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
pp.473-479
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.