Abstract

Advanced high strength steels are the group of material with high strength and good formability, because high strength lesser gauge thickness can be used without compromising the function of component. In terms of economic forming process, hydroforming is the manufacturing option which uses a fluid medium to form a component by using high internal pressure. This process gained steep interest in the automotive and aerospace industries because of its many advantages such as part consolidation, good quality of the formed part etc. The main advantage is that the uniform pressure can be transferred to whole projected part at the same time. Low pressure tube hydroforming considered an inexpensive option for forming these advanced high strength steel. This paper investigates the pressurization system used during the low pressure tube hydroforming cycle. It is observed that the usage of ramp pressure cycle during forming the part from low pressure tube hydroforming results in lesser die holding force. Also, the stress, strain and thickness distribution of the part during low pressure tube hydroforming are critically analysed.

Highlights

  • Stamping industries aim to minimize the costs and optimize of its products concerning weight, strength characteristics and rigidity

  • Low pressure tube hydroforming considered an inexpensive option for forming these advanced high strength steel

  • This paper investigates the pressurization system used during the low pressure tube hydroforming cycle

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Summary

Introduction

Stamping industries aim to minimize the costs and optimize of its products concerning weight, strength characteristics and rigidity. Seeking for alternative production a process, hydroforming—the manufacture of hollow bodies with complex geometries by means of fluid pressure—has been shown to offer an interesting technical and economic potential to sheet metal manufacturers. Hydroforming technology can achieve weight reduction of about 30% in comparison to conventionally manufactured components [2]. Hydroforming is coming as an effective manufacturing process, because it can be applied to the manufacturing of complex structural components into a single body with high structural stiffness. Tube hydroforming has been successfully developed in industry such as in the manufacturing of the components of automotive vehicles [3]. Steel tube has excellent strength to weight ratio and its applications can effectively reduce vehicle weight and improve vehicle stiffness

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