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为了提高制件的成形质量、成形效率和成形极限,并了解不同成形角对多点复合渐进成形过程的影响,使用有限元软件MSC.Marc建立了多点复合渐进成形方锥台制件的三维有限元模型,并进行了不同成形角成形过程的数值模拟,探讨了成形角对制件等效塑性应变、厚度分布、厚度减薄率等的影响。模拟结果表明,成形角越大,等效塑性应变和厚度减薄率越大,单位时间内的相邻等效塑性应变增量和厚度减薄量越小,制件变形越均匀,板材塑性发挥越充分,但成形效率越低,制件越易发生破裂等成形缺陷;方锥台制件拐角处的厚度减薄较侧壁处的厚度减薄更严重。多点复合渐进成形试验表明,数值模拟结果和实验相吻合。
In order to improve the forming quality, forming efficiency and forming limit of the workpiece, and understand the influence of different forming angles on the multi-point compound progressive forming process, the finite element software MSC.Marc was used to build the three-dimensional The finite element model was established. The numerical simulation of different forming angle forming process was carried out. The effect of forming angle on the equivalent plastic strain, thickness distribution and thickness thinning ratio was also discussed. The simulation results show that the larger the forming angle is, the greater the equivalent plastic strain and the thickness thinning rate are, and the smaller the equivalent plastic strain increment and the thickness thinning are, the more uniform the deformation and the plasticity of the sheet The more complete, but the lower the forming efficiency, the more prone to parts such as cracking and other forming defects; corner truncated cone pieces of the thickness of the thinner than the thickness of the sidewall at the more serious. The multi-point compound progressive forming test shows that the numerical simulation is in good agreement with the experiment.