Patent ID: 7631408
Filing Date: 2009-12-15
Classification: B23P,Y10T

Abstract:
1. A method of manufacturing a thin wall isogrid casing by a machining process, the method comprising the steps of: mating a casing with a support, the support provided with a substantially continuous support surface engaging at least part of the inner or outer surface of the casing; machining a plurality of recessed pockets in the inner or outer surface of the casing opposite the surface engaged by the support, whereby the support reacts loads acting on the casing by a machining tool during machining, thereby minimizing distortion of the casing and tearing of the pockets being formed, wherein, during the mating process, the casing is deformed such that the support surface engages substantially the whole of the inner or outer surface of the casing and determining dimensional distortions in the support before mating with the casing; and adjusting positional control parameters of the NC controlled cutter or drill in accordance with the determined distortions.