STATISTICAL ANALYSIS OF PARAMETERS (TENSILE STRENGTH AND ELONGATION) FOR TIN PLATE STAMPING USING ERICHSEN TEST
ANISOTROPY, MECHANICAL FORMING, STAMPING, TINPLATE, COMPUTER SIMULATION.
This study investigates the causes of failures in the stamping process of metal lids manufactured from 0.36 mm thick tinplate. Through mechanical tests (traction, Erichsen and anisotropy analysis) and computational simulations using the Finite Element Method (FEM), critical factors related to the anisotropic properties of the material and process parameters were identified. The experimental results indicated specific variations in the anisotropy index (r) and mechanical strength in different lamination techniques, while the computer simulation highlighted regions susceptible to ruptures and deformations. An analysis of the Forming Limit Curve (CLC) revealed that the critical stress point is associated with part specifications, influenced by process configurations and material variability. As the results of the tensile test showed a clear gap between maximum tension and elongation between tests, a statistical tool was used to delve deeper, using pvalue classification to analyze the significance of the result. This work concludes that adjustments in tooling, material hardness control and friction intervals can reduce defects such as wrinkles and breaks, ensuring greater reliability in the final product.