抄録
The design of forged metal dies involves complex interrelationships between a large number of dimensions, which are generally determined through trial and error on the basis of professional experience and intuition. Once determined in
this way, however, the dimensions are hard to improve. We attacked this issue by performing a computer-aided engineering（CAE）analysis of the 23 dimensions of a die for a swaging hub. The dimensions were assigned to an L24 orthogonal
array with reduced separation between their levels to minimize interactions. Four effective control factors were thereby discovered. Next a CAE analysis was performed by varying the levels of the control factors without using an orthogonal array, the range of candidate designs was narrowed down to nine,and these nine candidates were evaluated by applying a noise factor（the hardness of the metal）．Optimal conditions were thereby found, under which expansion of the inner ring was reduced by 33 ％ without changing the axial force. Next, to explore seeds for further development, the causality search Taguchi（CS-T）method was applied: seventy intermediate characteristics were selected from the results of the CAE analysis of the L24 orthogonal array experiment and the effective ones were determined. On the basis of these intermediate characteristics it was possible to devise a mechanism and file a patent application for a new swaging method.
https://ror.org/05nm3qe34 
