汎用FEMプログラムを利用した鍛造複合工程の工程設計エキスパートシステム

概要

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The authors develop the expert system for process planning of combined cold forging sequence. Starting from the final product shape, the expert system designs a temporally pre-form shape and process by using case-based reasoning. Then, the temporally process is evaluated by the deformation analysis with using general purpose FEM code. When the result is not close to the post-form, temporary pre form shape is corrected by rules described on the cases with considering the result of the analysis. After then, corrected shape is analyzed by the FEM code again. The system repeats the above procedure until getting raw material and develops forging process plans. Thanks to this approach, the system designs forging sequences with using combined process, i. e. direct-indirect extrusion having different extrusion-ratio. A combined process requires lower energy and force than the ordinary in general, so the system is advantageous on developing the sequence design including combined process. The authors applied the system on actual forging example, and evaluate with experiment using plasticine. In the case, developed sequence design requires lower peak-manufacturing force than the ordinary sequence design including no combined process and only 62.5 [%] of the energy of the ordinary.
社団法人日本機械学会の論文
1998-11-25