DE2448158C3 - Roll calibration of a tube reducing mill aimed at reducing the formation of polygons inside the tube - Google Patents
Roll calibration of a tube reducing mill aimed at reducing the formation of polygons inside the tubeInfo
- Publication number
- DE2448158C3 DE2448158C3 DE19742448158 DE2448158A DE2448158C3 DE 2448158 C3 DE2448158 C3 DE 2448158C3 DE 19742448158 DE19742448158 DE 19742448158 DE 2448158 A DE2448158 A DE 2448158A DE 2448158 C3 DE2448158 C3 DE 2448158C3
- Authority
- DE
- Germany
- Prior art keywords
- tube
- reducing
- formation
- aimed
- rollers
- 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
Links
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Description
Die Erfindung betrifft eine auf die Verringerung der Polygonbildung im Rohrinneren ausgerichtete Walzenkalibrierung bei Walzensätzen mit jeweils drei Walzen eines mehrgerüstigen Rohrreduzierwalzwerkes zum Reduzieren von Rohren ohne innere Abstützung. Die Erfindung geht damit von einem Stand der Technik aus wie er durch die DE-PS 9 40 524 bzw. DE-AS 10 59 865 gegeben ist.The invention relates to a roller calibration aimed at reducing the formation of polygons inside the pipe for sets of rolls with three rolls each of a multi-stand tube reducing mill for Reduction of pipes without internal support. The invention is thus based on the prior art as given by DE-PS 9 40 524 and DE-AS 10 59 865.
Bei Rohrreduzierwalzwerken, die ohne Dorn arbeiten, tritt die Erscheinung der Ecken- oder Polygonbildung im Inneren der Rohre auf. Bei Verwendung eines Zweiwalzenkalibers ist das Polygon ein Viereck, bei Verwendung eines Dreiwalzenkalibers ist das Polygon ein Sechseck, vgl. hierzu DE-Patentanmeldung S 25 445 I b/7 A, ausgelegt am 15. April 1954.In tube reducing mills that work without a mandrel, the appearance of corner or polygon formation occurs inside the tubes. When using a two-roller caliber, the polygon is a square, at Using a three-roll caliber, the polygon is a hexagon, cf. DE patent application S 25 445 I b / 7 A, laid out April 15, 1954.
Es wurden viele Vorschläge gemacht, die Polygonbildung im Rohrinneren zu beseitigen oder wenigstens zu verringern. Die DE-PS 6 75 180 schlägt hierzu vor, die aufeinanderfolgenden Walzcnsätze so zu versetzen, daß die Kalibersprünge in bezug auf den Rohrumfang fortlaufend in verschiedenen Ebenen liegen. Sie schlägt weiter vor, anstelle der Versetzung der Walzensätzc eine Einrichtung zum Drehen des Rohres während seines Durchlaufes vorzusehen. Diese Vorschläge konnten nicht voll befriedigen, da im ersten Fall beim Antrieb der Walzensätze ein großer Aufwand zu treiben und im zweiten Fall eine zusätzliche Rohrdreheinrichtung vorzusehen war.Many proposals have been made to eliminate or at least to eliminate the formation of polygons inside the pipe to decrease. The DE-PS 6 75 180 proposes this to move the successive Walzcnätze so that the caliber jumps in relation to the pipe circumference are continuously in different planes. she beats further before, instead of offsetting the roller sets, means for rotating the tube during to provide for its passage. These proposals could not fully satisfy, since in the first case the To drive the roller sets a lot of effort and, in the second case, an additional tube rotating device was to be provided.
In ähnlicher Richtung gehen die Vorschläge, die aus 5uer DE-PS 940524 und der DE-AS 1059 865 bekannt sind.The proposals that are known from DE-PS 940524 and DE-AS 1059 865 go in a similar direction are.
Diesen Weg will die Erfindung verlassen, da es nachteilig ist in das auszuwalzende Rohr Torsionsbeanspruchungen bei dessen Drehung um die Längsachse ίο einzubringen.The invention intends to leave this path, since it is disadvantageous that the pipe to be rolled is subject to torsional stresses to be introduced when rotating around the longitudinal axis ίο.
Der Erfindung liegt deshalb die Aufgabe zugrunde, die Polygonbildung im Inneren der ohne innere Abstützung gewalzten Rohre durch eine spezielle Kalibrierung zu verringern, ohne daß die Walzen versetzt angeordnet sind oder ein Drehen der Rohre um deren Längsachse erfolgt.The invention is therefore based on the object of the polygon formation inside the without inner Support rolled tubes through a special calibration to reduce without the rollers are arranged offset or the tubes are rotated about their longitudinal axis.
Gelöst wird diese Aufgabe erfindungsgemäß dadurch, daß zur Annäherung der Verformungsverhältnisse des aus drei Walzen gebildeten Walzensatzes an die Verformungsverhältnisse eines aus sechs Walzen gebildeten Walzensatzes die Kaliberkonturen der Walzen an den Flanken vorgewölbt sind.This object is achieved according to the invention in that to approximate the deformation ratios of the Set of rollers formed from three rollers to the deformation ratios of one of six rollers formed roller set the caliber contours of the rollers are bulging on the flanks.
Zwai· sind aus der AT-PS 1 96 333, insbesondere F i £■ 8 bis 13 und Seite 2, Zeilen 37 und 38, schon Walzen von Rohrreduzierwalzwerken bekannt, die an den Flanken vorgewölbt sind, aber dieser Druckschrift ist die anmeldungsgemäße Aufgabe und deren dahinterstehender Problemkreis nirgendwo entnehmbar.AT-PS 1 96 333, in particular Fig. 8 to 13 and page 2, lines 37 and 38, already contain rollers known from Rohrreduzierwälzwerke, which are bulging on the flanks, but this document is the task according to the application and its underlying problems cannot be found anywhere.
In »Archiv für das Eisenhüttenwesen« (Heft 11, Nov.In "Archives for the iron and steel industry" (issue 11, Nov.
1970, Seiten 1047-1053) wird es zur Vermeidung der Polygonbildung als günstig geschildert, wenn die Kalibrierung bei einer Dreiwalzenanordnung eine »rechteckig gedrückte Fläche« erzeugen könnte.1970, pages 1047-1053) it is used to avoid the Polygon formation described as favorable when the calibration in a three-roller arrangement a "Rectangular pressed area" could generate.
Bei der erfindungsgemäßen Kalibrierung wird die gedrückte Fläche des Dreiwalzenkalibers der gedrückten Fläche eines Sechswalzenkalibers angenähert, d. h. durch diese Kaliberausbildung wird die gedrückte Fläche und somit der Anteil der Formänderung unter kreissymmetrischen Spannungszustand derart günstig beeinflußt, daß die Polygonbildung vermieden wird.In the calibration according to the invention, the pressed surface of the three-roller caliber becomes the pressed surface Surface of a six-roll caliber approximated, d. H. through this caliber training the pressed Area and thus the proportion of the change in shape under a circularly symmetrical stress state so favorable influences that the polygon formation is avoided.
In der Zeichnung ist eine mögliche Ausführungsform einer erfindungsgemäßen Kaliberkontur schematisch dargestellt. Wie aus der Zeichnung erkennbar, ist die Walze 1 an den Flanken bei 2 vorgewölbt.One possible embodiment of a caliber contour according to the invention is shown schematically in the drawing shown. As can be seen from the drawing, the roller 1 is bulged at the flanks at 2.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742448158 DE2448158C3 (en) | 1974-10-07 | 1974-10-07 | Roll calibration of a tube reducing mill aimed at reducing the formation of polygons inside the tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742448158 DE2448158C3 (en) | 1974-10-07 | 1974-10-07 | Roll calibration of a tube reducing mill aimed at reducing the formation of polygons inside the tube |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2448158A1 DE2448158A1 (en) | 1976-04-08 |
| DE2448158B2 DE2448158B2 (en) | 1976-09-16 |
| DE2448158C3 true DE2448158C3 (en) | 1980-09-04 |
Family
ID=5927917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19742448158 Expired DE2448158C3 (en) | 1974-10-07 | 1974-10-07 | Roll calibration of a tube reducing mill aimed at reducing the formation of polygons inside the tube |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2448158C3 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3924261A1 (en) * | 1989-07-20 | 1991-01-31 | Mannesmann Ag | Groove contour on three roller reducing mill for e.g. pipe - is shaped to prevent unwanted deformation on inside contour of pipe |
| WO1996025249A1 (en) * | 1995-02-14 | 1996-08-22 | Mannesmann Ag | Roll pass design system for a pipe-reducing rolling mill |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2844042A1 (en) * | 1978-10-09 | 1980-04-24 | Kocks Gmbh Friedrich | ROLLER ROLLER |
| DE19539408C2 (en) * | 1995-10-11 | 2003-03-20 | Sms Demag Ag | Caliber contour of the roll of a tube rolling mill |
| DE19722980C1 (en) * | 1997-06-02 | 1998-06-04 | Aluhett Aluminium Halbzeugwerk | Roll sets for production of round wire |
| RU2530591C2 (en) * | 2013-01-16 | 2014-10-10 | Открытое акционерное общество "Российский научно-исследовательский институт трубной промышленности" (ОАО "РосНИТИ") | Pipe mill pass |
| CN105363782A (en) * | 2015-11-30 | 2016-03-02 | 太原科技大学 | Stretch-reducing mill working set roll pass |
-
1974
- 1974-10-07 DE DE19742448158 patent/DE2448158C3/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3924261A1 (en) * | 1989-07-20 | 1991-01-31 | Mannesmann Ag | Groove contour on three roller reducing mill for e.g. pipe - is shaped to prevent unwanted deformation on inside contour of pipe |
| WO1996025249A1 (en) * | 1995-02-14 | 1996-08-22 | Mannesmann Ag | Roll pass design system for a pipe-reducing rolling mill |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2448158B2 (en) | 1976-09-16 |
| DE2448158A1 (en) | 1976-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2448158C3 (en) | Roll calibration of a tube reducing mill aimed at reducing the formation of polygons inside the tube | |
| DE1752713A1 (en) | Process for the rolling of tubes in a stretch-reducing mill | |
| DE2437545C3 (en) | Process for rolling metal rods | |
| DE2347891C2 (en) | Rolling mill for reducing the stretching of tubes | |
| DE19516595C2 (en) | Hole rolling process and hole rolling device for seamless steel pipes | |
| DE2902827C2 (en) | Cross-roll straightening machine for pipes | |
| EP2358485B1 (en) | Method for producing seamless tubes by means of a three-roll bar rolling mill | |
| DE1016675B (en) | Device for rounding sheet metal strips for the production of welded pipes with longitudinal seams, especially those of larger diameter | |
| DE366710C (en) | Process for rolling down pipes | |
| DE680743C (en) | Tube reducing and sizing mill | |
| DE2403686C2 (en) | Process for the production of metal pipes from easily deformable materials, in particular from non-ferrous metals, by means of cold pilgrimages | |
| DE2131713A1 (en) | Tube rolling mill | |
| DE4242423C1 (en) | Pre-reduction device | |
| DE743742C (en) | Process for producing tubes on a continuous reducing mill | |
| EP0445899B1 (en) | Method for manufacture of medium- and thinwalled seamless pipes and rolling device therefor | |
| DE608095C (en) | Rolling mill for simultaneous stretching as well as smoothing and rounding of tubes in successive sets of rolls | |
| DE2715847C2 (en) | Calibration for a piercing mill | |
| DE1267647B (en) | Device for the continuous deformation of round tubes into tubes with an angular cross-section | |
| DE636741C (en) | Device for the production of seamless tubes | |
| DE2109826A1 (en) | Method and device for the production of cold drawn tubes with a straight bore | |
| DE3143244A1 (en) | Rolling stand for rolling bars or wire | |
| DE102005038574A1 (en) | Roll stand has three or more rollers in form of pulleys whose inner edges form caliber, each roller having peripheral groove with flat central section and outer edges at angle to it | |
| AT147745B (en) | Device for the production of seamless tubes. | |
| DE540684C (en) | Roll calibration for pilgrim step mills | |
| DE2528883C2 (en) | Calibration of a three-roll stretch-reducing mill to avoid the formation of polygons inside the pipe during stretch-reducing rolling of pipes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C3 | Grant after two publication steps (3rd publication) | ||
| 8339 | Ceased/non-payment of the annual fee |