Christiansen, Peter1; Hattel, Jesper Henri1; Bay, Niels1; Martins, Paulo A.F.3
1 Department of Mechanical Engineering, Technical University of Denmark2 Manufacturing Engineering, Department of Mechanical Engineering, Technical University of Denmark3 Instituto Superior Técnico
This paper deals with numerical optimization of open die forging of large metallic ingots made by casting implying risk of defects, e.g. central pores. Different material hardening properties and die geometries are combined in order to investigate, which geometry gives rise to maximum closure of a centreline hole in a single compression operation. Friction is also taken into account. The numerical analysis indicates that a lower die angle of approximately 140o results in the largest centreline hole closure for a wide range of material hardening. The value of optimum die angle is not influenced by friction, which was found only to change the degree of centreline porosity closure in case of small lower die angle.
Proceedings of International Conference on Advanced Manufacturing Engineering and Technologies (newtech 2013), 2013
Ingot forging; Centreline porosity closure; Numerical simulation; Die design
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NEWTECH 2013 International Conference on Advanced Manufacturing Engineering and Technologies