Additive technologies enable flexible manufacturing of complex shaped products layer by layer. Existing 3D printing technologies, which use powder filler material are often slow, expensive and limited to smaller dimensions of the products. Inadequate surface roughness and low precision of manufacturing usually require subsequent machining, using expensive machining centers. In the following master's thesis the development of an alternative system for combined process of robotic wire and arc additive manufacturing using MIG welding and milling of aluminium alloy AlSi5 is presented. The system is analyzed on a representative turbine blade piece. As a result of the work, it has been proven that the developed combined process enables, in comparison with other additive technologies, an economical and productive alternative to the market in the production of complex parts.