DE872484C - Extrusion of pipes - Google Patents

Extrusion of pipes

Info

Publication number
DE872484C
DE872484C DEM3925D DEM0003925D DE872484C DE 872484 C DE872484 C DE 872484C DE M3925 D DEM3925 D DE M3925D DE M0003925 D DEM0003925 D DE M0003925D DE 872484 C DE872484 C DE 872484C
Authority
DE
Germany
Prior art keywords
extrusion
pipes
pressing
pipe
punch
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
DEM3925D
Other languages
German (de)
Inventor
Wilhelm Wellmann
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.)
Vodafone GmbH
Original Assignee
Mannesmannroehren Werke 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 Mannesmannroehren Werke AG filed Critical Mannesmannroehren Werke AG
Priority to DEM3925D priority Critical patent/DE872484C/en
Application granted granted Critical
Publication of DE872484C publication Critical patent/DE872484C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00Profiling tools for metal extruding
    • B21C25/04Mandrels

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Forging (AREA)
  • Punching Or Piercing (AREA)

Description

Beim. Pressen von Strahlrohren auf Rohrstrangpressen mit ' kegelförmig ausgebildetem Stempelkopf hat es sich häufig gezeigt, daß,das zuerst raustretende Rohrstück, -das sogenannte Anpreßende, nicht die ,gleich günstigen technologischen Eigenschaften aufweist wie die übrigen Rohrteile und das zuletzt 'austretende Rohrstück. Insbesondere die sogenannte Ringiaufweiteprobe fällt nicht immer b:efriedügend aus, so daß ein Teil des Anpreßendos sehr oft abgetrennt werden muß.At the. Pressing of jet pipes on pipe extrusion with 'conical trained punch head, it has often been shown that the first step out Pipe section, the so-called pressing, not the equally cheap technological one Has properties like the other pipe parts and the last 'exiting pipe section. In particular, the so-called ring expansion test is not always satisfactory, so that a part of the pressure endos has to be separated very often.

Erfindungsgemäß wird dieser Nachteil durch Verwendung eines Stempelkopfes vermieden, dessien kegelförmige Preßfläche :eine konzentrisch zur Stempelachse liegende mittlere Vertiefung` aufweist. Ähnlich ,ausgebildete PreßstempelkÖpfe sind für das Straugpressen voller Werkstücke bereits biekannt, sie bezwecken dort das Vermeiden eines Hohlraumes rain hinteren Strangende. Es war nicht vorauszusehen, daß siolche Stempelköpfe, wenn sie mit einer Bohrung zur Aufnahme des, Lo,chdozries versehen sind und beim Strangpressen von Rohren Verwendung finden, eine Verbesseig der vorderen. Rohrstücke zurr Folge haben.According to the invention, this disadvantage is eliminated by using a stamp head avoided, whose conical pressing surface: a concentric to the punch axis middle indentation. Similarly, trained die heads are for that Extruding presses full of workpieces are already bent, they aim to avoid them there a cavity rain rear end of the strand. It was not foreseeable that they would Stamp heads, if they are provided with a hole for receiving the, Lo, chdozries and are used in the extrusion of pipes, an improvement in the front. Result in pieces of pipe.

Die Zeichnung zeigt seinerseits. in den Abb. i bis 3 den. Stand der Technik, anderseits in :den Abb. 4 und 5 den Gegenstand er Erfindung.The drawing shows his part. in Figs. i to 3 den. State of Technology, on the other hand in: Figs. 4 and 5 the subject of the invention.

In Abb. r veranschaulichen a den Block, b Aden Blockaufnehmer, c die Matrize, kl den Lochdorn:, e den Stempelschaft, f Iden Preßstempielkopf,dessen P.reßB.äche kegelfönng ,ausgebildet ist. Bei der,dargestell.ten Stellung der Werkzeuge ist der Lochvorgang soeben beendet, so daß das eigentliche Auspressen sogleich. beginnen kann. Beim Auspressen druckt die dem Lochdorn am nächsten liegende Ringfläche g des Stempelkopfes zuerst auf den Preßblo:ck; so da,ß die bei k liegenden Blockteile als erste in den freien Ringraum zwischen Matrizenwandeng lind Lochdorn eintreten und so das Anpreßende des Rohres bilden. Offenbar sind die Blackteilelx durch den Lochvorgang mit Steigerungsstellen, angereichert, wodurch die Qualitätsverschlechterung des Anpreßendes erklärt werden kann: ``Abt. z zeigt die Stellung der Werkzeuge beim Beginn des Anpressens.In Fig. R, a illustrate the block, b A the block pick-up, c the Die, kl the piercer :, e the punch shaft, f I the press die head, whose press surface kegelfönng, is trained. In the illustrated position of the tools is the The punching process has just ended, so that the actual pressing out takes place immediately. kick off can. During the pressing out, the ring surface g closest to the piercer prints of the punch head first on the press block; so there, ß the block parts lying at k Be the first to enter the free annular space between the die walls and the piercer and so form the pressing end of the pipe. Apparently the Blackteilelx are through the Punching process with increase points, enriched, thereby reducing the quality of the pressing end can be explained: `` Dept. z shows the position of the tools at Start of pressing.

Abb.3 zeigt die bisher verwendete Stempelkopf-form im vergrößerten Maßstab.Fig. 3 shows the die head shape used up to now on an enlarged scale.

In Abb.4 ist eine Stempelform dargestellt, Klie mit ein=er konzentrisch zur Stempelachse liegenden mittleren Vertiefung versehen ist, wie sie erfindungsgemäß zum Strangpressen @ von Rohren Verwendung finden soll.In Fig.4 a stamp shape is shown, pin with a = er concentric is provided lying to the stamp axis central recess, as it is according to the invention to be used for the extrusion @ of pipes.

Abb.5 zeigt den Einbaueines, Stempelkopfes gemäß Abb.4. Die Wirkung dieses Stempelkopfes ist,derart, :daß nun nicht mehr die dem Dorn zunächst liegenden Blockteile h das Anpreßende bilden.Fig.5 shows the installation of a punch head according to Fig.4. The effect this punch head is so: that now no longer those lying next to the mandrel Block parts h form the pressing end.

Claims (1)

PATENTANSPRUCH: Die Verwendung eines: Preßstempels mit kegelförmiger Preß$äche und einer zur Stempelachse konzentrisch angeordneten mittleren Vertiefung zurr Strängpressen von Rohren.PATENT CLAIM: The use of a: press ram with a conical Press surface and a central recess arranged concentrically to the punch axis for extrusion of pipes.
DEM3925D 1942-01-31 1942-01-31 Extrusion of pipes Expired DE872484C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM3925D DE872484C (en) 1942-01-31 1942-01-31 Extrusion of pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM3925D DE872484C (en) 1942-01-31 1942-01-31 Extrusion of pipes

Publications (1)

Publication Number Publication Date
DE872484C true DE872484C (en) 1953-04-02

Family

ID=7292427

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM3925D Expired DE872484C (en) 1942-01-31 1942-01-31 Extrusion of pipes

Country Status (1)

Country Link
DE (1) DE872484C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3201966A (en) * 1961-05-23 1965-08-24 Benteler Werke Ag Apparatus for the extrusion pressing of tubes, especially steel tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3201966A (en) * 1961-05-23 1965-08-24 Benteler Werke Ag Apparatus for the extrusion pressing of tubes, especially steel tubes

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