Paper Titles
Numerical Analysis on the Extruded Volume and Length Ratios of Backward Tube to Forward Rod in Combined Extrusion Processes
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An Analysis on the Forming Characteristics of AA 6063 Aluminium Alloy in Radial-Forward Extrusion Process
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An Analysis on the Surface Expansion of Aluminium Alloys in Backward Can Extrusion Process
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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
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Work Hardening Behaviour of an Al-2.8Mg-0.16Sc Alloy
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Experimental Study of the Stretch Flange Formability of Al-Mg Sheet
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An Analysis on the Force Requirement of Combined Operations for Forward and Backward Tube Forming

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Abstract:

In the present study, the finite element analysis has been conducted to investigate the deformation characteristics of forward and backward can extrusion process using AA 1100 aluminum alloy tubes in terms of maximum forming load and extruded length ratio in a combined material flow. A commercially available code is used to conduct rigid-plastic FEM simulation. Hollow tubes are selected as initial billets and the punch geometries follow the recommendation of ICFG. Selected design parametrs involved in simulation includes punch nose radius, die corner radius, frictional condition, and punch face angle. The investigation is foucused on the analysis of deformation pattern and its characteristics in a forward tube extrusion combined simultaneously with backward tube extrusion process main in terms of force requirements for this operation according to various punch nose radii and backward tube thickness. The simulation results are summarized in terms of load-stroke relationships for different process parameters such as backward tube thickness, die corner radii, and punch face angle, respectively, and pressure distributions exerted on die, and comparison of die pressure and forming load between combined extrusion and two stage extrusion process in sequencial operation. Extensive analyses are also made to investigate the relationships between process parameters and extruded lengths in both forward and backward directions. It has been concluded from simulation results that a) the combined operation is superior to multi-stage extrusion process in sequential operation in terms of maximum forming load and maximum pressure exerted on die, b) the length of forward extruded tube increases and that of backward extruded tube decreases as the thickness ratio decreases, and c) the forming load is influenced much by the thickness ratio and the other design factors such as die corner radius and punch face angle does not affect much on the force requirement for the combined extrusion process.

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Periodical:

Materials Science Forum (Volumes 519-521)

Pages:

943-948

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.519-521.943

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Online since:

July 2006

Authors:

Beong Bok Hwang, G.M. Lee, Y.H. Lee, J.H. Ok, S.H. Kim

Keywords:

AA1100, Combined Material Flow, Maximum Forming Load, Maximum Pressure on Die, Rigid Plastic FEM

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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