Optimum Design On The Roughcast Frame Of Abnormity Section Rings & Computer Simulation For Rolling Process

Some key techniques about dynamic three-dimensional simulation of annular rolling parts were investigated in the present investigation. An entire finite-element simulation for the large-scale numerically-controlled radial-axial annular rolling machine with a type of RAW200/160-5 was established. The dynamic simulations for the entire rolling production process of three kinds of parts, i.e., rectangle-sectional annular parts, oblique L-shaped abnormity-sectional annular parts and flange annular parts with two kinds of different hole-types were realized. The numerical results were compared with the practical data.The main created achievements are stated as follows:(1) Based on the investigation of the metal flow law of plastic formation of annular rolling, the elastics/plastics constitutive relation of metal materials was deduced and dynamical numerical calculation on the solution to differential equations by difference integration was applied.(2) The entire finite-element simulation of the large-scale numerically-controlled radial-axial annular rolling machine with a type of RAW200/160-5 was established basing on ANSYS/LS_DYNA. A control simulation block was developed in response to control division of rolling process and some key techniques during simulating process were also studied and analyzed.(3) The whole production process for three kinds of parts, i.e., rectangle-sectional annular parts, oblique L-shaped abnormity-sectional annular parts and flange annular parts, was investigated by the developed software. The dynamical process for formation and generation of drawbacks of the annular parts was real-timely observed. Displacement, stress, strain, velocity and nephogram of every rolling node were obtained. The influence of roughcast structure and rolling parameters on annular formation effect was pointed out and the roughcast structure parameters and the rolling parameters of different annular sections were obtained after comparing and analyzing the rolling craftwork of roughcast configure size, main roll rotation speed, core roll feed, prick roll feed.(4) Further investigation indicated the basic framework of craftwork optimizing arithmetic. The materials were regarded as rigid plastic materials considering small elastic deformation quantity of most volumetric deformation problems. The rectangle-sectional parts were numerically simulated by finite element analysis basing on DEFORM and the shortage of this soft to the examination of elastic/plastic finite element method was revealed.(5) According to the numerical results, the production technics of oblique L-shaped annular section in annular rolling machine is designed. The rolling process was compared with the numerical results, and the validity of the numerical simulations was quliatively verifed.Based on common finite element analysis, it is expected to perform computer aided-design for the roughcast structure parameters and rolling parameters of annular parts instead of the commonly-used conventional heuristic method in the present production. It shows important significance to promote the rolling technique of annular parts, to reduce production cost and to improve the quality of products.