Patent ID: 8448841
Filing Date: 2013-05-28
Classification: B23K,F01D,H02K

Abstract:
1. Method for manufacturing a rotor by welding a plurality of elements together, at least one element having a body with at least one cavity and at least one surface to be welded to a surface of an adjacent element, the method comprising: stacking the elements vertically one above the other to form a pile with facing surfaces to be welded together defining slots, wherein the cavity or cavities of adjacent elements define at least one bore that extends over at least a portion of the pile, welding adjacent elements together within the slots, purging the bore with an inert gas or mixture during welding, welding all but at least one of the slots at a first end of the bore before welding the slots at a second end of the bore and then welding the at least one of the slots at the first end of the bore last.