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以某车型的前隔板为研究对象,通过三维建模软件设计工艺补充面和压料面,借助有限软件对其成形工序进行模拟分析。将数值模拟和正交试验设计相结合,采用多目标优化方法优化前隔板零件成形工序的压边力和各段拉延筋阻力系数,得到优化的参数组合为压边力F=500 k N,拉延筋阻力系数K1=0.4,K2=0.4,K3=0.3,K4=0.6。极差分析表明,对最大减薄率影响最大的因素为拉延筋阻力系数K2,对最大增厚率影响最大的因素为拉延筋阻力系数K3。实验结果表明,采用优化后的参数得到实际成形零件无拉裂缺陷且零件厚度满足要求。
Taking the front bulkhead of a car as the research object, the surface and pressure surface were designed by the 3D modeling software, and the forming process was simulated and analyzed with finite software. Combining the numerical simulation and the orthogonal experiment design, the multi-objective optimization method is used to optimize the blank holder force and the drawbead coefficient of the drawbead in the forming process of the front bulkhead. The optimized parameter combination is the blank holder force F = 500 kN , Drawbead resistance coefficient K1 = 0.4, K2 = 0.4, K3 = 0.3, K4 = 0.6. The range analysis shows that the factor that has the biggest influence on the maximum reduction rate is the drawdown resistance coefficient K2, and the factor that has the biggest influence on the maximum thickening rate is the drawbead drag coefficient K3. The experimental results show that using the optimized parameters, the actual formed parts have no crack defects and the thickness of the parts can meet the requirements.