摘要
加载路径是影响管件液压成形结果的关键因素,为了快速准确地确定管件液压成形中的加载路径,提出了利用理论计算与数值模拟相结合的方法来优化和调整成形的加载路径,确定最佳的成形区间.根据塑性力学理论计算出成形的初始内压,确定出成形区间,然后调整不同的轴向补料量进行数值模拟,并根据数值模拟的分析结果确定最佳的补料量,最终通过调节加载路径的斜率,获得合理的成形加载路径.实验结果表明:针对非对称结构的空心轴类件的液压成形,应用本方法快速地确定出合理的加载路径,零件顺利成形,且成形零件的减薄率在整个成形区间里是最小的.
Loading path is the key factor affecting the tube hydroforming,an effective method is described to quickly determine the optimal loading paths for a hydroforming nonsymmetrical component through numerical simulation and theoretical calculation. According to the theory of plastic mechanics,the engineering computational expression of internal pressure is proposed in the initial stage and the reasonable forming region is determined. By adjusting different axial feeds,the reasonable axial feed is given by simulating results. And then the optimal loading path is obtained by adjusting the slope. The experimental results show that the optimal loading path determined by this method can make the nonsymmetrical components formed successfully and the maximum thinning rate is the smallest among the formation zone in tube hydroforming process.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2009年第6期840-843,共4页
Materials Science and Technology
关键词
液压成形
加载路径
非对称管件
hydroforming loading paths nonsymmetrical componen
