Feature-based classification for forging and feature-based numerical simulation

Based on analyzing the form and deforming characters of forging parts, the definitions and construction of forging feature and its form feature are presented, and an feature-based classification for forging is developed. The concept model and parameterized data model of the feature class are proposed by introducing object-oriented technology. The method of expressing boundary restriction conditions and load conditions, which are complicated and the key factors in FEM simulation, in the feature class construction is discussed and the relation concept of feature classed is presented. Based on the feature-based classification for forging, we reduce two types of the parts deforming, which posses the characters of "extrusion" or "upsetting", so that feature-based finite element method (FFEM) is presented. In this paper, we develop the idea of integrating FFEM with adaptive FEM, concurrent FEM and knowledge-based FEM to simulate the deforming of large complicated forging parts.