Investigation of deep drawing of square cups using high-strength DP600 and DP800 sheets

Nuri Şen,Vedat Taşdemi̇r,İsa Çolakoğlu

doi:10.30939/ijastech..995381

Abstract

This study investigated the deep drawing of square cups using high-strength du-al phase DP600 and DP800 sheets via both experimental and finite element meth-ods. The limiting drawing ratio (LDR) and wall thickness distribution were exam-ined. The initial thickness of the materials used in the study was equal to 1-mm. The experiments were carried out at room temperature using both Teflon film and graphite spray lubricants at the same time. In terms of LDR, both experimental and numerical results corresponded with each other. A ratio of 1.97 LDR was reached for the DP600 steel and 1.92 LDR for the DP800. Given that the thick-ness distribution between the experimental and numerical results, an accord of over 90% was noticed. For the DP600 steel, the lowest experimental thickness value was 0.864 mm and the lowest numerical value was 0.87 mm. For the DP800 steel, the lowest experimental thickness value was measured to be 0.89 mm while the lowest numerical value was found to be 0.88 mm. In the conclusion, the pre-sent paper proves that the experimental results in the deep drawing of square cups can be achieved with very satisfying results by using numerical methods.

Highlights

Deep drawing is a plastic forming method using the action of a punch to shape sheet metals and it is widely used in sheet metal forming [1,2]
This study investigated the deep drawing of square cups using high-strength dual phase DP600 and DP800 sheets via both experimental and finite element methods
Results of the tests to determine the limiting drawing ratio (LDR) of the dual phase steels in the deep drawing of square cups are given in Fig. 8 (DP600) and Fig. 9 (DP800)

Summary

Introduction

Deep drawing is a plastic forming method using the action of a punch to shape sheet metals and it is widely used in sheet metal forming [1,2]. In recent years, increasing competition and demand have made it a priority to produce safer, cheaper, and environmentally friendly automobiles with a lower weight / strength ratio, including both internal combustion vehicles and the increasingly popular electric vehicles [7,8,9] To meet these demands, dual phase (DP), complex phase (CP), transformation induced plasticity (TRIP), and martensitic (MART) high- and ultra-high-strength steels have been developed. The first is the development of car batteries and the second is the need to reduce the vehicle body weight These issues call for the use of new generation steels and the improvement of forming ratios

Methods

Results

Conclusion