Hydrodynamic deep drawing of double layered conical cups

Hydrodynamic deep drawing assisted by radial pressure is an advanced sheet forming technology with great advantages such as higher drawing ratio, good surface quality and higher dimensional accuracy. In this process, both the bottom surface and the peripheral edge of sheets are under hydrodynamic pr...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2016-01, Vol.26 (1), p.237-247
Main Authors: JALIL, Alireza, HOSEINPOUR GOLLO, Mohammad, SHEIKHI, M. Morad, SEYEDKASHI, S.M. Hossein
Format: Article
Language:English
Subjects:
Aluminum base alloys
Computational fluid dynamics
conical cup
critical pressure
Deep drawing
double layered sheet
Failure
Fluid flow
Forming
hydrodynamic deep drawing
Hydrodynamics
Low carbon steels
Mathematical models
radial pressure
Rupture
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Summary:Hydrodynamic deep drawing assisted by radial pressure is an advanced sheet forming technology with great advantages such as higher drawing ratio, good surface quality and higher dimensional accuracy. In this process, both the bottom surface and the peripheral edge of sheets are under hydrodynamic pressure, so that the forming procedure is more uniform with low failure probability. Multi-layered sheets with complex geometries could be formed more easily with this technique compared with other traditional methods. Rupture is the main irrecoverable failure form in sheet forming processes. Prediction of rupture occurrence is of great importance for determining and optimizing the proper process parameters. In this research, a theoretical model was proposed to calculate the critical rupture pressure in production of double layered conical parts with hydrodynamic deep drawing process assisted by radial pressure. The effects of other process parameters on critical rupture pressure, such as punch tip radius, drawing ratio, coefficient of friction, sheet thickness and material properties were also discussed. The proposed model was compared with finite element simulation and validated by experiments on Al1050/St13 double layered sheets, where a good agreement was found with analytical results.
ISSN:1003-6326
DOI:10.1016/S1003-6326(16)64109-2