Paper Titles
Boss Formability of Nano-Structured Aluminium Alloys at Elevated Temperatures
p.907
The Bauschinger Effect in AA 6111
p.913
Numerical Analysis on the Extruded Volume and Length Ratios of Backward Tube to Forward Rod in Combined Extrusion Processes
p.919
An Analysis on the Forming Characteristics of AA 6063 Aluminium Alloy in Radial-Forward Extrusion Process
p.925
An Analysis on the Surface Expansion of Aluminium Alloys in Backward Can Extrusion Process
p.931
The Influence of Die Geometry on the Radial Extrusion Processes with AA 6063 Aluminium Alloy
p.937
An Analysis on the Force Requirement of Combined Operations for Forward and Backward Tube Forming
p.943
An Analysis on the Forming Load of AA 2024 Aluminium Alloy in Combined and Sequence Operation Process
p.949
The Forming Characteristics of AA 2024 Aluminium Alloy in Radial Extrusion Process Combined with Backward Extrusion
p.955

An Analysis on the Surface Expansion of Aluminium Alloys in Backward Can Extrusion Process

Article Preview

Abstract:

This paper is concerned with the analysis on the surface expansion of AA 2024 and AA 1100 aluminum alloys in backward extrusion process. Due to heavy surface expansion appeared usually in the backward can extrusion process, the tribological conditions along the interface between the material and the punch land are very severe. In the present study, the surface expansion is analyzed especially under various process conditions. The main goal of this study is to investigate the influence of degree of reduction in height, geometries of punch nose, friction and hardening characteristics of different aluminum alloys on the material flow and thus on the surface expansion on the working material. Two different materials are selected for investigation as model materials and they are AA 2024 and AA 1100 aluminum alloys. The geometrical parameters employed in analysis include punch corner radius and punch face angle. The geometry of punch follows basically the recommendation of ICFG and some variations of punch geometry are adopted to obtain quantitative information on the effect of geometrical parameters on material flow. Extensive simulation has been conducted by applying the rigid-plastic finite element method to the backward can extrusion process under different geometrical, material, and interface conditions. The simulation results are summarized in terms of surface expansion at different reduction in height, deformation patterns including pressure distributions along the interface between workpiece and punch, comparison of surface expansion between two model materials, geometrical and interfacial parametric effects on surface expansion, and load-stroke relationships. It has been concluded from the present study that the geometrical condition of punch is the most significant factor among the parameters employed in this study. It is also known from the simulation results that the difference in surface expansion according to different material properties is not more or less significant.

You might also be interested in these eBooks
Aluminium Alloys 2006 - ICAA10 View Preview

Info:

Periodical:

Materials Science Forum (Volumes 519-521)

Pages:

931-936

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.519-521.931

Citation:

Cite this paper

Online since:

July 2006

Authors:

J.H. Ok, Beong Bok Hwang

Keywords:

AA1100, AA2024 Aluminium Alloy, ICFG Recommendation, Parametric Effects, Punch Face Angle, Surface Expansion

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] American Society for Metals: Source book on cold forming (ASM, U.S.A. 1975), p.266.

Google Scholar

[2] B. Bennani and N. Bay: J. Mater. Processing Tech. Vol. 61 (1996), p.275.

Google Scholar

[3] ICFG: General recommendations for design, manufacture and operational aspects of cold extrusion tools for steel components (ICFG Doc. No 6/82, Portcullis Press. 1983).

Google Scholar

[4] N. Bay, S. Lassen and K. B. Pedersen: Manufact. Tech. CIRP annals Vol. 40 (1991), p.239.

Google Scholar

[5] A. Danno, K. Abe. and F. Nonoyama: J. Jap. Soc. Tech. of Plasticity Vol. 24 (1983), p.213.

Google Scholar

[6] T. Mizuno, Y. Kojima, K. Kitamura and W. Zhu: J. Jap. Soc. Tech. of Plasticity Vol. 25 (1984), p.929.

Google Scholar

[7] T. Mizuno, W. Zhu, Y. Kojima and K. Sugimoto: J. Jap. Soc. Tech. of Plasticity Vol. 28 (1987), p.1060.

Google Scholar

[8] SFTC: DEFROM-2D Ver. 8. 0 Users Manual (Scientific Forming Technologies Corporation Inc., U.S.A. 2004).

Google Scholar

[9] Air Force Material Laboratory: Forming equipment, materials and practices (Metal and Ceramics Information Center 1973).

Google Scholar