Abstract
In the present study, previously developed analytical approach (Int. J. Mech. Sci. 42 (2000) 273), based on the upper-bound theory, for the design of three-dimensional off-centric extrusion of arbitrarily shaped dies was applied to the extrusion of T-shaped sections from initially round billets with the experimental verifications. Here, non-symmetric T-shaped sections as well as symmetric ones were considered. A computer program was written to obtain optimum die design which yield the lowest upper-bound for a given reduction in area, die length, its off-centric positioning and the frictional conditions. Computations were carried out both for the converging (ruled-surface) and the smooth curved (advanced-surface) dies. Curvature of the extruded product and simulated deforming grid pattern were also predicted. A sophisticated CAD/CAM package was used in conjunction with the CNC and EDM processes to manufacture the streamlined dies for the extrusion of T-shaped sections. The theoretical predictions were observed to be in good agreement with the experimental results.
Original language | English (US) |
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Pages (from-to) | 2961-2987 |
Number of pages | 27 |
Journal | International Journal of Mechanical Sciences |
Volume | 43 |
Issue number | 12 |
DOIs | |
State | Published - Dec 2001 |
Externally published | Yes |
Keywords
- Analysis
- Experiments
- Non-symmetric T-shaped section
- Three-dimensional off-centric extrusion
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Aerospace Engineering
- Ocean Engineering
- Applied Mathematics
- Materials Science(all)
- Civil and Structural Engineering