MACHINING ERRORS AND COMPENSATION STRATEGIES IN CNC TURNING: A REVIEW STUDY

Year 2006, Volume: 22 Issue: 1, 142 - 151, 01.02.2006

Eyyüp Sabri Topal Can Çoğun

Abstract

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.

Keywords

Machining error, BSD, Computer aided manufacturing

BSD TORNALAMADA İŞLEME HATALARI VE DÜZELTME STRATEJİLERİ ÜZERİNE BİR DERLEME ÇALIŞMASI

Abstract

Bu çalışmada bilgisayar sayısal denetimli (BSD) tornalama işleminde iş parçası çapında ortaya çıkan boyutsal hatalar ve düzeltme stratejilerine ilişkin bir derleme çalışması sunulmuştur. İşleme hatalarının ortaya çıkışında kesme takımları, işleme şartları, tezgah hassasiyeti, iş parçası malzemesi ve geometrisi gibi birçok önemli faktör rol oynamaktadır. Düzeltme stratejileri ise Geometrik-ısıl, Geometrik adaptif kontrol ve Açık modüler olmak üzere üç ana model olarak gelişmiştir. Hata düzeltme çalışmalarının çoğunlukla Geometrik adaptif kontrol teknikleri üzerine yoğunlaştığı ve bu alanda önemli gelişmeler sağlandığı görülmekle birlikte sonuçların uygulanabilirliği halen istenilen düzeyde değildir. Açık modüler kontrol modeli ise kontrol ünitelerinin NT tabanlı işletim sistemli ve açık kontrol devreli olduğu durumlarda çok avantajlıdır. Bu durumda yeni nesil kontrol ünitelerinin açık çevrimli ve güncellenebilir Pc’lerden oluşmasının hata düzeltme çalışmalarında büyük gelişme sağlayacağı açıktır.

Keywords

İşleme hatası, BSD, Bilgisayar destekli imalat.

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