Patent ID: 6560498
Filing Date: 2003-05-06
Classification: G05B

Abstract:
A ship hull-piece forming method comprising:(a) constructing a product database by using a relational database management system and by building a product model on a basis of information modeling about formation data; (b) measuring the shape of a plate and process information; (c) performing numerical analyses on a basis of thermal elastic-plastic theory, which have forming information on the measured plate and information on heating position as an off-line training or programming; (d) inferring forming information to be applied to the plate obtained through an artificial neural network based on data obtained by numerical simulations and measured from previous works; and (e) generating information on heating paths and heat conditions by calculating in-plane and bending strains from the relationship between the plate and an objective curved plate and from the relationship between the objective curved plate and the plate partially formed in the middle of formation; wherein the difference between any shaped plate partially formed in the middle of formation and the objective curved plate is measured during the process, and the in-plane and bending strains are numerically calculated based on that difference to provide the forming information; and wherein formation is completed by repeatedly making measurement and calculation at each processing step.