| 摘要 |
A coated tube for forming spirals (11) of a spiral head former, for spiral machine formers for metallic wire which comprises a plurality of inserts against the wear that include an internal hollow for the passing of the metallic wire and an external surface which connects with the internal surface of the spiral tube former (11) the wear resistant inserts (10) all being substantially similar with a substantially annular formation and a longitudinal dimension ("1") which is coupled with the curvature minimum radius of the spiral tube former (11), round frontal faces (10a) at least partially convex and an internal hollow (12) comprising a first segment (12a) for introducing the metallic wire and a second segment (12b) substantially cylindrical followed by the first. A method for re-conditioning a spiral tube former (11) of the spiral head former of spiral machine former for metallic wire, the tube (11) including within the same a plurality of wear resistant inserts which define an internal hollow for the case of the metallic wire and that includes an external surface that connects with the internal surface of the spiral tube former (11), inserting/extracting the wear resistant inserts (10) of the spiral tube former (11) by means of a flexible cable element (13) including at least in one of its end (13b), a limiting element at least temporarily (15) in contact with the internal hollow (12) and/or the frontal wall of the wear resistant inserts (10), threading the cable element (13) with the wear resistant inserts (10) from a mount (11a, 11b) of the spiral tube former (11) for carrying the first wear resistant insert (110a) until the limit position, a limit element that cooperates with the other mouth (11b, 11a) and consequently fastening to the last wear resistant insert with the fastener element, extracting the wear resistant inserts (10) from the spiral tube former (11) through the release of the fastener element and then by means of the introduction of the cable element (13) from the other mouth (11a, 11b) of the tube 811) until the temporary limitation element (15) comes into contact and then against the internal hollow (12) and/or frontal wall of the first wear resistant insert (110a), extracting in this way all the wear resistant insert (10) assemblies.
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