EP0809545B1 - Walzenkalibrierung für ein rohrreduzierwalzwerk - Google Patents
Walzenkalibrierung für ein rohrreduzierwalzwerk Download PDFInfo
- Publication number
- EP0809545B1 EP0809545B1 EP96901717A EP96901717A EP0809545B1 EP 0809545 B1 EP0809545 B1 EP 0809545B1 EP 96901717 A EP96901717 A EP 96901717A EP 96901717 A EP96901717 A EP 96901717A EP 0809545 B1 EP0809545 B1 EP 0809545B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roll
- rolls
- pipe
- design system
- roll pass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 9
- 230000007704 transition Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 7
- 230000008719 thickening Effects 0.000 abstract description 5
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
Definitions
- the invention relates to a roll calibration for each of three rolls existing roll sets of a multi-stand mandrel-less tube reducing mill, where the concave caliber contours of the rollers on both caliber flanks each Roller are convexly convex.
- corner or polygon formation In pipe reducing rolling mills, especially stretch reducing rolling mills, which without Internal tool, there is an appearance resulting from the rolling process, which is referred to as corner or polygon formation.
- the inside diameter of the pipe has a shape deviating from the circular cross-section, which can be seen in Using two roller calibers as square and when using one Three-roll caliber as a hexagonal cross-sectional shape with rounded edges can describe.
- German patent step 24 48 158 A reasonable proposal in this context is described in German patent step 24 48 158.
- the known prior art proposes to approximate the deformation ratios of a roller set formed from three rollers to the deformation ratios of a roller set formed from six rollers.
- the caliber contours of the rolls are bulged on the roll flanks.
- the proposal of the prior art known from DE 24 48 158 did not take into account that the proposed caliber shape alone is not suitable for homogenizing the state of deformation.
- the aim of the present invention is based on the German patent specification 2448 158 and based on the caliber shape proposed there, the Improve roll calibration for a pipe reducing mill so that the Material flow in the pipe is influenced locally so that a lower local Pipe wall thickening when reducing at critical points along the Pipe circumference takes place and thereby thickened on the finished pipe Places to be avoided.
- the invention proposes that at known caliber contour training the size of the bulge of the caliber flanks in Direction of rolling of successive sets of rolls by constant or percentage equal Amounts increases.
- This proposal is based on the knowledge that the known one Bulging on the material flow has no effect, if not in each frame Number of successive work scaffolds due to the bulging more Reduction in the caliber flank takes place than in the caliber base or caliber jump.
- the height of the protrusion from frame to frame in the Caliber series can be increased.
- the proposal of the invention results in an advantage. that the local bulge increases the local contact pressure in each scaffold, so that a material thickening in the middle of the caliber flank is counteracted.
- the finished pipe is in the event of a polygon formation, so without using the Invention, this point in the wall thickness compared to the rest of the tube circumference enlarged.
- the proposed measures of the invention act on this thickening opposite.
- the increase in Bulge 1 to 5% of the tube wall thickness of the tubes to be rolled in the caliber corresponds.
- the apex is proposed the bulging of each caliber flank, based on the caliber base in relation to the Caliber center point of the roller set by 30 to 35 degrees in the direction of the roller jump to be moved. This measure prevents the material flow due to a bulge positioned in the middle or towards the base of the caliber is directed towards the caliber jump and there to undesirable local Wall thickening leads. If the apex of the bulge after the Proposals of the invention is moved in the direction of the caliber jump, that is If the bulge is arranged asymmetrically in the caliber flank, this becomes disruptive Effect balanced.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Control Of Metal Rolling (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Rolls And Other Rotary Bodies (AREA)
Description
Der Vorschlag des aus der DE 24 48 158 bekannten Standes der Technik hat nicht beachtet, daß die vorgeschlagene Kaliberform allein nicht zur Homogenisierung des Verformungszustandes geeignet ist. Dadurch wird bei der bekannten Lösung der Effekt der Kaliberform auf den Materialfluß falsch vorausgesagt; es kommt zu ungünstigen Spannungszuständen im Rohr während der Walzung und im Ergebnis zu am Fertigrohr anzutreffenden verdickten Stellen entlang des Rohrumfanges.
- Fig. 1
- Die Kaliberkontur einer der drei Walzen eines Walzensatzes,
- Fig. 2
- in einem Diagramm die Größe der Vorwölbung über den Gerüstplätzen
Claims (4)
- Walzenkalibrierung für die aus jeweils drei Walzen bestehenden Walzensätze eines mehrgerüstigen dornlosen Rohrreduzierwalzwerkes, bei der die konkaven Kaliberkonturen der Walzen an beiden Kaliberflanken jeder Walze konvex vorgewölbt sind,
dadurch gekennzeichnet,
daß die Größe (a) der Vorwölbung (5) der Kaliberflanken (4) mehrerer in Walzrichtung aufeinanderfolgender Walzensätze um konstante oder prozentual gleiche Beträge zunimmt. - Walzenkalibrierung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Zunahme der Vorwölbung (5) 1 bis 5 % der Rohrwanddicke der im Kaliber zu walzenden Rohre entspricht. - Walzenkalibrierung nach Anspruch 1 und 2,
dadurch gekennzeichnet,
daß der Scheitelpunkt (6) der Vorwölbungen (5) jeder Kaliberflanke (4), ausgehend vom Kalibergrund (3) und bezogen auf den Kalibermittelpunkt (7) des Walzensatzes um 30 bis 35 Grad in Richtung Walzensprung (8) verschoben angeordnet ist. - Walzenkalibrierung nach Anspruch 1 bis 3,
dadurch gekennzeichnet,
daß von den den Vorgerüsten folgenden Arbeitsgerüste (i bis i+n) eine zusammenhängende Anzahl von maximal 12 Gerüsten mit den Vorwölbungen (5) der Kaliberflanken (4) versehen ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19506858 | 1995-02-14 | ||
DE19506858A DE19506858C1 (de) | 1995-02-14 | 1995-02-14 | Walzenkalibrierung für ein Rohrreduzierwalzwerk |
PCT/DE1996/000205 WO1996025249A1 (de) | 1995-02-14 | 1996-02-02 | Walzenkalibrierung für ein rohrreduzierwalzwerk |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0809545A1 EP0809545A1 (de) | 1997-12-03 |
EP0809545B1 true EP0809545B1 (de) | 1999-04-14 |
Family
ID=7755188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96901717A Expired - Lifetime EP0809545B1 (de) | 1995-02-14 | 1996-02-02 | Walzenkalibrierung für ein rohrreduzierwalzwerk |
Country Status (10)
Country | Link |
---|---|
US (1) | US5816092A (de) |
EP (1) | EP0809545B1 (de) |
CN (1) | CN1070394C (de) |
AT (1) | ATE178816T1 (de) |
CZ (1) | CZ286696B6 (de) |
DE (2) | DE19506858C1 (de) |
ES (1) | ES2129953T3 (de) |
RU (1) | RU2117540C1 (de) |
UA (1) | UA45991C2 (de) |
WO (1) | WO1996025249A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19758107A1 (de) * | 1997-12-17 | 1999-06-24 | Mannesmann Ag | Mehrgerüstiges dornloses Streckreduzierwalzwerk |
WO2005070574A1 (ja) * | 2004-01-21 | 2005-08-04 | Sumitomo Metal Industries, Ltd. | 管の絞り圧延装置及び絞り圧延装置用ロール |
EP1731234B1 (de) * | 2004-03-29 | 2011-08-03 | Sumitomo Metal Industries, Ltd. | Rohrherstellungsverfahren zum festdurchmesserwalzen |
CN1695839B (zh) * | 2004-08-17 | 2010-07-07 | 江苏包罗铜材集团股份有限公司 | 铸锭冷穿、冷扩孔的三辊斜轧方法 |
JP4441912B2 (ja) * | 2005-03-28 | 2010-03-31 | 住友金属工業株式会社 | マンドレルミル圧延方法 |
BRPI0810055B1 (pt) * | 2007-02-08 | 2016-10-18 | Nippon Steel & Sumitomo Metal Corp | rolo raiado para um redutor e redutor |
AT507596B1 (de) * | 2008-11-20 | 2011-04-15 | Voestalpine Tubulars Gmbh & Co Kg | Verfahren und vorrichtung zur herstellung von stahlrohren mit besonderen eigenschaften |
JP5849895B2 (ja) * | 2012-08-21 | 2016-02-03 | 新日鐵住金株式会社 | 絞り圧延装置及び絞り圧延装置用ロール |
CN104550263B (zh) * | 2014-12-18 | 2017-05-10 | 天津商业大学 | 一种利用五机架连轧机生产无缝钢管的孔型设计方法 |
CN112007951B (zh) * | 2019-05-31 | 2022-08-16 | 宝山钢铁股份有限公司 | 高频直缝焊管的精成型圆管孔型的成型方法 |
CN113996663B (zh) * | 2021-12-31 | 2022-03-11 | 太原科技大学 | 无缝管张力减径工艺减径率分配修正方法及系统 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE342403C (de) * | 1919-09-06 | 1921-10-18 | Verfahren der Herstellung von ungebrannten Baustoffen | |
DE2333916C2 (de) * | 1973-07-04 | 1986-01-09 | Kocks Technik Gmbh & Co, 4010 Hilden | Kalibrierung der Walzen einer Reduzierwalzstraße für Rohre |
DE2448158C3 (de) * | 1974-10-07 | 1980-09-04 | Mannesmannroehren-Werke Ag, 4000 Duesseldorf | Auf die Verringerung der Polygonbildung im Rohrinneren ausgerichtete Walzenkalibrierung eines Rohrreduzierwalzwerkes |
IT1078828B (it) * | 1975-06-25 | 1985-05-08 | Mannesmann Roehren Werke Ag | Calibratura di un laminatoio riduttore a tre cilindri per evitare la formazione di poligoni nell interno dei tubi in occasione della laminazione riduttrice dei tubi |
DE2753267C3 (de) * | 1977-11-30 | 1980-09-18 | Kocks Technik Gmbh & Co, 4000 Duesseldorf | Stoßbank zum Herstellen von Rohrluppen |
SU1183211A1 (ru) * | 1982-06-11 | 1985-10-07 | Uralsky Nii Trubnoj Promy | Технологический инструмент редукционного стана |
SU1071335A1 (ru) * | 1982-11-03 | 1984-02-07 | Уральский научно-исследовательский институт трубной промышленности | Технологический инструмент редукционного стана |
-
1995
- 1995-02-14 DE DE19506858A patent/DE19506858C1/de not_active Expired - Fee Related
-
1996
- 1996-02-02 ES ES96901717T patent/ES2129953T3/es not_active Expired - Lifetime
- 1996-02-02 RU RU97115371A patent/RU2117540C1/ru active
- 1996-02-02 CN CN96191923A patent/CN1070394C/zh not_active Expired - Lifetime
- 1996-02-02 WO PCT/DE1996/000205 patent/WO1996025249A1/de active IP Right Grant
- 1996-02-02 EP EP96901717A patent/EP0809545B1/de not_active Expired - Lifetime
- 1996-02-02 CZ CZ19972447A patent/CZ286696B6/cs not_active IP Right Cessation
- 1996-02-02 AT AT96901717T patent/ATE178816T1/de active
- 1996-02-02 DE DE59601666T patent/DE59601666D1/de not_active Expired - Lifetime
- 1996-02-02 UA UA97063417A patent/UA45991C2/uk unknown
- 1996-02-02 US US08/913,115 patent/US5816092A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CN1070394C (zh) | 2001-09-05 |
ATE178816T1 (de) | 1999-04-15 |
CZ286696B6 (en) | 2000-06-14 |
CN1174527A (zh) | 1998-02-25 |
ES2129953T3 (es) | 1999-06-16 |
RU2117540C1 (ru) | 1998-08-20 |
DE59601666D1 (de) | 1999-05-20 |
EP0809545A1 (de) | 1997-12-03 |
WO1996025249A1 (de) | 1996-08-22 |
CZ244797A3 (en) | 1997-11-12 |
DE19506858C1 (de) | 1996-01-18 |
UA45991C2 (uk) | 2002-05-15 |
US5816092A (en) | 1998-10-06 |
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