Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30968
Title: Numerical and experimental investigation of preform design in non-axisymmetric warm forming
Authors: Kong, TF
Chan, LC 
Lee, TC
Keywords: Finite-element simulation
Non-axisymmetric component
Preform design
Titanium
Warm forming
Issue Date: 2008
Publisher: Springer
Source: International journal of advanced manufacturing technology, 2008, v. 37, no. 9-10, p. 908-919 How to cite?
Journal: International journal of advanced manufacturing technology 
Abstract: This paper describes a numerical and experimental investigation of preform design in non-axisymmetric warm forming in order to achieve a large reduction in the volume of flash. A titanium TA2 watch-case-like component was used as an example. Sixteen different shapes of hollow preforms were specially designed for finite-element simulation. Their diameters of the center-holes were designed based on the values of the diameters of end-face configurations of punches and ejectors. The corresponding thicknesses of the preforms were determined by the assumption of constant volume. Under the same processing conditions, the diameter of center-hole of the preform should be the inner diameter of ejector such that its volume of flash was able to be greatly reduced to 6% of the volume of the formed component whereas the volume of flash was approximately 25% in the conventional implementation. Experiments were subsequently performed to verify the simulation results. This study rationally demonstrates the success of the preform design for warm forming of non-axisymmetric components, and provides great improvement in the utilization of material in the bulk forming process. Thus, the achievement is a tremendous saving in materials, more than a fourfold, particularly for these rare and expensive alloys.
URI: http://hdl.handle.net/10397/30968
ISSN: 0268-3768
EISSN: 1433-3015
DOI: 10.1007/s00170-007-1036-6
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