𝔖 Bobbio Scriptorium
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PREFORM DIE SHAPE DESIGN IN METAL FORMING USING AN OPTIMIZATION METHOD

✍ Scribed by GUOQUN ZHAO; ED WRIGHT; RAMANA V. GRANDHI

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
232 KB
Volume
40
Category
Article
ISSN
0029-5981

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✦ Synopsis

An optimization algorithm for preform die shape design in metal-forming processes is developed in this paper. The preform die shapes are represented by cubic B-spline curves. The control points of the B-spline are used as the design variables. The optimization objective is to reduce the di erence between the realized and desired ΓΏnal forging shapes. The sensitivities of the objective function with respect to the design variables are developed in detail. The numerical examples show that the optimization method and the sensitivity analysis developed in this paper are very useful and the design results are satisfactory. Importantly, the preform die shapes designed by this method are easily manufacturable and can be implemented in practical metal-forming operations. This optimization method and the sensitivity analysis can also be applied in the preform design of complex industrial metal-forming problems. ?

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