Investigation of the Effect of Blank Shape on the Sheet Hydroforming Parameters

Abstract:

In the deep drawing processes, the use of an optimal blank shape not only saves the material but also it may reduce the occurrence of defects e.g. wrinkling and tearing. In addition, finding the desirable flange contour, eliminate the trimming step in the deep drawing of parts with flange. The main objective of this study is to optimize the blank shape in order to produce a cylindrical cup with desirable flange contour and investigation of its effect on important parameters. Presently, to overcome this issue, a very expensive and time consuming trial and error method is used. In this study, a systematic method based on sensitivity analysis has been used to find the optimal blank to obtain a desirable flange contour for a cylindrical cup by hydromechanical deep drawing process. With the aid of a well-known dynamic explicit analysis code ABAQUS; optimum initial blank shape has been obtained. With the predicted optimal blank, both computer simulation and experiment are performed and the effect of blank shape on the some parameters such as thickness distribution and forming pressure of the formed cups were investigated. It is shown that formed cup with an optimum blank shape has a better thickness distribution in the rolled direction.

• Periodical: Applied Mechanics and Materials (Volumes 152-154)
• Pages: 1658-1663
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.152-154.1658
• Online since: January 2012
• Authors: S. Ali Zamani, Morteza Hosseinzadeh
• Keywords: Optimal Blank Shape, Sensitivity Analysis, Sheet Hydroforming

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