Pipe forming line and pipe forming method

B - Operations – Transporting – 21 – B

Patent

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Details

B21B 17/00 (2006.01) B21B 13/00 (2006.01) B21C 37/08 (2006.01) B21C 37/083 (2006.01)

Patent

CA 2276771

A pipe forming line that has breakdown and cluster forming sections and have rolls having flexible forming capability and compatibility with steel pipes of various sizes and is capable of conducting forming by continuous roll forming is provided together with a pipe production method. A pipe forming line comprising breakdown stands, cluster stands or cage roll stands, and fin-pass stands and a pipe forming method, the pipe forming line being characterized in that, in order to bend-form to a substantially semicircular shape or a substantially final product shape by upper and lower rolls of at least multiple stages of the break down stands, it uses as the roll caliber a curve whose curvature varies continuously or stepwise, and is directly installed with a fin-pass mill without installation of cage rolls.

Une structure de moulage et un procédé de fabrication de tuyaux qui sont capables d'exécuter un processus de moulage par une opération de moulage en continu par des rouleaux utilisant des rouleaux bi-fonction convenablement utilisés pour des tuyaux d'acier d'une pluralité de tailles. Une structure de moulage et un procédé de fabrication de tuyaux dans lesquels la structure de moulage de tuyaux comprend un poste de défonçage, un poste de regroupement ou un poste de rouleau-cage et un poste de galets de guidage, caractérisés en ce qu'une courbe dont l'incurvation varie en continu ou au pas à pas est utilisée en tant que calibre à galets pour mouler en courbe les tuyaux en une forme sensiblement semi-circulaire ou sensiblement en une forme de produits finis par une pluralité d'étages de galets supérieurs et inférieurs du poste de défonçage avec un laminoir à galets de guidage sans fournir de rouleau-cage.

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