Experimental Study of Deep Drawing and Redrawing of Sheet Steel
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Date
2022-05
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The Ohio State University
Abstract
Deep drawing is a widely used manufacturing process that involves forming a flat sheet blank into a hollow shape. It is popular in industries such as automotive, household appliances and aerospace. This process is advantageous for low cost & high output production. Due to growing demands, increasingly challenging shapes are sought to be formed. One way of creating these deeper and more difficult parts is through an operation called redrawing. The purpose of this research is to further understand the drawing limits of the redrawing process through experiments. These will serve as benchmark experiments to validate and improve upon existing analytical and numerical models. To carry out the experiments, existing deep drawing tooling was adapted to allow for redrawing testing of Extra Deep-Drawing Quality (EDDQ) steel of 0.8 mm thickness. An Instron servohydraulic testing machine was used to perform the experiments and acquire real time data for deformation and force. Independent process parameters such as blank holding force (BHF) and blank diameter (50 mm to 54 mm) are adjusted to establish the workability envelope, which is the combination of process parameters that leads to successful forming.
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Keywords
Deep Drawing, Redrawing