This paper uses numerical simulation to study a method in combined drawing process with thinning the wall when drawing of a cylindrical cup of sheet metal. The software Deform 2D is used to examine effect of die design parameters (inclination of die) on deformation possibility of metal. Based on simulation results, it is possible to select appropriate die design parameters (cone die) and improve deformability and improve product quality. | Vietnam Journal of Science and Technology 56 (3) (2018) 397-404 DOI: NUMERICAL SIMULATION TO STUDY EFFECT OF DIE DESIGN PARAMETERS ON DEFORMATION POSSIBILITY OF METAL ON COMBINED DRAWING Nguyen Manh Tien*, Tran Duc Hoan, Nguyen Truong An, Pham Manh Tuan Military Technical Academy, 236 Hoang Quoc Viet, Bac Tu Liem, Ha Noi * Email: manhtiennguyen84@ Received: 3 February 2017; Accepted for Publication: 2 April 2018 Abstract. This paper uses numerical simulation to study a method in combined drawing process with thinning the wall when drawing of a cylindrical cup of sheet metal. The software Deform 2D is used to examine effect of die design parameters (inclination of die) on deformation possibility of metal. Based on simulation results, it is possible to select appropriate die design parameters (cone die) and improve deformability and improve product quality. Keywords: die design parameters, combined drawing, deformation, ironing. Classification numbers: ; , , . 1. INTRODUCTION The ironing process used to make details which have wall thickness thinner than bottom. Currently, the details of this type often is formed with normal deep drawing process of the first step, then the wall thickness is reduced in the next steps (Figure 1) [1]. Figure 1. The ironing process. Nguyen Manh Tien, Tran Duc Hoan, Nguyen Truong An, Pham Manh Tuan To reduce number of step on ironing process (by improving the ability of the material deformation), the method of deep drawing applied is drawing combined. The drawing combined which reduce diameter and wall thickness of detail are shown in Figure 2 [2]. For drawing combined process of the first step, the parameter of die (geometry of die) influence on the process of deformation, stress, deformation ability, drawing force and product quality (height of details, uniformity of wall thickness etc.). Two types of die design parameters are presented in the study: conical die (Figure .
