The gap between the minimum cutting edge cutting, trimming punching die when the distribution width is small, these are to be noticed.
刀口模切割线间的间隙最小，冲孔模修整时的分布宽度也很小，这些都是要注意的。
2
So it is very necessary to exploit a practical CAD system for panel trimming and punching die design.
所以，针对覆盖件开发一套实用的修边冲孔模cad系统无疑是十分必要的。
3
To reduce the cost and lead time of developing a trimmingdie, a method to obtain the trimming line in flange process is proposed on the basis of blank grid deformation.