Lined pipe for forming spirals for spiralling machines and...

B - Operations – Transporting – 21 – D

Patent

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Details

B21D 11/14 (2006.01) B21C 47/14 (2006.01) B65H 57/12 (2006.01)

Patent

CA 2214702

A lined pipe to form spirals (11) of a spiral-forming head for spiralling machines for metallic wire, comprising a plurality of anti-wear inserts including an inner hollow for the passage of the metallic wire and an outer surface connecting with the inner surface of the spiral-forming pipe (11), the wear-resistant inserts (10) being substantially all alike with a substantially annular conformation and a longitudinal dimension ("l") mating with the minimum radius of curvature of the spiral-forming pipe (11), rounded front faces (10a) at least partially convex and an inner through hollow (12) comprising a first segment (12a) to lead in and introduce the metallic wire and a second segment (12b) substantially cylindrical following the first. Method to recondition a spiral-forming pipe (11) of the spiral-forming head of spiralling machines for metallic wire, the pipe (11) including inside itself a plurality of wear-resistant inserts defining an inner hollow for the passage of the metallic wire and including an outer surface connecting with the inner surface of the spiral-forming pipe (11), the wear-resistant inserts (10) being inserted/ extracted from the spiral-forming pipe (11) by means of a flexible cable element (13) including, at at least one of its ends (13b), constrainment means at least temporal (15) in contact with the inner hollow (12) and/or the front wall of the wear-resistant inserts (10), the cable element (13) with the wear-resistant inserts (10) being threaded from one mouth (11a, 11b) of the spiral-forming pipe (11) to take the first wear-resistant insert (110a) into an abutment position with an abutment element cooperating with the other mouth (11b, 11a), and therefore clamping the last wear-resistant insert with holding means, the wear-resistant inserts (10) being extracted from the spiral-forming pipe (11) by releasing the holding means and then by introducing the cable element (13) from the other mouth (11b, 11a) of the pipe (11), until the element of temporal constraint (15) comes into contact and then clamps itself against the inner hollow (12) and/or the front wall of the first wear-resistant insert (110a), thus extracting the whole assembly of wear-resistant inserts (10).

Cette invention concerne un tube spiraleur à revêtement intérieur (11) de tête de spiralisation d'une machine à spiraler du fil métallique, qui comprend une série d'inserts anti-usure à âme creuse pour le passage du fil métallique et à surface extérieure adaptée à la surface intérieure du tube spiraleur (11), les inserts anti-usure (10) étant tous sensiblement identiques, c'est-à-dire de configuration sensiblement annulaire, à dimension longitudinale ("l") correspondant au rayon de courbure minimum du tube spiraleur (11), à faces d'extrémité arrondies (10a) et au moins partiellement convexes et à âme creuse (12) comportant un premier segment (12a) servant à enfiler le fil métallique et un deuxième segment (12b) sensiblement cylindrique. L'invention concerne également une méthode de remise en état du tube spiraleur (11) de la tête de spiralisation d'une machine à spiraler du fil métallique, le tube (11) comportant à l'intérieur une série d'inserts anti-usure définissant une âme creuse pour le passage du fil métallique et une surface extérieure adaptée à la surface intérieure du tube spiraleur (11), lesdits inserts anti-usure étant insérés/extraits au moyen d'un câble (13) comportant à au moins un de ses bouts (13b) un moyen de fixation amovible (15) calé dans l'âme creuse et/ou sur la face frontale des inserts anti-usure (10), ledit câble (13) avec les inserts anti-usure (10) étant enfilé par une extrémité (11a, 11b) du tube spiraleur (11) pour caler le premier insert anti-usure (110a) contre une butée agissant de concert avec un moyen de retenue à l'autre extrémité (11b, 11a) pour bloquer en place le dernier insert anti-usure. L'extraction des inserts anti-usure (10) se fait en desserrant le moyen de retenue et en enfilant le câble (13) par l'autre extrémité (11b, 11a) du tube (11) jusqu'à ce que l'élément de fixation amovible (15) se cale dans l'âme creuse (12) et/ou sur la face frontale du premier insert anti-usure (110a), ce qui permet l'extraction en bloc desdits inserts (10).

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