Abstract
By sheet metal forming processes the forming limits and part characteristics are defined through the process specific loads. In deep drawing processes the maximum deep draw ratios as well as the springback behaviour of the metal parts are depending on the stress distribution in the part material during the forming process. While exceeding the load limits, a failure in the material occurs, which can be avoided by additional force transmission activated in the deep drawing process before the forming limit of material is achieved. This contribution deals with numerical investigation of process effect caused by additional force transmission regarding the extension of the process limits. Here, the steel material HCT 600X+Z (1.0941) in thickness s0 = 1.0 mm is analyzed numerically using the anisotropic model Hill48. This model is validated by the means of cup test by Swift. Both, the FEA of conventional and forming process with additional force transmission are carried out. The numerical results are compared with reference geometry of rectangle cup.
Highlights
1 Introduction and motivation Increasing globalization, resulting in a rapid change of the industrial market and the society, strictly expected regulation of CO2 emissions and the increasing scarcity of resources are the main drivers of the automotive industry
By production of car body parts made from sheet metals, the deep drawing and bending are crucial
Regarding the bottom area the dimensional deviation analysis shows a positive deviation of dz = 1.186 mm for conventional deep drawing and dz = 0.113 mm by process with additional force transmission, which means a geometrical improvement of the rectangle cup by 6.16% regarding the part bottom area
Summary
This content has been downloaded from IOPscience. Please scroll down to see the full text. 179 012006 (http://iopscience.iop.org/1757-899X/179/1/012006) View the table of contents for this issue, or go to the journal homepage for more. Download details: IP Address: 194.95.157.184 This content was downloaded on 25/04/2017 at 08:30. Please note that terms and conditions apply. A numerical analysis on forming limits during spiral and concentric single point incremental forming M L Gipiela, V Amauri, C Nikhare et al Design and Analysis of Deep Drawing Process on angular Deep Drawing Dies for Different Anisotropic Materials P Venkateshwar Reddy, Perumalla Janaki Ramulu, G Sandhya Madhuri et al Influence of the tool temperature increment on the coefficient of friction behavior on the deep drawing process of HSS I Gil, L Galdos, E Mugarra et al Modelling of fracture effects in the sheet metal forming based on an extended FLC evaluation method in combination with fracture criterions P Hora, M Gorji and B Berisha A Triaxial Failure Diagram to predict the forming limit of 3D sheet metal parts subjected to multiaxial stresses F Rastellini, G Socorro, A Forgas et al Development of an intelligent tool system for flexible L-bending process of metal sheets Ming Yang, Ken-ichi Manabe and Hisashi Nishimura Cluster compaction of two-dimension spherical particles binary mixture as model of forming process of an asteroid S Viridi and B Dermawan
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