Rigid body dynamics in optimization of the machine tool vibroisolation

Abstract

Original scientific paper Modern design of the machine tool treats the suspending parts as a crucial element of the effective vibration isolation. Therefore the suspending items are specifically developed and subjected to extensive tests before being applied on real objects. These elements ensure accurate levelling and appropriate vibration damping. Usually selection of inadequate support element causes intensive disturbing effects in machining. The paper presents dynamics analysis of the machine tool suspended on flexible mountings. The overall analysis is conceived on a rigid body dynamics. This method enables selection of an optimal supporting configuration. Further on such an effective suspension design prevents a need for expensive monitoring of the dynamic characteristics of the mechanical system, i.e. machine tool and supports. The paper explores dynamics of a real, flexibly supported machine tool. Results are obtained with the assistance of the "SUPPORT" software. Finally the theoretical and computational statements are approved throughout extensive site measurements on the machine tool body with appropriate instrumentation. Keywords: dynamics analysis; experiment; machine tool; software; transfer function Dinamika sustava krutih tijela u optimizaciji vibroizolacije alatnih strojevaIzvorni znanstveni članak Suvremeni razvoj alatnih strojeva tretira oslonce kao presudne elemente u vibroizolaciji. Zbog toga su oslonci posebno razvijeni i podvrgnuti opsežnim testovima prije primjene na realnim objektima. Oni osiguravaju precizno niveliranje i amortizaciju vibracija. Neodgovarajući izbor oslonaca uzrokuje neželjene efekte u procesu obrade. Rad prezentira analizu dinamike alatnog stroja oslonjenog na fleksibilne oslonce. Ukupna analiza je koncipirana na dinamici krutih tijela. Ova metoda omogućava izbor optimalne konfiguracije oslanjanja. Ovako efikasan razvoj oslanjanja eliminira potrebu za skupim nadzorom strojnog sustava, tj. alatnog stroja i oslonca. U radu je dana analiza dinamike fleksibilno oslonjenog alatnog stroja u realnim uvjetima. Rezultati su dobiveni pomoću softvera SUPPORT. Konačno, teorijski i računarki rezultati potvrđeni su opsežnim mjerenjima na alatnom stroju, odgovarajućom mjernom opremom.

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