Fine blanking is precision blanking, including powerful blank holder precision blanking, opposite die precision blanking and plane blank holder precision blanking. Fine blanking parts mainly include electronic materials, parts, structural parts, etc. The shape tolerance, dimensional tolerance, geometric tolerance and shear surface quality of fine blanking parts are much higher than those of ordinary blanking.
The biggest difference between fine blanking and ordinary blanking lies in the process. In the process of fine blanking, the tearing of sheet metal will be restrained, and the workpiece will keep consistent before separating from the sheet metal. In the process of fine blanking, the sheet metal is always in the process of plastic deformation. The ordinary blanking control the tearing of sheet metal in the blanking process, and the equipment is not as advanced as the fine blanking equipment.