3D Simulation of Computer for Weld Temperature Field Based on 2D Measurement

Real-time measuring system for weld temperature field is developed by colorimetric method using ICCD images and 2D temperature field distribution is achieved quickly by using the system. For TIG welding of thin plate on mild steel, various sources analytical models is verified by the 2D measured results. The 2D computed temperature by using heat source model of double ellipsoidal Gaussian distribution gives best agreement with the measured value. Wider range temperature and 3D temperature field distribution is on line simulated by using the 3D temperature field numerical computed heat source model of double ellipsoidal Gaussian distribution and the measured 2D temperature field distribution as the boundary condition The agreement between the theoretically simulated and experimentally measured weld width is shown excellently.