| 摘要 |
To enable safe coiling of very thin metals at high speed, the invention discloses a coiler comprising a mandrel of considerably smaller diameter then prior art mandrels, enabling said mandrel to be directly driven by an electric motor without using reduction gears. The coil outer diameter is also reduced, the result being a coiler having far lower polar moment of inertia than prior art coilers, therefore greatly reducing the incidence of tension errors and strip breaks. The mandrel is constructed specifically for operation with a spool upon which the coil is wound, and incorporates the novel feature of concentric expansion using a plurality of circumferentially oriented wedges, which ensures uniform support and grip of the spool bore, holding said spool and coil concentric with the axis of the mandrel. |
