Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1635718 | Transactions of Nonferrous Metals Society of China | 2015 | 8 Pages |
Abstract
Major defects in forming of conical cups are wrinkles and rupture. Hydrodynamic deep drawing assisted by radial pressure (HDDRP) is a sheet hydroforming process for production of shell cups in one step. In this work, process window diagrams (PWDs) for Al1050-O, pure copper and DIN 1623 St14 steel are obtained for HDDRP process. The PWD is determined to provide a quick assessment of part producibility for sheet hydroforming process. Finite element method is used for this purpose considering the process parameters including pressure path, and the blank material and its thickness. Numerical results are validated by experiments. It is shown that the sheets with less initial thickness and higher strength show better formability and uniformity of thickness distribution on final product. The results demonstrate that the obtained PWD can predict appropriate forming area and probability of rupture or wrinkling occurrence under different pressure loading paths.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Abbas HASHEMI, Mohammad HOSEINPOUR GOLLO, S. M. Hossein SEYEDKASHI,