선체 곡블록 필렛 용접의 적정 용접 조건 설정 프로그램에 관한 연구

Abstract

Research on program for determination

of suitable welding condition for the curved block.

Welding is one of the main processes in a ship construction. Automation of welding is a key work to increase the productivity of the shipbuilding. Welding robots and special automatic welding machines are widely used at the assembly stage for plane block. However, these automatic machines are not used yet for the curved blocks because they contain very complex and continuously changed weld joints. To achieve the automatization of welding for the curved block, an highly intelligent automatic welding system is required. Getting the optimal welding parameters is an important part for the suitable use of this automatic system.

This research aims to do develop a computer program for determination of suitable welding condition for the curved block of a ship hull. In this paper the relationships between welding parameters such as current and voltage, current and deposition rate were investigated through literature survey, theoretical study and the welding experiments. The concept of the critical deposited area and suitable welding current for that area are introduced to get the sound bead at the various inclination of the joint. This area and the current are dependent on the joint inclination and their relationships could be determined by a lot of welding experiments and use of artificial neural network.

Suitable pass number and the other welding parameters could determined by the relationships between the critical area and the welding parameters.

Finally, an algorithm to determine suitable parameter values was developed on the basis of their investigations and realized into a pc program.