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AssigneeAugust Thyssen-Hutte Aktienges.
InventorsHermann Th. Brandi, deceased, Herbert Luckow
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Very large diameter metal shafts for turbines and electric generators, and other large structural metal parts, can be made in one piece to a high quality without occlusions, cavities, segregations, and cracks by building the part up layer by layer, each layer being formed by deposition of molten metal by welding along neighbouring tracks which together cover the area over which the layer is to be deposited. The weld deposition of the metal may be effected by a welding head which is moved longitudinally along the part, and if the part is simultaneously rotated the metal is deposited along a helical path in forming a layer. A plurality of welding heads may be used so that metal is deposited simultaneously at different positions during the construction of each layer.
A method for manufacturing relatively large integrated structural parts of metal, particularly unitary shafts for turbines and electrical generators, said method comprising the steps of providing an initial support member, depositing on said support member an initial layer of weld metal by a welding operation consisting essentially of formation of weld beads in the absence of cooling in the area of said weld beads along contiguous tracks to form said initial layer as a continuous layer of deposited weld metal formed by said weld beads, and depositing a plurality of further continuous superposed layers of weld metal in separate succeeding welding operations each consisting essentially of formation of weld beads in the absence of cooling in the area of said weld beads, said depositing being conducted to form each of said initial and further superposed layers as separate discrete layers of weld metal individually separately formed in succeeding welding operations to manufacture said large integrated structural part essentially exclusively of said support member and said discrete separately formed superposed layers of weld material.
Dependencies are inferred from the claim text.