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2017, vol. 72, br. 3, str. 367-373
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Modeli dinamičkog procesa formiranja stugotine
Models of dynamic process of forming stugotine
Univerzitet u Prištini sa privremenim sedištem u Kosovskoj Mitrovici, Fakultet tehničkih nauka
e-adresa: anicic@gmail.com
Sažetak
U ovom radu su analizirani modeli dinamičkog procesa formiranja strugotine. Oscilovanje elemenata obradog sistema u principu je uslovljena dinamičkim karakterom procesa formiranja strugotine. Potrebno je da neka frekvencija sopstvenog oscilovanja elemenata sistema alat - obradak - pribor - mašina bude približno jednaka frekvenciji formiranja segmenata strugotine da bi došlo do pojave samopobudnih oscilacija (Landberg). Istraživanjima je utvrđeno da na proces formiranja strugotine ne utiču karakteristike krutosti mašine (Ferrarezzi). Danas se u svetskoj literaturi susreće veliki broj analitičkih i mehanističkih modela, koji sa većom ili manjom tačnošću realno opisuju realni proces formiranja strugotine. Zadnjih godina, sa pojavom moćnih računara i aplikativnih programa baziranih na metodi konačnih elemenata (MKE) modeliranje dinamičkog procesa formiranja strugotine, kao i drugih procesa koji se odvijaju u zoni rezanja, se vrše numeričkim metodama.
Abstract
The oscillating elements obradog system in principle is conditional on the dynamic character of the process of formation filings. It is necessary to let the frequency of natural oscillation elements of the system tool - workpiece - accessories - machine is approximately equal to the frequency of forming segments filings to lead to the emergence of chatter (Landberg). Studies have found that the process of forming filings do not affect the characteristics of rigidity machines (Ferrarezzi). Today the world literature meets a large number of analytical and mechanistic models, with more or less accuracy realistically describe the real process of forming filings. In recent years, with the advent of powerful computers and application programs based on the finite element method (FEM) modeling of the dynamic processes of formation filings, as well as other processes that take place in the cutting zone, are the subject of numerical methods.
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