New Techniques for Prototype Manufacturing of Great Conical Ring and Its Numerical Simulation

Aiming at solving the difficulties of prototype manufacturing of conical ring for the steam generator shell of 600MW Nuclear Reactor,this paper developed a new techniques for the prototype manufacturing of the great conical ring utilizing ring rolling technology based on RAW200/160-5 ring rolling.And based on the common dynamical explicit FEM software Ansys/Ls-dyna,a 3D model of Radial–axial Ring Rolling Mill is created to simulate the dynamic process of ring rolling within a conical ring producing period so as to prove the reliability of the new techniques.The result of the simulation also shows that the method can observe the real time dynamical process of ring enlarging and fleck generating;optimizing the billet structure and the rolling techniques,and at the same time,the repeated tests can be avoided.