DE1602321C3 - Process for the production of the starting pipes in the course of the production of longitudinally welded steel pipes - Google Patents
Process for the production of the starting pipes in the course of the production of longitudinally welded steel pipesInfo
- Publication number
- DE1602321C3 DE1602321C3 DE19671602321 DE1602321A DE1602321C3 DE 1602321 C3 DE1602321 C3 DE 1602321C3 DE 19671602321 DE19671602321 DE 19671602321 DE 1602321 A DE1602321 A DE 1602321A DE 1602321 C3 DE1602321 C3 DE 1602321C3
- Authority
- DE
- Germany
- Prior art keywords
- production
- pipes
- starting
- course
- wall thickness
- 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
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
Description
Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Patentanspruches.The invention relates to a method according to the preamble of the patent claim.
Aus der belgischen Patentschrift 677 212 ist ein Verfahren bekannt, bei dem ein geschweißtes Rohr in der Wanddicke kalt um 50 bis 65% heruntergewalzt und durch eine Wärmebehandlung gefügemäßig homogenisiert wird. Daneben ist durch die österreichische Patentschrift 134 955 bekannt, daß durch Walzen eines geschweißten Rohres über Stopfen oder Stange Ungenauigkeiten oder Fehler der Schweißnaht ausgeglichen werden können.From the Belgian patent specification 677 212 a method is known in which a welded pipe in the Wall thickness rolled down by 50 to 65% cold and homogenized according to structure by a heat treatment will. In addition, it is known from Austrian patent specification 134 955 that by rolling one welded tube compensated for inaccuracies or errors in the weld seam via plug or rod can be.
Unabhängig davon ist es bekannt, daß durch Streckreduzieren neben der Durchmesserreduzierung des Rohres die Wanddicke erhöht, vermindert oder gleich gehalten werden kann. Von der letzten Möglichkeit macht die deutsche Auslegeschrift 1 017 122 bei der Herstellung dünnwandiger Längsnahtrohre Gebrauch, da eine Verminderung der Wanddicke bei diesen dünnwandigen Rohren zu einem Zusammenfallen oder Rei-Ben des Rohres führen würde. Daher wird dabei die Wandstärke des Fertigrohres durch den Einsatz entsprechend dicker Ausgangsbänder festgelegt.Independently of this, it is known that by reducing the stretch in addition to reducing the diameter of the pipe, the wall thickness is increased, decreased or equal can be held. The German Auslegeschrift 1 017 122 makes reference to the last possibility in the Manufacture of thin-walled longitudinal sewing pipes, because a reduction in the wall thickness of these thin-walled pipes is used Pipes would cause the pipe to collapse or rub. Therefore, the Wall thickness of the finished pipe determined by the use of correspondingly thick starting strips.
Dies würde aber bedeuten, daß bei einer Wanddikkenreduzierung um mindestens 50% zum Zwecke derBut this would mean that with a wall thickness reduction by at least 50% for the purpose of
ίο Homogenisierung der Schweißnaht von entsprechend dicken Ausgangsbändern auszugehen wäre. Bei der Herstellung geschweißter Rohre stößt man aber auf die Schwierigkeit, daß bei der Herstellung von Schlitzrohren auf Einrollwerkzeugen ein bestimmtes Verhältnis vom äußeren Durchmesser zur Wanddicke nicht unterschritten werden kann. Das Einrollen eines Schlitzrohres von z. B. 65 mm äußerem Durchmesser mit einer Wand von 8 mm ist schwierig, während ein Schlitzrohr von 160 mm äußerem Durchmesser mit 8 mm Wandίο homogenization of the weld seam from accordingly thick output ligaments would be assumed. But when manufacturing welded pipes you come across them Difficulty that in the production of slotted tubes on curling tools a certain ratio the outer diameter cannot fall below the wall thickness. Rolling up a slotted pipe from Z. B. 65 mm outer diameter with a wall of 8 mm is difficult, while a slotted tube of 160 mm outer diameter with 8 mm wall
ao noch einwandfrei zum Schlitzrohr geformt und anschließend verschweißt werden kann.ao still perfectly formed into a slotted tube and then can be welded.
Aufgabe der Erfindung ist es, unter Zugrundelegung des möglichen Verhältnisses von Wanddicke und Durchmesser bei der Herstellung der Ausgangsnahtrohre durch Einrollen und Schweißen noch ein Biegen des Ausgangsbandes zu ermöglichen.The object of the invention is, on the basis of the possible ratio of wall thickness and Diameter in the manufacture of the starting sutures by rolling and welding still a bending of the starting tape to allow.
Ferner soll das Angebot an Ausgangsrohren für das Stangen- bzw. Stopfenwalzwerk aus dieser Bindung gelöst werden.Furthermore, the range of output tubes for the rod and plug mill is to be released from this bond will.
Gelöst wird diese Aufgabe erfindungsgemäß durch die im Kennzeichen des Anspruches angegebenen Merkmale.According to the invention, this object is achieved by what is stated in the characterizing part of the claim Characteristics.
Hierdurch wird erreicht, daß die geschweißten, im Querschnitt homogenen Rohre hergestellt werden können, ohne Berücksichtigung der Abhängigkeit des Einrollvorganges von der Ausgangsbanddicke und dem Durchmesser der Ausgangsnahtrohre, so daß damit das Angebot an Ausgangsnahtrohren erweitert werden kann.This ensures that the welded pipes with a homogeneous cross-section can be produced, without taking into account the dependence of the rolling-in process on the initial strip thickness and the Diameter of the exit sutures, so that the range of exit sutures can be expanded can.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM0076468 | 1967-12-05 |
Publications (3)
Publication Number | Publication Date |
---|---|
DE1602321A1 DE1602321A1 (en) | 1970-05-06 |
DE1602321B2 DE1602321B2 (en) | 1974-06-27 |
DE1602321C3 true DE1602321C3 (en) | 1975-02-20 |
Family
ID=7317039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19671602321 Expired DE1602321C3 (en) | 1967-12-05 | 1967-12-05 | Process for the production of the starting pipes in the course of the production of longitudinally welded steel pipes |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1602321C3 (en) |
FR (1) | FR1571690A (en) |
GB (1) | GB1205853A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2605486C2 (en) * | 1976-02-12 | 1982-11-11 | Kocks Technik Gmbh & Co, 4010 Hilden | Process for the production of longitudinally welded pipes |
-
1967
- 1967-12-05 DE DE19671602321 patent/DE1602321C3/en not_active Expired
-
1968
- 1968-06-20 FR FR1571690D patent/FR1571690A/fr not_active Expired
- 1968-06-28 GB GB3109968A patent/GB1205853A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1205853A (en) | 1970-09-23 |
DE1602321B2 (en) | 1974-06-27 |
FR1571690A (en) | 1969-06-20 |
DE1602321A1 (en) | 1970-05-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
SH | Request for examination between 03.10.1968 and 22.04.1971 | ||
C3 | Grant after two publication steps (3rd publication) |