在冲压工艺中，成形加工前往往需要对材料进行分离，冲裁是分离工艺中常见的形式，即用模具沿封闭线冲切板料，冲下的部分为工件，这些工件即为下道成形工序的毛坯。对圆形毛坯进行成形加工是冲压最常见形式，因而圆形冲裁也就是最常用的分离加工。根据金属板材的冲压成形性能 In the stamping process, the forming process is often required before the material separation, blanking is a common form of separation process, the mold along the closed line blanking sheet metal, washed down the part of the workpiece, the workpiece is formed under the Road Process rough. Forming round blanks is the most common form of stamping, so round blanking is the most commonly used separation process. According to the sheet metal stamping formability