Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 21    No. 3    March 2011

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Alternative flat coil design for electromagnetic forming using FEM
M. AHMED1, S. K. PANTHI1, N. RAMAKRISHNAN2, A. K. JHA1,
A. H. YEGNESWARAN1, R. DASGUPTA1, S. AHMED3

1. Advanced Materials and Processes Research Institute(AMPRI), Bhopal-462064, India;
2. India Science Laboratory, GM, Bangalore-560066, India;
3. Maulana Azad National Institute of Technology ( MANIT), Bhopal-462007, India

Abstract:Electromagnetic forming (EMF) is a high velocity forming process that uses impulse magnetic force. Coil is an important component of EMF system which needs to be designed depending on application. Flat spiral coils are generally used for electromagnetic forming of sheet metals. However, with this type of coil the central portion of the workpiece experiences marginal magnetic force. This leads to in-sufficient deformation at this portion and other problems like air entrapment. In this study, a conceptual design of flat coil was proposed for better distribution of magnetic forces over the workpiece. Comparative analysis of distribution of magnetic force, magnetic field and current density using the proposed and the existing coil designs were carried out using FEM. The result indicates that the proposed coil design produces comparatively better magnetic force distribution over the workpiece. Calculation of self-inductance of such coils was also carried out and was compared with FE simulation.

 

Key words: electromagnetic forming; flat spiral coil; sheet metal forming; FEM

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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