電磁力による金属円板の高速成形に関する研究 : 第3報,周辺固定アルミニウム円板の自由張出し過程

概要

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An experiment on the free bulging of circular plates of annealed aluminum alloy by a "pancake" coil of single layer is presented in the first part. The bulging process is observed in detail by high speed photography. It is shown that the deformation begins at the annular part of the disk and the central part is bulged at the final stage of the process. A method of the simulation of the process is developed in the next part. The penetration of the magnetic field applied by the coil current into the disk is formulated by the diffusion equation to obtain impulsive electromagnetic pressure. The thickness of the disk is assumed to be large enough compared with the skin depth. An equation for the dynamic elastic-plastic deformation of a clamped disk loaded by magnetic pressure is derived. The simultaneous equations are solved numerically. The calculated bulging process agress pretty well with the experimental observation showing the validity of the simulation.
一般社団法人日本機械学会の論文
1987-12-25