The Study of Effective Process Parameters in the Warm Sheet Hydroforming

Document Type : Research Article

Authors

1 material forming research center, Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Mazandaran, P.O.Box 484

2 Material Forming Research Center, Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Mazandaran, P.O.Box 484

Abstract

Nowadays, in different industries, especially in the automotive industry, the use of lightweight materials such as aluminum alloys has been increased in order to reduce the weight of parts and fuel consumption. These alloys have low formability at room temperature. To overcome this problem, forming at elevated temperatures is proposed. In this paper, formability of 5052 aluminum alloy sheet under hydrodynamic deep drawing assisted by radial pressure process has been studied at the warm condition. Initially, after analyzing the effect of geometric parameters on thickness distribution and punch force, the effects of temperature, fluid pressure and punch speed on thickness distribution, punch force and limiting drawing ratio have been investigated. Also, the effects of forming temperature and punch speed on the minimum thickness of the workpiece have been studied using the Taguchi method. Based on the obtained results, higher temperature in warm isothermal and non-isothermal states leads to a decrease and increase in the part thickness, respectively, while higher punch speed helps in thickness improvement. It was found that the limiting drawing ratio increases with increasing temperature in non-isothermal state and with decreasing temperature in an isothermal condition. In addition, an increase in fluid pressure leads to a higher limiting drawing ratio.

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Main Subjects

References

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Amirkabir Journal of Mechanical Engineering
Volume 51, Issue 5
November and December 2019
Pages 1057-1068

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