Patent ID: 8869583
Filing Date: 2014-10-28
Classification: B21D

Abstract:
1. A swaging apparatus for use for reducing the dimensions for a multi-walled tube including a support, a series of external compression dies, said external compression dies operatively supported by the said support, there being an external compression die having a flat surface provided in alignment with each wall of the multi-wall tube being swaged and which said compression dies when actuated, directs said compression dies against the surface of the tube to swage it and reduce its dimensions; a collapsible mandrel, said collapsible mandrel including a tapered arbor, a series of internal compression dies, said internal compression dies mounted upon said tapered arbor, and said collapsible mandrel, when actuated, forcing said internal compression dies against the interior surface of the tube to be swaged, in alignment with the exterior compression dies, and exerting a lesser force upon the internal walls of the tube, than the pressure exerted by the external compression dies upon said tube to prevent buckling of the tube during performance of a swaging operation.