Long deformed extruded metallic shape and method of...

B - Operations – Transporting – 21 – C

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B21C 23/14 (2006.01) B21C 25/08 (2006.01)

Patent

CA 2090432

In producing a long extruded metal article of miscellaneous shapes, no post-working such as cutting is applied to the shaped long metal billet but extrusion of the metal billet and formation of miscellaneous shapes of the extruded article are effected both at a time for efficient production of the article. Since the metal flow of the extruded article is not cut, the extruded article has improved mechanical strength, especially fatigue-resistant strength. In extruding a long metal billet with an extruder, a die equipped with at least one hole section-varying device capable of acting due to a cylinder device or the like is employed with suitably varying the hole section profile of the die during extrusion so that a long extruded metal article of miscellaneous shapes where the section profile of at least the lengthwise direction of it varies is obtained.

Dans la production d'un long article de métal saillant de formes diverses, aucun travail ultérieur, tel que la coupe, n'est appliqué à la longue billette de métal mais le filage de la billette en question et la formation des diverses formes de l'article filé sont exécutés simultanément de façon à permettre une production efficace de l'article. Puisque le fluage du métal de l'article filé n'est pas coupé, l'article possède une force mécanique améliorée, surtout en ce qui a trait à la résistance à la fatigue. Dans le filage d'une longue billette de métal à l'aide d'une presse à filer, une filière équipée d'au moins un dispositif de variation de section à un trou, pouvant agir grâce à un dispositif cylindrique ou autre dispositif semblable, est utilisée en variant le profil du trou de la filière pendant le filage de façon à obtenir un long article en métal filé de formes diverses où le profilé d'au moins sa direction dans le sens de la longueur varie.

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