Fr. Biglari et al., OPTIMUM DESIGN OF FORGING DIES USING FUZZY-LOGIC IN CONJUNCTION WITH THE BACKWARD DEFORMATION METHOD, International journal of machine tools & manufacture, 38(8), 1998, pp. 981-1000
A novel shape optimization method is presented for the design of prefo
rm die shapes in multistage forging processes using a combination of t
he backward deformation method and a fuzzy decision making algorithm.
In the backward deformation method, the final component shape is taken
as the starting point, and the die is moved in the reverse direction
with boundary nodes being released as the die is raised. The optimum d
ie shape is thereby determined by taking the optimum reverse path, A f
uzzy decision making approach is developed to specify new boundary con
ditions for each backward time increment based on geometrical features
and the plastic deformation of the workpiece. In order to demonstrate
this approach, a design analysis for an axisymmetric disk forging is
presented in this paper. (C) 1998 Elsevier Science Ltd. All rights res
erved.