DE741279C - Process for inclined rolling of hollow blocks - Google Patents

Process for inclined rolling of hollow blocks

Info

Publication number
DE741279C
DE741279C DEM146472D DEM0146472D DE741279C DE 741279 C DE741279 C DE 741279C DE M146472 D DEM146472 D DE M146472D DE M0146472 D DEM0146472 D DE M0146472D DE 741279 C DE741279 C DE 741279C
Authority
DE
Germany
Prior art keywords
rolling
hollow blocks
hollow
inclined rolling
hollow block
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
DEM146472D
Other languages
German (de)
Inventor
Dipl-Ing Albert Calmes
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
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Priority to DEM146472D priority Critical patent/DE741279C/en
Application granted granted Critical
Publication of DE741279C publication Critical patent/DE741279C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • B21B19/06—Rolling hollow basic material, e.g. Assel mills

Description

Verfahren zum Schrägwalzen von Hohlblöcken Die Erfindung betrifft ein Verfahren zum Schrägwalzen von Hohlblöcken über einem in axialer Richtung feststehenden Lochdorn und besteht darin, daß zum einwandfreien Auswalzen auch des Hohlblockendes als Vorprodukt einseitig geschlossene Hohlblöcke verwendet werden, die mit dem offenen Ende zuerst in das Schrägwalzwerk eingeführt werden und deren Bodenteile im letzten Teil des Walzvorganges durchstoßen und ausgewalzt werden.A method of Sch rägwalze n hollow billets The invention relates to a method for cross rolling hollow billets to a fixed in the axial direction piercer and is that to the proper rolling also of the hollow block end can be used as precursor unilaterally closed hollow blocks with the open end first, into the Cross rolling mill are introduced and the bottom parts are pierced and rolled out in the last part of the rolling process.

Das Verfahren ist besonders dann mit gutem Erfolg anzuwenden, wenn im Schrägwalzwerk ein Hohlblock gestreckt werden soll, dessen Innendurchmesser erheblich größer ist als der Dorndurchmesser. In diesem Fall neigt erfahrungsgemäß das letzte Ende eines durchgelochten Hohlblockes zum Unrundlaufen und zur Schleifenbildung. Das Unrundlaufen und die Schleifenbildung können so stark werden, daß sich der Hohlblock zwischen den Walzen festsetzen und .zum Stillstand kommen kann. Dann entsteht neben einer Störung des Arbeitsverlaufs auch ein erheblicher Endenabfall am Hohlblock. Mit Verwendung von Hohlblöcken gemäß der Erfindung werden walztechnisch günstigere Bedingungen für das letzte Ende des Hohlblockes geschaffen, die die geschilderten Nachteile vermeiden.-The procedure can be used with good success especially if A hollow block is to be stretched in the piercing mill, the inner diameter of which is considerable is larger than the mandrel diameter. In this case, experience shows that the last one tends End of a perforated hollow block for running out of true and creating loops. The runout and the formation of loops can be so strong that the hollow block between the rollers and. can come to a standstill. Then comes next If the work process is disrupted, there is also a considerable drop in the ends of the hollow block. With the use of hollow blocks according to the invention, rolling technology is more favorable Conditions for the last end of the hollow block created the described Avoid disadvantages.

Claims (1)

PATENTANSPRUCH: , Verfahren zum Schrägwalzen von Hohlblöcken über einem in axialer Richtung feststehenden Lochdorn, dadurch gekennzeichnet, daß zum einwandfreien Auswalzen auch des Hohlblockendes als Vorprodukt einseitig geschlossene Hohlblöcke verwendet werden, die mit dem offenen Ende zuerst in das Schrägwalzwerk eingeführt werden und deren Bodenteile im letzten Teil des Walzvorganges durchstoßen und ausgewalzt werden. Zur Abgrenzung des Anmeldungsgegenstandes vom Stand der Technik sind im Erteilungsverfahren in Betracht gezogen worden: deutsche Patentschrift 1Tr. 45 892, 329 235, 639 146; amerikanische Patentschrift Nr. 1 957 915-PATENT CLAIM: A method for skew rolling hollow blocks over a piercing mandrel that is fixed in the axial direction, characterized in that hollow blocks closed on one side are also used as a preliminary product for perfect rolling out of the hollow block end, the open end of which is first introduced into the skew rolling mill and the bottom parts in the last Part of the rolling process to be pierced and rolled out. To distinguish the subject of the application from the state of the art, the following were considered in the granting procedure: German patent specification 1Tr. 45 892, 329 235, 639 146; American Patent No. 1 957 915-
DEM146472D 1939-11-16 1939-11-16 Process for inclined rolling of hollow blocks Expired DE741279C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM146472D DE741279C (en) 1939-11-16 1939-11-16 Process for inclined rolling of hollow blocks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM146472D DE741279C (en) 1939-11-16 1939-11-16 Process for inclined rolling of hollow blocks

Publications (1)

Publication Number Publication Date
DE741279C true DE741279C (en) 1943-11-08

Family

ID=7336038

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM146472D Expired DE741279C (en) 1939-11-16 1939-11-16 Process for inclined rolling of hollow blocks

Country Status (1)

Country Link
DE (1) DE741279C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE817582C (en) * 1949-05-01 1951-10-18 Meer A G Maschf Helical rolling mill

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE45892C (en) * Dr. F. KOEGEL in Remscheid - Bödinghausen Process for expanding tubes
DE329235C (en) * 1918-08-01 1920-11-20 Huettenbetr Abteilung Duesseld Process for the production of perforated metal pipe blocks for the production of seamless pipes
US1957915A (en) * 1932-07-27 1934-05-08 Ralph C Stiefel Production of seamless tubes
DE639146C (en) * 1933-05-06 1936-11-30 Fritz Kocks Dr Ing Angled rolling mill for the production of hollow bodies (tubes or the like) by longitudinal stretching

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE45892C (en) * Dr. F. KOEGEL in Remscheid - Bödinghausen Process for expanding tubes
DE329235C (en) * 1918-08-01 1920-11-20 Huettenbetr Abteilung Duesseld Process for the production of perforated metal pipe blocks for the production of seamless pipes
US1957915A (en) * 1932-07-27 1934-05-08 Ralph C Stiefel Production of seamless tubes
DE639146C (en) * 1933-05-06 1936-11-30 Fritz Kocks Dr Ing Angled rolling mill for the production of hollow bodies (tubes or the like) by longitudinal stretching

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE817582C (en) * 1949-05-01 1951-10-18 Meer A G Maschf Helical rolling mill

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