Multi-objective optimization of high strength steel roll bending forming process based on improved MOG WO
To investigate the influence of forming parameters on the forming quality of high strength steel roll bended parts and optimize process parameters,an optimization method for roll bending forming process was proposed.Firstly,the LS-DYNA finite element software was used to simulate the forming process of LG700 high strength steel U-shaped roll bended parts.Subsequently,the Box-Behnken re-sponse surface design was used in the simulation tests of high strength steel U-shaped roll bended parts.The influences of forming process parameters such as roll bending pass,over-bending angle,distance between forming stands and roller gap and geometric parameters such as thickness,flange height and corner radius on the deviation angle and longitudinal bow height of roll bended parts were analyzed.The second-order response model of the deviation angle and longitudinal bow height was obtained through fitting.Finally,the improved multi-objective gray wolf optimization(MOGWO)algorithm was adopted for the process optimization of roll bended parts with specific size and this method was validated through specific instances.The results show that using the optimized process parameters in the high strength steel roll bending forming process leads to a reduction of the deviation angle from 0.78° to 0.24°,and the longitudinal bow height from 1.58 mm to 1.20 mm.The forming quality is improved and the assembly precision requirements of related products are satisfied.
roll bending formingLS-DYNAhigh strength steelresponse surface methodMOGWO
万方数据
维普
