2244 KB26 KB199920252013Dauksevicius, RolanasGaidys, RimvydasMikuckyte, SandraOstaševičius, Vytautasletnik:59številka:6str. 351-357, SI 67ISSN:0039-2480COBISSID:13073947URN:URN:NBN:SI:doc-B45YMJXXenAssociation of Mechanical Engineers and Technicians of Slovenia et al.Zveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikaksialnostaxial modefinite element modelhrapavostmodel s končnimi elementipre-twisted cantileverroughnessvibracijsko odrezovanjevibration cuttingvisokotrdne kovinske zlitinevnaprej zavite konzoleStudy of vibration milling for improving surface finish of difficult-to-cut materials|This work studies the influence of high-frequency excitation of a cutting tool during end milling of workpieces made of difficult-to-cut metallic alloys. It is demonstrated that high-frequency vibrations superimposed onto the continuous movement of the tool lead to milling process stabilization with superior surface finish in comparison to conventional machining. A finite element model of the vibration milling tool was built and verified experimentally. The model treats the tool as an elastic pre-twisted structure (mill cutter) characterised by its natural vibration modes. The resonance frequencies of the axial vibration mode of cutters of two different lengths were predicted numerically and subsequently used for excitation of the vibration milling tool during cutting experiments. Qualitative and quantitative characterization of the surface quality of the machined stainless steel and titanium alloys was performed. Measurement results have confirmed that excitation of a specific tool mode is a prerequisite for achieving maximal efficiency of the vibration milling process. Statistical analysis of the collected roughness measurement data identified factors that most significantly contribute to the improved surface finish of the workpiecesTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo