The Numerical Simulation Of Large-scale Curved Sheet Metal Part’s Incremental Hyperbolic Air-bending Processing

This paper discussed a kind of integral cold forming of new incremental air-bending processing method to process sheet metals with large-scale. Relative to traditional bending by flame and water, it improved the production efficiency. In addition, it will improve the work environment. Also the process has been more reasonable and economic.Firstly, the elastic-plastic material mechanics parameters of WELDOX900 have been measured by tensile test. With the inherent constitutive model and unit in ABAQUS,3-D elastic-plastic finite element model of the air-bending process of large-scale steel plate has been built. By means of finite element analysis, the key parameters of the mold have been compared, which include the punch-die radius, the die opening and the feed rate of punch. These parameters’effect to bending and springback has been discussed. Then on the base of the result, the forming parameters of punch-die incremental bending large-scale curved sheet metal have been optimized.This paper determined the punch-die radius and the geometric programming of workpiece. By means of FEA, the result turns out to be good. Lastly, the experiment has proved the validity and feasibility of simulation and process planning.Regarding to the craft problem of wrinkle in the simulation process, it has been abstractly analyzed and simulated study. By means of adjusting a key craft parameter, the craft problem of wrinkle has been solved. This will give a guide to actual process.The bending rule of the anticlastic and sail-shaped sheet metal obtained by finite element analysis will do help to the further study of forming process of complex hook face.