Finite Element Numerical Simulation and Research on Key Process Parameters for Cold Stamping of Stainless Stee Lunch Boxes
ZUO Liming
YONG Kai
YANG Ya
WANG Zhengbing
YANG Jun
Abstract：To resolve process defects such as meal slot springback,sheet thinning,and cracking,numerical simulation of the stamping process for a 304 stainless steel lunch box was conducted using the ANSYS LS-DYNA module.With mold support spring preload,stamping speed,and friction coefficient as optimization variables,and post-stamping minimum thickness,maximum thickness,and maximum meal slot springback angle as objectives,multi-objective optimization was performed on process parameter test groups via Design-Expert software to determine the optimal parameters(stamping speed 37.5 mm/s,friction coefficient 0.18,spring preload 215 kN),followed by simulation validation.Results indicate that the maximum meal slot springback angle is less than 2°,the thickness of the meal slot's surrounding area ranges from 0.7 to 1.1 mm,and both plastic strain and maximum equivalent stress are below the risk threshold.The forming effect meets design expectations.Trial production and mass production verify that the forming quality is stable and reliable.
Keywords：cold stampingequivalent stressplastic strainmulti-objective optimization
Publication Date：2025-07-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 49-57 )