精密冲裁(简称精冲)是一项先进的冲压工艺。采用这一工艺,仅用一道工序就能冲压出精度达国标5级以上,光洁度达▽6以上的冲压件。因此,它不仅能简化过去一些精密冲压件的加工工序,同时可以加工一部分原来必须用机加工艺才能加工的零件,如仪器仪表中的齿轮、齿条、凸轮、平板等。这样就在保证零件质量的前提下,大大提高了材料的利用率和生产效率。如七五四厂有一批凸轮零件原用车、 Precision blanking (referred to as fine red) is an advanced stamping process. Using this process, only one process can be punched out of precision up to GB 5 or more, finish up ▽ 6 stampings. Therefore, it not only simplifies the machining process of some precision stamping parts in the past, but also can process some parts that originally must be machined to be machined, such as gears, racks, cams and plates in instrumentation. This will ensure the quality of parts under the premise of greatly improving the material utilization and production efficiency. If the factory has a number of five five four original cam parts car,