Numerical simulation of forming process of thick-walled induction heating bending pipe with small bending radius
Aiming at the problem of bending forming large-diameter thick-walled pipe with small bending radius,based on ABAQUS finite element simulation software,the Dflux subroutine was used to simulate the temperature field for sequential thermo-mechanical coupling.The bending radius of 2.5D was simulated for steel pipes with outer diameter of Φ426 mm and wall thickness of 50 mm,and the effects of different heating positions on the forming quality of bending pipes were compared.It is found that the forming quality is higher when the heating position and the rotating shaft are in the same plane.Within a certain range of parameters,the effects of coil width,heating tem-perature and propulsion speed on the forming quality of the induction heating bending pipe were studied through orthogonal test combined with comprehensive scoring method with the thinning rate,thickening rate,ovality and bending radius as indicators.The results show that the comprehensive score index decreases with the increase of temperature,and increases with the increase of coil width and acceleration of propulsion speed.The optimal process parameters are obtained,namely coil width of 40 mm,heating temperature of 900 ℃,and propul-sion speed of 25 mm·min-1.
NETL
NSTL
万方数据
维普
