Process design of combined deep drawing and electromagnetic sharp edge forming of DP980 steel sheet

This paper introduces combined deep drawing and electromagnetic sharp edge forming to improve the formability of advanced high strength steels. It includes a feasibility study of combined deep drawing and electromagnetic sharp edge forming of DP980 steel sheet with a thickness of 1.2 mm. A feasible approach of the combined forming process is investigated with numerical analysis which consists of pre-forming and electromagnetic sharp edge forming using the pre-formed sheet. Pre-forming analyses are conducted to check the formability of the material by utilizing a fracture forming limit diagram developed. Then electromagnetic forming is applied to the pre-formed workpiece to obtain a sharp edge that fails to form at the conventional pre-forming. In electromagnetic sharp edge forming, process parameters related to the forming force are optimized so that the desired shape is formed as close as possible. The optimization of the forming force is carried out satisfying the objective function and constraint functions established to minimize the deviation of a deformed shape from the desired shape without exceeding the forming limits. In order to induce the optimized forming force, the electromagnetic tool coil is designed with topology optimization. A new electromagnetic topology optimization formulation is developed for the design of an efficient tool coil. Numerical results and conclusions demonstrate the applicability of this combined forming process. (C) 2017 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2017-06
Language
English
Keywords

TOPOLOGY OPTIMIZATION; COMPRESSION; METALS; STRAIN; LIMITS; PATH

Citation

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, v.244, pp.331 - 343

ISSN
0924-0136
DOI
10.1016/j.jmatprotec.2017.01.035
URI
http://hdl.handle.net/10203/223646
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
  • Hit : 83
  • Download : 0
  • Cited 0 times in thomson ci
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡClick to seewebofscience_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0