Youngchul Lee

Basic construction of intelligent expert system for riser design using database system and optimisation tools

Abstract Process design using computer simulation and optimisation has recently garnered a great deal of attention and much progress has been made through research in this area. Most research addresses the soundness of mass products, productivity optimisation, and improvement of product reliability. In the casting industry, a mainstay of the manufacturing sector, the design method of an optimal riser has also advanced greatly and it requires a clearly defined optimisation strategy. The purpose of working out a proper optimisation strategy is to minimise the time required for long series and iterations of calculations and thereby achieve an effective result. To this end, a database system was built by means of an image retrieval method. The authors also studied a way to automatically designate an appropriate point for installing a riser using solidification simulation and the Method of Modified Feasible Direction (MMFD), an optimisation method that uses the gradient search. The present study outlines the basic algorithm for the Intelligent Expert System (IES) for design of an optimal riser. It employs solidification simulation, a database system, and the MMFD. The study also addresses the application of the system to a simple cast.

The present and future application of computer simulation for casting design in Korean foundries

This paper shows applications and trials used to utilize computer-aided simulations for enhancing the productivity and quality of casting products in Korean foundries initially over a few decades. In Korea, KITECH (Korea Institute of Industrial Technology) took the important steps in developing and propagating computer simulation software for casting design. The “Z-CAST” developed by KITECH is the best computer simulation software for casting design in Korea and its schematics and application for the manufacturing field are introduced in this paper. Also, the future work of the casting industry is stated, especially, IES (Intelligent Expert System), the main stream of computer-aided production in Korea, is discussed.

Application of an automated water cooling system in the cyclic permanent mould casting process

Development and application of an automated water cooling system was carried out by the systematic research of numerical simulation and experimental verification in the cyclic permanent mould casti...