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Abstract

The springback is difference between the die geometry and bended sheet geometry. This phenomena is a general shaping problem in sheet metal forming. In V bending, the numerous factors such as material (material type, thickness, anisotropy, yield strength, Young’s modulus, strain hardening etc.), process (holding time, bending temperature, friction, bending force etc.) and die geometry (bending angle, bending radius etc.) must be considered. Therefore, numerous empirical and finite element analysis studies have been carried out by many researchers. In this study, the related studies with V bending operation has been compiled and revived

Keywords

• Springback, V bending, bending dies

V BÜKMEDE GERİ ESNEME DAVRANIŞLARI

Abstract

Geri esneme, ürüne kalıplama sırasında verilen şekil ile kalıplama sonrası elde edilen şekil arasındaki fark olup, genellikle sac metal bükme işlemlerinde karşılaşılan önemli bir şekil verme problemidir. V Bükmede, malzeme parametreleri (malzeme türü, kalınlık, anizotropi, akma dayanımı, Young modülü, pekleşme vb.), proses parametreleri (ütüleme süresi, bükme sıcaklığı, sürtünme, bükme kuvveti vb.) ve kalıp parametreleri (bükme açısı, bükme radyüsü vb.) gibi çok sayıda parametrenin dikkate alınması gerekmektedir. Bu nedenle; malzeme, proses ve kalıp parametrelerinin göz önünde bulundurulduğu çok sayıda deneysel ve sonlu elemanlar yöntemleriyle bilgisayar destekli sayısal analiz çalışmaları yapılmıştır. Bu çalışmada, V bükme sonrası şekillendirilen parçalarda meydana gelen geri esneme davranışları ile ilgili yapılmış olan çalışmalar derlenmiş ve değerlendirilmiştir.

Keywords

• Geri esneme, V bükme, bükme kalıpları

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