다점 프레스를 이용한 곡면 성형의 가공 정보 산출을 위한 IDA 방법

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 22; no. 6; pp. 75 - 82
• Main Authors: 윤종성(JONG-SUNG YOON), 이장현(JANG-HYUN LEE), 유철호(CHEOL-HO RYU), 황세윤(SE-YUN HWANG), 이황범(HWANG-BEOM LEE)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2008
• Subjects: 해양공학; IDA(Iterative displacement adjustment)순환적 변위 조정; FEA Finite element analysts 유한요소해석; Multi-point press forming 다점 프레스; Spring-back 스프링 백
• ISSN: 1225-0767; 2287-6715

Flame bending has been extensively used in the shipbuilding industry for hull plate forming In flame bending it is difficult to obtain the desired shape because the residual deformation dependson the complex temperature distribution and the thermal plastic strain. Mechanical bending such as reconfigurable press forming multi-point press forming or die-less forming has been found to improve the automation of hull plateforming because it can more accurately control the desired shape than line heating. Multi-point forming is a process in which external forces are used to form metal work-pieces. Therefore it can be a flexible and efficient forming technique. This paper presents an optimal approach to determining the press-stroke for multi-point press forming of curved shapes. An integrated configuration of Finite element analysis (FEA) and spring-back compensation algorithm is developed to calculate the strokes of the multi-point press. Not only spring-back is modeled by elastic plastic shell elements but also an iterative algorithm to compensate the spring-back is applied to adjust the amount of pressing stroke. An iterative displacement adjustment (IDA) method is applied by integration of the FEA procedure and the spring-back compensation work. Shape deviation between the desired surface and deform￡d plate is minimized by the IDA algorithm.