论文部分内容阅读
采用有限元方法进行了大弯扭叶片热模压成形工艺的数值模拟,并利用模拟结果实现了成形叶片的反向展开,完成了叶片热模压成形的平板预制坯的优化设计,研究并将该方法所得到的展开平板坯与几何展开法和机械压平法的结果进行了对比.研究发现,传统展开方法得到的结果与有限元模拟法得到的结果相差很大,有限元方法考虑了实际成形中温度场的变化、工件定位方式、塑性变形过程,可以得到定位准确、周边余量很小且分布均匀、压形后贴模情况优良的平板预制坯,与目前常见的几何展开法和机械压平法相比取得了显著进步.实验结果表明,采用有限元法设计的预制坯可直接用于生产,无需反复调试,节约了材料,提高了生产效率.
The finite element method was used to simulate the hot embossing process of the blade with large bending radius. The simulation results were used to reverse the unfolding of the profiled blade. The optimal design of the flat preform for the hot stamping of the blade was completed. The developed flat slab is compared with the results of geometric unfolding method and mechanical flattening method.It is found that the results obtained by the traditional unfolding method differ greatly from those obtained by the finite element simulation method and the finite element method considers the actual forming Temperature field changes, workpiece positioning methods, plastic deformation process, you can get accurate positioning, the marginal margin is small and evenly distributed, after pressing the good shape of the plate preform, and the current common geometric expansion method and mechanical flattening The results show that the preform designed by the finite element method can be directly used in the production without the need of repeated debugging, saving the material and improving the production efficiency.