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半球形厚壁封头冲压成形有限元分析及优化 被引量:14

Finite Element Analysis and Optimization of the Drawing Process of Head With Thick Semi-Spherical Shell
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摘要  在制造厚壁封头的过程中,经常由于锻造后的封头减薄量过大,最小壁厚值小于规定值,在强度方面不能满足要求;或者锻造后封头壁较厚,增加了机加工量。而厚壁封头冲压成形过程属于几何非线性和材料非线性的问题,很难用弹塑性力学理论的解析法进行研究。采用钢塑性有限元法,使用ANSYS有限元分析软件模拟了半球形厚壁封头冲压成形的整个过程,分析了成形后封头壁厚的变化规律。计算结果表明,封头心部的减薄量并非最大,减薄量最大值出现在靠近坯料中心的地方,边缘的直边部分增厚量最大,最大的减薄量或增厚量均达到坯料厚度的16%左右。通过优化坯料形状和尺寸,使封头易于成形且壁厚均匀。 In the process of forging head with thick shell, two occasions often occurs. One is that thickness decreases a lot and the minimal thickness is less than specified value so that the head cannot meet the demands of strength. Another is that the process redundancy is increased since decreased thickness is not enough. The drawing process of thick wall is a problem of geometry non-linear and material non-linear, so it is very difficult to be solved by the method of elasticity and plastics mechanics. Finite element analysis method of steel plasticity adopted, the drawing process of the head with thick wall was simulated with ANSYS software and the change rule of formed wall thickness was analyzed. The results show that the maximal decreased thickness do not locate in the central of head, but in the near of central. The maximal increase thickness positions in strait edge of head. Both the maximal decreased or increased thick reach 16% of the blank material thickness. Through the optimization of shape and dimension for the blank material, the head is prone to shape and the wall thickness is uniform.
出处 《辽宁石油化工大学学报》 CAS 2004年第4期51-53,共3页 Journal of Liaoning Petrochemical University
关键词 半球形封头 冲压成形 最小壁厚 ANSYS Semi-spherical head Stamping forge Minimal thickness ANSYS
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