SCGADUB1180 yüksek mukavemetli sacýnda proses parametrelerinin geri esneme davranýþýna etkisinin deneysel olarak incelenmesi

Dayanýmý yüksek ve hafif yüksek mukavemetli çelikler, otomotiv sektöründe yaygýn olarak kullanýlmaktadýr. Yüksek mukavemetli saclarýn þekillendirilmesinde geri yaylanma, yýrtýlma ve incelme kadar önemli bir problemdir. Bu çalýþmada, SCGADUB1180 yüksek mukavemetli sacýnýn çekme testleri yapýlarak mekanik özellikleri tanýmlanmýþ ve V büküm prosesinde, zýmba hýzý, kalýp açýsý, ütüleme süresi, hadde yönü parametrelerinin geri yaylanmaya etkisi deneysel olarak araþtýrýlmýþtýr. Literatürde, SCGADUB1180 yüksek mukavemetli sacýnýn þekillendirilmesi ve geri yaylanma davranýþlarý üzerine araþtýrmaya rastlanmamýþtýr. Araþtýrma sonucunda, zýmba hýzýnýn artmasýyla geri yaylanma miktarlarý artmýþtýr. Ütüleme süresinin artmasýyla geri yaylanma miktarý azalmýþtýr. O° hadde yönünde en az geri yaylanmalar görülmüþtür. Kalýp açýsýnýn artmasýyla geri yaylanma miktarlarý artmýþtýr. Elde edilen deneysel sonuçlar, yüksek mukavemetli saclarýn geri yaylanma davranýþlarýn tahmin edilip, bükme prosesinde mekanik davranýþlarýnýn anlaþýlmasýna fayda saðlayacaktýr. Bu faktörlerin kalýp tasarýmý ve proses oluþumu sýrasýnda dikkate alýnmasý final parça tasarýmýnda baþarýlý sonuçlarýn alýnmasýna yardýmcý olacaktýr.

Experimental investigation of the effect of process parameters on springback behavior of SCGADUB1180 high strength sheet

High-strength steels with high strength and light weight are widely used in the automotive industry. Springback is as important a problem as tearing and thinning when forming high-strength sheets. In this study, the mechanical properties of SCGADUB1180 high strength sheet were determined by tensile tests and the effect of punch speed, bending angle, holding time, rolling direction parameters on springback in the V bending process was experimentally investigated. In the literature, there has been no research on the shaping and springback behavior of SCGADUB1180 high-strength sheet metal. As a result of the research, the amount of springback increased with increasing punch speed. With increasing holding time, the amount of back spring has decreased. At least springbacks have been observed in the direction of O° rolling. As the bending angle increased, the amount of springback increased. The experimental results obtained will help to estimate the springback behavior of high-strength sheets and understand their mechanical behavior in the bending process. Taking these factors into account during mold design and process formation will help to achieve successful results in final part design.