레이저 용접 열원 모델 도출 시 소요시간 감소를 위한 간소화 모델 도출을 위한 연구 Part II : 용접 방향 길이 감소 모델
A Study on Simplified Model for Reducing Time During Deriving the Proper Laser Welding Heat Source Model Part II : Reduced model along welding direction
Laser welding is used in various industries due to fast welding speed, and prediction with FEM is needed to design. The multi-layered heat source model that can cover various models has been recently proposed to analyze laser welding, but it takes a lot of time because more than 2,000 cases are compared to derive the results. In order to reduce the time, the simplified model should be suggested. In order to derive a simplified model, laser welding heat transfer analysis was performed using the welding direction length and the convection coefficient of the welding direction surface as parameters. As a result, the model whose difference is less than 0.1% compared to reference model is deducted. The analysis time was reduced by about 90% from 48 hours to 5 hours. Also difference of convection coefficient on the welding direction surface does not affect the temperature distribution much.
목차
ABSTRACT 1. 서론 2. 유한요소해석 2.1 소프트웨어 2.2 유한요소해석 구성 및 경계 조건 2.3 물리적 특성 2.4 레이저 용접 열원 모델 3. 결과 4. 논의 5. 결론 References