Numerical investigation of the influence of punch element in multi-point stretch forming process

Numerical investigation of the influence of punch element in multi-point stretch forming process
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多点拉伸成形过程中冲头元件影响的数值研究

DOI:
10.1007/s00170-009-2420-1
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发表时间:
2010-07
影响因子:
3.4
通讯作者:
Wang, Shaohui
Wang, Shaohui
中科院分区:
工程技术3区
文献类型:
--
作者:
Cai, Zhongyi;Li, Mingzhe;Wang, Shaohui

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多点拉伸成形(MPSF)技术是一种灵活的成形方法,不需要传统的固定定形拉伸模具,因此适合小批量飞机外蒙皮零件的成形方法。多点拉伸模(MPSD)由冲头单元矩阵组成,冲头单元尺寸和单元半球端半径是MPSD的两个重要几何参数,是影响MPSF零件形状精度的主要因素。较小的冲孔元件尺寸使得MPSD在相同面积内的冲孔元件数量较多。具有不同元件数量和不同半球形端部半径的 MPSD 用于拉伸球形和环形鞍形零件。对MPSF零件的凹坑和形状误差进行了分析,结果表明冲头单元数和单元半球端半径对成形结果的影响。 MPSF测试表明MPSF的成型效果优良。
Multi-point stretch forming (MPSF) technology is a flexible forming method, and it eliminates the need to the traditional fixed shaped-stretching die and, therefore, is a suitable method for forming small batch quantities of aircraft outer skin parts. Multi-point stretch die (MPSD) is composed of a punch element matrix, the size of punch elements and the radius of the hemispherical end of elements are the two important geometrical parameters of MPSD and they are major factors to influence the shape accuracy of MPSF parts. The smaller size of punch elements makes the punch element number of MPSD larger in the same area. MPSDs with different element numbers and different hemispherical end radii are used for stretch spherical and toroidal saddle-shaped parts. The dimples and the shape error of MPSF parts were analyzed, and the results show the influences of punch element number and element hemispherical end radius on forming results. MPSF tests show that the forming effect of MPSF is excellent.
DOI: 10.1016/s0924-0136(02)00685-4
发表时间: 2002-10-11
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