Patent ID: 9376219
Filing Date: 2016-06-28
CPC Classification: B29C,B64F,F16H,Y02T,Y10T

Claim Text:
1. An actuating device for producing an airplane fuselage, comprising: a lamination mandrel that includes a plurality of sectors, each of the sectors including a screw-nut screw actuating system, the actuating system comprising a threaded rectilinear element extending along a radial rotational axis, a nut screw and motor, wherein said threaded rectilinear element comprises an internal shaft that is made of a first material and that extends along said radial rotational axis and an external tubular portion made of a second material that includes a first end portion and is axially mounted on a respective end portion of said internal shaft that is externally provided with threading, said first material having a dilatation coefficient that is smaller than the dilatation coefficient of the second material, wherein constraint means are provided between said internal shaft and said external tubular portion that are adaptable to prevent angular displacement of the external tubular portion with respect to the internal shaft and allow a linear sliding of the external tubular portion with respect to the internal shaft so that when a thermal stress applied to said threaded element producing a sliding of a second free end portion of the external tubular portion with respect to the internal shaft, the thermal stress produces a limited overall elongation of the threaded rectilinear element, which depends only on a reduced elongation of the first material and each of the sectors remains in an expanded lamination position following said thermal stress.