| 摘要 |
<p>A method of manufacturing a thin wall isogrid or the like casing by a machining process comprising the steps of: mating a surface of a casing precursor (10,50) with a substantially continuous support surface (20,60) of a hollow support sleeve (18, 58); engaging an engagement surface (26, 66) of a deformation member (24, 64) with an engagement surface (22,62) of the support sleeve (18,58), the engagement surface (22, 62) of the support sleeve (18,58) being opposite the support surface (20,60) and the deformation member (24,64) being co-axially arranged with the support sleeve (18,58); axially displacing the support sleeve (18,58) and deformation member (24,64) relative to one another, the deformation member (24,64) engagement surface (22,62) and support sleeve (18,58) engagement surface (22,62) being configured such that the support sleeve (18,58) is deformed by the deformation member (24,64) by the relative axial displacement in order to mate the support surface (20,60) with substantially the whole of the surface (12) of the casing precursor (10,50) to be machined; and machining a plurality of recessed pockets in the said surface (12) of the casing precursor (10,50) opposite the surface (14,54) engaged by the said support sleeve (18,58); whereby the support sleeve (18,58) reacts loads acting on the casing precursor (10,50) by a machining tool during machining, thereby minimising distortion of the casing precursor (10,50) and tearing of the pockets being formed.</p> |
