Review of Recent Development in Deep Drawing Process
Deep drawing is a common metal forming process used to manufacture recessed threedimensional parts from flat sheet metals. The research in deep drawing has been generic over the last few decades and various aspects of this process have been investigated. The paper aims to review the following aspects of deep drawing process that affect the quality of the product, tooling life and process design: i. The development of a theoretical model for the isoviscous hydrodynamic lubrication of deep drawing and its comparison with experimental results, the effect of lubrication on die expansion that could be used as an indirect means of detecting and measuring the presence of a hydrodynamic lubricant film thickness. ii. The improvement in deep drawing tooling that covers analysis for the blank holder, the effect of punch geometry on the deep drawing process, and introducing an alternative tooling materials for batch production. iii. The recent developments and future direction of research.
Hydrodynamic lubrication of the ironing process
A theoretical model is presented to calculate the lubricant film thickness in an unsteady hydrodynamic lubrication of cup‐shaped products to be formed by the ironing process. The model covers the development of hydrodynamic lubrication in various phases of the ironing process. The model provides equations for estimating the lubricant film thickness for each phase.
An Isoviscous Hydrodynamic Lubrication Analysis for Deep Drawing
An isoviscous steady hydrodynamic lubrication model for a deep drawing process was developed. Equations to calculate film thickness, radial, and drawing stresses are presented. The die inlet film thickness is related to properties of lubricant and sheet metal. The value of drawing stress under lubrication are compared with frictionless and dry friction analyses.