GH5188密排孔薄板滚弯成形孔变形特征分析

Analysis of Deformation Characteristics of Holes on GH5188 Sheet with Densely Holes Formed by Roll Bending

摘要:

在解决了高温合金GH5188密排孔薄板三辊非对称滚弯成形有限元建模中的材料模型、几何模型、网格划分等关键技术问题后,建立了密排孔薄板三辊非对称滚弯三维有限元模型。有限元模型仿真结果与实验结果吻合良好,该模型是可靠的。进而提出了密排孔薄板滚弯成形孔变形的定量表征方法,分析了密排孔薄板三辊非对称滚弯成形过程中孔的变形规律。结果表明：孔弯曲后,外表面孔的扩张量略大于内表面孔的压缩量,在滚弯过程中孔的变形量有轻微波动,略有增大；沿成形件同一轴向上的孔的变形量差值极小；沿成形件同一周向上的孔的变形量是波动变化的,但差值很小。

Abstract:

After solving the material model, geometric model, mesh generation and other key technical problems in the FE model of GH5188 sheet with densely holes, the 3D FE model of asymmetric three - roll bending of the sheet with densely holes was established. The simulation results of the FE model agree well with the experimental results, and the model is reliable. And then, a representation method for the deformation of the holes on the sheet with densely holes is proposed. The deformation rule of the holes on the sheet with densely holes is analyzed. The results show that the expansion of the outside face is slightly greater than the compression of the inside face after the hole bend, and the deformation of the holes fluctuates slightly and increases slightly during the rolling process.The deformation difference of the holes along the same axis direction of the forming part is teeny.The deformation of the holes along the same circumference direction of the forming part fluctuates, but the difference is very small.