Improved prediction of stability lobes with extended multi frequency solution

Industrial application of chatter prediction in cutting processes requires reliable and fast stability calculations for a given machining operation, and also the reconstruction of corresponding stability charts. An efficient and robust technique is developed for this task when no time is available for the mathematical treatment of FRFs that represent the complex real-world machine tool dynamics possibly measured with rotating spindle and/or moving tool-holder between two subsequent cutting operations. In a real-case study, an extended multi-frequency-solution is introduced to present the effects of imperfect FRFs of diagonal, symmetric, non-symmetric or filtered types on the computed stability charts that provide instant information to avoid harmful vibrations.