EP0329132A2 - Finishing-rolling method for sections - Google Patents

Finishing-rolling method for sections Download PDF

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Publication number
EP0329132A2
EP0329132A2 EP19890102664 EP89102664A EP0329132A2 EP 0329132 A2 EP0329132 A2 EP 0329132A2 EP 19890102664 EP19890102664 EP 19890102664 EP 89102664 A EP89102664 A EP 89102664A EP 0329132 A2 EP0329132 A2 EP 0329132A2
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EP
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Prior art keywords
profile
rolling
rollers
profile sections
sections
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Granted
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EP19890102664
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German (de)
French (fr)
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EP0329132A3 (en
EP0329132B1 (en
Inventor
Horst Willeke
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Preussag Stahl AG
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Preussag Stahl AG
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Priority to AT89102664T priority Critical patent/ATE94433T1/en
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Publication of EP0329132A3 publication Critical patent/EP0329132A3/en
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    • 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
    • B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/088—H- or I-sections

Definitions

  • the invention relates to a method and a rolling stand and a rolling mill for rolling profiles according to the preambles of claims 1, 5 and 9.
  • Profiles are formed from billets, blocks or slabs in several stages and passes and then calibrated to their final dimensions.
  • the gray rolling mill with two rolling stands arranged one behind the other is still used today in rolling mills for H, I or double T profiles with dimensions of up to 1000 mm, since additional stands cause enormous tool costs.
  • the horizontal rollers / rollers process the web and the flanges at the same time, two vertical rollers finish the flanges from the outside.
  • the puppet principle has so far not undergone any improvements, so that even newer rolling mills with modified technologies (DE-OS 29 36 680, DE-OS 35 21 949), which for the avoidance of a web center misalignment with symmetrical profiles by biaxial guidance of the profile, unfold the Apply flanges.
  • Folding out has the further advantage that the incision depth in the forming rolls can be kept low and these can therefore be reworked more often and can be designed for a longer service life.
  • Both the gray principle and the doll method have major disadvantages in the production of parallel-flange carriers.
  • the advantage of the gray principle of not being able to use many rollers is partially offset by the large amount of frictional wear on the forming rollers and the large relative speeds between the rolling stock flanges and the forming surfaces of the rollers.
  • the number of regrinds is limited by the deeply cut caliber shape, since the rollers cannot have any diameter. This frictional wear is considerably less with the doll process for beams and with production processes for other profiles, but at least one complete finishing stand must be installed for the final folding (folding calibration) of the outer profile sections.
  • the customary finishing stand must be arranged at a distance of more than one length of rolling stock behind the last upsetting stand, as a result of which such a rolling mill requires a large amount of space.
  • the method according to the invention enables a material-calibrated folding calibration of profiles after the last upsetting stitch and can be integrated on-line in a rolling mill.
  • the process can be used in continuous rolling mills as well as reversing rolling mills for the final, non-compressive forming of profiles. There are no relative speeds between the tool (caliber roll) and the rolling stock; this reduces tool wear to a minimum.
  • essentially cylindrical rollers or rollers are used, which can be designed in such a way that profiles of different widths can be calibrated in a folding manner. This leads to a reduction in the caliber rolls to be kept.
  • Both solution variants according to the invention are characterized in that the first profile section - in the case of H profiles, for example, the web - is not deformed by upsetting or buckling / bending or loses its dimensional accuracy because this profile section does not have to undergo any significant deformation.
  • the known "drawing empty” or incomplete folding of the second profile sections or flanges in the region of the transition between the profile sections is avoided. Folding out only a part of the later again folding-calibrating profile section supports this procedural measure.
  • the solution according to the invention to support the first profile sections during the folding calibration, enables the use of the conventional universal roll stands without the acquisition of new roll sets.
  • the upper and lower rollers previously used, for example, in the production of H-profiles are only exchanged for narrower upper and lower rollers of the next smaller profile height, which do not touch the flanges. This is an astonishingly simple solution for the previously wear-prone folding calibration of large profiles.
  • Adjacent second profile sections that are to be folded into a rolling plane can be formed with a pressure roller.
  • Profile sections that can be folded symmetrically should be calibrated at the same time; This results in a balance of forces between the three-roller bending systems arranged on both sides of the profile when finishing H, I, U and double-T profiles with the same flange geometry.
  • At least one pressure roller which can be adjusted in the direction of the roller plane, with a counter roller lying in front and behind, is required for each profile section to be calibrated.
  • the support rollers can be made very small because they only have to absorb the reaction forces.
  • the axes of the support rollers can be rigidly aligned in accordance with the profile to be rolled, while the pressure roller is designed to be adjustable depending on the rolling stock material, profile thickness and folding angle.
  • the pressure roller must be arranged on the profile side to which the profile sections to be calibrated are folded out. For most symmetrical profiles, it is therefore advisable to fold adjacent profile sections with a pressure roller.
  • the feed drive for the profile can also be dimensioned small.
  • a drive can be coupled to the pressure roller.
  • one or more of the support rollers can also be provided with a traction or thrust drive.
  • the three-roll bending roll stand can be arranged directly behind the last upsetting rolls. In reversing rolling mills, the three-roll bending mill stand is swung into the rolling plane from a rest position after the penultimate compression stitch.
  • the finish-rolling stands for folding up the profiles have been arranged one roll length behind the last upsetting stand.
  • the new process enables a drive-free folding calibration by taking advantage of the forced feed of the profile through the last compression frame. Only the end of the profile has to be conveyed further after leaving the upsetting stand by means of a switchable drive on the three-roller bending roll stand or by a separate driver. This arrangement makes it possible to make rolling mills shorter by one length of rolling stock.
  • a double-T profile 1 of 500 mm high with 15 mm thick web 3 and 28 mm thick flanges 2 was rolled out in the last compression frame of a rolling mill, not shown, to a nominal flange width of 300 mm (FIG. 1).
  • the flange sections 2 b were unfolded during the reversing operation, so that the side rolls of the compression frame, which were complementary to the flange sections 2 a, 2 b, could guide the profile 1 in the middle during the rolling process.
  • the profile 1 was fed to the three-roll bending mill (Fig. 2).
  • an essentially cylindrical pressure roller 4, 5 is arranged on both outer sides of the profile 1, with axes 1 1, 10 perpendicular to the rolling direction Z and to the axial direction X - Y.
  • Both pressure rollers 4, 5 are provided with commercially available electric drives, not shown, which drive the pressure rollers 4, 5 according to the direction of rotation shown on axis 10 and cause the delivery of the pressure rollers 4, 5 in the X and Y directions.
  • a symmetrically designed three-roll bending mill stand with the pressure roller 5 and the counter-rollers 8, 18 and 9, 19 is arranged on the rigid axes 14 and 15, respectively.
  • the perspective view clearly shows the folding calibration process of the flange section 2 b in the bending line B between the three rollers 5, 8, 9.
  • the finished double T-section 1 has straight, parallel flanges 2.
  • Fig. 3 shows a T-profile with web 21, the flange portions 20 are folded out symmetrically to the web 21, so that the web 21 is formed in the middle during rolling.
  • the flange sections 20 can be hingedly calibrated with a three-roll bending mill similar to that in FIG.
  • the process is not limited to symmetrical profiles; In the same way, isosceles or isosceles angle profiles or U profiles and similar rolling stock can be finished.
  • the type of roll stands is not limited to a three-roll bending roll stand; if necessary, a double system with two bending lines can be realized with two pressure rollers and three counter rollers. The principle of the three-roll bending process is thus retained.
  • FIG. 4 Another solution for the same problem is shown in FIG. 4.
  • a wide flange beam 900 mm high with parallel flange surfaces, flange width 300 mm, web thickness 20 mm and flange thickness 35 mm was rolled out with the flanges 27 a, b unfolded to the nominal dimensions mentioned.
  • the profile sections 27 a, 27 b are folded by delivering the driven pressure roller 25 (illustration on the left).
  • the finished profile with a straight flange 30 is shown to scale in the right half of FIG. 4. So that the web 29 does not buckle due to the pressure roller craters, it is supported by the top roller 23 and the bottom roller 24, leaving the 30 mm web / flange radius 28 free. In the absence of contact with the inner flange surfaces, no frictional wear can occur on the support rollers 23, 24.
  • the invention also includes very narrow support rollers 23, 24 of variable diameter, which support the first profile section or web 29 only to a small width sideways of the radius 28 and do not touch the web 29 in their central region.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

For the central rolling out of the webs or to avoid deep pass incisions of the rolls/former rolls and to avoid undercuts due to the outer portions of the section/flanges in the production of H, I, U, T, L, double T sections and similar rolled material, the trick of folding out is employed. After the upset passes the flanges are formed by folding, i.e. by a flat and edging pass, during finishing-rolling. <??>The invention proposes a new folding method in accordance with the principle of the three-roll bending method. Another solution to the same problem comprises a folding method which employs back-up rolls for the first portion of the section or web, the said rolls not touching the inner flange faces or inner faces of second portions of the section. <??>Corresponding new roll stands and rolling mills require lower levels of investment, exhibit less roll wear and have a shorter overall length. Further advantages are the smaller requirement for former rolls and lower energy consumption. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren sowie ein Walzgerüst und ein Walzwerk zum Walzen von Profilen gemäß den Oberbegriffen der Ansprüche 1, 5 und 9.The invention relates to a method and a rolling stand and a rolling mill for rolling profiles according to the preambles of claims 1, 5 and 9.

Profile werden aus Knüppeln, Blöcken oder Brammen in mehreren Arbeitsstufen und Stichen umgeformt und auf ihre Endabmessung fertigkalibriert.Profiles are formed from billets, blocks or slabs in several stages and passes and then calibrated to their final dimensions.

Seit Jahrzehnten werden auf Universalwalzstraßen die Verfahren nach Grey, Sack oder Puppe ("Die Technik des Eisenhüttenwesens¨, 5. Sonderausgabe, 1944, Verlag Stahleisen Düsseldorf, S. 177/178) angewendet.The processes according to Gray, Sack or Puppe ("Die Technik des Eisenhüttenens¨¨, 5th special edition, 1944, Verlag Stahleisen Düsseldorf, pp. 177/178) have been used on universal rolling mills for decades.

Das Grey-Walzwerk mit zwei hintereinander angeordneten Walz­gerüsten findet auch heute noch Anwendung in Walzstraßen für H-, I-oder Doppel-T-Profile mit Abmessungen bis zu 1000 mm, da weitere Gerüste enorme Werkzeugkosten verursachen. Die waagerechten Walzen/Rollen bearbeiten den Steg und die Flansche gleichzeitig, zwei senkrechte Walzen bearbeiten die Flansche von außen fertig.The gray rolling mill with two rolling stands arranged one behind the other is still used today in rolling mills for H, I or double T profiles with dimensions of up to 1000 mm, since additional stands cause enormous tool costs. The horizontal rollers / rollers process the web and the flanges at the same time, two vertical rollers finish the flanges from the outside.

Beim Puppe-Verfahren (DE-PS 254 977, DE-PS 307 856) werden die Flansche in etwas auswärts geklapptem Zustande ausgewalzt und zum Schluß in ihre Endstellung zurückgebogen. Von diesem Kunstgriff wird auch beim Walzen auf Kaliberwalzwerken Gebrauch gemacht, z. B. beim Herstellen von kleineren H-, I-, Doppel-T-Profilen (Trägern) oder U-, T-, und L-Profilen ("Hütte, Taschenbuch für Eisenhüttenleute¨, 5. Auflage, 1961, S. 767, Verlag von Wilhelm Ernst & Sohn, Berlin) oder solchen Profilen, die infolge klauen­ artiger Ausbildung oder Unterschneidungen des Profils eine unmittelbare Herstellung überhaupt nicht gestatten (DE-PS 240433).In the puppet method (DE-PS 254 977, DE-PS 307 856) the flanges are rolled out in a somewhat outwardly folded state and finally bent back into their end position. This trick is also used when rolling on caliber rolling mills, e.g. B. in the manufacture of smaller H, I, double T profiles (beams) or U, T, and L profiles ("Hütte, Taschenbuch für Eisenhüttenmens¨", 5th edition, 1961, p. 767, Verlag by Wilhelm Ernst & Sohn, Berlin) or profiles that steal as a result like training or undercuts in the profile do not allow immediate production at all (DE-PS 240433).

Das Puppe-Prinzip hat bisher keine Verbesserungen erfahren, so daß auch neuere Walzwerke mit modifizierten Technologien DE-OS 29 36 680, DE-OS 35 21 949), das für das Vermeiden eines Stegmittenversatzes bei symmetrischen Profilen durch zweiachsige Führung des Profils erforderliche Ausklappen der Flansche anwenden.
Das Ausklappen hat den weiteren Vorteil, daß die Einschnitt-Tiefe in die Formwalzen gering gehalten werden kann und diese somit häufiger nachgearbeitet und für eine größere Lebensdauer ausgelegt werden können.The puppet principle has so far not undergone any improvements, so that even newer rolling mills with modified technologies (DE-OS 29 36 680, DE-OS 35 21 949), which for the avoidance of a web center misalignment with symmetrical profiles by biaxial guidance of the profile, unfold the Apply flanges.
Folding out has the further advantage that the incision depth in the forming rolls can be kept low and these can therefore be reworked more often and can be designed for a longer service life.

Sowohl dem Grey-Prinzip als auch dem Puppe-Verfahren haften bei der Fertigung von parallelflanschigen Trägern große Nachteile an. Der Vorteil beim Grey-Prinzip, wenige Walzen verwenden zu können, wird teilweise aufgehoben durch den großen Reibverschleiß an den Formwalzen durch große Relativgeschwindigkeiten zwischen den Walzgutflanschen und den Formflächen der Walzen. Außerdem ist die Zahl der Nachschliffe durch die tief eingeschnittene Kaliberform begrenzt, da die Walzen keinen beliebig großen Durchmesser haben können.
Beim Puppe-Verfahren für Träger und bei Herstellverfahren für andere Profile ist dieser Reibverschleiß wesentlich geringer, aber es muß mindestens ein komplettes Fertiggerüst für das endgültige Anklappen (Klappkalibrieren) der äußeren Profilabschnitte installiert werden.
Bedingt durch den Reversierbetrieb der Stauchgerüste insbesondere bei großen Universalwalzwerken muß das übliche Fertiggerüst im Abstand von mehr als einer Walzgutlänge hinter dem letzten Stauchgerüst angeordnet werden, wodurch ein solches Walzwerk einen großen Platzbedarf hat.Both the gray principle and the doll method have major disadvantages in the production of parallel-flange carriers. The advantage of the gray principle of not being able to use many rollers is partially offset by the large amount of frictional wear on the forming rollers and the large relative speeds between the rolling stock flanges and the forming surfaces of the rollers. In addition, the number of regrinds is limited by the deeply cut caliber shape, since the rollers cannot have any diameter.
This frictional wear is considerably less with the doll process for beams and with production processes for other profiles, but at least one complete finishing stand must be installed for the final folding (folding calibration) of the outer profile sections.
Due to the reversing operation of the upsetting stands, particularly in the case of large universal rolling mills, the customary finishing stand must be arranged at a distance of more than one length of rolling stock behind the last upsetting stand, as a result of which such a rolling mill requires a large amount of space.

Von daher ist es die Aufgabe der Erfindung, das Fertigwalzen, insbesondere das Klappkalibrieren von Profilen, einfacher zu gestalten, den Aufwand für Kaliberwalzen/Formrollen und den Verschleiß zu reduzieren sowie den Platzbedarf für Profil­walzwerke zu verringern.It is therefore the object of the invention to make finish rolling, in particular the folding calibration of profiles, easier, to reduce the effort for caliber rolls / form rolls and wear, and to reduce the space required for profile rolling mills.

Die Aufgabe wird erfindungsgemäß durch die in den Ansprüchen 1, 2, 5, 6 und 9 genannten Merkmale gelöst.
Vorteilhafte Weiterbildungen der Erfindung sind in den Unter­ansprüchen erfaßt.The object is achieved by the features mentioned in claims 1, 2, 5, 6 and 9.
Advantageous developments of the invention are covered in the subclaims.

Das erfindungsgemäße Verfahren ermöglicht ein materialfluß­gerechtes Klappkalibrieren von Profilen nach dem letzten Stauch­stich und kann on-line in eine Walzstraße integriert werden. Das Verfahren kann sowohl in Konti-Walzwerken als auch Reversier-­Walzwerken zur abschließenden, nicht stauchenden Umformung von Profilen eingesetzt werden. Es treten keine Relativ-­Geschwindigkeiten zwischen Werkzeug (Kaliberwalze) und Walzgut auf; dadurch wird der Werkzeugverschleiß auf ein Minimum reduziert.
Bei dieser Verfahrenstechnik werden im wesentlichen zylindrische Rollen oder Walzen verwendet, die derart gestaltet werden können, daß Profile verschiedener Breite klappkalibriert werden können. Dies führt zu einer Verringerung der vorzuhaltenden Kaliberwalzen.The method according to the invention enables a material-calibrated folding calibration of profiles after the last upsetting stitch and can be integrated on-line in a rolling mill. The process can be used in continuous rolling mills as well as reversing rolling mills for the final, non-compressive forming of profiles. There are no relative speeds between the tool (caliber roll) and the rolling stock; this reduces tool wear to a minimum.
In this process technology, essentially cylindrical rollers or rollers are used, which can be designed in such a way that profiles of different widths can be calibrated in a folding manner. This leads to a reduction in the caliber rolls to be kept.

Beide erfindungsgemäßen Lösungsvarianten zeichnen sich dadurch aus, daß der erste Profilabschnitt - bei H-Profilen beispielsweise der Steg - nicht durch Stauchen oder Ausknicken/­Biegen verformt wird oder seine Maßhaltigkeit verliert, weil dieser Profilabschnitt keine wesentliche Umformung aufnehmen muß. Zugleich wird dadurch das bekannte "Leerziehen" oder unvollständige Anklappen der zweiten Profilabschnitte oder Flansche im Bereich des Uberganges zwischen den Profilabschnitten vermieden. Das Ausklappen nur eines Teiles des später wieder zu klappkalibrierenden Profilabschnittes unterstützt diese Verfahrensmaßnahme.Both solution variants according to the invention are characterized in that the first profile section - in the case of H profiles, for example, the web - is not deformed by upsetting or buckling / bending or loses its dimensional accuracy because this profile section does not have to undergo any significant deformation. At the same time, the known "drawing empty" or incomplete folding of the second profile sections or flanges in the region of the transition between the profile sections is avoided. Folding out only a part of the later again folding-calibrating profile section supports this procedural measure.

Die erfindungsgemäße Lösung, die ersten Profilabschnitte während des Klappkalibrierens zu stützen, ermöglicht die Verwendung der gebräuchlichen Universalwalzgerüste ohne Anschaffung neuer Walzensätze. Die beispielsweise in der Produktion von H-profilen bisher eingesetzten Ober- und Unterrollen werden lediglich gegen schmalere, die Flansche nicht berührende Ober- und Unterwalzen der nächst kleineren Profilhöhe ausgetauscht.
Dieses ist eine verblüffend einfache Lösung für das bisher verschleißbehaftete Klappkalibrieren großer Profile.The solution according to the invention, to support the first profile sections during the folding calibration, enables the use of the conventional universal roll stands without the acquisition of new roll sets. The upper and lower rollers previously used, for example, in the production of H-profiles are only exchanged for narrower upper and lower rollers of the next smaller profile height, which do not touch the flanges.
This is an astonishingly simple solution for the previously wear-prone folding calibration of large profiles.

Benachbarte zweite Profilabschnitte, die in eine Walzebene zu klappen sind, können mit einer Druckrolle umgeformt werden.Adjacent second profile sections that are to be folded into a rolling plane can be formed with a pressure roller.

Symmetrisch anzuklappende Profilabschnitte sollten gleichzeitig kalibriert werden; dadurch stellt sich beim Fertigwalzen von H-, I-, U- und Doppel-T-Profilen mit gleicher Flanschgeometrie auch ein Kräftegleichgewicht zwischen den beiderseits des Profiles angeordneten Drei-Rollen-Biege-Systemen ein.Profile sections that can be folded symmetrically should be calibrated at the same time; This results in a balance of forces between the three-roller bending systems arranged on both sides of the profile when finishing H, I, U and double-T profiles with the same flange geometry.

Im Prinzip wird für das Klappkalibrieren mit dem Drei-Rollen-­Biege-Verfahren je zu kalibrierendem Profilabschnitt mindestens eine in Richtung auf die Walzebene anstellbare Druckrolle mit je einer davor und dahinter liegenden Gegenrolle benötigt. Die Stützrollen können sehr klein gestaltet werden, da sie lediglich die Reaktionskräfte aufnehmen müssen. Die Achsen der Stützrollen können dem zu walzenden Profil entsprechend starr ausgerichtet sein, während die Druckrolle in Abhängigkeit von Walzgutmaterial, Profildicke und Klappwinkel anstellbar ausgebildet ist.In principle, for the folding calibration with the three-roller bending method, at least one pressure roller which can be adjusted in the direction of the roller plane, with a counter roller lying in front and behind, is required for each profile section to be calibrated. The support rollers can be made very small because they only have to absorb the reaction forces. The axes of the support rollers can be rigidly aligned in accordance with the profile to be rolled, while the pressure roller is designed to be adjustable depending on the rolling stock material, profile thickness and folding angle.

Im Gegensatz zu Warmwalzverfahren mit engen Kalibern kann somit auch eine elastische Rückfederung während des Anklappens ausgeglichen werden.In contrast to hot rolling processes with narrow calibers, elastic springback can also be compensated for during folding.

Die grundsätzliche Aussage gilt für beide erfindungsgemäßen Ausführungen der Walzgerüste für Drei-Rollen-Biege-Gerüste ebenso wie für Gerüste mit stützenden Ober- und Unterrollen für die ersten Profilabschnitte.The basic statement applies to both designs according to the invention of the roll stands for three-roll bending stands as well as for stands with supporting upper and lower rolls for the first profile sections.

Verfahrensbedingt ist die Druckrolle an der Profilseite anzuordnen, zu der die zu kalibrierenden Profilabschnitte ausgeklappt sind. Bei den meist symmetrischen Profilen empfiehlt es sich daher, benachbarte Profileabschnitte mit einer Druckrolle anzuklappen.Due to the process, the pressure roller must be arranged on the profile side to which the profile sections to be calibrated are folded out. For most symmetrical profiles, it is therefore advisable to fold adjacent profile sections with a pressure roller.

Während die Stützrollen in Drei-Rollen-Biege-Gerüsten die Reaktionskräfte quasi direkt aufnehmen, muß bei Walzgerüsten mit Ober- und Unterrollen der Steg die Druckrollenkräfte auffangen. Durch Abstützen des ersten Profilabschnittes/Steges in seinem geringsten Querschnitt, also direkt hinter dem walztechnisch notwendigen Übergangsradius vom ersten zum zweiten Profilabschnitt/Flansch, wird ein Überschreiten der Knickspannung vermieden.While the support rollers in three-roller bending stands absorb the reaction forces almost directly, in the case of roll stands with upper and lower rollers the web must absorb the pressure roller forces. By supporting the first profile section / web in its smallest cross-section, that is, directly behind the transition radius from the first to the second profile section / flange required in terms of rolling technology, an exceeding of the buckling stress is avoided.

Weil die beim erfindungsgemäßen Verfahren auftretenden Vorschubwiderstände mangels Reibung an den Rollenflanken relativ gering sind, kann auch der Vorschubantrieb für das Profil klein dimensioniert werden.
Erfindungsgemäß kann ein solcher Antrieb an die Druckrolle gekoppelt werden.
Sollte jedoch der Platz dort fehlen, beispielsweise durch die Rollenanstelleinrichtung belegt sein, kann auch eine oder mehrere der Stützrollen mit einem Zug- oder Schubantrieb versehen sein.Because the feed resistances occurring in the method according to the invention are relatively low due to the lack of friction on the roller flanks, the feed drive for the profile can also be dimensioned small.
According to the invention, such a drive can be coupled to the pressure roller.
However, if there is no space there, for example occupied by the roller adjustment device, one or more of the support rollers can also be provided with a traction or thrust drive.

Bei erfindungsgemäßen Walzwerken kann das Drei-Rollen-Biege-­Walzgerüst unmittelbar hinter den letzten Stauchrollen angeordnet werden. Bei Reversierwalzwerken wird das Drei-Rollen-Biege-­Walzgerüst nach dem vorletzten Stauchstich aus einer Ruheposition in die Walzebene eingeschwenkt.In the case of rolling mills according to the invention, the three-roll bending roll stand can be arranged directly behind the last upsetting rolls. In reversing rolling mills, the three-roll bending mill stand is swung into the rolling plane from a rest position after the penultimate compression stitch.

Bedingt durch die nicht genau definierbare Voreilung und Nacheilung des Materials während eines Stauchstiches und der damit schwierigen Geschwindigkeitssteuerung des folgenden Gerüstes, wurden bisher die Fertigwalzgerüste für das Anklappen der Profile um eine Walzgutlänge hinter dem letzten Stauchgerüst angeordnet. Das neue Verfahren gestattet eine antriebslose Klappkalibrierung, indem der zwangsweise Vorschub des Profiles durch das letzte Stauchgerüst ausgenutzt wird.
Lediglich das Profilende muß nach Verlassen des Stauchgerüstes durch einen zuschaltbaren Antrieb am Drei-Rollen-Biege-Walzgerüst oder durch einen separaten Treiber weitergefördert werden. Diese Anordnung ermöglicht es, Walzwerke um eine Walzgutlänge kürzer zu gestalten.Due to the fact that the material cannot be precisely defined and lagged during a compression stitch and the resulting difficult speed control of the following stand, the finish-rolling stands for folding up the profiles have been arranged one roll length behind the last upsetting stand. The new process enables a drive-free folding calibration by taking advantage of the forced feed of the profile through the last compression frame.
Only the end of the profile has to be conveyed further after leaving the upsetting stand by means of a switchable drive on the three-roller bending roll stand or by a separate driver. This arrangement makes it possible to make rolling mills shorter by one length of rolling stock.

Anhand schematischer Zeichnungen soll die Erfindung näher erkäutert werden.The invention will be explained in more detail with the aid of schematic drawings.

Es zeigen:

  • Fig. 1 ein Ende eines Doppel-T-Profiles mit ausgeklappten Flanschen,
  • Fig. 2 ein erfindungsgemäßes Drei-Rollen-Biege-Walzgerüst zur Durchführung des erfindungsgemäßen Verfahrens an Flanschen eines Doppel-T-Trägers gemäß Fig. 1,
  • Fig. 3 ein T-Profil mit ausgeklappten Flanschen,
  • Fig. 4 ein erfindungsgemäßes Walzgerüst mit Druckrollen und stützenden Ober- und Unterrollen.
Show it:
  • 1 shows an end of a double-T profile with flanges unfolded,
  • Fig. 2 shows a three-roll bending mill stand according to the invention for performing the method according to the invention on flanges a double-T beam according to FIG. 1,
  • 3 shows a T-profile with flanges unfolded,
  • Fig. 4 shows a roll stand according to the invention with pressure rollers and supporting upper and lower rollers.

Ein Doppel-T-Profil 1 von 500 mm Höhe mit 15 mm dickem Steg 3 und 28 mm dicken Flanschen 2 wurde im Reversierbetrieb im letzten Stauchgerüst eines nicht dargestellten Walzwerkes auf eine nominelle Flanschbreite von 300 mm ausgewalzt (Fig. 1). Zur Vermeidung eines Stegmittenversatzes waren während des Reversierbetriebes die Flanschabschnitte 2 b ausgeklappt, so daß die komplementär zu den Flanschabschnitten 2 a, 2 b konvex ausgebildeten Seitenwalzen des Stauchgerüstes das Profil 1 während des Walzprozesses mittig führen konnten.
Mit der in Fig. 1 dargestellten Kontur wurde das Profil 1 dem Drei-Rollen-Biege-Walzgerüst zugeführt (Fig. 2).A double-T profile 1 of 500 mm high with 15 mm thick web 3 and 28 mm thick flanges 2 was rolled out in the last compression frame of a rolling mill, not shown, to a nominal flange width of 300 mm (FIG. 1). To avoid a web center offset, the flange sections 2 b were unfolded during the reversing operation, so that the side rolls of the compression frame, which were complementary to the flange sections 2 a, 2 b, could guide the profile 1 in the middle during the rolling process.
With the contour shown in Fig. 1, the profile 1 was fed to the three-roll bending mill (Fig. 2).

In der Achsrichtung X - Y quer zur Walzrichtung Z ist an beiden äußeren Seiten des Profiles 1 je eine im wesentlichen zylindrische Druckrolle 4, 5 mit zur Walzrichtung Z und zur Achsrichtung X - Y senkrechten Achsen 1 1, 10 angeordnet. Beide Druckrollen 4, 5 sind mit nicht dargestellten handelsüblichen Elektro-Antrieben versehen, die die Druckrollen 4, 5 gemäß an Achse 10 dargestellter Drehrichtung antreiben und die Zustellung der Druckrollen 4, 5 in Richtung X bzw. Y bewirken.
Je zwei zylindrische Gegenrollen 6, 16 bzw. 7,17 mit starren fluchtenden Achsen 12 bzw. 13, in Walzrichtung Z vor und hinter der Druckrolle 4 angeordnet, formen die Innenseite der von der Druckrolle 4 angeklappten Flanschabschnitte 2 b.In the axial direction X - Y transverse to the rolling direction Z, an essentially cylindrical pressure roller 4, 5 is arranged on both outer sides of the profile 1, with axes 1 1, 10 perpendicular to the rolling direction Z and to the axial direction X - Y. Both pressure rollers 4, 5 are provided with commercially available electric drives, not shown, which drive the pressure rollers 4, 5 according to the direction of rotation shown on axis 10 and cause the delivery of the pressure rollers 4, 5 in the X and Y directions.
Two cylindrical counter-rollers 6, 16 and 7.17 with rigid aligned axes 12 and 13, respectively, arranged in the rolling direction Z in front of and behind the pressure roller 4, form the inside of the flange sections 2 b folded by the pressure roller 4.

Auf der gegenüberliegenden Profilseite ist ein symmetrisch ausgebildetes Drei-Rollen-Biege-Walzgerüst mit der Druckrolle 5 und den Gegenrollen 8,18 bzw. 9,19 auf den starren Achsen 14 bzw. 15 angeordnet. Die perspektivische Darstellung zeigt deutlich den Klappkalibriervorgang des Flanschabschnittes 2 b in der Biegelinie B zwischen den drei Rollen 5,8,9.
Das fertiggewalzte Doppel-T-Profil 1 hat gerade, parallele Flanschen 2.On the opposite side of the profile, a symmetrically designed three-roll bending mill stand with the pressure roller 5 and the counter-rollers 8, 18 and 9, 19 is arranged on the rigid axes 14 and 15, respectively. The perspective view clearly shows the folding calibration process of the flange section 2 b in the bending line B between the three rollers 5, 8, 9.
The finished double T-section 1 has straight, parallel flanges 2.

Fig. 3 zeigt ein T-Profil mit Steg 21, dessen Flanschabschnitte 20 symmetrisch zum Steg 21 ausgeklappt sind, damit beim Walzen der Steg 21 mittig geformt wird.
Die Flanschabschnitte 20 können mit einem Drei-Rollen-Biege-­Walzgerüst, ähnlich dem in Fig. 2, klappkalibriert werden.Fig. 3 shows a T-profile with web 21, the flange portions 20 are folded out symmetrically to the web 21, so that the web 21 is formed in the middle during rolling.
The flange sections 20 can be hingedly calibrated with a three-roll bending mill similar to that in FIG.

In allen Fällen ist ein unvollständiges Anklappen oder Leerziehen des Überganges Steg/Flansch ausgeschlossen, da die Abschnitte 2 a bzw. 22 der Profile nicht ausgeklappt waren.In all cases, incomplete folding or pulling of the web / flange transition is excluded, since sections 2 a and 22 of the profiles were not unfolded.

Das Verfahren ist nicht auf symmetrische Profile beschränkt; in gleichsinniger Weise können auch gleich- oder ungleichschenklige Winkelprofile oder U-Profile und ähnliches Walzgut fertig bearbeitet werden.
Die Art der Walzgerüste ist nicht auf ein Drei-Rollen-Biege-­Walzgerüst begrenzt; erforderlichenfalls kann ein Doppel-System mit zwei Biegelinien durch zwei Druckrollen sowie drei Gegenrollen realisiert werden. Das Prinzip des Drei-Rollen-­Biege-Verfahrens wird damit beibehalten.The process is not limited to symmetrical profiles; In the same way, isosceles or isosceles angle profiles or U profiles and similar rolling stock can be finished.
The type of roll stands is not limited to a three-roll bending roll stand; if necessary, a double system with two bending lines can be realized with two pressure rollers and three counter rollers. The principle of the three-roll bending process is thus retained.

Eine andere Lösungsform für das gleiche Problem zeigt Fig. 4. Ein Breitflanschträger von 900 mm Höhe mit parallelen Flanschflächen, Flanschbreite 300 mm, Stegdicke 20 mm und Flanschdicke 35 mm wurde mit ausgeklappten Flanschen 27 a, b auf die genannten Nominalabmessungen warm ausgewalzt. Im Fertigwalzgerüst mit dem Druckrollen 25, 26, der Oberrolle 23 und der Unterrolle 24 werden die Profilabschnitte 27 a, 27 b durch Zustellen der angetriebenen Druckrolle 25 (Darstellung links) angeklappt.Another solution for the same problem is shown in FIG. 4. A wide flange beam 900 mm high with parallel flange surfaces, flange width 300 mm, web thickness 20 mm and flange thickness 35 mm was rolled out with the flanges 27 a, b unfolded to the nominal dimensions mentioned. In the finishing mill with the pressure rollers 25, 26, the top roller 23 and the lower roller 24, the profile sections 27 a, 27 b are folded by delivering the driven pressure roller 25 (illustration on the left).

Das fertige Profil mit geradem Flansch 30 ist in der rechten Hälfte der Fig. 4 unmaßstäblich abgebildet.
Damit durch die Druckrollenkräte der Steg 29 nicht ausknickt, wird er, den 30 mm großen Steg/Flansch-Radius 28 freilassend, durch die Oberrolle 23 und die Unterrolle 24 gestützt. Mangels Berührung der inneren Flanschflächen kann kein Reibverschleiß an den Stützrollen 23, 24 auftreten. Die Erfindung umfaßt auch sehr schmale Stützrollen 23, 24 variablen Durchmesser, die den ersten Profilabschnitt bzw. Steg 29 nur in geringer Breite seitwärts des Radius 28 stützen und in ihrem Mittelbereich den Steg 29 nicht berühren.The finished profile with a straight flange 30 is shown to scale in the right half of FIG. 4.
So that the web 29 does not buckle due to the pressure roller craters, it is supported by the top roller 23 and the bottom roller 24, leaving the 30 mm web / flange radius 28 free. In the absence of contact with the inner flange surfaces, no frictional wear can occur on the support rollers 23, 24. The invention also includes very narrow support rollers 23, 24 of variable diameter, which support the first profile section or web 29 only to a small width sideways of the radius 28 and do not touch the web 29 in their central region.

Claims (11)

1. Verfahren zum Fertigwalzen von Profilen mit etwa rechtwinklig zu einem ersten Profilabschnitt angeordneten zweiten Profil­abschnitten durch Vorwalzen auf die Fertigmaße der einzelnen Profilabschnitte und anschließendes Klappkalibrieren der zweiten Profilabschnitte, dadurch gekennzeichnet, daß während des Vorwalzens nur Teile (2b, 20, 27) der zweiten Profilabschnitte (2, 20, 22 27) ausgeklappt werden und daß die zweiten Profilabschnitte (2, 20) durch Biege-Richten im Drei-Rollen-Biege-Verfahren klappkalibriert werden.1. A process for the final rolling of profiles with second profile sections arranged approximately at right angles to a first profile section by roughing to the finished dimensions of the individual profile sections and subsequent folding calibration of the second profile sections, characterized in that only parts (2b, 20, 27) of the second one during pre-rolling Profile sections (2, 20, 22 27) are folded out and that the second profile sections (2, 20) are folded-calibrated by bending-straightening in the three-roller bending process. 2. Verfahren zum Fertigwalzen von Profilen mit etwa rechtwinklig zu einem ersten Profilabschnitt angeordneten zweiten Profilabschnitten durch Vorwalzen auf die Fertigmaße der einzelnen Profilabschnitte und anschließendes Klappkalibrieren der zweiten Profilabschnitte, dadurch gekennzeichnet, daß während des Klappkalibrierens eines Teiles (2b, 20, 27) oder des ganzen zweiten Profilabschnittes (2, 20, 22, 27) der erste Profilabschnitt (3, 21, 29) in einem Abstand von 0,1 - 4mal, vorzugsweise 0,5 - 2mal, der Dicke des ersten Profilabschnittes (3, 21, 29) von dem zweiten Profilabschnitt (2, 20, 22, 27, 30) gegen Stauchen und Ausknicken gestützt wird.2. Method for finish rolling profiles with second profile sections arranged approximately at right angles to a first profile section by pre-rolling to the finished dimensions of the individual profile sections and then folding calibration of the second profile sections, characterized in that during the folding calibration of a part (2b, 20, 27) or whole second profile section (2, 20, 22, 27) the first profile section (3, 21, 29) at a distance of 0.1 - 4 times, preferably 0.5 - 2 times, the thickness of the first profile section (3, 21, 29 ) is supported by the second profile section (2, 20, 22, 27, 30) against upsetting and buckling. 3. Verfahren zum Fertigwalzen von Profilen nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß gleichzeitig zwei zweite Profilabschnitte (2b, 20, 27) gegensinnig in eine Ebene klappkalibriert werden.3. A method for finish rolling profiles according to claim 1 or 2, characterized in that at the same time two second profile sections (2b, 20, 27) are calibrated in opposite directions in one plane. 4. Verfahren zum Fertigwalzen von Profilen nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß symmetrisch an H-, I-, U-, Doppel-T-Profilen (1) angeordnete zweite Profilabschnitte (2 b,20, 27) symmetrisch gleichzeitig klappkalibriert werden.4. Process for finish rolling profiles according to claim 1 or 2, characterized in that symmetrically on H, I, U, double T profiles (1) arranged second profile sections (2 b, 20, 27) symmetrically simultaneously calibrated will. 5. Walzgerüst zur Durchführung des Verfahrens nach mindestens einem der Ansprüche 1 bis 4 mit parallel zueinander angeordneten Achsen von im Eingriff befindlichen Klappkalibrierrollen, gekennzeichnet durch jeden zweiten Profilabschnitt (2) führende Rollen (8, 9, 5; 18, 19, 5; 6, 7, 4; 16, 17, 4), von denen mindestens zwei auf einer Seite des zweiten Profilabschnittes (2) als starre Stützrollen (8, 9; 18, 19; 6, 7; 16, 17) der auf der anderen Seite des zweiten Profilabschnittes (2) zwischen den Stützrollen angeordneten anstellbaren Druckrollen (4; 5) ausgebildet sind.5. Roll stand for carrying out the method according to at least one of claims 1 to 4 with mutually parallel axes of engaged folding calibration rollers, characterized by every second profile section (2) leading rollers (8, 9, 5; 18, 19, 5; 6 , 7, 4; 16, 17, 4), of which at least two on one side of the second profile section (2) as rigid support rollers (8, 9; 18, 19; 6, 7; 16, 17) on the other side of the second profile section (2) between the support rollers arranged adjustable pressure rollers (4; 5) are formed. 6. Walzgerüst zur Durchführung des Verfahrens nach mindestens einem der Ansprüche 1 bis 4 mit parallel zueinander angeordneten Achsen von Klappkalibrierrollen und mit diesen gleichzeitig im Eingriff befindlichen Stützrollen für den ersten Profilabschnitt, dadurch gekennzeichnet, daß die Stützrollen (23, 24) schmaler als die ersten Profilabschnitte (21, 29) ausgebildet sind.6. Roll stand for performing the method according to at least one of claims 1 to 4 with mutually parallel axes of folding calibration rollers and with these simultaneously engaged support rollers for the first profile section, characterized in that the support rollers (23, 24) narrower than the first Profile sections (21, 29) are formed. 7. Walzgerüst nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Druckrolle (4, 5, 25, 26) für je zwei benachbarte gegensinnig zu klappkalibrierende Profilabschnitte (2, 20, 27, 30) ausgebildet ist.7. Roll stand according to claim 5 or 6, characterized in that the pressure roller (4, 5, 25, 26) is formed for two adjacent profile sections (2, 20, 27, 30) to be calibrated in opposite directions. 8. Walzgerüst nach mindestens einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß mindestens eine der Rollen, vorzugsweise die Druckrolle (4, 5, 25, 26), einen Antrieb aufweist.8. Roll stand according to at least one of claims 5 to 7, characterized in that at least one of the rollers, preferably the pressure roller (4, 5, 25, 26), has a drive. 9. Walzwerk zur Durchführung des Verfahrens nach mindestens einem der Ansprüche 1 bis 4 mit einer Vorblockstraße und mindestens einem Universalgerüst für das Walzen der Profilabschnitte auf Fertigmaß, dadurch gekennzeichnet, daß unmittelbar hinter den letzten Stauchrollen ein Drei-Rollen-Biege-Walzgerüst (8, 9, 5; 18, 19, 5; 6, 7, 4; 16, 17, 4) angeordnet ist.9. Rolling mill for carrying out the method according to at least one of claims 1 to 4 with a blooming mill and at least one universal stand for rolling the profile sections to a finished size, characterized in that a three-roll bending roll stand (8, 9, 5; 18, 19, 5; 6, 7, 4; 16, 17, 4) is arranged. 10. Walzwerk nach Anspruch 9, dadurch gekennzeichnet, daß das Drei-Rollen-Biege-Walzgerüst direkt an einen Ständer des letzten Gerüstes angeflanscht ist.10. Rolling mill according to claim 9, characterized in that the three-roll bending roll stand is flanged directly to a stand of the last stand. 11. Walzwerk nach den Ansprüchen 9 oder 10, dadurch gekennzeichnet, daß das Drei-Rollen-Biege-Walzgerüst aus einer Ruhestellung in eine Arbeitsposition verfahrbar ist.11. Rolling mill according to claims 9 or 10, characterized in that the three-roll bending roll stand can be moved from a rest position into a working position.
EP89102664A 1988-02-17 1989-02-16 Finishing-rolling method for sections Expired - Lifetime EP0329132B1 (en)

Priority Applications (1)

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AT89102664T ATE94433T1 (en) 1988-02-17 1989-02-16 FINISH ROLLING PROCESS FOR PROFILES.

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DE3805364A DE3805364A1 (en) 1988-02-17 1988-02-17 FINISHING ROLLING PROCESS FOR PROFILES
DE3805364 1988-02-17

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EP0329132A2 true EP0329132A2 (en) 1989-08-23
EP0329132A3 EP0329132A3 (en) 1991-01-02
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EP (1) EP0329132B1 (en)
JP (1) JPH01309702A (en)
AT (1) ATE94433T1 (en)
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ES (1) ES2043907T3 (en)

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US5241735A (en) * 1991-06-10 1993-09-07 Emerson Electric Co. Radial saw arm construction
US6604397B2 (en) 2001-02-05 2003-08-12 Dietrich Industries, Inc. Rollforming machine
US6928848B2 (en) * 2003-03-27 2005-08-16 Ford Motor Company Flanging processes with radial compression of the blank stretched surface
DE10339957B3 (en) * 2003-08-25 2005-01-13 Peiner Träger GmbH Double T-shaped strip for sheet piling has two web-linked flange sectors with connected lobe-shaped sectors
DE102008050366B4 (en) * 2008-10-02 2010-06-17 Data M Sheet Metal Solutions Gmbh System for cold rolling profiling of profiles with variable cross section
RU2584095C2 (en) * 2011-05-13 2016-05-20 Маннштет Гмбх Method and device for production of metal sections with accurate size of cavity
KR101350716B1 (en) * 2011-11-29 2014-01-14 주식회사 성우하이텍 Roll forming method and formed beam produced by using the same
JP6394408B2 (en) * 2015-01-16 2018-09-26 新日鐵住金株式会社 Intermediate universal rolling roll of H-section steel and intermediate universal rolling mill
US10603761B2 (en) 2016-06-06 2020-03-31 United Technologies Corporation Deep roll peening system and method
CN109622611B (en) * 2018-12-20 2024-03-08 山东钢铁股份有限公司 H-shaped steel with locking notch, rolling method and rolling device thereof
CN111745049B (en) * 2020-06-02 2022-06-14 广州众山精密科技有限公司 Guide rail profile machining module and guide rail profile machining method thereof
CN112246863B (en) * 2020-08-25 2023-03-17 山东润金重工科技有限公司 H-shaped steel processing method and device

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DE58905573D1 (en) 1993-10-21
EP0329132A3 (en) 1991-01-02
DE3805364A1 (en) 1989-08-31
ES2043907T3 (en) 1994-01-01
US4942753A (en) 1990-07-24
ATE94433T1 (en) 1993-10-15
JPH01309702A (en) 1989-12-14
EP0329132B1 (en) 1993-09-15

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