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基于ABAQUS/Explicit平台,建立了双旋轮筒形件流动旋压成形有限元数值模拟模型,分析了DP800高强钢筒形件流动旋压成形过程的应力应变分布规律,并研究了旋轮成形角、旋轮圆角半径、旋轮进给比和壁厚减薄率4个关键工艺参数对DP800钢筒形件流动旋压力的影响。结果表明:等效应力和等效应变的最大值出现在旋轮与坯料接触区,已成形区域的应力均匀;工件外表面的等效应变均大于工件内表面等效应变,并沿着厚度方向逐渐减小;各旋压分力大小顺序为:径向旋压力>轴向旋压力>切向旋压力;随着圆角半径、旋轮进给比、壁厚减薄率的增大,各向旋压分力和总旋压力都呈增大趋势;随着成形角的增大,轴向旋压力和切向旋压力呈增大趋势,但径向旋压力和总旋压力呈先减小后增大趋势。
Based on the ABAQUS / Explicit platform, the finite element numerical simulation model of the flow spinning process of a double-spoke cylindrical roller was established. The stress-strain distribution of the DP800 high-strength cylindrical steel was analyzed. The forming angle , Round corner radius, rounding ratio and wall thickness thinning rate of 4 key process parameters on DP800 steel cylinder flow spinning pressure. The results show that the maximum of equivalent stress and equivalent strain appears in the contact area between the roller and the blank, and the stress in the formed area is uniform. The equivalent strain on the outer surface of the workpiece is larger than the equivalent strain of the inner surface of the workpiece. The order of the spinning components is as follows: the radial spinning pressure> the axial spinning pressure> the tangential spinning pressure; with the radius of the fillet, the feeding ratio of the spinning wheel and the increase of the thinning rate Both the spinning pressure and the total spinning pressure showed an increasing trend. With the increase of the forming angle, the axial spinning pressure and the tangential spinning pressure tended to increase, but the radial spinning pressure and the total spinning pressure first decreased After the increase trend.