This standard specifies the materials, technical conditions, structural types, dimensions and markings of the circular fixed plates of the die formwork. This standard is suitable for use as a punch fixing plate, and can also be used as a discharge plate, a hollow backing plate, and a concave mold fixing plate.
JB/T 7643.5-1994 history
2008JB/T 7643.5-2008 Stamping die plates.Part 5:Round retaining plates