Numerical optimization of die geometry in open die forging

Peter Christiansen, Jesper Henri Hattel, Niels Bay, Paulo A.F. Martins

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Abstract

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.
Original languageEnglish
Title of host publicationProceedings of International Conference on Advanced Manufacturing Engineering and Technologies (NEWTECH 2013)
Number of pages10
PublisherKungl. Tekniska högskolan I Stockholm
Publication date2013
Publication statusPublished - 2013
EventNEWTECH 2013 International Conference on Advanced Manufacturing Engineering and Technologies - Stockholm, Sweden
Duration: 27 Oct 201330 Oct 2013

Conference

ConferenceNEWTECH 2013 International Conference on Advanced Manufacturing Engineering and Technologies
CountrySweden
CityStockholm
Period27/10/201330/10/2013

Keywords

  • Ingot forging
  • Centreline porosity closure
  • Numerical simulation
  • Die design

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