MOLD CONCEPTUAL DESIGN BASED ON FUZZY LOGIC

摘要

Mold conceptual design is the most important phase of mold design. The decisions made during this phase are of high level and have a direct influence on performance of the mold and development costs. The main task for mold conceptual design is the in-principle determination of each mold element type (design scheme). Because of its non-algorithmic nature, technologies and methodologies such as knowledge-based system (KBS), case-based reasoning (CBR) has been used to do the work. In this paper, a novel approach was proposed to map mold element design requirements onto the corresponding design scheme by using fuzzy logic. The proposed methodology follows three steps: (1) Design requirements for mold element is extracted and generalized. (2) Possible design schemes are presented. (3) The fuzzy mapping relationship between mold element design requirements and design scheme is established based on fuzzy composition and fuzzy relation transition matrices that are assigned by domain experts. A gate type selection example was presented to illustrate the feasibility of the proposed methodology.