文档介绍：外文原文
An automated welding operation planning system
for block assembly in shipbuilding
Kyu-Kab Cho*, Jung-Guy Sun, Jung-Soo Oh
Abstract
The block assembly process is one of the most important manufacturing processes for shipbuilding. Since block posed of several steel plates and steel sections with predetermined shapes according to ship design, the welding operation planning to construct a block is a critical activity for shipbuilding, but this activity has traditionally been experience based. Thus, it is required to develop an automated welding operation planning system to assemble blocks. This paper describes the development of an automated welding operation planning system for block assembly in shipbuilding. Based on the information about parts, topological relationship between parts and assembly sequences for block, the developed system performs the determination of welding postures, welding methods, welding equipment and welding materials. The developed system implemented essfully for real blocks constructed in shipyard.
Keywords: Block assembly; Expert system; Operation planning; Welding process
1. Introduction
Shipbuilding is traditionally a labor-intensive assembly industry that employs the welding process as a basic production technology. In shipbuilding, there are several types of manufacturing process planning for cutting and bending, assembly, out- fitting, and erection. Among these process planning activities, the assembly process planning is by far the most important, since the construction process for a hull prises approximately 48~50% of the total shipbuilding process [1,2]. The main operation for block assembly is the welding operation. The welding operation planning problems in block assembly are very difficult to solve because
all blocks are different in size, type, and constituting sub-assemblies that depend on the types of ships. Also, since this activity has traditionally been experienced-based, welding operation planning in shipbuild