The general blanking sequence is OP05 and then stretched or formed into OP 10, followed by OP20, OP30, OP40, etc. There is another way to express it by fractions. For example, if this part has a 5 sequence, the first sequence is 1/5 and the second sequence is 2/5. . . . . The working procedure codes are as follows: BL blanking, DR drawing, FO forming, RST forming, drilling and turning,

FL flanging, TR trimming, PI punching, trimming and SEP cutting. In addition, before the process, C is added for wedge work, for example, C-RST C-TR is used for side shaping and side trimming respectively.