Paper Title:
Influence of Process Parameters on T-Shape Tube HydroForming Characteristics for Magnesium Alloy
  Abstract

Due to the light weight and electromagnetic interference shielding capabilities in magnesium alloy material, it is widely utilized in 3C electronic components and automobile parts. However, its formability is very poor due to the phenomenon of negative strain hardening rate appearing as the deformation in large strain range, so it is usually formed as die casting or casting styles leads to much scrap, and manufacturing cost is thus increased. The objective of this study is to investigate the effect of process parameters on T-shape tube hydro-forming characteristics for magnesium alloy and it may offer the data resulting from the analysis to predict an acceptable product of tube fitting for magnesium alloy forming in industry. AZ31 magnesium alloy tube is used as the billet material for hydro-forming with hydraulic pressure as the main forming power combined with the mechanical auxiliary force from the punch to fabricate the T-shape tubing products. Finite element code DEFORM-3D is adopted to investigate the forming states of T-shape tube forming, by changing process parameters; such as punch velocity, hydraulic pressure, fillet radius of the die and tool-workpiece interface friction etc. to investigate the material flow of tube fitting, wall thickness variations, and stress and strain distributions. By qualifying the forming processes whether if it is completed or not, and synthesizing the overall analysis and judgment, we establish an admissible level of process parameter range for complete tube manufacture. The results show that suitable mechanical force can help material flow, prevent large strain deformation falling into the area of negative strain hardening rate, enhance magnesium alloy to become easy in forming and make tube fitting to be formed successfully.

  Info
Periodical
Key Engineering Materials (Volumes 364-366)
Edited by
Guo Fan JIN, Wing Bun LEE, Chi Fai CHEUNG and Suet TO
Pages
973-979
DOI
10.4028/www.scientific.net/KEM.364-366.973
Citation
S. Y. Lin, C.M. Chang, C.K. Chang, "Influence of Process Parameters on T-Shape Tube HydroForming Characteristics for Magnesium Alloy", Key Engineering Materials, Vols. 364-366, pp. 973-979, 2008
Online since
December 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: M. Loh-Mousavi, Kenichiro Mori, K. Hayashi, Seijiro Maki, M. Bakhshi
Abstract:The effect of oscillation of internal pressure on the formability and shape accuracy of the products in a pulsating hydroforming process of...
353
Authors: Gang Liu, Jun Yang Peng, Xiao Song Wang, Shi Qiang Zhu, Shi Jian Yuan
Abstract:Hydroforming processes of a Y-shaped stainless steel tube with d/t (ratio of diameter to thickness) of 183 is presented. FEM simulations were...
2796
Authors: Khalil Khalili, Seyed Yousef Ahmadi-Brooghani, Amir Ashrafi
Abstract:Tube hydroforming process is one of the metal forming processes which uses internal pressure and axial feeding simultaneously to form a tube...
618
Authors: Bu Gang Teng, Kai Li
Chapter 21: Materials Forming and Manufacturing Processes
Abstract:The loading path is crucial to the quality of forming parts in the process of tube hydroforming. The counterpunch is usually used to control...
2302
Authors: Bu Gang Teng, Gang Liu, Shi Jian Yuan
Chapter 9: Products Design, Manufacture and Design in Manufacture
Abstract:The counterpunch is usually used to control the protrusion height and also to control the evolution of thickness and avoid over thinning in...
1539