毛坯外形 meaning in English
blank shape
Examples
- On the assumption of ignoring the distortion of thickness , this paper determines the rough shape by the geometric modeling method of equal area developing using mixed mesh cell of triangle and quadrangle for the first time , presents the equal area developing arithmetic of quadrangle - triangle . on the virtual geometric symmetry axis , we puts forward the method of determining the developed coordinate of the point on the base band in the development of using regular quadrangle cell , determines the developed shape of internal structure in plane utilizing point - to - point mapping theory . furthermore , we realize the approximate developing of undeveloped - irregular boundary surface using a few triangle cells
本文结合型号研制中小曲率机翼整体壁板类零件坯料展开课题，基于板料厚向变形忽略不计的先验假设，首创混合四边形-三角形网格等面积展开的几何模拟法确定壁板类零件毛坯外形，给出了混合四边形-三角形网格等面积展开算法；提出了虚拟分割线的概念，采用虚拟几何对称轴，给出了规整四边形单元展开基带上结点的计算方法；采用映射原理和求交算法确定了壁板内部结构信息的展开定位。 - In this paper , by using non - linear finite element software , ansys / ls - dyna , simulate a forming of auto fall to ground skeleton part , get the contour of the semi - finished product , forecast the change of the blank thickness and the probable wrinkling , cracking , and from the simulation of the spring - back , obtain the spring - back tendency . so , get technology parameters , which are inextricable to forming production . all these will pose great significant to production in theory and reality
本文运用非线性有限元软件ansys ls - dyna对汽车落地骨架零件进行了冲压成形的数值模拟，得出了毛坯外形，预测了成形过程中板料壁厚变化和可能出现的起皱、破裂现象，通过回弹模拟，预测了回弹趋势，获得了该类零件成形所需要的工艺参数，对实际生产具有一定的指导作用。