Study on Accurate modeling and process optimization of large cylindrical forgings

As a key part of national important technical equipment, large cylinder forgings play an important role in energy, steel and national defense industries.

Therefore, in order to let you have a better understanding of the large forging, the next main to give you a detailed description of the large cylindrical forging accurate modeling and process optimization research. I hope it was helpful.

Because most of the large cylinder forgings work in the environment of high temperature and high pressure, there are high requirements on the organization and comprehensive mechanical properties of the parts. However, at present, the design and research of the forging process of cylindrical forgings are all at the single and qualitative level, and in the simulation process, the finite element model is quite different from the actual situation. Therefore, it is of great significance to invert the parameters of the forging model of large cylindrical forgings and optimize the design of the process. This paper mainly focuses on the simulation research of the process of mandrel reaming of large cylindrical forgings, and carries out the following work:

(1) The finite element model of mandrel reaming process of cylindrical forgings was established, and the thermal conductivity and friction factors required for accurate modeling of forging process were inversely calculated by using the Tong Ren method. The homotopy method is modified by changing the prediction of Euler prediction in the tangent direction to the prediction of curve fitting. Thus, the curve prediction and Newton correction homotopy algorithm is proposed, which can effectively reduce the call of the forward problem and reduce the computation amount.

(2) The influence of anvil quantity under single anvil, mandrel rotation Angle and forging surface temperature on mandrel reaming process is analyzed by using accurate finite element model and simulation results of the first two steps. The simulation results show that the amount of anvil is the most important factor affecting forging quality. Mandrel rotation Angle and forging surface quality have an important influence not only on the forging permeability but also on the forging force.

(3) using the response surface method, with single anvil under the anvil, spindle rotation Angle and the forging surface temperature as the design variables to Latin hypercube experimental design, with the main deformation area and the difference between the connected area equivalent strain of the minimum as objective function, by fitting the objective function, the radial basis function and the genetic algorithm is adopted to large cylindrical shaft forgings core reaming process optimization design, The influence of process parameters on forging quality is analyzed.