Cutting parameters selection for sintered alloy AlSi10Mg longitudinal turning

The paper presents issues concerning the machined surface quality obtained after turning of two parts made of AlSi10MG alloy, the first manufactured by laser sintering of powder, the second one made as a cast. Taguchi method has been applied in methodology. Sintered material showed the occurrence of breaches and burrs which negatively affected the roughness parameters and shape errors. The reason was incomplete remelting of sintered particles, which does not form a homogeneous structure and in which the cohesion forces are smaller than in the cast material. The algorithm for the feed value selection was developed considering the dimensional accuracy. A correction factor for the theoretical roughness value determination on the basis of the machined surface measurements was proposed. The algorithm was verified on the example of the shaft turning, making the reduction of the initial feed value by 55%, which also reduced the cutting force F-c by 47%. (C) 2019 Elsevier Ltd. All rights reserved.