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中文摘要：
在有限元仿真计算模拟翻边过程的基础上，提出了网格映射法来实现修边线的精确计算．将设计翻边轮廓线离散成点并投影到仿真后的网格模型上，确定投影点所在单元编号及相对于单元的位置，利用仿真过程建立的单元和节点映射关系计算出这些投影点在翻边坯料网格模型上的新坐标，然后构造出修边线，通过两至三次迭代计算后就可以实现修边线的精确计算．
英文摘要：
Using Finite Element Method （FEM） to simulate the flanging process, a kind of grid mapping method was put forward to acquire the trimming line. Discretizing the flanging contour line and projecting the obtained points onto the grid model after the flanging simulation, the numbers of elements including the project- ing points and their relative positions that the projecting points locate in the elements were determined, and the new coordinate values of the projecting points on flanging blank grid model were acquired through the mapping relationship of elements and nodes, which were established by simulation. Then, constructing the trimming line using the new coordinate values of the projecting points, the trimming line can be accurately calculated after only two or three iterative computations.
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