EP1245301A2 - Straightening device for steel - and metallic strips - Google Patents

Straightening device for steel - and metallic strips Download PDF

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Publication number
EP1245301A2
EP1245301A2 EP02002495A EP02002495A EP1245301A2 EP 1245301 A2 EP1245301 A2 EP 1245301A2 EP 02002495 A EP02002495 A EP 02002495A EP 02002495 A EP02002495 A EP 02002495A EP 1245301 A2 EP1245301 A2 EP 1245301A2
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Prior art keywords
stretching
train
zone
section
length
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EP02002495A
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German (de)
French (fr)
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EP1245301A3 (en
EP1245301B1 (en
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Andreas Dr. Noé
Rolf Dipl Ing Noé
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BWG Bergwerk und Walzwerk Maschinenbau GmbH
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BWG Bergwerk und Walzwerk Maschinenbau GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/05—Stretching combined with rolling

Definitions

  • the invention relates to a train stretching system for steel and Metal strips according to the preamble of claim 1.
  • the tension in the pre-stretching zone is increased almost to the yield point R p 0.2 , so that a slight elastoplastic pre-stretching takes place in connection with the bending action due to the finite diameter of the tensioning drums. Part or all of the flatness in the strip is corrected in the stretching zone. Theoretically, it is also conceivable to raise the belt tension in the pre-stretching zone to or above the value R p 0.2 .
  • a train stretching system with a brake roller set is also known as well as a pull roller set, being between the pull roller set and a central stretching roller a first Stretching section and between the central stretching roll and the Pull roller set a second stretch are realized (see DE 196 45 599 A1).
  • the invention has for its object a train stretching system to create, with which you can easily good steel and metal strips to be treated Get flatness results.
  • FIG. 1 shows a prior art stretching machine with rolls 1 'to 10' and with a first stretching section or pre-stretching zone R 1 and a second stretching section or post-stretching zone R 2
  • FIG. 2 shows the solution according to the invention with rolls 1 to 9, with a first stretching section or pre-stretching zone R 1 and a second stretching section or post-stretching zone R 2 and an in-line crossbow measurement M.
  • FIG. 4 shows as example 1 and FIG. 5 as Example 2 the normalized longitudinal stress as a function of half bandwidth.
  • the proposed new solution means in comparison with the previous solution (Fig. 1) a simplification in machine effort (one less role) and an improvement in the judging result.
  • the wrap angle Roll 5 only needs to be large enough to increase the strip tension by 1 - 10% without being able to transfer slip.
  • the length of a stretching zone should also not increase become large, since the degree of stretching is always the average value is over the stretching zone. Because of fluctuations in thickness and strength in the band over the band length can in the Practice local stretch level differences occur when the Stretching zone is too long.

Abstract

The tensile drawing assembly, for steel and other metal strip materials in a thickness of 0.1-4.0 mm, has an initial drawing zone (R1) with a set of brake rollers (1-4) and a powered roller (5). The powered roller and a set of drawing rollers (6-9) form a second drawing zone (R2). The length of the two drawing zones is at least 0.5 times the maximum strip width and up to at least 1000 times the maximum strip width. The brake rollers have an adjustable convex/concave contour. The in-line crossbow curvature is measured on-line for curvature correction. The drawn strip is measured on-line for flatness, for corrections to the drawing process.

Description

Die Erfindung betrifft eine Zugreckanlage für Stahl- und Metallbänder gemäß Oberbegriff des Patentanspruchs 1.The invention relates to a train stretching system for steel and Metal strips according to the preamble of claim 1.

Aus der Praxis sind Zugreckanlagen mit zwei Reckzonen bekannt (vgl. Fig. 1). Durch die Aufteilung in zwei Reckzonen wird das Planheitsergebnis gegenüber einer Reckzone verbessert, da in der ersten Reckzone bereits die Bandbreite elastisch verringert wird und so in der Nachreckzone eine über der Bandbreite gleichmäßigere Spannungsverteilung erzielt wird, die dann zu einer besseren Planlage des gerichteten Bandes führt.Train stretching systems with two stretching zones are practical known (see Fig. 1). By dividing it into two stretching zones the flatness result compared to a stretching zone improved since the bandwidth is already in the first stretching zone is reduced elastically and so in the post-stretching zone a more even voltage distribution across the bandwidth is achieved, which then leads to a better flatness of the directed tape leads.

Hierbei wird in der Vorreckzone die Bandzugspannung bis fast zur Streckgrenze Rp 0,2 erhöht, so dass in Verbindung mit der Biegewirkung aufgrund der endlichen Durchmesser der Spanntrommeln bereits eine leichte elastoplastische Vorreckung stattfindet. So wird bereits ein Teil oder die gesamte im Band vorhandene Unplanheit in der Vorreckzone korrigiert. Theoretisch ist auch denkbar, die Bandzugspannung in der Vorreckzone auf oder über den Wert Rp 0,2 anzuheben.Here, the tension in the pre-stretching zone is increased almost to the yield point R p 0.2 , so that a slight elastoplastic pre-stretching takes place in connection with the bending action due to the finite diameter of the tensioning drums. Part or all of the flatness in the strip is corrected in the stretching zone. Theoretically, it is also conceivable to raise the belt tension in the pre-stretching zone to or above the value R p 0.2 .

Außerdem kennt man eine Zugreckanlage mit einem Bremsrollensatz und einem Zugrollensatz sowie einem zwischen dem Bremsrollensatz und dem Zugrollensatz angeordneten Zugreckrollenpaar. Dabei wird zwischen dem Bremsrollensatz und dem Zugrollesatz jener Streckzug erzeugt, welcher für die elastische Verformung des durchlaufenden Bandes erforderlich ist. Die plastische Verformung des Bandes erfolgt im Zuge des Reckvorganges lediglich im Bereich des Zugreckrollenpaares. Es wird also der für die gewünschte Reckung des Bandes erforderliche Streckzug einerseits auf dem Bremsrollensatz und dem Zugrollensatz für die elastische Reckung und andererseits auf das Zugreckrollenpaar für die plastische Reckung des betreffenden Bandes aufgeteilt (vgl. DE 39 12 676 C2).You also know a train stretching system with a brake roller set and a pull roller set and one between the Brake roller set and the tension roller set arranged tension roller pair. It is between the brake roller set and the Zugrolles set that stretch that generated for the elastic deformation of the continuous belt is required. The plastic deformation of the tape takes place in the course of the stretching process only in the area of Zugreckrollenpaares. So it will be the one for the one you want Stretching of the band required stretching on the one hand the brake roller set and the pull roller set for the elastic stretching and on the other hand on the pair of stretching rollers for the plastic stretching of the band in question divided (see DE 39 12 676 C2).

Ferner kennt man eine Zugreckanlage mit einem Bremsrollensatz sowie einem Zugrollensatz, wobei zwischen dem Zugrollensatz und einer zentralen Reckwalze eine erste Reckstrecke und zwischen der zentralen Reckwalze und dem Zugrollensatz eine zweite Reckstrecke verwirklich sind (vgl. DE 196 45 599 A1).A train stretching system with a brake roller set is also known as well as a pull roller set, being between the pull roller set and a central stretching roller a first Stretching section and between the central stretching roll and the Pull roller set a second stretch are realized (see DE 196 45 599 A1).

Schließlich ist eine Streckbiegevorrichtung mit drei Streckbiegerollen bekannt, über welche das jeweilige Metallband wechselseitig geführt ist und von dem die mittlere Streckbiegerolle während des Streckbiegevorganges in das Metallband eingetaucht ist (vgl. DE 36 36 707 C2).Finally, a stretch bender with three Stretch bending rolls known about which the respective Metal band is mutually guided and of which the middle stretch bending roll during the stretch bending process is immersed in the metal strip (cf. DE 36 36 707 C2).

Der Erfindung liegt die Aufgabe zugrunde, eine Zugreckanlage zu schaffen, mit welcher sich auf einfache Weise bei den zu behandelnden Stahl- und Metallbändern gute Planheitsergebnisse erzielen lassen.The invention has for its object a train stretching system to create, with which you can easily good steel and metal strips to be treated Get flatness results.

Diese Aufgabe wird im Rahmen der Erfindung durch eine Zugreckanlage mit den Merkmalen des Patentanspruchs 1 gelöst. This object is achieved in the context of the invention by a train stretching system solved with the features of claim 1.

Theoretische Berechnungen mit dynamischen Finite Elemente Rechenmodell haben überraschenderweise ergeben, dass die Länge der Reckzonen bzw. Reckstrecken ein wesentliches Kriterium für die Gleichmäßigkeit des Restspannungsverlaufes über der Bandbreite, mithin also der Planlage ist; denn wenn die Längszugspannungen nach dem Recken über der Bandbreite konstant sind, sind die Restlängsspannungen nach Entlastung = 0 und das Band ideal plan.Theoretical calculations with dynamic finite element computing models have surprisingly shown that the length of the stretching zones or stretching sections is an essential criterion for the uniformity of the residual stress curve across the bandwidth, and therefore the flatness; because if the longitudinal tensile stresses after stretching are constant over the belt width, the residual longitudinal stresses after unloading = 0 and the belt are ideally flat.

Im Folgenden wird die Erfindung anhand der Figuren 1 bis 5 erläutert.The invention is illustrated below with reference to FIGS. 1 to 5 explained.

Während Fig. 1 eine Zugreckanlage nach dem Stand der Technik mit Rollen 1' bis 10' und mit einer ersten Reckstrecke bzw. Vorreckzone R1 und einer zweiten Reckstrecke bzw. Nachreckzone R2 zeigt, zeigt Fig. 2 die erfindungsgemäße Lösung mit Rollen 1 bis 9, mit einer ersten Reckstrecke bzw. Vorreckzone R1 und einer zweiten Reckstrecke bzw. Nachreckzone R2 sowie einer In-line Crossbowmessung M.While FIG. 1 shows a prior art stretching machine with rolls 1 'to 10' and with a first stretching section or pre-stretching zone R 1 and a second stretching section or post-stretching zone R 2 , FIG. 2 shows the solution according to the invention with rolls 1 to 9, with a first stretching section or pre-stretching zone R 1 and a second stretching section or post-stretching zone R 2 and an in-line crossbow measurement M.

Ferner zeigen die Fig. 4 als Beispiel 1 und die Fig. 5 als Beispiel 2 die normierte Längsspannung als Funktion der halben Bandbreite.Furthermore, FIG. 4 shows as example 1 and FIG. 5 as Example 2 the normalized longitudinal stress as a function of half bandwidth.

In den beiden Beispielen wird jeweils davon ausgegangen, dass das Band vor dem Recken ideal plan ist. Wie man erkennt, werden durch den Reckprozess selbst ungleichmäßige Spannungen über der Bandbreite erzeugt. Im Beispiel 1 (Figur 4) entsteht ein Spannungsunterschied von 8 MPa, entsprechend 12 J-units Unterschied in der plastischen Längsdehnung zwischen Bandmitte ("center") und Rand ("edge"). Das Band ist nach dem Recken leicht mittenwellig. Im Beispiel 1 wurde das Band in einer einzigen Reckzone der Länge 900 mm ≙ 0,56fache Bandbreite gereckt. Im Beispiel 2 (Figur 5) wurde das Band in zwei Reckzonen (1. Reckstrecke und 2. Reckstrecke) jeweils der Länge 2000 mm ≙ 1,25fache Bandbreite gereckt (Fig. 2). Hier beträgt der Spannungsunterschied nach dem Recken nur 1 MPa zwischen Mitte und Rand, entsprechend ca. 1 J-unit. Das Band ist also nahezu ideal plan.In the two examples it is assumed that that the tape is ideally flat before stretching. How one recognizes become uneven even through the stretching process Generated voltages across the bandwidth. In example 1 (Figure 4) there is a stress difference of 8 MPa, corresponding to 12 J-units difference in the plastic Longitudinal stretch between the center of the tape ("center") and the edge ( "Edge"). After stretching, the tape is slightly rippled. In example 1, the strip was in a single stretching zone Length 900 mm ≙ 0.56 times the width stretched. In example 2 (Figure 5), the belt was in two stretching zones (1st stretch and 2nd stretch) each with a length of 2000 mm ≙ 1.25 times Bandwidth stretched (Fig. 2). Here is the voltage difference after stretching only 1 MPa between middle and Edge, corresponding to approx. 1 J-unit. So the band is almost ideal plan.

Es wirkt sich also günstig auf das Richtergebnis aus, die Länge der Reckzone > 0,56 x bmax, bevorzugt 1 - 1,5 x bmax, auszuführen (bmax = maximale Bandbreite). Noch besser ist es, die Reckzonenlänge der tatsächlichen Bandbreite b anzupassen, d. h. bevorzugt 1 - 1,5 x b (Fig. 3). Dabei zeigt Fig. 3 eine Version mit einstellbarer Reckzonenlänge. Ein typischer Bandbreitenbereich ist b = 600 - 1850 mm.It therefore has a favorable effect on the result of the judgment, the length of the stretching zone> 0.56 xb max , preferably 1 - 1.5 xb max , (b max = maximum bandwidth). It is even better to adapt the stretching zone length to the actual bandwidth b, ie preferably 1 to 1.5 xb (FIG. 3). 3 shows a version with an adjustable stretching zone length. A typical bandwidth range is b = 600 - 1850 mm.

Wird das Band nur in der Zone zwischen den Rollen 4 und 5 gereckt, verbleibt im Band eine Längsrestkrümmung (Coilset) in Richtung der Biegewirkung der Rolle 5.If the belt is only in the zone between rollers 4 and 5 stretched, there remains a longitudinal curvature in the strip (coil set) in the direction of the bending action of the roll 5.

Wird das Band nur in der Zone Rolle 5 - Rolle 6 gereckt, verbleibt im Band ein Coilset in Richtung der Biegewirkung der Rolle 6.If the tape is only stretched in the zone roll 5 - roll 6, there remains a coil set in the band in the direction of the bending effect the role 6.

Wird nun in beiden Zonen gereckt, kann durch ein entsprechendes Verhältnis der Reckgrade in den beiden Zonen der Coilset zu 0 oder auf einen gewünschten anderen Wert eingestellt werden, sofern die Biegewirkung der Rolle 5 entgegengesetzt zu Rolle 6 ist. Da sich der Coilset in der Linie unter Bandzug aufgrund des Poisson-Effekts als Querkrümmung (in-line Crossbow) darstellt, kann er optisch gemessen werden und ein geschlossener Regelkreis aufgebaut werden.If stretching is now carried out in both zones, a corresponding one can be used Ratio of the degrees of stretching in the two zones of the Coilset set to 0 or to another desired value provided the bending action of the roll 5 is opposite to role 6. Since the coil set is in the Line under belt tension due to the Poisson effect as a transverse curvature (in-line crossbow), it can be optical be measured and a closed control loop is established become.

Die vorgeschlagene neue Lösung (Fig. 2) bedeutet im Vergleich mit der bisherigen Lösung (Fig. 1) eine Vereinfachung im maschinellen Aufwand (eine Rolle weniger) und eine Verbesserung im Richtergebnis. Der Umschlingungswinkel an Rolle 5 braucht nur so groß zu sein, um 1 - 10 % Bandzuganstieg ohne Schlupf übertragen zu können.The proposed new solution (Fig. 2) means in comparison with the previous solution (Fig. 1) a simplification in machine effort (one less role) and an improvement in the judging result. The wrap angle Roll 5 only needs to be large enough to increase the strip tension by 1 - 10% without being able to transfer slip.

Die Länge einer Reckzone sollte im Übrigen auch nicht zu groß werden, da ja der Streckgrad stets der Durchschnittswert über die Reckzone ist. Wegen Dicken- und Festigkeitsschwankungen im Band über die Bandlänge können in der Praxis lokale Streckgradunterschiede auftreten, wenn die Reckzone zu lang ist.Incidentally, the length of a stretching zone should also not increase become large, since the degree of stretching is always the average value is over the stretching zone. Because of fluctuations in thickness and strength in the band over the band length can in the Practice local stretch level differences occur when the Stretching zone is too long.

Claims (12)

Zugreckanlage für Stahl- und Metallbänder, insbesondere im Dickenbereich von 0,1 bis 4 mm, mit einem Bremsrollensatz (Rollen 1 - 4), welcher in Verbindung mit der angetriebenen Rolle (5) eine erste Reckstrecke bzw. Reckzone bildet, und einem Zugrollensatz (Rollen 6 - 9), welcher mit der angetriebenen Rolle (5) eine zweite Reckstrecke bzw. Reckzone bildet, dadurch gekennzeichnet, dass die Länge der ersten und zweiten Reckstrecke bzw. Reckzone jeweils mindestens das 0,5fache der maximalen Bandbreite beträgt.Tensioning system for steel and metal strips, in particular in the thickness range from 0.1 to 4 mm, with a brake roller set (rollers 1 - 4), which forms a first stretching section or stretching zone in conjunction with the driven roller (5), and a tension roller set ( Rolls 6 - 9), which forms a second stretching section or stretching zone with the driven roller (5), characterized in that the length of the first and second stretching section or stretching zone is in each case at least 0.5 times the maximum bandwidth. Zugreckanlage nach Anspruch 1, wobei die Länge der ersten und/oder zweiten Reckstrecke bzw. Reckzone jeweils maximal das 10fache der maximalen Bandbreite beträgt.Zugreckanlage according to claim 1, wherein the length of the first and / or second stretching section or stretching zone in each case is a maximum of 10 times the maximum bandwidth. Zugreckanlage nach Anspruch 1 bis 2, wobei die Länge der ersten und der zweiten Reckstrecke bzw. Reckzone das 1-2fache der maximalen Bandbreite beträgt.Zugreckanlage according to claim 1 to 2, wherein the length of the the first and the second stretching section or stretching zone Is 1-2 times the maximum bandwidth. Zugreckanlage nach Anspruch 1 bis 3, wobei der Durchmesser der Rollen (4, 5 und 6) mindestens dem 1000fachen der maximalen Banddicke entspricht.Train stretching system according to claim 1 to 3, wherein the diameter the rollers (4, 5 and 6) at least 1000 times corresponds to the maximum strip thickness. Zugreckanlage nach den Ansprüchen 1 bis 4, wobei mindestens einer der Rollen (4, 5 oder 6) als Rolle mit konkav/konvex einstellbarer Kontur ausgeführt wird. Train stretching system according to claims 1 to 4, wherein at least one of the roles (4, 5 or 6) as role with concave / convex adjustable contour is executed. Zugreckanlage nach den Ansprüchen 1 bis 5, wobei die Kontur der Rolle zonenweise über der Bandbreite einstellbar ist.Train stretching system according to claims 1 to 5, wherein the Contour of the roll adjustable in zones over the bandwidth is. Zugreckanlage nach den Ansprüchen 1 bis 6, wobei in zumindest einer Reckstrecke bzw. Reckzone eine Linearmotoreinheit angeordnet ist, mit der die Bandzugverteilung über der Bandbreite beeinflusst werden kann.Train stretching system according to claims 1 to 6, wherein in at least a stretching section or stretching zone a linear motor unit is arranged with which the band tension distribution over the bandwidth can be influenced. Zugreckanlage nach den Ansprüchen 1 bis 7, wobei die Biegerichtung der Rolle (5) entgegengesetzt zur Rolle (6) ist und die nach dem Recken verbleibende Längs- bzw. Querkrümmung im Band durch Einstellen des Verhältnisses der Reckgrade in den beiden Reckstrecken bzw. Reckzonen korrigiert werden kann.Train stretching system according to claims 1 to 7, wherein the Bending direction of the roller (5) opposite to the roller (6) and the longitudinal or transverse curvature remaining after stretching in the band by adjusting the ratio of The degree of stretching in the two stretching sections or stretching zones has been corrected can be. Zugreckanlage nach den Ansprüchen 1 bis 8, wobei die In-Line-Querkrümmung on-line gemessen wird und der Messwert als Stellgröße für einen geschlossenen Regelkreis zur Krümmungskorrektur benutzt wird.Train stretching system according to claims 1 to 8, wherein the In-line transverse curvature is measured on-line and the measured value as a manipulated variable for a closed control loop Curvature correction is used. Zugreckanlage nach den Ansprüchen 1 bis 9, wobei vor, in oder hinter den Reckstrecken bzw. Reckzonen die Planheit des Bandes on-line mit Planheitsmessungen gemessen wird und die Messwerte zur Planheitsregelung des Reckprozesses benutzt werden.Train stretching system according to claims 1 to 9, wherein flatness in or behind the stretching sections or stretching zones of the tape is measured on-line with flatness measurements and the measured values for the flatness control of the stretching process to be used. Zugreckanlage nach den Ansprüchen 1 bis 10, wobei der Umschlingungswinkel des Bandes an der Rolle (5) ≤ 180°, bevorzugt ≤ 90° beträgt. Train stretching system according to claims 1 to 10, wherein the Wrap angle of the belt on the roll (5) ≤ 180 °, is preferably ≤ 90 °. Zugreckanlage nach den Ansprüchen 1 bis 11, wobei die Länge der ersten und/oder zweiten Reckstrecke bzw. Reckzone variabel einstellbar ist, um bei einer gegebenen Bandbreite eine jeweils optimale Länge der Reckstrecken bzw. Reckzonen(n) zu erreichen.Train stretching system according to claims 1 to 11, wherein the Length of the first and / or second stretching section or stretching zone is variably adjustable to a given bandwidth an optimal length of the stretching sections or stretching zones (n) to reach.
EP02002495A 2001-03-26 2002-02-02 Straightening device for steel - and metallic strips Expired - Lifetime EP1245301B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10114883A DE10114883C1 (en) 2001-03-26 2001-03-26 Train stretching system for steel and metal strips
DE10114883 2001-03-26

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EP1245301A2 true EP1245301A2 (en) 2002-10-02
EP1245301A3 EP1245301A3 (en) 2003-05-07
EP1245301B1 EP1245301B1 (en) 2007-03-21

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US (1) US6691541B2 (en)
EP (1) EP1245301B1 (en)
AT (1) ATE357299T1 (en)
DE (2) DE10114883C1 (en)
ES (1) ES2282334T3 (en)

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EP1796858B2 (en) † 2004-10-06 2014-11-19 SMS Siemag AG Device for the continuous lengthening of a metal strip by traction
CN104624728A (en) * 2014-12-19 2015-05-20 河南北方星光机电有限责任公司 Leveling device
CN106563698A (en) * 2015-10-07 2017-04-19 财团法人金属工业研究发展中心 Metal plate thickness precision control equipment

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JP4451493B2 (en) * 2008-05-23 2010-04-14 三菱伸銅株式会社 Manufacturing method of irregular cross section

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EP1796858B2 (en) † 2004-10-06 2014-11-19 SMS Siemag AG Device for the continuous lengthening of a metal strip by traction
CN104624728A (en) * 2014-12-19 2015-05-20 河南北方星光机电有限责任公司 Leveling device
CN106563698A (en) * 2015-10-07 2017-04-19 财团法人金属工业研究发展中心 Metal plate thickness precision control equipment

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EP1245301A3 (en) 2003-05-07
US6691541B2 (en) 2004-02-17
DE50209747D1 (en) 2007-05-03
US20020157440A1 (en) 2002-10-31
ATE357299T1 (en) 2007-04-15
ES2282334T3 (en) 2007-10-16
EP1245301B1 (en) 2007-03-21
DE10114883C1 (en) 2002-10-31

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