Numerical optimization of the blank shape in order to minimize the earring defect in the deep drawing process of square sections

Chavoshi, Mahdi; Amoochi, Abbas; Bayat Kazazi, Mahdi; Najafizadeh, Mohamad Mehdi

doi:10.61186/masm.3.1.67

Numerical optimization of the blank shape in order to minimize the earring defect in the deep drawing process of square sections

Document Type : Original Article

Authors

Mahdi Chavoshi ¹

Abbas Amoochi ²

Mahdi Bayat Kazazi ³

Mohamad Mehdi Najafizadeh ⁴

¹ Department of mechanical engineering, Arak branch, Islamic Azad university, Arak, Iran

² Department of Mechanical Engineering, Faculty of Engineering, Arak University, Arak, 38156-88349, Iran

³ Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran

⁴ Department of mechanical engineering, Faculty of Mechanical Engineering, Islamic Azad University Arak Branch, Arak, Iran

https://doi.org/10.61186/masm.3.1.67

Abstract

The deep drawing process is one of the most widely used metal forming methods, which is widely used in the mass production of parts. The phenomenon of earring has always been one of the defects in deep drawing processes, which causes an increase in material waste and a decrease in the production speed of parts. This phenomenon is caused by plane anisotropy resulting from the cold rolling operation. One of the methods to reduce the earring defect is to optimize the initial blank. In this article, a method to optimize the initial blank and to reduce the earring defect in the process of deep drawing of square sections is presented. For this purpose, the initial blank made of SAE 1015 steel was simulated in Abaqus software. In the following, by using the particular objective function, the initial blank was radially optimized in specific paths. By re-simulating the optimal blank and checking parameters such as; Thickness changes, stress distribution, and strain changes, it was found that if the optimal blank is used, the earring defect is significantly reduced

Keywords

Deep drawing

Optimization

Earing defects

Numerical simulation

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