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.)
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Vodafone GmbH
Original Assignee
Mannesmannroehren Werke AG
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Filing date
Publication date
Application filed by Mannesmannroehren Werke AGfiledCriticalMannesmannroehren Werke AG
Application grantedgrantedCritical
Publication of FR688338ApublicationCriticalpatent/FR688338A/fr
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
B21B19/08—Enlarging tube diameter
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Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
Reduction Rolling/Reduction Stand/Operation Of Reduction Machine
(AREA)
FR688338D1929-01-181930-01-16Procédé et appareil pour la dilatation des tubes métalliques
ExpiredFR688338A
(fr)