请使用专业的语言来表示下面这句话：模具加工制造中一项最基本的工序是冲裁是指使用冲裁模将板材沿特定外形进行冲裁的过程它由下料、切舌、打孔、修边、切边、和一些其他的加工工艺组成而在这些工艺中打孔和打孔 是最常用的工艺一般现在最常用的加工模具冲压设备的精度都是不咋个高的 所以它们加工处理的工件精度一般都在IT12级以下可能会导致变形和裂纹等问题。此外冲裁加工时也会影响到零件的尺寸精度其尺寸精度不宜高于I

In the manufacturing process of molds, one of the most fundamental processes is blanking, which refers to the process of using a blanking die to blank the sheet along a specific outline. It consists of processes such as blanking, tongue cutting, punching, edge trimming, and other processing techniques. Among these processes, punching and hole cutting are the most commonly used techniques. Generally, the precision of the most commonly used stamping equipment for processing molds is not very high, resulting in workpiece precision usually below IT12 level, which may cause problems such as deformation and cracking. In addition, the blanking process also affects the dimensional accuracy of the parts, and the dimensional accuracy should not be higher than IT10 level, to ensure that the dimensional accuracy of the blanked parts is not affected