Study on Bending Process of Thick Wall Pipe by Medium Frequency Induction Heating
The bending process of large diameter thick wall pipe by medium frequency induction heating-an advanced processing method, has been widely used. Aiming at the problems of too larger load in bending forming of large diameter thick wall pipe and ellipticity and the thinning rate exceeding the standard after bending, analyzing causes is that feeding velocity and wall temperature do not match. There are temperature difference and too lavge thermal deformation width inside and ontside wall in pipe. Taking a type of large diameter thick pipe as the research object, finite element model of bending pipe was established. Bending process was numerically simulated by using Deform software. Main technological parameters were optimized. The results show that bending pipes formed by using optimized process parameters are qualified products.The simulation results are in accordance with the experiment results.