DE964945C - Process for preparing pipes made of alloyed, preferably high-alloy, e.g. austenitic steel for the drawing process - Google Patents

Process for preparing pipes made of alloyed, preferably high-alloy, e.g. austenitic steel for the drawing process

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Publication number
DE964945C
DE964945C DER7615A DER0007615A DE964945C DE 964945 C DE964945 C DE 964945C DE R7615 A DER7615 A DE R7615A DE R0007615 A DER0007615 A DE R0007615A DE 964945 C DE964945 C DE 964945C
Authority
DE
Germany
Prior art keywords
alloyed
pipe
drawing process
alloy
preferably high
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
Application number
DER7615A
Other languages
German (de)
Inventor
Andreas Nattermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Phoenix Rheinrohr AG
Original Assignee
Phoenix Rheinrohr AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Phoenix Rheinrohr AG filed Critical Phoenix Rheinrohr AG
Priority to DER7615A priority Critical patent/DE964945C/en
Application granted granted Critical
Publication of DE964945C publication Critical patent/DE964945C/en
Expired legal-status Critical Current

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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
    • B21C5/00—Pointing; Push-pointing
    • 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
    • B21C5/00—Pointing; Push-pointing
    • B21C5/003—Pointing; Push-pointing of hollow material, e.g. tube

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)

Description

(WiGBl. S. 175)(WiGBl. P. 175)

AUSGEGEBEN AM 29. MAI 1957ISSUED MAY 29, 1957

für den Ziehvorgangfor the drawing process

Beim Herstellen von Rohren kommt dem Ziehen der Rohre im warmen und kalten Zustand eine erhebliche Bedeutung zu. Vor dem Ziehen wird ein Ende des gewalzten Rohres durch Einschnüren, Falten u. dgl. so verjüngt, daß es durch den Ziehring hindurchgeht und auf der anderen Ziehringseite vom Ziehwagen bzw. der Ziehzange erfaßt werden kann.When producing pipes, the drawing of the pipes in the warm and cold state has a significant impact Importance to. Before drawing, one end of the rolled tube is tightened by constriction, Folds and the like are tapered so that it passes through the drawing ring and on the other side of the drawing ring can be grasped by the pulling carriage or the pulling pliers.

Es ist bereits bekannt, beim Vorbereiten von Rohren für den Ziehvorgang ein Rohrende durch Anschweißen einer fertigen Ziehangel vorzuschuhen. Es war bisher in der Ziehtechnik üblich, für die Angeln den Werkstoff der zu ziehenden Werkstücke zu verwenden. Nach dem Ziehen wird die Angel von dem gezogenen Rohr abgeschnitten und wandert entweder üblicherweise in den Schrott oder kann zwecks Einsparung von Werkstoff und Kosten gemäß einer Schrifttumsangabe an dem Ende, welches dem Rohr zugewendet war, wieder aufgeweitet und erneut an ein anderes, zu ziehendes Rohr angeschweißt werden.It is already known to pull a pipe end through when preparing pipes for the drawing process Welding a finished Ziehangel to show. Up until now it was common in drawing technology to use the material of the workpieces to be drawn for the hinges. After pulling it will the tang is cut off from the drawn pipe and either usually goes into the scrap or can, for the purpose of saving material and costs, according to an indication of the literature on the End that was facing the pipe, widened again and again to another to be pulled Pipe to be welded.

Auch das Anschweißen je einer Ziehangel an beiden Rohrenden ist bekannt, um nach einmaligem Ziehen in umgekehrter Richtung weiterziehen zu können.It is also known to weld a pulling lever to both pipe ends in order to Pulling in the opposite direction to be able to continue pulling.

Es ist ferner in der Walztechnik üblich, Teile aus schwer verformbarem Stahl, z. B. Knüppel, mit vorzuschweißenden Stücken aus leichter verformbarem Stahl zu versehen, um das Einbringen in das Walzkaliber, d.h. die Einleitung des Fließ Vorgangs, zu erleichtern.It is also common in rolling technology to produce parts made of steel that is difficult to deform, e.g. B. Stick, with to be pre-welded pieces made of more easily deformable steel in order to facilitate the introduction into the Rolling pass, i.e. the initiation of the flow process, to facilitate.

Mit Hilfe der Erfindung, die sich auf die Vorbereitung von Rohren aus legiertem, insbesondere hochlegiertem Werkstoff für den Ziehvorgang be-With the help of the invention, focusing on the preparation of pipes from alloy, in particular high-alloy material for the drawing process

709 525/392709 525/392

zieht, sollen gleichfalls Werkstoff und Kosten eingespart werden.pulls, material and costs should also be saved.

Im vorliegenden Fall kann diese Einsparung aber nicht, wie im bekannten EaM, dadurch erfolgen, daß die zum Ziehen benutzte Angel für das Ziehen weiterer Rohre weiterverwendet wird, da sie wegen der geringen Wandstärke der hier interessierenden gezogenen, hochwertigen Rohre im Querschnitt so geschwächt ist, daß sie die Beanspruchungen einer erneuten. Verwendung nicht aushalten würde. Es hat sich deshalb als notwendig erwiesen, im vorliegenden Fall nach einem anderen Weg zur Einsparung von Werkstoff und Kosten zu suchen.In the present case, however, this saving cannot be made, as in the known EaM, by that the fishing rod used for pulling will continue to be used for pulling further pipes, since they because of the low wall thickness of the drawn, high-quality pipes in the Cross-section is so weakened that it can withstand the stresses of renewed. Cannot endure use would. It has therefore proven necessary, in the present case after another To find a way to save material and costs.

Zur Lösung dieser Aufgabe wird erfindungsgemäß mindestens ein Ende des zu ziehenden, aus legiertem, insbesondere hochlegiertem Werkstoff bestehenden Rohres durch Verschweißen mit einem zur Bildung einer Ziehangel ausreichenden Rohrstück aus minderwertigem, also nicht oder weniger hodhfegieirtem Werkstoff vorgescihuht und dann die Ziehangel gebildet.To solve this problem, according to the invention, at least one end of the to be pulled out alloyed, in particular high-alloy material existing pipe by welding with a for the formation of a pull rod sufficient pipe section from inferior quality, i.e. not at all or less hodhfegieirtem material and then the Ziehangel formed.

Die erfindungsgemäße Maßnahme hat den Vorteil, daß das Angelende, welches im vorliegenden Fall nach dem Ziehvorgang in den Schrott wandert, aus einem wesentlich billigeren Werkstoff besteht. Ein bis zu 15% betragender Verlust an legiertem Werkstoff, wie er beim Vorschuhen eines Rohrstücks bzw. einer fertigen Ziehangel aus demselben Werkstoff wie das zu ziehende Rohr eintreten würde, wird durch die Erfindung fast ganz vermieden. Auch ist die Angelbildung bei weichem, z. B. unlegiertem Stahl leichter zu bewerkstelligen.The measure according to the invention has the advantage that the fishing end, which in the present case migrates into the scrap after the pulling process, from a much cheaper material. A loss of alloyed material amounting to up to 15%, as it does when a piece of pipe or a finished drawbar made of the same material is preloaded how the pipe to be drawn would occur is almost entirely avoided by the invention. The tangling is also possible with soft, e.g. B. mild steel easier to accomplish.

Die Anwendung des erfindungsgemäßen Verfahrens erstreckt sich auch auf in anderer Weise, z. B. aus Bandstahl hergestellte, geschweißte bzw. gefalzte Rohre aus hochwertigem Werkstoff.The application of the method according to the invention also extends in other ways, e.g. B. Welded or folded tubes made of high-quality material made from strip steel.

Claims (1)

PATENTANSPRUCH:PATENT CLAIM: Verfahren zum Vorbereiten von Rohren aus legiertem, vorzugsweise hochlegiertem, z. B. austenitischem Stahl für den Ziehvorgang, bei dem zur Vermeidung von Verlusten an Rohrwerkstoff mindestens auf einer Seite des Rohres ein von der Ziehzange zu ergreifendes Stück durch Schweißen vorgeschuht wird, dessen Abtrennung im Anschluß an den Ziehvorgang wieder erfolgt, dadurch gekennzeichnet, daß an dem oder den Enden des Rohres ein zur Bildung einer Ziehangel ausreichendes Rohrstück aus minderwertigem, d. h. unlegiertem oder schwachlegiertem Werkstoff vorgeschuht und dann die Ziehangel gebildet wird.Method for preparing pipes made of alloyed, preferably high-alloyed, e.g. B. Austenitic steel for the drawing process, in which to avoid losses of pipe material a piece to be gripped by the drawing pliers on at least one side of the pipe is pre-shoed by welding, the separation of which again after the drawing process takes place, characterized in that at the one or the ends of the tube for formation A piece of pipe made of inferior quality, d. H. unalloyed or weakly alloyed material and then the Ziehangel is formed. In Betracht gezogene Druckschriften:
Deutsche Patentschriften Nr. 429854, 653425; österreichische Patentschrift Nr. 137 995.Considered publications:
German Patent Nos. 429854, 653425; Austrian patent specification No. 137 995. © 709 525/392 5.57© 709 525/392 5.57
DER7615A 1951-11-14 1951-11-14 Process for preparing pipes made of alloyed, preferably high-alloy, e.g. austenitic steel for the drawing process Expired DE964945C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER7615A DE964945C (en) 1951-11-14 1951-11-14 Process for preparing pipes made of alloyed, preferably high-alloy, e.g. austenitic steel for the drawing process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER7615A DE964945C (en) 1951-11-14 1951-11-14 Process for preparing pipes made of alloyed, preferably high-alloy, e.g. austenitic steel for the drawing process

Publications (1)

Publication Number Publication Date
DE964945C true DE964945C (en) 1957-05-29

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ID=7397643

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Application Number Title Priority Date Filing Date
DER7615A Expired DE964945C (en) 1951-11-14 1951-11-14 Process for preparing pipes made of alloyed, preferably high-alloy, e.g. austenitic steel for the drawing process

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE429854C (en) * 1924-12-07 1926-06-04 Theodor Wulf Dipl Ing Process for drawing pipes and the like like. without thorn
AT137995B (en) * 1932-11-24 1934-06-11 Witkowitzer Bergb Gewerkschaft Method for preparing workpieces, in particular pipes, rods and the like. like. for pulling.
DE653425C (en) * 1936-04-16 1937-11-23 Fried Krupp Akt Ges Process for rolling materials that are difficult to deform

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE429854C (en) * 1924-12-07 1926-06-04 Theodor Wulf Dipl Ing Process for drawing pipes and the like like. without thorn
AT137995B (en) * 1932-11-24 1934-06-11 Witkowitzer Bergb Gewerkschaft Method for preparing workpieces, in particular pipes, rods and the like. like. for pulling.
DE653425C (en) * 1936-04-16 1937-11-23 Fried Krupp Akt Ges Process for rolling materials that are difficult to deform

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