BSD TORNALAMADA İŞLEME HATALARI VE DÜZELTME STRATEJİLERİ ÜZERİNE BİR DERLEME ÇALIŞMASI/MACHINING ERRORS AND COMPENSATION STRATEGIES IN CNC TURNING: A REVIEW STUDY

Bu calismada bilgisayar sayisal denetimli (BSD) tornalama isleminde is parcasi capinda ortaya cikan boyutsal hatalar ve duzeltme stratejilerine iliskin bir derleme calismasi sunulmustur. Isleme hatalarinin ortaya cikisinda kesme takimlari, isleme sartlari, tezgah hassasiyeti, is parcasi malzemesi ve geometrisi gibi bircok onemli faktor rol oynamaktadir. Duzeltme stratejileri ise Geometrik-isil, Geometrik adaptif kontrol ve Acik moduler olmak uzere uc ana model olarak gelismistir. Hata duzeltme calismalarinin cogunlukla Geometrik adaptif kontrol teknikleri uzerine yogunlastigi ve bu alanda onemli gelismeler saglandigi gorulmekle birlikte sonuclarin uygulanabilirligi halen istenilen duzeyde degildir. Acik moduler kontrol modeli ise kontrol unitelerinin NT tabanli isletim sistemli ve acik kontrol devreli oldugu durumlarda cok avantajlidir. Bu durumda yeni nesil kontrol unitelerinin acik cevrimli ve guncellenebilir Pc’lerden olusmasinin hata duzeltme calismalarinda buyuk gelisme saglayacagi aciktir. In this study, a review of work done on machining errors and compensation strategies in CNC turning is presented. Many important factors like machining conditions and cutting tools, machine tool accuracy, workpiece materials etc. play role on the machining errors. The compensation strategies are arranged as three main model such as Geometric-thermal, Geometric adaptive control and Open modular control. The majority of error compensation studies is focused to Geometric adaptive control techniques. But applicability of these techniques is not at the desired level. The Open modular control model has some advantage in case of control units are open loop and have NT based operation system. Then it is clearly shown the error compensation techniques will be greatly improved if the new generation control units are open loop and updatable PCs.