EP1901862A1 - Device for production of a seamless hollow body from steel - Google Patents

Device for production of a seamless hollow body from steel

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Publication number
EP1901862A1
EP1901862A1 EP06761695A EP06761695A EP1901862A1 EP 1901862 A1 EP1901862 A1 EP 1901862A1 EP 06761695 A EP06761695 A EP 06761695A EP 06761695 A EP06761695 A EP 06761695A EP 1901862 A1 EP1901862 A1 EP 1901862A1
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EP
European Patent Office
Prior art keywords
diameter
round block
roll
angle
block
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Granted
Application number
EP06761695A
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German (de)
French (fr)
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EP1901862B1 (en
Inventor
Rolf Kümmerling
Gunther Manig
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Vallourec Deutschland GmbH
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V&M Deutschland GmbH
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Priority to PL06761695T priority Critical patent/PL1901862T3/en
Publication of EP1901862A1 publication Critical patent/EP1901862A1/en
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Publication of EP1901862B1 publication Critical patent/EP1901862B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills

Definitions

  • the invention relates to a device for producing a seamless hollow body made of steel according to the preamble of claim 1.
  • the piercer is with his Lochungsteil in front of the narrowest cross-section of the rollers. This level is also called 'High Point 1 '
  • the point of the piercer is so in its position in front of the plane of the smallest rolling distance (level 'high point') that the hollow block produced has no internal defects.
  • the flattening part and the widening part of the " piercer " are located behind the "high point 1" . Further details are described in “Bands, plates, tubes 6" (1965), No. 4, pages 184-189.
  • the hollow block diameters are between 5% smaller and considerably larger ( ⁇ 20%) than the diameter of the solid round block used.
  • the object of the invention is to specify a device for producing a seamless hollow body from a solid round block made of steel by means of oblique rolling, with which circular blocks made of continuous casting are perforated without internal defects even with a throughput reduction of> 5%. can be.
  • This object is achieved on the basis of the preamble in conjunction with the characterizing part of claim 1 and 2, respectively.
  • the invention is not the size of the constriction (ratio Walzenabr stand to block diameter cold) for an internal fault-free punching crucial, but the compliance of a material and roll-dependent ' n deformation in front of the piercer tip. From the sizes of block and hollow block diameter, the guide and / or roll distance is calculated in accordance with the equations given. This results in the position of the piercer tip with the help of the deformation limit to be observed in front of the Lochdomspitze.
  • the determined limit shape change must be provided as a function of the cone angle with a correction factor, wherein the cone angle is defined as the angle between the rolling stock and roll axis at a transport angle of zero degrees.
  • the correction factor is 1, which increases above 1 with increasing positive cone angle (conical hole punch) up to a value ⁇ 1.3.
  • the method according to the invention closes the gap between the currently common mode of operation and the method protected in DE 33 269 46 C1 and is applicable both to a two-roll slanting mill and to a three-roll cross-rolling mill without guideways.
  • Roller distance diameter of hollow block - 0.075 x block diameter
  • Guide distance diameter of hollow plate + 0.075 x block diameter
  • the limit shape change X in front of the piercer tip is defined as y _ /.
  • Roll abs (posltlon punch tip) s n / X- ⁇ * " diameter round block) / o
  • the allowed size X depends on the rolling mill and the material to be punched. It is recommended to choose this size so that all materials with the same size are punched.
  • the advantage of the proposed method lies in rolling mills, which produce mainly seamless tubes up to 200 mm in diameter in that continuous castable formats can be used as a starting material. As a rule, it can be perforated from strongly reducing to slightly widening with the same roll calibration. Thus, the number of required round block formats can be significantly reduced, For example, in this way, a hollow block with a diameter of 186 mm can be made from a circular block with 220 mm diameter. Usually one would have used a round block with 180 mm diameter and this easily widened. Or you could have only made a hollow block with a diameter of 210 mm from a round block with 220 mm diameter upter slight reduction.
  • a hollow block measuring 186 x 20 mm is to be produced on a two-roll cross-rolling mill.
  • the transport angle is 10 ° and the entry and exit angle is 3.5 °. This leads to a limit strain value X of 6%. Since the diameter of the round block is 220 mm, this results in a roll spacing at the position of the Lochdomspitze of 206.8 mm.
  • the device according to the invention is explained schematically on a longitudinal section.
  • the overhead biconical skewed roller 1 is shown.
  • the plane designated as high point 1 of the narrowest cross-section 2 of the oblique rollers 1 is indicated by a dashed line.
  • the end of the smoothing part 4 is in front of the 'high point 1 2 and thus also the Lochungsteil 5.
  • the Lochdornspitze 6 assumes a La ⁇ e here. which ensures that ⁇ O * ⁇
  • Characteristic is the strong diameter reduction from the diameter 8 of the round block 7 to the diameter 9 of the hollow block 10th
  • FIG. 4 shows the dependence of the correction factor on the cone angle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Metal Rolling (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Extrusion Of Metal (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The invention relates to an apparatus for making a seamless hollow body (10) from a solid round block (7) of steel with a diameter <95% of the diameter of the solid round block by means of a two-roll cross-rolling mill with a piercing mandrel (3) held between the inclined roll (1) and including a piercer (5) and at least one smoothing part (4) using pass-closing guides, or by means of a three-roll cross rolling mill with a piercing mandrel held between the inclined rolls and including a piercer and at least one smoothing part, wherein the distance of the rolls is adjusted in a particular manner at the narrowest cross-section (2) in relation to the diameter of the used round block, and the position of the piercing mandrel is adjusted in relation to the narrowest cross-section of the rollers.

Description

Vorrichtung zum Herstellen eines nahtlosen Hohlkörpers aus Stahl Apparatus for producing a seamless hollow body made of steel
Beschreibungdescription
Die Erfindung betrifft eine Vorrichtung zum Herstellen eines nahtlosen Hohlkörpers aus Stahl gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a device for producing a seamless hollow body made of steel according to the preamble of claim 1.
üblicherweise wird zur Herstellung eines nahtlosen Hohlkörpers aus einem massivem Rundblock aus Stahl durch Schrägwalzen über einen zwischen den Schrägwalzeή gehaltenen Lochdorri dieser so eingestellt, dass der Walzenabstand im engsten Querschnitt um 10 - 12" % kleiner ist als der Durchmesser des eingesetzten Ründblσckes.-Usually, to produce a seamless hollow body from a solid round block made of steel by means of oblique rolling via a Lochdorri held between the Schrägwalzeή this set so that the roll distance in the narrowest cross section by 10 - 12 " % smaller than the diameter of the Ründblσckes.- used.
Der Lochdorn steht mit seinem Lochungsteil vor dem engsten Querschnitt der Walzen. Diese Ebene wird auch 'Hoher Punkt1 genanntThe piercer is with his Lochungsteil in front of the narrowest cross-section of the rollers. This level is also called 'High Point 1 '
Die Spitze des Lochdornes steht so in seiner Lage vor der Ebene des kleinsten Walzabstandes (Ebene 'Hoher Punkt'), dass der erzeugte Hohlblock keine Innenfehler aufweist. Der Glättteil und der Aufweiteteil des" Lochdornes (falls vorhanden) befinden sich hinter dem 'Hohen Punkt1., Näheres ist in "Bänder, Bleche, Rohre 6" (1965), Nr. 4, S. 184 - 189, beschrieben.The point of the piercer is so in its position in front of the plane of the smallest rolling distance (level 'high point') that the hollow block produced has no internal defects. The flattening part and the widening part of the " piercer " (if present) are located behind the "high point 1" . Further details are described in "Bands, plates, tubes 6" (1965), No. 4, pages 184-189.
Nach diesem bekannten Verfahren sind die Hohlblockdurchmesser zwischen 5 % kleiner und erheblich größer (≥ 20 %) als der Durchmesser des eingesetzten massiven Rundblockes.According to this known method, the hollow block diameters are between 5% smaller and considerably larger (≥ 20%) than the diameter of the solid round block used.
Ein starkes reduzierendes Lochen bei fehlerfreiem Hohlblock ist nach dem bekannten Verfahren nicht möglich. Innenfehler treten insbesondere bei Rundblöcken aus Strangguss auf.A strong reducing punching in error-free hollow block is not possible by the known method. Internal faults occur in particular with round blocks made of continuous casting.
Aufgabe der Erfindung ist es eine Vorrichtung zum Herstellen eines nahtlosen Hohlkörpers aus einem massiven Rundblock aus Stahl durch Schrägwalzen anzugeben, mit der Rund- blöcke aus Strangguss auch mit einer Durchrriesserreduktion > 5 % innenfehlerfrei gelocht . werden können. Diese Aufgabe wird ausgehend vom Oberbegriff in Verbindung mit dem kennzeichnenden Teil des Anspruches 1 bzw. 2 gelöst.The object of the invention is to specify a device for producing a seamless hollow body from a solid round block made of steel by means of oblique rolling, with which circular blocks made of continuous casting are perforated without internal defects even with a throughput reduction of> 5%. can be. This object is achieved on the basis of the preamble in conjunction with the characterizing part of claim 1 and 2, respectively.
Nach der Lehre der Erfindung ist nicht die Größe der Einschnürung (Verhältnis Walzenabr stand zu Blockdurchmesser kalt) für ein innenfehlerfreies Lochen entscheidend, sondern das Einhalten einer material- und walzwerksabhängige'n Verformung vor der Lochdornspitze. Aus den Größen von Block- und Hohlblockdurchmesser wird entsprechend den angegebenen Gleichungen der Führungs- und/oder Walzenabstand berechnet. Hieraus ergibt sich mit Hilfe der einzuhaltenden Verformungsgrenze vor der Lochdomspitze die Position der Lochdornspitze.According to the teachings of the invention is not the size of the constriction (ratio Walzenabr stand to block diameter cold) for an internal fault-free punching crucial, but the compliance of a material and roll-dependent ' n deformation in front of the piercer tip. From the sizes of block and hollow block diameter, the guide and / or roll distance is calculated in accordance with the equations given. This results in the position of the piercer tip with the help of the deformation limit to be observed in front of the Lochdomspitze.
Untersuchung haben gezeigt, dass mit steigendem Transportwinkel und abfallendem Ein- laufwinkei die Grenzformänderung X ansteigt. Die Materialabhängigkeit ergibt sich aus dem Umformvermögen des verwendeten Stahls. Bei einfachen Kohlenstoffstählen ist die Grenzformänderung X größer im Vergleich zu einem schwer umzuformenden 13%-igen Chromstahl.Investigations have shown that the limit shape change X increases with increasing transport angle and decreasing inlet angle. The material dependence results from the formability of the steel used. For simple carbon steels, the limit strain X is greater compared to a 13% chromium steel that is difficult to shape.
Es hat sich außerdem gezeigt, dass die ermittelten Grenzformänderung in Abhängigkeit vom Kegelwinkel mit einem Korrekturfaktor versehen werden muss, wobei der Kegelwinkel definiert ist als Winkel zwischen Walzgut und Walzenachse bei einem Transportwinkel von Null Grad.It has also been shown that the determined limit shape change must be provided as a function of the cone angle with a correction factor, wherein the cone angle is defined as the angle between the rolling stock and roll axis at a transport angle of zero degrees.
Bei einem Kegelwinkel von Null Grad (Tonnenlocher) ist der Korrekturfaktor gleich 1, der mit steigendem positiven Kegelwinkel (Kegellocher) über 1 ansteigt bis zu einem Wert < 1,3.With a cone angle of zero degrees (barrel punch), the correction factor is 1, which increases above 1 with increasing positive cone angle (conical hole punch) up to a value <1.3.
Bei Verwendung eines Drei-Walzen-Schrägwalzwerkes ergeben sich die gleichen zuvor geschilderten Abhängigkeiten, nur mit dem Unterschied, däss die Grenzformänderung X um mindestens den Faktor 1 ,2 größer ist im Vergleich zu einem Zwei-Walzen-Schrägwalzwerk.When using a three-roll cross rolling mill, the same dependencies described above arise, only with the difference that the limit shape change X is larger by at least a factor of 1.2 compared to a two-roll cross-rolling mill.
Die Gestaltung der Werkzeuge ist nunmehr ein Kompromiss zwischen Walzeneinlauflänge, Wälzeneinlaufwinkel, Dornlänge und Position der Lochdornspitze unter Berücksichtigung der Produktionsraridbedingungen.The design of the tools is now a compromise between Walzeneinlauflänge, Wälzeneinlaufwinkel, mandrel length and position of the mandrel tip, taking into account the production conditions Rarid.
Zum Einen muss berücksichtigt werden, dass der Glättteil des Lochdomes direkt am 'Hohen Punkt1 beginnen muss oder sogar noch im Einlaufteil der Schrägwalze liegt. Zum Anderen sollte eine gewählte Walzenkalibrierung möglichst den Gesamtbereich der notwendigen Umformungen erlauben, da ein Wechsel der Schrägwälzen zeitaufwändig ist. Das erfindungsgemäße Verfahren schließt die Lücke zwischen der heute gängigen Arbeitsweise und dem in DE 33 269 46 C1 geschützten Verfahren und ist anwendbar sowohl für ein Zwei-Walzen-Schrägwaizwerk als auch für ein Drei-Walzen-Schrägwalzwerk ohne Führungen. Für die Herstellung insbesondere dünnwandiger Hohlkörper ohne Innenfehler und mit kleiner Exzentrizität ist aus der DE 332 69 46 C1 bekannt, die Schrägwalzen auf einen Abstand im Bereich von 75 bis 60 % und die Führungen auf einen Abstand im Bereich von 85 bis 70 % des Durchmessers des eingesetzten Rundblockes einzustellen.On the one hand, it must be taken into account that the smoothing part of the hole dome must start directly at the high point 1 or even lie in the inlet part of the diagonal roller. On the other hand, a selected roll calibration should allow as much as possible the total area of the necessary transformations, since changing the skew rolls is time-consuming. The method according to the invention closes the gap between the currently common mode of operation and the method protected in DE 33 269 46 C1 and is applicable both to a two-roll slanting mill and to a three-roll cross-rolling mill without guideways. For the production of in particular thin-walled hollow body without internal defects and with small eccentricity is known from DE 332 69 46 C1, the oblique rollers to a distance in the range of 75 to 60% and the guides to a distance in the range of 85 to 70% of the diameter of set round block to set.
Die Gleichungen zur Berechnung des Walzen- und Führungsabstand lauten Zwei-Walzen-Schrägwalzwerk:The equations for calculating the roll and guide distance are two-roll cross rolling mill:
Walzenabstand = Durchmesser Hohlblock - 0,075 x Blockdurchmesser Führungsabstand = Durchmesser Hohlblpck + 0,075 x BlockdurchmesserRoller distance = diameter of hollow block - 0.075 x block diameter Guide distance = diameter of hollow plate + 0.075 x block diameter
Drei-Walzen-Schrägwalzwerk:Three-roll cross rolling mill:
Walzenabstand = 3/2 x Durchmesser Hohlblock - 1X x BlockdurchmesserRoll distance = 3/2 x diameter hollow block - 1 x x block diameter
Da sich die einzelnen Schrägwalzwerkstypen und die zu lochenden Materialien in ihrem Fließverhalten unterscheiden, gelten die zuvor genannten Gleichungen als hinreichend, um die Möglichkeiten zur Herstellung gewünschter Hohlblöcke zu überprüfen sowie Walzen und den Lochdorn in guter Näherung zu gestalten. Dabei wird unter guter Näherung eine Abweichung < 3 % im Hohlblockdurchmesser verstanden.Since the individual types of skewers and the materials to be punched differ in their flow behavior, the aforementioned equations are considered to be sufficient to check the possibilities for producing desired hollow blocks and to design rolls and the piercing pin in a good approximation. By good approximation, a deviation of <3% in the hollow block diameter is understood.
Wesentlich ist, dass bei der Feinkorrektur Walzen- und Führungsabstand sowie Lochdornform geändert werden dürfen, die kritische Abnahme vor der Lochdόmspitze jedoch nicht überschritten werden darf. Die Grenzformänderung X vor der Lochdornspitze ist definiert als y_ / . Walzenabs tan d(PosltlonLochdornspitze) sn/ X-=\ * " DurchmesserRundblock ) /o It is essential that during the fine correction, the roll and guide clearance as well as the punch mandrel shape may be changed, but the critical decrease in front of the hole tip may not be exceeded. The limit shape change X in front of the piercer tip is defined as y _ /. Roll abs (posltlon punch tip) s n / X- = \ * " diameter round block) / o
Wie bereits erwähnt, hängt die erlaubte Größe X ab vom Walzwerk und dem zu lochenden Material. Es ist zu empfehlen diese Größe so zu wählen, dass alle Materialien mit der gleichen Größe gelocht werden.As already mentioned, the allowed size X depends on the rolling mill and the material to be punched. It is recommended to choose this size so that all materials with the same size are punched.
Der Vorteil des vorgeschlagenen Verfahrens liegt bei Walzwerken, die überwiegend nahtlose Rohre bis 200 mm Durchmesser erzeugen darin, dass stranggussfähige Formate als Vormaterial eingesetzt werden können. Es kann im Regelfall mit der gleichen Walzenkalibrierung von stark reduzierend bis leicht aufweitend gelocht werden. Damit lässt, sich die Anzahl der erforderlichen Rundblockformate deutlich reduzieren, Beispielsweise kann auf diese Weise ein Hohlblock mit einem Durchmesser von 186 mm aus einem Rundblock mit 220 mm Durchmesser hergestellt werden. Üblicherweise hätte man dafür einen Rundblock mit 180 mm Durchmesser eingesetzt und diesen leicht aufgeweitet. Oder man hätte aus einem Rundblock mit 220 mm Durchmesser upter leichter Reduktion nur einen Hohlblock mit 210 mm Durchmesser erzeugen können.The advantage of the proposed method lies in rolling mills, which produce mainly seamless tubes up to 200 mm in diameter in that continuous castable formats can be used as a starting material. As a rule, it can be perforated from strongly reducing to slightly widening with the same roll calibration. Thus, the number of required round block formats can be significantly reduced, For example, in this way, a hollow block with a diameter of 186 mm can be made from a circular block with 220 mm diameter. Usually one would have used a round block with 180 mm diameter and this easily widened. Or you could have only made a hollow block with a diameter of 210 mm from a round block with 220 mm diameter upter slight reduction.
Anhand eines Beispiels wird die Ermittlung des Walzen- und Führungsabstandes unter Einhaltung einer bestimmten Grenzformänderung X erläutert.By way of example, the determination of the roll and guide spacing is explained while maintaining a certain limit shape change X.
Ausgehend von einem Rundblock aus einer Stahlgüte St 52 mit einem Durchmesser von 220 mm soll auf einem Zwei-Walzen-Schrägwalzwerk ein Hohlblock der Abmessung 186 x 20 mm erzeugt werden. Das Verhältnis von Hohlbiockdurchmesser zu Rundblockdurch-Based on a round block made of steel grade St 52 with a diameter of 220 mm, a hollow block measuring 186 x 20 mm is to be produced on a two-roll cross-rolling mill. The ratio of hollow box diameter to round block diameter
186 messer ergibt einen Wert von rrr a 0,84, der wie angegeben, weit unterhalb des bis dahin üblichen Wertes von minimal 0,95 liegt. Für das Zwei-Walzen-Schrägwalzwerk wird in diesem Beispiel ein Tonnenlocher mit Führungslineaien verwendet.186 knives gives a value of rrr a 0.84, which as stated, far below the usual value of 0.95. For the two-roll cross-rolling mill, a barrel punch with guide liners is used in this example.
Wie schon zuvor ausgeführt, bedeutet dies, dass der Korrekturfaktor gleich 1 ist. Der Transportwinkel beträgt 10° und der Ein- und Auslaufwinkel liegt bei 3,5°. Das führt zu einem Grenzformänderungswert X von 6%. Da der Durchmesser des Rundblockes 220 mm beträgt, ergibt sich somit ein Walzenabstand an der Position der Lochdomspitze von 206,8 mm.As stated earlier, this means that the correction factor is equal to one. The transport angle is 10 ° and the entry and exit angle is 3.5 °. This leads to a limit strain value X of 6%. Since the diameter of the round block is 220 mm, this results in a roll spacing at the position of the Lochdomspitze of 206.8 mm.
Der Walzenabstand im 'Hohen Punkt1 ergibt sich zu 186 mm - 0,075 x 220 = 169,5 mm und der Führuήgsabstand 186 mm + 0,075 x 220 = 202,5 mm.The roll distance in the high point 1 results to 186 mm - 0.075 x 220 = 169.5 mm and the guide distance 186 mm + 0.075 x 220 = 202.5 mm.
Die erfindungsgemäße Vorrichtung wird schematisch an einem Längsschnitt erläutert. In dem hier vorliegenden halbseitigen Längsschnitt ist vom Schrägwalzwerk nur die oben liegende doppelkonische Schrägwalze 1 dargestellt. Die dazugehörige zweite Schrägwalze sowie die bei einem Zwei-Walzen-Schrägwalzwerk in der anderen Ebene liegenden kaliberschließenden Führungen, seien es Führungslineale oder Diescherscheiben, wurden hier der Einfachheit halber weggelassen.The device according to the invention is explained schematically on a longitudinal section. In the present here half-sided longitudinal section of the cross rolling mill only the overhead biconical skewed roller 1 is shown. The associated second skew roll as well as the caliber closing guides in a two-roll cross rolling mill in the other plane, be they guide rulers or die disks, have been omitted here for the sake of simplicity.
Die als 'Hoher Punkt1 bezeichnet Ebene des engsten Querschnittes 2 der Schrägwalzen 1 ist durch eine gestrichelte Linie gekennzeichnet.The plane designated as high point 1 of the narrowest cross-section 2 of the oblique rollers 1 is indicated by a dashed line.
Deutlich zu erkennen ist die im ersten Beispiel (Figur 1) ansonsten unübiiche Lage des Lochdornes 3. Das Ende des Glättteiles 4 steht vor dem 'Hohen Punkt1 2 und somit auch der Lochungsteil 5. Die Lochdornspitze 6 nimmt dabei eine Laαe ein. die sicherstellt, dass ~ O *■ The end of the smoothing part 4 is in front of the 'high point 1 2 and thus also the Lochungsteil 5. The Lochdornspitze 6 assumes a Laαe here. which ensures that ~ O * ■
im Einlaufbereich des Rundblocks die genannte Grenzformänderung X eingehalten wird und der Rundblock 7 fehlerfrei gelocht wird.in the inlet region of the round block said boundary shape change X is maintained and the round block 7 is punched without errors.
Kennzeichnend ist die starke Durchmesserreduktion vom Durchmesser 8 des Rundblocks 7 auf den Durchmesser 9 des Hohlblockes 10.Characteristic is the strong diameter reduction from the diameter 8 of the round block 7 to the diameter 9 of the hollow block 10th
Verändert man den Einlaufwinkel der Walze wie im zweiten Beispiel (Figur 2) dargestellt, iässt sich unter Beibehaltung der erlaubten Verformung vor der Lochdornspitze zeigen, dass sich auch durch eine Stellung des Glättteiles des Lochdornes hinter dem 'Hohen Punkt' ein entsprechender Hohlblpck mit reduziertem Durchmesser herstellen Iässt. Entsprechend der Darstellung in Figur 3 führt der größere Einlaufwinkel zu einer etwas kleineren Grenzformänderung X.If the entry angle of the roller is changed as shown in the second example (FIG. 2), while maintaining the permitted deformation in front of the piercer tip, it can also be shown that a position of the smoothing part of the piercer behind the 'high point' results in a corresponding hollow block with a reduced diameter make eats. Corresponding to the illustration in FIG. 3, the larger entry angle leads to a somewhat smaller limit shape change X.
Figur 4 zeigt die Abhängigkeit des Korrekturfaktors vom Kegelwinkel. FIG. 4 shows the dependence of the correction factor on the cone angle.

Claims

Patentansprüche claims
1. Vorrichtung zum Herstellen eines nahtlosen Hohlkörpers aus einem massivem Rundblock aus Stahl mit einem Durchmesser < 95 % des massiven Rupdblockdurchmessers durch ein Zwei-Walzen-Schrägwalzwerk über einen zwischen den Schrägwalzen gehaltenen einen Lochungsteil und mindestens einen Glättteil aufweisenden. Lochdorn unter Verwendung von kaliberschließenden Führungen, wobei der Abstand der Walzen im engsten Querschnitt in Relation zum Durchmesser des eingesetzten Rundblockes und die Lage des Lochdornes in Bezug auf den engsten Querschnitt der Walzen eingestellt ist dadurch gekennzeichnet, dass der einlaufende massive Rundblock vor der Spitze des Lochdornes eine vom Umformvermögen des verwendeten Stahls, vom eingestellten Transportwinkel sowie vom Einlaufwinkel der Walzen abhängige Gren∑formänderung X einhält und die Werkzeugabstände in guter Näherung über die Gleichungen1. A device for producing a seamless hollow body of a solid round block made of steel with a diameter <95% of solid Rupdblockdurchmessers by a two-roll cross rolling mill on a held between the inclined rolls a punching member and at least one smoothing part. Mandrel using caliber-closing guides, wherein the distance between the rollers in the narrowest cross-section in relation to the diameter of the inserted round block and the position of the piercer is adjusted with respect to the narrowest cross-section of the rollers, characterized in that the incoming solid round block in front of the tip of the piercing mandrel adheres to a size change X dependent on the formability of the steel used, the set transport angle and the entry angle of the rolls, and the tool distances are approximated by the equations
Walzenabstand = Durchmesser Hohlblock - 0,075 x Durchmesser Rundblock.Roll distance = diameter hollow block - 0.075 x diameter round block.
Führungsabständ = Durchmesser Hohlblock + 0,075 x Durchmesser Rundblock ermittelt werden, wobei die Grenzformänderung X definiert ist als (1 - Walzenabstand an der Position Lochdornspitze zu Durchmesser des Rundblockes) in %.Guide distances = diameter of hollow block + 0.075 x diameter round block are determined, whereby the limit change X is defined as (1 - roll distance at the position of piercer tip to diameter of the round block) in%.
2. Vorrichtung zum Herstellen eines nahtlosen Hohlkörpers aus massivem Rundblock aus Stahl mit einem Durchmesser < 95 % des massiven Rundblockdurchmessers durch ein Drei-Walzen-Schrägwalzwerk über einen zwischen den Schrägwalzen gehaltenen einen Lochungsteil und mindestens einen Glätteil aufweisenden Lochdorn, wobei der Abstand der Walzen im engsten Querschnitt in Relation zum Durchmesser des eingesetzten Rund- . blocks und die Lage des Lochdoms in Bezug auf den engsten Querschnitt der Walzen eingestellt ist dadurch gekennzeichnet, dass der einlaufende massive Rundblock vor der Spitze des Lochdornes eine vom Umformvermögen des verwendeten Stahles, vom eingestellten Transportwinkel sowie vom Einlaufwinkel der Walzen abhängige Grenzformänderung X einhält und die Werkzeugabstände in guter Näherung über die Gleichung2. Apparatus for producing a seamless hollow body of solid round block made of steel with a diameter <95% of the solid round block diameter by a three-roll cross rolling mill via a held between the inclined rolls a punching member and at least one Glätteil having perforated mandrel, wherein the distance between the rollers narrowest cross section in relation to the diameter of the inserted round. blocks and the position of the hole dome is set with respect to the narrowest cross section of the rollers, characterized in that the incoming solid round block before the top of the piercing mandrel adheres to the Umformvermögen of the steel used, the set transport angle and the entry angle of the rolls limit shape change X and the Tool distances in good approximation via the equation
Walzenabstand ~ 3/2 x Durchmesser Hohlblock - Vk x Durchmesser Rundblock ermittelt wird, wobei die Grenzformänderung X definiert ist als (1 - Walzenabstand an der Position Lochdornspitze zu Durchmesser des Rundblockes) in %. Roll distance ~ 3/2 x diameter Hollow block - Vk x diameter Round block is determined, whereby the limit change X is defined as (1 - roll distance at the position of punch tip to diameter of the round block) in%.
3. Vorrichtung nach Anspruch 1 oder 2 dadurch gekennzeichnet, dass mit steigendem Transportwinkel und abfallendem Einlaufwinkel die Grenzformänderung X ansteigt.3. Apparatus according to claim 1 or 2, characterized in that with increasing transport angle and sloping inlet angle, the limit shape change X increases.
4. Vorrichtung nach einem der Ansprüche 1 .- 3 dadurch gekennzeichnet, dass mit sinkendem Umformvermögen die Grenzformänderung X geringer wird.4. Device according to one of claims 1 .- 3, characterized in that with decreasing forming capacity, the limit shape change X is lower.
5. Vorrichtung nach einem der Ansprüche 1 - 4 dadurch gekennzeichnet, dass die ermittelte Grenzformänderung X in Abhängigkeit vom Kegelwinkel mit einem Korrekturfaktor zu versehen ist, wobei der Kegelwinkel definiert ist als Winkel zwischen Walzgut und Walzenachse bei einem Transportwinkel von Null Grad5. Device according to one of claims 1-4, characterized in that the determined limit shape change X is to be provided as a function of the cone angle with a correction factor, wherein the cone angle is defined as the angle between the rolling stock and roll axis at a transport angle of zero degrees
6. Vorrichtung nach Anspruch 5 dadurch gekennzeichnet, dass bei einem Kegelwinkel von Null Grad der Korrekturfaktor gleich 1 ist und mit steigendem positiven Kegelwinkel der Korrekturfaktor größer 1 ist bis zu einem Wert <1 ,3.6. Apparatus according to claim 5, characterized in that at a cone angle of zero degrees, the correction factor is 1 and with increasing positive cone angle, the correction factor is greater than 1 up to a value <1, 3rd
7. Vorrichtung nach einem der Ansprüche 2 - 6 dadurch gekennzeichnet, dass bei einem Drei-Walzen-Schrägwalzwerk bei ansonsten gleichen Abhängigkeiten die Grenzformänderung X mindestens um einen Faktor 1,2 größer ist im Vergleich zu einem Zwei-Walzen-Schrägwalzwerk,7. Device according to one of claims 2-6, characterized in that in a three-roll cross-rolling mill with otherwise identical dependencies, the limit shape change X is at least a factor of 1.2 greater compared to a two-roll cross rolling mill,
8. Vorrichtung nach einem der Ansprüche 1 - 6 dadurch gekennzeichnet, dass für Wanddicken' ≤ 10 % des Hohlblockdurchmessers, in Walzrichtung gesehen der Glättteil des Lochdomes am 'Hohen Punkt' beginnt.8. Device according to one of claims 1-6, characterized in that for wall thicknesses' ≤ 10% of the hollow block diameter, as seen in the rolling direction, the smoothing portion of the hole dome begins at the 'high point'.
9. Vorrichtung nach einem der Ansprüche 1 - 7 dadurch gekennzeichnet, dass der Glättteil des Lochdornes im Einlaufteil der Schrägwalzen liegt. 9. Device according to one of claims 1-7, characterized in that the smoothing part of the piercing mandrel is in the inlet part of the oblique rolls.
EP06761695A 2005-06-16 2006-06-15 Device for production of a seamless hollow body from steel Not-in-force EP1901862B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06761695T PL1901862T3 (en) 2005-06-16 2006-06-15 Device for production of a seamless hollow body from steel

Applications Claiming Priority (2)

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DE102005028667A DE102005028667A1 (en) 2005-06-16 2005-06-16 Apparatus for producing a seamless hollow body made of steel
PCT/DE2006/001074 WO2006133696A1 (en) 2005-06-16 2006-06-15 Device for production of a seamless hollow body from steel

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EP1901862A1 true EP1901862A1 (en) 2008-03-26
EP1901862B1 EP1901862B1 (en) 2011-08-03

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EP (1) EP1901862B1 (en)
JP (1) JP5103387B2 (en)
CN (1) CN101198419B (en)
AT (1) ATE518606T1 (en)
AU (1) AU2006257519B2 (en)
BR (1) BRPI0612291B1 (en)
CA (1) CA2611870C (en)
DE (1) DE102005028667A1 (en)
EA (1) EA013888B1 (en)
ES (1) ES2370836T3 (en)
MX (1) MX2007015999A (en)
PL (1) PL1901862T3 (en)
UA (1) UA96920C2 (en)
WO (1) WO2006133696A1 (en)

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CN108405639A (en) * 2018-04-09 2018-08-17 北京科技大学 A kind of design method of Two-roll rotary rolling pipe mill big wall thickness reducing amount rolling guide plate

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CN109731924B (en) * 2019-01-23 2024-03-12 合肥市百胜科技发展股份有限公司 Adjustable guide

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CN108405639B (en) * 2018-04-09 2019-09-03 北京科技大学 A kind of Two-roll rotary rolling pipe mill big wall thickness reducing amount rolling design method of guide plate

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MX2007015999A (en) 2008-03-07
AU2006257519A1 (en) 2006-12-21
EA200800062A1 (en) 2008-06-30
US20090113970A1 (en) 2009-05-07
CN101198419B (en) 2019-08-13
WO2006133696A1 (en) 2006-12-21
JP2008543569A (en) 2008-12-04
BRPI0612291A2 (en) 2010-11-03
UA96920C2 (en) 2011-12-26
ES2370836T3 (en) 2011-12-23
US8316680B2 (en) 2012-11-27
AU2006257519B2 (en) 2011-01-27
PL1901862T3 (en) 2011-12-30
DE102005028667A1 (en) 2006-12-21
JP5103387B2 (en) 2012-12-19
EA013888B1 (en) 2010-08-30
EP1901862B1 (en) 2011-08-03
CN101198419A (en) 2008-06-11
CA2611870A1 (en) 2006-12-21
ATE518606T1 (en) 2011-08-15
CA2611870C (en) 2013-02-05
BRPI0612291B1 (en) 2019-07-02

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