Effect of Fluid Pressure on Weld-Line Movement and Thickness Distribution in Hydro-Mechanical Deep Drawing of Tailor-Welded Blanks (TWBs)

علوم کاربردی و محاسباتی در مکانیک

Article 5, Volume 23, Issue 1, May 2012, Pages 53-66   

Document Type: Original Article

DOI: 10.22067/fum-mech.v23i1.12822

Authors

Emad Rahimi; Hasan Moslemi Naeini^* ; Hamed Deilami Azodi; Siamak Mazdak; MohammadMahdi Kasaee

Abstract

Use of Tailor-Welded Blanks (TWBs) in production has significant advantages such as weight and cost reduction. However, their application requires processes that increase their poor formability in comparison to base materials. One of these procedures is the use of fluid pressure in sheet metal forming. In this paper hydro-mechanical deep drawing process of tailor-welded low carbon steel (St12) blanks with different thicknesses is studied using FEM and verified experimentally, and effect of fluid pressure on weld-line movement and thickness distribution is investigated. Results of FEM are in good agreement with experiments. Results show that there is an optimum value of final pressure in which the least maximum thinning occurs. Furthermore, using fluid pressure we can obtain higher drawing ratios and also reduce the weld-line movement compared to conventional deep drawing.

Keywords

Tailor-Welded Blank (TWB); Hydro-Mechanical Deep Drawing; Fluid Pressure; Weld-Line Movement; Thickness Distribution

References