängigkeit von dessen Abmessung und Qualität lassen sich die Kühlzonen so ansteuern, daß auch bei hohen Walzgeschwindigkeiten ein vorbestimmtes Temperaturprofil in dem Draht erreicht wird. Modern high-performance wire mills consist of a rough road, one or more intermediate lines and a finishing block for the Rolling stock. The mill stands in Vorstrasse and Zwischenstrasse are proportionate heavily built and designed for high rolling pressures. In the Vorstraße and in the Zwischenstraße are generally arranged one behind the other Single stands with horizontal-vertical arrangement of the rollers used. The subsequent finishing block consists of several, usually 6 to 10 alternately Rolling units offset by approx. 90 ° from each other in the rolling line close together in a block, and their rolling units driven directly and together by a drive via a transfer case become. This prefabricated block is usually followed by a water cooling section with a temperature compensation section for the wire. Depending on its dimensions and quality, the cooling zones can be controlled so that even at high rolling speeds a predetermined temperature profile is reached in the wire.
Hinter dieser Wasserkühlstrecke folgt ein weiterer sog. Nachblock, der aus minimal zwei, maximal "n", entsprechend zu einem Block zusammengefaßten Walzeinheiten besteht. Mit dieser Anordnung läßt sich die Gesamtstichabnahme der Walzstraße erhöhen, und es können dünnere Fertigabmessungen erzeugt werden. Auch läßt sich die Endwalzgeschwindigkeit bei unverändertem Geschwindigkeitsniveau der Walzstraße steigern und das Gefüge des Drahtes durch gezielte Kühlung vor den letzten Stichen in diesem Nachwalzblock beeinflussen. Der Draht wird in dem Nachwalzblock mit, gegenüber dem Fertigwalzblock geringeren oder höheren Stichabnahme gewalzt d. h. der Nachwalzblock arbeitet als ein Präzisionswalzblock zur Erhöhung der Oberflächengüte des Drahtes.Behind this water cooling section is another so-called post-block, which consists of minimal two, maximum "n", combined into one block Rolling units exist. With this arrangement, the total stitch decrease can the rolling mill, and it can produce thinner finished dimensions become. The final rolling speed can also be maintained with the speed level unchanged the mill and increase the structure of the wire influence targeted cooling before the last passes in this roughing block. The wire is reduced in size in the finishing block compared to the finishing block or higher stitch acceptance rolled d. H. the roughing block works as a precision roller block to increase the surface quality of the wire.
Ein bekanntes Walzverfahren der anfangs genannten Art mit einer Walzanlage der geschilderten Ausbildung (EP 0 219 316 B1) sieht jeweils vor und hinter dem Fertigblock eine Einrichtung zur Messung der Stärke des, in den Fertigblock eintretenden und der Stärke des aus diesem Fertigblock austretenden Drahtes vor und dazu als Antriebe für den Fertigblock und den Nachblock jeweils drehzahlregelbare Motoren. Des weiteren ist zwischen Fertigblock und Nachblock ein, den Draht nur berührendes, aber nicht verformendes, von einem eigenen drehzahlregelbaren Motor angetriebenes Treibrollenpaar vorgesehen.A known rolling process of the type mentioned with a rolling mill training described (EP 0 219 316 B1) provides in front of and behind the finished block means for measuring the strength of the entering the finished block and the thickness of the wire emerging from this finished block before and in addition, as drives for the finished block and the post-block, each speed-controllable Engines. There is also a wire between the finished block and the post block only touching, but not deforming, from its own speed-controllable Motor driven drive roller pair provided.
Die beiden Einrichtungen zur Messung der Drahtstärken vor und hinter dem Fertigblock übermitteln ihre Meßwerte einem Rechner, dem des weiteren auch Drehzahlwerte der Antriebsmotoren des Fertigblocks und des Nachblocks und der Drehzahlwert des Antriebsmotors des Treibrollenpaares zugeführt werden.The two devices for measuring the wire thickness in front of and behind the finished block transmit their measured values to a computer, which also includes speed values the drive motors of the finishing block and the post block and the Speed value of the drive motor of the drive roller pair are supplied.
Der Rechner ermittelt durch Vergleich der Meßergebnisse der Drahtstärken vor und hinter dem Fertigblock die, in diesem durch den Walzvorgang bewirkte Längung des Drahtstranges. Anschließend ermittelt der Rechner aus den Werten der akuten Drehzahlen der Antriebsmotoren des Fertigblocks, des Nachblocks, und des Treibrollenpaares das Volumen des aus dem Fertigblock austretenden Drahtstrangs pro Zeiteinheit und den Verhältniswert der Drehzahlen der Antriebe von Fertigblock und Nachblock und gibt einen, aus diesen und den Drehzahlwert des Treibrollenpaares errechneten Stellwert für die Drehzahl des Antriebs des Nachblocks zur Erzeugung des vorgesehenen Zugs auf den Drahtstrang vor. Der Rechner vergleicht dabei ständig die oben genannten Ist-Werte mit errechneten Werten bzw. Erfahrungswerten und setzt die ermittelten Werte in Drehzahlstellwerte für die Antriebe von Fertigblock und Nachblock um. Darüber hinaus sind bei kleinen Drahtstärken die Geschwindigkeiten des aus dem Fertigblock austretenden Drahtes zu hoch, um innerhalb des, technisch bedingten begrenzten Abstandes zwischen Fertigblock und Nachblock genügend Zeit für eine Regelung zur Verfügung zu stellen.The computer determines the wire thickness by comparing the measurement results and behind the finished block, the elongation caused in this by the rolling process of the wire strand. The computer then determines from the values of the acute speeds of the drive motors of the finishing block, the post block, and of the pair of driving rollers is the volume of the wire strand emerging from the finished block per unit of time and the ratio of the speeds of the drives of Ready block and post block and gives one out of these and the speed value of the Driving roller pair calculated control value for the speed of the drive of the secondary block to generate the intended train on the wire strand. The The computer constantly compares the above-mentioned actual values with the calculated ones Values or empirical values and sets the determined values in speed control values for the drives of finished block and post block. In addition, at small wire thicknesses the speeds of the emerging from the finished block Wire too high to be within the technically limited distance between finished block and postblock enough time for a regulation to To make available.
Der Erfindung liegt die Aufgabe zugrunde, dieses Verfahren, das einen erheblichen und häufig störanfälligen Aufwand an Meßeinrichtungen und Rechnerkapazität erfordert, so zu verbessern, daß der Aufwand verringert und die Störanfälligkeit minimiert werden.The invention has for its object this method, which is significant and often trouble-prone expenditure on measuring devices and computer capacity requires to improve so that the effort is reduced and the susceptibility to failure be minimized.
Diese Aufgabe wird dadurch gelöst, daß die Regelung der Drehzahl der Antriebe des Fertigblocks und abhängig von dieser die Regelung der Drehzahlen des Antriebs des Nachblocks mit Stellwerten bewirkt wird, die auf Messungen der Stärke des Drahtes vor dessen Eintritt in den Fertigblock und Rechner-Verarbeitung der entsprechenden Meßwerte im Vergleich mit vorerrechneten theoretischen Werten oder Erfahrungswerten beruhen.This object is achieved in that the regulation of the speed of the drives of the finished block and depending on this the regulation of the speed of the drive of the post-block is effected with manipulated values based on measurements of the strength of the wire before it enters the finished block and computer processing the corresponding measured values in comparison with pre-calculated theoretical values or based on experience.
Für das erfindungsgemäße Verfahren wird jeweils nur eine Meßeinrichtung für die Drahtstärke im Bereich vor dem Fertigblock d. h. in einem Bereich noch verhältnismäßig niedriger Drahtgeschwindigkeiten und ein ebenfalls verhältnismäßig kleiner Rechner benötigt, der nur eine Meßwertreihe mit vorgegebenen Festwerten vergleicht.Only one measuring device for the Wire thickness in the area in front of the finished block d. H. still proportionate in one area lower wire speeds and also proportionate requires a small computer that only has a series of measured values with predefined fixed values compares.
Claims (1)
dadurch gekennzeichnet,
daß die Regelung der Drehzahlen des Antriebs des Fertigblocks und abhängig von dieser die Regelung der Drehzahlen des Antriebs des Nachblocks mit Stellwerten bewirkt wird, die auf Messungen des Drahts vor dessen Eintritt in den Fertigblock und Rechner-Bearbeitung der entsprechenden Meßwerte im Vergleich mit vorerrechneten, theoretischen Werten oder Erfahrungs-Werten beruhen.Method for regulating the wire tension between the finishing block and post-block of wire rolling mills, in which the rotational speeds of the drives of the finishing block and the post-block are regulated in dependence on measurements of the thickness of the wire passing through the blocks,
characterized,
that the regulation of the speeds of the drive of the finishing block and, depending on this, the regulation of the speeds of the driving of the finishing block is effected with manipulated values, based on measurements of the wire before its entry into the finishing block and computer processing of the corresponding measured values in comparison with pre-calculated, theoretical Values or experience values.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19936140 | 1999-07-31 | ||
| DE1999136140 DE19936140A1 (en) | 1999-07-31 | 1999-07-31 | Process for regulating the wire tension between the finished block and post block in wire rolling mills |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1074318A2 true EP1074318A2 (en) | 2001-02-07 |
| EP1074318A3 EP1074318A3 (en) | 2003-09-17 |
Family
ID=7916781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00114720A Withdrawn EP1074318A3 (en) | 1999-07-31 | 2000-07-08 | Method for controlling the tension of the wire between the finishing block and the following block in wire rolling mills |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1074318A3 (en) |
| BR (1) | BR0003203A (en) |
| DE (1) | DE19936140A1 (en) |
| MX (1) | MXPA00007444A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1452062A1 (en) * | 1965-01-15 | 1969-10-30 | Schloemann Ag | Method for controlling the cross-sectional dimensions in the continuous rolling of wire or fine steel |
| US4665730A (en) * | 1985-10-09 | 1987-05-19 | Morgan Construction Company | Method of controlling product tension in a rolling mill |
| US5305624A (en) * | 1991-05-22 | 1994-04-26 | Mannesmann Aktiengesellschaft A Corp. Of The Federal Republic Of Germany | Sizing-stand group |
| EP0920926A1 (en) * | 1997-12-04 | 1999-06-09 | Centro Automation Spa | Method to control the drawing of the rolled stock |
-
1999
- 1999-07-31 DE DE1999136140 patent/DE19936140A1/en not_active Withdrawn
-
2000
- 2000-07-08 EP EP00114720A patent/EP1074318A3/en not_active Withdrawn
- 2000-07-28 MX MXPA00007444 patent/MXPA00007444A/en unknown
- 2000-07-28 BR BR0003203-4A patent/BR0003203A/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1452062A1 (en) * | 1965-01-15 | 1969-10-30 | Schloemann Ag | Method for controlling the cross-sectional dimensions in the continuous rolling of wire or fine steel |
| US4665730A (en) * | 1985-10-09 | 1987-05-19 | Morgan Construction Company | Method of controlling product tension in a rolling mill |
| US5305624A (en) * | 1991-05-22 | 1994-04-26 | Mannesmann Aktiengesellschaft A Corp. Of The Federal Republic Of Germany | Sizing-stand group |
| EP0920926A1 (en) * | 1997-12-04 | 1999-06-09 | Centro Automation Spa | Method to control the drawing of the rolled stock |
Also Published As
| Publication number | Publication date |
|---|---|
| MXPA00007444A (en) | 2002-07-22 |
| BR0003203A (en) | 2001-03-13 |
| DE19936140A1 (en) | 2001-02-01 |
| EP1074318A3 (en) | 2003-09-17 |
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